Low CD4+ T Cell Nadir Is an Independent Predictor of Lower HIV‐Specific Immune Responses in Chronically HIV‐1–Infected Subjects Receiving Highly Active Antiretroviral Therapy
1Infectious Diseases Unit, Department of Medicine, and 2Department of Microbiology and Immunology, Vanderbilt University Medical Center, and 3Department of Biostatistics, Vanderbilt University, Nashville, Tennessee; 4Partners AIDS Research Center, Massachusetts General Hospital, Boston; 5AIDS Clinical Trial Group Operations Center, Silver Spring, Maryland; 6University of California–San Francisco, San Francisco; 7New York University Medical Center, New York, New York
The influence of CD4+ T cell nadirs on human immunodeficiency virus (HIV)–specific immune responses in subjects with apparently normal CD4+ T cell counts is not known. We evaluated the frequency of HIV‐1–specific immune responses in a cohort of patients with complete viral suppression (HIV‐1 RNA load, <50 copies/mL) who were receiving highly active antiretroviral therapy and had a wide range of CD4+ T cell nadirs. We found positive associations between CD4+ T cell nadirs and the magnitude of HIV‐specific CD8+ T cell responses (
) and of T cell helper responses (
). These data show the CD4+ T cell nadir to be an independent predictor of HIV‐specific CD4+ and CD8+ T cell responses in HIV‐1–infected subjects with optimal suppression of viremia.
Received 8 December 2005; accepted 29 March 2006; electronically published 28 July 2006.
Cited by
Online publication date: 21-Jul-2009.
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Online publication date: 1-Jan-2009.
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Potential conflicts of interest: none reported.
Financial support: National Institutes of Health (grants R01 AI39966 to S.A.K., 5U01AI027665 to F.V., program P30 AI 54999 to the Vanderbilt‐Meharry Center for AIDS Research and P30 AI 027742 to the New York University Center for AIDS Research); OPO Foundation, Zurich, Switzerland (support to M.A.S.); Elizabeth Glaser Pediatric AIDS Foundation (Elizabeth Glaser Scientist Award to S.A.K.).





