基于基因表达的癌症分子亚型的跨平台比较揭示了与外体捕获方法的差异
Jaewon J Lee1,2, Mohammed Aldakkak3, Ashley B Morrison2
1Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
NPJ precision oncology
|December 20, 2025
概括
使用PurIST对胰腺癌的分子亚型测定显示了取决于平台的结果. 外体捕获RNA-seq可能会影响胰腺管道腺癌 (PDAC) 的亚型准确性和生存分析.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 生物信息学是一种生物信息学.
背景情况:
- 基因表达造型在精密瘤学中至关重要,但在平台有效性方面面临挑战.
- 像PurIST这样的分子亚型算法有助于分类胰腺管道腺癌 (PDAC).
研究的目的:
- 评估PurIST亚型算法在胰腺管道腺癌 (PDAC) 的不同RNA测序平台上的性能.
- 评估外体捕获对整个转录组RNA-seq和NanoString对PurIST亚型化和生存结果的影响.
主要方法:
- 通过全转录组RNA-seq和外基组捕获RNA-seq处理的匹配PDAC样本之间的PurIST分子亚型调用的比较.
- 在NanoString和整个转录组RNA-seq之间的PurIST亚型的并行比较来自PANCREAS试验.
- 使用日志等级测试进行生存分析,以比较基底类和经典亚型之间的结果.
主要成果:
- 整个转录组和外体捕获RNA-seq之间的亚型一致性为81%,外体捕获显示基底类亚型的比例增加.
- 生存分析显示,基底类瘤与外体捕获 (P=0.061) 的非显著差异,但与整个转录组RNA-seq (P<0.0001) 的显著差异.
- 整个转录组RNA-seq和NanoString之间的亚型一致性高达95%.
结论:
- 胰腺管腺癌 (PDAC) 的PurIST亚型化结果在使用外体捕获RNA-seq方法时需要谨慎解释.
- 在RNA处理平台上的差异可以影响PDAC研究中的分子亚型和随后的生存解释.
- 与exome捕获相比,NanoString在PurIST亚型化方面与整个转录组RNA-seq的一致性更高.
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