1
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Zeng Y, Song J, Li J, Yuan C. Influence of Isocyanate Structure on Recyclable Shape Memory Poly(thiourethane). MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114040. [PMID: 37297174 DOI: 10.3390/ma16114040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/21/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023]
Abstract
In this study, poly(thiourethane) (PTU) with different structures is synthesized by click chemistry from trimethylolpropane tris(3-mercaptopropionate) (S3) and different diisocyanates (hexamethylene diisocyanate, HDI, isophorone diisocyanate, IPDI and toluene diisocyanate, TDI). Quantitative analysis of the FTIR spectra reveals that the reaction rates between TDI and S3 are the most rapid, resulting from the combined influence of conjugation and spatial site hindrance. Moreover, the homogeneous cross-linked network of the synthesized PTUs facilitates better manageability of the shape memory effect. All three PTUs exhibit excellent shape memory properties (Rr and Rf are over 90%), and an increase in chain rigidity is observed to negatively impact the shape recovery rate and fix rate. Moreover, all three PTUs exhibit satisfactory reprocessability performance, and an increase in chain rigidity is accompanied by a greater decrease in shape memory and a smaller decrease in mechanical performance for recycled PTUs. Contact angle (<90°) and in vitro degradation results (13%/month for HDI-based PTU, 7.5%/month for IPDI-based PTU, and 8.5%/month for TDI-based PTU) indicate that PTUs can be used as long-term or medium-term biodegradable materials. The synthesized PTUs have a high potential for applications in smart response scenarios requiring specific glass transition temperatures, such as artificial muscles, soft robots, and sensors.
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Affiliation(s)
- Yu Zeng
- Department of Polymer Materials and Engineering, School of Materials Science and Engineering, Chang'an University, Xi'an 710018, China
| | - Jiale Song
- Department of Polymer Materials and Engineering, School of Materials Science and Engineering, Chang'an University, Xi'an 710018, China
| | - Jinfu Li
- Department of Polymer Materials and Engineering, School of Materials Science and Engineering, Chang'an University, Xi'an 710018, China
| | - Chi Yuan
- Department of Polymer Materials and Engineering, School of Materials Science and Engineering, Chang'an University, Xi'an 710018, China
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2
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Fatima T, Jolly R, Mushahid F, Khan N, Umar MS, Owais M, Shakir M. Combinatorial approach to fabricate silica doped polyvinyl alcohol/hydroxyapatite/carrageenan nanocomposite for bone regeneration applications. POLYM ADVAN TECHNOL 2023. [DOI: 10.1002/pat.6048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
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3
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Zhang W, Yu M, Cao Y, Zhuang Z, Zhang K, Chen D, Liu W, Yin J. An anti-bacterial porous shape memory self-adaptive stiffened polymer for alveolar bone regeneration after tooth extraction. Bioact Mater 2023; 21:450-463. [PMID: 36185742 PMCID: PMC9486049 DOI: 10.1016/j.bioactmat.2022.08.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/18/2022] Open
Affiliation(s)
- Weijun Zhang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Meilin Yu
- Department of Endodontics, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, 200001, China
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200001, China
| | - Yongqiang Cao
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Zihan Zhuang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
| | - Kunxi Zhang
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
- Corresponding author.
| | - Dong Chen
- Department of Endodontics, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, 200001, China
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200001, China
- Corresponding author. Department of Endodontics, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, 200001, China.
| | - Wenguang Liu
- School of Material Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
- Corresponding author.
| | - Jingbo Yin
- Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
- Corresponding author.
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4
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Four-Dimensional Printing and Shape Memory Materials in Bone Tissue Engineering. Int J Mol Sci 2023; 24:ijms24010814. [PMID: 36614258 PMCID: PMC9821376 DOI: 10.3390/ijms24010814] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/24/2022] [Accepted: 12/27/2022] [Indexed: 01/05/2023] Open
Abstract
The repair of severe bone defects is still a formidable clinical challenge, requiring the implantation of bone grafts or bone substitute materials. The development of three-dimensional (3D) bioprinting has received considerable attention in bone tissue engineering over the past decade. However, 3D printing has a limitation. It only takes into account the original form of the printed scaffold, which is inanimate and static, and is not suitable for dynamic organisms. With the emergence of stimuli-responsive materials, four-dimensional (4D) printing has become the next-generation solution for biological tissue engineering. It combines the concept of time with three-dimensional printing. Over time, 4D-printed scaffolds change their appearance or function in response to environmental stimuli (physical, chemical, and biological). In conclusion, 4D printing is the change of the fourth dimension (time) in 3D printing, which provides unprecedented potential for bone tissue repair. In this review, we will discuss the latest research on shape memory materials and 4D printing in bone tissue repair.
