【摘要】 目的:探讨γ-干扰素(IFN-γ)对肿瘤坏死因子相关凋亡诱导配体(TRAIL)抑制人大肠癌细胞株作用的影响。方法:以大肠癌细胞株RKO为对象,采用MTT比色法和流式细胞术研究IFN-γ对TRAIL抑制RKO的影响。结果:IFN-γ组、TRAIL组和IFN-γ72h+TRAIL组的存活分数分别为99·28%、85·45%、52·60%。IFN-γ组、TRAIL组、IFN-γ24h+TRAIL组、IFN-γ48h+TRAIL组和IFN-γ72h+TRAIL组的凋亡率分别为1·51%、2·38%、4·97%、13·30%、21·00%。IFN-γ24h+TRAIL组的凋亡率高于IFN-γ组与TRAIL组的凋亡率之和(P<0·01)。随着IFN-γ预处理时间的延长,TRAIL引起RKO的凋亡率也明显上升(P<0·01)。结论:IFN-γ能有效加强TRAIL对RKO细胞株的凋亡诱导作用。更多还原

【Abstract】 AIM: To explore the influence of IFN-γ on the role of tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) in inducing apoptosis of RKO cell line. METHODS: Survival fraction and apoptosis were measured by MTT method and flow cytometry (FACS). RESULTS: Survival fraction of IFN-γ group, TRAIL and IFN-γ 72 h+TRAIL group were 99.28%, 85.45%, 52.60%, respectively. The percentage of apoptotic cells of IFN-γ group, TRAIL group, IFN-γ 24 h+TRAIL group, IFN-γ 48 h+TRAIL and IFN-γ 72 h+TRAIL group were 1.51%, 2.38%, 4.97%, 13.30%, 21.00%, respectively. The percentage of apoptotic cells of IFN-γ 24 h+TRAIL group was higher than the sum of IFN-γ group and TRAIL group (P<0.01). The longer the IFN-γ pretreated, the higher the percentage of apoptotic cells was observed (P<0.01). CONCLUSION: IFN-γ can reinforce the effect of TRAIL inducing apoptosis in RKO.更多还原