Activation and coreceptor expression of T lymphocytes induced by highly active antiretroviral therapy in Chinese HIV/AIDS patients.

Abstract:

BACKGROUND:At the end of 2005, 650,000 people lived with human immunodeficiency virus type-1 (HIV-1) in China, of whom 75 000 were AIDS patients. Many AIDS patients received highly active antiretroviral therapy (HAART) supported by the "China CARES" program but the immune responses of HAART were seldom reported. This study investigated the effect of HAART on the activation and coreceptor expression of T lymphocytes in Chinese HIV/AIDS patients and evaluated its effect on immune reconstitution. METHODS:Seventeen HIV/AIDS patients were enrolled and three-color-flow cytometry was used to detect the activation of HLA-DR CD38 and the coreceptor CCR5, CXCR4 expression on T lymphocytes in whole blood samples taken from the patients before and after 3- or 6-month HAART. RESULTS:The activation percents of CD4(+), CD8(+) T lymphocytes were significantly higher before therapy than the normal controls (HLA-DR/CD4: 40.47 +/- 18.85 vs 11.54 +/- 4.10; CD38/CD4: 81.34 +/- 10.86 vs 53.34 +/- 11.44; HLA-DR/CD8: 63.94 +/- 12.71 vs 25.67 +/- 9.18; CD38/CD8: 86.56 +/- 11.41 vs 58.84 +/- 6.16, all P < 0.01). After 6-month combined antiretroviral treatment, the activation of T lymphocytes in HIV/AIDS patients was significantly decreased (HLA-DR/CD4: 28.31 +/- 13.48; CD38/CD4: 69.88 +/- 12.64; HLA-DR/CD8: 46.56 +/- 18.64; CD38/CD8: 70.17 +/- 14.54, all P < 0.01 compared with the pre-treatment values). Before the treatment, CCR5 expression on CD8(+) T lymphocytes was up-regulated while CXCR4 expression on CD8(+) T lymphocytes downregulated in HIV/AIDS patients compared with the normal controls (CD8/CCR5: 70.91 +/- 10.03 vs 52.70 +/- 7.68; CD8/CXCR4: 24.14 +/- 11.08 vs 50.05 +/- 11.68, all P < 0.01). After 6-month HAART, CCR5 expression on CD8(+) T lymphocytes significantly decreased (56.35 +/- 12.96, P < 0.01), while CXCR4 expression on CD8(+) T lymphocytes increased (36.95 +/- 9.96, P < 0.05) compared with the pre-treatment and the normal controls. A significant statistical relationship was observed between the expression of activation markers, CCR5 and the CD4(+) T lymphocyte counts after HAART (P < 0.05). CONCLUSIONS:Reduced activation of T lymphocytes and a normalization of coreceptor expression were observed in Chinese HIV/AIDS patients after HAART. Immunity can be restored in HIV/AIDS patients receiving HAART.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Zhang ZN,Shang H,Jiang YJ,Liu J,Dai D,Diao YY,Geng WQ,Jin X,Wang YN

subject

Has Abstract

pub_date

2006-12-05 00:00:00

pages

1966-71

issue

23

eissn

0366-6999

issn

2542-5641

journal_volume

119

pub_type

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