Abstract

背景与目的采用抗肿瘤中药治疗恶性肿瘤是具有中国特色的肿瘤治疗方式。本研究旨在体外筛选出麦门冬合千金苇茎汤抑制人肺癌A549细胞增殖的有效部位,并对其进行分子机制探讨。方法通过MTT法和细胞克隆形成试验体外初步筛选出麦门冬合千金苇茎汤抑制A549细胞增殖的有效部位;流式细胞仪进行细胞周期分析;Hoechst 33258染色观察凋亡形态的变化;Western blot对肺癌相关通路进行检测。结果乙酸乙酯萃取部位可显著抑制肺癌A549细胞的生长,且对正常细胞HFL-1无明显影响;与对照组相比,10 μg/mL乙酸乙酯萃取部位作用后克隆形成抑制率达73.86%(P < 0.01),流式检测凋亡率为33.86%(P < 0.01),荧光显微镜下可见凋亡形态学特征;抗凋亡蛋白EGFR和ERK表达显著下调(P < 0.01)。结论麦门冬合千金苇茎汤乙酸乙酯萃取部位能显著抑制A549细胞的生长,并通过下调EGFR/ERK信号转导通路诱导细胞凋亡,因此应进一步分离,明确复方抗癌作用的物质基础。

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