摘要
目的 探讨姜黄素对人肺腺癌细胞 (SPC A1 )抗癌作用机制。方法 采用细胞培养、荧光显微镜、原位末端标记、放射免疫、原位杂交等技术 ,探讨姜黄素抗癌作用及其机制。结果 ①姜黄素作用于癌细胞后 ,光镜下可见有细胞脱壁 ,悬浮培养液中 ;荧光镜下可见细胞核破碎 ,裂解成大小不等的凋亡小体 ,原位末端标记法进一步证实 2 0 μmol·L- 1 姜黄素作用 2 4h凋亡率达 42 67%。②姜黄素作用于癌细胞后 ,使细胞内cAMP浓度升高。③ 2 0 μmol·L- 1 姜黄素作用于癌细胞 2 4h后 ,使人肺癌细胞半胱氨酸蛋白酶 8(Caspase 8)mRNA表达明显增高。结论 姜黄素可诱导人肺癌细胞凋亡 ,其作用机制可能与细胞内cAMP浓度升高、Caspase
AIM To investigate the mechanism of anti-tumor effects of curcumin on human SPC-A1 cells. METHODS Cell culture、fluorescence microscope、TUNEL method and irradiation immunity techniques were used. RESULTS ①By the action of curcumin, SPC-A1 cells grew against the wall and then peeled off gradually;fluorescence microscope showed the nucleus broke into pieces, and cell split into apoptosis bodies in different sizes; The TUNEL method further certified that apoptotic cells reached 42 67% at the concentration of 20 μmol·L -1 curcumin at 24 h. ②The level of intracellular cAMP concentration in the SPC-A1 cells,treated with curcumin, was significantly higher than that of the control group. ③Treated with 20 μmol·L -1 curcumin for 24 h, the expression of Caspase-8 mRNA of human SPC-A1 cells was up-regulated. CONCLUSION Curcumin can induce the apoptosis of SPC-A1 cells, and one of its molecular mechanism may be associated with the rising of the level of intracellular cAMP concentration, and up-regulating expression of Caspase-8.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2003年第8期880-882,共3页
Chinese Pharmacological Bulletin
