JVI Figure table search 04
Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Esser, M. T.
Right arrow Articles by Lifson, J. D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Esser, M. T.
Right arrow Articles by Lifson, J. D.

 Previous Article  |  Next Article 

Journal of Virology, July 2001, p. 6173-6182, Vol. 75, No. 13
0022-538X/01/$04.00+0   DOI: 10.1128/JVI.75.13.6173-6182.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Differential Incorporation of CD45, CD80 (B7-1), CD86 (B7-2), and Major Histocompatibility Complex Class I and II Molecules into Human Immunodeficiency Virus Type 1 Virions and Microvesicles: Implications for Viral Pathogenesis and Immune Regulation

Mark T. Esser,1 David R. Graham,1 Lori V. Coren,1 Charles M. Trubey,2 Julian W. Bess Jr.,1 Larry O. Arthur,1 David E. Ott,1 and Jeffrey D. Lifson1,*

AIDS Vaccine Program1 and Intramural Research Support Program,2 SAIC-Frederick, National Cancer Institute at Frederick, Frederick, Maryland 21702-1201

Received 14 December 2000/Accepted 6 April 2001

Human immunodeficiency virus (HIV) infection results in a functional impairment of CD4+ T cells long before a quantitative decline in circulating CD4+ T cells is evident. The mechanism(s) responsible for this functional unresponsiveness and eventual depletion of CD4+ T cells remains unclear. Both direct effects of cytopathic infection of CD4+ cells and indirect effects in which uninfected "bystander" cells are functionally compromised or killed have been implicated as contributing to the immunopathogenesis of HIV infection. Because T-cell receptor engagement of major histocompatibility complex (MHC) molecules in the absence of costimulation mediated via CD28 binding to CD80 (B7-1) or CD86 (B7-2) can lead to anergy or apoptosis, we determined whether HIV type 1 (HIV-1) virions incorporated MHC class I (MHC-I), MHC-II, CD80, or CD86. Microvesicles produced from matched uninfected cells were also evaluated. HIV infection increased MHC-II expression on T- and B-cell lines, macrophages, and peripheral blood mononclear cells (PBMC) but did not significantly alter the expression of CD80 or CD86. HIV virions derived from all MHC-II-positive cell types incorporated high levels of MHC-II, and both virions and microvesicles preferentially incorporated CD86 compared to CD80. CD45, expressed at high levels on cells, was identified as a protein present at high levels on microvesicles but was not detected on HIV-1 virions. Virion-associated, host cell-derived molecules impacted the ability of noninfectious HIV virions to trigger death in freshly isolated PBMC. These results demonstrate the preferential incorporation or exclusion of host cell proteins by budding HIV-1 virions and suggest that host cell proteins present on HIV-1 virions may contribute to the overall pathogenesis of HIV-1 infection.


* Corresponding author: Mailing address: Retroviral Pathogenesis Laboratory, AIDS Vaccine Program, SAIC-Frederick, National Cancer Institute at Frederick, Building 535, Fifth Floor, Frederick, MD 21702-1201. Phone: (301) 846-5019. Fax: (301) 846-5588. E-mail: lifson{at}avpaxp1.ncifcrf.gov.


Journal of Virology, July 2001, p. 6173-6182, Vol. 75, No. 13
0022-538X/01/$04.00+0   DOI: 10.1128/JVI.75.13.6173-6182.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.



This article has been cited by other articles:




Home Help [Feedback] [For Subscribers] [Archive] [Search] [Contents]
J. Bacteriol. Mol. Cell. Biol. Microbiol. Mol. Biol. Rev.
Clin. Vaccine Immunol. ALL ASM JOURNALS

Copyright © 2001 by the American Society for Microbiology. All rights reserved.