间质干细胞的力学转导及其对血液动力学的影响。
Mechanotransduction of mesenchymal stem cells and hemodynamic implications.
机构信息
Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
School of Medicine, National Tsing Hua University, Hsinchu, Taiwan.
出版信息
Chin J Physiol. 2023 Mar-Apr;66(2):55-64. doi: 10.4103/cjop.CJOP-D-22-00144.
Mesenchymal stem cells (MSCs) possess the capacity for self-renewal and multipotency. The traditional approach to manipulating MSC's fate choice predominantly relies on biochemical stimulation. Accumulating evidence also suggests the role of physical input in MSCs differentiation. Therefore, investigating mechanotransduction at the molecular level and related to tissue-specific cell functions sheds light on the responses secondary to mechanical forces. In this review, a new frontier aiming to optimize the cultural parameters was illustrated, i.e. spatial boundary condition, which recapitulates in vivo physiology and facilitates the investigations of cellular behavior. The concept of mechanical memory was additionally addressed to appreciate how MSCs store imprints from previous culture niches. Besides, different types of forces as physical stimuli were of interest based on the association with the respective signaling pathways and the differentiation outcome. The downstream mechanoreceptors and their corresponding effects were further pinpointed. The cardiovascular system or immune system may share similar mechanisms of mechanosensing and mechanotransduction; for example, resident stem cells in a vascular wall and recruited MSCs in the bloodstream experience mechanical forces such as stretch and fluid shear stress. In addition, baroreceptors or mechanosensors of endothelial cells detect changes in blood flow, pass over signals induced by mechanical stimuli and eventually maintain arterial pressure at the physiological level. These mechanosensitive receptors transduce pressure variation and regulate endothelial barrier functions. The exact signal transduction is considered context dependent but still elusive. In this review, we summarized the current evidence of how mechanical stimuli impact MSCs commitment and the underlying mechanisms. Future perspectives are anticipated to focus on the application of cardiovascular bioengineering and regenerative medicine.
间充质干细胞 (MSCs) 具有自我更新和多能性。传统的操纵 MSC 命运选择的方法主要依赖于生化刺激。越来越多的证据也表明物理输入在 MSCs 分化中的作用。因此,研究分子水平的力学转导及其与组织特异性细胞功能相关的问题,揭示了机械力引起的反应。在这篇综述中,阐述了一个旨在优化文化参数的新前沿,即空间边界条件,它再现了体内生理学,并促进了细胞行为的研究。此外,还提到了机械记忆的概念,以了解 MSCs 如何从前一个培养环境中存储印迹。另外,不同类型的力作为物理刺激,根据与相应信号通路和分化结果的关联而受到关注。下游的机械感受器及其相应的作用也被进一步指出。心血管系统或免疫系统可能具有相似的机械感觉和力学转导机制;例如,血管壁中的常驻干细胞和血液中的募集 MSC 会经历拉伸和流体切应力等机械力。此外,内皮细胞的压力感受器或机械感受器会检测血流变化,传递由机械刺激引起的信号,最终将动脉血压维持在生理水平。这些机械敏感受体可转换压力变化并调节内皮屏障功能。确切的信号转导被认为是上下文相关的,但仍然难以捉摸。在这篇综述中,我们总结了机械刺激对 MSCs 分化的影响及其潜在机制的现有证据。未来的研究方向预计将集中在心血管生物工程和再生医学的应用上。