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5
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Zhao W, Yue C, Liu L, Liu Y, Leng J. Research Progress of Shape Memory Polymer and 4D Printing in Biomedical Application. Adv Healthc Mater 2022:e2201975. [PMID: 36520058 DOI: 10.1002/adhm.202201975] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 11/06/2022] [Indexed: 12/23/2022]
Abstract
As a kind of smart material, shape memory polymer (SMP) shows great application potential in the biomedical field. Compared with traditional metal-based medical devices, SMP-based devices have the following characteristics: 1) The adaptive ability allows the biomedical device to better match the surrounding tissue after being implanted into the body by minimally invasive implantation; 2) it has better biocompatibility and adjustable biodegradability; 3) mechanical properties can be regulated in a large range to better match with the surrounding tissue. 4D printing technology is a comprehensive technology based on smart materials and 3D printing, which has great application value in the biomedical field. 4D printing technology breaks through the technical bottleneck of personalized customization and provides a new opportunity for the further development of the biomedical field. This paper summarizes the application of SMP and 4D printing technology in the field of bone tissue scaffolds, tracheal scaffolds, and drug release, etc. Moreover, this paper analyzes the existing problems and prospects, hoping to provide a preliminary discussion and useful reference for the application of SMP in biomedical engineering.
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Affiliation(s)
- Wei Zhao
- Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), P.O. Box 301, No. 92 West Dazhi Street, Harbin, 150001, P. R. China
| | - Chengbin Yue
- Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), P.O. Box 301, No. 92 West Dazhi Street, Harbin, 150001, P. R. China
| | - Liwu Liu
- Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), P.O. Box 301, No. 92 West Dazhi Street, Harbin, 150001, P. R. China
| | - Yanju Liu
- Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), P.O. Box 301, No. 92 West Dazhi Street, Harbin, 150001, P. R. China
| | - Jinsong Leng
- Center for Composite Materials and Structures, Harbin Institute of Technology (HIT), P.O. Box 3011, No. 2 Yikuang Street, Harbin, 150080, P. R. China
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6
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Zhang Y, Li C, Zhang W, Deng J, Nie Y, Du X, Qin L, Lai Y. 3D-printed NIR-responsive shape memory polyurethane/magnesium scaffolds with tight-contact for robust bone regeneration. Bioact Mater 2022; 16:218-231. [PMID: 35415289 PMCID: PMC8965852 DOI: 10.1016/j.bioactmat.2021.12.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 12/13/2021] [Accepted: 12/26/2021] [Indexed: 01/01/2023] Open
Abstract
Patients with bone defects suffer from a high rate of disability and deformity. Poor contact of grafts with defective bones and insufficient osteogenic activities lead to increased loose risks and unsatisfied repair efficacy. Although self-expanding scaffolds were developed to enhance bone integration, the limitations on the high transition temperature and the unsatisfied bioactivity hindered greatly their clinical application. Herein, we report a near-infrared-responsive and tight-contacting scaffold that comprises of shape memory polyurethane (SMPU) as the thermal-responsive matrix and magnesium (Mg) as the photothermal and bioactive component, which fabricated by the low temperature rapid prototyping (LT-RP) 3D printing technology. As designed, due to synergistic effects of the components and the fabrication approach, the composite scaffold possesses a homogeneously porous structure, significantly improved mechanical properties and stable photothermal effects. The programmed scaffold can be heated to recover under near infrared irradiation in 60s. With 4 wt% Mg, the scaffold has the balanced shape fixity ratio of 93.6% and shape recovery ratio of 95.4%. The compressed composite scaffold could lift a 100 g weight under NIR light, which was more than 1700 times of its own weight. The results of the push-out tests and the finite element analysis (FEA) confirmed the tight-contacting ability of the SMPU/4 wt%Mg scaffold, which had a signficant enhancement compared to the scaffold without shape memory effects. Furthermore, The osteopromotive function of the scaffold has been demonstrated through a series of in vitro and in vivo studies. We envision this scaffold can be a clinically effective strategy for robust bone regeneration. A NIR-responsive shape memory composite scaffold fabricated by an innovative LT-RP 3D-printing technology. The SMPU/Mg scaffolds possess the porous structure, tight-contact and osteopromotive functions for robust bone regeneration. A new ‘3R’ process for bone repair: Recovered, Released, Repaired. Finite element analysis used for shape recovery process at the defective bone sites.
