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Xing S, Zhang H, Liu L, Wang D, Ge N, Liu X. Selective Tumor Inhibition Effect of Drug-Free Layered Double Hydroxide-Based Films via Responding to Acidic Microenvironment. ACS Biomater Sci Eng 2024. [PMID: 38967561 DOI: 10.1021/acsbiomaterials.4c00780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
Nickel-titanium alloy stents are widely used in the interventional treatment of various malignant tumors, and it is important to develop nickel-titanium alloy stents with selective cancer-inhibiting and antibacterial functions to avoid malignant obstruction caused by tumor invasion and bacterial colonization. In this work, an acid-responsive layered double hydroxide (LDH) film was constructed on the surface of a nickel-titanium alloy by hydrothermal treatment. The release of nickel ions from the film in the acidic tumor microenvironment induces an intracellular oxidative stress response that leads to cell death. In addition, the specific surface area of LDH nanosheets could be further regulated by heat treatment to modulate the release of nickel ions in the acidic microenvironment, allowing the antitumor effect to be further enhanced. This acid-responsive LDH film also shows a good antibacterial effect against S. aureus and E. coli. Besides, the LDH film prepared without the introduction of additional elements maintains low toxicity to normal cells in a normal physiological environment. This work offers some guidance for the design of a practical nickel-titanium alloy stent for the interventional treatment of tumors.
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Affiliation(s)
- Shun Xing
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haifeng Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lidan Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Donghui Wang
- School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Naijian Ge
- Intervention Center, Eastern Hepatobiliary Surgery Hospital, The Third Affiliated Hospital of Naval Medical University, Shanghai 200438, China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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2
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Li C, Gao D, Li C, Cheng G, Zhang L. Fighting against biofilm: The antifouling and antimicrobial material. Biointerphases 2024; 19:040802. [PMID: 39023091 DOI: 10.1116/6.0003695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 06/07/2024] [Indexed: 07/20/2024] Open
Abstract
Biofilms are groups of microorganisms protected by self-secreted extracellular substances. Biofilm formation on the surface of biomaterial or engineering materials becomes a severe challenge. It has caused significant health, environmental, and societal concerns. It is believed that biofilms lead to life-threatening infection, medical implant failure, foodborne disease, and marine biofouling. To address these issues, tremendous effort has been made to inhibit biofilm formation on materials. Biofilms are extremely difficult to treat once formed, so designing material and coating bearing functional groups that are capable of resisting biofilm formation has attracted increasing attention for the last two decades. Many types of antibiofilm strategies have been designed to target different stages of biofilm formation. Development of the antibiofilm material can be classified into antifouling material, antimicrobial material, fouling release material, and integrated antifouling/antimicrobial material. This review summarizes relevant research utilizing these four approaches and comments on their antibiofilm properties. The feature of each method was compared to reveal the research trend. Antibiofilm strategies in fundamental research and industrial applications were summarized.
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Affiliation(s)
- Chao Li
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310030, China
- Department of Pharmaceutical Sciences, State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Dongdong Gao
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310030, China
- Department of Pharmaceutical Sciences, State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Chunmei Li
- Tsinglan School, Songshan Lake, Dongguan 523000, China
| | - Gang Cheng
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310030, China
| | - Lijun Zhang
- Liaoning Provincial Key Laboratory of Cornea and Ocular Surface Diseases, Liaoning Provincial Optometry Technology Engineering Research Center, The Third People's Hospital of Dalian, Dalian, Liaoning 116033, China
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Zhang H, Yang J, Sun R, Han S, Yang Z, Teng L. Microfluidics for nano-drug delivery systems: From fundamentals to industrialization. Acta Pharm Sin B 2023; 13:3277-3299. [PMID: 37655333 PMCID: PMC10466004 DOI: 10.1016/j.apsb.2023.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/10/2022] [Accepted: 12/15/2022] [Indexed: 01/27/2023] Open
Abstract
In recent years, owing to the miniaturization of the fluidic environment, microfluidic technology offers unique opportunities for the implementation of nano drug delivery systems (NDDSs) production processes. Compared with traditional methods, microfluidics improves the controllability and uniformity of NDDSs. The fast mixing and laminar flow properties achieved in the microchannels can tune the physicochemical properties of NDDSs, including particle size, distribution and morphology, resulting in narrow particle size distribution and high drug-loading capacity. The success of lipid nanoparticles encapsulated mRNA vaccines against coronavirus disease 2019 by microfluidics also confirmed its feasibility for scaling up the preparation of NDDSs via parallelization or numbering-up. In this review, we provide a comprehensive summary of microfluidics-based NDDSs, including the fundamentals of microfluidics, microfluidic synthesis of NDDSs, and their industrialization. The challenges of microfluidics-based NDDSs in the current status and the prospects for future development are also discussed. We believe that this review will provide good guidance for microfluidics-based NDDSs.
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Affiliation(s)
- Huan Zhang
- School of Life Sciences, Jilin University, Changchun 130012, China
| | - Jie Yang
- School of Life Sciences, Jilin University, Changchun 130012, China
| | - Rongze Sun
- School of Life Sciences, Jilin University, Changchun 130012, China
| | - Songren Han
- School of Life Sciences, Jilin University, Changchun 130012, China
| | - Zhaogang Yang
- School of Life Sciences, Jilin University, Changchun 130012, China
| | - Lesheng Teng
- School of Life Sciences, Jilin University, Changchun 130012, China
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4
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Liu Z, Guo S, Dong L, Wu P, Li K, Li X, Li X, Qian H, Fu Q. A tannic acid doped hydrogel with small extracellular vesicles derived from mesenchymal stem cells promotes spinal cord repair by regulating reactive oxygen species microenvironment. Mater Today Bio 2022; 16:100425. [PMID: 36186847 PMCID: PMC9523385 DOI: 10.1016/j.mtbio.2022.100425] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 07/20/2022] [Accepted: 09/09/2022] [Indexed: 11/05/2022] Open
Abstract
Spinal cord injury (SCI) is a serious disease of the central nervous system that is associated with a poor prognosis; furthermore, existing clinical treatments cannot restore nerve function in an effective manner. Inflammatory responses and the increased production of reactive oxygen species (ROS) in the microenvironment of the lesion are major obstacles that inhibit the recovery of SCI. Small extracellular vesicles (sEVs), derived from mesenchymal stem cells, are suitable options for cell-free therapy and have been shown to exert therapeutic effects in SCI, thus providing a potential strategy for microenvironment regulation. However, the effective retention, controlled release, and integration of small extracellular vesicles into injured spinal cord tissue are still a major challenge. Herein, we fabricated an N-acryloyl glycinamide/gelatin methacrylate/Laponite/Tannic acid (NAGA/GelMA/LPN/TA, NGL/T) hydrogel with sustainable sEV release (sEVs-NGL/T) to promote the recovery of motor function after SCI. The newly developed functional sEVs-NGL/T hydrogel exhibited excellent antioxidant properties in an H2O2-simulated peroxidative microenvironment in vitro. Implantation of the functional sEVs-NGL/T hydrogel in vivo could encapsulate sEVs, exhibiting efficient retention and the sustained release of sEVs, thereby synergistically inducing significant restoration of motor function and urinary tissue preservation. These positive effects can be attributed to the effective mitigation of the inflammatory and ROS microenvironment. Therefore, sEVs-NGL/T therapy provides a promising strategy for the sEV-based therapy in the treatment of SCI by comprehensively regulating the pathological microenvironment.
