科希特 (CoHIT):一台超灵敏的ERA-CRISPR系统,用于检测同一站点的多个内部数据
Yin Liu1,2,3, Xinyi Liu4, Dongyi Wei5
1Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, China.
Nature communications
|June 12, 2024
概括
CoHIT是一种基于CRISPR的快速测试,用于检测急性髓性白血病 (AML) 中的NPM1等遗传突变. 这种高速测定提供了精确的癌症诊断,并有可能监测最小残留疾病.
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:
- 精确的癌症医学严重依赖于基因检测.
- 在分子诊断中,检测多个相同位置的插入或删除 (indels) 是一个重大挑战.
研究的目的:
- 开发一种基于CRISPR的快速,灵敏和特定的测定方法,用于检测indels.
- 评估COHIT (基于Cas12a的全方位高速同热试验) 测定急性髓性白血病 (AML) 中的NPM1基因突变.
主要方法:
- 科希特采用了一种经过工程设计的AsCas12a变体,具有高不匹配耐受性和广泛的PAM范围.
- 单个crRNA用于检测多个NPM1基因c.863_864 4-bp插入在一个反应中.
- 进行了反应参数的优化,以提高试验性能.
主要成果:
- 科希特 (CoHIT) 实现了0.01%的检测极限,结果可在30分钟内获得.
- 该试验没有证明与野生类型序列的交叉反应性.
- 在108名AML患者中,在30名患者中发现了NPM1突变,有可能对最小残留疾病 (MRD) 进行监测.
结论:
- 科希特是一种高效,快速的基于CRISPR的诊断工具,用于内置检测.
- 该试验对AML诊断和MRD监测的临床应用有希望.
- 科希特的适应性扩展到检测其他癌症相关基因 (KIT,BRAF,EGFR) 中的indels,以及与侧流条和微流体芯片的集成.
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