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Affiliation(s)
- Yuanchi Zhang
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Cairong Li
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Wei Zhang
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Junjie Deng
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yangyi Nie
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Xiangfu Du
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Ling Qin
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,Musculoskeletal Research Laboratory, Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong SAR, China.,CAS-HK Joint Lab of Biomaterials, Shenzhen, China
| | - Yuxiao Lai
- Centre for Translational Medicine Research & Development, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.,University of Chinese Academy of Sciences, Shenzhen, China.,Key Laboratory of Health Informatics, Chinese Academy of Sciences, Shenzhen, China.,CAS-HK Joint Lab of Biomaterials, Shenzhen, China
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7
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Wang N, Xie Y, Xi Z, Mi Z, Deng R, Liu X, Kang R, Liu X. Hope for bone regeneration: The versatility of iron oxide nanoparticles. Front Bioeng Biotechnol 2022; 10:937803. [PMID: 36091431 PMCID: PMC9452849 DOI: 10.3389/fbioe.2022.937803] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/02/2022] [Indexed: 11/18/2022] Open
Abstract
Although bone tissue has the ability to heal itself, beyond a certain point, bone defects cannot rebuild themselves, and the challenge is how to promote bone tissue regeneration. Iron oxide nanoparticles (IONPs) are a magnetic material because of their excellent properties, which enable them to play an active role in bone regeneration. This paper reviews the application of IONPs in bone tissue regeneration in recent years, and outlines the mechanisms of IONPs in bone tissue regeneration in detail based on the physicochemical properties, structural characteristics and safety of IONPs. In addition, a bibliometric approach has been used to analyze the hot spots and trends in the field in order to identify future directions. The results demonstrate that IONPs are increasingly being investigated in bone regeneration, from the initial use as magnetic resonance imaging (MRI) contrast agents to later drug delivery vehicles, cell labeling, and now in combination with stem cells (SCs) composite scaffolds. In conclusion, based on the current research and development trends, it is more inclined to be used in bone tissue engineering, scaffolds, and composite scaffolds.
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Affiliation(s)
- Nan Wang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yimin Xie
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zhipeng Xi
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zehua Mi
- Hospital for Skin Diseases, Institute of Dermatology Chinese Academy of Medical Sciences, Peking Union Medical College, Nanjing, China
| | - Rongrong Deng
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiyu Liu
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ran Kang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Department of Orthopedics, Nanjing Lishui Hospital of Traditional Chinese Medicine, Nanjing, China
| | - Xin Liu
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Department of Orthopedics, Nanjing Lishui Hospital of Traditional Chinese Medicine, Nanjing, China
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8
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Liu W, Li S, Wang B, Peng P, Gao C. Physiologically Responsive Polyurethanes for Tissue Repair and Regeneration. ADVANCED NANOBIOMED RESEARCH 2022. [DOI: 10.1002/anbr.202200061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Wenxing Liu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Shifen Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Beiduo Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Pai Peng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
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9
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Zhang M, Liu J, Zhu T, Le H, Wang X, Guo J, Liu G, Ding J. Functional Macromolecular Adhesives for Bone Fracture Healing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1-19. [PMID: 34939784 DOI: 10.1021/acsami.1c17434] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Compared with traditional internal fixation devices, bone adhesives are expected to exhibit remarkable advantages, such as improved fixation of comminuted fractures and maintained spatial location of fractured scattered bone pieces in treating bone injuries. In this review, different bone adhesives are summarized from the aspects of bone tissue engineering, and the applications of bone adhesives are emphasized. The concepts of "liquid scaffold" and "liquid plate" are proposed to summarize two different research directions of bone adhesives. Furthermore, significant advances of bone adhesives in recent years in mechanical strength, osseointegration, osteoconductivity, and osteoinductivity are discussed. We conclude this topic by providing perspectives on the state-of-the-art research progress and future development trends of bone adhesives. We hope this review will provide a comprehensive summary of bone adhesives and inspire more extensive and in-depth research on this subject.
