1
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Liu J, Li T, Zhang H, Zhao W, Qu L, Chen S, Wu S. Electrospun strong, bioactive, and bioabsorbable silk fibroin/poly (L-lactic-acid) nanoyarns for constructing advanced nanotextile tissue scaffolds. Mater Today Bio 2022; 14:100243. [PMID: 35372816 PMCID: PMC8968670 DOI: 10.1016/j.mtbio.2022.100243] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/10/2022] [Accepted: 03/12/2022] [Indexed: 12/18/2022] Open
Abstract
Bio-textiles have aroused attractive attentions in tissue engineering and regenerative medicine, and developing robust, bio-absorbable, and extracellular matrix (ECM) fibril-mimicking nanofibrous textiles is urgently required for the renewal of existing microfibrous textile-based scaffolds and grafts. In this study, an integrated electrospinning system consisting of one nanoyarn-forming unit and one hot stretching unit is reported to fabricate silk fibroin (SF)/poly (L-lactic-acid) (PLLA) nanofibrous yarns (nanoyarns). The hot stretching process is demonstrated to significantly improve the fiber alignment, crystallinity, and mechanical properties of SF/PLLA nanoyarns, compared to the unstretched controls. For instance, the fiber alignment degree of hot stretched 50/50 SF/PLLA nanoyarn has increased by 25%, and the failure strength has increased by 246.5%, compared with the corresponding un-stretched control. Increasing the SF/PLLA mass ratio is found to significantly decrease the crystallinity and mechanical properties, but notably increase the degradation rate and surface hydrophilicity of SF/PLLA nanoyarns. Different SF/PLLA nanoyarns are further meticulously interwoven with warp and weft directions to obtain several nanofibrous woven textiles. The results from in vitro cell characterization and in vivo subcutaneous implantation show that increasing the SF/PLLA mass ratio significantly improves the biological properties and effectively reduces the inflammatory response of nanoyarn-constructed textiles. Overall, this study demonstrates that our SF/PLLA nanoyarns with controllable physical, mechanical and biological performances are fantastic candidates for the designing and development of advanced nanoarchitectured textile tissue scaffolds.
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Affiliation(s)
- Jiao Liu
- College of Textiles & Clothing, Qingdao University, Qingdao, China
| | - Tao Li
- College of Textiles & Clothing, Qingdao University, Qingdao, China
| | - Hao Zhang
- Qingdao University Medical College, Qingdao University, Qingdao, China
| | - Wenwen Zhao
- Qingdao University Medical College, Qingdao University, Qingdao, China
| | - Lijun Qu
- College of Textiles & Clothing, Qingdao University, Qingdao, China
- Research Center for Intelligent and Wearable Technology, Qingdao University, Qingdao, China
| | - Shaojuan Chen
- College of Textiles & Clothing, Qingdao University, Qingdao, China
| | - Shaohua Wu
- College of Textiles & Clothing, Qingdao University, Qingdao, China
- Research Center for Intelligent and Wearable Technology, Qingdao University, Qingdao, China
- Corresponding author. College of Textiles & Clothing, Qingdao University, Qingdao, China.
