一种新的转录因子组合,用于直接重新编程到自发收缩的人类心肌细胞样状态
Marisol Romero-Tejeda1, Hananeh Fonoudi1, Carly J Weddle1
1Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; Center for Pharmacogenomics, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Journal of molecular and cellular cardiology
|July 8, 2023
概括
研究人员发现了一种转录因子 (MST) 的新组合,该组合能够成功地将人类纤维细胞重新编程成类似心肌细胞的细胞. 这一突破推动了潜在的再生医学应用的直接心脏重编程.
科学领域:
- 心血管生物学 心血管生物学
- 干细胞生物学 干细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 将体细胞直接重编程为心肌细胞样细胞在小鼠中是成功的,但在人类中是有限的.
- 这种限制阻碍了再生医学的临床应用.
- 转录因子要求的跨物种差异被假设为原因.
研究的目的:
- 确定用于直接人类心脏重编程的新型转录因子组合.
- 为了克服纤维细胞转化为心肌细胞的特定物种障碍.
- 推进直接心脏重编程的临床潜力.
主要方法:
- 利用基于网络的算法Mogrify来识别转录因子候选者.
- 开发了一个使用声学液体处理和动力成像细胞计学的自动化,高通量选平台.
- 在患者特定的人类心脏纤维细胞上选了4960种转录因子组合.
主要成果:
- 确定了MYOCD,SMAD6和TBX20 (MST) 作为最有效的重编程组合.
- 在25天内达到高达40%的TNNT2+细胞.
- 与FGF2和XAV939一起的MST尾酒诱导了自发收缩和心肌细胞类的过渡体,通过基因表达特征分析得到证实.
结论:
- 在人体细胞中直接进行心脏重编程,可以达到与小鼠模型可比的效率.
- 这项研究代表了对心脏直接重编程的临床应用的重大进展.
- 已识别的MST组合为从人类纤维细胞中产生心肌细胞样细胞提供了一个有希望的策略.
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