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Key Words
- 4-HNE, 4-hydroxynonenal
- 8-OHdG, 8-hydroxy-2′-deoxyguanosine
- ChAT, choline acetyl transferase
- GFAP, glial fibrillary acidic protein
- HucMSCs, Human umbilical cord mesenchymal stem cells
- Hydrogel
- Mesenchymal stem cell
- NF, neurofilament
- NGL/T, N-acryloyl glycinamide/gelatinmethacrylate/Laponite/Tannic acid
- ROS, reactive oxygen species
- Reactive oxygen species
- SCI, spinal cord injury
- Small extracellular vesicle
- Spinal cord injury
- Tannic acid
- sEVs, small extracellular vesicles
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Affiliation(s)
- Zhong Liu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, PR China
| | - Song Guo
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, PR China
| | - Lanlan Dong
- School of Mechanical Engineering, Shanghai Jiao Tong University, State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, PR China
| | - Peipei Wu
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, 212013, PR China
| | - Kewei Li
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, PR China
| | - Xinhua Li
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, PR China
| | - Xiang Li
- School of Mechanical Engineering, Shanghai Jiao Tong University, State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, PR China
| | - Hui Qian
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, 212013, PR China.,NHC Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai, 200040, PR China
| | - Qiang Fu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, PR China
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5
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Liu C, Cheng F, Liu B, Gao D, Cheng G, Li C, Wang H, He W. Versatile, Oxygen-Insensitive Surface-Initiated Anionic Polymerization to Prepare Functional Polymer Brushes in Aqueous Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1001-1010. [PMID: 34949091 DOI: 10.1021/acs.langmuir.1c02416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Surface-initiated polymerization is an attractive approach to achieve desired interfacial compositions and properties on a wide range of substrates and surfaces. Due to mild reaction conditions, multiple surface-initiated polymerization methods, such as atom-transfer radical polymerization (ATRP), reversible addition-fragmentation chain-transfer polymerization, and so forth, have been developed and studied in academia and industry. However, the current methods require the combination of metal catalysts, special initiators, and oxygen removal. Herein, we developed a surface-initiated carbanion-mediated anionic polymerization (SI-CMAP), which can be conducted in aqueous solutions in the presence of oxygen without the need for metal catalysts. Zwitterionic 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate (SBMA) was selected as a model monomer to develop and demonstrate this strategy. The vinyl sulfone (VS) groups displayed on substrate surfaces reacted with N-methylimidazole (NMIM), which was used as the in situ initiator. The polymerization mechanism was extensively studied from many aspects at room temperature, including the changes in reaction conditions, factors affecting the polymerization extent, and substrate surfaces. We also demonstrated the compatibility of this method with a broad spectrum of monomers ranging from SBMA to other acrylates and acrylamides by using glycine betaine as a reaction additive. This method was also evaluated for the preparation of polymer-coated nanoparticles. For polymer-coated silica nanoparticles, their hydrodynamic diameter, copper contamination, and effects of salt and protein concentrations were compared with SI-ATRP in parallel. SI-CMAP in aqueous solutions in air and the absence of metal catalysts make this method sustainable and cost-effective. We believe that SI-CMAP can be readily adapted to the industrial surface coating and large-scale nanoparticle preparation under mild conditions.
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Affiliation(s)
- Chong Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China
- Department of Polymer Science & Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Fang Cheng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China
- Department of Pharmacy, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Bo Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China
- Department of Pharmacy, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Dongdong Gao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China
- Department of Polymer Science & Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Gang Cheng
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Chunmei Li
- Tsinglan School, Songshan Lake, Dongguan, Guangdong 523000, China
| | - Huanan Wang
- School of Bioengineering, Dalian University of Technology, Dalian, Liaoning 116023, China
| | - Wei He
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China
- Department of Polymer Science & Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116023, China
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6
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Rahimnejad M, Rabiee N, Ahmadi S, Jahangiri S, Sajadi SM, Akhavan O, Saeb MR, Kwon W, Kim M, Hahn SK. Emerging Phospholipid Nanobiomaterials for Biomedical Applications to Lab-on-a-Chip, Drug Delivery, and Cellular Engineering. ACS APPLIED BIO MATERIALS 2021; 4:8110-8128. [PMID: 35005915 DOI: 10.1021/acsabm.1c00932] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The design of advanced nanobiomaterials to improve analytical accuracy and therapeutic efficacy has become an important prerequisite for the development of innovative nanomedicines. Recently, phospholipid nanobiomaterials including 2-methacryloyloxyethyl phosphorylcholine (MPC) have attracted great attention with remarkable characteristics such as resistance to nonspecific protein adsorption and cell adhesion for various biomedical applications. Despite many recent reports, there is a lack of comprehensive review on the phospholipid nanobiomaterials from synthesis to diagnostic and therapeutic applications. Here, we review the synthesis and characterization of phospholipid nanobiomaterials focusing on MPC polymers and highlight their attractive potentials for applications in micro/nanofabricated fluidic devices, biosensors, lab-on-a-chip, drug delivery systems (DDSs), COVID-19 potential usages for early diagnosis and even treatment, and artificial extracellular matrix scaffolds for cellular engineering.
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Affiliation(s)
- Maedeh Rahimnejad
- Biomedical Engineering Institute, School of Medicine, Université de Montréal, Montreal, Quebec H2X 0A9, Canada.,Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran , Iran
| | - Navid Rabiee
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran , Iran
| | - Sepideh Ahmadi
- Student Research Committee, Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran 19857-17443, Iran.,Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran 19857-17443, Iran
| | - Sepideh Jahangiri
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran , Iran.,Department of Biomedical Sciences, Faculty of Medicine, Université de Montréal, Montreal, Quebec H2X 0A9, Canada
| | - S Mohammad Sajadi
- Department of Nutrition, Cihan University-Erbil, Erbil 44001, Kurdistan Region, Iraq.,Department of Phytochemistry, SRC, Soran University, Soran City 44008, Kurdistan Region, Iraq
| | - Omid Akhavan
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran , Iran
| | - Mohammad Reza Saeb
- Department of Polymer Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12 80-233, Gdańsk 80-233, Poland
| | - Woosung Kwon
- Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul 04310, Korea
| | - Mungu Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
| | - Sei Kwang Hahn
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673, Korea
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7
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Zhuang Y, Zhang C, Cheng M, Huang J, Liu Q, Yuan G, Lin K, Yu H. Challenges and strategies for in situ endothelialization and long-term lumen patency of vascular grafts. Bioact Mater 2021; 6:1791-1809. [PMID: 33336112 PMCID: PMC7721596 DOI: 10.1016/j.bioactmat.2020.11.028] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/11/2020] [Accepted: 11/24/2020] [Indexed: 02/08/2023] Open
Abstract
Vascular diseases are the most prevalent cause of ischemic necrosis of tissue and organ, which even result in dysfunction and death. Vascular regeneration or artificial vascular graft, as the conventional treatment modality, has received keen attentions. However, small-diameter (diameter < 4 mm) vascular grafts have a high risk of thrombosis and intimal hyperplasia (IH), which makes long-term lumen patency challengeable. Endothelial cells (ECs) form the inner endothelium layer, and are crucial for anti-coagulation and thrombogenesis. Thus, promoting in situ endothelialization in vascular graft remodeling takes top priority, which requires recruitment of endothelia progenitor cells (EPCs), migration, adhesion, proliferation and activation of EPCs and ECs. Chemotaxis aimed at ligands on EPC surface can be utilized for EPC homing, while nanofibrous structure, biocompatible surface and cell-capturing molecules on graft surface can be applied for cell adhesion. Moreover, cell orientation can be regulated by topography of scaffold, and cell bioactivity can be modulated by growth factors and therapeutic genes. Additionally, surface modification can also reduce thrombogenesis, and some drug release can inhibit IH. Considering the influence of macrophages on ECs and smooth muscle cells (SMCs), scaffolds loaded with drugs that can promote M2 polarization are alternative strategies. In conclusion, the advanced strategies for enhanced long-term lumen patency of vascular grafts are summarized in this review. Strategies for recruitment of EPCs, adhesion, proliferation and activation of EPCs and ECs, anti-thrombogenesis, anti-IH, and immunomodulation are discussed. Ideal vascular grafts with appropriate surface modification, loading and fabrication strategies are required in further studies.
