目的研究多种细胞因子诱导的杀伤细胞(cytokine-induced killer cells,CIK)对A549肺癌细胞株诱导凋亡作用,并探讨其作用机制。方法应用末端脱氧核苷酸转移酶﹙TdT﹚介导的脱氧核苷酸缺口末端标志(TdT-mediated dUTP nick end labeling,T...目的研究多种细胞因子诱导的杀伤细胞(cytokine-induced killer cells,CIK)对A549肺癌细胞株诱导凋亡作用,并探讨其作用机制。方法应用末端脱氧核苷酸转移酶﹙TdT﹚介导的脱氧核苷酸缺口末端标志(TdT-mediated dUTP nick end labeling,TUNEL)法检测CIK细胞诱导凋亡的情况;通过免疫组织化学染色法检测A549细胞中凋亡相关基因p53、Fas、caspase-3,caspase-8,caspase-9、survivin蛋白,细胞增殖相关蛋白Ki-67的阳性表达率。结果 (1)TUNEL法检测结果:效靶细胞混合培养后,起初随时间延长凋亡细胞逐渐增多,5-14小时凋亡率明显上升,14-24小时凋亡率下降;(2)免疫组织化学染色结果表明,CIK实验组p53、Ki-67、survivin蛋白随作用时间延长而均下降,Fas、caspase-3、caspase-8、caspase-9蛋白表达上调,与对照组比较差异均有统计学意义(P<0.01)。结论 (1)CIK细胞对A549肺癌细胞具有抗增殖及诱导凋亡作用;(2)CIK细胞对A549肺癌细胞的抗增殖作用机制可能与下调Ki-67蛋白的表达,使癌细胞处于静止期有关;(3)CIK细胞对A549肺癌细胞的诱导凋亡作用机制可能与下调p53、survivin蛋白的表达,上调Fas、caspase-3、caspase-8、caspase-9蛋白的表达有关,经由细胞凋亡的死亡受体和线粒体通路完成凋亡的启动和执行;(4)CIK细胞是一种新型高效具有较强杀伤体外肺癌细胞的免疫活性细胞,有可能用于临床上晚期肺癌的过继性免疫治疗。展开更多
Ribosome-inactivating proteins(RIPs) belong to a family of enzymes that attack eukaryotic ribosomes and potently inhibit cellular protein synthesis.RIPs possess several biomedical properties,including anti-viral and a...Ribosome-inactivating proteins(RIPs) belong to a family of enzymes that attack eukaryotic ribosomes and potently inhibit cellular protein synthesis.RIPs possess several biomedical properties,including anti-viral and anti-tumor activities.Multiple RIPs are known to inhibit tumor cell proliferation through inducing apoptosis in a variety of cancers,such as breast cancer,leukemia/lymphoma,and hepatoma.This review focuses on the anti-tumor activities of RIPs and their apoptotic effects through three closely related pathways:mitochondrial,death receptor,and endoplasmic reticulum pathways.展开更多
文摘目的研究多种细胞因子诱导的杀伤细胞(cytokine-induced killer cells,CIK)对A549肺癌细胞株诱导凋亡作用,并探讨其作用机制。方法应用末端脱氧核苷酸转移酶﹙TdT﹚介导的脱氧核苷酸缺口末端标志(TdT-mediated dUTP nick end labeling,TUNEL)法检测CIK细胞诱导凋亡的情况;通过免疫组织化学染色法检测A549细胞中凋亡相关基因p53、Fas、caspase-3,caspase-8,caspase-9、survivin蛋白,细胞增殖相关蛋白Ki-67的阳性表达率。结果 (1)TUNEL法检测结果:效靶细胞混合培养后,起初随时间延长凋亡细胞逐渐增多,5-14小时凋亡率明显上升,14-24小时凋亡率下降;(2)免疫组织化学染色结果表明,CIK实验组p53、Ki-67、survivin蛋白随作用时间延长而均下降,Fas、caspase-3、caspase-8、caspase-9蛋白表达上调,与对照组比较差异均有统计学意义(P<0.01)。结论 (1)CIK细胞对A549肺癌细胞具有抗增殖及诱导凋亡作用;(2)CIK细胞对A549肺癌细胞的抗增殖作用机制可能与下调Ki-67蛋白的表达,使癌细胞处于静止期有关;(3)CIK细胞对A549肺癌细胞的诱导凋亡作用机制可能与下调p53、survivin蛋白的表达,上调Fas、caspase-3、caspase-8、caspase-9蛋白的表达有关,经由细胞凋亡的死亡受体和线粒体通路完成凋亡的启动和执行;(4)CIK细胞是一种新型高效具有较强杀伤体外肺癌细胞的免疫活性细胞,有可能用于临床上晚期肺癌的过继性免疫治疗。
基金the Basic Research Program of Shenzhen(JCYJ20120613113228732)the University Innovation Program of Guangdong Province (201410590040)
文摘Ribosome-inactivating proteins(RIPs) belong to a family of enzymes that attack eukaryotic ribosomes and potently inhibit cellular protein synthesis.RIPs possess several biomedical properties,including anti-viral and anti-tumor activities.Multiple RIPs are known to inhibit tumor cell proliferation through inducing apoptosis in a variety of cancers,such as breast cancer,leukemia/lymphoma,and hepatoma.This review focuses on the anti-tumor activities of RIPs and their apoptotic effects through three closely related pathways:mitochondrial,death receptor,and endoplasmic reticulum pathways.