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M9621039.TXT
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1996-02-26
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Document 1039
DOCN M9621039
TI HIV type 1 grown on interferon gamma-treated U937 cells shows selective
increase in virion-associated intercellular adhesion molecule 1 and
HLA-DR and enhanced infectivity for CD4-negative cells.
DT 9602
AU Castilletti C; Capobianchi MR; Fais S; Abbate I; Ficociello B; Ameglio
F; Cordiali Fei P; Santini SM; Dianzani F; Institute of Virology,
University La Sapienza, Rome.
SO AIDS Res Hum Retroviruses. 1995 May;11(5):547-53. Unique Identifier :
AIDSLINE MED/96093889
AB Cellular adhesion molecules, such as ICAM-1, -2, and -3; LFA-1; and HLA
class I and II are incorporated into HIV-1 virions during budding from
infected cells. These virion-associated molecules can be involved in the
adsorption to susceptible cells displaying the corresponding
counterligands. A number of cytokines have been shown to upregulate the
cellular expression of adhesion molecules, such as ICAM-1 and HLA-DR. In
this study we investigated the effects of IFN-gamma on the incorporation
of ICAM-1, LFA-1, and HLA-DR into mature HIV-1 progeny from chronically
infected cells. The ability of such virus progeny to infect either
CD4-positive or -negative cells was also investigated. The results
indicate that IFN-gamma stimulates the expression of ICAM-1 and of
HLA-DR on HIV-1-infected cells, whereas LFA-1 expression is unaffected.
The same modifications were also observed on virus progeny, because
specific MAbs to ICAM-1 and HLA-DR captured infectious HIV-1 from
IFN-treated cells with higher efficiency as compared to virus from
control cells, whereas virus binding to anti LFA-1 MAb was unchanged.
Moreover, the HIV-1 progeny released from IFN-treated cells showed an
increased ability to bind to and to infect CD4-negative cells, whereas
the infectivity was basically unchanged for CD4-positive cells. Our
results suggest that cytokines, as well as other soluble factors, may
expand the host cell range of HIV-1, possibly through modifications of
the cell-derived surface molecules on the virions.(ABSTRACT TRUNCATED AT
250 WORDS)
DE Antigens, CD4 Cell Line Human HIV-1/METABOLISM/*PATHOGENICITY HLA-DR
Antigens/*METABOLISM Intercellular Adhesion Molecule-1/*METABOLISM
Interferon Type II/*PHARMACOLOGY Lymphocyte Function-Associated
Antigen-1/*METABOLISM Monocytes/METABOLISM/VIROLOGY Support, Non-U.S.
Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).