通过针头竞争放大低频变体的高灵敏度丰富
Zhaocheng Liu1,2, Rui Zhang1,2, Xixi Jiang1
1Department of Laboratory Medicine, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi 214023, China.
Analytical chemistry
|August 1, 2023
概括
一种新的针头竞争放大 (HCA) 系统有效地丰富了无细胞瘤DNA (ctDNA) 中的罕见突变. 这种方法实现了早期癌症检测和精确治疗的高灵敏度,克服了低变异异基因分数 (VAF) 的挑战.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生物技术是生物技术.
背景情况:
- 基因突变在人体细胞中积累,需要在疾病过程中早期检测.
- 鉴定低拷贝瘤DNA (ctDNA) 的基因型是具有挑战性的,因为大量的野生型DNA背景.
- 在低变异基因分数 (VAF) 上检测罕见突变需要敏感的方法.
研究的目的:
- 引入和研究一种用于丰富罕见突变的新型毛针竞争放大 (HCA) 系统.
- 分析人造头发针对高温PCR中原料结合的影响,以优化HCA.
- 评估HCA在临床样本中敏感检测低丰度变异的疗效.
主要方法:
- 发针竞争放大 (HCA) 系统的开发,使用人工发针与原料竞争.
- 在高温PCR系统中研究头对原料结合的影响.
- 应用HCA与定量PCR (qPCR) 和桑格测序用于在低VAF (0.1%和0.01%) 上丰富突变DNA.
主要成果:
- 在VAF中,HCA成功丰富了突变DNA,仅为0.1%或0.01%.
- 在多重反应和温度稳定性方面,HCA表现出优势.
- 在分析肺癌和甲状腺癌ctDNA样本中,HCA与ddPCR和商业ARMS套件实现了100%的一致性.
结论:
- 酸是一种新且有效的工具,用于丰富具有高灵敏度和温度强度的低丰度变体.
- HCA为精确诊断和治疗罕见变异性疾病提供了有前途的方法.
- 这项研究提供了对优化HCA的见解,通过研究头针对原料结合的影响来优化HCA.
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