艾滋病患者T淋巴细胞表面归巢分子的表达在抗病毒治疗后升高

摘要

目的 探讨艾滋病(AIDS)患者高效抗反转录病毒治疗(HAART)前后T淋巴细胞表面归巢分子CD49d、CCR9、CD62L表达的变化情况.方法 采用流式细胞术检测42例艾滋病患者和18例HIV阴性健康对照的外周血T淋巴细胞表面CD49d、CCR9和CD62L表达,用BD FACSDiva软件分析计算各组细胞表达的百分率.结果 治疗后组外周血的平均CD4~+T淋巴细胞明显高于治疗前组(P<0.01);治疗前组CD3~+CD49d~+、CD3~+ CCR9~+、CD3~+CD62L~+、CD3~+CD4~+、CD4~+CD49d~+、CD4~+CCR9~+、CIM~+CD62L~+、CD8~+CD49d~+、CD8~+CD62L~+T淋巴细胞的百分率显著低于治疗后组和阴性对照组(P<0.05);CD3~+CD8~+T淋巴细胞的百分率高于治疗后组(P<0.05).治疗后组CD3~+CCR9~+、CD8~+CCR9~+、CD8~+CD62L~+T淋巴细胞的百分率均低于阴性对照组(P均<0.001).结论 AIDS患者外周血T淋巴细胞亚群不仅比例失调,而且其表面表达肠道归巢分子CD49d、CCR9,淋巴结归巢分子CD62L的数量发生异常改变.抗病毒治疗可以逆转以上部分免疫病理变化.建议肠道归巢分子CD49d、CCR9和淋巴结归巢分子CD62L可作为艾滋病疾病进展和评价机体HAART后免疫重建的指标.%Objective To evaluate the homing molecules expression of CD49d, CCRg, CD62L on T lymphocytes in AIDS patients before and after treatment with HAART. Methods The study was per-formed in 42 cases of AIDS patients and 18 cases of healthy controls. The expression of CD49d, CCR9 and CD62L on T lymphocytes in AIDS patients and healthy controls were analyzed by flow cytometry. Software BD FACSDiva was used to calculate the percentage of expression. Results The number of peripheral CD4~+ T lymphocytes in group on-HAART was significantly increased compared with group pre-HAART (P<0.01) ; the frequency of CD3~+ CD49d~+, CD3~+CCR9~+, CD3~+CD62L~+, CD3~+CD4~+, CD4~+CD49d~+,CD4~+CCR9~+, CD4~+CD62L~+, CD8~+CD49d~+, CD8~+CD62L~+T lymphocyte in group pre-HAART were statistically decreased compared with group on-HAART and controls(P<0.05) ; The frequency of CD3~+ CD8~+ T lymphocytes was significantly increased compared with group on-HAART(P<0.05) ; the frequency of CD3~+ CCR9~+, CD8~+CCR9~+, CD8~+CD62L~+ T lymphocytes in group on-HAART were significantly de-creased than controls (P<0.001). Conclusion Not only the number of T lymphocytes sub-group, but the expression rate of gut homing molecules CD49d and CCR9, lymph node homing molecule CD62L on T lym-phocytes was changed in AIDS patients : the lower expression frequency of gut homing molecules CD49d and CCR9, lymph node homing molecule CD62L. Anti-virus therapy could partially reverse the immunologic pathological phenomena. CD49d, CCR9 and CD62L may be suggested to indicate the progression of AIDS and immunologic reeonstitution after HAART.