一个基于SNP的捕获和聚类工作流程,用于评估移植中来自供体的无细胞DNA
Shigeki Mitsunaga1,2, Yohei Yamada1, Phuong Thanh Nguyen3
1Department of Pediatric Surgery, Keio University School of Medicine, Tokyo, Japan.
PloS one
|February 2, 2026
概括
一种新方法使用SNP分析和下一代测序准确估计了来自捐赠者的无细胞DNA (dd-cfDNA). 这种非侵入性技术有助于早期检测器官移植排斥,即使没有移植前受体数据.
科学领域:
- 基因组学和分子生物学
- 移植免疫学 移植免疫学
- 生物标志物发现发现
背景情况:
- 移植器官的非侵入性监测对于早期检测排斥是至关重要的.
- 来自捐赠者的无细胞DNA (dd-cfDNA) 显示出作为器官健康的生物标志物具有前途.
- 准确量化dd-cfDNA对于临床应用至关重要.
研究的目的:
- 开发和验证一个可靠的方法来估计dd-cfDNA比率.
- 评估方法的准确性和可靠性,包括和不包括移植前受体数据.
- 在不同的测序深度和现实世界移植场景下评估该方法的性能.
主要方法:
- 开发了一种dd-cfDNA估计方法,利用300个单核酸多态 (SNP) 的捕获杂交.
- 采用下一代测序 (NGS) 和集群分析来计算dd-cfDNA比率.
- 通过模拟的DNA混合物,in silico降低样本和与脏移植接受者的直接比较来验证该方法.
主要成果:
- 基于集群的方法在0-100%和0-10%范围内实现了高精度 (r2 > 0.997),误差最小 (MAE < 0.8%).
- 该方法保持了准确性,即使减少了测序读取深度,并且没有移植前受体血数据.
- 在移植受体中,在估计和直接计算的dd-cfDNA水平之间观察到高一致性相关系数 (CCC>0.93).
结论:
- 开发的基于集群的dd-cfDNA估计方法是准确的,强大的和可靠的.
- 该方法即使在有限的输入数据或移植前信息无法获得的情况下也表现良好.
- 这种技术在临床器官移植中具有非侵入性监测和早期拒绝检测的巨大潜力.
相关概念视频
DNA Base Pairing
33.2K
Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
33.2K
DNA Base Pairing
32.4K
32.4K
Recombinant DNA
103.0K
Overview
103.0K
DNA-only Transposons
17.5K
DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
The donor site from where the transposon is excised is either degraded or...
17.5K
Base-pairing and DNA Repair
93.4K
93.4K
Base Quantities and Derived Quantities
26.1K
In any system of units, the units for some physical quantities must be specified through a measurement process. These measurements are the base quantities of the system, and their units are the base units of the system. The algebraic combinations of the base values can then be used to express all other physical quantities. Each of these physical quantities is then referred to as a derived quantity, with each unit being referred to as a derived unit.
The International Organization for...
The International Organization for...
26.1K


