1
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Pedersen DD, Kim S, Wagner WR. Biodegradable polyurethane scaffolds in regenerative medicine: Clinical translation review. J Biomed Mater Res A 2022; 110:1460-1487. [PMID: 35481723 DOI: 10.1002/jbm.a.37394] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/07/2022] [Accepted: 04/09/2022] [Indexed: 12/14/2022]
Abstract
Early explorations of tissue engineering and regenerative medicine concepts commonly utilized simple polyesters such as polyglycolide, polylactide, and their copolymers as scaffolds. These biomaterials were deemed clinically acceptable, readily accessible, and provided processability and a generally known biological response. With experience and refinement of approaches, greater control of material properties and integrated bioactivity has received emphasis and a broadened palette of synthetic biomaterials has been employed. Biodegradable polyurethanes (PUs) have emerged as an attractive option for synthetic scaffolds in a variety of tissue applications because of their flexibility in molecular design and ability to fulfill mechanical property objectives, particularly in soft tissue applications. Biodegradable PUs are highly customizable based on their composition and processability to impart tailored mechanical and degradation behavior. Additionally, bioactive agents can be readily incorporated into these scaffolds to drive a desired biological response. Enthusiasm for biodegradable PU scaffolds has soared in recent years, leading to rapid growth in the literature documenting novel PU chemistries, scaffold designs, mechanical properties, and aspects of biocompatibility. Despite the enthusiasm in the field, there are still few examples of biodegradable PU scaffolds that have achieved regulatory approval and routine clinical use. However, there is a growing literature where biodegradable PU scaffolds are being specifically developed for a wide range of pathologies and where relevant pre-clinical models are being employed. The purpose of this review is first to highlight examples of clinically used biodegradable PU scaffolds, and then to summarize the growing body of reports on pre-clinical applications of biodegradable PU scaffolds.
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Affiliation(s)
- Drake D Pedersen
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Seungil Kim
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.,Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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2
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Farzan A, Borandeh S, Seppälä J. Conductive polyurethane/PEGylated graphene oxide composite for 3D-printed nerve guidance conduits. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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3
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Innovative High-Pressure Fabrication Processes for Porous Biomaterials-A Review. Bioengineering (Basel) 2021; 8:bioengineering8110170. [PMID: 34821736 PMCID: PMC8614988 DOI: 10.3390/bioengineering8110170] [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: 09/30/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 11/17/2022] Open
Abstract
Biomaterials and their clinical application have become well known in recent years and progress in their manufacturing processes are essential steps in their technological advancement. Great advances have been made in the field of biomaterials, including ceramics, glasses, polymers, composites, glass-ceramics and metal alloys. Dense and porous ceramics have been widely used for various biomedical applications. Current applications of bioceramics include bone grafts, spinal fusion, bone repairs, bone fillers, maxillofacial reconstruction, etc. One of the common impediments in the bioceramics and metallic porous implants for biomedical applications are their lack of mechanical strength. High-pressure processing can be a viable solution in obtaining porous biomaterials. Many properties such as mechanical properties, non-toxicity, surface modification, degradation rate, biocompatibility, corrosion rate and scaffold design are taken into consideration. The current review focuses on different manufacturing processes used for bioceramics, polymers and metals and their alloys in porous forms. Recent advances in the manufacturing technologies of porous ceramics by freeze isostatic pressure and hydrothermal processing are discussed in detail. Pressure as a parameter can be helpful in obtaining porous forms for biomaterials with increased mechanical strength.