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Affiliation(s)
- Mingran Zhang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
| | - Jiaxue Liu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
- Jilin Collaborative Innovation Center for Antibody Engineering, Jilin Medical University, 5 Jilin Street, Jilin 132000, People's Republic of China
| | - Tongtong Zhu
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
| | - Hanxiang Le
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
- Orthopaedic Medical Center, The Second Hospital of Jilin University, 218 Ziqiang Street, Changchun 130041, People's Republic of China
| | - Xukai Wang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of 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, 1023 Southern Shatai Road, Guangzhou 510515, People's Republic of China
| | - Guangyao Liu
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun 130033, People's Republic of China
| | - Jianxun Ding
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
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10
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Xu J, Wang X, Ruan H, Zhang X, Zhang Y, Yang Z, Wang Q, Wang T. Recent Advances in High-strength and High-toughness Polyurethanes Based on Supramolecular Interactions. Polym Chem 2022. [DOI: 10.1039/d2py00269h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent developments in supramolecular chemistry have generated increasing interest in supramolecular polymers and opened a window for the exploitation of various supramolecular polymeric materials and their multifunctional composites. High-performance polyurethanes,...
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11
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Lashkari R, Tabatabaei-Nezhad SA, Husein MM. Shape memory polyurethane as a wellbore strengthening material. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2021.11.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Bahraminasab M, Janmohammadi M, Arab S, Talebi A, Nooshabadi VT, Koohsarian P, Nourbakhsh MS. Bone Scaffolds: An Incorporation of Biomaterials, Cells, and Biofactors. ACS Biomater Sci Eng 2021; 7:5397-5431. [PMID: 34797061 DOI: 10.1021/acsbiomaterials.1c00920] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Large injuries to bones are still one of the most challenging musculoskeletal problems. Tissue engineering can combine stem cells, scaffold biomaterials, and biofactors to aid in resolving this complication. Therefore, this review aims to provide information on the recent advances made to utilize the potential of biomaterials for making bone scaffolds and the assisted stem cell therapy and use of biofactors for bone tissue engineering. The requirements and different types of biomaterials used for making scaffolds are reviewed. Furthermore, the importance of stem cells and biofactors (growth factors and extracellular vesicles) in bone regeneration and their use in bone scaffolds and the key findings are discussed. Lastly, some of the main obstacles in bone tissue engineering and future trends are highlighted.
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Affiliation(s)
- Marjan Bahraminasab
- Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan 3513138111, Iran.,Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan 3513138111, Iran
| | - Mahsa Janmohammadi
- Department of Biomedical Engineering, Faculty of New Sciences and Technologies, Semnan University, Semnan 3513119111, Iran
| | - Samaneh Arab
- Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan 3513138111, Iran.,Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan 3513138111, Iran
| | - Athar Talebi
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan 3513138111, Iran
| | - Vajihe Taghdiri Nooshabadi
- Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan 3513138111, Iran.,Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan 3513138111, Iran
| | - Parisa Koohsarian
- Department of Biochemistry and Hematology, School of Medicine, Semnan University of Medical Sciences, Semnan 3513138111, Iran
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13
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Jampilek J, Placha D. Advances in Use of Nanomaterials for Musculoskeletal Regeneration. Pharmaceutics 2021; 13:1994. [PMID: 34959276 PMCID: PMC8703496 DOI: 10.3390/pharmaceutics13121994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/18/2021] [Accepted: 11/22/2021] [Indexed: 12/24/2022] Open
Abstract
Since the worldwide incidence of bone disorders and cartilage damage has been increasing and traditional therapy has reached its limits, nanomaterials can provide a new strategy in the regeneration of bones and cartilage. The nanoscale modifies the properties of materials, and many of the recently prepared nanocomposites can be used in tissue engineering as scaffolds for the development of biomimetic materials involved in the repair and healing of damaged tissues and organs. In addition, some nanomaterials represent a noteworthy alternative for treatment and alleviating inflammation or infections caused by microbial pathogens. On the other hand, some nanomaterials induce inflammation processes, especially by the generation of reactive oxygen species. Therefore, it is necessary to know and understand their effects in living systems and use surface modifications to prevent these negative effects. This contribution is focused on nanostructured scaffolds, providing a closer structural support approximation to native tissue architecture for cells and regulating cell proliferation, differentiation, and migration, which results in cartilage and bone healing and regeneration.
