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1996-02-26
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Document 0831
DOCN M9620831
TI Differential effects of human immunodeficiency virus type 1 envelope
protein gp120 on interferon production by mononuclear cells from adults
and neonates.
DT 9602
AU Nair MP; Chadha KC; Stadler I; Sweet A; Schwartz SA; Department of
Medicine and Microbiology, State University of New; York at Buffalo,
USA.
SO Clin Diagn Lab Immunol. 1995 Jul;2(4):434-8. Unique Identifier :
AIDSLINE MED/96082419
AB While considerable progress in examining the course of human
immunodeficiency virus (HIV) infection in adults has been made, a better
understanding of the natural history of perinatal HIV infection remains
to be obtained. Dysregulation of the production and functions of various
cytokines, especially the interferons (IFNs), during HIV infections has
been reported. Using an in vitro model system, we examined the effects
of the HIV type 1 envelope protein, gp120 (10, 50, and 100 ng/ml), on
gamma IFN (IFN-gamma) and IFN-alpha production by lymphocytes from
neonates and adults and also examined the potential regulatory effects
of gp120 on phorbol 12-myristate acetate (PMA)- and Sendai virus-induced
IFN-gamma and IFN-alpha production by lymphocytes. PMA at a
concentration of 50 ng/ml plus 50 ng of calcium ionophore A23187 per ml
was used to induce IFN-gamma, while 150 hemagglutinating units of Sendai
virus was used to induce IFN-alpha production. The antiviral activity of
both IFN-alpha and IFN-gamma in leukocyte culture supernatants was
assayed on BG-9 cells by a dye uptake technique using vesicular
stomatitis virus as a challenge virus. Placental cord blood leukocyte
(CBL) samples from healthy, term infants and adult peripheral blood
leukocytes (APBL) produced no IFN in response to gp120. However, CBL
produced significantly decreased levels of IFN-gamma compared with APBL
in response to PMA plus ionophore. gp120 significantly suppressed both
Sendai virus-induced IFN-alpha and PMA-induced IFN-gamma production by
both CBL and APBL in a dose-dependent manner. However, gp120-induced
suppression of IFN-alpha and IFN-gamma was significantly greater with
CBL than with APBL.(ABSTRACT TRUNCATED AT 250 WORDS)
DE Adult Antigens, CD45/DRUG EFFECTS Comparative Study Female Human
HIV Envelope Protein gp120/*PHARMACOLOGY Immunophenotyping
Immunosuppressive Agents/PHARMACOLOGY Infant, Newborn Interferon Type
II/BIOSYNTHESIS/DRUG EFFECTS Interferon-alpha/ANTAGONISTS &
INHIB/*BIOSYNTHESIS/*DRUG EFFECTS Ionophores/PHARMACOLOGY Leukocytes,
Mononuclear/DRUG EFFECTS/*METABOLISM/VIROLOGY Lymphocytes/DRUG
EFFECTS/METABOLISM Male Parainfluenza Virus Type 1/DRUG
EFFECTS/IMMUNOLOGY Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S.
Tetradecanoylphorbol Acetate/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).