Injectable in situ-forming hydrogel for cartilage tissue engineering
文献情報
Jin Seon Kwon, So Mi Yoon, Doo Yeon Kwon, Da Yeon Kim, Guo Zhe Tai, Ling Mei Jin, Boram Song, Bong Lee, Jae Ho Kim, Dong Keun Han, Byoung Hyun Min, Moon Suk Kim
Methoxy polyethylene glycol–poly(ε-caprolactone) (MPEG–PCL; MP) diblock copolymers undergo a solution-to-gel phase transition at body temperature and serve as ideal biomaterials for drug delivery and tissue engineering. Here, we examined the potential use of a chondrocyte-loaded MP solution as an injectable, in situ-forming hydrogel for cartilage regeneration. The chondrocyte-MP solution underwent a temperature-dependent solution-to-gel phase transition in vitro, as shown by an increase in viscosity from 1 cP at 20–30 °C to 1.6 × 105 cP at 37 °C. The chondrocytes readily attached to and proliferated on the MP hydrogel in vitro. The chondrocyte-MP solution transitioned to a hydrogel immediately after subcutaneous injection into mice, and formed an interconnected pore structure required to support the growth, proliferation, and differentiation of the chondrocytes. The chondrocyte-MP hydrogels formed cartilage in vivo, as shown by the histological and immunohistochemical staining of glycosaminoglycans, proteoglycans, and type II collagen, the major components of cartilage. Cartilage formation increased with hydrogel implantation time, and the expression of glycosaminoglycans, and type II collagen reached maximal levels at 6 weeks post-implantation. Collectively, these data suggest that in situ-forming chondrocyte-MP hydrogels have potential as non-invasive alternatives for tissue-engineered cartilage formation.
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Journal of Materials Chemistry B

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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