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University of Hawaii – Manoa
1.
Tamura, Aileen Naomi.
Mechanism of meiotic spindle disappearance and regeneration during oocyte vitrification.
Degree: 2016, University of Hawaii – Manoa
URL: http://hdl.handle.net/10125/101715
► M.S. University of Hawaii at Manoa 2011.
As assisted reproductive technologies (ART) become the standard of care for many infertile individuals, there has been a…
(more)
▼ M.S. University of Hawaii at Manoa 2011.
As assisted reproductive technologies (ART) become the standard of care for many infertile individuals, there has been a growing demand for the technology to cryopreserve oocytes. A unique cryopreservation method, called vitrification, promises high rates of oocyte survival, fertilization and development. However, a potential problem with oocyte vitrification is the transient disappearance of the meiotic spindle during freezing. Normal development relies on the integrity of the meiotic spindle, and its malformations can lead to aberrant genetic segregation and birth defects. Our goal is to understand the mechanisms behind the meiotic spindle disappearance and reappearance during vitrification. This understanding is essential to develop safer and more effective vitrification procedures. To gain insight into the mechanisms, we examined the integrity of the spindle microtubules, and three centrosome components, NEDD1, pericentrin and γ-tubulin, in mouse oocytes at various steps during vitrification and thawing. The distribution of these components was assessed by immunostaining using specific antibodies. The Tyho-Galileo vitrification protocol was mainly used for this study, as it yielded the highest rate of oocyte survival in our hands. The spindle microtubules started to disappear gradually in the vitrification solutions, because of reduced temperatures and exposure to cryoprotectants, and became absent after exposure to liquid nitrogen. Regeneration of the spindle microtubules initiated during the thawing process, first in an excessive manner, generating a wide spindle and ectopic microtubule asters. However, the spindle was adjusted after the 37ºC incubation for normal size and shape, suggesting a dynamic nature of spindle regeneration. For centrosome components, partial staining of NEDD1 and γ-tubulin, but not pericentrin, was observed throughout the vitrification and thawing process. Thus, NEDD1 and γ-tubulin appear more resilient to the vitrification process than pericentrin, suggesting that they may serve as anchors in the centrosome to enable microtubule repolymerization during thawing. Our present study should lay a foundation for further studies to elucidate the mechanisms of spindle disappearance and regeneration during oocyte vitrification. Such insight would ultimately help improve the oocyte vitrification procedure to preserve fertility in women.
Subjects/Keywords: cryopreserve oocytes
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APA (6th Edition):
Tamura, A. N. (2016). Mechanism of meiotic spindle disappearance and regeneration during oocyte vitrification. (Thesis). University of Hawaii – Manoa. Retrieved from http://hdl.handle.net/10125/101715
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tamura, Aileen Naomi. “Mechanism of meiotic spindle disappearance and regeneration during oocyte vitrification.” 2016. Thesis, University of Hawaii – Manoa. Accessed March 03, 2021.
http://hdl.handle.net/10125/101715.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tamura, Aileen Naomi. “Mechanism of meiotic spindle disappearance and regeneration during oocyte vitrification.” 2016. Web. 03 Mar 2021.
Vancouver:
Tamura AN. Mechanism of meiotic spindle disappearance and regeneration during oocyte vitrification. [Internet] [Thesis]. University of Hawaii – Manoa; 2016. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/10125/101715.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tamura AN. Mechanism of meiotic spindle disappearance and regeneration during oocyte vitrification. [Thesis]. University of Hawaii – Manoa; 2016. Available from: http://hdl.handle.net/10125/101715
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universiteit Utrecht
2.
Vasse, E.
Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries.
Degree: 2015, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/310724
► In vitro assisted reproductive techniques in horses have experienced considerable improvement in the last years. Although the results of in vitro fertilization are still very…
(more)
▼ In vitro assisted reproductive techniques in horses have experienced considerable improvement in the last years. Although the results of in vitro fertilization are still very poor in horses, intracytoplasmatic sperm injection (ICSI) has been proved to be an efficient and successful technique to produce in vitro embryos and is become very popular in the equine industry. Before ICSI can take place, the
oocytes have to mature to metaphase II in vitro. Different maturation media have been developed in the horse and their correct com-position is paramount for a correct oocyte development. Moreover, maternal age has been shown to have a significant impact on oocyte quality and development abilities in other domestic species. The purpose of this study was to evaluate the effect of the media and of maternal age on the quality of equine
oocytes evaluated on the base of morphology and fluorescent DNA staining. One hundred forty two
oocytes were used. With the collection, the ovaries were divided in two groups; young mares with the age up to 14 years and old mares with the age more than 15 years. However, there was no significant difference developmen-tal or morphology between the two age groups. Also the two media used had no significant effect on either the phase of replication or the morphology of the
oocytes. Further research is needed to determine the direct effects of maternal age on the quality and developmental abilities of
oocytes.
Advisors/Committee Members: de Ruijter-Villani, M..
Subjects/Keywords: equine; oocytes; age; DNA staining
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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APA (6th Edition):
Vasse, E. (2015). Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/310724
Chicago Manual of Style (16th Edition):
Vasse, E. “Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries.” 2015. Masters Thesis, Universiteit Utrecht. Accessed March 03, 2021.
http://dspace.library.uu.nl:8080/handle/1874/310724.
MLA Handbook (7th Edition):
Vasse, E. “Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries.” 2015. Web. 03 Mar 2021.
Vancouver:
Vasse E. Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries. [Internet] [Masters thesis]. Universiteit Utrecht; 2015. [cited 2021 Mar 03].
Available from: http://dspace.library.uu.nl:8080/handle/1874/310724.
Council of Science Editors:
Vasse E. Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries. [Masters Thesis]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/310724

Universiteit Utrecht
3.
Vasse, E.
Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries.
Degree: 2015, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/320787
► In vitro assisted reproductive techniques in horses have experienced considerable improvement in the last years. Although the results of in vitro fertilization are still very…
(more)
▼ In vitro assisted reproductive techniques in horses have experienced considerable improvement in the last years. Although the results of in vitro fertilization are still very poor in horses, intracytoplasmatic sperm injection (ICSI) has been proved to be an efficient and successful technique to produce in vitro embryos and is become very popular in the equine industry. Before ICSI can take place, the
oocytes have to mature to metaphase II in vitro. Different maturation media have been developed in the horse and their correct composition is paramount for a correct oocyte development. Moreover, maternal age has been shown to have a significant impact on oocyte quality and development abilities in other domestic species. The purpose of this study was to evaluate the effect of the media and of maternal age on the quality of equine
oocytes evaluated on the base of morphology and fluorescent DNA staining. One hundred forty two oo-cytes were used. With the collection, the ovaries were divided in two groups; young mares with the age up to 14 years and old mares with the age more than 15 years. However, there was no significant difference developmental or morphology between the two age groups. Also the two media used had no significant effect on either the phase of replication or the morphology of the
oocytes. Further research is needed to determine the direct effects of maternal age on the quality and developmental abilities of
oocytes.
Advisors/Committee Members: de Ruijter-Villani, M..
Subjects/Keywords: oocytes; equine; age; morphology; quality
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Vasse, E. (2015). Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/320787
Chicago Manual of Style (16th Edition):
Vasse, E. “Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries.” 2015. Masters Thesis, Universiteit Utrecht. Accessed March 03, 2021.
http://dspace.library.uu.nl:8080/handle/1874/320787.
MLA Handbook (7th Edition):
Vasse, E. “Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries.” 2015. Web. 03 Mar 2021.
Vancouver:
Vasse E. Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries. [Internet] [Masters thesis]. Universiteit Utrecht; 2015. [cited 2021 Mar 03].
Available from: http://dspace.library.uu.nl:8080/handle/1874/320787.
Council of Science Editors:
Vasse E. Effect of age and media on the quality and developmental abilities of equine oocytes from slaughterhouse ovaries. [Masters Thesis]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/320787

Victoria University of Wellington
4.
Armstrong, Gina.
Investigating the Effects of Oocytes on Proliferation Rate and Gene Expression of Mouse Ovarian Surface Epithelium-Derived Cancer Lines.
Degree: 2016, Victoria University of Wellington
URL: http://hdl.handle.net/10063/5655
► The origin of the most common form of ovarian cancer (OC), epithelial OC (EOC), remains a contentious issue. Due to disease heterogeneity, EOC is unlikely…
(more)
▼ The origin of the most common form of ovarian cancer (OC), epithelial OC (EOC), remains a contentious issue. Due to disease heterogeneity, EOC is unlikely to originate from a single progenitor. This research explores an alternative hypothesis for the origin of EOC. During ovarian development, granulosa cells (GC) recruited from the ovarian surface epithelium (OSE) associate with
oocytes. During follicular growth, oocyte-secreted growth factors (OSF) facilitate GC phenotype and function. Thus, if
oocytes are lost prematurely from non-growing follicles, naïve GC remain. These cells, devoid of their germ cell regulator, may proliferate leading to neoplastic transformation and heterogeneous tumour phenotypes.
This study aimed to elucidate the effects of OSF on (i) proliferation of, and (ii) candidate gene expression in, two mouse OSE-derived cancer cell lines, namely mOSE T2 (p53-/-/Akt/c-myc) and BR (p53-/-/Brca1-/-/Akt/c-myc). The OSF tested were oocyte-secreted media (OSM) containing rat OSF, as well recombinant (rec) porcine (p) BMP15 and pGDF9. Tritiated-thymidine uptake was used as a measure of cell proliferation and quantitative PCR was performed to measure gene expression levels of Cdh1 (epithelial marker), Foxl2 (granulosa cell marker), Dab2 and Muc16 (cancer markers).
Exposure of mOSE T2 cells to OSM, but not rec pBMP15+pGDF9, resulted in decreased (P<0.02) proliferation rate but no change was observed in mOSE BR cells. Additionally, a decrease (P<0.02) in Muc16 mRNA levels was observed only in the T2 cell line incubated with OSM, but not rec pBMP15+pGDF9 and the BR cell line remained unaffected. Interestingly, Muc16 and Bmpr2 mRNA levels were lower overall in the mOSE BR, compared to the T2, cell line.
In summary, both proliferation rate and expression levels of the tumourigenesis marker Muc16 were reduced in the mOSE T2 cell line after the addition of OSF. This supports the alternative hypothesis that proliferation of naïve OSE-derived GC is kept in check by OSF however, upon premature loss of
oocytes or more specifically in the absence of OSF, these cells may proliferate and develop into EOC. Importantly, OSF were unable to suppress proliferation rate and Muc16 mRNA levels in cancer cells with a Brac1 mutation.
Advisors/Committee Members: Pitman, Janet.
Subjects/Keywords: Oocytes; Surface epithelium; Ovarian
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Armstrong, G. (2016). Investigating the Effects of Oocytes on Proliferation Rate and Gene Expression of Mouse Ovarian Surface Epithelium-Derived Cancer Lines. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/5655
Chicago Manual of Style (16th Edition):
Armstrong, Gina. “Investigating the Effects of Oocytes on Proliferation Rate and Gene Expression of Mouse Ovarian Surface Epithelium-Derived Cancer Lines.” 2016. Masters Thesis, Victoria University of Wellington. Accessed March 03, 2021.
http://hdl.handle.net/10063/5655.
MLA Handbook (7th Edition):
Armstrong, Gina. “Investigating the Effects of Oocytes on Proliferation Rate and Gene Expression of Mouse Ovarian Surface Epithelium-Derived Cancer Lines.” 2016. Web. 03 Mar 2021.
Vancouver:
Armstrong G. Investigating the Effects of Oocytes on Proliferation Rate and Gene Expression of Mouse Ovarian Surface Epithelium-Derived Cancer Lines. [Internet] [Masters thesis]. Victoria University of Wellington; 2016. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/10063/5655.
Council of Science Editors:
Armstrong G. Investigating the Effects of Oocytes on Proliferation Rate and Gene Expression of Mouse Ovarian Surface Epithelium-Derived Cancer Lines. [Masters Thesis]. Victoria University of Wellington; 2016. Available from: http://hdl.handle.net/10063/5655

University of Edinburgh
5.
Głuszek-Kustusz, Agnieszka Agata.
Dissecting mechanisms of chromosomemicrotubule interaction in oocytes by new imaging tools.
