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Berezovska A, Meiller A, Marinesco S, Nedellec Y, Giroud F, Gross AJ, Cosnier S. Chlorhexidine digluconate exerts bactericidal activity vs. gram positive Staphylococci with bioelectrocatalytic compatibility: High level disinfection for implantable biofuel cells. Bioelectrochemistry 2023; 152:108435. [PMID: 37099859 DOI: 10.1016/j.bioelechem.2023.108435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/17/2023] [Accepted: 04/01/2023] [Indexed: 04/08/2023]
Abstract
Implanted devices destined for contact with sterile body tissues, vasculature or fluids should be free of any microbial contamination that could lead to disease transmission. The disinfection and sterilisation of implantable biofuel cells is a challenging and largely overlooked subject due to the incompatibility of fragile biocatalytic components with classical treatments. Here we report the development of a convenient "soft" chemical treatment based on immersion of enzymatic bioelectrodes and biofuel cells in dilute aqueous chlorhexidine digluconate (CHx). We show that immersion treatment in a 0.5 % solution of CHx for 5 min is sufficient to remove 10-6 log colony forming units of Staphylococcus hominis after 26 h while shorter treatments are less effective. Treatments with 0.2 % CHx solutions were ineffective. Bioelectrocatalytic half-cell voltammetry revealed no loss in activity at the bioanode after the bactericidal treatment, while the cathode was less tolerant. A maximum power output loss of ca. 10 % for the glucose/O2 biofuel cell was observed following the 5 min CHx treatment, while the dialysis bag had a significant negative impact on the power output. Finally, we report a proof-of-concept in vivo operation for 4 days of a CHx-treated biofuel cell with a 3D printed holder and additional porous surgical tissue interface. Further assessments are necessary to rigorously validate sterilisation, biocompatibility and tissue response performance.
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Affiliation(s)
- Anastasiia Berezovska
- Département de Chimie Moléculaire (DCM), Univ. Grenoble Alpes - CNRS 570 rue de la Chimie, 38041 Grenoble, France
| | - Anne Meiller
- Lyon Neuroscience Research Center, Team TIGER, BELIV technological platform, Univ. of Lyon, CNRS UMR5292, Inserm U1028, Lyon, France Centre Hospitalier Le Vinatier, Bat Neurocampus, 95 Bd Pinel, 69675 Bron cedex, France
| | - Stéphane Marinesco
- Lyon Neuroscience Research Center, Team TIGER, BELIV technological platform, Univ. of Lyon, CNRS UMR5292, Inserm U1028, Lyon, France Centre Hospitalier Le Vinatier, Bat Neurocampus, 95 Bd Pinel, 69675 Bron cedex, France
| | - Yannig Nedellec
- Département de Chimie Moléculaire (DCM), Univ. Grenoble Alpes - CNRS 570 rue de la Chimie, 38041 Grenoble, France
| | - Fabien Giroud
- Département de Chimie Moléculaire (DCM), Univ. Grenoble Alpes - CNRS 570 rue de la Chimie, 38041 Grenoble, France
| | - Andrew J Gross
- Département de Chimie Moléculaire (DCM), Univ. Grenoble Alpes - CNRS 570 rue de la Chimie, 38041 Grenoble, France.
| | - Serge Cosnier
- Département de Chimie Moléculaire (DCM), Univ. Grenoble Alpes - CNRS 570 rue de la Chimie, 38041 Grenoble, France.
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Ryu DS, Won DS, Kim JW, Park Y, Kim SH, Kang JM, Zeng CH, Lim D, Choi H, Park JH. Efficacy of thermoplastic polyurethane and gelatin blended nanofibers covered stent graft in the porcine iliac artery. Sci Rep 2022; 12:16524. [PMID: 36192510 PMCID: PMC9529973 DOI: 10.1038/s41598-022-20950-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 09/21/2022] [Indexed: 11/09/2022] Open
Abstract
Stent-grafts composed of expanded polytetrafluoroethylene (e-PTFE), polyethylene terephthalate (PET) and polyurethane (PU) are characterized by poor endothelialization, high modulus, and low compliance, leading to thrombosis and intimal hyperplasia. A composite synthetic/natural matrix is considered a promising alternative to conventional synthetic stent-grafts. This study aimed to investigate the efficacy of thermoplastic polyurethane (TPU) and gelatin (GL) blended nanofibers (NFs) covered stent-graft in the porcine iliac artery. Twelve pigs were randomly sacrificed 7 days (n = 6) and 28 days (n = 6) after stent-graft placement. The thrombogenicity score at 28 days was significantly increased compared at 7 days (p < 0.001). The thickness of neointimal hyperplasia, degree of inflammatory cell infiltration, and degree of collagen deposition were significantly higher at 28 days than at 7 days (all p < 0.001). The TPU and GL blended NFs-covered stent-grafts successfully maintained the patency for 28 days in the porcine iliac artery. Although thrombosis with neointimal tissue were observed, no subsequent occlusion of the stent-graft was noted until the end of the study. Composite synthetic/natural matrix-covered stent-grafts may be promising for prolonging stent-graft patency.
