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M9630015.TXT
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1996-02-27
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Document 0015
DOCN M9630015
TI Cell-cell interactions regulate dendritic cell-dependent HIV-1
production in CD4+ T lymphocytes.
DT 9603
AU Pinchuk LM; Polacino PS; Agy MB; Klaus SJ; Clark EA; Regional Primate
Research Center, University of Washington; Medical Center, Seattle
98195, USA.
SO Adv Exp Med Biol. 1995;378:461-3. Unique Identifier : AIDSLINE
MED/96036900
AB We investigated the role of blood dendritic cells (DC) in transmission
of HIV-1 from infected to uninfected CD4+ T cells, and the accessory
molecules involved. DC promoted transmission from infected to uninfected
CD4+ cells, but blood DC themselves were not infectable. DC-mediated
transmission was blocked by mAb to CD4 and MHC class II, but strongly
increased by mAb to CD40 on DC or CD28 on T cells. The DC-dependent
infection was inhibitable by anti-CD80 and a soluble fusion protein of
the CD80 ligand, CTLA4; soluble CTLA4Ig also blocked infection augmented
by crosslinking CD40. We also demonstrated that mAb to CD40 up-regulate
the expression of CTLA4 ligands CD80 and B70/B7-2 (CD86) on DC. These
data suggest that the dialog between CD40-CD40 ligand (CD40L) and
CD28-CD80 counter-receptors on DC and T cells may be linked to HIV
infection in vivo.
DE Antibodies, Blocking/PHARMACOLOGY Antibodies, Monoclonal/PHARMACOLOGY
Antigens, CD/METABOLISM Antigens, CD28/METABOLISM Antigens,
CD40/METABOLISM Antigens, CD80/METABOLISM Antigens,
Differentiation/METABOLISM Blood Cells/IMMUNOLOGY/VIROLOGY Cell
Communication CD4-Positive T-Lymphocytes/*IMMUNOLOGY/*VIROLOGY
Dendritic Cells/*IMMUNOLOGY/*VIROLOGY Human HIV
Infections/IMMUNOLOGY/VIROLOGY HIV-1/PHYSIOLOGY/*PATHOGENICITY In
Vitro Ligands Membrane Glycoproteins/METABOLISM Up-Regulation
(Physiology) Virus Replication JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).