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目的:探讨下调miR-181a对人胃癌细胞生物学行为的影响。方法:转染miR-181ainhibitor下调miR-181a在人胃癌细胞SGC-7901中的表达。通过MTT法、流式细胞仪、Annexin-V+PI双染色法和Tr-answell实验,观察下调miR-181a表达对人胃癌细胞增殖、凋亡及侵袭迁移等生物学行为的影响。结果:瞬时转染miR-181ainhibitor后胃癌细胞SGC-7901中miR-181a的表达明显下调(P=0.0027)。转染miR-181ainhibitor后7901细胞增