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M9650471.TXT
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1996-03-09
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Document 0471
DOCN M9650471
TI Interleukin-2-inducible natural immune (lymphokine-activated killer
cell) responses as a functional correlate of progression to AIDS.
DT 9605
AU Brenner BG; Gornitsky M; Wainberg MA; McGill AIDS Centre, Lady Davis
Institute--Jewish General; Hospital, Montreal, Quebec, Canada.
SO Clin Diagn Lab Immunol. 1994 Sep;1(5):538-44. Unique Identifier :
AIDSLINE MED/96050868
AB The functions of natural killer (NK) cells and their
interleukin-2-deducible counterparts, lymphokine-activated killer (LAK)
cells, are often impaired in human immunodeficiency virus (HIV)-infected
individuals. A statistical approach was used to establish if changes in
LAK activity were associated with antiviral drug therapy, HIV-1 burden,
or lymphocyte subset alterations. Our study group included 61
HIV-positive subjects without any opportunistic infections (OI-), 16 of
whom received zidovudine (AZT), and 97 HIV-positive individuals with
AIDS-related infection (OI+), 50 of whom received AZT. As expected,
there was a stepwise decrease in total lymphocyte numbers in OI+ groups
as a result of the selective loss of CD4+ cells. The groups receiving
AZT therapy had fewer CD4+ cells but lower circulating p24 antigen
levels than corresponding untreated groups did. No significant changes
in the relative proportions or absolute numbers of CD56+ subsets in
HIV-positive groups could be ascribed to OI status or AZT intervention.
LAK cell cytotoxic responses, measured as LU20 values (which give a
measure of 20% cytolysis of target cells), lysis per unit CD56+ NK cell,
or lysis per unit blood volume, declined in OI+ groups. No main or
interactive effects of AZT therapy on LAK activities were observed.
Multivariate general linear models were used to determine the
interactive effects of NK- and T-cell subsets on measured LAK cell
numbers were added negative and positive predictors of LAK activity,
respectively. These findings indicate that declines in NK-mediated LAK
cell responses serve as functional correlates of progression in
HIV-infected individuals.
DE Acquired Immunodeficiency Syndrome/*IMMUNOLOGY Antigens, CD56/ANALYSIS
AIDS-Related Opportunistic Infections/IMMUNOLOGY CD4-Positive
T-Lymphocytes/IMMUNOLOGY Human Immunity, Natural/IMMUNOLOGY
Interleukin-2/*PHARMACOLOGY Killer Cells, Lymphokine-Activated/*DRUG
EFFECTS/*IMMUNOLOGY Linear Models Lymphocyte Count Multivariate
Analysis Support, Non-U.S. Gov't T-Lymphocyte
Subsets/CYTOLOGY/IMMUNOLOGY Zidovudine/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).