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Affiliation(s)
- Yu Zhuang
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Chenglong Zhang
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Mengjia Cheng
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Jinyang Huang
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Qingcheng Liu
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Guangyin Yuan
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Kaili Lin
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
| | - Hongbo Yu
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
- National Clinical Research Center for Oral Diseases, Shanghai, 200011, China
- Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai, 200011, China
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8
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Kang S, Park S, Baek I, Song Y, Kim S, Choi D, Kim J, Lee Y. Development of poly(D,L-lactic-co-glycolic acid) films coated with biomembrane-mimicking polymers for anti-adhesion activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 120:111780. [PMID: 33545908 DOI: 10.1016/j.msec.2020.111780] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/12/2020] [Accepted: 11/26/2020] [Indexed: 12/19/2022]
Abstract
A physical barrier is one of the most effective strategies to alleviate excessive postoperative adhesion (POA) between tissues at an injury site. To overcome the limitations of current polymeric film-type physical barriers, we suggest a film of poly(lactic-co-glycolic acid) (PLGA) that is non-covalently coated with poly(2-methacryloyloxyethyl phosphorylcholine (MPC)-co-n-butyl methacrylate (BMA)) (PMB). While maintaining the degradability and mechanical properties of PLGA, the PMB coating introduces strong anti-adhesive properties to the film by forming a zwitterionic MPC-based surface through the hydrophobic interactions between BMA moieties and PLGA. Compared to SurgiWrap®, the commercially available poly(lactic acid)-based anti-adhesive film against POA, the PMB-coated PLGA film is much more inhibitory against protein adsorption and fibroblast adhesion, processes that are crucial to the POA process. PMB coating also inhibits the expression of fibronectin containing extra domain A (FN-EDA), α-smooth muscle actin (α-SMA), and collagen type IV alpha 2 (COL4A2), which are marker genes and proteins involved in fibroblast activation and excessive fibrosis during POA. Such inhibitory activities are clearly observed in a 3-dimensional culture of fibroblasts within a collagen matrix, which mimics the in vivo environment of an injury site, as well as in a 2-dimensional culture. The kinetics and the stability of the PMB coating suggest potential future clinical use to coat PLGA films to create a film-type anti-adhesion barrier that overcomes the limitations of current products.
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Affiliation(s)
- Sunah Kang
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sohyun Park
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Insu Baek
- SOLSION Biomedical, Inc., 25, Gasan digital 1-ro, Geumcheon-gu, Seoul 08594, Republic of Korea
| | - Youngjun Song
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sungwhan Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Dongkil Choi
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jungah Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Yan Lee
- Department of Chemistry, College of Natural Sciences, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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9
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Huang Z, Ghasemi H. Hydrophilic polymer-based anti-biofouling coatings: Preparation, mechanism, and durability. Adv Colloid Interface Sci 2020; 284:102264. [PMID: 32947152 DOI: 10.1016/j.cis.2020.102264] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 01/16/2023]
Abstract
Anti-biofouling materials that combat microorganism attachment have been intensively studied due to the ever-growing demand on smart and durable coatings. Although various hydrophilic polymer surfaces demonstrated superior anti-biofouling properties, their practical application was hampered by the undesired mechanical vulnerability and complicated fabrication process. In this review, we summarized the mechanically and chemically robust anti-biofouling coatings into six strategies namely (i) 3D-grafted coatings, (ii) hierarchical spheres-based coatings, (iii) inorganic nanomaterials-reinforced coatings, (iv) hydrolysis-based coating, (v) semi-interpenetrating structure-based coatings, and (vi) layer-by-layer (LbL) assembled coatings. The anti-biofouling efficacy and durability of these coatings over a series of challenges were also comprehensively presented. The purpose of this review is to inspire researchers to develop novel anti-biofouling coatings for future practical applications.
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10
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Birajdar MS, Kim BH, Sutthiwanjampa C, Kang SH, Heo CY, Park H. Inhibition of Capsular Contracture of Poly (Dimethyl Siloxane) Medical Implants by Surface Modification with Itaconic Acid Conjugated Gelatin. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.03.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Thompson HM, Lim D, Banks C, Grayson JW, Ayinala S, Cho D, Woodworth BA. Antibiotic eluting sinus stents. Laryngoscope Investig Otolaryngol 2020; 5:598-607. [PMID: 32864430 PMCID: PMC7444760 DOI: 10.1002/lio2.423] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/29/2020] [Accepted: 06/12/2020] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES Chronic rhinosinusitis (CRS) is a multifactorial disease affecting up to 16% of the United States population and disproportionately affecting the cystic fibrosis (CF) patient population. Despite treating the underlying infection, the use of systemic antibiotics has shown little efficacy in alleviation of symptom burden. This review seeks to discuss recent research on novel antibiotic eluting stent therapy in vitro and within animal models as well as the factors that contribute to its efficacy. DATA SOURCES PubMed literature review. REVIEW METHODS A review of all published literature related to antibiotic eluting sinus stents was conducted to integrate and summarize this innovative approach to chronic sinus infections. RESULTS Placement of the ciprofloxacin sinus stent (CSS) and ciprofloxacin-ivacaftor sinus stent (CISS) exhibited improvement in endoscopic and radiographic findings in rabbit CRS models. While the CSS showed an overall trend toward improvement in microscopic findings and a reduction in biofilm mass, there remained a significant quantity of planktonic bacteria due to antibiotic depletion from an initial burst release in the first 48 hours of stent placement. The CISS and ciprofloxacin-azithromycin sinus stents (CASSs) exhibited controlled antibiotic release over the study period leading to greatly reduced planktonic bacterial load and biofilm mass. In vitro studies indicate that CASS may be just as efficacious at reducing biofilm mass. CONCLUSION Antibiotic eluting sinus stents show significant promise as a novel therapeutic strategy for CRS. The CISS may have particular promise for the CF patient population by addressing both the infectious and genetic components of disease. Animal studies demonstrate significant promise for translation into human studies. Human clinical trials are warranted to determine the efficacy of antibiotic sinus stents in human patients. LEVEL OF EVIDENCE NA.