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2
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Zhao G, Liu Q, Tian Y, Liu J, Cheng J, Ni Z. Evaluation of mechanical properties of poly(
L
‐lactic acid) braided stents with axial stiffeners. J Appl Polym Sci 2022. [DOI: 10.1002/app.52242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gutian Zhao
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Qingwei Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Yuan Tian
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Jinbo Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Jie Cheng
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Zhonghua Ni
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
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3
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Yuan Z, Liu Y, Ye L, Coates P, Caton-Rose F, Zhao X. Structure Evolution of Highly Oriented Poly(lactic acid)-b-poly(lactide-co-caprolactone) Block Copolymer during Two-Stage Solid Phase Hot Drawing. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Zun Yuan
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Yalong Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Lin Ye
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Phil Coates
- School of Engineering, Design and Technology, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Fin Caton-Rose
- School of Engineering, Design and Technology, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Xiaowen Zhao
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
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4
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Wu S, Liu J, Cai J, Zhao J, Duan B, Chen S. Combining electrospinning with hot drawing process to fabricate high performance poly (L-lactic acid) nanofiber yarns for advanced nanostructured bio-textiles. Biofabrication 2021; 13. [PMID: 34450602 DOI: 10.1088/1758-5090/ac2209] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/27/2021] [Indexed: 11/11/2022]
Abstract
Fiber constructed yarns are the elementary building blocks for the generation of implantable biotextiles, and there are always needs for designing and developing new types of yarns to improve the properties of biotextile implants. In the present study, we aim to develop novel nanofiber yarns (NYs) by combining nanostructure that more closely mimic the extracellular matrix fibrils of native tissues with biodegradability, strong mechanical properties and great textile processibility. A novel electrospinning system which integrates yarn formation with hot drawing process was developed to fabricate poly(L-lactic acid) (PLLA) NYs. Compared to the PLLA NYs without hot drawing, the thermally drawn PLLA NYs presented superbly-orientated fibrous structure and notably enhanced crystallinity. Importantly, they possessed admirable mechanical performances, which matched and even exceeded the commercial PLLA microfiber yarns (MYs). The thermally drawn PLLA NYs were also demonstrated to notably promote the adhesion, alignment, proliferation, and tenogenic differentiation of human adipose derived mesenchymal stem cells (hADMSCs) compared to the PLLA NYs without hot drawing. The thermally drawn PLLA NYs were further processed into various nanofibrous tissue scaffolds with defined structures and adjustable mechanical and biological properties using textile braiding and weaving technologies, demonstrating the feasibility and versatility of thermally drawn PLLA NYs for textile-forming utilization. The hADMSCs cultured on PLLA NY-based textiles presented enhanced attachment and proliferation capacities than those cultured on PLLA MY-based textiles. This work presents a facile technique to manufacture high performance PLLA NYs, which opens up opportunities to generate advanced nanostructured biotextiles for surgical implant applications.
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Affiliation(s)
- Shaohua Wu
- College of Textiles & Clothing, Qingdao University, Qingdao, People's Republic of China
| | - Jiao Liu
- College of Textiles & Clothing, Qingdao University, Qingdao, People's Republic of China
| | - Jiangyu Cai
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Jinzhong Zhao
- Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, People's Republic of China
| | - Bin Duan
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America.,Department of Surgery, College of Medicine, University of Nebraska Medical Center, Omaha, NE, United States of America.,Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, United States of America
| | - Shaojuan Chen
- College of Textiles & Clothing, Qingdao University, Qingdao, People's Republic of China
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5
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Im SH, Im DH, Park SJ, Chung JJ, Jung Y, Kim SH. Stereocomplex Polylactide for Drug Delivery and Biomedical Applications: A Review. Molecules 2021; 26:2846. [PMID: 34064789 PMCID: PMC8150862 DOI: 10.3390/molecules26102846] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 02/06/2023] Open
Abstract
Polylactide (PLA) is among the most common biodegradable polymers, with applications in various fields, such as renewable and biomedical industries. PLA features poly(D-lactic acid) (PDLA) and poly(L-lactic acid) (PLLA) enantiomers, which form stereocomplex crystals through racemic blending. PLA emerged as a promising material owing to its sustainable, eco-friendly, and fully biodegradable properties. Nevertheless, PLA still has a low applicability for drug delivery as a carrier and scaffold. Stereocomplex PLA (sc-PLA) exhibits substantially improved mechanical and physical strength compared to the homopolymer, overcoming these limitations. Recently, numerous studies have reported the use of sc-PLA as a drug carrier through encapsulation of various drugs, proteins, and secondary molecules by various processes including micelle formation, self-assembly, emulsion, and inkjet printing. However, concerns such as low loading capacity, weak stability of hydrophilic contents, and non-sustainable release behavior remain. This review focuses on various strategies to overcome the current challenges of sc-PLA in drug delivery systems and biomedical applications in three critical fields, namely anti-cancer therapy, tissue engineering, and anti-microbial activity. Furthermore, the excellent potential of sc-PLA as a next-generation polymeric material is discussed.
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Affiliation(s)
- Seung Hyuk Im
- NBIT, KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.H.I.); (S.J.P.)
- enoughU Inc., 114 Goryeodae-ro, Seongbuk-gu, Seoul 02856, Korea
| | - Dam Hyeok Im
- Department of Mechanical Engineering, Graduate School, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Korea;
| | - Su Jeong Park
- NBIT, KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.H.I.); (S.J.P.)