Degree: PhD, 2014, University of Edinburgh
URL: http://hdl.handle.net/1842/18009
► Chromosome alignment and orientation within the spindle in mitosis and meiosis are determined by chromosome-microtubule interaction. Evidence suggests that within the acentrosomal spindle the mechanism…
(more)
▼ Chromosome alignment and orientation within the spindle in mitosis and meiosis are determined by chromosome-microtubule interaction. Evidence suggests that within the acentrosomal spindle the mechanism of chromosome positioning is different from in mitotic spindle but its molecular bases are not well understood. I investigated how chromosome-microtubule interactions position the chromosomes within the spindle using Drosophila oocytes. I addressed the role and molecular mechanisms of kinetochore and chromosome interaction with microtubules in this process. I developed new live imaging reagents to observe dynamic chromosome-microtubule interaction. Live imaging combined with inactivation of kinetochores in oocytes revealed that kinetochore-microtubule attachment is required for three-step chromosome positioning in Drosophila oocytes: de-congression, change of orientation and re-congression. Augmin, a γ-tubulin recruiting complex, has been previously shown to be important for chromosome congression specifically in oocytes. Live imaging further showed that Augmin facilitates chromosome congression particularly in early stages of spindle assembly. Study of Augmin dynamics revealed that Augmin stably associates with spindle polar regions, specifically in oocytes. This meiotic regulation of Augmin function may contribute to generation of force pushing chromosomes toward spindle equator. Sentin protein has been shown to be important for microtubule plus end dynamics in mitosis. In meiosis, sentin mutant results in reduced distance between centromeres of homologous chromosomes. However, its meiotic role is unknown. Live imaging of the sentin mutant showed that in oocytes Sentin is required for preventing premature stabilization of kinetochore-microtubule attachments. As conclusion, I have used live imaging to reveal molecular basis of the interaction between chromosomes and microtubules particularly important for oocytes.
Subjects/Keywords: 571.8; kinetochore; spindle; oocytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Głuszek-Kustusz, A. A. (2014). Dissecting mechanisms of chromosomemicrotubule interaction in oocytes by new imaging tools. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/18009
Chicago Manual of Style (16th Edition):
Głuszek-Kustusz, Agnieszka Agata. “Dissecting mechanisms of chromosomemicrotubule interaction in oocytes by new imaging tools.” 2014. Doctoral Dissertation, University of Edinburgh. Accessed March 03, 2021.
http://hdl.handle.net/1842/18009.
MLA Handbook (7th Edition):
Głuszek-Kustusz, Agnieszka Agata. “Dissecting mechanisms of chromosomemicrotubule interaction in oocytes by new imaging tools.” 2014. Web. 03 Mar 2021.
Vancouver:
Głuszek-Kustusz AA. Dissecting mechanisms of chromosomemicrotubule interaction in oocytes by new imaging tools. [Internet] [Doctoral dissertation]. University of Edinburgh; 2014. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/1842/18009.
Council of Science Editors:
Głuszek-Kustusz AA. Dissecting mechanisms of chromosomemicrotubule interaction in oocytes by new imaging tools. [Doctoral Dissertation]. University of Edinburgh; 2014. Available from: http://hdl.handle.net/1842/18009

University of Sydney
6.
Lowe, Jenna Louise.
Lipid metabolism during the in vitro production of porcine embryos
.
Degree: 2014, University of Sydney
URL: http://hdl.handle.net/2123/13998
► Currently, the in vitro production (IVP) of porcine embryos suffers from low efficiency and reduced blastocyst quality. Poor outcomes from in vitro matured oocytes and…
(more)
▼ Currently, the in vitro production (IVP) of porcine embryos suffers from low efficiency and reduced blastocyst quality. Poor outcomes from in vitro matured oocytes and in vitro fertilised embryos have limited the use of assisted reproductive technologies (ARTs) within commercial porcine herds, reducing the potential for global genetic improvement programs. It is believed that this reduced developmental competency compared to in vivo embryos is attributable to altered metabolism resulting from in vitro culture. Improper or incomplete metabolic support from the culture media leads to production of inferior embryos. Much of the prior research centres on metabolism of carbohydrates by oocytes and embryos, with the formulation of media based on this knowledge. However, oocytes and embryos also contain endogenous lipid substrates, and there is a lack of understanding as to how and when these stores are utilised. Lipids are a dense form of energy storage, and there is evidence of their metabolism by oocytes and embryos for energy generation. Porcine oocytes and embryos have higher intracellular lipid content than other domestic livestock species, and this makes them an excellent model for studying aspects of lipid metabolism in vitro. The aim of this study was to examine the impact of lipid metabolism on the acquisition of developmental competence during porcine IVP, and how this is affected by the presence or absence of exogenous carbohydrates. Stimulation or inhibition of the β-oxidation pathway was used to discern the importance of fatty acid oxidation to oocyte maturation and embryo development during in vitro maturation (IVM), in vitro fertilisation (IVF) and in vitro embryo culture (IVC). During IVM, it was identified that porcine oocytes are capable of using different substrates to compensate for deficiencies in others. While pyruvate and glucose are preferentially utilised to support maturation, upregulation of β-oxidation can compensate for a low glucose concentration and an absence of pyruvate to support nuclear maturation. Although there was no discernible decrease in lipid content associated with this, lipids provide such a dense energy reserve that any usage may have been beyond the limit of detection. Inhibition of β-oxidation in the absence of carbohydrates had a greater effect on nuclear maturation compared to inhibition in complete media. This indicates that lipid metabolism plays a minor role during oocyte maturation in the presence of carbohydrates and is likely to be more important when other substrates are deficient. Energy generation prior to fertilisation is an important factor in the developmental outcomes of subsequent embryos. Upregulation of β-oxidation for the duration of IVF increased cleavage rates, but doses above 6mM L-carnitine led to decreased blastocyst development. This effect may be attributable to the antioxidant activity of L-carnitine, with low levels of reactive oxygen species (ROS) being required at fertilisation for normal sperm function and sperm-oocyte interactions. Oocyte…
Subjects/Keywords: porcine;
lipid metabolism;
porcine oocytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lowe, J. L. (2014). Lipid metabolism during the in vitro production of porcine embryos
. (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/13998
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lowe, Jenna Louise. “Lipid metabolism during the in vitro production of porcine embryos
.” 2014. Thesis, University of Sydney. Accessed March 03, 2021.
http://hdl.handle.net/2123/13998.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lowe, Jenna Louise. “Lipid metabolism during the in vitro production of porcine embryos
.” 2014. Web. 03 Mar 2021.
Vancouver:
Lowe JL. Lipid metabolism during the in vitro production of porcine embryos
. [Internet] [Thesis]. University of Sydney; 2014. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/2123/13998.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lowe JL. Lipid metabolism during the in vitro production of porcine embryos
. [Thesis]. University of Sydney; 2014. Available from: http://hdl.handle.net/2123/13998
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta
7.
Ahmad, Mohammad Sharif.
Chromosomes and oocyte nuclei of the domestic fowl.
Degree: PhD, Department of Animal Science, 1969, University of Alberta
URL: https://era.library.ualberta.ca/files/3197xn88s
Subjects/Keywords: Chickens – Cytology.; Oocytes.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ahmad, M. S. (1969). Chromosomes and oocyte nuclei of the domestic fowl. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/3197xn88s
Chicago Manual of Style (16th Edition):
Ahmad, Mohammad Sharif. “Chromosomes and oocyte nuclei of the domestic fowl.” 1969. Doctoral Dissertation, University of Alberta. Accessed March 03, 2021.
https://era.library.ualberta.ca/files/3197xn88s.
MLA Handbook (7th Edition):
Ahmad, Mohammad Sharif. “Chromosomes and oocyte nuclei of the domestic fowl.” 1969. Web. 03 Mar 2021.
Vancouver:
Ahmad MS. Chromosomes and oocyte nuclei of the domestic fowl. [Internet] [Doctoral dissertation]. University of Alberta; 1969. [cited 2021 Mar 03].
Available from: https://era.library.ualberta.ca/files/3197xn88s.
Council of Science Editors:
Ahmad MS. Chromosomes and oocyte nuclei of the domestic fowl. [Doctoral Dissertation]. University of Alberta; 1969. Available from: https://era.library.ualberta.ca/files/3197xn88s

Universidade Federal de Viçosa
8.
Giancarlo Magalhães dos Santos.
Diferentes tempos de exposição e meios para o transporte na taxa de maturação "in vitro" de ovócitos bovinos.
Degree: 2008, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1645
► O objetivo do presente trabalho foi avaliar e comparar a influência dos diferentes tempos de exposição e meios no transporte de ovócitos imaturos bovinos sobre…
(more)
▼ O objetivo do presente trabalho foi avaliar e comparar a influência dos diferentes tempos de exposição e meios no transporte de ovócitos imaturos bovinos sobre a taxa de maturação in vitro. Foram utilizados 799 ovócitos imaturos, distribuídos em dez tratamentos, sendo um controle. Foram testados três meios de transporte: Talp-Hepes, segundo BAVISTER et al. (1983); Talp-Hepes modificado, acrescido de 10 g/mL de FSH e 0,0454 mM de Piruvato de Sódio e TCM modificado sem NaHCO3, acrescido de 5,665 mM de Hepes, 0,999 mM de NaCl, 0,0412 mM de Lactato de Cálcio, 0,0454 mM de Piruvato de Sódio, 10.000 UI de Penicilina G sódica, 0,005g% de Estreptomicina, 0,4g% de BSA e 10 g/mL de FSH. Em cada um dos meios utilizados, os ovócitos foram mantidos em placa aquecida a 38C por um período de duas, quatro e oito horas. Após o término do tempo de exposição, os ovócitos foram submetidos a cultivo in vitro em meio TCM 199 acrescido de 10% de SVE e 10 g/mL de FSH, em estufa de CO2, por 24 horas, para posterior avaliação da taxa de maturação nuclear. No tratamento controle, após a decantação e seleção dos ovócitos, eles foram imediatamente submetidos ao procedimento de cultivo in vitro. Observou-se que nos tratamentos com Talp-Hepes em tempos de duas, quatro e oito horas foram obtidas taxas de maturação nuclear de 84,7; 81,2 e 81,3%, respectivamente. No meio Talp-Hepes modificado foram registradas taxas de 72,2; 82,0 e 82,2%, e no meio TCM modificado, taxas de 80,0; 78,6 e 80,0%, respectivamente, para os tempos duas, quatro e oito horas. No tratamento controle, observou-se 80,1% de metáfase II. Conclui-se que os meios utilizados para o transporte dos ovócitos imaturos e o tempo decorrido da coleta até incubação para a maturação in vitro não influenciaram (P>0,05) a taxa de maturação nuclear. Deste modo, estes meios se mostram uma possível alternativa para o transporte dos ovócitos bovinos destinados à produção in vitro de embriões.
The objective of this work was to assess and compare the influence of different expositon time and transportation media on in vitro maturation of immature bovine ocytes. We used 799 immature oocytes, distributed in ten treatments, one of them, the control. Three transportation media were tested: Talp-Hepes, according to BAVISTER et al. (1983); modified Talp-Hepes, with 10 g/mL of FSH and 0,0454 mM of Sodium Piruvate and modified TCM without NaHCO3, with 5,665 mM of Hepes, 0,999 mM of NaCl, 0,0412 mM of Calcium Lactate, 0,0454 mM of Sodium Piruvate, 10.000 UI of Sodic Penicillin G, 0,005g% of Streptomycin, 0,4g% of BSA and 10 g/mL of FSH. In each of the used media, the oocyte were kept on a plate and heated at 38 °C for two, four and eight hours. After this time, the oocytes were submitted to in vitro cultivation in TCM 199 media with 10% of SVE and 10 g/mL of FSH, in CO2 oven, for 24 hours, for later nuclear maturation rate evaluation. In the control, after the oocyte decanting and selection, they were immediately submitted to in vitro cultivation procedure. We observed that in the Talp-Hepes treatment with…
Advisors/Committee Members: Carlos Antônio de Carvalho Fernandes, Tarcízio Antônio Rego de Paula, Luiz Sergio de Almeida Camargo, João Henrique Moreira Viana, José Domingos Guimarães, Orlando Marcelo Vendramini, Eduardo Paulino da Costa.
