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1996-03-09
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Document 0554
DOCN M9650554
TI HIV acquires functional adhesion receptors from host cells.
DT 9605
AU Guo MM; Hildreth JE; Department of Pharmacology and Molecular Sciences,
Johns Hopkins; University School of Medicine, Baltimore, Maryland 21205,
USA.
SO AIDS Res Hum Retroviruses. 1995 Sep;11(9):1007-13. Unique Identifier :
AIDSLINE MED/96089207
AB CD4 is known to serve as the principal cellular receptor for HIV.
However, several observations suggest that other molecules may be
involved in infection of cells by HIV. Cell adhesion molecules and their
ligands expressed on HIV-susceptible cells have been implicated in the
biology of HIV in a number of studies. We have recently reported that
HIV and SIV acquire cell adhesion molecules from host cells. We now
report that a specific cell adhesion molecule, CD44, that is acquired by
HIV retains its biological activity when expressed on the virus. We
tested CEMx174 cells, which are CD4-positive and HIV-susceptible for
phorbol ester-inducible binding to hyaluronic acid through CD44. Phorbol
ester-stimulated but not unstimulated CEMx174 cells bound hyaluronic
acid. Likewise, HIV from stimulated cells but not from unstimulated
cells bound hyaluronic acid through acquired CD44 molecules. This is the
first demonstration that adhesion molecules acquired by HIV are
functional and the results imply that HIV may have the capacity to bind
to any cell or substrate that its host cell binds to. The demonstration
of functional adhesion receptors on HIV has important implications with
respect to the tropism, infectivity, and dissemination of HIV.
DE Antigens, CD44/*PHYSIOLOGY Cell Adhesion/DRUG EFFECTS/PHYSIOLOGY Cell
Adhesion Molecules/PHYSIOLOGY Cell Line CD4-Positive
T-Lymphocytes/IMMUNOLOGY/METABOLISM/VIROLOGY Human Hyaluronic
Acid/METABOLISM HIV/*PHYSIOLOGY/PATHOGENICITY Models, Biological
Receptors, HIV/*PHYSIOLOGY Support, U.S. Gov't, P.H.S.
Tetradecanoylphorbol Acetate/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).