bcl-2 expression facilitates human immunodeficiency virus type 1-mediated cytopathic effects during acute spreading infections

Paul A. Sandstrom, Diane Pardi, Cynthia S. Goldsmith, Duan Chengying, Alan M. Diamond, Thomas M. Folks

    Research output: Contribution to journalArticle

    33 Scopus citations

    Abstract

    The cytopathic effects (CPE) resulting from the infection of CD4+ T cells by human immunodeficiency virus (HIV) have generally been characterized as single-cell killing associated with apoptosis and/or the generation of syncytia resulting from the direct cell-to-cell transmission of the virus. Little is known, however, about the cellular factors influencing host cell susceptibility to HIV-mediated CPE. Because expression of the antiapoptosis gene, bcl-2, enhances cell viability after exposure to cytotoxic agents or stimuli, the effect of bcl-2 expression on HIV infection of stably transfected T-cell clones was investigated. Unexpectedly, bcl-2 expression by these cells accelerated the kinetics of an acute spreading HIV infection, as evidenced by a rapid loss of culture viability associated with the appearance of CPE and reverse transcriptase activity in the culture supernatant. This unexpected effect of bcl-2 expression results from the arrest of syncytial apoptosis, directly facilitating the cell-to-cell transmission of HIV. In addition, bcl-2 expression is associated with enhanced HIV replication as determined by HIV type 1-specific Western blot (immunoblot) analysis. These results suggest that the inhibition of apoptosis is essential for this mode of viral transmission.

    Original languageEnglish (US)
    Pages (from-to)4617-4622
    Number of pages6
    JournalJournal of Virology
    Volume70
    Issue number7
    StatePublished - Jan 1 1996

    ASJC Scopus subject areas

    • Microbiology
    • Immunology
    • Insect Science
    • Virology

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    Sandstrom, P. A., Pardi, D., Goldsmith, C. S., Chengying, D., Diamond, A. M., & Folks, T. M. (1996). bcl-2 expression facilitates human immunodeficiency virus type 1-mediated cytopathic effects during acute spreading infections. Journal of Virology, 70(7), 4617-4622.