Correction for 'Therapy for cartilage defects: functional ectopic cartilage constructed by cartilage-simulating collagen, chondroitin sulfate and hyaluronic acid (CCH) hybrid hydrogel with allogeneic chondrocytes' by Xianfang Jiang et al., Biomater. Sci., 2018, 6, 1616-1626.
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Osteochondral defects (OCD) pose a significant clinical challenge due to the limited self-repair capacity of cartilage, leading to pain, joint dysfunction, and progression to osteoarthritis. Cellular implantations of adult mesenchymal stem cells (MSCs) enhanced with treatment of factors, such as small molecule Kartogenin (KGN) to promote chondrogenic differentiation, are promising but these cells often encounter hypertrophy during differentiation, compromising long-term stability. Induced pluripotent stem cell-derived MSCs (iMSCs) offer greater proliferative and differentiation capacity than MSCs and may provide a superior source of cells for cartilage repair.
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Cartilage repair remains a formidable challenge because of its limited regenerative capacity. Construction of a biomimetic hydrogel matrix that can induce cell aggregation is a promising therapeutic option. Cell aggregates are more beneficial than dissociated cells for improving survival and chondrogenic differentiation, thereby facilitating cartilage repair.
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The formation of fibrocartilage in microfracture (MFX) severely limits its long-term outlook. There is consensus in the scientific community that the placement of an appropriate scaffold in the MFX defect site can promote hyaline cartilage formation and improve therapeutic benefit. Accordingly, in this work, a novel natural biomaterial-the cartilage analog (CA)-which met criteria favorable for chondrogenesis, was evaluated in vitro to determine its candidacy as a potential MFX scaffold.
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Three-dimensional (3D) bioprinting, an additive manufacturing technology, fabricates biomimetic tissues that possess natural structure and function. It involves precise deposition of bioinks, including cells, and bioactive factors, on basis of computer-aided 3D models. Articular cartilage injurie, a common orthopedic issue.
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