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- Document 0851
- DOCN M9620851
- TI Inhibition of cytotoxicity and cytokine release of CD8+ HIV-specific
- cytotoxic T lymphocytes by pentoxifylline.
- DT 9602
- AU Heinkelein M; Schneider-Schaulies J; Walker BD; Jassoy C; Institute for
- Virology and Immunobiology, Wurzburg University,; Germany.
- SO J Acquir Immune Defic Syndr Hum Retrovirol. 1995 Dec 1;10(4):417-24.
- Unique Identifier : AIDSLINE MED/96074274
- AB HIV-specific cytotoxic T lymphocytes (CTLs) are an important component
- of the host immune response against HIV infection, and these cells
- release a variety of cytokines when they meet their target antigen.
- Since the phosphodiesterase inhibitor pentoxifylline is being used as a
- therapeutic agent in clinical trials of HIV infection due to its
- inhibitory effect on virus replication in vitro, we examined the effect
- of pentoxifylline on cytotoxicity and cytokine secretion by HIV-specific
- CD8+ CTLs. Pentoxifylline inhibited cytotoxicity of CTLs and suppressed
- interferon-gamma, tumor necrosis factor-alpha, and
- granulocyte-macrophage colony-stimulating factor release by these cells
- at the transcription level. Suppression of cytokine release resulted in
- reduced capacity of the CTLs to induce HLA class I and ICAM-1 expression
- and to stimulate HIV-1 replication. These results suggest that
- inhibition of HIV-specific CD8+ CTLs by pentoxifylline may be
- therapeutically relevant. Moreover, this study extends previous
- observations by demonstrating that, in addition to its ability to
- suppress cytokine production by macrophages and CD4+ T helper cells,
- pentoxifylline may inhibit cytotoxicity and cytokine secretion by
- antigen-specific CD8+ cytotoxic T lymphocytes.
- DE Amino Acid Sequence Blotting, Northern Cell Line
- Cytokines/*BIOSYNTHESIS Cytotoxicity, Immunologic/*DRUG EFFECTS
- CD8-Positive T-Lymphocytes/DRUG EFFECTS/METABOLISM/*VIROLOGY Flow
- Cytometry Gene Products, gag/CHEMISTRY Histocompatibility Antigens
- Class I/BIOSYNTHESIS Human HIV Antigens/CHEMISTRY HIV-1/*PHYSIOLOGY
- Intercellular Adhesion Molecule-1/BIOSYNTHESIS Molecular Sequence Data
- Pentoxifylline/*PHARMACOLOGY Phosphodiesterase Inhibitors/*PHARMACOLOGY
- RNA-Directed DNA Polymerase/CHEMISTRY RNA, Messenger/BIOSYNTHESIS
- Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S. T-Lymphocytes,
- Cytotoxic/DRUG EFFECTS/METABOLISM/*VIROLOGY Virus Replication JOURNAL
- ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-