Steward Andrew J, Kelly Daniel J
Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland.
Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland.
J Anat. 2015 Dec;227(6):717-31. doi: 10.1111/joa.12243. Epub 2014 Nov 9.
Biophysical cues play a key role in directing the lineage commitment of mesenchymal stem cells or multipotent stromal cells (MSCs), but the mechanotransductive mechanisms at play are still not fully understood. This review article first describes the roles of both substrate mechanics (e.g. stiffness and topography) and extrinsic mechanical cues (e.g. fluid flow, compression, hydrostatic pressure, tension) on the differentiation of MSCs. A specific focus is placed on the role of such factors in regulating the osteogenic, chondrogenic, myogenic and adipogenic differentiation of MSCs. Next, the article focuses on the cellular components, specifically integrins, ion channels, focal adhesions and the cytoskeleton, hypothesized to be involved in MSC mechanotransduction. This review aims to illustrate the strides that have been made in elucidating how MSCs sense and respond to their mechanical environment, and also to identify areas where further research is needed.
生物物理线索在引导间充质干细胞或多能基质细胞(MSC)的谱系定向分化中起着关键作用,但其中起作用的机械转导机制仍未完全了解。这篇综述文章首先描述了底物力学(如刚度和拓扑结构)和外在机械线索(如流体流动、压缩、静水压力、张力)对MSC分化的作用。特别关注这些因素在调节MSC成骨、软骨形成、肌生成和脂肪生成分化中的作用。接下来,文章重点关注被认为参与MSC机械转导的细胞成分,特别是整合素、离子通道、粘着斑和细胞骨架。这篇综述旨在阐明在解释MSC如何感知和响应其机械环境方面所取得的进展,并确定需要进一步研究的领域。
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