Subjects/Keywords: REPRODUCAO ANIMAL; Bovinos; Ovócitos; FIV; Bovine; Oocytes
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Santos, G. M. d. (2008). Diferentes tempos de exposição e meios para o transporte na taxa de maturação "in vitro" de ovócitos bovinos. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1645
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Santos, Giancarlo Magalhães dos. “Diferentes tempos de exposição e meios para o transporte na taxa de maturação "in vitro" de ovócitos bovinos.” 2008. Thesis, Universidade Federal de Viçosa. Accessed March 03, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1645.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Santos, Giancarlo Magalhães dos. “Diferentes tempos de exposição e meios para o transporte na taxa de maturação "in vitro" de ovócitos bovinos.” 2008. Web. 03 Mar 2021.
Vancouver:
Santos GMd. Diferentes tempos de exposição e meios para o transporte na taxa de maturação "in vitro" de ovócitos bovinos. [Internet] [Thesis]. Universidade Federal de Viçosa; 2008. [cited 2021 Mar 03].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1645.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Santos GMd. Diferentes tempos de exposição e meios para o transporte na taxa de maturação "in vitro" de ovócitos bovinos. [Thesis]. Universidade Federal de Viçosa; 2008. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1645
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh
9.
Nikalayevich, Elvira.
Meiotic spindle organization and chromosome condensation in Drosophila oocytes.
Degree: PhD, 2014, University of Edinburgh
URL: http://hdl.handle.net/1842/17908
► Errors in chromosome segregation during the first division of female meiosis are very common in humans and result in aneuploidy leading to reproduction problems. Chromosome…
(more)
▼ Errors in chromosome segregation during the first division of female meiosis are very common in humans and result in aneuploidy leading to reproduction problems. Chromosome segregation depends on the formation and function of the meiotic spindle as well as the structure of chromosomes, which need to condense to be able to orient and segregate properly. It is important to understand the mechanisms underlying the female meiotic spindle function and chromosome condensation to gain insight into female fertility problems. The female meiotic spindle assembles without centrosomes, so the mechanisms ensuring microtubule nucleation, spindle assembly and establishment of bipolarity act differently from those of mitosis or male meiosis. I identified a set of genes that are required for microtubule nucleation, spindle maintenance and centromere orientation in Drosophila female meiosis. This was accomplished by mapping previously uncharacterized Drosophila mutants and depleting already known genes by RNAi. I discovered that several proteins have a different role in female meiosis as compared to mitosis, which provides insight into the major differences between these systems. Little is known about the molecular mechanisms of chromosome condensation. The roles of only a few factors, such as condensin complexes, have been studied previously, and the evidence suggests that there are more molecular players required for chromosome condensation. To discover molecular mechanisms critical to this process, I depleted various chromosomal proteins by RNAi and screened for abnormalities of metaphase chromosome morphology in Drosophila oocytes by immunostaining and live imaging. I found that the conserved kinase NHK-1 plays a role in chromosome condensation in female meiosis. BAF is a critical NHK-1 substrate in this process and its phosphorylation is required for detachment of the chromosomes from the nuclear envelope to allow proper condensation. Also, I discovered that the nucleosome remodelling complex NuRD is crucial for chromosome condensation, especially for the chromosome arms. As a result of my PhD project I identified multiple factors required for meiotic spindle function. I also discovered two novel pathways of chromosome condensation that require the NuRD complex and NHK-1 activity.
Subjects/Keywords: 572.8; condensation; spindle; Drosophila; meiosis; oocytes
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nikalayevich, E. (2014). Meiotic spindle organization and chromosome condensation in Drosophila oocytes. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/17908
Chicago Manual of Style (16th Edition):
Nikalayevich, Elvira. “Meiotic spindle organization and chromosome condensation in Drosophila oocytes.” 2014. Doctoral Dissertation, University of Edinburgh. Accessed March 03, 2021.
http://hdl.handle.net/1842/17908.
MLA Handbook (7th Edition):
Nikalayevich, Elvira. “Meiotic spindle organization and chromosome condensation in Drosophila oocytes.” 2014. Web. 03 Mar 2021.
Vancouver:
Nikalayevich E. Meiotic spindle organization and chromosome condensation in Drosophila oocytes. [Internet] [Doctoral dissertation]. University of Edinburgh; 2014. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/1842/17908.
Council of Science Editors:
Nikalayevich E. Meiotic spindle organization and chromosome condensation in Drosophila oocytes. [Doctoral Dissertation]. University of Edinburgh; 2014. Available from: http://hdl.handle.net/1842/17908
10.
Li, Fang.
Age-Related Hamster Mitochondrial Changes and Oocyte Changes Following Autologous Platelet Mitochondrial Microinjection.
Degree: PhD, 2011, Old Dominion University
URL: 9781124990705
;
https://digitalcommons.odu.edu/biomedicalsciences_etds/53
► This study's objective was to verify age-related mitochondrial changes in oocytes from old hamsters compared with those from young hamsters. We used autologous platelet…
(more)
▼ This study's objective was to verify age-related mitochondrial changes in
oocytes from old hamsters compared with those from young hamsters. We used autologous platelet mitochondrial microinjection to improve the mitochondrial quality and quantity of aged
oocytes to improve their pregnancy potential. Metaphase II
oocytes were collected from super-ovulated female hamsters and prepared for biochemical and morphological analysis. Adenosine triphosphate (ATP) levels, mitochondrial DNA (mtDNA) number, reactive oxygen species (ROS) level and mitochondrial membrane potential (MMP) were determined in individual
oocytes from young and old hamsters. Transmission electron microscopy (TEM) allowed evaluation of oocyte ultra-structure. In
oocytes from old hamsters, ATP levels and mtDNA number were reduced an average of 35.4% and 51.8% respectively compared to young
oocytes. Lower MMP and higher ROS levels were observed in
oocytes from old hamsters compared with those from young hamsters. TEM analysis supported low mitochondrial quantity and increased mitochondrial electron density in old
oocytes, along with collapsed cytoplasmic lamellae. When comparing platelet mitochondria between young and old hamsters, no significant difference was found in ATP level per mitochondrion or ultrastructure. After autologous platelet mitochondrial microinjection, ATP production increased significantly in the microinjected group, however mtDNA number and embryo development to blastocyst stage were not improved. MitoTracker Green FM (MGF) was used to help quantify mitochondria, but the results conflicted with mtDNA and TEM data, which suggests that MGF, as a MMP dependent reagent, is not an ideal method to reflect mitochondrial number. Our data suggest that (1) age-related morphological and functional mitochondrial changes occur in
oocytes from old hamsters compared with young hamsters; (2) platelets can be used as a source for mitochondrial transfer; and (3) autologous platelet mitochondrial microinjection improves mitochondrial ATP production in old
oocytes. The fact that no change in blastocyst development after microinjection was observed does not rule out that there might not be improvement of post-implantation embryo development. Therefore, further study will focus on effect of autologous platelet mitochondrial microinjection on post-implantation embryo development.
Advisors/Committee Members: R. James Swanson, Frank J. Castora, Christopher Osgood, David T. Gauthier.
Subjects/Keywords: Mitochondrial changes; Oocytes; Platelets; Cell Biology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, F. (2011). Age-Related Hamster Mitochondrial Changes and Oocyte Changes Following Autologous Platelet Mitochondrial Microinjection. (Doctoral Dissertation). Old Dominion University. Retrieved from 9781124990705 ; https://digitalcommons.odu.edu/biomedicalsciences_etds/53
Chicago Manual of Style (16th Edition):
Li, Fang. “Age-Related Hamster Mitochondrial Changes and Oocyte Changes Following Autologous Platelet Mitochondrial Microinjection.” 2011. Doctoral Dissertation, Old Dominion University. Accessed March 03, 2021.
9781124990705 ; https://digitalcommons.odu.edu/biomedicalsciences_etds/53.
MLA Handbook (7th Edition):
Li, Fang. “Age-Related Hamster Mitochondrial Changes and Oocyte Changes Following Autologous Platelet Mitochondrial Microinjection.” 2011. Web. 03 Mar 2021.
Vancouver:
Li F. Age-Related Hamster Mitochondrial Changes and Oocyte Changes Following Autologous Platelet Mitochondrial Microinjection. [Internet] [Doctoral dissertation]. Old Dominion University; 2011. [cited 2021 Mar 03].
Available from: 9781124990705 ; https://digitalcommons.odu.edu/biomedicalsciences_etds/53.
Council of Science Editors:
Li F. Age-Related Hamster Mitochondrial Changes and Oocyte Changes Following Autologous Platelet Mitochondrial Microinjection. [Doctoral Dissertation]. Old Dominion University; 2011. Available from: 9781124990705 ; https://digitalcommons.odu.edu/biomedicalsciences_etds/53
11.
Yu, Changwei.
Analysis of the composition and the function of oocyte-specific TBP2-containing transcription machinery during mouse oogenesis : Analyse de la composition et de la fonction de la machinerie basale de transcription associée à TBP2 et spécifique des ovocytes au cours de l’ovogenèse murine.
Degree: Docteur es, Aspects moléculaires et cellulaires de la biologie, 2018, Université de Strasbourg
URL: http://www.theses.fr/2018STRAJ127
► La synthèse d’ARN au cours de la différenciation des ovocytes est essentielle à la fécondation et à l'initiation du développement précoce. La nature de la…
(more)
▼ La synthèse d’ARN au cours de la différenciation des ovocytes est essentielle à la fécondation et à l'initiation du développement précoce. La nature de la machinerie basale de transcription pendant la croissance ovocytaire n'est pas connue mais la protéine TBP est remplacée par une protéine semblable spécifique des vertébrés, TBP2. Pour comprendre le rôle de TBP2 dans l'initiation de la transcription, nous avons effectué un RNA-seq à partir d'ovocytes contrôles et Tbp2-/- et montré que l'expression des gènes les plus transcrits ainsi celle des éléments rétroviraux endogènes de type MaLR est diminuée. Par immunoprécipitation couplée à la spectrométrie de masse à partir d'ovaires, nous avons montré que TBP2 ne forme pas un complexe TFIID, mais est associé à TFIIA dans les ovocytes. Globalement nos données montrent qu’une machinerie d'initiation de la transcription spécifique différente du complexe canonique TFIID contrôle la transcription dans les ovocytes de souris.
Mammalian oocytes go through consecutive differentiation process, during which the synthesis and accumulation of RNAs are essential for oocyte growth, maturation, fertilization and early embryogenesis. Little is known about the nature and function of the oocyte Pol II transcription machinery. During oocyte growth TBP is replaced by a vertebrate specific paralog, TBP2, and Tbp2-/- females are sterile. To understand whether and how TBP2 is controlling transcription initiation during oogenesis, we carried out RNA-seq analyses from wild-type and Tbp2-/- oocytes from primary and secondary follicles. These analyses show a main decrease in the expression of the most abundant genes as well as specific down-regulation of the expression of the MaLR-type endogenous retroviral elements. To identify the nature of the complex associated with TBP2 in the oocytes, we carried out immunoprecipitation followed by mass spectrometry. We demonstrate that, in the oocytes, TBP2 associates with TFIIA, but does not assemble into a TFIID-type complex. Altogether, our data show that a specific TBP2-TFIIA-containing transcription machinery, different from canonical TFIID, drives transcription in mouse oocytes.
Advisors/Committee Members: Tora, Laszlo (thesis director), Vincent, Stéphane (thesis director).
Subjects/Keywords: TFIID; TBP2; RNA polymerase II; TFIIA; MaLR; Oocytes; TFIID; TBP2; RNA polymerase II; TFIIA; MaLR; Oocytes; 571.86
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yu, C. (2018). Analysis of the composition and the function of oocyte-specific TBP2-containing transcription machinery during mouse oogenesis : Analyse de la composition et de la fonction de la machinerie basale de transcription associée à TBP2 et spécifique des ovocytes au cours de l’ovogenèse murine. (Doctoral Dissertation). Université de Strasbourg. Retrieved from http://www.theses.fr/2018STRAJ127
Chicago Manual of Style (16th Edition):
Yu, Changwei. “Analysis of the composition and the function of oocyte-specific TBP2-containing transcription machinery during mouse oogenesis : Analyse de la composition et de la fonction de la machinerie basale de transcription associée à TBP2 et spécifique des ovocytes au cours de l’ovogenèse murine.” 2018. Doctoral Dissertation, Université de Strasbourg. Accessed March 03, 2021.
http://www.theses.fr/2018STRAJ127.
