Document Detail

Mechanical behavior of human mesenchymal stem cells during adipogenic and osteogenic differentiation.
MedLine Citation:
PMID:  20117089     Owner:  NLM     Status:  MEDLINE    
Human mesenchymal stem cells (hMSCs) have gained widespread attention in the field of tissue engineering but not much is known about the changes of mechanical properties during the process of cell lineage commitment and the mechanisms of these behaviors. It is believed that exploring the inter-relations between stem cells mechanical properties and lineage commitment will shed light on the mechanobiology aspect of differentiation. hMSCs were cultured in adipogenic and osteogenic mediums and the elastic moduli were monitored using micropipette aspiration. It was found that hMSCs undergoing osteogenesis have an instantaneous Young's modulus of 890 +/- 219 Pa and an equilibrium Young's modulus of 224 +/- 40 Pa, each is about 2-fold higher than the control group. Interestingly, cells cultured in adipogenic medium exhibited a slight increase in the cellular modulus followed by a decrease relative to that of the control group. Gene expression study was employed to gain insights into this phenomenon. Concomitant up regulation of actin binding filamin A (FLNa) and gamma-Tubulin with the cellular elastic modulus indicated their important role in mechanical regulation during hMSCs differentiation. Statistical results showed that cell shape and cell area changed with cellular mechanical properties, which means that cell morphology has a close relation with cell elastic modulus in the initial stage of differentiation. Collectively, these results provide a quantitative description of hMSCs mechanical behavior during the process of differentiation as well as the possible accompanying mechanism at the biomolecular level.
Haiyang Yu; Chor Yong Tay; Wen Shing Leong; Samuel Chun Wei Tan; Kin Liao; Lay Poh Tan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-02-01
Journal Detail:
Title:  Biochemical and biophysical research communications     Volume:  393     ISSN:  1090-2104     ISO Abbreviation:  Biochem. Biophys. Res. Commun.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-03-01     Completed Date:  2010-03-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372516     Medline TA:  Biochem Biophys Res Commun     Country:  United States    
Other Details:
Languages:  eng     Pagination:  150-5     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Inc. All rights reserved.
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
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MeSH Terms
Cell Lineage / genetics*
Contractile Proteins / genetics
Elastic Modulus*
Gene Expression
Mesenchymal Stem Cells / cytology,  physiology*
Microfilament Proteins / genetics
Tissue Engineering
Tubulin / genetics
Reg. No./Substance:
0/Contractile Proteins; 0/Microfilament Proteins; 0/Tubulin; 0/filamins

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