小中大不同T细胞亚群分泌的细胞因子也不同,IL-2、IFN-γ、TNF-α这3种细胞因子是Th1型细胞因子,而且活化的CTL也可以分泌。IL-2是T淋巴细胞主要的自分泌生长因子,同时也可刺激其它T细胞衍生细胞因子如IFN-γ的产生;IFN-γ与TNF-α的作用相似,可以抑制病毒复制,并且可以增加I类主要组织相容性抗原分子的表达,以此促进CTL介导的病毒感染细胞的杀伤[9],因此在实验中选择了检测上述3种细胞因子。从实验结果显示经免疫表位多肽诱导的CHB患者DC可以在体外诱导特异性效应T细胞活化,并分泌对病毒清除有重要作用的细胞因子。因此理论上,可以将这种经诱导的DC回输至患者体内,可以有望打破机体免疫耐受,清除体内的HBV。
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