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Affiliation(s)
- Josef Jampilek
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, 842 15 Bratislava, Slovakia
| | - Daniela Placha
- Nanotechnology Centre, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 33 Ostrava-Poruba, Czech Republic
- Centre ENET, CEET, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 33 Ostrava-Poruba, Czech Republic
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14
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Breul K, Stengelin E, Urschbach M, Mondeshki M, Wüst L, Sirleaf J, Seitel S, Emt T, Pschierer S, Besenius P, Seiffert S. Cell Adhesion on UV-Crosslinked Polyurethane Gels with Adjustable Mechanical Strength and Thermoresponsiveness. Macromol Rapid Commun 2021; 42:e2100505. [PMID: 34562294 DOI: 10.1002/marc.202100505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/17/2021] [Indexed: 12/22/2022]
Abstract
Temperature-responsive polyurethane (PU) hydrogels represent a versatile material platform for modern tissue engineering and biomedical applications. However, besides intrinsic advantages such as high mechanical strength and a hydrolysable backbone composition, plain PU materials are generally lacking bio-adhesive properties. To overcome this shortcoming, the authors focus on the synthesis of thermoresponsive PU hydrogels with variable mechanical and cell adhesive properties obtained from linear precursor PUs based on poly(ethylene glycol)s (pEG) with different molar masses, isophorone diisocyanate, and a dimerizable dimethylmaleimide (DMMI)-diol. The cloud point temperatures of the dilute, aqueous PU solutions depend linearly on the amphiphilic balance. Rheological gelation experiments under UV-irradiation reveal the dependence of the gelation time on photosensitizer concentration and light intensity, while the finally obtained gel strength is determined by the polymer concentration and spacing of the crosslinks. The swelling ratios of these soft hydrogels show significant changes between 5 and 40 °C whereby the extent of this switch increases with the hydrophobicity of the precursor. Moreover, it is shown that the incorporation of a low amount of catechol groups into the networks through the DMMI dimerization reaction leads to strongly improved cell adhesive properties without significantly weakening the gels.
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Affiliation(s)
- Katharina Breul
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Elena Stengelin
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Moritz Urschbach
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Mihail Mondeshki
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Laura Wüst
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Jason Sirleaf
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Sebastian Seitel
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Theresa Emt
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Sarah Pschierer
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Pol Besenius
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
| | - Sebastian Seiffert
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany
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15
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Bei HP, Hung PM, Yeung HL, Wang S, Zhao X. Bone-a-Petite: Engineering Exosomes towards Bone, Osteochondral, and Cartilage Repair. SMALL 2021; 17:e2101741. [PMID: 34288410 DOI: 10.1002/smll.202101741] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/18/2021] [Indexed: 02/05/2023]
Abstract
Recovery from bone, osteochondral, and cartilage injuries/diseases has been burdensome owing to the damaged vasculature of large defects and/or avascular nature of cartilage leading to a lack of nutrients and supplying cells. However, traditional means of treatment such as microfractures and cell-based therapy only display limited efficacy due to the inability to ensure cell survival and potential aggravation of surrounding tissues. Exosomes have recently emerged as a powerful tool for this tissue repair with its complex content of transcription factors, proteins, and targeting ligands, as well as its unique ability to home in on target cells thanks to its phospholipidic nature. They are engineered to serve specialized applications including enhancing repair, anti-inflammation, regulating homeostasis, etc. via means of physical, chemical, and biological modulations in its deriving cell culture environments. This review focuses on the engineering means to functionalize exosomes for bone, osteochondral, and cartilage regeneration, with an emphasis on conditions such as osteoarthritis, osteoporosis, and osteonecrosis. Finally, future implications for exosome development will be given alongside its potential combination with other strategies to improve its therapeutic efficacy in the osteochondral niche.
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Affiliation(s)
- Ho Pan Bei
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
| | - Pak Ming Hung
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
| | - Hau Lam Yeung
- Li Ka Shing Faculty of Medicine, The University of Hong Kong, 21 Sassoon Rd, Pokfulam, Hong Kong SAR, 999077, China
| | - Shuqi Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610065, China.,Clinical Research Center for Respiratory Disease, West China Hospital, Sichuan University, Chengdu, 610065, China.,Institute for Advanced Study, Chengdu University, Chengdu, 610106, P. R. China
| | - Xin Zhao
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, 999077, China
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16
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Rezaei H, Shahrezaee M, Jalali Monfared M, Fathi Karkan S, Ghafelehbashi R. Simvastatin-loaded graphene oxide embedded in polycaprolactone-polyurethane nanofibers for bone tissue engineering applications. JOURNAL OF POLYMER ENGINEERING 2021. [DOI: 10.1515/polyeng-2020-0301] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
Here, the role of simvastatin-loaded graphene oxide embedded in polyurethane-polycaprolactone nanofibers for bone tissue engineering has been investigated. The scaffolds were physicochemically and mechanically characterized, and obtained polymeric composites were used as MG-63 cell culture scaffolds. The addition of graphene oxide-simvastatin to nanofibers generates a homogeneous and uniform microstructure as well as a reduction in fiber diameter. Results of water-scaffolds interaction indicated higher hydrophilicity and absorption capacity as a function of graphene oxide addition. Scaffolds’ mechanical properties and physical stability improved after the addition of graphene oxide. Inducing bioactivity after the addition of simvastatin-loaded graphene oxide terminated its capability for hard tissue engineering application, evidenced by microscopy images and phase characterization. Nanofibrous scaffolds could act as a sustained drug carrier. Using the optimal concentration of graphene oxide-simvastatin is necessary to avoid toxic effects on tissue. Results show that the scaffolds are biocompatible to the MG-63 cell and support alkaline phosphatase activity, illustrating their potential use in bone tissue engineering. Briefly, graphene-simvastatin-incorporated in polymeric nanofibers was developed to increase bioactive components’ synergistic effect to induce more bioactivity and improve physical and mechanical properties as well as in vitro interactions for better results in bone repair.
