Hepatology:外显子组测序发现UBE3C可能是肝癌重要候选基因

2014-01-19 MedSci MedSci原创

来自复旦大学的研究人员采用外显子(exome)组测序技术,揭示出了一个叫做UBE3C的基因在肝细胞癌中具有重要的临床意义。相关研究论文已被在国际著名肝脏疾病杂志Hepatology(最新影响因子12.003)接受并在线发布。 复旦大学附属中山医院的周俭(Jian Zhou)教授和黄晓武(Xiao-Wu Huang)博士是这篇论文的共同通讯作者。前者主要擅长各种肝肿瘤疑难杂症的诊断、治疗与肝脏移植

来自复旦大学的研究人员采用外显子(exome)组测序技术,揭示出了一个叫做UBE3C的基因在肝细胞癌中具有重要的临床意义。相关研究论文已被在国际著名肝脏疾病杂志Hepatology(最新影响因子12.003)接受并在线发布。

复旦大学附属中山医院的周俭(Jian Zhou)教授和黄晓武(Xiao-Wu Huang)博士是这篇论文的共同通讯作者。前者主要擅长各种肝肿瘤疑难杂症的诊断、治疗与肝脏移植。后者则擅长原发性肝癌、转移性肝癌以及肝血管瘤、结节性增生、肝囊肿等肝脏良恶性肿瘤的外科切除,及肝脏移植。

原发性肝癌是人类常见的恶性肿瘤之一,全世界每年新增50万~100 万病例。5年死亡率超过90%。我国是肝癌的高发地区 近年发病率呈缓慢上升趋势,病死率也随之上升,占癌症死亡率的第三位。研究确认, 原发性肝癌与乙型肝炎病毒及丙型肝炎病毒感染密切相关。肝细胞癌是原发性肝癌的一种主要类型,也是恶性程度最高的肿瘤之一。50%-80%以上的肝细胞癌因持续的乙型肝炎病毒感染所致,大约25%由于持续的丙型肝炎病毒感染。

病毒诱导肝癌形成涉及一连串的组织学演化过程,逐步获得一些遗传改变是肝细胞发生恶性转变的必要条件。尽管近年来的研究已经确定了一些与肝细胞癌发病机制相关的遗传改变,对于促成这一过程的特异基因仍知之甚少。

为了深入地了解从乙肝病毒感 染到癌前病变的不典型增生结节(dysplastic nodule,DN)、至肝癌形成这一肿瘤进化过程中相关的遗传改变,研究人员首先对4个DNA样本进行了外显子组测序:其中包括1个不典型增生结节样 本,两个肝癌样本,和来自一名肝癌患者的对照外周血样本。研究人员在两个肿瘤样本中观察到UBE3C基因发生了突变。

随后,他们对另外105名肝癌患者中对UBE3C基因进行了重测序验证,确定其中有17人(16.0%)存在UBE3C基因突变。利用一些实验,他们证实UBE3C通过调控肝癌细胞的上皮间质转化促进了肝癌的进程。针对323名临床肝癌患者进行组织微阵列研究的结果表明,原发性肝癌组织中UBE3C 过表达与肝癌患者手术后生存率降低以及早期肿瘤复发密切相关。

这些研究结果表明,UBE3C有可能是与肝癌形成和进展相关一个重要的候选癌基因,由此为肝癌治疗提供了一个新的潜在治疗靶点。

另外,据韩国研究表明这个基因与哮喘有密切关系。

原始出处:

Jiang JH, Liu YF, Ke AW, Gu FM, Yu Y, Dai Z, Gao Q, Shi GM, Liao BY, Xie YH, Fan J, Huang XW, Zhou J.Clinical significance of the ubiquitin ligase E3C in hepatocellular carcinoma revealed by exome sequencing.Hepatology. 2014 Jan 15. doi: 10.1002/hep.27012.

相关文献:

Pasaje CF, Kim JH, Park BL, Park JS, Uh ST, Kim MK, Park CS, Shin HD.UBE3C genetic variations as potent markers of nasal polyps in Korean asthma patients.J Hum Genet. 2011 Nov;56(11):797-800.

Lee JS, Kim JH, Bae JS, Kim JY, Park TJ, Pasaje CF, Park BL, Cheong HS, Park JS, Uh ST, Kim MK, Choi IS, Cho SH, Choi BW, Park CS, Shin HD.Association analysis of UBE3C polymorphisms in Korean aspirin-intolerant asthmatic patients.Ann Allergy Asthma Immunol. 2010 Oct;105(4):307-312.

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    2014-01-21 gwc384
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