MLA Handbook (7th Edition):
Yu, Changwei. “Analysis of the composition and the function of oocyte-specific TBP2-containing transcription machinery during mouse oogenesis : Analyse de la composition et de la fonction de la machinerie basale de transcription associée à TBP2 et spécifique des ovocytes au cours de l’ovogenèse murine.” 2018. Web. 03 Mar 2021.
Vancouver:
Yu C. Analysis of the composition and the function of oocyte-specific TBP2-containing transcription machinery during mouse oogenesis : Analyse de la composition et de la fonction de la machinerie basale de transcription associée à TBP2 et spécifique des ovocytes au cours de l’ovogenèse murine. [Internet] [Doctoral dissertation]. Université de Strasbourg; 2018. [cited 2021 Mar 03].
Available from: http://www.theses.fr/2018STRAJ127.
Council of Science Editors:
Yu C. Analysis of the composition and the function of oocyte-specific TBP2-containing transcription machinery during mouse oogenesis : Analyse de la composition et de la fonction de la machinerie basale de transcription associée à TBP2 et spécifique des ovocytes au cours de l’ovogenèse murine. [Doctoral Dissertation]. Université de Strasbourg; 2018. Available from: http://www.theses.fr/2018STRAJ127

University of Alberta
12.
Behrouzi, Amir.
Effect of porcine luteinizing hormone on intrafollicular
milieu and gene expression in granulosa cells and oocytes in dairy
cows.
Degree: MS, Department of Agricultural, Food, and Nutritional
Science, 2014, University of Alberta
URL: https://era.library.ualberta.ca/files/6w924c30w
► In previous research, the use of porcine luteinizing hormone (pLH) in lieu of gonadotropin-releasing hormone (GnRH) for synchronizing ovulation in a fixed-timed artificial insemination protocol…
(more)
▼ In previous research, the use of porcine luteinizing
hormone (pLH) in lieu of gonadotropin-releasing hormone (GnRH) for
synchronizing ovulation in a fixed-timed artificial insemination
protocol in dairy cows improved pregnancy rates (42 vs 28%) without
increasing progesterone concentrations. The mechanisms associated
with this increase in pregnancy rates are not known. We
hypothesized that exposure to pLH alters intrafollicular
protein/gene expression compared to GnRH treatment, particularly
the oocyte-expressed members of the TGF-β superfamily, and EGF-like
growth factor, which regulate oocyte competence. To address this,
two studies were conducted to determine whether replacing pLH with
GnRH to synchronize ovulation in dairy cows altered intrafollicular
milieu and gene expression in mural granulosa cells and oocyte
cumulus complexes. The results indicated that the relative
abundance of BMP-15, GDF-9 and TGF-β1 were greatly increased in
pLH-treated cows. Since these factors promote cumulus expansion and
oocyte competence, they may have contributed to the pregnancy
increase previously reported.
Subjects/Keywords: Follicle; Granulosa cells; Dairy cows; Pregnancy rate; Luteinizing hormone; Oocytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Behrouzi, A. (2014). Effect of porcine luteinizing hormone on intrafollicular
milieu and gene expression in granulosa cells and oocytes in dairy
cows. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/6w924c30w
Chicago Manual of Style (16th Edition):
Behrouzi, Amir. “Effect of porcine luteinizing hormone on intrafollicular
milieu and gene expression in granulosa cells and oocytes in dairy
cows.” 2014. Masters Thesis, University of Alberta. Accessed March 03, 2021.
https://era.library.ualberta.ca/files/6w924c30w.
MLA Handbook (7th Edition):
Behrouzi, Amir. “Effect of porcine luteinizing hormone on intrafollicular
milieu and gene expression in granulosa cells and oocytes in dairy
cows.” 2014. Web. 03 Mar 2021.
Vancouver:
Behrouzi A. Effect of porcine luteinizing hormone on intrafollicular
milieu and gene expression in granulosa cells and oocytes in dairy
cows. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Mar 03].
Available from: https://era.library.ualberta.ca/files/6w924c30w.
Council of Science Editors:
Behrouzi A. Effect of porcine luteinizing hormone on intrafollicular
milieu and gene expression in granulosa cells and oocytes in dairy
cows. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/6w924c30w
13.
Chroni, Dafni.
Ηλεκτροφυσιολογική και βιοχημική μελέτη υποδοχέων σχετιζομένων με ασθένειες του κεντρικού νευρικού συστήματος.
Degree: 2018, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)
URL: http://hdl.handle.net/10442/hedi/43453
► Neuronal nicotinic acetylcholine receptors (nAChRs) are located mainly in the Central Nervous System (CNS) where they regulate the release of neurotransmitters and mediate fast neurotransmission.…
(more)
▼ Neuronal nicotinic acetylcholine receptors (nAChRs) are located mainly in the Central Nervous System (CNS) where they regulate the release of neurotransmitters and mediate fast neurotransmission. Neurotransmitters transfer the information from a neuron to an adjacent neuron or muscle cell. Some examples of neurotransmitters are acetylcholine (ACh), serotonin, γ-aminobutyric acid (GABA) and glycine. nAChRs belong to the ‘Cys-loop’ super-family of pentameric ligand-gated ion channels (pLGIC), since this type of receptors possess a characteristic loop formed by 13 highly conserved amino acids between two cysteine (Cys) residues bridged by a disulfide bond, at the N-terminal extracellular domain (ECD). Moreover the Cys-loop superfamily includes the γ-aminobutyric acid (GABAA and GABAC), glycine and serotonin (5-HT3) receptors. They consist of the combination of 9 α (α2-α10) and 3 β (β2-β4) subunits and they are distributed ubiquitously in the brain. The neuronal nAChRs exist either as homopentameric or as heteropentameric molecules. The α7 and α9 subunits are the only known human nAChR subunits that can form homopentamers. They are implicated in various neurological diseases, such as Alzheimer and Parkinson diseases, epilepsy, attention deficit hyperactivity disorder, depression, neuropathic pain and substance addiction. Thus, drug development for these receptors is a priority. These neurotransmitters bind to the ECD of the corresponding receptors, thus, it is very important to know the 3D structure of this region. In general, the ECD of neuronal nAChRs, consists of an N-terminal α-helix and a hydrophobic core of 10 β-strands (β1-β10). Some of the characteristic loops, linking these β-strands, contribute to the formation of the ligand- binding site. Loops A, B, and C contribute to the formation of the primary (+) binding site, whereas the loops D, E and F conferred from the adjacent subunit form the complementary (-) side of the ligand binding site.The principal binding sides of the neuronal nAChRs are very homologous among the various subunits, whereas there is little conservation in the complementary sides, which are those that confer selectivity to various drugs. Thus, in order to design highly specific and effective drugs towards a specific nAChR subtype and avoid side-effects, its in-depth structural and functional information is highly needed. Towards this aim, members of our laboratory have recently acquired important structural crystallographic data for the ECDs of two subunits of human nAChRs: the α9 and α2. In the nature, the α9 subunit forms either homopentamers or heteropentamers with α10, whereas α2 is known to form heteropentamers with the β2 subunit. It is worth mentioning that α2 presents high homology with the α4 subunit (78%), which is the most commonly found nAChR subunit in the human brain. In the above studies, the crystal structures of the ECDs of the human α9 and α2 subunits were presented. The structure of α9-ECD was determined as a monomer in its free-state and in its complexes with the…
Subjects/Keywords: Ωοκύτταρα; Νικοτινικός υποδοχέας ακετυλοχολίνης; Oocytes; Nicotinic acetylcholine receptor
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chroni, D. (2018). Ηλεκτροφυσιολογική και βιοχημική μελέτη υποδοχέων σχετιζομένων με ασθένειες του κεντρικού νευρικού συστήματος. (Thesis). National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Retrieved from http://hdl.handle.net/10442/hedi/43453
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chroni, Dafni. “Ηλεκτροφυσιολογική και βιοχημική μελέτη υποδοχέων σχετιζομένων με ασθένειες του κεντρικού νευρικού συστήματος.” 2018. Thesis, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Accessed March 03, 2021.
http://hdl.handle.net/10442/hedi/43453.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chroni, Dafni. “Ηλεκτροφυσιολογική και βιοχημική μελέτη υποδοχέων σχετιζομένων με ασθένειες του κεντρικού νευρικού συστήματος.” 2018. Web. 03 Mar 2021.
Vancouver:
Chroni D. Ηλεκτροφυσιολογική και βιοχημική μελέτη υποδοχέων σχετιζομένων με ασθένειες του κεντρικού νευρικού συστήματος. [Internet] [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2018. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/10442/hedi/43453.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chroni D. Ηλεκτροφυσιολογική και βιοχημική μελέτη υποδοχέων σχετιζομένων με ασθένειες του κεντρικού νευρικού συστήματος. [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2018. Available from: http://hdl.handle.net/10442/hedi/43453
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Jawaharlal Nehru University
14.
Pathak, Narendra H.
Molecular characterisation of gen; Molecular characterisation of gene(s) expressped
specifically in snake oocytes.
Degree: Molecular biology, 1997, Jawaharlal Nehru University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/17055
None
Bibliography p. 72-95
Advisors/Committee Members: Singh, Lalji.
Subjects/Keywords: Molecular biology; Snake oocytes
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pathak, N. H. (1997). Molecular characterisation of gen; Molecular characterisation of gene(s) expressped
specifically in snake oocytes. (Thesis). Jawaharlal Nehru University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17055
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pathak, Narendra H. “Molecular characterisation of gen; Molecular characterisation of gene(s) expressped
specifically in snake oocytes.” 1997. Thesis, Jawaharlal Nehru University. Accessed March 03, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/17055.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pathak, Narendra H. “Molecular characterisation of gen; Molecular characterisation of gene(s) expressped
specifically in snake oocytes.” 1997. Web. 03 Mar 2021.
Vancouver:
Pathak NH. Molecular characterisation of gen; Molecular characterisation of gene(s) expressped
specifically in snake oocytes. [Internet] [Thesis]. Jawaharlal Nehru University; 1997. [cited 2021 Mar 03].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17055.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pathak NH. Molecular characterisation of gen; Molecular characterisation of gene(s) expressped
specifically in snake oocytes. [Thesis]. Jawaharlal Nehru University; 1997. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17055
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
15.
Saxena, R C.
Cytological and histo chemical studies on the cortical
zone of oocytes; -.
Degree: Zoology, 1979, INFLIBNET
URL: http://shodhganga.inflibnet.ac.in/handle/10603/38677
None
Bibliography p.165-185
Advisors/Committee Members: Sahai, Y M.
Subjects/Keywords: Cortical; Cytological; Histo Chemical; Oocytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Saxena, R. C. (1979). Cytological and histo chemical studies on the cortical
zone of oocytes; -. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/38677
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Saxena, R C. “Cytological and histo chemical studies on the cortical
zone of oocytes; -.” 1979. Thesis, INFLIBNET. Accessed March 03, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/38677.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Saxena, R C. “Cytological and histo chemical studies on the cortical
zone of oocytes; -.” 1979. Web. 03 Mar 2021.
Vancouver:
Saxena RC. Cytological and histo chemical studies on the cortical
zone of oocytes; -. [Internet] [Thesis]. INFLIBNET; 1979. [cited 2021 Mar 03].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/38677.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Saxena RC. Cytological and histo chemical studies on the cortical
zone of oocytes; -. [Thesis]. INFLIBNET; 1979. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/38677
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Kharya, Vandana.
Role of follicular epithelium in the resorption of
oocytes in some insects; -.
Degree: Zoology, 2002, INFLIBNET
URL: http://shodhganga.inflibnet.ac.in/handle/10603/38138
None
Bibliography p. 142-157
Advisors/Committee Members: Bhide, Mangla.
Subjects/Keywords: Epithelium; Follicular; Insect; Oocytes; Resorption
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kharya, V. (2002). Role of follicular epithelium in the resorption of
oocytes in some insects; -. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/38138
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kharya, Vandana. “Role of follicular epithelium in the resorption of
oocytes in some insects; -.” 2002. Thesis, INFLIBNET. Accessed March 03, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/38138.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kharya, Vandana. “Role of follicular epithelium in the resorption of
oocytes in some insects; -.” 2002. Web. 03 Mar 2021.
Vancouver:
Kharya V. Role of follicular epithelium in the resorption of
oocytes in some insects; -. [Internet] [Thesis]. INFLIBNET; 2002. [cited 2021 Mar 03].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/38138.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kharya V. Role of follicular epithelium in the resorption of
oocytes in some insects; -. [Thesis]. INFLIBNET; 2002. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/38138
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa
17.
