Abstract

背景与目的肺癌是世界上最常见的恶性肿瘤,其中小细胞肺癌是恶性程度最高的亚型,具有生长迅速、早期转移和高度血管化等特点。阿帕替尼(Apatinib)是我国自主研发的血管内皮生长因子受体2抑制剂,在多种实体瘤中疗效显著。本研究旨在探讨Apatinib对小细胞肺癌细胞株NCI-H446的体外作用以及联合哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin, mTOR)抑制剂CCI-779对小细胞肺癌的体外作用。方法体外培养小细胞肺癌细胞株NCI-H446,CCK8法、细胞凋亡实验、细胞周期实验及Transwell实验检测Apatinib及联合mTOR抑制剂CCI-779对NCI-H446细胞增殖、凋亡、周期及迁移的影响;Western blot实验检测血管内皮生长因子受体和细胞周期相关蛋白的表达。结果CCK8实验结果显示高浓度Apatinib能抑制NCI-H446细胞增殖;细胞凋亡实验结果显示高浓度Apatinib诱导NCI-H446细胞凋亡;Transwell实验结果显示高浓度Apatinib抑制NCI-H446细胞迁移;联合mTOR抑制剂CCI-779后,低浓度Apatinib便能抑制NCI-H446细胞增殖和迁移,诱导细胞凋亡。结论Apatinib对小细胞肺癌细胞株NCI-H446的作用具有浓度依赖性特征,高浓度Apatinib能够抑制NCI-H446细胞增殖和迁移,诱导细胞凋亡,与mTOR抑制剂CCI-779联用能增加NCI-H446细胞对Apatinib的敏感性。

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