Journal
MACROMOLECULAR BIOSCIENCE
Volume 18, Issue 10, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.201800140
Keywords
chondrocyte; fiber-reinforced; MSC; osteoarthritis; tough gel
Funding
- NIH [AR50245, AR48852, AG15768, AR48182, AG46927]
- Washington University Musculoskeletal Research Center [NIH P30 AR057235]
- Collaborative Research Center, AO Foundation, Davos, Switzerland
- Arthritis Foundation
- Nancy Taylor Foundation for Chronic Diseases
- NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES [P30AR074992, P30AR073752, P30AR057235] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON AGING [R01AG015768, R01AG046927] Funding Source: NIH RePORTER
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Biomaterial scaffolds play multiple roles in cartilage tissue engineering, including controlling architecture of newly formed tissue while facilitating growth of embedded cells and simultaneously providing functional properties to withstand the mechanical environment within the native joint. In particular, hydrogelswith high water content and desirable transport propertieswhile highly conducive to chondrogenesis, often lack functional mechanical properties. In this regard, interpenetrating polymer network (IPN) hydrogels can provide mechanical toughness greatly exceeding that of individual components; however, many IPN materials are not biocompatible for cell encapsulation. In this study, an agarose and poly(ethylene) glycol IPN hydrogel is seeded with human mesenchymal stem cells (MSCs). Results show high viability of MSCs within the IPN hydrogel, with improved mechanical properties compared to constructs comprised of individual components. These properties are further strengthened by integrating the hydrogel with a 3D woven structure. The resulting fiber-reinforced hydrogels display functional macroscopic mechanical properties mimicking those of native articular cartilage, while providing a local microenvironment that supports cellular viability and function. These findings suggest that a fiber-reinforced IPN hydrogel can support stem cell chondrogenesis while allowing for significantly enhanced, complex mechanical properties at multiple scales as compared to individual hydrogel or fiber components.
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