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Li Z, Zhu W, Bi S, Li R, Hu H, Lin H, Tuan RS, Khor KA. Incorporating silica-coated graphene in bioceramic nanocomposites to simultaneously enhance mechanical and biological performance. J Biomed Mater Res A 2020; 108:1016-1027. [PMID: 31925910 DOI: 10.1002/jbm.a.36880] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 12/28/2019] [Accepted: 12/31/2019] [Indexed: 11/06/2022]
Abstract
The applications of a variety of bioactive ceramics such as hydroxyapatite (HA) in orthopedics are limited by their insufficient mechanical properties, especially poor fracture toughness. Thus, further extending the clinical applications of these materials warrants the enhancement of their mechanical properties. Although the reinforcement of ceramics by 2D nanomaterials has been well recognized, integrated structural, mechanical, and functional considerations have been neglected in the design and synthesis of such composite materials. Herein, we report the first use of silica-coated reduced graphene oxide (S-rGO) hybrid nanosheets to create bioceramic-based composites with simultaneously enhanced mechanical and biological properties. In the representative HA-based bioceramic systems prepared by spark plasma sintering, S-rGO incorporation was found to be more effective for increasing the Young's modulus, hardness, and fracture toughness than the incorporation of uncoated reduced GO (rGO). Furthermore, when assessed with osteoblast-like MG-63 cells, such novel materials led to faster cell proliferation and higher cell viability and alkaline phosphatase activity than are generally observed with pure HA; additionally, cells demonstrate stronger affinity to S-rGO/HA than to rGO/HA composites. The S-rGO/bioceramic composites are therefore promising for applications in orthopedic tissue engineering, and this research provides valuable insights into the fabrication of silica-coated hybrid nanosheet-reinforced ceramics.
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Affiliation(s)
- Zhong Li
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.,Center for Cellular and Molecular Engineering (CCME), Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Wenyu Zhu
- School of Civil & Environmental Engineering, Nanyang Technological University, Singapore
| | - Shuguang Bi
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.,School of Materials Science & Engineering, Nanyang Technological University, Singapore
| | - Ruitao Li
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore.,School of Materials Science & Engineering, Nanyang Technological University, Singapore
| | - Huanlong Hu
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Hang Lin
- Center for Cellular and Molecular Engineering (CCME), Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Rocky S Tuan
- Center for Cellular and Molecular Engineering (CCME), Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Khiam Aik Khor
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
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Luc G, Charles G, Gronnier C, Cabau M, Kalisky C, Meulle M, Bareille R, Roques S, Couraud L, Rannou J, Bordenave L, Collet D, Durand M. Decellularized and matured esophageal scaffold for circumferential esophagus replacement: Proof of concept in a pig model. Biomaterials 2018; 175:1-18. [PMID: 29793088 DOI: 10.1016/j.biomaterials.2018.05.023] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/09/2018] [Accepted: 05/14/2018] [Indexed: 10/16/2022]
Abstract
Surgical resection of the esophagus requires sacrificing a long portion of it. Its replacement by the demanding gastric pull-up or colonic interposition techniques may be avoided by using short biologic scaffolds composed of decellularized matrix (DM). The aim of this study was to prepare, characterize, and assess the in vivo remodeling of DM and its clinical impact in a preclinical model. A dynamic chemical and enzymatic decellularization protocol of porcine esophagus was set up and optimized. The resulting DM was mechanically and biologically characterized by DNA quantification, histology, and histomorphometry techniques. Then, in vitro and in vivo tests were performed, such as DM recellularization with human or porcine adipose-derived stem cells, or porcine stromal vascular fraction, and maturation in rat omentum. Finally, the DM, matured or not, was implanted as a 5-cm-long esophagus substitute in an esophagectomized pig model. The developed protocol for esophageal DM fulfilled previously established criteria of decellularization and resulted in a scaffold that maintained important biologic components and an ultrastructure consistent with a basement membrane complex. In vivo implantation was compatible with life without major clinical complications. The DM's scaffold in vitro characteristics and in vivo implantation showed a pattern of constructive remodeling mimicking major native esophageal characteristics.
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Affiliation(s)
- Guillaume Luc
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France; Inserm, Bioingénierie tissulaire, U1026, F-33000, Bordeaux, France; CHU Bordeaux, Department of Digestive Surgery, F-33000, Bordeaux, France
| | - Guillaume Charles
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France
| | - Caroline Gronnier
- Univ. Bordeaux, F-33000, Bordeaux, France; CHU Bordeaux, Department of Digestive Surgery, F-33000, Bordeaux, France
| | - Magali Cabau
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France; CHU Bordeaux, Department of Digestive Surgery, F-33000, Bordeaux, France
| | - Charlotte Kalisky
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France
| | - Mallory Meulle
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France
| | - Reine Bareille
- Univ. Bordeaux, F-33000, Bordeaux, France; Inserm, Bioingénierie tissulaire, U1026, F-33000, Bordeaux, France
| | - Samantha Roques
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France
| | - Lionel Couraud
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France; LAPVSO, F-31201, Toulouse Cedex 2, France
| | - Johanna Rannou
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France
| | - Laurence Bordenave
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France; Inserm, Bioingénierie tissulaire, U1026, F-33000, Bordeaux, France
| | - Denis Collet
- CHU Bordeaux, Department of Digestive Surgery, F-33000, Bordeaux, France
| | - Marlène Durand
- CHU Bordeaux, CIC1401, F-33000, Bordeaux, France; Univ. Bordeaux, F-33000, Bordeaux, France; Inserm, Bioingénierie tissulaire, U1026, F-33000, Bordeaux, France.
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