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Jiang K, Wang K, Luo C, Su BY, Du H, Liu Y, Lei J, Luo E, Cardon L, Edeleva M, Huang SS, Xu JZ, Li ZM. A Biomimetic Fibrous Composite Scaffold with Nanotopography-Regulated Mineralization for Bone Defect Repair. Biomacromolecules 2024; 25:3784-3794. [PMID: 38743836 DOI: 10.1021/acs.biomac.4c00378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
The effective regeneration of large bone defects via bone tissue engineering is challenging due to the difficulty in creating an osteogenic microenvironment. Inspired by the fibrillar architecture of the natural extracellular matrix, we developed a nanoscale bioengineering strategy to produce bone fibril-like composite scaffolds with enhanced osteogenic capability. To activate the surface for biofunctionalization, self-adaptive ridge-like nanolamellae were constructed on poly(ε-caprolactone) (PCL) electrospinning scaffolds via surface-directed epitaxial crystallization. This unique nanotopography with a markedly increased specific surface area offered abundant nucleation sites for Ca2+ recruitment, leading to a 5-fold greater deposition weight of hydroxyapatite than that of the pristine PCL scaffold under stimulated physiological conditions. Bone marrow mesenchymal stem cells (BMSCs) cultured on bone fibril-like scaffolds exhibited enhanced adhesion, proliferation, and osteogenic differentiation in vitro. In a rat calvarial defect model, the bone fibril-like scaffold significantly accelerated bone regeneration, as evidenced by micro-CT, histological histological and immunofluorescence staining. This work provides the way for recapitulating the osteogenic microenvironment in tissue-engineered scaffolds for bone repair.
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Affiliation(s)
- Kai Jiang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Kai Wang
- Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Chuan Luo
- Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Biao-Yao Su
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hao Du
- Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Yao Liu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Jun Lei
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - En Luo
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Ludwig Cardon
- Centre for Polymer and Material Technologies, Department of Materials Textiles and Chemical Engineering, Ghent University, Technologiepark-Zwijnaarde 130, Gent 9052, Belgium
| | - Mariya Edeleva
- Centre for Polymer and Material Technologies, Department of Materials Textiles and Chemical Engineering, Ghent University, Technologiepark-Zwijnaarde 130, Gent 9052, Belgium
| | - Shi-Shu Huang
- Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu 610065, China
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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Zhang B, Pei Z, He W, Feng W, Hao T, Sun M, Yang X, Wang X, Kong X, Chang J, Liu G, Bai R, Wang C, Zheng F. 3D-printed porous zinc scaffold combined with bioactive serum exosomes promotes bone defect repair in rabbit radius. Aging (Albany NY) 2024; 16:9625-9648. [PMID: 38829771 PMCID: PMC11210218 DOI: 10.18632/aging.205891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 04/25/2024] [Indexed: 06/05/2024]
Abstract
Currently, the repair of large bone defects still faces numerous challenges, with the most crucial being the lack of large bone grafts with good osteogenic properties. In this study, a novel bone repair implant (degradable porous zinc scaffold/BF Exo composite implant) was developed by utilizing laser melting rapid prototyping 3D printing technology to fabricate a porous zinc scaffold, combining it under vacuum conditions with highly bioactive serum exosomes (BF EXO) and Poloxamer 407 thermosensitive hydrogel. The electron microscope revealed the presence of tea saucer-shaped exosomes with a double-layered membrane structure, ranging in diameter from 30-150 nm, with an average size of 86.3 nm and a concentration of 3.28E+09 particles/mL. In vitro experiments demonstrated that the zinc scaffold displayed no significant cytotoxicity, and loading exosomes enhanced the zinc scaffold's ability to promote osteogenic cell activity while inhibiting osteoclast activity. In vivo experiments on rabbits indicated that the hepatic and renal toxicity of the zinc scaffold decreased over time, and the loading of exosomes alleviated the hepatic and renal toxic effects of the zinc scaffold. Throughout various stages of repairing radial bone defects in rabbits, loading exosomes reinforced the zinc scaffold's capacity to enhance osteogenic cell activity, suppress osteoclast activity, and promote angiogenesis. This effect may be attributed to BF Exo's regulation of p38/STAT1 signaling. This study signifies that the combined treatment of degradable porous zinc scaffolds and BF Exo is an effective and biocompatible strategy for bone defect repair therapy.