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Affiliation(s)
- Harrison M. Thompson
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Dong‐Jin Lim
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Catherine Banks
- Prince of Wales and Sydney HospitalsUniversity of New South WalesSydneyNew South WalesAustralia
| | - Jessica W. Grayson
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Samrath Ayinala
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Do‐Yeon Cho
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
- Gregory Fleming James Cystic Fibrosis Research CenterBirminghamAlabamaUSA
| | - Bradford A. Woodworth
- Department of Otolaryngology Head and Neck SurgeryUniversity of Alabama at BirminghamBirminghamAlabamaUSA
- Gregory Fleming James Cystic Fibrosis Research CenterBirminghamAlabamaUSA
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12
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Spontaneously and reversibly forming phospholipid polymer hydrogels as a matrix for cell engineering. Biomaterials 2020; 230:119628. [DOI: 10.1016/j.biomaterials.2019.119628] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/11/2019] [Accepted: 11/11/2019] [Indexed: 12/16/2022]
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13
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Lim CM, Li MX, Joung YK. Surface-Modifying Polymers for Blood-Contacting Polymeric Biomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1250:189-198. [PMID: 32601946 DOI: 10.1007/978-981-15-3262-7_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bulk blending is considered as one of the most effective and straightforward ways to improve the hemo-compatibility of blood-contacting polymeric biomaterials among many surface modification methods. Zwitterionic structure-, glycocalyx-like structure-, and heparin-like structure-based oligomers have been synthesized as additives and blended with base polymers to improve the blood compatibility of base polymers. Fluorinated end- and side-functionalized oligomers could promote the migration of functionalized groups to the surface of biomedical polymers without changing their bulk properties, and it highly depends on the number and concentration of functional groups. Moreover, oligomers having both zwitterion and fluorine are receiving considerable attention due to their desirable phase separation, which can avoid undesired protein adsorption and platelet adhesion. The surface analysis of the surface-modified materials is usually investigated by analytical tools such as contact angle measurement, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Blood compatibility is mainly evaluated via platelet adhesion and protein adsorption test, and the result showed a significant decrease in the amount of undesirable adsorption. These analyses indicated that surface modification using bulk blending technique effectively improves blood compatibility of polymeric biomaterials.
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Affiliation(s)
- Chung-Man Lim
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - Mei-Xian Li
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - Yoon Ki Joung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea. .,Division of Bio-Medical Science and Technology, Korea University of Science and Technology (UST), Deajeon, Republic of Korea.
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14
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Araste F, Abnous K, Hashemi M, Dehshahri A, Detampel P, Alibolandi M, Ramezani M. Na +/K + ATPase-targeted delivery to metastatic breast cancer models. Eur J Pharm Sci 2019; 143:105207. [PMID: 31870814 DOI: 10.1016/j.ejps.2019.105207] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/08/2019] [Accepted: 12/19/2019] [Indexed: 12/11/2022]
Abstract
In this study, we reported doxorubicin (DOX)-encapsulated nanoparticles (NPs) formulated with biocompatible and biodegradable poly (lactic-co-glycolic acid) (PLGA) and modified with a 13-amino acid peptide (S3) against sodium/potassium (Na+/K+)-ATPase pump alpha subunit to investigate its potential as antitumor agent. The morphological properties and size dispersity of the prepared nanoparticles were evaluated using scanning electron microscope (SEM) and dynamic light scattering (DLS). The encapsulation efficiency and in vitro release during 7 days were evaluated. Comparative in vitro cytotoxicity experiments demonstrated that the S3-conjugated nanoparticles (S3-PLGA-DOX NPs) had higher antiproliferative activity. Flow cytometry analysis confirmed the enhanced cellular uptake of S3-PLGA-DOX NPs in comparison with PLGA-DOX. In vivo study in 4T1 tumor-bearing BALB/C mice revealed that the S3-functionalized DOX-loaded NPs improved antitumor activity and survival rate of 4T1 tumor bearing mice. In this regard, conjugation of S3 peptide to the surface of DOX-loaded PLGA NPs provides site-specific delivery of DOX, inhibits 4T1 tumor growth in vivo and significantly decreases systemic toxicity. The obtained results suggested that the new (Na+/K+)-ATPase pump-targeted PLGA NPs as a target-selective delivery system for DOX has great potential for the treatment of breast cancer.
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Affiliation(s)
- Fatemeh Araste
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Khalil Abnous
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Hashemi
- Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali Dehshahri
- Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Pascal Detampel
- Division of Pharmaceutical Technology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, Basel, Switzerland
| | - Mona Alibolandi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Mohammad Ramezani
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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15
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Filgueira CS, Igo SR, Wang DK, Hirsch M, Schulz DG, Bruckner BA, Grattoni A. Technologies for intrapericardial delivery of therapeutics and cells. Adv Drug Deliv Rev 2019; 151-152:222-232. [PMID: 30797957 DOI: 10.1016/j.addr.2019.02.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 12/12/2022]
Abstract
The pericardium, which surrounds the heart, provides a unique enclosed volume and a site for the delivery of agents to the heart and coronary arteries. While strategies for targeting the delivery of therapeutics to the heart are lacking, various technologies and nanodelivery approaches are emerging as promising methods for site specific delivery to increase therapeutic myocardial retention, efficacy, and bioactivity, while decreasing undesired systemic effects. Here, we provide a literature review of various approaches for intrapericardial delivery of agents. Emphasis is given to sustained delivery approaches (pumps and catheters) and localized release (patches, drug eluting stents, and support devices and meshes). Further, minimally invasive access techniques, pericardial access devices, pericardial washout and fluid analysis, as well as therapeutic and cell delivery vehicles are presented. Finally, several promising new therapeutic targets to treat heart diseases are highlighted.
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Zhu YJ, Lu BQ. Deformable Biomaterials Based on Ultralong Hydroxyapatite Nanowires. ACS Biomater Sci Eng 2019; 5:4951-4961. [DOI: 10.1021/acsbiomaterials.9b01183] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ying-Jie Zhu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Bing-Qiang Lu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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17
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Ishihara K. Revolutionary advances in 2‐methacryloyloxyethyl phosphorylcholine polymers as biomaterials. J Biomed Mater Res A 2019; 107:933-943. [DOI: 10.1002/jbm.a.36635] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 01/24/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Kazuhiko Ishihara
- Department of Materials Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 Japan
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18
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Yamazawa Y, Kato H, Nakaji-Hirabayashi T, Yoshikawa C, Kitano H, Ohno K, Saruwatari Y, Matsuoka K. Bioinactive semi-interpenetrating network gel layers: zwitterionic polymer chains incorporated in a cross-linked polymer brush. J Mater Chem B 2019. [DOI: 10.1039/c8tb03228a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A thin gel layer with thermo-responsive polymer brushes and semi-interpenetrating PCMB exhibited the switching of bio-inert properties depending on temperature.
