Collagen gel three-dimensional matrices combined with adhesive proteins stimulate neuronal differentiation of mesenchymal stem cells.
Three-dimensional gel matrices provide specialized microenvironments that mimic native tissues and enable stem cells to grow and differentiate into specific cell types. Here, we show that collagen three-dimensional gel matrices prepared in combination with adhesive proteins, such as fibronectin (FN) and laminin (LN), provide significant cues to the differentiation into neuronal lineage of mesenchymal stem cells (MSCs) derived from rat bone marrow. When cultured within either a three-dimensional collagen gel alone or one containing either FN or LN, and free of nerve growth factor (NGF), the MSCs showed the development of numerous neurite outgrowths. These were, however, not readily observed in two-dimensional culture without the use of NGF. Immunofluorescence staining, western blot and fluorescence-activated cell sorting analyses demonstrated that a large population of cells was positive for NeuN and glial fibrillary acidic protein, which are specific to neuronal cells, when cultured in the three-dimensional collagen gel. The dependence of the neuronal differentiation of MSCs on the adhesive proteins containing three-dimensional gel matrices is considered to be closely related to focal adhesion kinase (FAK) activation through integrin receptor binding, as revealed by an experiment showing no neuronal outgrowth in the FAK-knockdown cells and stimulation of integrin β1 gene. The results provided herein suggest the potential role of three-dimensional collagen-based gel matrices combined with adhesive proteins in the neuronal differentiation of MSCs, even without the use of chemical differentiation factors. Furthermore, these findings suggest that three-dimensional gel matrices might be useful as nerve-regenerative scaffolds.
Institute of Tissue Regeneration Engineering (ITREN), Dankook University, , South Korea.
Jae Ho
JH
Lee
Hye-Sun
HS
Yu
Gil-Su
GS
Lee
Aeri
A
Ji
Jung Keun
JK
Hyun
Hae-Won
HW
Kim
D000199:Actins / Q000378:metabolism; D000818:Animals; D034961:Antigens, Nuclear / Q000378:metabolism; D015153:Blotting, Western; D002454:Cell Differentiation / Q000502:physiology*; D003094:Collagen / Q000502:physiology*; D005353:Fibronectins / Q000502:physiology*; D005434:Flow Cytometry; D051416:Focal Adhesion Protein-Tyrosine Kinases / Q000378:metabolism; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D007150:Immunohistochemistry; D007797:Laminin / Q000502:physiology*; D008297:Male; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000502:physiology*; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009474:Neurons / Q000166:cytology / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D023822:Tissue Engineering / Q000379:methods*
D000199:Actins; D034961:Antigens, Nuclear; D005353:Fibronectins; D005904:Glial Fibrillary Acidic Protein; D007797:Laminin; D009419:Nerve Tissue Proteins; C546339:Rbfox3 protein, rat; D003094:Collagen; D051416:Focal Adhesion Protein-Tyrosine Kinases
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