患有PLEKHM2-突变的患者的hiPSCs衍生心肌细胞的功能缺陷与扩张性心肌病症和左心室非紧缩相关
Nataly Korover1, Sharon Etzion2, Alexander Cherniak3
1Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel. natalyk@post.bgu.ac.il.
Biological research
|June 22, 2023
概括
在PLEKHM2基因的突变损害了扩张性心肌病 (DCM) 患者的自和心脏功能. 患者衍生的心肌细胞显示出缺陷的收缩和处理,导致心力衰竭.
科学领域:
- 心血管生物学 心血管生物学
- 细胞和分子医学 细胞和分子医学
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 扩张性心肌病 (DCM) 是一种导致心力衰竭和突然心脏死亡的心肌疾病,原因不明.
- 之前的一项研究将自调节器PLEKHM2基因的衰减突变与DCM和左心室非紧缩 (LVNC) 联系起来.
研究的目的:
- 为了研究突变PLEKHM2对心脏组织的影响,使用患者衍生的诱导多能干细胞.
- 了解PLEKHM2突变如何影响心肌细胞功能,基因表达和自.
主要方法:
- 从具有PLEKHM2突变的DCM患者和健康对照中产生和特征诱导的多能干细胞衍生心肌细胞 (iPSC-CMs).
- 在iPSC-CM中评估了收缩性和结构性蛋白质的基因表达,瘤组织,细胞内处理和自流.
主要成果:
- 患者的iPSC-CMs表现出关键的收缩和处理蛋白的表达减少 (例如,肌重链,热素,SERCA2,CASQ2).
- 瘤细胞的排列较小,细胞的跳动速度较慢,的振幅较低,的异常瞬态动力学.
- 患者iPSC-CMs的自流受损,治疗后自细胞积累减少的证据表明.
结论:
- 突变的PLEKHM2通过影响与收缩和信号相关的基因表达,损害心肌细胞功能.
- 在患者的iPSC-CM中,缺陷的自和心脏收缩受损可能有助于DCM的病理生理学.
- 这些发现强调了PLEKHM2在心脏健康中的作用,并建议DCM的潜在治疗点.
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