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Affiliation(s)
- Baoxin Zhang
- Department of Orthopedic Surgery, Suzhou Medical College of Soochow University, Suzhou 215000, Jiangsu, China
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Zhiwei Pei
- Graduate School of Inner Mongolia Medical University, Hohhot 010050, China
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Wanxiong He
- Graduate School of Inner Mongolia Medical University, Hohhot 010050, China
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Wei Feng
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Ting Hao
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Mingqi Sun
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Xiaolong Yang
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Xing Wang
- Department of Orthopedic Surgery, Bayannur City Hospital, Bayannur 015000, China
| | - Xiangyu Kong
- Graduate School of Inner Mongolia Medical University, Hohhot 010050, China
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Jiale Chang
- Graduate School of Inner Mongolia Medical University, Hohhot 010050, China
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Guanghui Liu
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Rui Bai
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - Chang Wang
- Department of Biomaterials Research Center, Shaanxi Key Laboratory of Biomedical Metallic Materials, Northwest Institute for Non-ferrous Metal Research, Shaanxi 710016, Xi’an, China
| | - Feng Zheng
- Department of Orthopedic Surgery, Suzhou Medical College of Soochow University, Suzhou 215000, Jiangsu, China
- Department of Orthopedic Surgery, Qinghai Provincial People’s Hospital, Xining 810000, Qinghai, China
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Palai D, De A, Prasad PS, Roy T, Mukherjee S, Dhara S, Das S, Das K. Feasibility Insights of the Green-Assisted Calcium-Phosphate Coating on Biodegradable Zinc Alloys for Biomedical Application: In Vitro and In Vivo Studies. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38699930 DOI: 10.1021/acsami.4c02540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
In the field of bone tissue engineering, recently developed Zn alloy scaffolds are considered potential candidates for biodegradable implants for bone regeneration and defect reconstruction. However, the clinical success of these alloys is limited due to their insufficient surface bioactivities. Further, the higher concentration of Zn2+ produced during degradation promotes antibacterial activity, but deteriorates osteogenic properties. This study fabricated an Azadirachta indica (neem)-assisted brushite-hydroxyapatite (HAp) coating on the recently developed Zn-2Cu-0.5Mg alloy to tackle the above dilemma. The microstructure, degradation behavior, antibacterial activity, and hemocompatibility, along with in vitro and in vivo cytocompatibility of the coated alloys, are systematically investigated. Microstructural analysis reveals flower-like morphology with uniformly grown flakes for neem-assisted deposition. The neem-assisted deposition significantly improves the adhesion strength from 12.7 to 18.8 MPa, enhancing the mechanical integrity. The potentiodynamic polarization study shows that the neem-assisted deposition decreases the degradation rate, with the lowest degradation rate of 0.027 mm/yr for the ZHN2 sample. In addition, the biomineralization process shows the apatite formation on the deposited coating after 21 days of immersion. In vitro cytotoxicity assay exhibits the maximum cell viability of 117% for neem-assisted coated alloy in 30% extract after 5d and the improved cytocompatibility which is due to the controlled release of Zn2+ ions. Meanwhile, neem-assisted coated alloy increases the ZOI by 32 and 24% for Gram-positive and Gram-negative bacteria, respectively. Acceptable hemolysis (<5%) and anticoagulation parameters demonstrate a promising hemocompatibility of the coated alloy. In vivo implantation illustrates a slight inflammatory response and vascularization after 2 weeks of subcutaneous implantation, and neo-bone formation in the defect areas of the rat femur. Micro-CT and histology studies demonstrate better osseointegration with satisfactory biosafety response for the neem-assisted coated alloy as compared to that without neem-assisted deposition. Hence, this neem-assisted brushite-Hap coating strategy elucidates a new perspective on the surface modification of biodegradable implants for the treatment of bone defects.
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Affiliation(s)
- Debajyoti Palai
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Amiyangshu De
- Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - P Siva Prasad
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Trina Roy
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sayan Mukherjee
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Santanu Dhara
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Siddhartha Das
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Karabi Das
- Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Liu X, Feng Z, Ran Z, Zeng Y, Cao G, Li X, Ye H, Wang M, Liang W, He Y. External Stimuli-Responsive Strategies for Surface Modification of Orthopedic Implants: Killing Bacteria and Enhancing Osteogenesis. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38497341 DOI: 10.1021/acsami.3c19149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Bacterial infection and insufficient osteogenic activity are the main causes of orthopedic implant failure. Conventional surface modification methods are difficult to meet the requirements for long-term implant placement. In order to better regulate the function of implant surfaces, especially to improve both the antibacterial and osteogenic activity, external stimuli-responsive (ESR) strategies have been employed for the surface modification of orthopedic implants. External stimuli act as "smart switches" to regulate the surface interactions with bacteria and cells. The balance between antibacterial and osteogenic capabilities of implant surfaces can be achieved through these specific ESR manifestations, including temperature changes, reactive oxygen species production, controlled release of bioactive molecules, controlled release of functional ions, etc. This Review summarizes the recent progress on different ESR strategies (based on light, ultrasound, electric, and magnetic fields) that can effectively balance antibacterial performance and osteogenic capability of orthopedic implants. Furthermore, the current limitations and challenges of ESR strategies for surface modification of orthopedic implants as well as future development direction are also discussed.
