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M9620683.TXT
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1996-02-26
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Document 0683
DOCN M9620683
TI Alterations of T-cell receptor variable region expression in human
immunodeficiency virus disease.
DT 9602
AU McCoy JP Jr; Overton WR; Blumstein L; Baxter JD; Gekowski KM; Donaldson
MH; Department of Pediatrics, Cooper Hospital/University Medical;
Center, Camden, New Jersey, USA.
SO Cytometry. 1995 Mar 15;22(1):1-9. Unique Identifier : AIDSLINE
MED/96090275
AB Since only a small percentage of CD4+ lymphocytes is infected at any one
time during the course of human immunodeficiency virus (HIV) disease, a
question central to the pathogenesis of HIV is whether or not the
depletion of CD4+ lymphocytes is a random or selective event. The
majority of peripheral blood T lymphocytes use alpha and beta variable
chains as components of their T-cell receptor (TCR) complex. Depletion
of CD4+ T lymphocytes from the peripheral blood may be dependent on the
V beta chain expressed by the CD4+ cell, based on the hypothesis that
HIV may encode a superantigen. Peripheral blood from normal controls and
HIV+ patients was studied for alterations in the expression of various V
beta chains of the TCR. Three-color flow cytometry was used to determine
the expression of V beta 2, V beta 3, V beta 8, V beta 13, and V beta 19
on all lymphocytes and on both CD4+ and CD8+ lymphocytes independently.
Alteration of the V beta chains in HIV+ disease was analyzed as a
function of absolute CD4 count and Centers for Disease Control (CDC)
stage of the patient. These data suggest that the loss of T helper (CD4)
lymphocytes during the course of HIV disease may be a selective event.
These data are consistent with the hypothesis that selective depletion
of CD4+, V beta 19+ lymphocytes may be due to the encoding of a
superantigen by HIV. Furthermore, using multicolor flow cytometry and
stratifying patients by absolute CD4 counts (or stage of disease) may
reveal immunologic changes that might otherwise be overlooked.
DE Adult Antibodies, Monoclonal *Antigenic Variation CD4 Lymphocyte
Count CD8-Positive T-Lymphocytes Female *Flow Cytometry Human HIV
Infections/*IMMUNOLOGY Male Middle Age Receptors, Antigen,
T-Cell/*IMMUNOLOGY Support, Non-U.S. Gov't CLINICAL TRIAL JOURNAL
ARTICLE RANDOMIZED CONTROLLED TRIAL
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).