home *** CD-ROM | disk | FTP | other *** search
- 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).
-
-