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Zan R, Wang H, Shen S, Yang S, Yu H, Zhang X, Zhang X, Chen X, Shu M, Lu X, Xia J, Gu Y, Liu H, Zhou Y, Zhang X, Suo T. Biomimicking covalent organic frameworks nanocomposite coating for integrated enhanced anticorrosion and antifouling properties of a biodegradable magnesium stent. Acta Biomater 2024; 180:183-196. [PMID: 38604465 DOI: 10.1016/j.actbio.2024.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/25/2024] [Accepted: 04/07/2024] [Indexed: 04/13/2024]
Abstract
The utilization of biodegradable magnesium (Mg) alloys in the fabrication of temporary non-vascular stents is an innovative trend in biomedical engineering. However, the heterogeneous degradation profiles of these biomaterials, together with potential bacterial colonization that could precipitate infectious or stenotic complications, are critical obstacles precluding their widespread clinical application. In pursuit of overcoming these limitations, this study applies the principles of biomimicry, particularly the hydrophobic and anti-fouling characteristics of lotus leaves, to pioneer the creation of nanocomposite coatings. These coatings integrate poly-trimethylene carbonate (PTMC) with covalent organic frameworks (COFs), to modify the stent's surface property. The strategic design of the coating's topography, porosity, and self-polishing capabilities collectively aims to decelerate degradation processes and minimize biological adhesion. The protective qualities of the coatings were substantiated through rigorous testing in both in vitro dynamic bile tests and in vivo New Zealand rabbit choledochal models. Empirical findings from these trials confirmed that the implementation of COF-based nanocomposite coatings robustly fortifies Mg implantations, conferring heightened resistance to both biocorrosion and biofouling as well as improved biocompatibility within bodily environments. The outcomes of this research elucidate a comprehensive framework for the multifaceted strategies against stent corrosion and fouling, thereby charting a visionary pathway toward the systematic conception of a new class of reliable COF-derived surface modifications poised to amplify the efficacy of Mg-based stents. STATEMENT OF SIGNIFICANCE: Biodegradable magnesium (Mg) alloys are widely utilized in temporary stents, though their rapid degradation and susceptibility to bacterial infection pose significant challenges. Our research has developed a nanocomposite coating inspired by the lotus, integrating poly-trimethylene carbonate with covalent organic frameworks (COF). The coating achieved self-polishing property and optimal surface energy on the Mg substrate, which decelerates stent degradation and reduces biofilm formation. Comprehensive evaluations utilizing dynamic bile simulations and implantation in New Zealand rabbit choledochal models reveal that the coating improves the durability and longevity of the stent. The implications of these findings suggest the potential COF-based Mg alloy stent surface treatments and a leap forward in advancing stent performance and endurance in clinical applications.
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Affiliation(s)
- Rui Zan
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Yiwu Research Institute of Fudan University, Yiwu, 322000, China
| | - Hao Wang
- Department of Hepatobiliary and Pancreatic Surgery Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, Wuxi, 214002, China; Department of General Surgery, Jiangnan University Medical Center, Wuxi, 214000, China
| | - Sheng Shen
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Shanghai Engineering Research Center of Biliary Tract Minimal Invasive Surgery and Materials, Shanghai, 200032, China
| | - Shi Yang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Han Yu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiyue Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xian Zhang
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Xiang Chen
- Department of Hepatopancreatobiliary Surgery, Huainan Xinhua Hospital affiliated to Anhui University of Science and Technology, Huainan, 232000, China
| | - Mengxuan Shu
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Xiao Lu
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Jiazeng Xia
- Department of General Surgery, Jiangnan University Medical Center, Wuxi, 214000, China
| | - Yaqi Gu
- Department of Hepatopancreatobiliary Surgery, Huainan Xinhua Hospital affiliated to Anhui University of Science and Technology, Huainan, 232000, China
| | - Houbao Liu
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Shanghai Engineering Research Center of Biliary Tract Minimal Invasive Surgery and Materials, Shanghai, 200032, China.
| | - Yongping Zhou
- Department of Hepatobiliary and Pancreatic Surgery Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, Wuxi, 214002, China; Department of General Surgery, Jiangnan University Medical Center, Wuxi, 214000, China.
| | - Xiaonong Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Tao Suo
- Department of Biliary Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Shanghai Engineering Research Center of Biliary Tract Minimal Invasive Surgery and Materials, Shanghai, 200032, China.
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