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (J.J.C.); (Y.J.)
| | - Justin Jihong Chung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (J.J.C.); (Y.J.)
| | - Youngmee Jung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (J.J.C.); (Y.J.)
- School of Electrical and Electronic Engineering, Yonsei-KIST Convergence Research Institute, Yonsei University, Seoul 03722, Korea
| | - Soo Hyun Kim
- NBIT, KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea; (S.H.I.); (S.J.P.)
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea; (J.J.C.); (Y.J.)
- Korea Institute of Science and Technology (KIST) Europe, Campus E 7.1, 66123 Saarbrueken, Germany
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6
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Tian Y, Liu M, Liu W, Cheng J, Wu G, Han T, Zhang Y, Zhao G, Ni Z. Effects of annealing temperature on both radial supporting performance and axial flexibility of poly(L‐lactic acid) braided stents. J Appl Polym Sci 2021. [DOI: 10.1002/app.50517] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yuan Tian
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Muqing Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Wentao Liu
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Jie Cheng
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Gensheng Wu
- School of Mechanical and Electronic Engineering Nanjing Forestry University Nanjing China
| | - Ting Han
- Department of Thermal Analysis Instrument Mettler‐Toledo Company Shanghai China
| | - Yi Zhang
- Center of Interventional Radiology & Vascular Surgery, Department of Radiology, Zhongda Hospital, Medical School Southeast University Nanjing China
| | - Gutian Zhao
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
| | - Zhonghua Ni
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments Southeast University Nanjing China
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7
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Tian Y, Zhang J, Cheng J, Wu G, Zhang Y, Ni Z, Zhao G. A poly(L‐lactic acid) monofilament with high mechanical properties for application in biodegradable biliary stents. J Appl Polym Sci 2021. [DOI: 10.1002/app.49656] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuan Tian
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments, Southeast University Nanjing China
| | - Jing Zhang
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments, Southeast University Nanjing China
| | - Jie Cheng
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments, Southeast University Nanjing China
| | - Gensheng Wu
- School of Mechanical and Electronic Engineering, Nanjing Forestry University Nanjing China
| | - Yi Zhang
- Center of Interventional Radiology & Vascular Surgery, Department of Radiology Zhongda Hospital, Medical School, Southeast University Nanjing China
| | - Zhonghua Ni
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments, Southeast University Nanjing China
| | - Gutian Zhao
- School of Mechanical Engineering, Jiangsu Key Laboratory for Design and Manufacture of Micro‐Nano Biomedical Instruments, Southeast University Nanjing China
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8
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Zhang X, Wang Z, Zhang YS, Yan S, Hou C, Gong Y, Qiu J, Chen M, Li Q. Studying endothelial cell shedding and orientation using adaptive perfusion-culture in a microfluidic vascular chip. Biotechnol Bioeng 2020; 118:963-978. [PMID: 33200409 DOI: 10.1002/bit.27626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 09/30/2020] [Accepted: 11/05/2020] [Indexed: 11/06/2022]
Abstract
Most tissue-engineered blood vessels are endothelialized by static cultures in vitro. However, it has not been clear whether endothelial cell-shedding and local damage may occur in an endothelial layer formed by static cultures under the effect of blood flow shear postimplantation. In this study, we report a bionic and cost-effective vascular chip platform, and proved that a static culture of endothelialized tissue-engineered blood vessels had the problem of a large number of endothelial cells falling off under the condition imitating the human arterial blood flow, and we addressed this challenge by regulating the flow field in a vascular chip. Electrospun membranes made of highly oriented or randomly distributed poly(ε-caprolactone) fibers were used as the vascular scaffolds, on which endothelial cells proliferated well and eventually formed dense intima layers. We noted that the monolayers gradually adapted to the artery-like microenvironment through the regulation of chip flow field, which also revealed improved cellular orientations. In conclusion, we have proposed a vascular chip with adaptive flow patterns to gradually accommodate the statically cultured vascular endothelia to the shear environment of arterial flow field and enhanced the orientation of the endothelial cells. This strategy may find numerous potential applications such as screening of vascular engineering biomaterials and maturation parameters, studying of vascular biology and pathology, and construction of vessel-on-a-chip models for drug analysis, among others.
