三结构域蛋白26在胶质瘤组织中的表达及临床意义

Expression and clinical significance of tripartite motif protein 26 in glioma tissues

目的探讨三结构域蛋白26(TRIM26)在人脑胶质瘤组织中的表达,分析TRIM26的表达水平与患者临床病理特征之间的关系,并研究TRIM26过表达对人脑胶质瘤细胞系U87和U251增殖的影响。方法收集32例患者的胶质瘤组织及8例脑外伤患者内减压术中切除的脑组织(正常脑组织),采用实时定量PCR及免疫组化检测TRIM26mRNA及蛋白在胶质瘤组织和正常脑组织中的表达水平,并分析胶质瘤组织中TRIM26 mRNA表达水平与患者临床病理特征之间的相关性,Kaplan-Meier生存分析TRIM26mRNA表达水平与胶质瘤患者总生存时间、无复发生存时间之间的关系。MTT法检测TRIM26过表达对人脑胶质瘤细胞系U87及U251增殖的影响。结果免疫组化结果显示,TRIM26在胶质瘤组织中的表达量高于正常脑组织;实时定量PCR结果显示,TRIM26 mRNA在胶质瘤组织中表达量(3.51±0.92)高于正常脑组织(1.99±0.45)(P<0.01),Ⅲ-Ⅳ级胶质瘤中TRIM26的表达量(3.75±0.84)高于Ⅰ-Ⅱ级(2.65±0.62)(P<0.01)。胶质瘤组织中TRIM26的表达水平与患者胶质瘤病理级别显著相关(P=0.01),而与患者性别(P=0.72)、年龄(P=0.72)及异柠檬酸脱氢酶1(IDH1)突变(P>0.999)无显著相关。高表达TRIM26的胶质瘤患者总生存时间[(16.29±1.82)vs(28.73±1.41)个月,P<0.01]及无复发生存时间[(8.34±1.78)vs(15.95±1.83)个月,P<0.01]低于低表达组。过表达TRIM26促进胶质瘤细胞U87及U251的增殖。结论 TRIM26在胶质瘤组织中呈高表达,并与患者病理级别和预后相关。

Objective To detect the expression of tripartite motif protein 26(TRIM 26)in glioma tissues,to analyze the relationship of its expression and multiple pathological parameters,and to explore the effect on its overexpression in U87and U251 for the proliferation of glioma cells.MethodsA total of 32 cases of glioma tissues and 8 cases of normal brain tissues w ere collected.Real-time quantitative PCR and immunohistochemistry w ere used to detect the expression of TRIM 26 in levels of mRNA and protein.The relationship betw een TRIM 26 mRNA expression and clinical pathological parameters w as analyzed.Effect on TRIM 26 overexpression in U87 and U251 for proliferation of glioma cells w as detected by M TT assay.Results Immunochemistry results show ed that the percentage of TRIM 26 positive cells w as higher in glioma tissues than control tissues.Compared w ith the control group,the expression of TRIM 26 in glioma tissues w as significantly increased[3.51±0.92 vs 1.99±0.45,P<0.01].The expression of TRIM 26 in patients ofⅢ-Ⅳgrade w as markedly higher than in patients ofⅠ-Ⅱgrade[3.75±0.84 vs 2.65±0.62,P<0.01].TRIM 26 expression w as observably associated w ith stage(P=0.01),but not gender(P=0.72),age(P=0.72),and IDH1 mutation(P>0.999).M oreover,Kaplan-M eier analysis demonstrated that increasing of TRIM 26 expression contributed to shorter overall survival[(16.29±1.82)vs(28.73±1.41)months,P<0.01]and recurrence-free survival time[(8.33±1.78)vs(15.95±1.83)months,P<0.01].Overexpression of TRIM 26 in U87 and U251 cell lines promoted the proliferation of glioma cells.Conclusion TRIM 26 is highly expressed in glioma,and the overexpression of TRIM 26 is associated w ith pathological grade and prognosis.