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M9650462.TXT
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1996-03-09
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Document 0462
DOCN M9650462
TI Peripheral gamma delta T-cell populations in HIV-infected individuals
with mycobacterial infection.
DT 9605
AU Ruiz P; Geraldino N; Department of Pathology, University of Miami School
of Medicine,; Florida.
SO Cytometry. 1995 Sep 15;22(3):211-6. Unique Identifier : AIDSLINE
MED/96106604
AB Previous studies have suggested that gamma delta T cells can be
increased in HIV-1-seropositive individuals, although characterization
of gamma delta T cell subtypes and correlation with clinical status of
these patients have not been performed. We investigated groups of
HIV-seropositive persons to determine the prevalence of elevated levels
of gamma delta T cells and whether any gamma delta T cell subtypes were
preferentially expressed. Since a large proportion of human gamma delta
T cells appear to be reactive to proteins encoded by mycobacteria, we
also examined our patients for the incidence of mycobacterial infection.
Our results show that a significant number of HIV-positive patients have
an elevated number of gamma delta T cells in their peripheral blood as
compared to normal controls. HIV-seropositive patients with clinical or
laboratory evidence of mycobacterial infection had statistically
significant increases in the percentage and total numbers of gamma delta
T cells over the HIV-positive persons without mycobacterial infection.
An examination of the subtypes of gamma delta T cells revealed that
certain subtypes such as V gamma 9+ and V delta 2+ T cells were
preferentially elevated in the mycobacteria-positive patients. These
results suggest that an increased number of gamma delta T cells in
HIV-positive patients is most often seen in the setting of an
opportunistic mycobacterial infection and that specific gamma delta T
cell subtypes are stimulated under these conditions. The role of these
increased number of gamma delta T cells in HIV-associated disease is
unclear but is likely a component of the response and degree of host
resistance to this organism.
DE Adult AIDS-Related Opportunistic Infections/COMPLICATIONS/*IMMUNOLOGY
Female Flow Cytometry Human HIV
Seropositivity/COMPLICATIONS/*IMMUNOLOGY Male Mycobacterium
Infections/COMPLICATIONS/*IMMUNOLOGY/MICROBIOLOGY Receptors, Antigen,
T-Cell, gamma-delta/*IMMUNOLOGY T-Lymphocyte Subsets/*IMMUNOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).