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Virologica Sinica, 22 (6) : 501-508, 2007
Research Article
Frequency and Absolute Number of FoxP3+ Regulatory T Cells Correlate with Disease Progression of Chronic HIV-1 Infection
1.Research Center of Biological Therapy, Beijing Institute of Infectious Diseases, Beijing 302 Hospital, 100 Xi Si Huan Middle Road, Beijing 100039, China
2. Postgraduate Team,Military Postgraduate Medical College, Beijing 100853, China
3. Department of Infectious Diseases, Beijing You-An Hospital Affiliated to Capital University of Medical Science, Beijing 100054, China
 Correspondence:
(407.42KB)  
Abstract
CD4+CD25+ Regulatory T cells (Treg) have been found to down-regulate immune activation in HIV-1 infection. However, whether the depletion of Treg benefits to the disease status of HIV infection remains undefined. To address this issue, we enumerated the Treg absolute counts and frequency in 75 antiviral-na?ve HIV-1-infected individuals in this study. It was found that HIV-infected patients displayed a significant decline in Treg absolute counts but a significant increase in Treg frequency. In addition, with disease progression indicated by CD4 T-cell absolute counts, circulating Treg frequency gradually increased; while Treg absolute counts were gradually decreased, suggesting that the alteration of Treg number closely correlated with disease progression in HIV infection. Functional analysis further showed that Treg efficiently inhibit both CD4 and CD8 T cell proliferation in vitro. Thus, our findings indicates that Treg actively participate in pathogenesis of chronic HIV infection, influencing the disease progression.
  Published online: 25 Dec 2007
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