摘要
目的探讨TROP2基因在胃癌细胞迁移侵袭过程中的作用。方法用基因克隆技术构建针对TROP2的小干扰RNA(siRNA),瞬时转染胃癌BGC-823细胞系,荧光实时定量PCR和Western blot法检测细胞TROP2mRNA和蛋白表达水平,MTT法测定细胞增殖能力,Transwell小室实验观察细胞迁移侵袭能力。结果酶切鉴定和DNA测序分析显示,TROP2靶向RNA干扰重组质粒构建成功。筛选得到最佳干扰效果质粒,该质粒转染细胞后,细胞增殖和迁移侵袭能力显著下降(P<0.05)。结论干扰TROP2基因具有抑制胃癌BGC-823细胞迁移侵袭的作用,TROP2基因可能成为癌基因靶向治疗的分子靶点。
Objective To investigate the role of TROP2 in migration and invasion of human gastric cancer cells. Methods Small interfering RNA（siRNA）targeting TROP2 gene was constructed by gene cloning and transfection into gastric cancer cell line BGC-823. The expression of mRNA and protein were detected by Real-time quantitative PCR and Western blot assay after RNA interference. The proliferation was determined by MTT assay. Transwell assay was performed to assess the effect of TROP2 targeted RNA interference on the migratory and invasive properties of gastric cancer in vitro. Results Enzyme digestion analysis and DNA sequencing showed that TROP2 targeted RNA interference recombinant plasmids were successfully constructed. The most effective recombinant plasmid was selected. After transfeetion, knockdown of TROP2 significantly inhibited the proliferation, migration and invasion of BGC-823 cells in vitro （P 〈 0. 05）. Conclusion Interfering and down-regulating TROP2 gene can inhibit migration and invasion of gastric cancer cell line BGC-823 in vitro, indicating that TROP2 gene is a potential target for gastric cancer gene therapy.
出处
《基础医学与临床》
CSCD
北大核心
2010年第2期165-169,共5页
Basic and Clinical Medicine