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4
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Sun L, Li L, Wang Y, Li M, Xu S, Zhang C. A collagen-based bi-layered composite dressing for accelerated wound healing. J Tissue Viability 2021; 31:180-189. [PMID: 34538555 DOI: 10.1016/j.jtv.2021.09.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 08/10/2021] [Accepted: 09/07/2021] [Indexed: 10/20/2022]
Abstract
AIM OF THE STUDY The aim of the study was to fabricate collagen-based composite dressings, evaluate the efficiency for wound healing and reveal the mechanism of promoting wound healing. MATERIALS AND METHODS An innovative bi-layered composite wound dressing was developed using two marine biomacromolecules (collagen and chitosan). Full-thickness skin defect model was performed to evaluate the wound healing activity in vivo. The levels of inflammatory cytokines including tumor necrosis factor alpha (TNF-α), interleukin (IL-1, IL-6, IL-8) and growth factors like transforming growth factor beta (TGF-β), vascular epidermal growth factor (VEGF) and basic fibroblast growth factor (bFGF) were quantified by ELISA assays. The total amount of collagen was quantified by hydroxyproline content. The proliferation and viability of fibroblast cells cultured on collagen sponges were determined by CCK-8 assay. RESULTS The results of wound closure and histopathological analysis indicated that non-crosslinked collagen-based bi-layered composite dressing stimulated wound healing, accelerated re-epithelialization and accomplished wound healing within a time span of 28 days. The results of levels of inflammatory cytokines and growth factors showed that collagen-based composite dressings could reduce the inflammatory response and upregulate growth factors levels to accelerate the wound healing. The results of hydroxyproline content and CCK-8 assay indicated that collagen-based composite dressings could also promote collagen synthesis and fibroblasts viability and proliferation. CONCLUSION The non-crosslinked collagen-based bi-layered composite dressing could be applied for an efficient and ideal wound dressing. Therefore, the findings provided the essential theoretical basis for the potential of collagen-based composite dressing applied in wound healing fields.
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Affiliation(s)
- Leilei Sun
- College of Life Science, Yantai University, No.30, Qing Quan Road, Yantai, Shandong Province, 264005, PR China
| | - Laihao Li
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong Province, 510300, PR China.
| | - Yueqi Wang
- Key Laboratory of Aquatic Product Processing, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong Province, 510300, PR China.
| | - Mingbo Li
- College of Life Science, Yantai University, No.30, Qing Quan Road, Yantai, Shandong Province, 264005, PR China
| | - Shumin Xu
- College of Life Science, Yantai University, No.30, Qing Quan Road, Yantai, Shandong Province, 264005, PR China
| | - Chengpeng Zhang
- College of Life Science, Yantai University, No.30, Qing Quan Road, Yantai, Shandong Province, 264005, PR China
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5
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Niu Y, Liu G, Fu M, Chen C, Fu W, Zhang Z, Xia H, Stadler FJ. Designing a multifaceted bio-interface nanofiber tissue-engineered tubular scaffold graft to promote neo-vascularization for urethral regeneration. J Mater Chem B 2021; 8:1748-1758. [PMID: 32031190 DOI: 10.1039/c9tb01915d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reconstitution of urethral defects through a tissue-engineered autologous urethra is an exciting area of clinical urology research. Despite rapid advances in this field, a tissue-engineered urethra is still inaccessible to clinical applications because of the poor vascularization of the current scaffold materials, especially for the reconstruction of complex urethral defects. In this study, we report the preparation of multifaceted bio-interfacing tissue-engineered autologous scaffolds based on alternating block polyurethane (abbreviated as PU-alt), a kind of tubular scaffold with a hierarchical nanofiber architecture, flexible mechanical properties and a hydrophilic PEGylation interface capable of promoting adhesion, oriented elongation, and proliferation of New Zealand rabbit autologous urethral epithelial cells (ECs) and smooth muscle cells (SMCs) simultaneously, and also upregulating the expression of keratin (AE1/AE3) in ECs and contractile protein (α-SMA) in SMCs as well as the subsequent synthesis of elastin. Three months in vivo scaffold substitution of rabbit urethras displayed that the engineered autologous PU-alt scaffold grafts, with a coating rich in seed cell-matrix, could induce local neo-vascularization, facilitating oriented SMC remodeling and lumen epithelialization as well as patency. Our findings indicate a central role of the synergistic interplay of seed cell-matrix bio-interface and nano-topographic cues in the vascularized urethral reconstruction.
