摘要目的 比较MF59和铝佐剂在HIV-1多表位蛋白MEP1小鼠体内诱导的免疫应答的异同,确定一种能诱导高水平免疫应答的佐剂配方.方法 将MEP1蛋白与MF59或铝佐剂制备成免疫原,肌肉注射BALB/c雌性小鼠,分别在初次免疫和三次免疫后10 d分离血清和单个脾细胞,通过间接ELISA检测小鼠血清特异性抗MEP1抗体及亚类,ELISPOT检测脾脏分泌IFN-γ及IL-4淋巴细胞数量,比较两种佐剂诱导的体液和细胞免疫应答的异同.结果 单次免疫后,铝佐剂相较MF59能更快促进MEP1诱导早期的体液和细胞免疫应答;三次免疫后,铝佐剂和MF59在促进MEP1诱导Th2偏倚的体液免疫应答的同时,MF59促进MEP1诱导Th1/Th2平衡的细胞免疫应答.结论 铝佐剂相较于MF59更适合作为HIV-1多表位蛋白MEP1的佐剂.

abstractsObjective To compare the adjuvant activity of oil-in-water emulsion MF59 and aluminum hydroxide on immune responses to HIV-1 multi-epitope protein MEP1 in BALB/c mice. Methods HIV-1 multi-epitope protein MEP1 with MF59 or aluminum was prepared to intramuscularly vaccinate female BALB/c mice for three times. Serum and splenocytes were isolated from the mice 10 d after the first and last vaccination. Specific anti-MEP1 antibodies and the subclasses in serum were detected by ELISA. The num-bers of splenic lymphocytes secreting IFN-γ and IL-4 were measured by ELISPOT. Differences in humoral and cellular immune responses induced by the two different adjuvants were compared. Results After a sin-gle-dose immunization, aluminum adjuvant promoted early humoral and cellular immune responses to MEP1 compared with MF59. After the three-dose immunization, both aluminum adjuvant and MF59 promoted MEP1 to induce Th2-biased humoral immune response, while MF59 also enhanced a balanced Th1/Th2 cel-lular immune response. Conclusions Aluminum adjuvant was a more suitable adjuvant than MF59 for HIV-1 multi-epitope protein MEP1.