这种突变谱是由来自肺癌患者的配对基因组序列揭示的
William Lee1, Zhaoshi Jiang, Jinfeng Liu
1Department of Bioinformatics and Computational Biology, Genentech Inc., South San Francisco, California 94080, USA.
Nature
|May 28, 2010
概括
这项研究对一次性肺瘤进行了测序,揭示了超过5万个体质突变,包括编码区域的新奇变异和结构变化. 它强调了在瘤环境中对基因起作用的独特选择压力.
科学领域:
- 基因组学就是基因组学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 肺癌是全球癌症死亡的主要原因,特别是吸烟者的非小细胞肺癌.
- 之前对肺癌突变的研究受限于专注于有限的基因组,从而对突变格局提供了狭窄的观点.
- 下一代测序的进步使得在各种癌症中进行全基因组突变分析成为可能.
研究的目的:
- 提供对原发性肺瘤体质变化的综合性全基因组分析.
- 识别和描述体质变异的频谱,包括单核酸变异和结构变异.
- 研究对瘤基因组内的突变起作用的选择性压力.
主要方法:
- 在高覆盖率 (60x和46x,分别) 的初级肺瘤和相邻正常组织的全基因组测序.
- 生物信息分析用于识别高可信度单核酸变异 (SNV) 和大规模结构变异.
- 使用已确定的方法验证一个体质SNV子集的有效性.
主要成果:
- 识别了超过5万个高度可靠的SNV和43个大规模的结构变化.
- 估计全基因组体质突变率为每兆基17.7.
- 观察到表达基因和促进子区域的突变对显著选择,在激酶基因中氨基酸变异突变的比率更高.
结论:
- 这项研究提供了对单个肺瘤体质变化的全面观点.
- 提供了在肺瘤环境中运行的明显选择性压力的第一个证据.
- 提供了对肺癌的基因组景观的更深入的了解,这对于开发向疗法至关重要.
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