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Affiliation(s)
- Yuqing Niu
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China. and Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, P. R. China. and State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Guochang Liu
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Ming Fu
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Chuangbi Chen
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, P. R. China.
| | - Wen Fu
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Zhao Zhang
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Huimin Xia
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China. and State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Florian J Stadler
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, P. R. China.
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6
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Niu Y, Stadler FJ, Fu M. Biomimetic electrospun tubular PLLA/gelatin nanofiber scaffold promoting regeneration of sciatic nerve transection in SD rat. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 121:111858. [PMID: 33579490 DOI: 10.1016/j.msec.2020.111858] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 12/07/2020] [Accepted: 12/27/2020] [Indexed: 01/08/2023]
Abstract
The micro- or nanoscale surface morphology of the tissue engineering nerve guidance scaffold (NGS) will affect different cell behaviors, such as their growth rate, migration, and matrix secretion. Although different technologies for manufacturing scaffolds with biomimetic topography have been established, most of them tend to be high cost and long preparation time. Here we have prepared a biomimetic NGS with physical properties to simulate native nerve tissue more accurately. We used poly(l-lactic acid) (PLLA) nanofibers doped with gelatin to prepare a biomimetic NGS whose structure mimics the native epineurium layer. By adjusting the doping ratio of gelatin and PLLA in the tubular scaffold, the bionic scaffold's surface morphology and mechanical properties are closer to native tissues. In vitro cell scaffold interaction experiments demonstrated that the PLLA/gelatin nanofibers could significantly promote the elongation, proliferation, and the secretion of glial cell-derived neurotrophic factor (GDNF) of RSC96 Schwann cells (SCs), as well as the diffusion of GDNF. In vivo scaffold replacement of SD rat, sciatic nerves showed that the nerve guide scaffold composed of PLLA/gelatin nanofibers was helpful to the myelination of SCs and the remolding of epineurium in the injured area, which could effectively rehabilitate the motor and sensory functions of the injured nerve and prevent the atrophy of the target muscle tissue. This study showed that the synergistic impact of nano topographical and biochemical clues on designing biomimetic scaffolds could efficiently promote regenerating nerve tissue.
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Affiliation(s)
- Yuqing Niu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China.
| | - Florian J Stadler
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China
| | - Ming Fu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
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7
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Niu Y, Galluzzi M. A biodegradable block polyurethane nerve-guidance scaffold enhancing rapid vascularization and promoting reconstruction of transected sciatic nerve in Sprague-Dawley rats. J Mater Chem B 2020; 8:11063-11073. [PMID: 33200763 DOI: 10.1039/d0tb02069a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reconstruction of peripheral nerve defects with tissue engineered nerve scaffolds is an exciting field of biomedical research and holds potential for clinical application. However, due to poor neovascularization after the implantation, nerve regeneration is still not satisfactory, especially for large nerve defects. These obstacles hinder the investigation of basic neurobiological principles and development of a wide range of treatments for peripheral nerve diseases. Herein, we designed an amphiphilic alternating block polyurethane (abbreviated as PU) copolymer-based nerve guidance scaffold, which has good Schwann cell compatibility, and more importantly, a rapid vascularization of the scaffold in vivo. In the sciatic nerve transection model of SD rats, vascularized PU nerve guidance scaffolds induced rapid regeneration of nerve fibers and axons along the scaffold. Through the analysis of nerve electrophysiology, sciatic nerve functional index, histology, and immunofluorescence related to angiogenesis, we determined that PU with rapid vascularization function enhances recovery and re-obtains nerve conduction function. Our study points out a new strategy of using nerve tissue engineering scaffolds to treat large nerve defects.