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Affiliation(s)
- Xujie Liu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhenzhen Feng
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhili Ran
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yaoxun Zeng
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Guining Cao
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Xinyi Li
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Huiling Ye
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Meijing Wang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Wanting Liang
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
| | - Yan He
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China
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Jin X, Xie D, Zhang Z, Liu A, Wang M, Dai J, Wang X, Deng H, Liang Y, Zhao Y, Wen P, Li Y. In vitro and in vivo studies on biodegradable Zn porous scaffolds with a drug-loaded coating for the treatment of infected bone defect. Mater Today Bio 2024; 24:100885. [PMID: 38169782 PMCID: PMC10758886 DOI: 10.1016/j.mtbio.2023.100885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 01/05/2024] Open
Abstract
Additively manufactured biodegradable zinc (Zn) scaffolds have great potential to repair infected bone defects due to their osteogenic and antibacterial properties. However, the enhancement of antibacterial properties depends on a high concentration of dissolved Zn2+, which in return deteriorates osteogenic activity. In this study, a vancomycin (Van)-loaded polydopamine (PDA) coating was prepared on pure Zn porous scaffolds to solve the above dilemma. Compared with pure Zn scaffolds according to comprehensive in vitro tests, the PDA coating resulted in a slow degradation and inhibited the excessive release of Zn2+ at the early stage, thus improving cytocompatibility and osteogenic activity. Meanwhile, the addition of Van drug substantially suppressed the attachment and proliferation of S. aureus and E. coli bacterial. Furthermore, in vivo implantation confirmed the simultaneously improved osteogenic and antibacterial functions by using the pure Zn scaffolds with Van-loaded PDA coating. Therefore, it is promising to employ biodegradable Zn porous scaffolds with the proposed drug-loaded coating for the treatment of infected bone defects.
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Affiliation(s)
- Xiang Jin
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Dongxu Xie
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhenbao Zhang
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Aobo Liu
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Menglin Wang
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Jiabao Dai
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Xuan Wang
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Huanze Deng
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Yijie Liang
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
| | - Yantao Zhao
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
- Senior Department of Orthopedics, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
- Beijing Engineering Research Center of Orthopedics Implants, Beijing, 100048, China
| | - Peng Wen
- State Key Laboratory of Tribology in Advanced Equipment, Beijing, 100084, China
- Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yanfeng Li
- Postgraduate Training Base, Jinzhou Medical University and The Fourth Medical Centre, Chinese PLA General Hospital, Beijing, 10048, China
- Department of Stomatology, The Fourth Medical Centre, PLA General Hospital, Beijing, 100048, China
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Wang L, Li S, Lu D, Chen Z. Structural design of gradient porous dental implant based on orthogonal test. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2023; 41:647-652. [PMID: 38597029 PMCID: PMC10722452 DOI: 10.7518/hxkq.2023.2023188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/12/2023] [Indexed: 04/11/2024]
Abstract
OBJECTIVES To solve the current problems of loosening and dislodging caused by the high elastic modulus of solid implants, we attempted to study a gradient porous dental implant that can lower the stress concentration and reduce the elastic modulus. METHODS SolidWorks software was utilized to design the abutment and mechanical structure of the gradient porous implant. The mechanical properties of the gradient porous implant were evaluated by an orthogonal experimental design from four aspects: pore shape, pore diameter, porous layer height, and circumferential distribution. ANSYS software was used to evaluate the distribution of Von-Mises stress in the implant and its surrounding bone tissues under different structural combination parameters to derive the optimal combination of gradient porous implant parameters. RESULTS The effects of the four factors, namely, pore shape, pore diameter, porous layer height and pore distribution, on the maximum Von-Mises stress on the implant were as follows. As the pore shape became smaller and the circumferential distribution decreased, the Von-Mises stress decreased significantly. The pore diameter went from 500 μm to 600 μm and then to 700 μm. The Von-Mises stress decreased and then increased. It increased with the increase in the height of the porous layer. CONCLUSIONS The final optimal combination of parameters for the gradient porous implant was as follows: square pore shape, pore diameter of 600 μm, porous layer height of 3 mm, and quadratic step in pore distribution.
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Affiliation(s)
- Liangtao Wang
- Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Shan Li
- Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Doudou Lu
- Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Zheng Chen
- Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China
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