Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for id:"oai:ir.lib.uwo.ca:etd-8079". One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


University of Western Ontario

1. Meilleur, Courtney. Effect of Bacterial Superantigens on the Magnitude and Breadth of Influenza-Specific CD8+ T Cell Responses.

Degree: 2018, University of Western Ontario

Severe cases of influenza A virus (IAV) infection are often complicated by concomitant bacterial pneumonia or sepsis. Many bacterial species are capable of producing potent immunomodulators called superantigens (SAgs), which have the potential to interfere with cell-based antiviral immune mechanisms. I asked what effects bacterial SAgs have on both the magnitude and the breadth of antiviral CD8+ T cell (TCD8+) responses. Surprisingly, administration of SAgs to mice shortly before or after vaccination with IAV increased the number of primary TCD8+ responding to select IAV-derived epitopes. T cell receptor staining of these SAg-augmented populations revealed expression of Vβ regions that bind SAgs. In vivo evaluation of the cytotoxic capability of these cells revealed increased killing of target cells pulsed with viral peptides. Memory TCD8+ specific for IAV were also expanded by certain SAgs and displayed increased effector functions, though the effect of SAgs on TCD8+ recall depended critically on the timing of SAg injection relative to priming and boosting inoculation of IAV. Though SAg exposure did not augment local pulmonary TCD8+ responses to active IAV infection, it also did not impair these responses as measured by the effect on weight loss and viral titre. Finally, I show that SAg-induced augmentation of the magnitude, breadth and function of IAV-specific memory TCD8+ can be recapitulated in in vitro experiments utilizing human cells. This work elucidates an unexpected role for bacterial SAgs as potential enhancers of antiviral immunity in the context of TCD8+-based vaccination strategies.

Subjects/Keywords: T cell; superantigen; influenza; co-infection; vaccination; memory; Staphylococcus aureus; enterotoxin; immunity; immunodominance; Virus Diseases

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Meilleur, C. (2018). Effect of Bacterial Superantigens on the Magnitude and Breadth of Influenza-Specific CD8+ T Cell Responses. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/5874

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):

Meilleur, Courtney. “Effect of Bacterial Superantigens on the Magnitude and Breadth of Influenza-Specific CD8+ T Cell Responses.” 2018. Thesis, University of Western Ontario. Accessed January 23, 2019. https://ir.lib.uwo.ca/etd/5874.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Meilleur, Courtney. “Effect of Bacterial Superantigens on the Magnitude and Breadth of Influenza-Specific CD8+ T Cell Responses.” 2018. Web. 23 Jan 2019.

Vancouver:

Meilleur C. Effect of Bacterial Superantigens on the Magnitude and Breadth of Influenza-Specific CD8+ T Cell Responses. [Internet] [Thesis]. University of Western Ontario; 2018. [cited 2019 Jan 23]. Available from: https://ir.lib.uwo.ca/etd/5874.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Meilleur C. Effect of Bacterial Superantigens on the Magnitude and Breadth of Influenza-Specific CD8+ T Cell Responses. [Thesis]. University of Western Ontario; 2018. Available from: https://ir.lib.uwo.ca/etd/5874

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.