雌激素受体在原发性肝癌中的表达与变异

目的:通过研究原发性肝癌组织中野生型雌激素受体(wild type Estrogen receptor,wER)以及第5外显子缺失而变异的雌激素受体(variant estrogen receptor,vER)的表达情况,期望对原发性肝癌进行内分泌治疗的可能性进行分析.方法:收集我院原发性肝癌手术切除的标本28例,应用RT-PCR的方法分析wER与vER在mRNA水平的表达,同时通过免疫组织化学分析对ER在蛋白水平的表达进行检测.结果:免疫组织化学显示原发性肝癌组织中ER的表达率为39.3%(11/28);RT-PCR显示所有标本中均检测到雌激素受体的表达,89.3%(25/28)的原发性肝癌病人表达wER,96.4%(27/28)的肝癌表达vER,其中wER和vER联合表达的病人为85.7%(24/28),仅表达wER的病人为3.5%(1/28),而仅表达vER的为10.7%(3/28).结论:在原发性肝癌的形成过程中,96.4%(27/28)的肝癌出现ER的变异,提示ER的变异与原发性肝癌的形成有密切的关系.

Expression of wild type and variant estrogen receptors in human hepatocellular carcinoma

Objective:To investigate the expression of wild type estrogen receptor(wER)and the ex-on-5 deleted ER(variant ER,vER)in human hepatocellular carcinoma(HCC)samples,and thereafteranalyze the possibility of HCC treatment by endocrine therapy.Methods:The mRNA expressions of wERand vER were analysed from 28 cases of HCC by RT-PCR.The expression of ER at the protein level wasdetected by immunohistochemistry(IHC).Results:IHC results showed that 39.3% of the HCC speci-mens expressed ER.The mRNA of wER was detected in 89.3%(25/28)of the HCC specimens whilethat of vER was detected in 96.4%(27/28).Twenty four out of 28 HCC cases(85.7%)expressedboth wER and vER.One out of 28 patients(3.5%)expressed only wER whereas 3 patients out of 28(10.7%)expressed vER only.Conclusion:Ninety six percent(27/28)of the HCC patients expressedvER,which suggests that the expression of vER is an important event in the development of HCC.