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Affiliation(s)
- Yuqing Niu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China.
| | - Massimiliano Galluzzi
- Materials Interface Center, Shenzhen Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, China
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8
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Tian X, Lu Z, Ma C, Wu M, Zhang C, Yuan Y, Yuan X, Xie D, Liu C, Guo J. Antimicrobial hydroxyapatite and its composites for the repair of infected femoral condyle. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 121:111807. [PMID: 33579451 DOI: 10.1016/j.msec.2020.111807] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/20/2020] [Accepted: 12/11/2020] [Indexed: 12/25/2022]
Abstract
Orthopedic implant-associated infection constitutes one of the most devastating and challenging symptoms in the clinic. Implants without antimicrobial properties may become the harbourage for microbial colonization and biofilm formation, thus hindering normal bone regeneration processes. We had previously developed tannin modified HA (THA) as well as silver and tannin modified hydroxyapatite (HA) (Ag-THA) via a facile one-step and scalable process, and proven their antimicrobial performance in vitro. Herein, by compositing with non-antimicrobial polyurethane (PU), the in vivo anti-bacterial activity, osteoconductivity and osteoinductivity of PU/Ag-THA composite were investigated using an infected femoral condyle defect model on rat. PU/Ag-THA exhibited excellent in vivo antimicrobial activity, with the calculated bacteria fraction being reduced to lower than 3% at week 12 post operation. Meanwhile, PU/Ag-THA is also promising for bone regeneration under the bacteria challenge, evidenced by a final bone mineral density (BMD) ~0.6 times higher than that of the blank control at week 12. A continuous increase in BMD over time was observed in the PU/Ag-THA group, but not in the blank control and its non- or weak-antimicrobial counterparts (PU/HA and PU/THA), in which the growth rate of BMD declined after 8 weeks of operation. The enhanced osteoinductivity of PU/Ag-THA relative to blank control, PU/HA and PU/THA was also confirmed by the Runt-related transcription factor 2 (RUNX2) and osteocalcin (OCN) immunohistochemical staining. The above findings suggest that antimicrobial Ag-THA may serve as a promising and easy-to-produce antimicrobial mineral for the development of antimicrobial orthopedic composite implants to address the challenges in orthopedic surgeries, especially where infection may become a challenging condition to treat.
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Affiliation(s)
- Xinggui Tian
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China; Department of Orthopedics, The Affiliated Hospital of Southwest Medical University Luzhou, Sichuan 646000, PR China; University Hospital for Orthopedics and Accident Surgery (OUC), Carl Gustav Carus Dresden University Hospital, TU Dresden, Institute of Public Law of the Free State of Saxony, Fetscherstrasse 74, 01307, Dresden, Germany
| | - Zhihui Lu
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
| | - Chuying Ma
- Aleo BME, Inc., 200 Innovation Blvd, Suite 210A, State College, PA 16803, USA
| | - Min Wu
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
| | - Chengfei Zhang
- Department of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Yuping Yuan
- Department of Material Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xiaowei Yuan
- Department of Orthopedics, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Denghui Xie
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China.
| | - Chao Liu
- Aleo BME, Inc., 200 Innovation Blvd, Suite 210A, State College, PA 16803, USA.
| | - Jinshan Guo
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China.
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Li Q, Li L, Yu M, Zheng M, Li Y, Yang J, Dai M, Zhong L, Sun L, Lu D. Elastomeric polyurethane porous film functionalized with gastrodin for peripheral nerve regeneration. J Biomed Mater Res A 2020; 108:1713-1725. [PMID: 32196902 DOI: 10.1002/jbm.a.36937] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 03/06/2020] [Accepted: 03/09/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Qing Li
- Science and Technology Achievement Incubation CenterKunming Medical University Kunming China
| | - Limei Li
- Science and Technology Achievement Incubation CenterKunming Medical University Kunming China
| | - Mali Yu
- Science and Technology Achievement Incubation CenterKunming Medical University Kunming China
