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1996-02-26
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Document 0833
DOCN M9620833
TI Decreased T-cell proliferative response to common environmental antigens
could be an indicator of early human immunodeficiency virus-mediated
lymphocyte lesions.
DT 9602
AU Tassinari P; Deibis L; Blanca I; Bianco NE; Echeverria de Perez G;
Instituto de Inmunologia, Facultad de Medicina, Universidad; Central de
Venezuela, Caracas.
SO Clin Diagn Lab Immunol. 1995 Jul;2(4):404-7. Unique Identifier :
AIDSLINE MED/96082414
AB To evaluate CD4+/CD29+ cells and their responses to different antigens
in polar stages of human immunodeficiency virus (HIV) infection, we
studied 26 HIV-seropositive carriers (SPCs) and 15 patients with AIDS
simultaneously with 20 healthy volunteers (HVs) and 10 seronegative
homosexual and bisexual men (SNH). CD3, CD4, CD29, and CD45RA phenotypes
were analyzed by two-color flow cytometry. Significant depletion of CD4+
T cells and both memory (CD4+/CD29+) and naive (CD4+/CD45RA+) T-cell
subsets was found among SPCs and AIDS patients compared with the numbers
of such cells in the HV and SNH groups. Responses to optimal doses of
Candida albicans, streptokinase, and tetanus toxoid were explored in
peripheral blood mononuclear cells and CD4(+)- and CD4+/CD29(+)-enriched
cell populations. In SPCs, the response to C. albicans in peripheral
blood mononuclear cells showed a statistically significant diminution
compared with the response of HVs (15,308 versus 35,951 cpm). In
addition, a significantly reduced response to streptokinase was evident
only when cell preparations were CD4+/CD29+ enriched (3,048 versus
10,367 cpm). Furthermore, the SPC group comprised seven responders to at
least one antigen and seven nonresponders to any of the selected
specific antigens. Absence of a response in these latter patients was
independent of the absolute counts of memory and naive T-cell
populations. The response to tetanus toxoid, although diminished in
SPCs, was not significantly different from that in controls. Our results
suggest that defective responses to common environmental antigens,
unrelated to the absolute number of CD4+/CD29+ cells, is probably an
early indicator of an HIV-induced lymphocyte lesion.
DE Acquired Immunodeficiency Syndrome/*IMMUNOLOGY/PATHOLOGY Adult
Antigens, CD3 Antigens, CD45 Antigens, Fungal/IMMUNOLOGY Candida
albicans/IMMUNOLOGY Human HIV Seropositivity/*IMMUNOLOGY/PATHOLOGY
HIV-1/*IMMUNOLOGY Immunologic Memory/IMMUNOLOGY *Lymphocyte
Transformation Male Middle Age Prognosis Streptokinase/IMMUNOLOGY
Support, Non-U.S. Gov't T-Lymphocyte Subsets/*IMMUNOLOGY/PATHOLOGY
Tetanus Toxoid/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).