Journal
JOURNAL OF VIROLOGY
Volume 83, Issue 17, Pages 8470-8481Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.02568-08
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Funding
- NIH [AI43222]
- Doris Duke Charitable Foundation
- Howard Hughes Medical Institute
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Highly active antiretroviral therapy (HAART) can reduce human immunodeficiency virus type 1 (HIV-1) viremia to clinically undetectable levels. Despite this dramatic reduction, some virus is present in the blood. In addition, a long-lived latent reservoir for HIV-1 exists in resting memory CD4(+) T cells. This reservoir is believed to be a source of the residual viremia and is the focus of eradication efforts. Here, we use two measures of population structure-analysis of molecular variance and the Slatkin-Maddison test-to demonstrate that the residual viremia is genetically distinct from proviruses in resting CD4(+) T cells but that proviruses in resting and activated CD4(+) T cells belong to a single population. Residual viremia is genetically distinct from proviruses in activated CD4(+) T cells, monocytes, and unfractionated peripheral blood mononuclear cells. The finding that some of the residual viremia in patients on HAART stems from an unidentified cellular source other than CD4(+) T cells has implications for eradication efforts.
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