评估全基因组测序在识别癌症基因组驱动因素改变中的实用性
Takeshi Nagashima1,2, Ken Yamaguchi3, Kenichi Urakami1
1Cancer Diagnostics Research Division, Shizuoka Cancer Center Research Institute, Shizuoka, Japan.
Scientific reports
|October 12, 2024
概括
全基因组测序 (WGS) 有效地识别了癌症驱动因子的变化,而全外基因组测序 (WES) 错过了这些变化. 在此之前未被诊断的90%以上的癌症病例中,WGS揭示了显著的基因组变化,改善了癌症基因组分析.
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:
- 识别致病性遗传变异对于理解癌症的发展至关重要.
- 整体外基因组测序 (WES) 有局限性,在很大一部分癌症病例 (27.8%) 中无法检测出驱动因子的改变.
研究的目的:
- 评估全基因组测序 (WGS) 在检测癌症驱动因素变化的有效性.
- 为了比较WGS与WES的诊断实用性,用于识别瘤性基因组变化.
主要方法:
- 全基因组测序 (WGS) 对177名日本癌症患者的样本进行了测序,这些样本之前已被WES分析,但没有发现驱动因素的改变.
- 根据原发瘤的起源,WES和转录组数据的存在以及瘤含量 (≥30%) 选择了样本.
主要成果:
- 全基因组测序 (WGS) 在68.4%和22.6%的病例中分别发现了驱动因素或可能的驱动因素变化.
- 通过WGS检测到的最常见的变化是瘤基因放大,其次是瘤抑制基因删除和非编码小变异.
- 大约9.0%的样本没有发现驾驶员改变,需要进一步调查.
结论:
- 与WES相比,全基因组测序 (WGS) 显著提高了对导致癌症的基因组改变的检测.
- WGS是全面癌症基因组分析的宝贵工具,揭示了以前未被检测到的瘤发生事件.
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