在正在发育的小鼠脏中堵塞形成脏的隙会产生周期性的机械应力
Louis S Prahl1,2, Jiageng Liu1,3, John M Viola1,3
1Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Nature materials
|October 9, 2024
概括
脏发育涉及脏前代细胞,在分支的尿道芽周围形成. 由于组织拥挤而产生的机械力量会影响位数和脏结构,从而影响出生时的脏捐赠.
科学领域:
- 发育生物学是发展生物学.
- 生物物理学的生物物理.
- 再生医学是一种再生医学.
背景情况:
- 脏采集管通过尿道芽分支而发展,尖端有脏原始细胞.
- 利基包装密度随着发育时间的增加而增加,并且与脏赋予相关.
- 拥挤的组织环境对利基动力学和细胞命运的影响尚不清楚.
研究的目的:
- 为了研究物理约束,特别是曲,如何影响原细胞包装.
- 为了阐明发育中的基环境的机械性质.
- 了解机械应力,利基形成和脏捐赠之间的关系.
主要方法:
- 基于脏曲率的利基包装几何形状的数学建模.
- 使用微机械分析进行实验验证,以评估组织硬化.
- 开发一种方法来估计与分支事件相对的尖端领域"年龄".
主要成果:
- 利基包装受到曲的限制,符合身体限制.
- 发育中的脏的硬化过渡被预测和实验验证在小鼠15日左右的胚胎日.
- 分支的新处施加机械阻力,取代邻居,并诱导节奏机械应力.
结论:
- 发育中的脏微环境中的物理力量和机械压力在调节原细胞位形成方面发挥着至关重要的作用.
- 了解这些生物力学原理对于洞察脏发育和设计合成再生组织至关重要.
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