| | - Meng Zheng
- Science and Technology Achievement Incubation CenterKunming Medical University Kunming China
| | - Yao Li
- Department of StomatologyThe First People's Hospital of Yunnan Provience Kunming China
| | - Jian Yang
- Department of Biomedical EngineeringMaterials Research Institute, The Huck Institutes of The Life Sciences, The Pennsylvania State University University Park Pennsylvania USA
| | - Min Dai
- Department of Second CardiologyThe Third People's Hospital of Kunming Kunming China
| | - Lianmei Zhong
- Department of NeurologyThe First Affiliated Hospital, Kunming Medical University Kunming China
| | - Lin Sun
- Department of CardiologyThe Second Affiliated Hospital, Kunming Medical University Kunming China
| | - Di Lu
- Science and Technology Achievement Incubation CenterKunming Medical University Kunming China
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10
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Tian X, Yuan X, Feng D, Wu M, Yuan Y, Ma C, Xie D, Guo J, Liu C, Lu Z. In vivo study of polyurethane and tannin-modified hydroxyapatite composites for calvarial regeneration. J Tissue Eng 2020; 11:2041731420968030. [PMID: 33282174 PMCID: PMC7682243 DOI: 10.1177/2041731420968030] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/02/2020] [Indexed: 12/20/2022] Open
Abstract
Biomaterial mediated bone regeneration is an attractive strategy for bone defect treatment. Organic/inorganic composites have been well established as effective bone graft. Here, the bone regenerative effect of the composites made from tannic acid (TA) modified hydroxyapatite (HA) (THA) or TA & silver nanoparticles (Ag NPs) modified HA (Ag-THA) and polyurethane (PU) was evaluated on critical-sized calvarial defects in rats. The in vivo study indicates that PU/THA and PU/Ag-THA scaffolds exhibited acceptable biocompatibility and induced significantly enhanced bone mineral densities comparing with the blank control (CON) group as well as PU/HA group. The inclusion of TA on HA brought the composites with enhanced osteogenesis and angiogenesis, evidenced by osteocalcin (OCN) and vascular endothelial growth factor (VEGF) immunohistochemical staining. Tartrate resistant acid phosphatase (TRAP) staining showed high osteoclast activity along with osteogenesis, especially in PU/THA and PU/Ag-THA groups. However, further introduction of Ag NPs on HA depressed the angiogenesis of the composites, leading to even lower VEGF expression than that of CON group. This study once more proved that THA can serve as a better bone composite component that pure HA and can promote osteogenesis and angiogenesis. While, the introduction of antimicrobial Ag NPs on HA need to be controlled in some extent not to affect the angiogenesis of the composites.
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Affiliation(s)
- Xinggui Tian
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
- Department of Orthopaedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Xiaowei Yuan
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
- Department of Orthopedics, Shengjing Hospital of China Medical University, Shenyang, China
| | - Daxiong Feng
- Department of Orthopaedics, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, P. R. China
| | - Min Wu
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
| | - Yuping Yuan
- Department of Material Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | | | - Denghui Xie
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
| | - Jinshan Guo
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
| | - Chao Liu
- Aleo BME, Inc., State College, PA, USA
| | - Zhihui Lu
- Department of Histology and Embryology, School of Basic Medical Sciences, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, The Third Affiliated Hospital of Southern Medical University, Southern Medical University, Guangzhou, China
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11
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Niu Y, Liu G, Chen C, Fu M, Fu W, Zhao Z, Xia H, Stadler FJ. Urethral reconstruction using an amphiphilic tissue-engineered autologous polyurethane nanofiber scaffold with rapid vascularization function. Biomater Sci 2020; 8:2164-2174. [DOI: 10.1039/c9bm01911a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report the efficient application of a well-layered tubular amphiphilic nanofiber of a polyurethane copolymer (PU-ran) for the regulation the phenotypic expression of epithelial cells (ECs) and smooth muscle cells (SMCs) for vascularized urethral reconstruction.
