3D cell-printing of gradient multi-tissue interfaces for rotator cuff regeneration
- 3D cell-printing of gradient multi-tissue interfaces for rotator cuff regeneration
- CHAE, SUHUN; YONG, UIJUNG; PARK, WONBIN; CHOI, YOO MI; JEON, IN-HO; KANG, HOMAN; JANG, JIN AH; CHOI, HAK SOO; CHO, DONG WOO
- Date Issued
- Owing to the prevalence of rotator cuff (RC) injuries and suboptimal healing outcome, rapid and functional regeneration of the tendon–bone interface (TBI) after RC repair continues to be a major clinical challenge. Given the essential role of the RC in shoulder movement, the engineering of biomimetic multi-tissue constructs presents an opportunity for complex TBI reconstruction after RC repair. Here, we propose a gradient cell-laden multi-tissue construct combined with compositional gradient TBI-specific bioinks via 3D cell-printing technology. In vitro studies demonstrated the capability of a gradient scaffold system in zone-specific inducibility and multi-tissue formation mimicking TBI. The regenerative performance of the gradient scaffold on RC regeneration was determined using a rat RC repair model. In particular, we adopted nondestructive, consecutive, and tissue-targeted near-infrared fluorescence imaging to visualize the direct anatomical change and the intricate RC regeneration progression in real time in vivo. Furthermore, the 3D cell-printed implant promotes effective restoration of shoulder locomotion function and accelerates TBI healing in vivo. In summary, this study identifies the therapeutic contribution of cell-printed constructs towards functional RC regeneration, demonstrating the translational potential of biomimetic gradient constructs for the clinical repair of multi-tissue interfaces. © 2022 The Authors
- Article Type
- Bioactive Materials, vol. 19, page. 611 - 625, 2023-01
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