西黄浸提液抑制胃癌SGC-7901 细胞增殖的可能机制

摘要] 目的：探讨西黄浸提液对胃癌SGC-7901 细胞增殖的影响及其可能机制。方法：常规培养胃癌细胞株SGC-7901，用CCK-8 法和细胞流式细胞术检测不同质量浓度（3.2、6.4、12.8 和25.6 mg/ml）的西黄浸提液在不同时间点（24、48 和72 h）对SGC-7901 细胞增殖和凋亡的影响，用qPCR法检测不同质量浓度西黄浸提液对SGC-7901 细胞凋亡相关基因Bax 和Bcl-2 mRNA表达的影响，用Western blotting 检测西黄浸提液对凋亡相关蛋白caspase 3、caspase 9、Bax和Bcl-2 表达的影响。结果：3.2~25.6 mg/ml的西黄浸提液均能有效地抑制胃癌SGC-7901 细胞的增殖（P<0.05 或P<0.01），并且随浓度增加SGC-7901 细胞凋亡率增加（P<0.01）。西黄浸提液能够显著上调SGC-7901 细胞Bax mRNA和下调Bcl-2 mRNA表达水平（P<0.05 或P<0.01），并可增加caspase3、caspase 9 和Bax 蛋白表达、降低Bcl-2 蛋白表达（P<0.05 或P<0.01）。结论：西黄浸提液通过触发细胞凋亡抑制胃癌SGC-7901细胞的增殖，此可成为一个潜在的胃癌辅助治疗的方法。

Mechanism of Xihuang extract in inhibiting proliferation of gastric cancer SGC-7901 cells

Abstract] Objective: To investigate the effect of Xihuang (XH) extract on the proliferation of gastric cancer SGC-7901 cells and its underlying mechanism. Methods: Gastric cancer cell line SGC-7901 was conventionally cultured. CCK-8 assay and flow cytometry were used to detect the effect of different concentrations of XH extracts (3.2, 6.4, 12.8, and 25.6 mg/ml) on proliferation and apoptosis of SGC-7901 cells after treatment for different time periods (24, 48, and 72 h); The effect of different concentrations of XH extracts on the mRNA expression of apoptosis-related genes (Bax and Bcl-2) was detected by qPCR; Western blotting was used to detect the effect of XH extracts on the expression of apoptosis-associated proteins (caspase 3, caspase 9, Bax and Bcl-2). Results: XH extracts (3.2, 6.4,12.8, and 25.6 mg/ml) could effectively inhibit proliferation of gastric cancer SGC-7901 cells (P<0.05 or P<0.01) in a concentration-depend manner (P<0.01). XH extract could significantly up-regulate Bax mRNA and down-regulate Bcl-2 mRNA expression (P<0.05 or P<0.01); Meanwhile, XH extract ouldincrease protein expressions of caspase 3, caspase 9, Bax but reduce Bcl-2 protein expression (P<0.05 or P<0.01). Conclusion: XH extract can inhibit the proliferation of gastric cancer SGC-7901 cells by triggering apoptosis, which may become a potential method of adjuvant treatment of gastric cancer.