Original Article

Resveratrol protects bone marrow mesenchymal stem cell derived chondrocytes cultured on chitosan-gelatin scaffolds from the inhibitory effect of interleukin-1β

Authors: Ming Lei, Shi-qing Liu, Yu-lan Liu

Abstract

Aim: To investigate the effects of resveratrol on interleukin-1beta (IL-1β) induced catabolism in bone marrow mesenchymal stem cell (MSC) derived chondrocytes cultured on chitosan-gelatin scaffolds (CGS).
Methods: The chondro-genesis of alginate-encapsulated MSCs was evaluated by toluidine blue staining, RT-PCR, and immunostaing. MSC-derived chondrocyte morphology cultured on CGS was evaluated by a scanning electron microscope (SEM) and a laser confocal microscope (LCM). When these cells on CGS were pre-stimulated with IL-1β or co-treated with IL-1β and resveratrol in the absence and presence of the specific β1-integrin blocking antibody, collagen type II, aggrecan, matrix metal-loproteinase-13 (MMP-13) expression, and the translocation of nuclear factor kappaB (NF-κB) were analyzed by Western blot analysis.
Results: Transforming growth factor beta 3 (TGF-β3) combined with insulin-like growth factor I (IGF-I) induced the cartilage-specific collagen type II, aggrecan expression and extracellular matrix (ECM) accumulation at the end of a 3-week culture. CGS supported those differentiated chondrocytes' attachment, proliferation, migration, and ECM formation. When those cells cultured on CGS were stimulated with IL-1β alone, collagen type II and aggrecan expression was inhibited. However, MMP-13 expression increased. Resveratrol reversed the catabolic effects by reducing the translocation of NF-κB. A specific β1-integrin blocking antibody abrogated the effects of resveratrol on IL-1β stimulated MSC-derived chondrocytes.
Conclusion: These results indicated that resveratrol acts as a NF-κB inhibitor to protect MSC-derived chondrocytes on the CGS from the IL-1β catabolism and these effects are mediated by β1-integrin.
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