摘要
目的：探讨 8-Br-cAMP（ 8-Bromo 3'： 5'-cyclic adenosine monophosphate）对舌癌细胞株 (Tca8113)细胞间隙连接蛋白基因 Cx43表达的调节作用。方法：应用 MTT法检测 8-Br-cAMP对舌癌细胞株生长的抑制作用；应用免疫细胞化学、流式细胞仪等技术，对 8-Br-cAMP诱导舌癌细胞株细胞间隙连接蛋白基因 Cx43的表达进行分析。结果：舌癌细胞经 10－ 5 mol/L、 10－ 4 mol/L、 10－ 3 mol/L 8-Br-cAMP处理后，细胞生长受抑制，其抑制率随浓度升高而升高；免疫细胞化学检测可见 Cx43蛋白的表达明显提高；流式细胞仪分析 ,Cx43蛋白荧光强度增强，阳性细胞计数率由 4.8％上升至 26.5％，经 t检验两组间存在显著性差异（ P< 0.01）。结论： 8-Br-cAMP对舌癌细胞的抑制作用可能通过上调 Cx43蛋白的表达而实现。
Objectives： This study was designed to investigate the regulation effect of 8-Br-cAMP（ 8-Bromo 3′： 5′-cyclic adenosine monophosphate） on the expression of connexin gene (Cx43) in human tongue carcinoma cell line (Tca8113) . Methods： The inhibitory effect of 8-Br-cAMP on growth of Tca8113 cell line was examined by methyl thiazolyl tetrazolium (MTT) assay. Cx43 gene expression in Tca8113 cells after treated with 8-Br-cAMP was analyzed by immunocytochemistry and flow cytometry . Results： After treated with 8-Br-cAMP(10－ 5 mol/L, 10－ 4 mol/L, 10－ 3 mol/L), Tca8113 cells was inhibited and the inhibition rate was increased with the concentration of 8-Br-cAMP; Immunocytochemistry showed Cx43 protein detectability and up-regulation in 8-Br-cAMP treated cells; The positive rate of Cx43 protein in Tca8113 ce1ls increased from 4.8％ to 26.5％ . There was significant difference between 8-Br-cAMP treated cells and untreated cells（ P< 0.01） . Conclusion： The anti-tumor effect of 8-Br-cAMP on Tca8113 cells might be due to up-regu1ation on Cx43 gene.
出处
《癌症》
SCIE
CAS
CSCD
北大核心
2001年第3期279-281,共3页
Chinese Journal of Cancer
基金
中山医科大学" 211"工程课题基金(编号: 99074)
