醋酸棉酚对人舌鳞癌Tca8113细胞生长及人类错配修复基因1甲基化水平的影响  

Effects of gossypol acetic acid on the proliferation and methylation level of the human MutL homologue 1 gene in human tongue carcinoma cell line Tca8113

作　　者：付帅[1] 吴勇[1] 彭庆芳[1] 陈文飞[1] 

机构地区：[1]昆明医科大学附属口腔医院口腔颌面外科,昆明650031

出　　处：《华西口腔医学杂志》2014年第1期91-95,共5页West China Journal of Stomatology

基　　金：云南省科技计划基金资助项目(2009CD207);国家自然科学基金资助项目(81160326)

摘　　要：目的研究醋酸棉酚（GAA）对人舌鳞癌Tca8113细胞增殖的影响和对人类错配修复基因1（hMLHl）甲基化水平的影响，初步探讨其抗肿瘤机理。方法应用MTT法检测GAA对Tca8113细胞生长的影响；应用巢式甲基化特异性聚合酶链反应（nMSP）检测Tca8113细胞在GAA作用48、72h后hMLHl基因甲基化状态的改变情况。结果MTT检测显示，作用24～72h，GAA对Tca8113细胞生长具有抑制作用；nMSP检测显示，以终浓度30、15μmol·L-1的GAA作用于Tca8113细胞48、72h后，hMLH1基因甲基化条带的平均光度值降低，与未经药物处理组比较差异有统计学意义（P〈0．05）。结论GAA能抑制舌鳞癌细胞的生长，并能降低hMLH1基因的甲基化水平。GAA去甲基化作用可能是其具有抗肿瘤作用的机制之一。Objective This paper aims to study the effects of gossypol acetic acid （GAA） on proliferation and methylation level of human MutL homologue 1 （hMLH 1） gene in human tongue cancer cell line Tca8113. Methods The MTT assay was used to determine the effects of the acid on the proliferation inhibition in Tca8113 cells treated with different GAA concen- trations. Nested methylation-specific polymerase chain reaction （nMSP） was used to detect the change in the methylation level ofhMLH1 after 48 and 72 h with 30 and 15 μmol·L-1 GAA treatment. Results MTT assay results showed the growth and proliferation inhibition of Tca8113 cells in the experimental GAA group after 24 h to 72 h of GAA treatment. The nMSP results indicated that the average optical density of hMLH 1 in the Tca8113 cells significantly changed after the GAA treat- ment （30μmol·L-1 GAA for 48 h and 15 ~tmol.L-1 for 72 h） （P〈0.05） compared with that of the control group. Conclusion GAA does not only inhibit Tca8113 proliferation but also has a demethylation effect on the hMLH1 gene. These phenomena may be part of an underlying tumor-suppression mechanism of GAA.

关 键 词：TCA8113细胞 棉酚 抑癌基因 甲基化 

分 类 号：R739.8[医药卫生—肿瘤]