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Affiliation(s)
- Hessam Rezaei
- Department of Orthopedic Surgery , School of Medicine, AJA University of Medical Sciences , Tehran , Iran
- Department of Biomedical Engineering , Science and Research Branch, Islamic Azad University , Tehran , Iran
| | - Mostafa Shahrezaee
- Department of Orthopedic Surgery , School of Medicine, AJA University of Medical Sciences , Tehran , Iran
| | - Marziyeh Jalali Monfared
- Department of Biomaterials and Medicinal Chemistry Research Center, AJA University of Medical Sciences , Tehran , Iran
| | - Sonia Fathi Karkan
- Department of Medical Nanotechnology, Faculty of Advanced Medical Science, Tabriz University of Medical Sciences , Tabriz , Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
- Student Research Committee , Tabriz University of Medical Sciences , Tabriz , Iran
| | - Robabehbeygom Ghafelehbashi
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences , Tehran , Iran
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17
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Zhang Y, Hu J. Robust Effects of Graphene Oxide on Polyurethane/Tourmaline Nanocomposite Fiber. Polymers (Basel) 2020; 13:E16. [PMID: 33374588 PMCID: PMC7793061 DOI: 10.3390/polym13010016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 11/16/2022] Open
Abstract
The use of energy therapy including tourmaline/negative ions has gained huge popularity due to their long-standing historical evidence in improving human health and the technology development. However, the limitations of tourmaline based polyurethane fibers including the unsatisfied mechanical properties and negative ions releasing performances hind their further applications for wearable energy therapy. In this study, graphene oxide was modified within the polyurethane/tourmaline nanocomposite and then the wet-spinning method was used to prepare the fibers. As expected, the results proved that polyurethane/tourmaline/graphene oxide fiber had enhanced Young's modulus (8.4 MPa) and tensile stain at break (335%). In addition, the number of released negative ions from polyurethane/tourmaline/graphene oxide fiber was significantly improved 17 times and 1.6 times more than that of neat polyurethane fiber and polyurethane/tourmaline fiber, respectively. Moreover, the releasing number of negative ions was significantly decreased after being applying voltage. We envision that the proposed polyurethane/tourmaline/graphene oxide fiber will provide valuable insights into the development of the wearable energy products.
