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M94A2546.TXT
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1994-10-25
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Document 2546
DOCN M94A2546
TI HIV infection alters cytokine kinetics in stimulated PBMC.
DT 9412
AU Fahey JL; Fan J; Breen E; Derzic S; Nguyen T; Martinez-Maza O; Dept. of
Microbiology and Immunology, UCLA School of Medicine; 90024-1747.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):28 (abstract no. 085A). Unique
Identifier : AIDSLINE ICA10/94370029
AB OBJECTIVE: To characterize HIV-associated cytokine dysregulation
contributing to activation and deficiency in the immune system, the gene
expression and production of 4 cytokines were investigated. METHODS:
Cytokine expression and secretion by peripheral blood mononuclear cells
(PBMC) from HIV+ (mean CD4/mm3 = 390) and HIV- persons was determined.
mRNA was extracted from cell pellets and culture supernatant (SN)
collected at 0, 4, 24 and 72 hours post-stimulation with PHA or anti-CD3
antibody. Relative amounts of cytokine mRNA were determined by RT-PCR
and cytokine SN concentrations determined by ELISA. RESULTS: Cytokine
mRNA expression (TNF alpha, IL-4, IL-2 and IFN gamma) in HIV+
PHA-stimulated PBMC consistently peaked at 4 hours, in contrast to HIV-
PBMC which peaked at 24 hours. SN peaked at 72 hours. Mean peak IFN mRNA
was higher in HIV+ but IL-4 was lower. Anti-CD3 stimulated HIV+ PBMC
also tended to show peak cytokine mRNA expression at 4 hours.
CONCLUSION: PBMC of HIV+ persons respond to stimulation with more rapid
kinetics of cytokine expression. Differences in individual cytokines
were observed. Such altered kinetics may result in inappropriate
cytokine production, contributing to the disruption of normal immune
function seen in HIV disease.
DE Cytokines/GENETICS/*PHARMACOKINETICS Enzyme-Linked Immunosorbent Assay
Human HIV Infections/*IMMUNOLOGY Interferon Type II/PHARMACOKINETICS
Interleukin-2/PHARMACOKINETICS Interleukin-4/PHARMACOKINETICS
Leukocytes, Mononuclear/METABOLISM Lymphocyte Transformation
Polymerase Chain Reaction RNA, Messenger/ISOLATION & PURIF Tumor
Necrosis Factor/PHARMACOKINETICS MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).