期刊
JAIDS-JOURNAL OF ACQUIRED IMMUNE DEFICIENCY SYNDROMES
卷 54, 期 5, 页码 447-454出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/QAI.0b013e3181e0c7d0
关键词
ART; CD8(+); T cells; HIV-1; immune activation; immune exhaustion
资金
- National Institute of Allergy and Infectious Diseases (NIAID) [U01 AI068632]
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- National Institute of Mental Health (NIMH) [AI068632]
Background: Chronic HIV-1 infection is associated with excessive immune activation and immune exhaustion. We investigated the relationship of these 2 phenotypes and frequency of regulatory T cells (Tregs) in controlled and uncontrolled chronic HIV-1 infection. Methods: Immune exhaustion marker PD-1, its ligand PD-L1, CD4(+) CD25(bright) FoxP3(+) Tregs, HLA-DR, and CD38 coexpression as activation markers were investigated in peripheral blood lymphocytes of 44 HIV-1-infected patients and 11 HIV-1-uninfected controls by multicolor flow cytometry. Results: Activated and PD-1 expressing T cells were increased, and Tregs were decreased in HIV-1-infected patients as compared with controls, and alterations were greatest in viremic patients. The proportion of activated CD8(+) T cells exceeded activated CD4(+) T cells. Tregs had an inverse correlation with activated T cells and PD-1 expressing T cells. PD-L1 was highly expressed on monocytes and to a lesser extent on T lymphocytes of patients. These abnormalities partially reversed with virologic control after potent antiretroviral therapy. Conclusions: Immune exhaustion is a component of aberrant immune activation in chronic HIV-1 infection and is associated with loss of Tregs and ongoing virus replication. These defects are corrected partially with effective virologic control by potent antiretroviral therapy.
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