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Affiliation(s)
- Yuqing Niu
- Department of Pediatric Surgery
- Guangzhou Institute of Pediatrics
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
| | - Guochang Liu
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Chuangbi Chen
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- College of Materials Science and Engineering
- Shenzhen University
| | - Ming Fu
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Wen Fu
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Zhang Zhao
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Huimin Xia
- Department of Pediatric Surgery
- Guangzhou Institute of Pediatrics
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
| | - Florian J. Stadler
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- College of Materials Science and Engineering
- Shenzhen University
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12
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Kang WB, Chen YJ, Lu DY, Yan JZ. Folic acid contributes to peripheral nerve injury repair by promoting Schwann cell proliferation, migration, and secretion of nerve growth factor. Neural Regen Res 2019; 14:132-139. [PMID: 30531087 PMCID: PMC6263007 DOI: 10.4103/1673-5374.243718] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
After peripheral nerve injury, intraperitoneal injection of folic acid improves axon quantity, increases axon density and improves electromyography results. However, the mechanisms for this remain unclear. This study explored whether folic acid promotes peripheral nerve injury repair by affecting Schwann cell function. Primary Schwann cells were obtained from rats by in vitro separation and culture. Cell proliferation, assayed using the Cell Counting Kit-8 assay, was higher in cells cultured for 72 hours with 100 mg/L folic acid compared with the control group. Cell proliferation was also higher in the 50, 100, 150, and 200 mg/L folic acid groups compared with the control group after culture for 96 hours. Proliferation was markedly higher in the 100 mg/L folic acid group compared with the 50 mg/L folic acid group and the 40 ng/L nerve growth factor group. In Transwell assays, the number of migrated Schwann cells dramatically increased after culture with 100 and 150 mg/L folic acid compared with the control group. In nerve growth factor enzyme-linked immunosorbent assays, treatment of Schwann cell cultures with 50, 100, and 150 mg/L folic acid increased levels of nerve growth factor in the culture medium compared with the control group at 3 days. The nerve growth factor concentration of Schwann cell cultures treated with 100 mg/L folic acid group was remarkably higher than that in the 50 and 150 mg/L folic acid groups at 3 days. Nerve growth factor concentration in the 10, 50, and 100 mg/L folic acid groups was higher than that in the control group at 7 days. The nerve growth factor concentration in the 50 mg/L folic acid group was remarkably higher than that in the 10 and 100 mg/L folic acid groups at 7 days. In vivo, 80 μg/kg folic acid was intraperitoneally administrated for 7 consecutive days after sciatic nerve injury. Immunohistochemical staining showed that the number of Schwann cells in the folic acid group was greater than that in the control group. We suggest that folic acid may play a role in improving the repair of peripheral nerve injury by promoting the proliferation and migration of Schwann cells and the secretion of nerve growth factors.
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Affiliation(s)
- Wei-Bo Kang
- Department of Orthopedic Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yong-Jie Chen
- Department of Orthopedic Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Du-Yi Lu
- Department of Orthopedic Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Jia-Zhi Yan
- Department of Orthopedic Surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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Feng W, Lu H, Xu Z, Chen L, Yang X, Qi Z. [Effect of cells in the epimysium conduit on the regeneration of peripheral nerve]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2018; 32:617-624. [PMID: 29806353 DOI: 10.7507/1002-1892.201712092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objective To investigate the effect of cells in the epimysium conduit (EMC) on the regeneration of sciatic nerve of mice. Methods The epimysium of the 8-week-old male C57BL/6J enhanced green fluorescent protein (EGFP) mouse was trimmed to a size of 5 mm×3 mm, and prepared in a tubular shape (ie, EMC). Some epimysia were treated with different irradiation doses (0, 15, 20, 25, 30, 35 Gy) to inhibit cells migration. Then the number of migrating cells were counted, and the epimysia with the least migrating cells were selected to prepare EMC. Some epimysia were subjected to decellularization treatment and prepared EMC. HE and Masson staining were used to identify the decellularization effect. Twenty-four C57BL/6J wild-type mice were used to prepare a 3-mm-long sciatic nerve defect of right hind limb model and randomly divided into 3 groups ( n=8). EMC (group A), EMC after cell migration inhibition treatment (group B), and decellularized EMC (group C) were used to repair defects. At 16 weeks after operation, the midline of the regenerating nerve was taken for gross, toluidine blue staining, immunofluorescence staining, and transmission electron microscopy. Results At 15 days, the number of migrating cells gradually decreased with the increase of irradiation dose. There was no significant difference between 30 Gy group and 35 Gy group ( P>0.05); there were significant differences between the other groups ( P<0.05). The epimysium after treatment with 35 Gy irradiation dose was selected for the in vivo experiment. After the decellularization of the epimysium, no nucleus was found in the epimysium and the epimysium could be sutured to prepare EMC. At 16 weeks after operation, the nerves in all groups were recanalized. The sciatic nerve was the thickest in group A, followed by group B, and the finest in group C. Immunofluorescence staining showed that the EGFP cells in group A were surrounded by regenerated axons. Toluidine blue staining and transmission electron microscopy observation showed that the number of regenerated axons and the thickness of regenerated myelin sheath in group A were significantly better than those in groups B and C ( P<0.05). There was no significant difference between groups B and C ( P>0.05). Conclusion The cellular components of the epimysium participate in and promote the regeneration of the sciatic nerve in mice.