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Affiliation(s)
- Yuka Yamazawa
- Graduate School of Science and Engineering
- University of Toyama
- Toyama 930-8555
- Japan
| | - Hibiki Kato
- Graduate School of Science and Engineering
- University of Toyama
- Toyama 930-8555
- Japan
| | - Tadashi Nakaji-Hirabayashi
- Graduate School of Science and Engineering
- University of Toyama
- Toyama 930-8555
- Japan
- Graduate School of Innovative Life Sciences
| | - Chiaki Yoshikawa
- International Centre for Materials Nanoarchitectonics
- National Institute of Material Science
- Ibaraki 305-0047
- Japan
| | - Hiromi Kitano
- Graduate School of Science and Engineering
- University of Toyama
- Toyama 930-8555
- Japan
- Graduate School of Innovative Life Sciences
| | - Kohji Ohno
- Institute for Chemical Research
- Kyoto University
- Kyoto 611-0011
- Japan
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Tagaya M, Hara K, Takahashi S, Nagoshi S, Handa H, Okano S, Murataka T. Antithrombotic properties of hemofilter coated with polymer having a hydrophilic blood-contacting layer. Int J Artif Organs 2018; 42:88-94. [PMID: 30486706 PMCID: PMC6343425 DOI: 10.1177/0391398818815480] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE: Extracorporeal circulation devices are coated with a biocompatible polymer coating agent (BPCA) that has a hydrophilic blood-contacting layer, but hemofilters are not. We aimed to investigate the antithrombotic properties of a BPCA-coated hemofilter. METHODS: Four experiments using BPCA-coated circuits and non-coated hemofilters and four experiments using BPCA-coated circuits and BPCA-coated hemofilters were performed with whole human blood and compared by measuring the circuit pressure every 5 min, antithrombin activity every 40 min, and thrombin-antithrombin complex every 40 min, for a total of 240 min of recirculation. RESULTS: The mean time required for the pressure at the inlet of the hemofilter to increase sharply was longer in BPCA-coated than in non-coated hemofilters (66 ± 11 min vs 25 ± 9 min, p < 0.01). The mean antithrombin activity value at 200 and 240 min of recirculation was significantly higher in the experiments with BPCA-coated versus non-coated hemofilters (43.3 ± 2.87 vs 33.3 ± 5.74, p = 0.04; 42.8 ± 3.59 vs 31.0 ± 5.35, p = 0.01, respectively); the antithrombin activity values at the other time points were not significantly different. Furthermore, all thrombin-antithrombin complex values in experiments with the BPCA-coated hemofilters achieved overrange at 80 min of recirculation, whereas those with the non-coated hemofilter achieved overrange at 40 min. CONCLUSION: This study suggests that BPCA-coated hemofilters can inhibit antithrombin consumption, contributing to antithrombotic effects in extracorporeal circulation circuits.
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Affiliation(s)
- Masashi Tagaya
- 1 Department of Medical Engineering, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Kazunobu Hara
- 1 Department of Medical Engineering, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Shunsuke Takahashi
- 2 Department of Nephrology, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Saki Nagoshi
- 3 Department of Clinical Laboratory, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Hiroki Handa
- 1 Department of Medical Engineering, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Shinya Okano
- 1 Department of Medical Engineering, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Takuo Murataka
- 1 Department of Medical Engineering, National Hospital Organization Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
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20
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Ji HF, He C, Wang R, Fan X, Xiong L, Zhao WF, Zhao CS. Multifunctionalized polyethersulfone membranes with networked submicrogels to improve antifouling property, antibacterial adhesion and blood compatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 96:402-411. [PMID: 30606548 DOI: 10.1016/j.msec.2018.11.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 09/23/2018] [Accepted: 11/26/2018] [Indexed: 01/24/2023]
Abstract
Intensive efforts have been employed in modifying biomedical membranes. Among them, blending is recognized as a simple method. However, the conventional blending materials commonly lead to an insufficient modification, which is mainly caused by the poor miscibility between the blending materials and the matrixes, the elution of the hydrophilic materials from the matrixes during the use and storage, and the insufficient surface enrichment of the blending materials. Aiming to solve the abovementioned disadvantages, we developed novel polyethersulfone/poly(acrylic acid-co-N-vinyl-2-pyrrolidone) networked submicrogels (PES/P(AA-VP) NSs), which were blended with PES to enhance the antifouling properties, antibacterial adhesion and haemocompatible properties of PES membranes. As results, the PES/P(AA-VP) NSs showed good miscibility with the PES matrix, and hydrophilic submicrogels would enrich onto the membrane surface during the phase inversion process due to the surface segregation. The entanglement between the PES matrix and the networked submicrogels would effectively limit the elution of the submicrogels. In conclusion, the modified PES membranes prepared by blending with the PES/P(AA-VP) NSs might draw great attention for the application in haemodialysis fields.
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Affiliation(s)
- Hai-Feng Ji
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Chao He
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Rui Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xin Fan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Lian Xiong
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Wei-Feng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China.
| | - Chang-Sheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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Ghosh S, Abanteriba S, Wong S, Houshyar S. Selective laser melted titanium alloys for hip implant applications: Surface modification with new method of polymer grafting. J Mech Behav Biomed Mater 2018; 87:312-324. [PMID: 30103113 DOI: 10.1016/j.jmbbm.2018.07.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 07/20/2018] [Accepted: 07/22/2018] [Indexed: 01/05/2023]
Abstract
A significant number of hip replacements (HR) fail permanently despite the success of the medical procedure, due to wear and progressive loss of osseointegration of implants. An ideal model should consist of materials with a high resistance to wear and with good biocompatibility. This study aims to develop a new method of grafting the surface of selective laser melted (SLM) titanium alloy (Ti-6Al-4V) with poly (2-methacryloyloxyethyl phosphorylcholine) (PMPC), to improve the surface properties and biocompatibility of the implant. PMPC was grafted onto the SLM fabricated Ti-6Al-4V, applying the following three techniques; ultraviolet (UV) irradiation, thermal heating both under normal atmosphere and UV irradiation under N2 gas atmosphere. Scanning electron microscopy (SEM), 3D optical profiler, energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FTIR) were used to characterise the grafted surface. Results demonstrated that a continuous PMPC layer on the Ti-6Al-4V surface was achieved using the UV irradiation under N2 gas atmosphere technique, due to the elimination of oxygen from the system. As indicated in the results, one of the advantages of this technique is the presence of phosphorylcholine, mostly on the surface, which reveals the existence of a strong chemical bond between the grafted layer (PMPC) and substrate (Ti-6Al-4V). The nano-scratch test revealed that the PMPC grafted surface improves the mechanical strength of the surface and thus, protects the underlying implant substrate from scratching under high loads.