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Affiliation(s)
- Yuanchi Zhang
- Centre for Translational Medicine Research & Development, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
| | - Jinlian Hu
- Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China
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18
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Zhang Y, Hu J, Xie R, Yang Y, Cao J, Tu Y, Zhang Y, Qin T, Zhao X. A programmable, fast-fixing, osteo-regenerative, biomechanically robust bone screw. Acta Biomater 2020; 103:293-305. [PMID: 31857258 DOI: 10.1016/j.actbio.2019.12.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 12/08/2019] [Accepted: 12/13/2019] [Indexed: 02/08/2023]
Abstract
The use of a screw for repairing defected bones is limited by the dilemma between stiffness, bioactivity and internal fixation ability in current products. For polymer bone screw, it is difficult to achieve the bone stiffness and osteo-induction. Polymer composites may enhance bioactivity and mechanical properties but sacrifice the shape memory properties enormously. Herein, we fabricated a programmable bone screw which is composed of shape memory polyurethane, hydroxyapatite and arginylglycylaspartic acid to resolve the above problem. This composite has significantly improved mechanical and shape-memory properties with a modulus of 250 MPa, a shape fixity ratio of ~90% and a shape recovery ratio of ~96%. Moreover, shape fixity and recovery ratios of the produced SMPC screw in the simulative biological condition were respectively ~80% and ~82%. The produced screw could quickly recover to its original shape in vitro within 20 s leading to easy internal fixation. Additionally, the composite could support mesenchymal stem cell survival, proliferation and osteogenic differentiation in vitro tests. It also promoted tissue growth and showed beneficial mechanical compatibility after implantation into a rabbit femoral intracondyle for 12 weeks with little inflammation. Such bone screw exhibited a fast-fixing, tightened fitting, enhanced supporting and boosted bioactivity simultaneously in the defective bone, which provides a solution to the long-standing problem for bone repairing. We envision that our composite material will provide valuable insights into the development of a new generation of bone screws with good fixation and osteogenic properties. STATEMENT OF SIGNIFICANCE: The main obstacles to a wider use of a bone screw are unsatisfied stiffness, inflammatory response and screw loosening issues. Herein, we report a programmable screw with mechanically robust, bioactive and fast-fixing performances. The shape memory polymer composite takes advantage of the component in the natural bone and possesses a stable bush-like structure inside through the covalent bonding, and thus achieve significantly improved mechanical and memory properties. Based on its shape memory effect, the produced screw was proved to offer a recovery force to surroundings and promote the bone regeneration effectively. Therefore, the composite realizes our expectations on functions through structure design and paves a practical and effective way for the development of a new generation of bone screws.
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19
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Yu P, Guo XS, Bao RY, Liu ZY, Yang MB, Yang W. Photo-Driven Self-Healing of Arbitrary Nondestructive Damage in Polyethylene-Based Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2020; 12:1650-1657. [PMID: 31822066 DOI: 10.1021/acsami.9b19440] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Polymer products with precise shape recovery behavior are highly desired for practical applications owing to excellent processability and mechanical properties compared with metallic or inorganic materials. Shape memory polymers (SMPs) provide a solution for this end, but the design and scalable fabrication of photothermal controllable SMPs with accurate, rapid, and repeatable recovery behaviors are still great challenges. In this work, polyurethane/sulfonated carbon nanotube (PU/S-CNT) composite particles are introduced into a cross-linked high-density polyethylene (HDPE) as a functional dispersed phase to realize photo-driven fast shape recovery in cheap polymer composite materials. It is found that microcracks can be induced by the PU/S-CNT composite particles during deformation, generating a particular microparticle in a microcrack (MC-MP) structure. The MC-MP microstructure significantly improves the photothermal conversion efficiency, thereby accelerating the photo-driven shape self-healing of arbitrary nondestructive material damage. It is also found that proper cross-linking of the matrix, HDPE, greatly improves the recovery performance of the materials. This strategy based on the MC-MP microstructure and cross-linked matrix is also instructive for designing new SMPs using other polymer materials.
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Affiliation(s)
- Peng Yu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Xiao-Shuai Guo
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Zheng-Ying Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
| | - Wei Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China
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20
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Zhang Y, Hu J. Isocyanate Modified GO Shape-Memory Polyurethane Composite. Polymers (Basel) 2020; 12:E118. [PMID: 31948033 PMCID: PMC7022938 DOI: 10.3390/polym12010118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/16/2019] [Accepted: 12/21/2019] [Indexed: 11/24/2022] Open
Abstract
Shape-memory composites have benefits for minimally invasive surgery, but their wider applications for bone repair are hindered by conflicts between the mechanical and memory performances, especially at load-bearing locations. In this study, we fabricated a graphene oxide shape-memory polyurethane composite through the chemical combination of graphene oxide and isocyanate, in order to realize satisfactory mechanical and shape-memory effects. As desired, a modulus of ~339 MPa and a shape recovery ratio of 98% were achieved, respectively, in the composite. In addition, finite element analysis demonstrated that, after being implanted in a defective bone through a minimally invasive treatment, where the highest stress was distributed at the implant-bone interface, this composite could offer a generated force during the recovery process. Furthermore, we also discuss the origins of the improved mechanical and memory properties of the composites, which arise from increased net-points and the stable molecular structure inside. Therefore, with its superior structure and properties, we envision that this shape-memory composite can provide new insights toward the practical application of shape-memory polymers and composites in the field of bone repair.