Giancarlo Magalhães dos Santos.
Vitrificação de ovócitos imaturos de bovinos.
Degree: 2011, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3801
► Objetivou-se avaliar o efeito de soluções vitrificantes e da vitrificação em ovócitos imaturos bovino. Os ovócitos foram obtidos a partir de ovários coletados de fêmeas…
(more)
▼ Objetivou-se avaliar o efeito de soluções vitrificantes e da vitrificação em ovócitos imaturos bovino. Os ovócitos foram obtidos a partir de ovários coletados de fêmeas bovinas logo após o abate, selecionados morfologicamente e distribuídos de acordo com os tratamentos. O procedimento experimental foi dividido em duas fases. Na primeira fase foi testada a toxicidade de soluções de vitrificação. Na segunda fase, foi testado o efeito da vitrificação. Na primeira fase, os ovócitos foram submetidos à maturação in vitro após manutenção em diferentes soluções de vitrificação (61 tratamentos). Foram testadas soluções de equilíbrio (SE) de 3, 8, 16, 20, 32 e 40% de Etilenoglicol (EG) em tempos (TE) de 1, 2, 4, 5, 6, 8 e 10 minutos e posteriormente mantidos por 1 minuto em solução de vitrificação (SV) contendo 40% de EG e 1,0 mol.L-1 de sacarose. O mesmo procedimento foi realizado, porém, utilizando solução de vitrificação contendo 25% de EG, 25% de DMSO e 1,0 mol.L-1 de sacarose. Após estes procedimentos, os ovócitos foram reidratados e submetidos ao cultivo in vitro por 24 horas. Observou-se maturação nuclear em grande parte dos tratamentos com exceção das combinações de SE com 32 e 40% de EG nos diferentes TE. Da mesma forma, os ovócitos expostos à SV de 25% de EG + 25% de DMSO + 1 mol.L-1 de sacarose não possibilitaram a maturação. Os melhores resultados foram as soluções de SE contendo 3%, 16%, expostas por cinco minutos e 20% de EG, expostas por 10 minutos (76,7, 57,1 e 66,7% de ovócitos em metáfase II, respectivamente). Todos estes tratamentos foram expostos ao final do equilíbrio à SV, contendo 40% de EG + 1,0 mol.L-1 de sacarose. Na segunda etapa, ovócitos foram submetidos aos procedimentos conforme descrito na primeira fase. Foram testadas SE com 3% de EG (por 1, 5, 6, 8, e 10 minutos), 8% de EG (por 1, 5 e 10 minutos), 16 e 20% de EG (por 5 e 8 minutos). Posteriormente, os ovócitos foram mantidos por 1 minuto em SV contendo 40% de EG e 1,0 mol.L-1 de sacarose. Posteriormente, os ovócitos foram envasados em palhetas de 0,25 mL, vitrificados (imersos em nitrogênio líquido) e posteriormente desvitrificados, rehidratados e submetidos à maturação in vitro por 24 horas. Observou-se que as combinações SE com 3% de EG, com TE de 1, 5, 6, 8 e 10 minutos proporcionaram taxas de metáfase II de 10,4; 19,3; 10,0; 7,6 e 14,3% respectivamente. As combinações SE com 8% de EG, com TE de 1, 5 e 10, e SE com 16% de EG, com TE de 5 minutos e SE de 20% de EG, com TE de 8 minutos proporcionaram taxas de metáfase II de 12,9; 6,9; 2,4; 23,1 e 2,0% respectivamente, sendo que todas diferem (P<0,05) ao grupo testemunha (73,7%). Foram processados ovócitos para a avaliação da ultraestrutura e expressão gênica. A ultraestrutura indicou que ovócitos de todos os tratamentos testados (exceto o grupo testemunha) apresentavam organelas degeneradas. Adicionalmente, não foi observada a distribuição citoplasmática típica de mitocôndrias de um ovócito maduro. Já na expressão gênica observou-se que ovócitos expostos a solução de equilíbrio de 16% de EG…
Advisors/Committee Members: Carlos Antônio de Carvalho Fernandes, Tarcízio Antônio Rego de Paula, Luiz Sergio de Almeida Camargo, João Henrique Moreira Viana, Claudio José Borela Espeschit, Laércio dos Anjos Benjamin, Giuliano Moraes Figueiró, Eduardo Paulino da Costa.
Subjects/Keywords: Vitrificação; Oocytes; Bovine; Vitrification; REPRODUCAO ANIMAL; Ovócitos; Bovinos
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Santos, G. M. d. (2011). Vitrificação de ovócitos imaturos de bovinos. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3801
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Santos, Giancarlo Magalhães dos. “Vitrificação de ovócitos imaturos de bovinos.” 2011. Thesis, Universidade Federal de Viçosa. Accessed March 03, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3801.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Santos, Giancarlo Magalhães dos. “Vitrificação de ovócitos imaturos de bovinos.” 2011. Web. 03 Mar 2021.
Vancouver:
Santos GMd. Vitrificação de ovócitos imaturos de bovinos. [Internet] [Thesis]. Universidade Federal de Viçosa; 2011. [cited 2021 Mar 03].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3801.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Santos GMd. Vitrificação de ovócitos imaturos de bovinos. [Thesis]. Universidade Federal de Viçosa; 2011. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3801
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa
18.
Gustavo Bruno Mota.
Desenvolvimento e expressão gênica em oócitos bovinos imaturos selecionados por Azul Cresil Brilhante.
Degree: 2008, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1345
► The in vitro embryo production (IVP) efficiency has been limited by oocyte developmental competence and in vitro culture conditions. The use of Brilliant Cresyl Blue…
(more)
▼ The in vitro embryo production (IVP) efficiency has been limited by oocyte developmental competence and in vitro culture conditions. The use of Brilliant Cresyl Blue (BCB) dye has been described as an alternative method for selection of better quality oocytes. The aim of this work was to evaluate the selection of immature oocytes by BCB dye and the expression of transcripts involved in the transition from genome-maternal. In the first step, a total of 998 immature oocytes was distributed into: G1- Control: oocytes sent directly to in vitro maturation, not exposed to the dye; G2- Control incubation (mPBS): oocytes exposed to mPBS solution without BCB for 1h; G3- BCB+: oocytes exposed to mPBS added of BCB and positively stained; G4- BCB-: oocytes exposed to mPBS with BCB and colorless. Oocytes of each treatment were matured, fertilized and presumptive zygotes were cultured in vitro for eight days. The rates of cleavage were obtained at 48h after the beginning of the culture and the rates of blastocysts at eight days post fertilization. The cleavage rates between G1 and G3 were similar, but higher than G2 and G4, the ones which similar. The oocytes in G3 showed blastocyst rate similar to the G1 and G2, but higher than G4. In another step, total RNA was extracted from three pools of 12 immature oocytes obtained from each group and used to generate cDNA. The relative abundance of MATER and Zar-1 transcripts was analyzed by Real Time PCR. No difference was found on relative expression for MATER and Zar-1 among groups. In conclusion, the conventional morphologic selection associated to the selection by BCB dye can be used as method of selection of immature oocyte, distinguishing two oocytes populations with different development competence, however this double selection did not select more competent oocytes when used only the conventional morphologic assessment. Moreover, the dye is not able to select oocytes with different patterns of expression transcripts MATER and Zar-1.
A eficiência da produção in vitro de embriões (PIV) tem sido limitada pelas condições de cultivo in vitro e baixa competência dos oócitos utilizados na maturação in vitro. A utilização do corante Azul Cresil Brilhante (ACB) associado à seleção morfológica convencional, tem sido descrita como uma alternativa para seleção de oócitos de melhor qualidade. Objetivou-se neste trabalho avaliar o uso do ACB como método de seleção de oócitos imaturos bovinos, utilizando como parâmetros de avaliação o desenvolvimento embrionário e a expressão de genes envolvidos na transição do genoma materno-zigótica. Na primeira etapa, um total de 998 oócitos foram distribuídos em 4 grupos: G1-Controle: oócitos submetidos à maturação sem exposição ao corante ; G2- Controle de incubação (mPBS): oócitos mantidos em mPBS por 1h a temperatura de 38,5 C em ar atmosférico; G3-ACB+: oócitos mantidos em mPBS adicionado de ACB, nas mesmas condições de G2, que apresentaram ao final da incubação citoplasma corado; G4- ACB-: oócitos mantidos em mPBS adicionado de ACB nas mesma condições…
Advisors/Committee Members: Ciro Alexandre Alves Torres, Eduardo Paulino da Costa, Giovanni Ribeiro de Carvalho, João Henrique Moreira Viana, Luiz Sergio de Almeida Camargo.
Subjects/Keywords: Oócito; Expressão gênica; ACB; PRODUCAO ANIMAL; Oocytes; Gene expression; BCB
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mota, G. B. (2008). Desenvolvimento e expressão gênica em oócitos bovinos imaturos selecionados por Azul Cresil Brilhante. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1345
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mota, Gustavo Bruno. “Desenvolvimento e expressão gênica em oócitos bovinos imaturos selecionados por Azul Cresil Brilhante.” 2008. Thesis, Universidade Federal de Viçosa. Accessed March 03, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1345.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mota, Gustavo Bruno. “Desenvolvimento e expressão gênica em oócitos bovinos imaturos selecionados por Azul Cresil Brilhante.” 2008. Web. 03 Mar 2021.
Vancouver:
Mota GB. Desenvolvimento e expressão gênica em oócitos bovinos imaturos selecionados por Azul Cresil Brilhante. [Internet] [Thesis]. Universidade Federal de Viçosa; 2008. [cited 2021 Mar 03].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1345.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mota GB. Desenvolvimento e expressão gênica em oócitos bovinos imaturos selecionados por Azul Cresil Brilhante. [Thesis]. Universidade Federal de Viçosa; 2008. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1345
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Texas Southwestern Medical Center
19.
Evaul, Kristen Elizabeth.
Gonadotropin-induced Steroidogenesis and Downstream Signals Leading to Oocyte Maturation.
Degree: 2009, University of Texas Southwestern Medical Center
URL: http://hdl.handle.net/2152.5/639
► The Hammes laboratory is interested in understanding the process of steroid-mediated oocyte maturation. This includes examining both steroid production and steroid signaling. In these studies,…
(more)
▼ The Hammes laboratory is interested in understanding the process of steroid-mediated oocyte maturation. This includes examining both steroid production and steroid signaling. In these studies, gonadotropin-induced steroid production was examined in the gonads using mouse models, as well as steroid-induced oocyte maturation in frog models. cAMP signaling is known to be important for steroid production, but further downstream pathways were not well characterized. These studies illuminate other downstream signaling pathways triggered by luteinizing hormone (LH) that regulate steroid production in the testes using Leydig cells, which are the primary steroidogenic cells in the testes. A novel downstream pathway was found involving epidermal growth factor receptor (EGFR) transactivation, downstream mitogen-activated protein kinase (MAPK) and steroidogenic acute regulatory protein (StAR) activation that was essential for short, but not long-term LH-induced steroidogenesis in MLTC-1 and primary mouse leydig cells. Despite this discrepancy in vitro, EGFR signaling was required in vivo for testicular testosterone production. To study the effects of steroids on oocyte maturation, the Xenopus laevis frog model was used. It has been shown that G-beta gamma, as well as other signals, keep the oocyte in meiotic arrest. Steroids block this constitutive signal, leading to oocyte maturation. To directly measure rapid changes in G-beta gamma signaling in
oocytes, G-beta gamma sensitive-inward rectifying potassium channel currents (GIRKS) were exogenously expressed in Xenopus
oocytes. Adding testosterone, the physiologic mediator of oocyte maturation in Xenopus, decreased the G-beta gamma mediated signal. This happened rapidly supporting the well known idea that maturation is a transcription-independent process. It was also seen that the classical androgen receptor (AR) was being used for this process. When the AR was knocked down, testosterone could only decrease GIRK signal at higher concentrations. This showed that testosterone is working, at least partially, through the AR. These studies may help elucidate novel targets for polycystic ovary syndrome (PCOS), which is characterized by excess androgen due to improper steroid production.
Advisors/Committee Members: Hammes, Stephen R..
