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- Document 0228
- DOCN M9620228
- TI Interleukin 2 induces CD8+ T cell-mediated suppression of human
- immunodeficiency virus replication in CD4+ T cells and this effect
- overrides its ability to stimulate virus expression.
- DT 9602
- AU Kinter AL; Bende SM; Hardy EC; Jackson R; Fauci AS; Laboratory of
- Immunoregulation, National Institute of Allergy and; Infectious
- Diseases, National Institutes of Health, Bethesda, MD; 20892, USA.
- SO Proc Natl Acad Sci U S A. 1995 Nov 21;92(24):10985-9. Unique Identifier
- : AIDSLINE MED/96074631
- AB The nonlytic suppression of human immunodeficiency virus (HIV)
- production from infected CD4+ T cells by CD8+ lymphocytes from
- HIV-infected individuals is one of the most potent host-mediated
- antiviral activities observed in vitro. We demonstrate that the
- pleiotropic cytokine interleukin 2 (IL-2), but not IL-12, is a potent
- inducer of the CD8+ HIV suppressor phenomenon. IL-2 induces HIV
- expression in peripheral blood or lymph node mononuclear cells from
- HIV-infected individuals in the absence of CD8+ T cells. However, IL-2
- induces CD8+ T cells to suppress HIV expression when added back to these
- cultures, and this effect dramatically supersedes the ability to IL-2 to
- induce HIV expression. Five to 25 times fewer CD8+ cells were required
- to obtain comparable levels of inhibition of viral production if they
- were activated in the presence of IL-2 as compared with IL-12 or no
- exogenous cytokine. Furthermore, IL-2 appeared either to induce a
- qualitative increase in HIV suppressor cell activity or to increase the
- relative frequency of suppressor cells in the activated (CD25+) CD8+
- populations. Analyses of proviral levels in peripheral blood mononuclear
- cells suggest that CD8+ T cell-mediated lysis of in vivo infected cells
- is not induced by IL-2. These results have implications for our
- understanding of the effects of impaired IL-2 production during HIV
- disease as well as the overall effects of IL-2-based immunotherapy on
- HIV replication in vivo.
- DE CD4-Positive T-Lymphocytes/*MICROBIOLOGY CD8-Positive
- T-Lymphocytes/*IMMUNOLOGY Human HIV Infections/*IMMUNOLOGY
- HIV-1/*GROWTH & DEVELOPMENT Interleukin-12/PHYSIOLOGY
- Interleukin-2/*PHYSIOLOGY Lymphocyte Transformation/DRUG EFFECTS
- Receptors, Interleukin-2/ANALYSIS/PHYSIOLOGY T-Lymphocyte
- Subsets/*IMMUNOLOGY T-Lymphocytes, Suppressor-Effector/*IMMUNOLOGY
- *Virus Replication JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
-
-