人Runt相关转录因子3、zeste基因增强子同源物2蛋白表达与局部进展期直肠癌新辅助化疗敏感性的关系  

Relationship between Expression of Runt-related Transcription Factor 3 and Enhancer of zeste Homolog 2 Proteins and Sensitivity to Neoadjuvant Chemotherapy in Locally Advanced Rectal Cancer

作　　者：袁泽龙 武雪亮[2] 屈明[2] 薛军[2] 韩磊[2] 孙光源 YUAN Zelong;WU Xueliang;QU Ming;XUE Jun;HAN Lei;SUN Guangyuan(Department of Interventional Surgery,the First Affiliated Hospital of Hebei North University,Zhangjiakou,Hebei 075000,China;Department of General Surgery,the First Affiliated Hospital of Hebei North University,Zhangjiakou,Hebei 075000,China)

机构地区：[1]河北北方学院附属第一医院介入科,河北张家口075000 [2]河北北方学院附属第一医院普通外科,河北张家口075000

出　　处：《中国医学科学院学报》2021年第6期856-864,共9页Acta Academiae Medicinae Sinicae

摘　　要：目的探究人Runt相关转录因子3(RUNX3)和zeste基因增强子同源物2(EZH2)在直肠癌中的表达情况和相关性,探究RUNX3和EZH2蛋白表达与局部进展期直肠癌患者XELOX方案新辅助化疗敏感性的关系。方法31例术前未经抗肿瘤治疗的直肠腺癌患者的癌组织和癌旁组织作为癌组和癌旁组,实时荧光定量逆转录-聚合酶链式反应检测两组中RUNX3和EZH2 mRNA相对表达量,同时采用免疫组织化学法检测两组中RUNX3和EZH2的蛋白表达情况,分析RUNX3和EZH2在癌组织和癌旁组织中的表达差异;将26例术前行3周期XELOX方案新辅助化疗的局部进展期直肠癌患者的治疗前活检蜡块作为治疗前组,其术后病理蜡块作为治疗后组,病理肿瘤缩退学分级评估患者新辅助化疗疗效,采用免疫组织化学法检测两组中RUNX3和EZH2的蛋白表达情况,分析两基因蛋白表达模式与新辅助化疗疗效的关系。结果与癌旁组相比,癌组RUNX3 mRNA的表达下调,蛋白的阳性表达率降低(P=0.001),EZH2 mRNA的表达上调,蛋白的阳性表达率升高(P=0.022);癌组中RUNX3和EZH2的mRNA表达呈负相关(r=-0.599,P=0.000);12例接受新辅助化疗的患者达到TRG0~TRG2级,新辅助化疗总体有效率为46.15%(12/26);与治疗前组相比,治疗后组RUNX3蛋白阳性表达率有上升趋势,但差异无统计学意义(P=0.163),EZH2蛋白阳性表达率有下降趋势,但差异无统计学意义(P=0.095);治疗前组RUNX3阳性表达的患者新辅助化疗有效率为75.00%(9/12),EZH2阴性表达的患者新辅助化疗有效率为77.78%(7/9),RUNX3+/EZH2-的患者新辅助化疗有效率为100%(7/7),高于其他蛋白表达模式(P=0.019),多因素Logistic回归显示RUNX3蛋白的表达情况是患者新辅助化疗疗效的影响因素。结论RUNX3在直肠癌组织中阳性表达率低于癌旁组织,EZH2在直肠癌组织中阳性表达率高于癌旁组织,二者在直肠癌中的表达呈负相关;XELOX方案新辅助化疗可能会对直肠癌中RUNX3Objective To investigate the expression and correlation of Runt-related transcription factor 3(RUNX3)and enhancer of zeste homolog 2(EZH2)in rectal cancer,and to reveal the relationship between the expression of RUNX3 and EZH2 and the sensitivity of XELOX regimen to neoadjuvant chemotherapy in locally advanced rectal cancer patients.Methods The carcinoma and paracancerous tissues of 31 patients with rectal adenocarcinoma and no preoperative antitumor therapy were selected as cancer group and paracancer group,respectively.The relative mRNA levels of RUNX3 and EZH2 in the two groups were measured by real-time quantitative reverse transcription-polymerase chain reaction,and the protein levels were determined by immunohistochemical assay.The expression of RUNX3 and EZH2 was compared between cancer tissue and paracancerous tissue.The pre-treatment wax blocks of 26 patients with locally advanced rectal cancer who received 3 cycles of XELOX regimen as neoadjuvant chemotherapy before surgery were selected as the pre-neoadjuvant therapy group,and the postoperative pathological wax blocks were selected as the post-neoadjuvant treatment group.Tumor regression grade(TRG)was determined to evaluate the efficacy of neoadjuvant therapy.Immunohistochemical assay was used to detect the protein levels of RUNX3 and EZH2 in the two groups,and then the relationship between the expression patterns of the two proteins and the efficacy of neoadjuvant chemotherapy was analyzed.Results Compared with paracancerous tissue,the cancer tissue showed down-regulated mRNA level and reduced positive protein expression rate of RUNX3,while up-regulated mRNA level(P=0.001)and increased positive protein expression rate of EZH2(P=0.022).The mRNA levels of RUNX3 and EZH2 in the cancer group were negatively correlated(r=-0.599,P=0.000).Twelve patients who received neoadjuvant chemotherapy reached TRG0-TRG2,and the overall effective rate of neoadjuvant chemotherapy was 46.15%(12/26).Compared with pre-neoadjuvant therapy group,the post-neoadjuvant therapy g

关 键 词：进展期直肠癌 RUNT相关转录因子3 zeste基因增强子同源物2 XELOX 新辅助化疗 肿瘤缩退学分级 

分 类 号：R735.1[医药卫生—肿瘤]