Nature:食管鳞状细胞癌基因研究新成果

2014-03-19 佚名 生物通

来自中国医学科学院、深圳华大基因研究院等机构的研究人员,采用全基因组测序、全外显子组测序和比较基因组杂交芯片分析等方法,对来自广东省潮汕地区的158名食管鳞状细胞癌(ESCC)患者展开研究,鉴别出了这类癌症的一些基因组改变。这一重要的研究成果发表在3月16日的《自然》(Nature)杂志上。 领导这一研究的是中国医学科学院副院长詹启敏(Qimin Zhan),其多年来主要从事肿瘤分子生物学研究,

来自中国医学科学院、深圳华大基因研究院等机构的研究人员,采用全基因组测序、全外显子组测序和比较基因组杂交芯片分析等方法,对来自广东省潮汕地区的158名食管鳞状细胞癌(ESCC)患者展开研究,鉴别出了这类癌症的一些基因组改变。这一重要的研究成果发表在3月16日的《自然》(Nature)杂志上。【原文下载】

领导这一研究的是中国医学科学院副院长詹启敏(Qimin Zhan),其多年来主要从事肿瘤分子生物学研究,曾在国际上率先发现和系统揭示细胞周期监测点关键蛋白的作用和机制,报道抑癌基因p53的最重要生物学功能,并发现第一个p53调控靶基因。在Cell、Science、Nat Genet等权威期刊发表140多篇,SCI他引超过11000次。2011年当选中国工程院院士。


Histone-modifying genes recurrently mutated in 88 ESCCs

食管癌是最具侵袭性的癌症类型之一,是全球第六位的主要癌症死亡原因。近70%的全球食管癌病例发生在中国,绝大多数病例(>90%)的组织病理形式是食管鳞状细胞癌(ESCC)。目前,ESCC的早期临床诊断及治疗方法有限,患者的5年生存率仅为10%。直到现在对于导致ESCC发病的完整基因组事件仍知之甚少。

在这项新研究中,研究人员对国际癌症基因组协会研究计划中的158个ESS病例进行了全面的基因组分析。他们对17个ESS病例进行了全基因组测序,对71个ESS病例进行了全外显子组测序,对其中53个接受测序的病例以及70个未接受全基因组和全外显子组测序的病例进行了比较基因组芯片杂交分析。由此,他们确定了8个与ESCC显著相关的突变基因,其中6个是众所周知的肿瘤相关基因:P53、 RB1、CDKN2A、 PIK3CA、 NOTCH1以及 NFE2L2,有两个基因ADAM29和FAM135B首次描述与ESCC相关。

值得注意的是,FAM135B被确定为是一个新型的癌症相关基因,分析结果显示它能够促进ESCC细胞的恶性。一个编码在扩增11q13.3-13.4区域的microRNA:MIR548K被研究人员视为是一个新型的癌基因,功能分析结果证实MIR548K促进了ESCC细胞的恶性表型。

此外,研究人员还发现了几个重要的组蛋白调控基因MLL2(又称作KMT2D)、ASH1L、MLL3 (KMT2C) 、SETD1B、CREBBP 和EP300在ESCC中频繁发生改变。信号通路分析结果揭示一些体细胞变异主要与Wnt、细胞周期以及Notch信号通路相关。基因组分析结果则表明,ESCC和头颈部鳞状细胞癌共享某些共同的致病机制,且ESCC形成与饮酒有关联。 这项研究为了我们提供了一些新型的生物标记物及致癌信号通路,对于大大地改进ESCC的诊断及治疗策略具有重要的指导意义。

原始出处:

Yongmei Song,Lin Li, Yunwei Ou, Zhibo Gao, Enmin Li, Xiangchun Li,Weimin Zhang, Jiaqian Wang, Liyan Xu,Yong Zhou, Xiaojuan Ma, Lingyan Liu,Zitong Zhao,Xuanlin Huang, Jing Fan, Lijia Dong,Gang Chen, Liying Ma,Jie Yang,Longyun Chen,Minghui He, Miao Li, Xuehan Zhuang, Kai Huang, Kunlong Qiu , Guangliang Yin, Guangwu Guo, Qiang Feng, Peishan Chen, Zhiyong Wu,Jianyi Wu, Ling Ma,Jinyang Zhao,Longhai Luo, Ming Fu, Bainan Xu, Bo Chen, Yingrui Li,Tong Tong,Mingrong Wang,Zhihua Liu, Dongxin Lin, Xiuqing Zhang, Huanming Yang, Jun Wang & Qimin Zhan.Identification of genomic alterations in oesophageal squamous cell cancer.Nature Mar 16 March 2014 doi:10.1038/nature13176 【原文下载】

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    2014-06-26 liye789132251
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    2014-03-21 zhouqu_8
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    2014-07-09 wgx306

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