Subjects/Keywords: Oocytes; Receptors, Steroid; Testosterone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Evaul, K. E. (2009). Gonadotropin-induced Steroidogenesis and Downstream Signals Leading to Oocyte Maturation. (Thesis). University of Texas Southwestern Medical Center. Retrieved from http://hdl.handle.net/2152.5/639
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Evaul, Kristen Elizabeth. “Gonadotropin-induced Steroidogenesis and Downstream Signals Leading to Oocyte Maturation.” 2009. Thesis, University of Texas Southwestern Medical Center. Accessed March 03, 2021.
http://hdl.handle.net/2152.5/639.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Evaul, Kristen Elizabeth. “Gonadotropin-induced Steroidogenesis and Downstream Signals Leading to Oocyte Maturation.” 2009. Web. 03 Mar 2021.
Vancouver:
Evaul KE. Gonadotropin-induced Steroidogenesis and Downstream Signals Leading to Oocyte Maturation. [Internet] [Thesis]. University of Texas Southwestern Medical Center; 2009. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/2152.5/639.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Evaul KE. Gonadotropin-induced Steroidogenesis and Downstream Signals Leading to Oocyte Maturation. [Thesis]. University of Texas Southwestern Medical Center; 2009. Available from: http://hdl.handle.net/2152.5/639
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Newcastle
20.
Lane, Simon I. R.
Control of chromosome segregation in mouse oocytes.
Degree: PhD, 2012, University of Newcastle
URL: http://hdl.handle.net/1959.13/932161
► Research Doctorate - Doctor of Philosophy (PhD)
This thesis explores the first meiotic division in mouse oocytes, using imaging of fluorescent chimeras by confocal and…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
This thesis explores the first meiotic division in mouse oocytes, using imaging of fluorescent chimeras by confocal and epifluorescence microscopy in real time and of fixed specimens following immunocytochemistry. The activities of the spindle assembly checkpoint (SAC) and the anaphase promoting complex (APC) are examined with respect to the timing of germinal vesicle breakdown, spindle formation, chromosome alignment, and polar body extrusion. The activation of the APC, an event that in mitosis is prevented until proper attachment of all chromosomes is achieved, is shown not to be strictly coupled to bivalent alignment in prometaphase I. Instead the metaphase to anaphase transition is begun following the attachment of the majority of kinetochores and is characterised by sub-optimal activity of the APC. It is shown that this uncoupling of the SAC and chromosome alignment has the potential to generate aneuploidy. These findings have implications for the high aneuploidy rates deriving from the first meiotic division, which are often responsible for miscarriage in humans.
Advisors/Committee Members: University of Newcastle. Faculty of Health, School of Biomedical Science and Pharmacy.
Subjects/Keywords: mice; meiosis I; oocytes; aneuploidy; anaphase promoting complex; spindle assembly checkpoint
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lane, S. I. R. (2012). Control of chromosome segregation in mouse oocytes. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/932161
Chicago Manual of Style (16th Edition):
Lane, Simon I R. “Control of chromosome segregation in mouse oocytes.” 2012. Doctoral Dissertation, University of Newcastle. Accessed March 03, 2021.
http://hdl.handle.net/1959.13/932161.
MLA Handbook (7th Edition):
Lane, Simon I R. “Control of chromosome segregation in mouse oocytes.” 2012. Web. 03 Mar 2021.
Vancouver:
Lane SIR. Control of chromosome segregation in mouse oocytes. [Internet] [Doctoral dissertation]. University of Newcastle; 2012. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/1959.13/932161.
Council of Science Editors:
Lane SIR. Control of chromosome segregation in mouse oocytes. [Doctoral Dissertation]. University of Newcastle; 2012. Available from: http://hdl.handle.net/1959.13/932161

University of South Carolina
21.
Kordus, Richard John.
Using Human Granulosa Cells to Select the Most Competent Embryos for Uterine Transfer in in Vitro Fertilization Cycles.
Degree: PhD, Biomedical Engineering, 2020, University of South Carolina
URL: https://scholarcommons.sc.edu/etd/5675
► Infertility is a worldwide epidemic often treated with in vitro fertilization. The success of in vitro fertilization is directly dependent upon the quality of…
(more)
▼ Infertility is a worldwide epidemic often treated with in vitro fertilization. The success of in vitro fertilization is directly dependent upon the quality of
oocytes produced during the controlled stimulation of the patient’s ovaries. There is a need for improved methods to allow embryologists to select the most viable embryos with the highest probability of leading to live births since in vitro fertilization success is far from optimal.
Oocyte and subsequent embryo quality are intimately influenced by the granulosa cells which surround the oocyte during follicular maturation. The
oocytes require proper signaling and energy production form the surrounding granulosa cells for ideal maturation which will allow the oocyte to fertilize and produce a viable embryo. We hypothesize that mRNA levels of certain genes in granulosa cells will allow for the identification
oocytes that will produce euploid embryos and the most viable embryos within a cohort. Secondly, we hypothesize that the rate by which mitochondria from granulosa cells are able to utilize certain metabolic substrates will be able to identify patients that have increased probability of producing high quality embryos leading to live births.
This dissertation attempts to identify a group of genes within individual cumulus cells that show differential mRNA gene expression between
oocytes of euploid embryos and
oocytes leading to live birth compared to
oocytes that do not. From these genes we further attempt to create a model using multiple genes to identify the most viable
oocytes within a cohort. This dissertation also attempts to identify metabolic substrates differentially utilized by granulosa cell mitochondria based on patient demographics or embryo development and determine if individual substrates can be used as mitochondrial biomarkers for assisted reproduction. As a whole, the work in this dissertation seeks to provide a panel of biomarkers that can be used by clinicians to better identify embryos that will help improve overall assisted reproductive success.
Advisors/Committee Members: Holly LaVoie.
Subjects/Keywords: Biomedical Engineering and Bioengineering; Infertility; in vitro fertilization; oocytes; embryologists
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kordus, R. J. (2020). Using Human Granulosa Cells to Select the Most Competent Embryos for Uterine Transfer in in Vitro Fertilization Cycles. (Doctoral Dissertation). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/5675
Chicago Manual of Style (16th Edition):
Kordus, Richard John. “Using Human Granulosa Cells to Select the Most Competent Embryos for Uterine Transfer in in Vitro Fertilization Cycles.” 2020. Doctoral Dissertation, University of South Carolina. Accessed March 03, 2021.
https://scholarcommons.sc.edu/etd/5675.
MLA Handbook (7th Edition):
Kordus, Richard John. “Using Human Granulosa Cells to Select the Most Competent Embryos for Uterine Transfer in in Vitro Fertilization Cycles.” 2020. Web. 03 Mar 2021.
Vancouver:
Kordus RJ. Using Human Granulosa Cells to Select the Most Competent Embryos for Uterine Transfer in in Vitro Fertilization Cycles. [Internet] [Doctoral dissertation]. University of South Carolina; 2020. [cited 2021 Mar 03].
Available from: https://scholarcommons.sc.edu/etd/5675.
Council of Science Editors:
Kordus RJ. Using Human Granulosa Cells to Select the Most Competent Embryos for Uterine Transfer in in Vitro Fertilization Cycles. [Doctoral Dissertation]. University of South Carolina; 2020. Available from: https://scholarcommons.sc.edu/etd/5675

University of Texas Southwestern Medical Center
22.
Young, Melissa Rasar.
Paxillin is a Novel Regulator of Xenopus Oocyte Maturation.
Degree: 2010, University of Texas Southwestern Medical Center
URL: http://hdl.handle.net/2152.5/786
► Oocyte maturation is triggered by steroids in a transcription-independent fashion that involves an unusual positive feedback loop whereby MOS (a germ cell specific Raf) activates…
(more)
▼ Oocyte maturation is triggered by steroids in a transcription-independent fashion that involves an unusual positive feedback loop whereby MOS (a germ cell specific Raf) activates MEK1, which in turn activates ERK2. ERK2 then acts back on MOS to enhance its expression resulting in amplification of the kinase signaling cascade. To date, little is known regarding other factors that regulate this powerful feedback kinase cascade. Here we present the scaffolding molecule, Paxillin, as a newly recognized essential regulator of meiosis in Xenopus leavis
oocytes. Reduction of Paxillin expression using RNA interference and antisense oligonucleotides completely abrogates steroid-triggered meiotic resumption. Detailed signaling studies reveal that Paxillin is acting early in the kinase cascade, as it is required for accumulation of MOS protein and complete activation of downstream kinase signaling in response to steroids. Surprisingly, full Paxillin activity also requires serine phosphorylation by a kinase downstream of MOS and MEK1, possibly ERK2. Together, these data suggest that Paxillin is an important regulator of the positive feedback effects of MEK/ERK signaling on MOS protein expression. The ability of Paxillin to function as a MAPK scaffold was analyzed, revealing Paxillin can interact with MOS in mammalian cells. Furthermore, the ability of Paxillin to regulate activity of proteins important for translation, specifically polyadenylation binding proteins, is briefly explored. In all, these experiments reveal a novel and critical function for Paxillin in meiosis, and support the notion that Paxillin may be general modulator of MAPK signaling and/or mRNA translation by polyadenylation binding proteins.
Advisors/Committee Members: Hammes, Stephen R..
Subjects/Keywords: Oocytes; Paxillin; Gene Expression Regulation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Young, M. R. (2010). Paxillin is a Novel Regulator of Xenopus Oocyte Maturation. (Thesis). University of Texas Southwestern Medical Center. Retrieved from http://hdl.handle.net/2152.5/786
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Young, Melissa Rasar. “Paxillin is a Novel Regulator of Xenopus Oocyte Maturation.” 2010. Thesis, University of Texas Southwestern Medical Center. Accessed March 03, 2021.
http://hdl.handle.net/2152.5/786.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Young, Melissa Rasar. “Paxillin is a Novel Regulator of Xenopus Oocyte Maturation.” 2010. Web. 03 Mar 2021.
Vancouver:
Young MR. Paxillin is a Novel Regulator of Xenopus Oocyte Maturation. [Internet] [Thesis]. University of Texas Southwestern Medical Center; 2010. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/2152.5/786.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Young MR. Paxillin is a Novel Regulator of Xenopus Oocyte Maturation. [Thesis]. University of Texas Southwestern Medical Center; 2010. Available from: http://hdl.handle.net/2152.5/786
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Uppsala University
23.
Ekberg, Sara.
Cryopreservation of Oocytes : Comparison between the Cryoloop and the Cryopette vitrification techniques.
Degree: Medical Biochemistry and Microbiology, 2010, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125951
► Crypreservation of oocytes is recently being considered to be a valid choice in infertility treatments.Low survival and fertilization rates due to inefficient slow freeze…
(more)
▼ Crypreservation of oocytes is recently being considered to be a valid choice in infertility treatments.Low survival and fertilization rates due to inefficient slow freeze protocols have been the outcome ofmany previous studies done in the field. However, introduction of the vitrification technique and itsapplication in reproductive medicine and to some extent new improved slow freeze protocols haveshown that oocytes can be cryopreserved with successful outcome.
In this project the survival rate of oocytes after vitrification with MediCult Vitrification andWarming Media has been studied. Also, a comparison of the carriers Cryoloop (an open system) andCryopette (a closed system) has been performed.
A total of 43 oocytes were vitrified and warmed according to MediCult's protocol, of which 21oocytes with Cryoloop and 22 with Cryopette. The cells were post-thaw incubated in a physiologicalenvironment for 24h. During that time the morphology and viability were observed and noted after 2h,over night and after 24h. No significant difference in survival rates of the oocytes' was observed usingthe two carriers, and the total survival rate of the oocytes was 83.7%. This indicates thatcryopreservation of oocytes is a valid choice in fertility treatments and that the new product Cryopettecan be used clinically with just as good results as the well established Cryoloop technique. This merits further studies on the applicability of vitrification on oocytes and the Cryopette technique.
Subjects/Keywords: Oocytes; cryopreservation; vitrification; Cryoloop; Cryopette
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ekberg, S. (2010). Cryopreservation of Oocytes : Comparison between the Cryoloop and the Cryopette vitrification techniques. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125951
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ekberg, Sara. “Cryopreservation of Oocytes : Comparison between the Cryoloop and the Cryopette vitrification techniques.” 2010. Thesis, Uppsala University. Accessed March 03, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125951.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ekberg, Sara. “Cryopreservation of Oocytes : Comparison between the Cryoloop and the Cryopette vitrification techniques.” 2010. Web. 03 Mar 2021.
