在产后期,GDF10促进动物心肌细胞的成熟
Maria Uscategui Calderon1, Maria L Spaeth2, Marissa Granitto3
1Molecular and Developmental Biology Graduate Program, Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA; The Heart Institute, Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Journal of molecular and cellular cardiology
|February 5, 2025
概括
由心脏纤维细胞产生的生长分化因子10 (GDF10) 对出生后心肌细胞成熟至关重要. 失去GDF10会延迟心脏发育,但在出生后的第10天它会恢复正常.
科学领域:
- 心血管生物学 心血管生物学
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 产后心脏发育包括心肌细胞和心脏纤维细胞的协调成熟.
- 心脏纤维细胞在心肌细胞成熟中发挥作用.
- 介导这种交叉通话的特定分子机制尚未完全理解.
研究的目的:
- 研究心脏纤维细胞表达的生长分化因子10 (GDF10) 在产后心脏发育中的作用.
- 确定GDF10在心肌细胞成熟中的功能,包括细胞循环停止,增大和基因表达变化.
主要方法:
- 使用新生儿大鼠心室肌细胞 (NRVM) 培养物进行体外研究.
- 用GDF10给NRVM进行评估,以评估其对心肌细胞成熟标志物的影响.
- 在GDF10处理的NRVM上进行RNA测序.
- 产生了Gdf10-null小鼠,以研究其在不同时间点 (P7和P10) 在出生后心脏发育中的体内作用.
主要成果:
- 在NRVM中GDF10的治疗促进了心肌细胞的成熟,由增加的双核化,细胞大小和成熟的sarcomeric蛋白的表达表明.
- 在NRVM中,GDF10治疗下调细胞循环进展基因和上调细胞循环抑制剂.
- 在体内,Gdf10损失延迟了心肌细胞的成熟 (细胞大小,双核化,基因表达) 和在P7.的长期线粒活动.
- 这些发育延迟在Gdf10-null小鼠中被P10正常化.
结论:
- GDF10是心脏纤维细胞和心肌细胞之间交叉通话的关键媒介.
- 在出生后,GDF10对于及时执行关键心肌细胞成熟阶段至关重要.
- 这一因素影响着双核化,高化,成熟的类异型的基因表达,以及在产后期间的细胞循环停止.
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