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IL-12在约氏疟原虫感染小鼠保护性免疫应答中发挥关键作用

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摘要 为研究IL-12在P.yoelii 17XL感染过程中的作用,以P.yoelii 17 XL感染DBA/2和BALB/c小鼠, 制备薄血膜,吉姆萨染色,计数红细胞感染率;无菌取出感染前和感染后不同时间小鼠脾脏并收集血清,培养脾细胞。应用ELISA方法检测小鼠血清中IFN-γ和IL-12水平,Griess法检测脾细胞培养上清中NO含量。结果表明,DBA/2小鼠的虫体血症峰值水平明显低于BALB/c小鼠,并于感染后第20天左右自愈;BALB/c小鼠于虫体血症达到峰值水平后全部死亡;DBA/2和BALB/c小鼠的IFN-γ、IL-12水平于感染后1天即出现升高,其中DBA/2小鼠的IFN-γ、IL-12水平持续到第20天;DBA/2小鼠脾细胞培养上清中NO的水平于感染后3天开始升高,第6天达峰值,而BALB/c小鼠的NO水平未见升高。结论:DBA/2小鼠通过感染早期Th1细胞免疫应答的有效建立,能够抑制虫体血症,IL-12是启动并维持,Th1细胞免疫应答的关键性细胞因子。
出处 《沈阳部队医药》 2005年第3期162-164,共3页
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