Vancouver:
Ekberg S. Cryopreservation of Oocytes : Comparison between the Cryoloop and the Cryopette vitrification techniques. [Internet] [Thesis]. Uppsala University; 2010. [cited 2021 Mar 03].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125951.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ekberg S. Cryopreservation of Oocytes : Comparison between the Cryoloop and the Cryopette vitrification techniques. [Thesis]. Uppsala University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125951
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
24.
Jiménez Trigos, María Estrella.
Generation of offspring from cryopreserved rabbit (Oryctolagus cuniculus) oocytes
.
Degree: 2014, Universitat Politècnica de València
URL: http://hdl.handle.net/10251/37977
► The general aim of this thesis was to optimise the current methodologies of oocyte cryopreservation in order to obtain live offspring from cryopreserved rabbit oocytes.…
(more)
▼ The general aim of this thesis was to optimise the current methodologies of
oocyte cryopreservation in order to obtain live offspring from cryopreserved
rabbit
oocytes.
In chapter 1, meiotic spindle configuration, cortical granules (CGs) distribution
and oocyte developmental competence were evaluated after
cryopreservation with the current slow-freezing and vitrification procedures. The
meiotic spindle organisation was dramatically impaired regardless of the
method used. Nevertheless, altered CG distribution is more evident in vitrified
oocytes than in slow-frozen ones and the developmental rate to blastocyst
stage after parthenogenetic activation was only obtained using slow-freezing
method. From this chapter it may be concluded that both methodologies
equally affect oocyte structure. However, slow-freezing method seems to be
the recommended option for this species as a consequence of the sensitivity to
high levels of cryoprotectants in this species.
The aim of the following two chapters was the optimisation of cryopreservation
procedures using different strategies to modify the
oocytes in order to make
them more cryoresistant.
In chapter 2, Taxol and Cytochalasin B were employed to stabilise the
cytoskeleton system during vitrification. The effect of these two molecules on
the meiotic spindle and chromosome configuration and development to
blastocyst stage after parthenogenesis activation were also evaluated. There
were no significant differences in the structural configuration between vitrified
groups. Regarding cleavage and blastocyst developmental rate, no statistical differences were found between vitrified-non-treated and Taxol-treated
oocytes, but no
oocytes treated with Cytochalasin B reached this stage.
Therefore, structural configuration and blastocyst development were not
improved by this pre-treatment. Moreover, Cytochalasin B pre-treatment seems
to cause a deleterious effect on developmental ability to blastocyst stage of
these
oocytes.
In chapter 3,
oocytes were incubated with cholesterol-loaded methyl-ß-
cyclodextrin (CLC) to increase the membrane fluidity and stability and improve
their developmental ability after parthenogenetic activation or
intracytoplasmic sperm injection (ICSI). Cholesterol incorporation and its
presence after cryopreservation were evaluated using confocal microscopy.
Results showed that cholesterol was incorporated into the oocyte and
remained, albeit in a lesser amount after cryopreservation procedures.
However, no improvements on developmental competence were obtained
after parthenogenetic activation or intracytoplasmic sperm injection.
In the last three chapters of this thesis, the main objective was to develop a
reliable technique which would allow us to obtain live offspring from
cryopreserved
oocytes. For that purpose, in vivo fertilisation using intraoviductal
oocyte transfer assisted by laparoscopy was considered a good alternative to
bypass the inadequacy of conventional in vitro…
Advisors/Committee Members: Marco Jiménez, Francisco (advisor), Vicente Antón, José Salvador (advisor).
Subjects/Keywords: Cryopreservation;
Vitrification;
Slow-freezing;
Oocytes;
Rabbit;
Offspring;
In vivo fertilisation;
Laparoscopy
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jiménez Trigos, M. E. (2014). Generation of offspring from cryopreserved rabbit (Oryctolagus cuniculus) oocytes
. (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/37977
Chicago Manual of Style (16th Edition):
Jiménez Trigos, María Estrella. “Generation of offspring from cryopreserved rabbit (Oryctolagus cuniculus) oocytes
.” 2014. Doctoral Dissertation, Universitat Politècnica de València. Accessed March 03, 2021.
http://hdl.handle.net/10251/37977.
MLA Handbook (7th Edition):
Jiménez Trigos, María Estrella. “Generation of offspring from cryopreserved rabbit (Oryctolagus cuniculus) oocytes
.” 2014. Web. 03 Mar 2021.
Vancouver:
Jiménez Trigos ME. Generation of offspring from cryopreserved rabbit (Oryctolagus cuniculus) oocytes
. [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2014. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/10251/37977.
Council of Science Editors:
Jiménez Trigos ME. Generation of offspring from cryopreserved rabbit (Oryctolagus cuniculus) oocytes
. [Doctoral Dissertation]. Universitat Politècnica de València; 2014. Available from: http://hdl.handle.net/10251/37977

University of Minnesota
25.
Olker, Jennifer.
Effects of atrazine and climate change on amphibian larval development and growth.
Degree: PhD, Integrated Biosciences, 2014, University of Minnesota
URL: http://hdl.handle.net/11299/191478
► The distribution and population persistence of many North American amphibians depends on environmental factors at multiple spatial scales. Anthropogenic and naturally occurring stressors, including contaminants,…
(more)
▼ The distribution and population persistence of many North American amphibians depends on environmental factors at multiple spatial scales. Anthropogenic and naturally occurring stressors, including contaminants, predators, and pond-drying, have been shown to affect amphibian growth, development, and health. The herbicide atrazine (2-chloro-4-ethylamino-6-isoproyl-amino-s-triazine) is a widely used pesticide in the U.S., and in some amphibians has been shown to reduce size and health at metamorphosis and alter gonadal function, presumably through endocrine disruption. Environmental changes predicted by climate models could exacerbate these impacts, as well as directly affect amphibian development and population persistence through accelerated pond-drying and habitat loss or modification. Objectives of this project were to: 1) Quantify developmental responses to the combined effects of atrazine exposure and accelerated pond-drying rates; and 2) Quantify potential effects of these and other environmental stressors on amphibian occurrence and health. Growth, development, and physiological state (skeletal/eye malformations and gonadal development) were assessed in northern leopard frog (Rana pipiens) and wood frog (Rana sylvatica) in experimental exposures and field surveys in the U.S. Prairie Pothole Region across a range of environmentally relevant atrazine concentrations (0.1, 20, and 200 μg/L) and in combination with climate change and other environmental factors suspected to affect amphibian larval development. Atrazine exposure during larval development decreased survival and had sub-lethal impacts on growth and development, which could negatively impact populations by reducing annual recruitment and survival of juveniles. Presence, abundance, and severity of testicular oocytes (TOs) did not appear to be related to atrazine exposure in experimental or field specimens; however, TO prevalence differed greatly between species (>40% in R. pipiens and <5% in R. sylvatica). These results suggest that TOs are not likely due solely to endocrine disruption by atrazine and more research is needed to understand reproductive or population-level impacts of TOs. Amphibian metrics (presence, breeding, skeletal malformations, and TOs) responded differently to environmental variables from wetland, local, and landscape scales, and amphibian breeding (presence or success) was identified as a better indicator of environmental condition than species presence, calling, or TOs.
Subjects/Keywords: anurans; atrazine; mesocosms; Prairie Pothole Region; testicular oocytes; wetlands
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Olker, J. (2014). Effects of atrazine and climate change on amphibian larval development and growth. (Doctoral Dissertation). University of Minnesota. Retrieved from http://hdl.handle.net/11299/191478
Chicago Manual of Style (16th Edition):
Olker, Jennifer. “Effects of atrazine and climate change on amphibian larval development and growth.” 2014. Doctoral Dissertation, University of Minnesota. Accessed March 03, 2021.
http://hdl.handle.net/11299/191478.
MLA Handbook (7th Edition):
Olker, Jennifer. “Effects of atrazine and climate change on amphibian larval development and growth.” 2014. Web. 03 Mar 2021.
Vancouver:
Olker J. Effects of atrazine and climate change on amphibian larval development and growth. [Internet] [Doctoral dissertation]. University of Minnesota; 2014. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/11299/191478.
Council of Science Editors:
Olker J. Effects of atrazine and climate change on amphibian larval development and growth. [Doctoral Dissertation]. University of Minnesota; 2014. Available from: http://hdl.handle.net/11299/191478

University of Southern California
26.
Popova, Maya S.
Sites of ethanol action in P2X4 receptors.
Degree: PhD, Pharmaceutical Sciences, 2011, University of Southern California
URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/654259/rec/5878
► P2X receptors (P2XRs) are a distinct family of ligand-gated ion channels that are widely found throughout the peripheral and central nervous systems. They are fast…
(more)
▼ P2X receptors (P2XRs) are a distinct family of
ligand-gated ion channels that are widely found throughout the
peripheral and central nervous systems. They are fast acting,
cation-permeable ligand gated ion channels that are gated by
synaptically released extracellular ATP. P2X4Rs are the most
abundant P2XR subtype expressed in the CNS and the most ethanol
sensitive P2X subtype identified to date. Recent findings suggested
that P2X4Rs may play a role in alcohol intake and preference in
rats. Although, a growing body of evidence suggests a role for
P2XRs in ethanol modulation, the sites responsible for the action
of ethanol in these receptors are just beginning to be studied and
remain unresolved. The present dissertation addresses this issue by
using electrophysiology, molecular biology and molecular modeling
strategies to identify ethanol sensitive molecular sites in these
receptors. This dissertation sets three interrelated hypothesis
build on each other: 1) Chapter 2 tests the hypothesis that the
ectodomain-TM interface contains residues that are important for
the action of ethanol in P2X4Rs; 2) Chapter 3 tests the hypothesis
that Trp46 plays a role in ethanol and/or IVM modulation and 3)
Chapter 4 tests the hypothesis that residues within the TM1 domain
(residues 29 to 49) are important for the action of ethanol in
P2X4Rs. The findings identified several ethanol sensitive amino
acid residues and support the notion that there are multiple sites
for ethanol action in P2X4Rs. In addition these studies increased
our understanding of the sites and mechanisms of agonist
transduction in P2X4Rs. Overall, the findings significantly add to
our knowledge regarding the molecular sites for ethanol action in
P2X4Rs and suggest possible targets for drug development to prevent
or treat ethanol abuse and dependence.
Advisors/Committee Members: Davies, Daryl L.Alkana, Ronald L. (Committee Chair), Petasis, Nicos A. (Committee Member).
Subjects/Keywords: alcohol; electrophysiology; ion channels; purinergic P2X4 receptors; xenopus oocytes ❧
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Popova, M. S. (2011). Sites of ethanol action in P2X4 receptors. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/654259/rec/5878
Chicago Manual of Style (16th Edition):
Popova, Maya S. “Sites of ethanol action in P2X4 receptors.” 2011. Doctoral Dissertation, University of Southern California. Accessed March 03, 2021.
http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/654259/rec/5878.
MLA Handbook (7th Edition):
Popova, Maya S. “Sites of ethanol action in P2X4 receptors.” 2011. Web. 03 Mar 2021.
Vancouver:
Popova MS. Sites of ethanol action in P2X4 receptors. [Internet] [Doctoral dissertation]. University of Southern California; 2011. [cited 2021 Mar 03].
Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/654259/rec/5878.
Council of Science Editors:
Popova MS. Sites of ethanol action in P2X4 receptors. [Doctoral Dissertation]. University of Southern California; 2011. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll127/id/654259/rec/5878
27.
Guglielmino, Maria Rosa.
Studio di macchinari molecolari in ovociti umani.
Degree: 2011, Università degli Studi di Catania
URL: http://hdl.handle.net/10761/128
► Il lavoro presentato in questa tesi ha come oggetto di studio il gamete femminile ed in particolare il trascrittoma dell'ovocita umano. All'interno di questa linea…
(more)
▼ Il lavoro presentato in questa tesi ha come oggetto di studio il gamete femminile ed in particolare il trascrittoma dell'ovocita umano.
All'interno di questa linea di ricerca abbiamo:
Caratterizzato il TFIID [1, 2] in condizioni non patologiche per ricercare marcatori molecolari da correlare alla qualita' ovocitaria [3];
Valutato il profilo di espressione dei geni codificanti le proteine del macchinario apoptotico [4] durante l ' invecchiamento riproduttivo;
Valutato la qualita' ovocitaria in risposta a specifici protocolli di congelamento (Vitrificazione) [5].
