细胞骨架
间充质干细胞
肌动蛋白
组织工程
材料科学
细胞
细胞生物学
生物物理学
化学
生物医学工程
生物
工程类
生物化学
作者
Zahra Goli-Malekabadi,Mohammad Tafazzoli-Shadpour,Mohsen Rabbani,Mohsen Janmaleki
出处
期刊:Biomedizinische Technik
[De Gruyter]
日期:2011-01-01
卷期号:56 (5): 259-265
被引量:27
摘要
Abstract Human mesenchymal stem cells (hMSCs) are capable of self-renewal and differentiation into various cell lineages. Mechanical stimuli have been shown to regulate function of stem cells through alteration in morphology and structure. The aim of this study was to evaluate and compare effects of uniaxial static stretch and combined static-dynamic stretch on the orientation, regulation and cytoskeletal structure of hMSCs. Mean values of topological were calculated before and after loadings. Moreover, fractal dimension (FD) was employed to quantify alterations in shape complexity of the cells. Internal cytoskeletal structure of cells was observed by actin filament staining. Results demonstrated a statistically significant change in cell topology and FD due to 10% static-dynamic stretch after 24 h. Static stretch was not as influential as dynamic loading. Whereas for combined static-dynamic stretch systemic alignment of cells was detected, in the static test group local alignment of actin fibers was observed, although the entire cell network was not totally aligned in a specific direction. It was concluded that dynamic stretch leads to cytoskeletal alignment and repolarization of hMSCs, whereas static stretch does not. Under static stretch hMSCs proliferated more than under dynamic stretch. Results can be applied in tissue engineering when functionalization of stem cells is required.
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