The changing integrin expression and a role for integrin beta 8 in the chondrogenic differentiation of mesenchymal stem cells
Author(s)
LaPointe, VLS
Verpoorte, A
Stevens, MM
Type
Journal Article
Abstract
Many cartilage tissue engineering approaches aim to differentiate human mesenchymal stem cells (hMSCs) into chondrocytes and develop cartilage in vitro by targeting cell-matrix interactions. We sought to better inform the design of cartilage tissue engineering scaffolds by understanding how integrin expression changes during chondrogenic differentiation. In three models of in vitro chondrogenesis, we studied the temporal change of cartilage phenotype markers and integrin subunits during the differentiation of hMSCs. We found that transcript expression of most subunits was conserved across the chondrogenesis models, but was significantly affected by the time-course of differentiation. In particular, ITGB8 was up-regulated and its importance in chondrogenesis was further established by a knockdown of integrin β8, which resulted in a non-hyaline cartilage phenotype, with no COL2A1 expression detected. In conclusion, we performed a systematic study of the temporal changes of integrin expression during chondrogenic differentiation in multiple chondrogenesis models, and revealed a role for integrin β8 in chondrogenesis. This work enhances our understanding of the changing adhesion requirements of hMSCs during chondrogenic differentiation and underlines the importance of integrins in establishing a cartilage phenotype.
Date Issued
2013-11-27
Date Acceptance
2013-10-19
Citation
PLoS ONE, 2013, 8 (11), pp.1-13
ISSN
1932-6203
Publisher
Public Library of Science
Start Page
1
End Page
13
Journal / Book Title
PLoS ONE
Volume
8
Issue
11
Copyright Statement
© 2013 LaPointe et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
License URL
Subjects
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
MULTIDISCIPLINARY SCIENCES
ARTICULAR-CARTILAGE
IN-VITRO
SCAFFOLD IMPLANT
MATRIX
CHONDROCYTES
REPAIR
DEFECTS
DEDIFFERENTIATION
FIBRONECTIN
INHIBITION
Publication Status
Published