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Meng H, Liu X, Liu R, Zheng Y, Hou A, Liu S, He W, Wang Y, Wang A, Guo Q, Peng J. Decellularized laser micro-patterned osteochondral implants exhibit zonal recellularization and self-fixing for osteochondral regeneration in a goat model. J Orthop Translat 2024; 46:18-32. [PMID: 38774916 PMCID: PMC11106784 DOI: 10.1016/j.jot.2024.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 04/01/2024] [Accepted: 04/28/2024] [Indexed: 05/24/2024] Open
Abstract
Background Osteochondral regeneration has long been recognized as a complex and challenging project in the field of tissue engineering. In particular, reconstructing the osteochondral interface is crucial for determining the effectiveness of the repair. Although several artificial layered or gradient scaffolds have been developed recently to simulate the natural interface, the functions of this unique structure have still not been fully replicated. In this paper, we utilized laser micro-patterning technology (LMPT) to modify the natural osteochondral "plugs" for use as grafts and aimed to directly apply the functional interface unit to repair osteochondral defects in a goat model. Methods For in vitro evaluations, the optimal combination of LMPT parameters was confirmed through mechanical testing, finite element analysis, and comparing decellularization efficiency. The structural and biological properties of the laser micro-patterned osteochondral implants (LMP-OI) were verified by measuring the permeability of the interface and assessing the recellularization processes. In the goat model for osteochondral regeneration, a conical frustum-shaped defect was specifically created in the weight-bearing area of femoral condyles using a customized trephine with a variable diameter. This unreported defect shape enabled the implant to properly self-fix as expected. Results The micro-patterning with the suitable pore density and morphology increased the permeability of the LMP-OIs, accelerated decellularization, maintained mechanical stability, and provided two relative independent microenvironments for subsequent recellularization. The LMP-OIs with goat's autologous bone marrow stromal cells in the cartilage layer have securely integrated into the osteochondral defects. At 6 and 12 months after implantation, both imaging and histological assessments showed a significant improvement in the healing of the cartilage and subchondral bone. Conclusion With the natural interface unit and zonal recellularization, the LMP-OI is an ideal scaffold to repair osteochondral defects especially in large animals. The translational potential of this article These findings suggest that such a modified xenogeneic osteochondral implant could potentially be explored in clinical translation for treatment of osteochondral injuries. Furthermore, trimming a conical frustum shape to the defect region, especially for large-sized defects, may be an effective way to achieve self-fixing for the implant.
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Affiliation(s)
- Haoye Meng
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing, China
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xuejian Liu
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Ronghui Liu
- Medical Innovation & Research Division, Chinese PLA General Hospital, Beijing, China
| | - Yudong Zheng
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing, China
| | - Angyang Hou
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- Beijing Key Lab of Regenerative Medicine in Orthopaedics, Beijing, China
| | - Shuyun Liu
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- Beijing Key Lab of Regenerative Medicine in Orthopaedics, Beijing, China
| | - Wei He
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing, China
| | - Yu Wang
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- Beijing Key Lab of Regenerative Medicine in Orthopaedics, Beijing, China
| | - Aiyuan Wang
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- Beijing Key Lab of Regenerative Medicine in Orthopaedics, Beijing, China
| | - Quanyi Guo
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- Beijing Key Lab of Regenerative Medicine in Orthopaedics, Beijing, China
| | - Jiang Peng
- Institute of Orthopaedics, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- Beijing Key Lab of Regenerative Medicine in Orthopaedics, Beijing, China
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Ferraro W, Civilleri A, Gögele C, Carbone C, Vitrano I, Carfi Pavia F, Brucato V, La Carrubba V, Werner C, Schäfer-Eckart K, Schulze-Tanzil G. The Phenotype of Mesenchymal Stromal Cell and Articular Chondrocyte Cocultures on Highly Porous Bilayer Poly-L-Lactic Acid Scaffolds Produced by Thermally Induced Phase Separation and Supplemented with Hydroxyapatite. Polymers (Basel) 2024; 16:331. [PMID: 38337220 DOI: 10.3390/polym16030331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/15/2024] [Accepted: 01/21/2024] [Indexed: 02/12/2024] Open
