发展骨肌肉的方向性是由机械力决定的
Kazunori Sunadome1, Alek G Erickson1, Delf Kah2
1Department of Physiology and Pharmacology, Karolinska Institutet, 17177, Stockholm, Sweden.
Nature communications
|May 27, 2023
概括
发育中的骨在胚胎发育期间引导骨肌肉的方向. 这种涉及软骨紧张的生物机械过程对于形成定向肌纤维和功能性肌肉至关重要.
科学领域:
- 发展生物学 发展生物学
- 生物力学 生物力学
- 骨肌肉生理学 骨肌肉生理学
背景情况:
- 肌纤维细胞的方向对于肌肉骨发育至关重要,但控制肌肉方向性的机制尚不清楚.
- 了解肌细胞如何对齐和融合是肌肉形成和功能的关键.
研究的目的:
- 研究骨发育在指导骨肌肉和软组织形态发生过程中的作用.
- 阐明指导肌细胞方向和肌纤维细胞形成的生物力学线索.
主要方法:
- 在斑马鱼和小鼠模型中利用了时差实时成像.
- 进行了对软骨模式的遗传干扰和肌肉骨附着点的激光切除.
- 在试验室中使用人造附着点和可拉伸基板施加机械张力.
主要成果:
- 证明骨结构指导肢体和面部发育期间的方向肌肉外生.
- 表明软骨的模式和扩张会产生张力,影响肌纤维细胞的方向和数量.
- 证实,施加的张力可以在体外诱导肌细胞两极分化.
结论:
- 发育中的骨为骨肌形成提供了必要的生物力学指导.
- 软骨衍生的紧张是建立肌肉方向性和肌纤维组织的关键因素.
- 这种机制为工程功能骨肌肉组织提供了潜力.
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