中文摘要：

目的：探讨MACC1（metastasis-associated in colon cancer l）基因特异性siRNA（small interfering RNA）对肺癌细胞系SBC-5体外增殖和迁移的影响。方法：化学合成MACC1基因特异性siRNA,阳离子脂质体LipofectamineTM 2000转染肺癌细胞系SBC-5细胞,RT-PCR和Western blot方法检测转染后SBC-5细胞中MACC1基因和蛋白的表达情况;MTT法检测细胞的生长增殖状况;划痕试验观察细胞迁移能力的改变。结果：MACC1基因特异性siRNA转染细胞后,SBC-5细胞MACC1的mRNA和蛋白表达水平明显降低,MTT试验和划痕试验观察到转染MACC1-siRNA的SBC-5细胞增殖、迁移能力明显减弱。结论：MACC1基因特异性siRNA可以明显抑制肺癌SBC-5细胞增殖和迁移,MACC1可能成为肺癌治疗的新靶点。

英文摘要：

Objective：To investigate the influence of siRNA targeting metastasis-associated in colon cancer l（MACC1） gene on proliferation and migration of human lung cancer cell line SBC-5 in vitro.Methods：The siRNA targeting MACC1 gene and negative control siRNA were chemically synthesized,and were then transiently transfected into human lung cancer cell line SBC-5 by LipofectamineTM 2000.Expression of MACC1 mRNA and protein in siRNA transfected cells were examined by RT-PCR and Western blotting analysis.Proliferation and migration of siRNA transfected SBC-5 cells were examined by MTT and Wound healing assay.Results：Transfection of specific siRNA targeting MACC1 into SBC-5 cells inhibited MACC1 gene expression and both mRNA and protein expression levels declined markedly.siRNA transfected SBC-5 cells showed decreased ability of proliferation and migration.Conclusion：The specific siRNA targeting MACC1 gene can significantly inhibit proliferation and migration of SBC-5 cells,MACC1 may serve as a potential target for gene therapy of lung cancer.