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Affiliation(s)
- Xiang Zhang
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, China.,Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts, USA.,National Center for International Joint Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou, China.,Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou, China
| | - Zhenxing Wang
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, China.,National Center for International Joint Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou, China.,Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou, China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts, USA
| | - Shujie Yan
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, China.,National Center for International Joint Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou, China.,Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou, China
| | - Chuanyu Hou
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, China.,National Center for International Joint Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou, China.,Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou, China
| | - Youping Gong
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, China
| | - Jingjiang Qiu
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, China
| | - Mo Chen
- Obstetrics and Gynecology Hospital, Fudan University, Shanghai, China
| | - Qian Li
- School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, China.,National Center for International Joint Research of Micro-Nano Molding Technology, Zhengzhou University, Zhengzhou, China.,Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou, China
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9
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Han G, Bedair TM, Kim DH, Park KH, Park W, Han DK. Improved mechanical and biological properties of biodegradable thinner poly(l-lactic acid) tubes by bi-directional drawing. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.06.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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10
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11
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Aligned electrospun cellulose scaffolds coated with rhBMP-2 for both in vitro and in vivo bone tissue engineering. Carbohydr Polym 2019; 213:27-38. [DOI: 10.1016/j.carbpol.2019.02.038] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 02/12/2019] [Accepted: 02/12/2019] [Indexed: 12/13/2022]
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12
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Li Q, Li C, Wang F, Hu S, Wang L. [Structural control and characterization of hierarchically structured fibrous scaffolds]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2019; 33:479-485. [PMID: 30983199 PMCID: PMC8337179 DOI: 10.7507/1002-1892.201808128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 02/25/2019] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To prepare hierarchically structured fibrous scaffolds with different morphologies, and to explore the additional dimensionality for tuning the physicochemical properties of the scaffolds and the effect of their hemocompatibility and cytocompatibility. METHODS Electrospinning poly (e-caprolactone) (PCL)/polyvinylpyrrolidone (PVP) bicomponent fibers (PCL∶PVP mass ratios were 8∶2 and 5∶5 respectively), and the surface porous fibrous scaffolds were prepared by extracting PVP components. The scaffolds were labeled PCL-P8 and PCL-P5 respectively according to the mass ratio of polymer. In addition, shish-kebab (SK) structured scaffolds with different kebab sizes were created by solution incubation method, which use electrospun PCL fibers as shish while PCL chains in solution crystallizes on the fiber surface. The PCL fibrous scaffolds with smooth surface was established as control group. The hierarchically structured fibrous scaffolds were characterized by field emission scanning electron microspore, water contact angle tests, and differential scanning calorimeter (DSC) experiments. The venous blood of New Zealand white rabbits was taken and hemolysis and coagulation tests were used to characterize the blood compatibility of the scaffolds. The proliferation of the pig iliac artery endothelial cell (PIEC) on the scaffolds was detected by cell counting kit 8 (CCK-8) method, and the biocompatibility of the scaffolds was evaluated. RESULTS Field emission scanning electron microscopy showed that porous morphology appeared on the surface of PCL/PVP bicomponent fibers after extracting PVP. In addition, SK structure with periodic arrangement was successfully prepared by solution induction, and the longer the crystallization time, the larger the lamellar size and periodic distance. The contact angle and DSC measurements showed that when compared with smooth PCL fiber scaffolds, the crystallinity of PCL surface porous fibrous scaffolds and PCL-SK fibrous scaffolds increased, while the hydrophobicity of PCL-SK fibrous scaffolds increased, but the hydrophobicity of PCL porous scaffolds did not change significantly. The hemolysis test showed that the hemolysis rate of PCL surface porous fibrous scaffolds and PCL-SK fibrous scaffolds was higher than that of PCL fibrous scaffolds. According to American Society of Materials and Tests (ASTM) F756-08 standard, all scaffolds were non-hemolytic materials and were suitable for blood contact materials. Coagulation test showed that the coagulation index of PCL surface porous fibrous scaffolds and PCL-SK fibrous scaffolds was higher than that of PCL fibrous scaffolds at 5 and 10 minutes of culture. CCK-8 assay showed that both hierarchically structured fibrous scaffolds were more conducive to PIEC proliferation than PCL fibrous scaffold. CONCLUSION Based on electrospinning technology, solution-induced and blend phase separation methods can be used to construct multi-scale fiber scaffolds with different morphologies, which can not only regulate the surface physicochemical properties of the scaffolds, but also have good blood compatibility and biocompatibility. The hierarchically structured fibrous scaffolds have high application potential in the field of tissue engineering.
