心脏的发展. 霍普克斯对Bmp和Wnt信号的整合确定了心肌细胞的承诺
Rajan Jain1, Deqiang Li1, Mudit Gupta1
1Department of Cell and Developmental Biology, Penn Cardiovascular Institute, Institute of Regenerative Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
Science (New York, N.Y.)
|June 27, 2015
概括
研究人员确定了一种对心脏细胞发育至关重要的心肌细胞中间体. 这一发现涉及Hopx蛋白协调Bmp和Wnt信号,为心脏再生疗法提供了潜力.
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
- 发展生物学 发展生物学
背景情况:
- 心脏原生细胞分化成各种心脏细胞类型.
- 了解心肌细胞结合的中间阶段对于心脏修复至关重要.
研究的目的:
- 定义和描述心肌细胞中间体.
- 为了识别调节心肌细胞承诺的利基信号.
- 阐明Hopx在协调心脏信号通路中的作用.
主要方法:
- 表达Hopx的心肌细胞的特征.
- 对Bmp和Wnt信号通路的分析.
- 研究Hopx与Smads和Wnt基因的相互作用.
主要成果:
- 致力于心肌细胞命运的心肌细胞表达Hopx.
- 霍普克斯协调局部Bmp信号以抑制Wnt通路,促进心肌生成.
- 霍普克斯与激活的Smads进行物理相互作用,并抑制Wnt基因,整合Bmp和Wnt信号.
结论:
- 鉴定增殖性心肌细胞中间体是心脏再生疗法的关键.
- 霍普克斯介导的Bmp抑制Wnt信号传递对于成年干细胞中干细胞静止至关重要.
- 霍普克斯在干细胞调节中的作用表明其作为瘤抑制剂的重要性.
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