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Analysis of regulatory T cell activation markers in feline immunodeficiency virus (FIV)-infected and control placenta samples from early and late term pregnancy

Mother-to-child transmission of HIV is the leading cause of pediatric AIDS; however, mechanisms by which HIV compromises pregnancy are not understood. CD4+CD25+ T-regulatory (Treg) cells play a role in pregnancy maintenance. RNA from early and late gestation placentas and fetuses from FIV-infected and control cats were probed for expression of FIV gag and Treg markers CD25, FOXP3, and CTLA4, using real time reverse-transcriptase (RT)-PCR. High rates of vertical transmission and reproductive failure were detected in early and late pregnancy. In control animals, both FOXP3 and CTLA4 expression decreased with gestational stage, indicating a natural decline in Tregs. Expression of FOXP3 and CTLA4 was decreased at early gestation in FIV-infected queens and a trend toward decreased expression of CD25, FOXP3, and CTLA4 in placentas from FIV-infected queens producing non-viable pregnancies was observed as well. Our results suggest that FIV infection may alter placental Treg function and adversely affect pregnancy outcome.

Identiferoai:union.ndltd.org:MSSTATE/oai:scholarsjunction.msstate.edu:td-1653
Date11 December 2009
CreatorsLockett, Nikki Nikkia
PublisherScholars Junction
Source SetsMississippi State University
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceTheses and Dissertations

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