The aim of my PhD thesis was the study of human female germ cells, particularly the transcriptome of mature oocyte.
I reported the summary of the obtained results:
Characterization of human TFIID in single oocytes in non pathological conditions: new potential molecular markers of oocyte quality;
Expression profile of apoptotic machinery genes in human mature oocyte and in cumulus cells in relation to maternal age: molecular basis of competence decrease;
Molecular profiling of human oocytes after vitrification.
Subjects/Keywords: Human oocytes; Gene expression; Molecular machinery; Molecular markers
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Guglielmino, M. R. (2011). Studio di macchinari molecolari in ovociti umani. (Thesis). Università degli Studi di Catania. Retrieved from http://hdl.handle.net/10761/128
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Guglielmino, Maria Rosa. “Studio di macchinari molecolari in ovociti umani.” 2011. Thesis, Università degli Studi di Catania. Accessed March 03, 2021.
http://hdl.handle.net/10761/128.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Guglielmino, Maria Rosa. “Studio di macchinari molecolari in ovociti umani.” 2011. Web. 03 Mar 2021.
Vancouver:
Guglielmino MR. Studio di macchinari molecolari in ovociti umani. [Internet] [Thesis]. Università degli Studi di Catania; 2011. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/10761/128.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Guglielmino MR. Studio di macchinari molecolari in ovociti umani. [Thesis]. Università degli Studi di Catania; 2011. Available from: http://hdl.handle.net/10761/128
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh
28.
Zhaunova, Liudmila.
Regulation of oocyte-specific chromatin organisation during prophase I by the histone demethylase Kdm5/Lid and other proteins.
Degree: PhD, 2017, University of Edinburgh
URL: http://hdl.handle.net/1842/29007
► In Drosophila oocytes, chromosomes undergo dynamic reorganisation during the prophase of the first meiotic division. This is essential to prepare chromatin for synapsis, recombination and…
(more)
▼ In Drosophila oocytes, chromosomes undergo dynamic reorganisation during the prophase of the first meiotic division. This is essential to prepare chromatin for synapsis, recombination and consequent chromosome segregation. The progression of meiotic prophase I is well described, while the molecular mechanisms and regulation of these dramatic chromosomal reorganisations are not well understood. Histone modifying enzymes are major regulators of chromatin structure, however, our knowledge of their roles in meiotic prophase I is still limited. In this work, I investigated the role of the histone demethylase Kdm5/Lid, which removes one of the trimethyl groups at Lys4 of Histone 3 (H3K4me3). I showed that Kdm5/Lid is important for the assembly of the synaptonemal complex, pairing of homologous centromeres, and the karyosome formation. Additionally, Kdm5/Lid promotes crossing over and therefore ensures accurate chromosome segregation. Although loss of Kdm5/Lid dramatically increased the level of H3K4me3 in oocytes, catalytically inactive Kdm5/Lid rescued the above cytological defects. Thereby, I found that Kdm5/Lid regulates chromatin architecture in meiotic prophase I oocytes independently of its demethylase activity. To further identify the regulators of meiotic chromatin organisation during prophase I, I carried out a small-scale RNAi screen for karyosome defects. I found that depletion of ubiquitin ligase components, SkpA, Cul-3 and Ubc-6, disrupted the karyosome formation and the assembly of the synaptonemal complex. The success of the small-scale screen motivated me to initiate the genome-scale RNAi screen for karyosome defects. I found 40 new genes that, when depleted, strongly impaired karyosome morphology. Further studies are required to confirm and elucidate their role in chromatin organisation in oocytes. Overall, my findings have advanced our understanding of the regulation of chromatin reorganisation during oocyte development. Because of the conservation between Drosophila and human meiosis, this study provides novel insights into the regulation of meiotic progression in human oocytes.
Subjects/Keywords: chromosomal reorganisations; Kdm5/Lid; Drosophila; chromosome segregation; H3K4me3; oocytes
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhaunova, L. (2017). Regulation of oocyte-specific chromatin organisation during prophase I by the histone demethylase Kdm5/Lid and other proteins. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/29007
Chicago Manual of Style (16th Edition):
Zhaunova, Liudmila. “Regulation of oocyte-specific chromatin organisation during prophase I by the histone demethylase Kdm5/Lid and other proteins.” 2017. Doctoral Dissertation, University of Edinburgh. Accessed March 03, 2021.
http://hdl.handle.net/1842/29007.
MLA Handbook (7th Edition):
Zhaunova, Liudmila. “Regulation of oocyte-specific chromatin organisation during prophase I by the histone demethylase Kdm5/Lid and other proteins.” 2017. Web. 03 Mar 2021.
Vancouver:
Zhaunova L. Regulation of oocyte-specific chromatin organisation during prophase I by the histone demethylase Kdm5/Lid and other proteins. [Internet] [Doctoral dissertation]. University of Edinburgh; 2017. [cited 2021 Mar 03].
Available from: http://hdl.handle.net/1842/29007.
Council of Science Editors:
Zhaunova L. Regulation of oocyte-specific chromatin organisation during prophase I by the histone demethylase Kdm5/Lid and other proteins. [Doctoral Dissertation]. University of Edinburgh; 2017. Available from: http://hdl.handle.net/1842/29007

Louisiana State University
29.
Luster, Sabrina Marie.
Cryopreservation of bovine and caprine oocytes by vitrification.
Degree: MS, Animal Sciences, 2004, Louisiana State University
URL: etd-11082004-231115
;
https://digitalcommons.lsu.edu/gradschool_theses/4030
► Cryopreservation of animal oocytes will permit germplasm of valuable or unique females to be preserved for extended times. The objective of this research was to…
(more)
▼ Cryopreservation of animal oocytes will permit germplasm of valuable or unique females to be preserved for extended times. The objective of this research was to derive a procedure to cryopreserve bovine oocytes by vitrification to be used as recipients for somatic cell nuclear transfer (SCNT). Caprine oocytes vitrified by the same procedure were assayed by cytological examination of microtubules. In the first two of three experiments, bovine oocytes matured in vitro were vitrified in a mixture of ethylene glycol (EG), dimethylsulfoxide (Me2SO) and trehalose, and then subjected to in vitro fertilization (IVF) or SCNT. For vitrification, oocytes were first exposed to increasing concentrations of EG + Me2SO, placed into the vitrification solution composed of 2.8 M Me2SO + 3.6 M EG + 0.65 M trehalose for 20 sec, immediately loaded onto 20-ìm cryoloops, and finally plunged directly into liquid nitrogen (LN2). Vitrified oocytes were warmed by direct immersion of cryoloops into 0.25 M trehalose prepared in TCM-199 medium at 37°C, rinsed briefly, and then assayed. In Experiment I, of 327 bovine oocytes subjected to IVF after being vitrified, 267 cleaved and 32 (9.8%) formed blastocysts, compared to 32.1% blastocysts for control oocytes. In Experiment II, of 266 bovine oocytes enucleated after vitrification and subjected to SCNT, 248 formed couplets, 152 of which cleaved and 31 (12.5%) developed into blastocysts, compared to 33.0% blastocysts for controls. During the course of Experiment II, 20 of 31 blastocysts derived by SCNT of somatic cells from a Brahman cow into vitrified oocytes were transferred into recipients, resulting in three pregnancies and the birth of one Braham calf that has survived to adulthood. In Experiment III, cytological analysis of caprine oocytes vitrified by the same procedure used for bovine oocytes demonstrated that their microtubules were normal, suggesting that this same procedure can also be used for the former species. The results demonstrate that bovine oocytes can be successfully vitrified and warmed, yielding normal embryos after fertilization or SCNT. Additional research is needed to verify that caprine oocytes vitrified by this method can also develop into kids.
Subjects/Keywords: cryopreservation; vitrification; oocytes; caprine; bovine
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Luster, S. M. (2004). Cryopreservation of bovine and caprine oocytes by vitrification. (Masters Thesis). Louisiana State University. Retrieved from etd-11082004-231115 ; https://digitalcommons.lsu.edu/gradschool_theses/4030
Chicago Manual of Style (16th Edition):
Luster, Sabrina Marie. “Cryopreservation of bovine and caprine oocytes by vitrification.” 2004. Masters Thesis, Louisiana State University. Accessed March 03, 2021.
etd-11082004-231115 ; https://digitalcommons.lsu.edu/gradschool_theses/4030.
MLA Handbook (7th Edition):
Luster, Sabrina Marie. “Cryopreservation of bovine and caprine oocytes by vitrification.” 2004. Web. 03 Mar 2021.
Vancouver:
Luster SM. Cryopreservation of bovine and caprine oocytes by vitrification. [Internet] [Masters thesis]. Louisiana State University; 2004. [cited 2021 Mar 03].
Available from: etd-11082004-231115 ; https://digitalcommons.lsu.edu/gradschool_theses/4030.
Council of Science Editors:
Luster SM. Cryopreservation of bovine and caprine oocytes by vitrification. [Masters Thesis]. Louisiana State University; 2004. Available from: etd-11082004-231115 ; https://digitalcommons.lsu.edu/gradschool_theses/4030

Utah State University
30.
Alhojaily, Sameer M.
The Effect of Lactation and Energy Status on Gene Expression in the Main Reproductive Tissues of Lactating Dairy Cattle.
Degree: PhD, Animal, Dairy, and Veterinary Sciences, 2019, Utah State University
URL: https://digitalcommons.usu.edu/etd/7588
► Modern high-yielding dairy cows are currently producing far more milk than their ancestors due to a prolonged and intensive genetic selection for milk production…
(more)
▼ Modern high-yielding dairy cows are currently producing far more milk than their ancestors due to a prolonged and intensive genetic selection for milk production trait accompanied by the revolutionary improvement in technology, management, and nutrition. On the other hand, a noticeable decline in fertility and reproductive performance was undeniably consistent with the increase in milk yield. This decline in fertility and reproductive performance are recognized worldwide and well documented in several studies. Dairy cows typically experience a period of energy deficit during the first few months of lactation due to the rapid increase in milk production and limited feed intake. This shortage of energy requirements results in loss of body fat which is associated with the disturbance of the normal levels of certain hormones and metabolites. The significant increase in milk yield has increased the severity and duration of the energy deficit which has an adverse effect on the main reproductive cells and tissues that profoundly contribute to fertility. These include the egg from the ovary, the early embryo, and the internal lining of the uterus. Fertilization of a healthy egg results in the development of an embryo with an excellent quality that can survive through the multiple stages of gestation, especially during the first two weeks of gestation when many embryos die. The embryos in the early stages are the most susceptible to the disturbance in their environment. Energy deficit was shown to negatively impact the egg and embryo quality and make the uterus lining suboptimal to support early embryo development. Understanding the mechanisms by which energy deficit influences the main reproductive tissues will help in developing profound strategies to improve fertility in dairy cows.
Advisors/Committee Members: S. Clay Isom, Allen J. Young, Irina Polejaeva, ;.
Subjects/Keywords: Dairy cows; Fertility; Negative energy balance; Oocytes; Embryos; Endometrium; Animal Sciences
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APA (6th Edition):
Alhojaily, S. M. (2019). The Effect of Lactation and Energy Status on Gene Expression in the Main Reproductive Tissues of Lactating Dairy Cattle. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/7588
Chicago Manual of Style (16th Edition):
Alhojaily, Sameer M. “The Effect of Lactation and Energy Status on Gene Expression in the Main Reproductive Tissues of Lactating Dairy Cattle.” 2019. Doctoral Dissertation, Utah State University. Accessed March 03, 2021.
https://digitalcommons.usu.edu/etd/7588.
MLA Handbook (7th Edition):
Alhojaily, Sameer M. “The Effect of Lactation and Energy Status on Gene Expression in the Main Reproductive Tissues of Lactating Dairy Cattle.” 2019. Web. 03 Mar 2021.
Vancouver:
Alhojaily SM. The Effect of Lactation and Energy Status on Gene Expression in the Main Reproductive Tissues of Lactating Dairy Cattle. [Internet] [Doctoral dissertation]. Utah State University; 2019. [cited 2021 Mar 03].
Available from: https://digitalcommons.usu.edu/etd/7588.
Council of Science Editors:
Alhojaily SM. The Effect of Lactation and Energy Status on Gene Expression in the Main Reproductive Tissues of Lactating Dairy Cattle. [Doctoral Dissertation]. Utah State University; 2019. Available from: https://digitalcommons.usu.edu/etd/7588
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