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Affiliation(s)
- Subir Ghosh
- School of Engineering, RMIT University, Melbourne, 3000 VIC, Australia.
| | | | - Sherman Wong
- School of Science, RMIT University, Melbourne, 3001 VIC, Australia
| | - Shadi Houshyar
- Center for Materials Innovation and Future Fashion (CMIFF), RMIT University, Brunswick, 3056 VIC, Australia
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Lih E, Kum CH, Park W, Chun SY, Cho Y, Joung YK, Park KS, Hong YJ, Ahn DJ, Kim BS, Kwon TG, Jeong MH, Hubbell JA, Han DK. Modified Magnesium Hydroxide Nanoparticles Inhibit the Inflammatory Response to Biodegradable Poly(lactide- co-glycolide) Implants. ACS NANO 2018; 12:6917-6925. [PMID: 29812907 DOI: 10.1021/acsnano.8b02365] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Biodegradable polymers have been extensively used in biomedical applications, ranging from regenerative medicine to medical devices. However, the acidic byproducts resulting from degradation can generate vigorous inflammatory reactions, often leading to clinical failure. We present an approach to prevent acid-induced inflammatory responses associated with biodegradable polymers, here poly(lactide- co-glycolide), by using oligo(lactide)-grafted magnesium hydroxide (Mg(OH)2) nanoparticles, which neutralize the acidic environment. In particular, we demonstrated that incorporating the modified Mg(OH)2 nanoparticles within degradable coatings on drug-eluting arterial stents efficiently attenuates the inflammatory response and in-stent intimal thickening by more than 97 and 60%, respectively, in the porcine coronary artery, compared with that of drug-eluting stent control. We also observed that decreased inflammation allows better reconstruction of mouse renal glomeruli in a kidney tissue regeneration model. Such modified Mg(OH)2 nanoparticles may be useful to extend the applicability and improve clinical success of biodegradable devices used in various biomedical fields.
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Affiliation(s)
- Eugene Lih
- Center for Biomaterials , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Chang Hun Kum
- Center for Biomaterials , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
- Department of Chemical & Biological Engineering and KU-KIST Graduate School of Converging Science & Technology , Korea University , Seoul 02841 , Republic of Korea
| | - Wooram Park
- Department of Biomedical Science , College of Life Sciences, CHA University , 335 Pangyo-ro , Bundang-gu, Seongnam , Gyeonggi 13488 , Republic of Korea
| | - So Young Chun
- BioMedical Research Institute , Kyungpook National University Hospital , Daegu 41944 , Republic of Korea
| | - Youngjin Cho
- Research Group of Food Storage & Distribution , Korea Food Research Institute , Wanju 55365 , Republic of Korea
| | - Yoon Ki Joung
- Center for Biomaterials , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
- Department of Biomedical Engineering , Korea University of Science and Technology , Daejeon 34113 , Republic of Korea
| | - Kwang-Sook Park
- Center for Biomaterials , Korea Institute of Science and Technology , Seoul 02792 , Republic of Korea
| | - Young Joon Hong
- The Heart Center of Chonnam National University Hospital , Gwangju 61469 , Republic of Korea
| | - Dong June Ahn
- Department of Chemical & Biological Engineering and KU-KIST Graduate School of Converging Science & Technology , Korea University , Seoul 02841 , Republic of Korea
| | - Byung-Soo Kim
- School of Chemical and Biological Engineering , Seoul National University , Seoul 08826 , Republic of Korea
| | - Tae Gyun Kwon
- Department of Urology , School of Medicine, Kyungpook National University , Daegu 37224 , Republic of Korea
| | - Myung Ho Jeong
- The Heart Center of Chonnam National University Hospital , Gwangju 61469 , Republic of Korea
| | - Jeffrey A Hubbell
- Institute for Molecular Engineering , University of Chicago , Chicago , Illinois 60637 , United States
| | - Dong Keun Han
- Department of Biomedical Science , College of Life Sciences, CHA University , 335 Pangyo-ro , Bundang-gu, Seongnam , Gyeonggi 13488 , Republic of Korea
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Huang L, Wu J, Liu M, Mao L, Huang H, Wan Q, Dai Y, Wen Y, Zhang X, Wei Y. Direct surface grafting of mesoporous silica nanoparticles with phospholipid choline-containing copolymers through chain transfer free radical polymerization and their controlled drug delivery. J Colloid Interface Sci 2017; 508:396-404. [DOI: 10.1016/j.jcis.2017.08.071] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 08/18/2017] [Accepted: 08/21/2017] [Indexed: 11/16/2022]
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Hemodialysis membrane coated with a polymer having a hydrophilic blood-contacting layer can enhance diffusional performance. Int J Artif Organs 2017; 40:665-669. [PMID: 28777393 PMCID: PMC6159844 DOI: 10.5301/ijao.5000631] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2017] [Indexed: 12/02/2022]
Abstract
Purpose Currently, the foreign surfaces of various extracorporeal circulation devices are coated with a biocompatible polymer coating agent (BPA), which creates a hydrophilic blood-contacting layer to reduce thrombogenicity, while the membranes in hemodialyzers are not. We aimed to clarify other side effects of BPA-coated membranes by examining the diffusion performance in in vitro experiments. Methods We used a polyethersulfone membrane (sieving coefficient of albumin is ≤0.01) coated with BPA product, SEC-1™ (Toyobo), in a hemodialyzer. To estimate the diffusion rates of a wide range of molecules, 2 L of saline containing vancomycin, lysozyme, and albumin were recirculated in the circuit configured with a hemodialyzer, and dialyzed continuously using water. The concentrations of sodium, vancomycin, lysozyme, and albumin were measured every 5 minutes for 30 minutes and compared in experiments with BPA-coated (n = 4) and BPA-noncoated (n = 4) membranes. Results The removal rates of sodium and vancomycin after 5 minutes of dialysis (n = 24) were significantly higher in BPA-coated than noncoated membranes, while those of lysozyme and albumin were not significantly different. The removal rates of sodium and vancomycin after 30 minutes of dialysis (n = 4) were significantly higher, and those of lysozyme were significantly lower in BPA-coated than noncoated membranes, while those of albumin were not significantly different. Conclusions The preliminary study suggests that BPA-coated membranes enhanced the diffusion rate of molecules with low and middle molecular weight without affecting the sieving coefficient of albumin. Thus, BPA coating can enhance the dialysis performance of membranes.
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Controlled release of strontium through neutralization reaction within a methoxy(polyethylene glycol)-polyester hydrogel. J Appl Biomater Funct Mater 2017; 15:e162-e169. [PMID: 27716871 DOI: 10.5301/jabfm.5000313] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2016] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The aim of this study was to develop a minimally invasive hydrogel system that can release strontium ions, an element that has been shown to increase osteoblast proliferation and prohibit bone resorption, in a controlled manner. METHODS SrCO3 was selected as the salt of choice due to potential acid neutralization reaction between SrCO3 and degradation by-products of methoxy(polyethylene glycol)-co-poly(lactic-co-glycolic acid) (mPEG-PLGA): namely, lactic acid and glycolic acid. SrCO3 was incorporated into mPEG-PLGA hydrogel, and the system was assessed for gelation properties, drug release and biocompatibility. RESULTS SrCO3 incorporation at hydrogel to SrCO3 ratios of 5:1, 3:1 and 1:1 (wt%) did not compromise the thermosensitivity of mPEG-PLGA hydrogels. Furthermore, incorporation of SrCO3 at 1:1 ratio prevented copolymer self-catalysis and decreased hydrogel weight loss from 85% to 61% in vitro after 30 days. During the 30-day time frame, zero-order strontium release was observed and was correlated to hydrogel degradation and acidity. The addition of SrCO3 also improved in vivo hydrogel biocompatibility, due to moderation of acidic microenvironment and amelioration of inflammatory response. CONCLUSIONS These results showed that the described system is suitable for the extended release of strontium and exhibits potential for localized treatment for osteoporosis or as a bone void filler.