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Affiliation(s)
- Weifeng Feng
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144, P.R.China
| | - Haibin Lu
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144, P.R.China
| | - Zhuqiu Xu
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144, P.R.China
| | - Lulu Chen
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144, P.R.China
| | - Xiaonan Yang
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144,
| | - Zuoliang Qi
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100144,
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Hsu SH, Chang WC, Yen CT. Novel flexible nerve conduits made of water-based biodegradable polyurethane
for peripheral nerve regeneration. J Biomed Mater Res A 2017; 105:1383-1392. [DOI: 10.1002/jbm.a.36022] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 01/20/2017] [Accepted: 01/26/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Shan-hui Hsu
- Institute of Polymer Science and Engineering; National Taiwan University; Taipei Taiwan
| | - Wen-Chi Chang
- Institute of Polymer Science and Engineering; National Taiwan University; Taipei Taiwan
| | - Chen-Tung Yen
- Department of Life Science and Institute of Zoology; National Taiwan University; Taipei Taiwan
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Liu X, Niu Y, Chen KC, Chen S. Rapid hemostatic and mild polyurethane-urea foam wound dressing for promoting wound healing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:289-297. [DOI: 10.1016/j.msec.2016.10.019] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 09/24/2016] [Accepted: 10/14/2016] [Indexed: 10/20/2022]
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Rapid Hydrophilization of Model Polyurethane/Urea (PURPEG) Polymer Scaffolds Using Oxygen Plasma Treatment. Polymers (Basel) 2016; 8:polym8040144. [PMID: 30979239 PMCID: PMC6431927 DOI: 10.3390/polym8040144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/22/2016] [Accepted: 04/08/2016] [Indexed: 11/25/2022] Open
Abstract
Polyurethane/urea copolymers based on poly(ethylene glycol) (PURPEG) were exposed to weakly ionized, highly reactive low-pressure oxygen plasma to improve their sorption kinetics. The plasma was sustained with an inductively coupled radiofrequency generator operating at various power levels in either E-mode (up to the forward power of 300 W) or H-mode (above 500 W). The treatments that used H-mode caused nearly instant thermal degradation of the polymer samples. The density of the charged particles in E-mode was on the order of 1016 m−3, which prevented material destruction upon plasma treatment, but the density of neutral O-atoms in the ground state was on the order of 1021 m−3. The evolution of plasma characteristics during sample treatment in E-mode was determined by optical emission spectroscopy; surface modifications were determined by water adsorption kinetics and X-ray photoelectron spectroscopy; and etching intensity was determined by residual gas analysis. The results showed moderate surface functionalization with hydroxyl and carboxyl/ester groups, weak etching at a rate of several nm/s, rather slow activation down to a water contact angle of 30° and an ability to rapidly absorb water.
