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被阻碍的阿基里斯肌的微机械环境
Keshia E Mora1,2,3, Samuel J Mlawer1,4, Alayna E Loiselle1,2
1Department of Biomedical Engineering, University of Rochester, Rochester, NY, 14627, USA.
Small (Weinheim an der Bergstrasse, Germany)
|July 5, 2024
概括
肌碰撞会导致显著的横向压缩,导致细胞伸展和高表面应力. 了解这些微观菌株是理解冲击诱导肌病症的关键.
科学领域:
- 生物力学 生物力学
- 细胞生物学 细胞生物学
- 整形外科 整形外科 整形外科
背景情况:
- 肌主要经历拉伸力,但骨碰撞引入横向力.
- 在肌碰撞期间的微机械应变环境尚未得到充分理解.
- 阻塞与肌的生理和病理过程有关.
研究的目的:
- 在撞击过程中描述肌中的微机械应变环境.
- 为了研究冲击诱导的力量对肌细胞及其基质的影响.
- 将实验结果与计算建模进行比较.
主要方法:
- 使用多光子显微镜对小鼠阿基里斯肌在背部屈曲诱导撞击之前和之后的图像进行了扩展.
- 在细胞外矩阵 (ECM),细胞周矩阵 (PCM) 和细胞尺度上测量了多轴菌株.
- 采用有限元模型来证实实验结果,并模拟细胞反应.
主要成果:
- 阻塞在矩阵尺度上诱导了显著的横向压缩.
- 这种压缩导致细胞纵向拉伸,细胞尺寸比增加,PCM体积压缩.
- 有限元分析显示,碰撞会产生高细胞表面应力和应变,超过纵向张力产生的应力和应变.
- 微尺度的应力和应变取决于初始的细胞间隙间隔.
结论:
- 肌碰撞在微观上创造了一个复杂的多轴应变环境.
- 阻塞引起的细胞压力和应变是相当大的,并受到细胞间距的影响.
- 这些发现为了解与撞击相关的肌病变提供了机制基础.
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