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Affiliation(s)
- Qiwei Li
- Key Laboratory of Textile Science & Technology, Ministry of Education, Textile College of Donghua University, Shanghai, 201620, P.R.China
| | - Chaojing Li
- Key Laboratory of Textile Science & Technology, Ministry of Education, Textile College of Donghua University, Shanghai, 201620, P.R.China
| | - Fujun Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, Textile College of Donghua University, Shanghai, 201620,
| | - Sihan Hu
- Key Laboratory of Textile Science & Technology, Ministry of Education, Textile College of Donghua University, Shanghai, 201620, P.R.China
| | - Lu Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, Textile College of Donghua University, Shanghai, 201620, P.R.China
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13
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Im SH, Park SJ, Chung JJ, Jung Y, Kim SH. Creation of polylactide vascular scaffolds with high compressive strength using a novel melt-tube drawing method. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Im SH, Jung Y, Kim SH. In Situ Homologous Polymerization of l-Lactide Having a Stereocomplex Crystal. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01471] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Seung Hyuk Im
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Youngmee Jung
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Korea University
of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Soo Hyun Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Korea University
of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
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15
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Im SH, Kim CY, Jung Y, Jang Y, Kim SH. Biodegradable vascular stents with high tensile and compressive strength: a novel strategy for applying monofilaments via solid-state drawing and shaped-annealing processes. Biomater Sci 2018; 5:422-431. [PMID: 28184401 DOI: 10.1039/c7bm00011a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monofilaments such as those consisting of polyamide (PA), polydioxanone (PDS), and poly(vinylidene fluoride) (PVDF), have been commonly used in various industries. However, most are non-biodegradable, which is unfavorable for many biomedical applications. Although biodegradable polymers offer significant benefits, they are still limited by their weak mechanical properties, which is an obstacle for use as a biomaterial that requires high strength. To overcome the current limitations of biodegradable monofilaments, a novel solid-state drawing (SSD) process was designed to significantly improve the mechanical properties of both PA and poly(l-lactic acid) (PLLA) monofilaments in this study. Both PA and PLLA monofilaments exhibited more than two-fold increased tensile strength and a highly reduced thickness using SSD. In X-ray diffraction and scanning electron microscopy analyses, it was determined that SSD could not only promote the α-crystal phase, but also smoothen the surface of PLLA monofilaments. To apply SSD-monofilaments with superior properties to cardiovascular stents, a shaped-annealing (SA) process was designed as the follow-up process after SSD. Using this process, three types of vascular stents could be fabricated, composed of SSD-monofilaments: double-helix, single-spring and double-spring shaped stents. The annealing temperature was optimized at 80 °C to minimize the loss of mechanical and physical properties of SSD-monofilaments for secondary processing. All three types of vascular stents were tested according to ISO 25539-2. Consequently, it was confirmed that spring-shaped stents had good recovery rate values and a high compressive modulus. In conclusion, this study showed significantly improved mechanical properties of both tensile and compressive strength simultaneously and extended the potential for biomedical applications of monofilaments.
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Affiliation(s)
- Seung Hyuk Im
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. and Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Chang Yong Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. and Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Youngmee Jung
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea and Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
| | - Yangsoo Jang
- Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Soo Hyun Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Korea. and Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea and Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea
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16
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Li J, Li Z, Ye L, Zhao X, Coates P, Caton-Rose F. Structure and biocompatibility improvement mechanism of highly oriented poly(lactic acid) produced by solid die drawing. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.09.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Im SH, Jung Y, Kim SH. Current status and future direction of biodegradable metallic and polymeric vascular scaffolds for next-generation stents. Acta Biomater 2017; 60:3-22. [PMID: 28716610 DOI: 10.1016/j.actbio.2017.07.019] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 07/04/2017] [Accepted: 07/12/2017] [Indexed: 01/18/2023]
Abstract
Because of the increasing incidence of coronary artery disease, the importance of cardiovascular stents has continuously increased as a treatment of this disease. Biodegradable scaffolds fabricated from polymers and metals have emerged as promising materials for vascular stents because of their biodegradability. Although such stent framework materials have shown good clinical efficacy, it is difficult to decide whether polymers or metals are better vascular scaffolds because their properties are different. Therefore, there are still obstacles in the development of biodegradable vascular scaffolds in terms of improving clinical efficacy. This review analyzes the pros and cons of current stent materials with respect to five key factors for next-generation stent and discusses methods of improvement. Furthermore, we discuss biodegradable electronic stents with electrical conductivity, which has been considered unimportant until now, and highlight electrical conductivity as a key factor in the development of next-generation stents.