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Affiliation(s)
- Dae Sung Ryu
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Dong-Sung Won
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Ji Won Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Yubeen Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Song Hee Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Jeon Min Kang
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Chu Hui Zeng
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Dohyung Lim
- Department of Mechanical Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul, 05006, Republic of Korea
| | - Hyun Choi
- Department of Mechanical Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul, 05006, Republic of Korea.
| | - Jung-Hoon Park
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
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Crépy L, Monchau F, Chai F, Raoul G, Hivart P, Hildebrand HF, Martin P, Joly N. Evaluation of a bio-based hydrophobic cellulose laurate film as biomaterial--study on biodegradation and cytocompatibility. J Biomed Mater Res B Appl Biomater 2012; 100:1000-8. [PMID: 22323390 DOI: 10.1002/jbm.b.32665] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 10/21/2011] [Accepted: 11/22/2011] [Indexed: 11/07/2022]
Abstract
The study aims to validate an original bio-based material, obtained by grafting fatty chains, and more especially lauric chains (C12) onto cellulose, for medical applications. The mechanical properties of the synthesized cellulose laurate (C12) are close to those of petrochemical ones such as low density polyethylene. This cellulose-based polymer is transparent, flexible, and hydrophobic. To evaluate the stability of the cellulosic films in biological fluids the samples are soaked in simulated body fluid or blood plasma for a few hours to 6 months, and then submitted to mechanical and chemical analyses. The simultaneously performed cytocompatibility tests were the colony-forming viability, the vitality and cell proliferation tests using NIH 3T3 fibroblasts and MC 3T3 osteoblast-like cells. The results show the stability, the biocompatibility, and the noncytotoxicity of the synthesized cellulose laurate films. This biomaterial may so be considered for surgical applications.
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Affiliation(s)
- Lucie Crépy
- Université Lille Nord de France, Lille, France
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Dimitrievska S, Petit A, Doillon CJ, Epure L, Ajji A, Yahia L, Bureau MN. Effect of Sterilization on Non-woven Polyethylene Terephthalate Fiber Structures for Vascular Grafts. Macromol Biosci 2010; 11:13-21. [DOI: 10.1002/mabi.201000268] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Detta N, Errico C, Dinucci D, Puppi D, Clarke DA, Reilly GC, Chiellini F. Novel electrospun polyurethane/gelatin composite meshes for vascular grafts. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1761-9. [PMID: 20135202 DOI: 10.1007/s10856-010-4006-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2009] [Accepted: 01/20/2010] [Indexed: 05/05/2023]
Abstract
Novel polymeric micro-nanostructure meshes as blood vessels substitute have been developed and investigated as a potential solution to the lack of functional synthetic small diameter vascular prosthesis. A commercial elastomeric polyurethane (Tecoflex EG-80A) and a natural biopolymer (gelatin) were successfully co-electrospun from different spinnerets on a rotating mandrel to obtain composite meshes benefiting from the mechanical characteristics of the polyurethane and the natural biopolymer cytocompatibility. Morphological analysis showed a uniform integration of micrometric (Tecoflex) and nanometric (gelatin) fibers. Exposure of the composite meshes to vapors of aqueous glutaraldehyde solution was carried out, to stabilize the gelatin fibers in an aqueous environment. Uniaxial tensile testing in wet conditions demonstrated that the analyzed Tecoflex-Gelatin specimens possessed higher extensibility and lower elastic modulus than conventional synthetic grafts, providing a closer matching to native vessels. Biological evaluation highlighted that, as compared with meshes spun from Tecoflex alone, the electrospun composite constructs enhanced endothelial cells adhesion and proliferation, both in terms of cell number and morphology. Results suggest that composite Tecoflex-Gelatin meshes could be promising alternatives to conventional vascular grafts, deserving of further studies on both their mechanical behaviour and smooth muscle cell compatibility.
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Affiliation(s)
- Nicola Detta
- Laboratory of Bioactive Polymeric Materials for Biomedical and Environmental Applications, UdR INSTM, Department of Chemistry and Industrial Chemistry, University of Pisa, Via Vecchia Livornese 1291, 56122, San Piero a Grado, Pisa, Italy
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Abstract
Magnetic nanoparticles have attracted intensive attention for their wide applications as biomaterials and magnetic storage materials. Polyurethane is one of the most biocompatible polymers and has been used widely in vivo. In this paper, the magnetite nanoparticles were synthesized by chemical precipitation under different conditions. The as-prepared samples were characterized by X-ray diffraction and transmission electron microscopy, and their magnetic properties were evaluated on a vibrating sample magnetometer. Then the magnetite nanoparticles with different amounts were doped into polyurethane directly and composite films were made. Reinforced by the inorganic particles, PU composite films were also characterized by Fourier transform infrared spectra and mechanical tests., and the surface morphology of the composite film was observed by Atomic Force Microscope The results showed the composite material was reinforced by magnetic nanoparticles and also showed magnetic behavior. This kind of composite materials have the potential to be used as hyperthermia treatment in biomedical field, like coatings on cardiovascular stents.
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