提高m^(6)A去甲基化酶FTO表达抑制鼻咽癌细胞增殖

Increased expression of m^(6)A demethylase FTO inhibits the proliferation of nasopharyngeal carcinoma cells

目的探究N6-甲基腺嘌呤(m^(6)A)去甲基化酶人类脂肪和肥胖相关(FTO)蛋白在鼻咽癌(NPC)中的表达水平,以及过表达FTO对鼻咽癌体内外增殖的影响。方法用免疫组织化学检测鼻咽癌组织及癌旁组织中FTO蛋白的表达;筛选FTO的优势表达细胞株,构建过表达FTO细胞株,用软琼脂增殖实验验证;建立小鼠成瘤模型,测量肿瘤的生长速度。结果发现FTO在鼻咽癌组织中较癌旁组织低表达。FTO低表达促进了鼻咽癌细胞的增殖,而过表达FTO则可逆转这种作用。结论FTO抑制鼻咽癌细胞的增殖过程,可为寻找鼻咽癌的治疗靶点提供实验依据,FTO可能成为未来NPC的治疗靶点。

Objective To investigate the expression of N6 methyladenine(m6A)demethylase human fat mass and obesity-associated(FTO)protein in nasopharyngeal carcinoma(NPC),and the effect of over-expression of FTO on the proliferation of nasopharyngeal carcinoma in vitro and in vivo.Methods Immunohistochemistry method was used to detect the expression of FTO protein in nasopharyngeal carcinoma tissues and para-cancerous tissues;The dominant expression cell line of FTO was screened,the over-expression FTO cell line was constructed.The cell proliferation was examined by soft-agar method.A mouse tumor model was developed for measurement of tumor growth.Results The expression of FTO in nasopharyngeal carcinoma tissues was lower than that in adjacent tissues.Low expression of FTO promoted proliferation of NPC cells,while over-expression of FTO reversed this effect.Conclusions FTO inhibits proliferation of nasopharyngeal carcinoma and this result may provide an experimental technology in searching therapeutic targets of chemotherapy for nasopharyngeal carcinoma.