Alterations of CD4(+) CD25(+) Foxp3(+) regulatory T cells in HIV-infected slow progressors of former blood donors in China.

Abstract:

:Our objective was to study the alterations of CD4(+) CD25(+) Foxp3(+) T(regs) in HIV-infected SPs and to examine the role of T(regs) in the disease progression of HIV. The proportion of CD4(+) CD25(+) Foxp3(+) T(regs) in peripheral blood of 24 SPs, 30 asymptomatic HIV-infected patients, 20 AIDS patients, and 16 non-infected controls was quantified using flow cytometry. HIV Gag peptide mix-induced IFN-γ expression in CD8(+) T cells in whole and CD25-depleted PBMCs was examined to evaluate the function of T(regs) . The expression of CTLA-4 in T(regs) was also detected to measure the suppressive effect of T(regs) . HLA-DR and CD38 expression were measured to study the relationship between the frequency of T(regs) and immune activation of HIV-infected patients. The frequency of CD4(+) CD25(+) Foxp3(+) regulatory T cells in SPs was lower than in asymptomatic HIV-infected patients, AIDS patients, and normal controls (P < 0.05). T(regs) in SPs showed lower intracellular CTLA-4 expression than those of asymptomatic HIV-infected patients and AIDS patients (P < 0.05). The frequency of T(regs) significantly correlated with the percentage of CD38 expression on CD4(+) and CD8(+) T cells (P < 0.05). Multivariate regression analysis showed that the CD4(+) T cell count was the strongest independent factor correlated with the absolute count of T(regs) , while viral load had the strongest predictive strength on the proportion of T(regs) . We conclude that a lower frequency of T(regs) and intracellular CTLA-4 expression of T(regs) was one of the characteristics of SPs that may have important clinical impacts for the prediction of the clinical progress of HIV infection.

journal_name

Microbiol Immunol

authors

Zhang Z,Jiang Y,Zhang M,Liu J,Sun G,Shi W,Wang Y,Shang H

doi

10.1111/j.1348-0421.2010.00259.x

subject

Has Abstract

pub_date

2010-10-01 00:00:00

pages

625-33

issue

10

eissn

0385-5600

issn

1348-0421

journal_volume

54

pub_type

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