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Ramot Y, Haim-Zada M, Domb AJ, Nyska A. Biocompatibility and safety of PLA and its copolymers. Adv Drug Deliv Rev 2016; 107:153-162. [PMID: 27058154 DOI: 10.1016/j.addr.2016.03.012] [Citation(s) in RCA: 285] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Revised: 03/24/2016] [Accepted: 03/26/2016] [Indexed: 12/20/2022]
Abstract
PLA and its copolymers are commonly used for a wide variety of applications. While they are considered to be biocompatible, side effects resulting from their implantation have been reported. The implantation of biomaterials always results in a foreign body reaction. Such a reaction has also been reported following PLA and its copolymers. This article reviews the process of inflammatory reaction that is to be expected following implantation of PLA, and it highlights specific cases in which the inflammatory reaction can result in safety concerns. The authors also review selected cases from different medical fields to demonstrate possible clinical side effects resulting from its use.
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Prospects for Clinical Applications of Polymer-Coated Haemoconcentrator on Extracorporeal Circuit in Cardiopulmonary Bypass Surgeries. Int J Artif Organs 2016; 39:415-420. [DOI: 10.5301/ijao.5000519] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2016] [Indexed: 11/20/2022]
Abstract
Purpose Extracorporeal circulation circuits used in cardiopulmonary bypass surgeries are increasingly being coated with polymer materials to reduce the thrombogenicity of extracorporeal devices. However, a haemoconcentrator, which corrects haematocrit and electrolyte imbalances, is not coated with polymers. In this study, we sought to assess the filtration performance of polymer-coated haemoconcentrators in order to obtain insight into their prospects for use in clinical applications. Methods In vitro experiments were performed to evaluate the water pressure and flow properties of polymer-coated haemoconcentrators by comparing 3 polymer-coated haemoconcentrators with 3 non-coated haemoconcentrators. The cross-sectional surfaces of both types of haemoconcentrators were observed using a scanning electron microscope (SEM). Results The slopes of the regression lines for estimating the filtrated fluid flow as a function of the transmembrane pressure were 6.286 ± 0.320 for polymer-coated haemoconcentrators and 3.712 ± 0.170 for non-coated haemoconcentrators. These slopes were found to be significantly different and indicate that the filtration velocity is enhanced in polymer-coated haemoconcentrators over that in non-coated haemoconcentrators. However, the hollow fibre damage observed by SEM was not shown to contribute to higher filtration flow in the polymer-coated haemoconcentrator. Taking these results into consideration, we hypothesise that a polymer coating makes a foreign surface on a hollow fibre slippery, owing to the hydrophobicity of the polymer, thereby enhancing the velocity of the filtration. Conclusions The results of this preliminary investigation suggest that a polymer coating can enhance the filtration performance of a haemoconcentrator and that polymer-coated haemoconcentrators might be useful in clinical applications.
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Liu Y, Zhong H, Qin Y, Zhang Y, Liu X, Zhang T. Non-covalent hydrophilization of reduced graphene oxide used as a paclitaxel vehicle. RSC Adv 2016. [DOI: 10.1039/c6ra04349f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Phosphorylcholine oligomer grafted perylene (Perylene-PCn) was synthesized. By π–π stacking interaction of reduced graphene oxide (RGO) and perylene moiety, water dispersible RGO/Perylene-PCn composites were prepared and used as paclitaxel vehicle.
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Affiliation(s)
- Yu Liu
- College of Engineering and Applied Sciences
- Nanjing University
- Nanjing 210093
- China
| | - Han Zhong
- College of Engineering and Applied Sciences
- Nanjing University
- Nanjing 210093
- China
| | - Yu Qin
- College of Engineering and Applied Sciences
- Nanjing University
- Nanjing 210093
- China
| | - Yan Zhang
- College of Engineering and Applied Sciences
- Nanjing University
- Nanjing 210093
- China
- Nanjing Excellence Technology Center for Interventional Medical Devices
| | - Xinfeng Liu
- Department of Neurology
- Jinling Hospital
- Nanjing University School of Medicine
- Nanjing 210003
- China
| | - Tao Zhang
- College of Engineering and Applied Sciences
- Nanjing University
- Nanjing 210093
- China
- Nanjing Excellence Technology Center for Interventional Medical Devices
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Lu Y, Yue Z, Wang W, Cao Z. Strategies on designing multifunctional surfaces to prevent biofilm formation. Front Chem Sci Eng 2015. [DOI: 10.1007/s11705-015-1529-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Goda T, Ishihara K, Miyahara Y. Critical update on 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer science. J Appl Polym Sci 2015. [DOI: 10.1002/app.41766] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tatsuro Goda
- Institute of Biomaterials and Bioengineering; Tokyo Medical and Dental University; 2-3-10 Kanda-Surugadai Chiyoda Tokyo 101-0062 Japan
| | - Kazuhiko Ishihara
- Department of Materials Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo Tokyo 113-8656 Japan
- Department of Bioengineering; The University of Tokyo; 7-3-1 Hongo Bunkyo Tokyo 113-8656 Japan
| | - Yuji Miyahara
- Institute of Biomaterials and Bioengineering; Tokyo Medical and Dental University; 2-3-10 Kanda-Surugadai Chiyoda Tokyo 101-0062 Japan
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Ren X, Feng Y, Guo J, Wang H, Li Q, Yang J, Hao X, Lv J, Ma N, Li W. Surface modification and endothelialization of biomaterials as potential scaffolds for vascular tissue engineering applications. Chem Soc Rev 2015; 44:5680-742. [DOI: 10.1039/c4cs00483c] [Citation(s) in RCA: 359] [Impact Index Per Article: 39.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review highlights the recent developments of surface modification and endothelialization of biomaterials in vascular tissue engineering applications.
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Affiliation(s)
- Xiangkui Ren
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin)
| | - Yakai Feng
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin)
| | - Jintang Guo
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin)
| | - Haixia Wang
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Qian Li
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Jing Yang
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Xuefang Hao
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Juan Lv
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- China
| | - Nan Ma
- Institute of Chemistry and Biochemistry
- Free University of Berlin
- D-14195 Berlin
- Germany
| | - Wenzhong Li
- Department of Cardiac Surgery
- University of Rostock
- D-18057 Rostock
- Germany
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Du M, Ma Y, Su H, Wang X, Zheng Q. Rheological behavior of hydrophobically modified polysulfobetaine methacrylate aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra05017k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polysulfobetaine methacrylate (PSBMA) that was hydrophobically modified with methacrylic acid 2,3-epoxypropyl ester (GMA) was synthesized via micellar copolymerization method. Viscosity of the hydrophobically modified PSBMA solution was sensitive to added salt concentration.
