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M94A0159.TXT
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1994-10-01
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Document 0159
DOCN M94A0159
TI HIV-mediated defects in immune regulation.
DT 9412
AU Milman G; D'Souza MP; Division of AIDS, National Institute of Allergy
and Infectious; Diseases, National Institutes of Health, Bethesda,
Maryland; 20892.
SO AIDS Res Hum Retroviruses. 1994 Apr;10(4):421-30. Unique Identifier :
AIDSLINE MED/94347467
AB The Division of AIDS (DAIDS), National Institute of Allergy and
Infectious Diseases (NIAID), sponsored a Workshop on HIV-Mediated
Defects in Immune Regulation on September 29-30, 1993. Workshop
participants included investigators in basic research of immune
regulation, animal models of HIV disease, HIV epidemiology, and HIV
clinical research and treatment. The purpose of the workshop was to
describe and evaluate biological mechanisms of HIV-mediated immune
deficiency other than direct killing of infected CD4+ cells. The
workshop focused on HIV-mediated dysfunction in signal transduction and
in T cell development and maturation. Mechanisms by which HIV has been
proposed to influence signal transduction include gp120 ligation to CD4,
HIV superantigen(s), and HIV-mediated perturbations in signal pathway
components (e.g., receptors, kinases, phosphatases, cytokines, and
cyclins). As a result of signal dysfunction, cells may fail to respond
to foreign antigens (anergy) or become predisposed to enter suicide
pathways, otherwise known as programmed cell death or apoptosis.
Programmed cell death is a normal immune regulatory mechanism that is
activated to prevent anti-self responses and also to delete expanded but
no longer needed cell populations. In the immune system, new cells are
constantly produced from stem cells to replace those that die from age,
pathological response, or programmed cell death. Dysfunction in these
new cells may occur if HIV causes changes in the structural environment
of the thymus and lymph nodes, or in cytokine signals.
DE Animal Disease Models, Animal Human HIV Infections/*IMMUNOLOGY
HIV-1/IMMUNOLOGY Immune Tolerance Retroviridae Infections/IMMUNOLOGY
Signal Transduction T-Lymphocytes/IMMUNOLOGY MEETING REPORT JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).