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Li L, Liu X, Niu Y, Ye J, Huang S, Liu C, Xu K. Synthesis and wound healing of alternating block polyurethanes based on poly(lactic acid) (PLA) and poly(ethylene glycol) (PEG). J Biomed Mater Res B Appl Biomater 2016; 105:1200-1209. [DOI: 10.1002/jbm.b.33670] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 01/21/2016] [Accepted: 03/10/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Linjing Li
- Multidisciplinary Research Center, Shantou University; Shantou Guangdong 515063 China
| | - Xiangyu Liu
- Multidisciplinary Research Center, Shantou University; Shantou Guangdong 515063 China
| | - Yuqing Niu
- Multidisciplinary Research Center, Shantou University; Shantou Guangdong 515063 China
| | - Jianfu Ye
- Multidisciplinary Research Center, Shantou University; Shantou Guangdong 515063 China
| | - Shuiwen Huang
- Multidisciplinary Research Center, Shantou University; Shantou Guangdong 515063 China
| | - Chao Liu
- Aleo BME, Inc; University Park Pennsylvania 16802
| | - Kaitian Xu
- Multidisciplinary Research Center, Shantou University; Shantou Guangdong 515063 China
- Department of Materials Science and Engineering; Jinan University; Guangzhou 510632 China
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Shi S, Wu QY, Gu L, Zhang K, Yu H. Bio-based (co)polylactide-urethane networks with shape memory behavior at body temperature. RSC Adv 2016. [DOI: 10.1039/c6ra14488h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The novel bio-based polymer networks with shape memory behavior were synthesized from polylactide-based tetraols and hexamethylene diisocyanate trimer.
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Affiliation(s)
- Shuo Shi
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- P. R. China
- Key Laboratory of Marine Materials and Related Technologies
| | - Qing-Yun Wu
- Faculty of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo 315211
- P. R. China
| | - Lin Gu
- Key Laboratory of Marine Materials and Related Technologies
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
- P. R. China
| | - Kunyu Zhang
- Division of Biomedical Engineering
- Department of Mechanical and Automation Engineering
- The Chinese University of Hong Kong
- Hong Kong
- P. R. China
| | - Haibin Yu
- Key Laboratory of Marine Materials and Related Technologies
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo 315201
- P. R. China
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Agapova OI, Efimov AE, Moisenovich MM, Bogush VG, Agapov II. COMPARATIVE ANALYSIS OF THREE-DIMENSIONAL NANOSTRUCTURE OF POROUS BIOCOMPATIBLE SCAFFOLDS MADE OF RECOMBINANT SPIDROIN AND SILK FIBROIN FOR REGENERATIVE MEDICINE. ACTA ACUST UNITED AC 2015. [DOI: 10.15825/1995-1191-2015-2-37-44] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Aim.To perform a comparison of three-dimensional nanostructure of porous biocompatible scaffolds made of fibroinBombix moriand recombinant spidroin rS1/9.Materials and methods.Three-dimensional porous scaffolds were produced by salt leaching technique. The comparison of biological characteristics of the scaffolds shows that adhesion and proliferation of mouse fibroblastsin vitroon these two types of scaffolds do not differ significantly. Comparative experimentsin vivoshow that regeneration of bone tissue of rats is faster with implantation of recombinant spidroin scaffolds. Three-dimensional nanostructure of scaffolds and interconnectivity of nanopores were studied with scanning probe nanotomography (SPNT) to explain higher regenerative activity of spidroin-based scaffolds.Results.Significant differences were detected in the integral density and volume of pores: the integral density of nanopores detected on 2D AFM images is 46 μm–2 and calculated volume porosity is 24% in rS1/9-based scaffolds; in fibroin-based three-dimensional structures density of nanopores and calculated volume porosity were 2.4 μm–2 and 0.5%, respectively. Three-dimensional reconstruction system of nanopores and clusters of interconnected nanopores in rS1/9-based scaffolds showed that volume fraction of pores interconnected in percolation clusters is 35.3% of the total pore volume or 8.4% of the total scaffold volume.Conclusion.Scanning probe nanotomography method allows obtaining unique information about topology of micro – and nanopore systems of artificial biostructures. High regenerative activity of rS1/9-based scaffolds can be explained by higher nanoporosity of the scaffolds.
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Affiliation(s)
- O. I. Agapova
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation, Moscow
| | - A. E. Efimov
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation, Moscow
| | | | - V. G. Bogush
- The State Research Institute for Genetics and Selection of Industrial Microorganisms, Moscow
| | - I. I. Agapov
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation, Moscow
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