p73基因在卵巢上皮性肿瘤中的表达及甲基化研究  被引量:2

Expression and promotor methylation of p73 gene in ovarian epithelial tumors

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作  者:张银丽[1] 郭小荣[3] 沈丹华[1] 成夜霞[2] 梁旭东[2] 陈云新[1] 王颖[1] 

机构地区:[1]北京大学人民医院病理科,100044 [2]北京大学人民医院妇产科,100044 [3]哈尔滨医科大学第二医院病理科

出  处:《中华病理学杂志》2012年第1期33-38,共6页Chinese Journal of Pathology

基  金:国家自然科学基金(30672224)

摘  要:目的探讨卵巢上皮性肿瘤中p73蛋白的表达和基因启动子的甲基化情况,并观察其与临床病理学特征的关系。方法制备包括68例卵巢癌、37例卵巢交界性肿瘤和21例卵巢良性肿瘤的组织芯片,用免疫组织化学EnVision法检测上述组织中p73蛋白表达情况,用亚硫酸氢盐修饰后测序法检测13例新鲜卵巢癌组织及5例新鲜卵巢交界性肿瘤组织的p73基因启动子甲基化情况。结果92.6%(63/68)的卵巢癌表达p73,p73蛋白总体表达率均值为32%(p73表达率指p73阳性细胞数所占的百分比),其中浆液性癌(26/26)的表达率均值为40%,高于其他组织类型的癌(P=0.006)。按照卵巢癌发病模式区分,Ⅱ型卵巢癌p73表达率均值(40%)高于Ⅰ型卵巢癌(24%),P=0.010。卵巢癌中p73的表达与临床分期及组织学分级无相关性(均P〉0.05)。卵巢交界性肿瘤组(30/37)和良性肿瘤组(12/21)p73的总体表达率均值分别为16%和15%,该两组肿瘤中浆液性肿瘤表达率均值均高于黏液性肿瘤(P=0.003,P=0.026)。卵巢癌组的p73阳性表达率均值明显高于交界性肿瘤组和良性肿瘤组(均P〈0.05),交界性肿瘤组与良性肿瘤组比较差异无统计学意义(P〉0.05)。浆液性肿瘤(49/53)中,卵巢癌组(26/26)p73阳性表达率均值明显高于交界性肿瘤组(12/14)和良性肿瘤组(11/13;P=0.024和P=0.002),而卵巢交界性肿瘤组和良性肿瘤组比较差异无统计学意义(P=0.428)。黏液性肿瘤(15/27)中,卵巢癌组(6/7)p73阳性表达率均值高于良性肿瘤组(1/8;P=0.032),而卵巢癌组与卵巢交界性肿瘤组(8/12)、交界性肿瘤组与良性肿瘤组比较,差异均无统计学意义(P=0.234和P=0.201)。p73启动子的甲基化结果显示,13例卵巢癌有8例发生甲基化,但每例样本甲基化频率有所不同�Objective To investigate the expression and promoter methylation status of p73 gene in ovarian epithelial tumors and their clinicopathological correlations. Methods Tissue microarrays (TMA) consisting of 68 ovarian cancers, 37 ovarian borderline tumors and 21 ovarian benign tumors were constructed, p73 expression was detected by immunohistochemistry (EnVision method). Fresh-frozen tissue samples from 13 cases of ovarian carcinomas and 5 cases of borderline tumors were evaluated for the presence of p73 promoter methylation using bisulfite sequencing. Results Overall, 92.6% ( 63/68 ) ovarian carcinomas expressed p73 ,with a mean value of 32% (percentage of p73 positive cells in the tumor). The mean value of p73 expression rate ( 40% ) in serous carcinoma ( 26/26 ) was higher than those of other cancer types (P =0. 006). The mean value of p73 expression rate (40%) in type II ovarian carcinoma was significantly higher than that in type I ovarian carcinoma (24% , P = 0. 010 ). The expression of p73 was not associated with FIGO stage and histological grade ( both P 〉 0. 05 ). The mean values of p73 expression in ovarian borderline tumor (30/37) and benign tumor (12/21) were 16% and 15% , respectively. Of the two groups, the mean value of p73 expression rate in serous type was higher than that in mucous type (P = 0. 003, P = 0. 026). Ovarian carcinomas had a higher level of p73 expression than borderline tumors and benign tumors ( both P 〈 0. 05 ) , while that between ovarian borderline tumors and benign tumors had no statistical difference (P 〉0. 05). Among serous tumors (49/53) , the mean value of p73 expression in the carcinoma group (26/26) was significantly higher than those in the borderline tumor group (12/14) and benign tumor group ( 11/13 ; P = 0. 024 and P = 0. 002, respectively) , while that between borderline tumor group and benign tumor group had no statistical difference (P = 0. 428 ). Among mucous tumors (15/27), the

关 键 词:卵巢肿瘤 肿瘤抑制蛋白质P53 寡核苷酸序列分析 免疫组织化学 甲基化 

分 类 号:R737.31[医药卫生—肿瘤]

 

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