包含的刚度感知指导差异化的细胞延长和力量生成跨现象型
1Department of Mechanical Engineering, Yale University, New Haven, Connecticut 06511, United States.
ACS biomaterials science & engineering
|November 27, 2025
概括
3D原体中的硬微凝引导纤维细胞和肌纤维细胞的行为,揭示了一个反循环,在这种循环中,局部刚性维持了纤维肌纤维细胞表型. 这突显了机械的异质性.
科学领域:
- 生物材料科学 生物材料科学
- 细胞生物学 细胞生物学
- 机械生物学 机械生物学
背景情况:
- 纤维化涉及纤维细胞到肌纤维细胞的过渡,受细胞外矩阵力学的影响.
- 当前的研究往往忽视了3D环境和机械异质性.
- 在3D中了解局部刚性对细胞行为的影响对于纤维化研究至关重要.
研究的目的:
- 研究3D环境中的局部矩阵刚性如何差异调节纤维细胞和肌纤维细胞的行为.
- 探索机械异质性在细胞极化,收缩和表型维护中的作用.
- 通过机械线索来发现调节纤维化进展的潜在机制.
主要方法:
- 工程3D微凝结合物复合材料,具有不同的微凝刚性.
- 嵌入的细胞尺度微凝 (软/硬) 在一个原基质.
- 在对微凝的反应中分析了细胞极化,力生成和表型标记物定位 (α-SMA,YAP).
主要成果:
- 纤维细胞和肌纤维细胞都以距离依赖的方式偏向微凝内含物.
- 肌纤维细胞表现出较慢的极化衰变,表明对机械变化的敏感性更高.
- 坚硬的微凝促进了肌纤维细胞表型的稳定性和增强的力量产生,与软的微凝或纯原不同.
结论:
- 一个现象型和刚性依赖的反循环存在:硬的入驱动肌纤维细胞极化和原重塑,加强肌纤维细胞现象型.
- 机械异质性作为纤维化过程中细胞行为的关键调节者.
- 这项研究提供了关于调节纤维化的见解,通过准细胞外基质中的机械线索来调节纤维化.
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