Abstract
Bilayer scaffolds could provide a suitable topology for osteochondral defect repair mimicking cartilage and subchondral bone architecture. Hence, they could facilitate the chondro- and osteogenic lineage commitment of multipotent mesenchymal stromal cells (MSCs) with hydroxyapatite, the major inorganic component of bone, stimulating osteogenesis. Highly porous poly-L-lactic acid (PLLA) scaffolds with two layers of different pore sizes (100 and 250 µm) and hydroxyapatite (HA) supplementation were established by thermally induced phase separation (TIPS) to study growth and osteogenesis of human (h) MSCs. The topology of the scaffold prepared via TIPS was characterized using scanning electron microscopy (SEM), a microCT scan, pycnometry and gravimetric analysis. HMSCs and porcine articular chondrocytes (pACs) were seeded on the PLLA scaffolds without/with 5% HA for 1 and 7 days, and the cell attachment, survival, morphology, proliferation and gene expression of cartilage- and bone-related markers as well as sulfated glycosaminoglycan (sGAG) synthesis were monitored. All scaffold variants were cytocompatible, and hMSCs survived for the whole culture period. Cross-sections revealed living cells that also colonized inner scaffold areas, producing an extracellular matrix (ECM) containing sGAGs. The gene expression of cartilage and bone markers could be detected. HA represents a cytocompatible supplement in PLLA composite scaffolds intended for osteochondral defects.
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Affiliation(s)
- Wally Ferraro
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Aurelio Civilleri
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Clemens Gögele
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany
| | - Camilla Carbone
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Ilenia Vitrano
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Francesco Carfi Pavia
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Valerio Brucato
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Vincenzo La Carrubba
- Engineering Department, Università degli Studi di Palermo, V.le delle Scienze Building 6, 90128 Palermo, Italy
| | - Christian Werner
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany
| | | | - Gundula Schulze-Tanzil
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany
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Chen L, Wei L, Su X, Qin L, Xu Z, Huang X, Chen H, Hu N. Preparation and Characterization of Biomimetic Functional Scaffold with Gradient Structure for Osteochondral Defect Repair. Bioengineering (Basel) 2023; 10:bioengineering10020213. [PMID: 36829707 PMCID: PMC9952804 DOI: 10.3390/bioengineering10020213] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/20/2023] [Accepted: 02/03/2023] [Indexed: 02/08/2023] Open
Abstract
Osteochondral (OC) defects cannot adequately repair themselves due to their sophisticated layered structure and lack of blood supply in cartilage. Although therapeutic interventions are reaching an advanced stage, current clinical therapies to repair defects are in their infancy. Among the possible therapies, OC tissue engineering has shown considerable promise, and multiple approaches utilizing scaffolds, cells, and bioactive factors have been pursued. The most recent trend in OC tissue engineering has been to design gradient scaffolds using different materials and construction strategies (such as bi-layered, multi-layered, and continuous gradient structures) to mimic the physiological and mechanical properties of OC tissues while further enabling OC repair. This review focuses specifically on design and construction strategies for gradient scaffolds and their role in the successful engineering of OC tissues. The current dilemmas in the field of OC defect repair and the efforts of tissue engineering to address these challenges were reviewed. In addition, the advantages and limitations of the typical fabrication techniques for gradient scaffolds were discussed, with examples of recent studies summarizing the future prospects for integrated gradient scaffold construction. This updated and enlightening review could provide insights into our current understanding of gradient scaffolds in OC tissue engineering.
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Affiliation(s)
| | | | | | | | | | - Xiao Huang
- Correspondence: (X.H.); (H.C.); (N.H.); Tel.: +86-023-89011202 (X.H. & H.C. & N.H.)
| | - Hong Chen
- Correspondence: (X.H.); (H.C.); (N.H.); Tel.: +86-023-89011202 (X.H. & H.C. & N.H.)
| | - Ning Hu
- Correspondence: (X.H.); (H.C.); (N.H.); Tel.: +86-023-89011202 (X.H. & H.C. & N.H.)
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