斑溢出超:在肺癌分子测试中,为无细胞DNA提供可靠的资源
Shilpi Thakur1, Amber Rathor1, Surabhi Jain1
1Department of Pathology, All India Institute of Medical Sciences, New Delhi, India.
Journal of the American Society of Cytopathology
|May 4, 2024
概括
来自多流的无细胞DNA (cfDNA) 是肺癌分子测试的可靠来源. 这种方法补充了传统的瘤DNA来源,用于全面的突变分析.
科学领域:
- 在瘤学瘤学.
- 分子诊断学 分子诊断
- 遗传学 是一个遗传学.
背景情况:
- 传统的分子检测依赖于来自恶性多叶膜溢出 (PE) 沉积物的瘤DNA.
- 新兴研究表明,PE离心超水生物 (CCS) 的无细胞DNA (cfDNA) 可能是一个可行的替代方案.
- 这项研究调查了PE CCS中cfDNA对肺癌分子测试的有用性.
研究的目的:
- 评估使用从PE CCS提取的cfDNA进行分子测试的可行性和实用性.
- 来自CCS的cfDNA与传统瘤DNA来源进行突变检测的比较.
主要方法:
- 未来的PE CCS样品的收集和储存.
- 从PE CCS中提取cfDNA,然后使用实时PCR (qPCR) 进行EGFR突变测试.
- 针对性下一代测序 (NGS) 在样本子集上进行.
主要成果:
- 在PE CCS cfDNA和匹配的瘤DNA (沉积物,活检,血) 之间观察到EGFR突变的91%一致性.
- 在一个案例中,CCS cfDNA检测到额外的T790M突变.
- 在10个CCS样本中,NGS在2个中发现了额外的EGFR突变,这些突变在qPCR中错过了.
结论:
- 来自PE CCS的cfDNA是用于分子测试的瘤DNA的可靠和独立来源.
- 这种方法有效地补充了其他瘤DNA来源,用于肺腺癌 (LUAD) 的综合突变概况.
- 在CCScfDNA中突变检测的成功独立于cfDNA数量或瘤分数.
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