摘要目的 研究中国主要流行的HIV 1型(HIV-1)B/C重组毒株感染者Nef蛋白特异性T淋巴细胞反应特征.方法 队列收集19例感染时间<1年和40例感染时间>3年的HIV-1 B/C重组毒株感染者,通过酶联免疫斑点试验(Elispot)检测其针对HIV-1 B/C重组毒株Nef重叠多肽产生γ干扰素(IFN-γ)的特异性T淋巴细胞反应.结果 15例感染时间<1年的HIV-1 B/C重组毒株感染者产生Nef特异性分泌IFN-γ的T淋巴细胞反应,主要识别氨基酸位置为Nef 83至135内的EVA7081.1、EVA7081.5、EVAT081.6、EVA7081.48共4条多肽;29例(75.2%)感染时间>3年的感染者产生Nef特异性分泌IFN-γ的T淋巴细胞反应,主要识别氨基酸位置为Nef 63至101内的EVA7081.43、EVA7081.44、EVA7081.45、EVA7081.47、EVA7081.48、EVA7081.49共6条多肽.感染时间<1年的感染者平均反应强度为284.13 SFC/106PBMC,感染时间>3年的感染者平均反应强度为152.44 SFC/106PBMC,2组比较差异具有统计学意义(U=91.000,P=0.002).结论 HIV-1 B/C重组病毒感染者在感染时间<1年和>3年时机体均识别HIV-1 Nef的中心区域,其产生IFN-γ的特异性T淋巴细胞反应强度随疾病的进展逐渐减小.

abstractsObjective To analyze characteristics of Nef-specific T lymphocyte responses in Chinese HIV-1 recombinant subtype B/C infectors. Methods 19 HIV-1 recombinant subtype B/C infectors infected within 1 year, 40 chronic infectors infected for more than 3 years were enrolled in this cohort study. Elispot assay was used to observe HIV-1 specific T lymphocyte responses in HIV-1 recombinant subtype B/C infectors. Results Nef-specific T lymphocyte responses of interferon-gamma secretion were identified in 15 Chinese HIV-1 recombinant subtype B/C infectors infected within 1 year. The specific T lymphocytes were mainly targeted at four peptides which span from Nef 83 to 135: EVA7081.1, EVAT081.5, EVA7081.6 and EVAT081.48. Responses were identified in 29(75. 2%) infectors with more than 3 years of infection and the specific T lymphocytes were mainly targeted at three peptides which span from Nef 63 to 101 : EVA7081.43, EVA7081.44, EVAT081.45, EVA7081.47, EVA7081.48 and EVA7081.49. The average magnitude of response in infectors with less than 1 year of infection was 284. 13 SFC/106 PBMC. The average magnitude of response in infectors with more than 3 years of infection was 152. 44 SFC/106 PBMC. There was a significant difference between the two groups (U = 91. 000, P = 0. 002). Conclusions HIV-1recombinant subtype B/C infectors at different stages of diseases (less than 1 year and more thank 3 years) can recognize central region of Nef. The magnitude of Nef-specific IFN-γ secretion T lymphocyte responses in this cohort gradually decrease with disease progression.