Photo-crosslinked integrated triphasic scaffolds with gradient composition and strength for osteochondral regeneration

Literature Information

Publication Date 2024-01-08
DOI 10.1039/D3TB02031B
Impact Factor 6.331
Authors

Hui Li, Ping Song, Yanbo Guo, Di Luo


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Abstract

Owing to the avascular and aneural nature of cartilage tissue and the complex, multilayered structure of osteochondral units, the repair of osteochondral defects poses significant challenges. Traditional monophasic scaffolds have difficulty meeting the repair requirements of both cartilage and bone tissues, whereas multiphasic scaffolds face the issue of interfacial integration. In this study, a triphasic methylpropenylated gelatin (GELMA) hydrogel scaffold was employed to repair osteochondral defects, in which three layers of hydrogel were covalently bonded through a sequential curing process. The upper layer of the scaffold was covalently bonded with chondroitin sulfate, promoting chondrogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). The middle and lower layers of the hydrogel introduced a gradient content of hydroxyapatite, forming a scaffold with gradient mechanical strength and effectively enhancing its angiogenic and osteogenic induction capabilities. Finally, the triphasic integrated scaffold cartilage and bone repair performance was evaluated using a rabbit knee joint defect model. The results demonstrated that the scaffold facilitated accelerated regeneration of osteochondral defects, thus providing a novel strategy for the treatment of osteochondral defects.

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Journal of Materials Chemistry B

Journal of Materials Chemistry B
CiteScore: 12
Self-citation Rate: 4.9%
Articles per Year: 831

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry B are listed below. This list is neither exhaustive nor exclusive. Antifouling coatings Biocompatible materials Bioelectronics Bioimaging Biomimetics Biomineralisation Bionics Biosensors Diagnostics Drug delivery Gene delivery Immunobiology Nanomedicine Regenerative medicine & Tissue engineering Scaffolds Soft robotics Stem cells Therapeutic devices image block All articles published in Journal of Materials Chemistry B from 2019 onwards will be indexed in MEDLINE®. Articles that primarily focus on providing insight into the underlying science and performance of biomaterials within a biological environment are more suited to our companion journal, Biomaterials Science.

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