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Temple University

1. Sommerville, Laura Jean. The Role of Allograft Inflammatory Factor-1 in Vascular Smooth Muscle Cell Activation and Development of Vascular Proliferative Disease.

Degree: PhD, 2010, Temple University

Molecular and Cellular Physiology

The underlying cause of all vascular proliferative diseases is injury-induced activation of vascular endothelium and vascular smooth muscle cells (VSMC). Activated VSMC proliferate, than migrate from the arterial media to the intima, contributing to neointima formation. Activated immune cells, vascular cells, and their endogenous regulators mediate this complex process. One integral regulator of VSMC activation is allograft inflammatory factor-1 (AIF-1). AIF-1 is a cytoplasmic scaffold protein, expressed constitutively in lymphoid cells and induced in VSMC by injury. Stable over expression of AIF-1 increases VSMC proliferation and migration in vitro, causes increased injury-induced neointima formation, and increases Rac1 and p38 MAP Kinase activity. Recent studies show a correlation between VSMC expression of AIF-1 and atherosclerosis development. We hypothesize that VSMC over expression of AIF-1 contributes to atherosclerosis development by increasing activity of inflammatory signaling molecules, and that inhibiting VSMC AIF-1 expression will decrease injury-induced neointima formation. Rat carotid arteries transfected with AIF-1 si RNA adenovirus after balloon angioplasty developed significantly less neointima compared to controls. AIF-1 si RNA transfected VSMC proliferated significantly less than AIF-1 or GFP transfected VSMC, while AIF-1 si RNA transfection did not attenuate AIF-1-mediated migration. p38 inhibition showed that AIF-1-mediated proliferation is dependent on p38 activation while AIF-1-mediated migration is not. AIF-1 transgenic mice fed a high fat diet showed significantly more atherosclerotic lesions than WT littermates. Boyden Chamber assays showed OxLDL treatment increases VSMC migration but does not effect AIF-1-mediated migration. Expression of migration and inflammatory responsive genes in AIF-1 and XGal transfected VSMC after OxLDL treatment at various time points were examined. MMP-2 and -9 expression did not change. ICAM-1 and VCAM-1 expression increased in both groups. AIF-1 VSMC showed significantly higher ICAM-1 expression at baseline and early time points and elevated, but not significantly higher VCAM-1 expression at early time points. Western blots showed increased activation of NF-kB in AIF-1 transfected VSMC at baseline and 30 minutes after OxLDL stimulation compared to XGal transfected VSMC. Expression of the scavenger receptor receptors CD36 and SRA(I) expression increased after lipid treatment in AIF-1 and XGal transfected groups. AIF-1 VSMC showed sustained expression of both receptors after 16 hours of treatment compared to XGal VSMC, which showed decreased expression at that time point. CXCL16/PSOX expression increased with treatment, but differences in expression patterns were not seen between cell groups. Analysis showed significantly more OxLDL was taken up by AIF-1 VSMC compared to XGal VSMC. These data show that AIF-1 expression in VSMC is tightly linked to the vascular response to injury and development of vascular disease. Although…

Advisors/Committee Members: Autieri, Michael V., Driska, Steven Paul, Houser, Steven R., Ganea, Doina, Wolfson, Marla R..

Subjects/Keywords: Biology, Physiology; Allograft Inflammatory Factor-1; Atherosclerosis; Smooth Muscle Cell Activation; Vascular Proliferative Disease

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

APA (6th Edition):

Sommerville, L. J. (2010). The Role of Allograft Inflammatory Factor-1 in Vascular Smooth Muscle Cell Activation and Development of Vascular Proliferative Disease. (Doctoral Dissertation). Temple University. Retrieved from http://digital.library.temple.edu/u?/p245801coll10,76756

Chicago Manual of Style (16th Edition):

Sommerville, Laura Jean. “The Role of Allograft Inflammatory Factor-1 in Vascular Smooth Muscle Cell Activation and Development of Vascular Proliferative Disease.” 2010. Doctoral Dissertation, Temple University. Accessed August 03, 2020. http://digital.library.temple.edu/u?/p245801coll10,76756.

MLA Handbook (7th Edition):

Sommerville, Laura Jean. “The Role of Allograft Inflammatory Factor-1 in Vascular Smooth Muscle Cell Activation and Development of Vascular Proliferative Disease.” 2010. Web. 03 Aug 2020.

Vancouver:

Sommerville LJ. The Role of Allograft Inflammatory Factor-1 in Vascular Smooth Muscle Cell Activation and Development of Vascular Proliferative Disease. [Internet] [Doctoral dissertation]. Temple University; 2010. [cited 2020 Aug 03]. Available from: http://digital.library.temple.edu/u?/p245801coll10,76756.

Council of Science Editors:

Sommerville LJ. The Role of Allograft Inflammatory Factor-1 in Vascular Smooth Muscle Cell Activation and Development of Vascular Proliferative Disease. [Doctoral Dissertation]. Temple University; 2010. Available from: http://digital.library.temple.edu/u?/p245801coll10,76756

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