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M9620721.TXT
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1996-02-26
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Document 0721
DOCN M9620721
TI A CD3+CD8+ T cell population lacking CD5 antigen expression is expanded
in peripheral blood of human immunodeficiency virus-infected patients.
DT 9602
AU Indraccolo S; Mion M; Zamarchi R; Coppola V; Calderazzo F; Amadori A;
Chieco-Bianchi L; Institute of Oncology, University of Padua, Italy.
SO Clin Immunol Immunopathol. 1995 Dec;77(3):253-61. Unique Identifier :
AIDSLINE MED/96080353
AB In this study we analyzed the behavior of a CD3+ T cell subpopulation
lacking CD5 antigen expression in PBMC from HIV-1-infected patients.
CD3+CD5- lymphocytes were greatly increased in peripheral blood of
HIV-1+ patients, accounting for 20.6 +/- 9.9% of the total CD3+ cells,
compared to seronegative individuals (5.5 +/- 3.2%). In both
seropositive patients and controls, CD3+CD5- cells belonged to the CD8+
compartment; they were nonactivated, TCR alpha/beta+, naive lymphocytes,
and in seronegative individuals preferentially expressed NK
cell-associated markers, such as CD11b, CD16, CD56, and CD57. The
phenotypic profile of this subset was slightly different in seropositive
patients; while TCR expression and CD45RA/RO profile were comparable,
CD11b and CD16 expression was lower compared to control figures, while
CD56 expression was not changed, and CD57 expression was enhanced.
Functional analysis of enriched CD3+CD8+CD5- cells showed an impaired
ability to proliferate in response to mitogenic and antigenic stimuli;
despite their NK-like phenotype, CD3+CD8+CD5- cells did not exert any NK
cytotoxic activity, and only a lectin-dependent cytotoxic potential
could be evidenced in this population. These results describe a novel
alteration in the lymphocytes phenotypic profile during HIV-1 infection,
involving a transitional population, which shares some properties of the
T and of the NK cell lineage.
DE Antigens, CD3/*ANALYSIS Antigens, CD5/*ANALYSIS Antigens,
CD8/*ANALYSIS Biological Markers/ANALYSIS Cells, Cultured
Cytotoxicity, Immunologic/IMMUNOLOGY Female Human HIV
Infections/BLOOD/*IMMUNOLOGY HIV-1/IMMUNOLOGY Immunophenotyping
Lymphocyte Transformation/IMMUNOLOGY Male Support, Non-U.S. Gov't
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).