肿瘤坏死因子相关配体与阿司匹林合用对肝癌SMMC-7721细胞凋亡的影响

目的 观察肿瘤坏死因子相关的凋亡诱导配体(TRAIL)与阿司匹林合用对肝癌SMMC-772l细胞的作用。方法 氨甲喋呤法检测SMMC-772l细胞存活分数；流式细胞仪检测SMMC-772l细胞的凋亡率和细胞周期；WesternBlot法检测凋亡相关基因的表达。结果 单用300ng／ml TRAIL、3、10mmol／L阿司匹林SMMC-772l细胞存活分数分别为82．76％、81．34％和71．29％，合用的存活分数分别为43．5％、37．8％。3、l0mmol／L阿司匹林与300ng／ml TRAIL合用诱导的细胞凋亡率明显大于单用两药诱导的细胞凋亡率之和(单用300ng／ml TRAIL、3mmol／L和10mmol／L阿司匹林凋亡率分别为21．25％、1．89％和6．08％，合用的凋亡率分别34．76％，38．56％)并使G0/Gl期细胞增加l3、10mmol／L的阿司匹林使SMMC-772l细胞Bcl-2的表达明显减弱，但对Bax的表达无影响。结论 TRAlL与阿司匹林合用对肝癌SMMC-772l细胞有明显的协同杀伤作用，其机制可能与阿司匹林抑制Bcl-2的表达有关。

Cooperative anti-tumor effect of aspirin and TNF-related apoptosis-inducing ligand

Objective To observe the anti-tumor effect of combination TNF-related apoptosis-inducing ligand (TRAIL) with aspirin on liver cancer cell line, SMMC-7721. Methods The survival fraction of SMMC-7721 cells was measured by MTT assay, apoptosis rate and cell cycle was determined by flow cytometry, and the expression of apoptosis-related gene was identified by western blot. Results The survival fraction of SMMC-7721 cells treated with 300 ng/ml TRAIL, 3 mmol/L or 10 mmol/L aspirin alone was 82.76%, 81.34% and 71.29% respectively, and the survival fractions of SMMC-7721 cells treated with TRAIL and 3 mmol/L or 10 mmol/L aspirin were 43.54% and 37.8% respectively. The apoptosis rates of SMMC-7721 cells induced by TRAIL and 3 mmol/L or10 mmol/L aspirin were higher than that induced by TRAIL or aspirin alone (34.76% and 38.56% vs 21.25%, 1.89% and 6.08%), and G0/G1 arrest was observed under TRAIL and aspirin. The expression of Bcl-2 in SMMC-7721 cells treated by 3 mmol/L or 10 mmol/L aspirin decreased markedly, but no effect on Bax. Conclusion The cooperative anti-tumor effect of aspirin and TRAIL may be related to the inhibition of the expression of Bcl-2 by aspirin.