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J Clin Microbiol. 1990 Oct;28(10):2362-4.

Human herpesvirus 6 inhibits human immunodeficiency virus type 1 replication in cell culture.

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Cancer Research Institute, School of Medicine, University of California, San Francisco 94143.


The SF strain of human herpesvirus 6 (HHV-6SF) isolated from the saliva of a human immunodeficiency virus (HIV)-infected individual was shown to inhibit HIV type 1 (HIV-1) replication in both peripheral blood mononuclear cells and purified CD4+ lymphocytes. This suppression of HIV-1 replication led to decreased cytopathic effects of HIV-1 and prolonged survival of CD4+ cells in culture. Even low levels of HHV-6 added to peripheral blood mononuclear cells showed an inhibitory effect on HIV-1 replication. These results differ from those previously reported showing enhanced HIV-1 production following infection with another strain of HHV-6.

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