摘要
目的为了进-步增强HIVDNA疫苗的免疫反应，本研究将IL—17作为HIVDNA疫苗的分子佐剂免疫小鼠，旨在探讨IL-17对HIVDNA疫苗诱导体液和细胞免疫应答的影响。方法将小鼠IL-17构建到真核表达载体，与HIV-1膜蛋白DNA疫苗pGX-Env联合免疫BALB／c小鼠；分别在第0、2周进行免疫，在第4周检测T淋巴细胞增殖指数、抗-EnvIgG、细胞因子表达水平和体内细胞毒性T淋巴细胞杀伤作用（CTL）等免疫学指标。结果IL-17能够增强HIVDNA疫苗的特定免疫反应。与单注射疫苗组相比，IL-17作为佐剂组的T细胞增殖、抗体水平和CD4＋T细胞分泌IFN-γ、IL-4和IL-17的表达均无明显增强，但对CD8＋T细胞分泌IFN-γ的表达和体内CTL的效果影响明显（P〈0．05）。结论IL-17作为分子佐剂不足以影响Th细胞分化，然而却能够增强特异性CD8＋T细胞中IFN-γ的表达，尤其是增强体内CTL反应。此结果为增强艾滋病DNA疫苗CD8＋T细胞活性和用于艾滋病的治疗提供了-个新的思路。
Objective To investigate IL-17 as adjuvant effect on the humoral and cellular immune responses to HIV DNA vaccine by immunizing mice with HIV DNA vaccine plus IL-17. Methods We immunized the BALB/c mice with pGX-Env alone, or with pcDNA3-IL-17 by intramuscular injection. The immunization was performed on week 0, 2. The concentration of the anti-Env IgG, the stimulated index of T lymphocyte proliferation, and the expression of IFN-γ, IL-4 and IL-17 in CD4＋ T cell and IFN-γ, in CD8 ＋ T cell, specific in vivo cytotoxic T lymphocyte （CTL） activity were detected at week 4. Results We show here that IL-17 as a molecular adjuvant with the HIV DNA vaccine, pGX-Env, can enhance immune responses. Interestingly, IL-17 has no adjuvant effect on the responses for T cell proliferation, antibody production and expressions of IFN-γ, IL-4 and IL-17 in CD4＋ T cells, but rather on the up-regulation of IFN-γ in CD8 ＋ T cells and CTL in vivo significantly （ P 〈 0.05 ）. Conclusion The data suggest that IL-17 as the molecular adjuvant may not affect the development and differentiation of CD4 ＋ Th cells, but directly affect on the CD8 ＋ T cell functions. The novel functionality of IL-17 on adaptive immunity may lead to develop effective HIV DNA vaccination targeted to potentiate the CD8 ＋ T cell functions.
出处
《中华微生物学和免疫学杂志》
CAS
CSCD
北大核心
2010年第3期256-262,共7页
Chinese Journal of Microbiology and Immunology
基金
基金项目：国家科技部艾滋病和病毒性肝炎等重大传染病防治项目资助（2008ZX10001-012）
