蛋白激酶C抑制剂staurosporine对人结肠癌COLO320细胞周期的影响

目的 探讨蛋白激酶C(protein kinase c,PKC)抑制剂staurosporine(STS)对人结肠癌细胞株COLO320的增殖抑制、凋亡诱导及对细胞周期的影响.方法 在培养的COLO320细胞中,加20、60及100ng/mL STS和100ng/mL佛波酯(PMA),作用24h后,用MTT法测细胞增殖,流式细胞仪检测细胞凋亡率及细胞周期的变化.结果 STS抑制COLO320细胞生长,24h的IC50为55ng/mL.20、60及100ng/mL STS分别作用细胞24h后,发现G0/G1期细胞分别为(47.30%±1.53%)、(49.50%±1.54%)和(51.60%±2.12%),G2/M期细胞分别为(30.45%±1.32%)、(34.50%±1.23%)和(37.70%±1.82%);100ng/mL PMA组G0/G1期细胞为(57.10%±1.89%),G2/M期细胞为(24.70%±0.35%);空白对照组G0/G1期细胞为(50.60%±1.69%),G2/M期细胞为(1.85%±0.78%).20、60及100ng/mL STS组与100ng/mL PMA组及空白对照组比较,STS使细胞G0/G1期均减少(P<0.05)及G2/M期均明显增加(P<0.01).STS作用24h后细胞的G1期前出现明显的凋亡峰.结论 STS通过抑制PKC的活性,使细胞被阻滞于G2期,从而抑制COLO320细胞的增殖及诱导细胞凋亡.

Effect of staurosporine on cell cycle of human colon cancer cells

Objective] To investigate the effect of PKC inhibitor staurosporine (STS) on the inhibition of proliferation, the induction of apoptosis, and the change of cell cycle in human colon cancer line COLO 320. Methods] COLO320 cells were treated by PKC inhibitor Staurosporine(STS) for 24 hours, the inhibition rates of cell proliferation were evaluated by MTT assay. The apoptotic peaks of the cells and the changes of cell cycle were analyzed using flow cytometry. Results] Staurosporine inhibited cell growth of ...