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多复合数字PCR参考基因测量用于基因组和无细胞DNA分析

Dilek Yener^1,2, Eloise J Busby¹, Jo Vandesompele³

¹National Measurement Laboratory, LGC, Guildford GU2 7XY, UK.

|October 15, 2025

概括

使用五重复基因参考面板的新数字PCR (dPCR) 方法为总DNA量化提供了强大的解决方案. 这种方法通过为基因组DNA和无细胞DNA提供更低的测量不确定性来提高精准医学的准确性.

科学领域:

生物化学生物化学
基因组学就是基因组学.
分子生物学分子生物学

背景情况:

精确的DNA量化对于精准医学和体质变体检测至关重要.
现有的总DNA量化方法缺乏标准化的黄金标准.
基因组DNA (gDNA) 和无细胞DNA (cfDNA) 是基因组工作流程的关键输入.

研究的目的:

开发和验证使用数字PCR (dPCR) 作为总DNA量化的候选黄金标准的五重复基因基因基因组.
将多重dPCR方法的性能与使用gDNA和cfDNA的两个测试化学进行比较.
评估该方法是否适用于癌症样本的复制数变异 (CNV) 量化.

主要方法:

开发用于dPCR的五重复基因参考组.
该小组应用于健康的捐赠者gDNA和血cfDNA.
测量癌细胞系DNA中的ERBB2 (HER2) 拷贝数变化.
用于多重分析的两个dPCR测定化学的比较.

主要成果:

多重dPCR方法表现出强大的性能和可比的结果在两个测试化学与广泛的动态范围.
在健康样本中,基因基因比率接近1:1,其中一个目标基因有轻微的变异 (<1.2倍).
扩展的相对测量不确定性范围为12.1-19.8%的健康gDNA和9.2-25.2%的cfDNA.
多重测量方法的测量不确定性低于用于总DNA量化的单一参考方法.

结论:

开发的五合体dPCR面板作为总DNA量化可靠的候选参考方法.
多重方法提供了更好的准确性和更低的测量不确定性,有利于基因组工作流程的校准.
这种方法减轻了癌症样本CNV量化中的潜在偏差,解决了基因组不稳定性的挑战.

关键词:

在 dPCR 中使用 dPCR.基因组等价的基因组等价物液体活检活检液体活检精准医学是一门精准医学.基因稳定性的参考基因稳定性

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