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1996-02-26
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Document 0729
DOCN M9620729
TI Gamma delta T cells in rhesus monkeys and their response to simian
immunodeficiency virus (SIV) infection.
DT 9602
AU Gan YH; Pauza CD; Malkovsky M; Department of Medical Microbiology and
Immunology, University of; Wisconsin Medical School, Madison 53706, USA.
SO Clin Exp Immunol. 1995 Nov;102(2):251-5. Unique Identifier : AIDSLINE
MED/96069871
AB Recent reports of the increase in peripheral blood gamma delta T cells
in HIV+ patients prompted us to examine the gamma delta T cell system in
rhesus monkeys (Macaca mulatta) and the responses of these cells to SIV
infection. Our results reveal differences in the gamma delta T cell
subset composition and their expression of CD8 in the peripheral blood
of monkeys and humans. The outgrowth of simian gamma delta T cells in
response to Daudi cells is similar to that in humans, but the exposure
to IL-2 stimulates preferentially the simian V delta 1 subset rather
than the V gamma 9/V delta 2 subset as found in humans. Upon SIV
infection of the monkeys, we observed a transient increase of the
percentage of total gamma delta T cell and the V gamma 9 subset. gamma
delta T cells from infected animals also express more activation markers
such as CD69, CD44 and the memory marker CD45RO. However, they respond
to a lesser degree to Daudi or IL-2 stimulation in the outgrowth
experiments compared with uninfected animals, although the subset
composition of total gamma delta T cells is similar in infected and
uninfected animals. The results clearly indicate that gamma delta T
cells in rhesus monkeys are influenced by SIV infection. The detailed
analysis of the gamma delta T cell response to SIV infection can serve
as a model for understanding human gamma delta T cell responses to HIV
infections.
DE Animal Antigens, CD/METABOLISM Antigens, CD44/METABOLISM Antigens,
Differentiation, T-Lymphocyte/METABOLISM CD4 Lymphocyte Count Gene
Rearrangement, delta-Chain T-Cell Antigen Receptor Human
Immunophenotyping Lymphocyte Transformation Macaca mulatta Receptors,
Antigen, T-Cell, gamma-delta/IMMUNOLOGY Simian Acquired
Immunodeficiency Syndrome/*IMMUNOLOGY Support, Non-U.S. Gov't Support,
U.S. Gov't, P.H.S. T-Lymphocyte Subsets/*IMMUNOLOGY Tumor Cells,
Cultured/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).