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18
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Li C, Jiang T, Wang J, Wu H, Guo S, Zhang X, Li J, Shen J, Chen R, Xiong Y. In Situ Formation of Microfibrillar Crystalline Superstructure: Achieving High-Performance Polylactide. ACS APPLIED MATERIALS & INTERFACES 2017; 9:25818-25829. [PMID: 28708370 DOI: 10.1021/acsami.7b06705] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As a biobased and biodegradable polyester, polylactide (PLA) is widely applied in disposable products, biomedical devices, and textiles. Nevertheless, due to its inherent brittleness and inferior strength, simultaneously reinforcing and toughening of PLA without sacrificing its biodegradability is highly desirable. In this work, a robust assembly consisting of compact and well-ordered microfibrillar crystalline superstructure (FCS) surrounded by slightly oriented amorphism, is achieved by a combined external force field. Unlike the classic crystalline superstructures such as shish-kebabs, cylindrites, and lamellae, the newfound FCS with diameter of about 100 nm and length of several tens of micrometers is aggregated with well-aligned crystalline nanofibers. FCS can serve as discontinuous fiber to self-reinforce the amorphous PLA; more importantly, FCS can also act as rivets to pin the propagating fibrillar crazes leading to the formation of dense fibrillar crazes during stretching, which dissipates much energy and translates the failure of PLA from brittle to ductile. Consequently, PLA with FCS exhibits exceptionally simultaneous enhancement in ductility, strength, and stiffness, outperforming normal PLA with increments of 728, 55, and 70% in elongation at break, strength, and modulus, respectively. Therefore, FSC exhibits competitive advantages in achieving high-performance PLA even for other semicrystalline polymers. More significantly, this newfound crystalline superstructure (FCS) provides a new structural model to establish the correlation between structure and performance.
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Affiliation(s)
- Chunhai Li
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Ting Jiang
- School of Chemistry, State Key Laboratory of Biotherapy of Sichuan University , Chengdu 610065, China
| | - Jianfeng Wang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Hong Wu
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Shaoyun Guo
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Xi Zhang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Jiang Li
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Jiabin Shen
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Rong Chen
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
| | - Ying Xiong
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University , Chengdu 610065, China
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19
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Im SH, Lee CW, Bibi G, Jung Y, Kim SH. Supercritical fluid technology parameters affecting size and behavior of stereocomplex polylactide particles and their composites. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24681] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Seung Hyuk Im
- NBITKU‐KIST Graduate School of Converging Science and Technology, Korea UniversitySeongbuk‐gu Seoul02841 Republic of Korea
- Center for BiomaterialsKorea Institute of Science and Technology (KIST)Seoul02792 Republic of Korea
| | - Cheol Woo Lee
- NBITKU‐KIST Graduate School of Converging Science and Technology, Korea UniversitySeongbuk‐gu Seoul02841 Republic of Korea
- Korea Western Power Co., Ltd, Taean‐eupTaean‐gun Chungcheongnam‐do32140 Republic of Korea
| | - Gulnaz Bibi
- Center for BiomaterialsKorea Institute of Science and Technology (KIST)Seoul02792 Republic of Korea
- Department of Chemical and Biochemical EngineeringDongguk University‐SeoulJung‐gu Seoul100‐715 Republic of Korea
| | - Youngmee Jung
- Center for BiomaterialsKorea Institute of Science and Technology (KIST)Seoul02792 Republic of Korea
- Korea University of Science and TechnologyYuseong‐gu Daejeon34113 Republic of Korea
| | - Soo Hyun Kim
- NBITKU‐KIST Graduate School of Converging Science and Technology, Korea UniversitySeongbuk‐gu Seoul02841 Republic of Korea
- Center for BiomaterialsKorea Institute of Science and Technology (KIST)Seoul02792 Republic of Korea
- Korea University of Science and TechnologyYuseong‐gu Daejeon34113 Republic of Korea
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