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M9620852.TXT
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1996-02-26
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Document 0852
DOCN M9620852
TI Effect of antibody to HIV-1 Tat protein on viral replication in vitro
and progression of HIV-1 disease in vivo.
DT 9602
AU Re MC; Furlini G; Vignoli M; Ramazzotti E; Roderigo G; De Rosa V; Zauli
G; Lolli S; Capitani S; La Placa M; Institute of Microbiology,
University of Bologna Medical School,; St. Orsola General Hospital,
Italy.
SO J Acquir Immune Defic Syndr Hum Retrovirol. 1995 Dec 1;10(4):408-16.
Unique Identifier : AIDSLINE MED/96074273
AB In HIV-1-infected cell cultures, a relatively low concentration (5
micrograms/ml) of monoclonal antibody (mAb) against
HIV-1-transactivating Tat protein was an efficient inhibitor of HIV-1
replication both in HIV-1(IIIB)-infected Jurkat cell and peripheral
blood mononuclear cell (PBMC) cultures and significantly reduced the
expression of a Tat-responsive CAT-reporter construct in
HIV-1(IIIB)-infected Jurkat cells. Anti-Tat mAb also caused a
significant reduction and a consistent delay in HIV-1 replication when
added to PBMCs from HIV-1-infected patients cocultivated with
phytohemagglutinin (PHA)-stimulated normal PBMCs. These data indicate
that an autocrine-paracrine loop sustained by extracellular Tat protein,
which is actively released by HIV-1-infected cells, may affect HIV-1
replication in cell cultures in vitro. An inverse relationship between
natural anti-Tat antibody levels and p24 antigenemia was demonstrated by
retrospective analysis of serial serum samples obtained from 10
HIV-1-seropositive hemophiliac patients followed over a 7-9-year period.
This datum points to a possible influence of anti-Tat antibody on the
progression of HIV-1 disease in vivo. These findings have strong
implications for Tat protein as a possible target for specific
immunotherapy in HIV-1-infected patients.
DE Antibodies, Monoclonal/IMMUNOLOGY/*PHARMACOLOGY Cell Line Cells,
Cultured Chloramphenicol Acetyltransferase/BIOSYNTHESIS Disease
Progression Gene Products, tat/*IMMUNOLOGY Hemophilia/COMPLICATIONS
Human HIV Antibodies/IMMUNOLOGY/*PHARMACOLOGY HIV Core Protein
p24/IMMUNOLOGY HIV Infections/COMPLICATIONS/*IMMUNOLOGY/PHYSIOPATHOLOGY
HIV-1/IMMUNOLOGY/*PHYSIOLOGY Leukocytes, Mononuclear/VIROLOGY
Repetitive Sequences, Nucleic Acid Support, Non-U.S. Gov't
Trans-Activation (Genetics) Transfection *Virus Replication/DRUG
EFFECTS/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).