Upregulation of human DNA binding protein A （dbpA） in gastric cancer cells  

作　　者：Guo-rong WANG Yan ZHENG Xiang-ming CHE Xin-yang WANG Jia-hui ZHAO Kai-jie WU Jin ZENG Chen-en PAN Da-lin HE 

机构地区：[1]Department of General Surgery, First Affiliated Hospital of Medical College of Xi'an Jiaotong University, Xi'an 710061, China [2]Depart- ment of General Surgery, People's Hospital of Shaanxi Province, Xi'an 710068, China [3]Department of Dermatology, Second Affiliated Hospital of Medical College of Xi'an Jiaotong University, Xi'an 710004, China [4]Institute of Urology, First Affiliated Hospital of Medical College of Xi'an Jiaotong University, Xi'an 710061, China

出　　处：《Acta Pharmacologica Sinica》2009年第10期1436-1442,共7页中国药理学报（英文版）

摘　　要：Aim： To determine the effect of human DNA binding protein （dbpA） on the biology of gastric cancer cells. Methods： DbpA expression was analyzed by Western blot analysis and immunofluorescence staining in gastric cancer tissues and cell lines. A dbpA-specific small interference （si） RNA was designed and synthesized. Suppressive effect of siRNA on dbpA expression was assessed by real-time RT-PCR. Transwell migration and colony formation assays were used to assess the inhibitory effects of dbpA siRNA on cell invasion and tumorigenesis in vitro. Drug-sensitivity was evaluated using a conventional 3-（4,5-dJmethylthiazol-2-yl）-2,5- diphenyl tetrazolium bromide （MTT） assay. Results： The expression of dbpA was upregulated in gastric cancer tissues and cell lines as compared to adjacent normal tissues or gastric epithelial cells, siRNA treatment successfully silenced dbpA expression. Silencing of dbpA increased expression of E-cadherin, decreased expression of adenomatous polyposis coil （APC）, β-catenin and cyclin D1, but had no effect on expression of NF-KB. Silenc- ing of dbpA also suppressed cell invasion and colony formation of SGC7901 cells, and enhanced their chemosensitivity to 5-fluoroura- cil. Conclusion： DbpA plays an important role in the pathogenesis and development of gastric cancer, and the process involves E-cadherin, APC, β-catenin and cyclin D1. Silencing of dbpA might be a novel therapeutic strategy for increasing chemosensitivity to 5-fluorouracil in gastric cancer.Aim： To determine the effect of human DNA binding protein （dbpA） on the biology of gastric cancer cells. Methods： DbpA expression was analyzed by Western blot analysis and immunofluorescence staining in gastric cancer tissues and cell lines. A dbpA-specific small interference （si） RNA was designed and synthesized. Suppressive effect of siRNA on dbpA expression was assessed by real-time RT-PCR. Transwell migration and colony formation assays were used to assess the inhibitory effects of dbpA siRNA on cell invasion and tumorigenesis in vitro. Drug-sensitivity was evaluated using a conventional 3-（4,5-dJmethylthiazol-2-yl）-2,5- diphenyl tetrazolium bromide （MTT） assay. Results： The expression of dbpA was upregulated in gastric cancer tissues and cell lines as compared to adjacent normal tissues or gastric epithelial cells, siRNA treatment successfully silenced dbpA expression. Silencing of dbpA increased expression of E-cadherin, decreased expression of adenomatous polyposis coil （APC）, β-catenin and cyclin D1, but had no effect on expression of NF-KB. Silenc- ing of dbpA also suppressed cell invasion and colony formation of SGC7901 cells, and enhanced their chemosensitivity to 5-fluoroura- cil. Conclusion： DbpA plays an important role in the pathogenesis and development of gastric cancer, and the process involves E-cadherin, APC, β-catenin and cyclin D1. Silencing of dbpA might be a novel therapeutic strategy for increasing chemosensitivity to 5-fluorouracil in gastric cancer.

关 键 词：stomach neoplasms CSDA protein  human small interfering RNA fluorouracil 

分 类 号：Q513.1[生物学—生物化学] Q255