【摘要】 目的 观察晚期糖基化终产物(advanced glycosylation end prodrcts,AGE)对人结肠癌细胞株SW-480增殖的影响,并探讨其可能机制。 方法 不同浓度AGE干预SW-480细胞,噻唑蓝(MTT)法比较各组细胞活力,流式细胞术观察AGE对SW-480细胞周期的影响,蛋白质印迹法观察AGE对SW-480细胞CyclinD1表达的影响,端粒重复序列扩增法(telomeric repeat amplification protocol,TRAP)银染法观察AGE对SW-480细胞端粒酶活性的影响。MTT测细胞活力的检测设置空白对照组、100 μg/mL小牛血清白蛋白(bovine serum albumin,BSA)组及50、100、500 μg/mL AGE组,其余检测只设置100 μg/mL BSA组和100 μg/mL AGE组。 结果 MTT结果示AGE促进SW-480细胞的增殖,且呈浓度依赖性。100 μg/mL BSA组与100 μg/mL AGE组72 h后的细胞G0/G1期所占百分比分别为56.02%±0.58%、51.93%±1.01%,差异有统计学意义(P lt;0.05)。蛋白质印迹法示100 μg/mL AGE组72 h后CyclinD1的表达较100 μg/mL BSA组增加,差异有统计学意义(P lt;0.05)。TRAP银染法检测示100 μg/mL AGE干预SW-480细胞72 h后可以增加端粒酶活性(P lt;0.05)。 结论 AGE可促进人结肠癌细胞SW-480生长,呈剂量依赖性。其作用机制可能与AGE上调CyclinD1的表达加速G1/S期转换及增加端粒酶活性有关。
【Abstract】 Objective To observe the effects of advanced glycosylation end products (AGE) on proliferation of SW-480 cells and study the possible mechanism. Methods Various concentrations of AGE were designed to have impact on SW-480 cells. Proliferation of SW-480 cells was assessed by thiazolyl blue tetrazolium bromide (MTT) assay; The impact of AGE on the cell cycle of SW-480 cells was analyzed by flow cytometry (FCM); the influence of AGE on expression of CyclinD1 was checked by Western blotting; and the impact of AGE on telomerase activity was examined by telomeric repeat amplification proctol (TRAP) sliver staining. For the MTT assay, blank control group, 100 μg/mL bovine serum albumin (BSA) group, 50, 100 and 500 μg/mL AGE groups were designed, while for other examinations, there were only 100 μg/mL BSA group and 100 μg/mL AGE group. Results MTT result showed that AGE increased the proliferation of SW-480 cells in a dose-dependent mode. The proportion of the cells at G0/G1 stage of the 100 μg/mL BSA group and the 100 μg/mL AGE experimental group were (56.02±0.58)% and (51.93±1.01)% respectively after 72 hours, with a significant difference (P lt;0.05); western blotting showed that the expression of CyclinD1 in the 100 μg/mL AGE group was significantly higher than that in the 100 μg/mL BSA group after 72 hours; TRAP silver staining demonstrated that telomerase activity increased significantly after treated with 100 μg/mL AGE for 72 hours. Conclusions AGE can promote the growth of SW-480 cells in a dose-dependent mode. Its mechanism is mainly by up-regulating the expression of CyclinD1 to shorten G0/G1 and increasing the telomerase activity significantly.
Citation: ZHOU Xiaozhi,XUE Yaoming,GUAN Meiping,ZHU Bo. Effects of Advanced Glycosylation End Products on Proliferation of Human Colon Carcinoma Cell Line SW-480 and Its Mechanism. West China Medical Journal, 2011, 26(6): 837-841. doi: Copy