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Affiliation(s)
| | - Jinlian Hu
- Institute of Textiles and Clothing, Hong Kong Polytechnic University, Hung Hom, Hong Kong 999077, China;
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21
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Li X, Liu W, Li Y, Lan W, Zhao D, Wu H, Feng Y, He X, Li Z, Li J, Luo F, Tan H. Mechanically robust enzymatically degradable shape memory polyurethane urea with a rapid recovery response induced by NIR. J Mater Chem B 2020; 8:5117-5130. [DOI: 10.1039/d0tb00798f] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
NIR-light triggered shape memory process involving PU/gold-nanorod composites is shown.
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22
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Shape Memory Polyurethane and its Composites for Various Applications. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9214694] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The inherent capability to deform and reform in a predefined environment is a unique property existing in shape memory polyurethane. The intrinsic shape memory ability of the polyurethane is due to the presence of macro domains of soft and hard segments in its bulk, which make this material a potential candidate for several applications. This review is focused on manifesting the applicability of shape memory polyurethane and its composites/blends in various domains, especially to human health such as shielding of electromagnetic interference, medical bandage development, bone tissue engineering, self-healing, implants development, etc. A coherent literature review highlighting the prospects of shape memory polyurethane in versatile applications has been presented.
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23
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Sarabiyan Nejad S, Rezaei M, Bagheri M. Polyurethane/Nitrogen-Doped Graphene Quantum Dot (N-GQD) nanocomposites: synthesis, characterization, thermal, mechanical and shape memory properties. POLYM-PLAST TECH MAT 2019. [DOI: 10.1080/25740881.2019.1647243] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sanaz Sarabiyan Nejad
- Chemistry Department, Science Faculty, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Mostafa Rezaei
- Institute of Polymeric Materials, Polymer Engineering Department, Sahand University of Technology, Tabriz, Iran
| | - Massoumeh Bagheri
- Chemistry Department, Science Faculty, Azarbaijan Shahid Madani University, Tabriz, Iran
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24
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Castillo-Cruz O, Avilés F, Vargas-Coronado R, Cauich-Rodríguez JV, Chan-Chan LH, Sessini V, Peponi L. Mechanical properties of l-lysine based segmented polyurethane vascular grafts and their shape memory potential. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:887-895. [PMID: 31147060 DOI: 10.1016/j.msec.2019.04.073] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 04/06/2019] [Accepted: 04/23/2019] [Indexed: 12/31/2022]
Abstract
Segmented polyurethanes based on polycaprolactone, 4,4 (metylene-bis-cyclohexyl) isocyanate, and l-lysine were synthesized, manufactured as small vascular grafts and characterized according to ISO 7198 standard for cardiovascular implants-tubular vascular prosthesis. In terms of mechanical properties, the newly synthesized polyurethane films exhibited lower secant modulus than Tecoflex™ SG 80A, a well-known medical grade polyurethane. Similarly, when tested as grafts, the l-lysine-based polyurethane exhibited lower longitudinal failure load (11.5 N vs. 116 N), lower circumferential failure load per unit length (5.67 N/mm vs. 14.0 N/mm) and lower suture forces for both nylon (13.3 N vs. 24.0 N) and silk (14.0 N vs. 19.3 N) when compared to Tecoflex™ SG 80A grafts. l-Lysine-based graft exhibited a burst strength of 3620 mmHg (482.6 kPa) and a compliance of 0.16%/mmHg. The cell adhesion was demonstrated with NIH/3T3 fibroblasts where cell adhesion was observed on both films and grafts, while cell alignment was observed only on the grafts. The mechanical properties of this polyurethane and the possibility of strain-induced PCL crystals as the switching phase for shape memory materials, allowed a strain recovery ratio and a strain fixity ratio with values higher than 95% and 90%, respectively, with a repeatability of the shape-memory properties up to 4 thermo-mechanical cycles. Overall, the properties of lysine-based polyurethanes are suitable for large diameter vascular grafts where cell alignment can be controlled by their shape memory potential.
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Affiliation(s)
- O Castillo-Cruz
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico
| | - F Avilés
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico
| | - R Vargas-Coronado
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico
| | - J V Cauich-Rodríguez
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales, Calle 43 # 130 x 32 y 34, Col. Chuburná de Hidalgo, 97205 Mérida, Yucatán, Mexico.
| | - L H Chan-Chan
- CONACyT-Universidad de Sonora, Blvd. Luis Encinas y Rosales, Centro, C.P. 83000, Hermosillo, Sonora, Mexico
| | - V Sessini
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006 Madrid, Spain
| | - L Peponi
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006 Madrid, Spain
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