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在体内CRISPR查揭示了KMT2D和TP53缺陷在B细胞淋巴发育中的合作

Kentaro Yamaguchi¹, Junji Koya¹, Kota Mizuno²

¹National Cancer Center Research Institute, Tokyo, Japan.

|July 17, 2025

概括

在体内CRISPR查显示,KMT2D和TP53变异在扩散性大B细胞淋巴瘤 (DLBCL) 中合作,影响预后和YAP1通路激活. 向YAP1显示了DLBCL的治疗潜力. 关键词:DLBCL,CRISPR查,KMT2D,TP53,YAP1. 这就是我们的目标.

科学领域:

* 血液学恶性瘤血液学恶性瘤
* 癌症基因组学
* 鼠标建模 * 鼠标建模

背景情况:

*已经确定了扩散性大B细胞淋巴瘤 (DLBCL) 的遗传变化,但它们的生物学意义尚不清楚.
* 了解基因合作和瘤驱动因素对于开发向疗法至关重要.

研究的目的:

* 通过体内CRISPR功能丧失查,研究DLBCL中改变的基因的致癌性.
* 确定合作的基因变异及其对DLBCL发育和进展的影响.
* 探索Hippo路径组件YAP1在KMT2D/TP53改变DLBCL中的作用.

主要方法:

* 在体内进行了CRISPR功能丧失查,针对小鼠的86个DLBCL相关基因.
* 采用全外因子测序来识别第二次撞击的驱动器变化.
* 采用转录组和染色质可访问性分析来研究通路激活.
*经过验证的研究结果使用基因和药理学抑制YAP1.

主要成果:

*CRISPR查发现Kmt2d,Pax5和Trp53在B型淋巴瘤中显著丰富.
*发现同时发生的KMT2D和TP53突变在人类DLBCL中普遍存在,特别是在复发/耐药病例中,并且与更差的预后有关.
*YAP1在双重KMT2D/TP53改变的B淋巴瘤中过度表达,TEAD1结合基因在可访问的染色质区域中得到丰富.
* 抑制YAP1抑制了体外和体内瘤生长,并在小鼠模型中延长了生存时间.

结论:

*体内CRISPR查有效地将人类癌症基因组与DLBCL研究的小鼠模型集成在一起.
*KMT2D和TP53异常之间的功能相互作用驱动DLBCL病原体,并影响患者的结果.
* YAP1代表了对KMT2D/TP53变异DLBCL的有希望的治疗标.

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