Nature Genetics:数种肾癌变异基因被发现

2013-06-26 佚名 新华社

  日本研究人员最新报告说,他们已经发现并彻底研究了与肾癌有关的数种基因变异,这有助于开发治疗肾癌的新药和疗法。  京都大学和东京大学等机构的研究人员25日在《自然·遗传学》期刊网络版上报告说,他们对100多名透明细胞性肾癌患者进行研究,发现一种名为VHL的基因出现变异的频率非常高,被认为是导致肾癌的主要原因之一。  研究人员还通过对比研究患者的癌细胞染色体组发现,92%的患者VHL基因出现变异。

  日本研究人员最新报告说,他们已经发现并彻底研究了与肾癌有关的数种基因变异,这有助于开发治疗肾癌的新药和疗法。

  京都大学和东京大学等机构的研究人员25日在《自然·遗传学》期刊网络版上报告说,他们对100多名透明细胞性肾癌患者进行研究,发现一种名为VHL的基因出现变异的频率非常高,被认为是导致肾癌的主要原因之一。

  研究人员还通过对比研究患者的癌细胞染色体组发现,92%的患者VHL基因出现变异。在该基因没有变异的患者中,约40%患者的TCEB1基因出现了变异。研究小组还发现,BAP1基因变异会提高肾癌患者的死亡风险,SETD2基因变异则会提高肾癌细胞转移风险。

  在肾癌病例中,透明细胞性肾癌占80%左右。在发病早期阶段,肾癌患者的5年生存率达到70%至90%。如果病情恶化导致癌细胞转移,则缺乏有效的治疗方法。

Integrated molecular analysis of clear-cell renal cell carcinoma
Abstract
Clear-cell renal cell carcinoma (ccRCC) is the most prevalent kidney cancer and its molecular pathogenesis is incompletely understood. Here we report an integrated molecular study of ccRCC in which ≥100 ccRCC cases were fully analyzed by whole-genome and/or whole-exome and RNA sequencing as well as by array-based gene expression, copy number and/or methylation analyses. We identified a full spectrum of genetic lesions and analyzed gene expression and DNA methylation signatures and determined their impact on tumor behavior. Defective VHL-mediated proteolysis was a common feature of ccRCC, which was caused not only by VHL inactivation but also by new hotspot TCEB1 mutations, which abolished Elongin C–VHL binding, leading to HIF accumulation. Other newly identified pathways and components recurrently mutated in ccRCC included PI3K-AKT-mTOR signaling, the KEAP1-NRF2-CUL3 apparatus, DNA methylation, p53-related pathways and mRNA processing. This integrated molecular analysis unmasked new correlations between DNA methylation, gene mutation and/or gene expression and copy number profiles, enabling the stratification of clinical risks for patients with ccRCC.

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    2013-12-06 huperzia
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    2014-02-01 canlab
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    2013-07-01 liye789132251
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    2013-06-28 axin014

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