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- Document 0573
- DOCN M9480573
- TI Inhibition of HIV replication by CD8+ T cells correlates with CD4 counts
- and clinical stage of disease.
- DT 9410
- AU Gomez AM; Smaill FM; Rosenthal KL; Department of Pathology, McMaster
- University Health Sciences; Center, Hamilton, Ontario, Canada.
- SO Clin Exp Immunol. 1994 Jul;97(1):68-75. Unique Identifier : AIDSLINE
- MED/94306755
- AB We sought to evaluate the relationship of CD8+ T cell-mediated
- inhibition of autologous HIV replication in vitro to disease stage in
- HIV+ individuals. Depletion of CD8+ T cells from peripheral blood
- lymphocytes of 16 HIV+ subjects increased the percentage of
- virus-producing cultures from 56% to 81%. CD4+ T cells were purified
- from 52 HIV+ individuals and cultured alone or in the presence of
- autologous CD8+ T cells. In 13 (25%) subjects HIV replication was only
- detected in the absence of CD8+ T cells (inhibition positive); in 26
- (50%) viral replication occurred both in the absence and presence of
- CD8+ cells (inhibition negative). In the remaining 13 (25%) subjects,
- CD8+ T cell-mediated inhibitory activity could not be evaluated because
- stimulation of their purified CD4+ T cells did not result in p24
- production. In some virus culture-negative individuals, the inability to
- demonstrate HIV replication was due to the presence of low numbers of
- CD8+ T cells that co-purified with CD4+ T cells. Detection of inhibitory
- CD8+ T cells was associated with significantly higher CD4 counts and
- better clinical status compared with inhibition-negative subjects. These
- results demonstrate that CD8+ T cell-mediated inhibition of HIV
- replication correlates with disease stage, and thus may play a role in
- preventing disease progression. CD8+ T cells did not inhibit autologous
- HIV replication across a semipermeable membrane. Further, the ability of
- CD8+ T cells to prevent HIV replication did not correlate with lysis of
- autologous CD4+ T cells. Thus, CD8+ T cells inhibited autologous HIV
- replication in vitro through a contact-mediated non-lytic mechanism.
- DE Antigens, CD8/*METABOLISM Cell Communication Concanavalin
- A/PHARMACOLOGY Human HIV Core Protein p24/BIOSYNTHESIS HIV
- Infections/BLOOD/*IMMUNOLOGY/*MICROBIOLOGY
- HIV-1/*IMMUNOLOGY/*PHYSIOLOGY In Vitro Leukocyte Count Lymphocyte
- Transformation Reverse Transcriptase/METABOLISM Support, Non-U.S.
- Gov't T-Lymphocyte Subsets/*IMMUNOLOGY T4 Lymphocytes/IMMUNOLOGY
- Virus Replication JOURNAL ARTICLE
-
- SOURCE: National Library of Medicine. NOTICE: This material may be
- protected by Copyright Law (Title 17, U.S.Code).
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-