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合成不匹配使得基于CRISPR-Cas12a的特定基因组SNV被ARTEMIS跟踪的检测成为可能

Kavish A V Kohabir¹, Jasper Linthorst², Lars O Nooi³

¹Department of Human Genetics, Amsterdam UMC location Vrije Universiteit Amsterdam, Amsterdam, the Netherlands; Amsterdam Reproduction & Development, Amsterdam, the Netherlands; Imaging and Biomarkers, Cancer Center Amsterdam, Amsterdam, the Netherlands.

Cell reports methods

|December 7, 2024

概括

这项研究介绍了ARTEMIS,这是一种用于发现CRISPR诊断癌症突变的计算工具. 它提高了Cas12a的准确性,用于在癌症患者中检测单核酸变异.

科学领域:

基因组学就是基因组学.
分子诊断学分子诊断
生物信息学是一种生物信息学.

背景情况:

基于CRISPR的诊断 (CRISPRdx) 显示出快速,经济高效的癌症检测的希望.
使用CRISPRdx实现致病性DNA变异的单核酸分辨率仍然是一个挑战.

研究的目的:

开发一个计算管道 (ARTEMIS) 以识别CRISPRRNA种子区域中Cas12a可识别的致病突变.
提高Cas12a的特异性和忠实性,用于检测与癌症相关的单核酸变体 (SNV).

主要方法:

开发了一个in silico管道 (ARTEMIS) 来扫描人类基因组,在crRNA种子区域内寻找Cas12a可向的致病突变.
评估了Cas12a对种子区域单个不匹配的耐受性.
在种子区域引入了合成不匹配,以提高目标检测准确度.
使用来自细胞系和患者液体活检的无细胞DNA (cfDNA) 验证了BRAF^V600E检测.

主要成果:

阿特米斯确定了12%的致病性SNV是可识别的Cas12a,包括928种与癌症相关的变异.
在种子区域,Cas12a对单个不匹配有显著的耐受性.
合成不匹配的战略引入使单核酸检测准确度成为可能.
在cfDNA中实现了BRAF^V600E的准确检测和半量化,证明了临床潜力.

结论:

合理化的crRNA设计,包括特定的不匹配,可以显著提高基于Cas12a的诊断特异性.
这种方法为实现个性化和成本效益高的瘤诊断提供了通往高保真度CRISPRdx的途径.
这些发现支持开发用于癌症诊断和监测的先进CRISPRdx工具.

关键词:

在BRAF V600E中使用.CP:癌症生物学癌症生物学科普:遗传学在CP:遗传学.克里斯普尔是什么意思?克里斯普尔是什么意思?这就是Cas12a.在SNP中,SNP是SNP.这是SNVSNV.癌症癌症癌症癌症癌症 cfDNA DNA 的时间.诊断诊断诊断诊断诊断液体活检活检液体活检黑色素瘤是一种黑色素瘤.

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