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Affiliation(s)
- Miao Du
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yanjie Ma
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Heng Su
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Xiang Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qiang Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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Parks AC, Sung K, Wu BM. A three-dimensional in vitro model to quantify inflammatory response to biomaterials. Acta Biomater 2014; 10:4742-4749. [PMID: 25091291 DOI: 10.1016/j.actbio.2014.07.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 06/28/2014] [Accepted: 07/23/2014] [Indexed: 11/30/2022]
Abstract
In vivo models are the gold standard for predicting the clinical biomaterial-host response due to the scarcity of in vitro model systems that recapitulate physiological settings. However, the simplicity, control and relatively lower cost of in vitro models make them more appropriate to quantify the contribution by each cell, material and molecule within the healing environment. In this study, human fibroblasts and monocytes are co-cultured in a three-dimensional (3-D) tissue model to study foreign body response by observing morphological changes and monitoring inflammatory cytokine production with multiplex quantitative protein analysis. While control monocultures of either cell type alone produced low levels of cytokines, their interactions in co-culture led to morphological changes and increased release of inflammatory cytokines. When challenged with a well-characterized biopolymer, poly(lactic-co-glycolic acid), the co-cultured human cells secreted elevated levels of IL-1β, IL-6, GM-CSF and TNF-α. This 3-D in vitro co-culture model may serve as a building block towards a versatile platform to study mechanisms of material-host interactions by co-culturing cells with engineered phenotypes and reporter systems, or predict patient-specific biocompatibility by using the individual patients' cells.
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Affiliation(s)
- Abigail C Parks
- Department of Bioengineering, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Kevin Sung
- Department of Bioengineering, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Benjamin M Wu
- Department of Bioengineering, University of California Los Angeles, Los Angeles, CA 90095, USA; Division of Advanced Prosthodontics and the Weintraub Center for Reconstructive Biotechnology, University of California Los Angeles, Los Angeles, CA 90095, USA.
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Ha HJ, Song JE, Kang Y, Kim EY, Yoon SJ, Yang YI, Lee D, Khang G. PORCINE SMALL INTESTINAL SUBMUCOSA REDUCES THE INFLAMMATORY REACTION OF POLY(LACTIDE-CO-GLYCOLIDE) FILMS. BIOMEDICAL ENGINEERING-APPLICATIONS BASIS COMMUNICATIONS 2014. [DOI: 10.4015/s101623721450032x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Poly(lactide-co-glycolide) (PLGA), a well-known synthetic polymer comprised of PLA and PGA, is used commonly as a scaffold for soft and hard tissue engineering purposes; however, the appropriate strategies for reducing its host tissue inflammatory response remain obscure. Porcine small intestinal submucosa (SIS) has been applied as a natural, biodegradable matrix for dressing materials, tendon graft substitutes and scaffolds. We hypothesized that the host tissue reaction of PLGA might occur but could be reduced by impregnating SIS into PLGA. We manufactured PLGA/SIS hybrid films with 0, 10, 20, 40 and 80 wt.% SIS of PLGA. The inflammatory potential of PLGA was evaluated using mRNA expression of TNF-α, IL-1β and IL-6 in the surrounding tissue of implanted scaffolds. The response of subcutaneously implanted PLGA/SIS films were compared to PLGA film; the local inflammatory response was observed by histology. PLGA/SIS films, especially PLGA/SIS films containing 20, 40 and 80 wt.% SIS, elicited a significantly lower expression of IL-1β, TNF-α and IL-6 than PLGA film. PLGA/SIS films demonstrated a favorable tissue response profile compared to PLGA film, with significant less inflammation and fibrous capsule formation as below only 20 wt.% of PLGA/SIS film during implantation. This study demonstrates reduced inflammatory response of PLGA by different amounts of SIS and PLGA/SIS scaffolds being used for tissue engineering constructs.
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Affiliation(s)
- Hyun Jung Ha
- Department of BIN Fusion Tech and Department of Advanced Organic Materials Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
| | - Jeong Eun Song
- Department of BIN Fusion Tech and Department of Advanced Organic Materials Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
| | - Yunmi Kang
- Department of BIN Fusion Tech and Department of Advanced Organic Materials Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
| | - Eun Young Kim
- Department of BIN Fusion Tech and Department of Advanced Organic Materials Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
| | - Sun Jung Yoon
- Department of Orthopedic Surgery, Chonbuk National University Hospital, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
| | - Young Il Yang
- Department of Pathology, School of Medicine, Inje University, Paik Inje Clinical Research, Pusan 614–735, Korea
| | - Dongwon Lee
- Department of BIN Fusion Tech and Department of Advanced Organic Materials Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
| | - Gilson Khang
- Department of BIN Fusion Tech and Department of Advanced Organic Materials Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin, Jeonju, 561–756, Korea
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Lopez-Donaire ML, Santerre JP. Surface modifying oligomers used to functionalize polymeric surfaces: Consideration of blood contact applications. J Appl Polym Sci 2014. [DOI: 10.1002/app.40328] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- M. Luisa Lopez-Donaire
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Ontario Canada
- Faculty of Dentistry; University of Toronto; Ontario M5G 1G6 Canada
| | - J. Paul Santerre
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Ontario Canada
- Faculty of Dentistry; University of Toronto; Ontario M5G 1G6 Canada
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Ahmed M, Ishihara K, Narain R. Calcium mediated formation of phosphorylcholine-based polyplexes for efficient knockdown of epidermal growth factor receptors (EGFR) in HeLa cells. Chem Commun (Camb) 2014; 50:2943-6. [DOI: 10.1039/c4cc00181h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Calcium mediated complexation of siRNA with phosphorylcholine based polymers for efficient gene knockdown in HeLa cells in the presence and absence of serum.
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Affiliation(s)
- Marya Ahmed
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton, Canada
| | - Kazuhiko Ishihara
- Department of Materials Engineering
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656, Japan
| | - Ravin Narain
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton, Canada
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Yin H, Akasaki T, Lin Sun T, Nakajima T, Kurokawa T, Nonoyama T, Taira T, Saruwatari Y, Ping Gong J. Double network hydrogels from polyzwitterions: high mechanical strength and excellent anti-biofouling properties. J Mater Chem B 2013; 1:3685-3693. [PMID: 32261266 DOI: 10.1039/c3tb20324g] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyzwitterionic materials, which have both cationic and anionic groups in the polymeric repeat unit, show excellent anti-biofouling properties and are drawing more attention in the biomedical field. In this study, we have successfully synthesized novel single network hydrogels and double network (DN) hydrogels from the zwitterionic monomer, N-(carboxymethyl)-N,N-dimethyl-2-(methacryloyloxy) ethanaminium, inner salt (CDME). The polyCDME (PCDME) single network hydrogel behaves like a hydrophilic neutral hydrogel and its properties are not sensitive to temperature, pH, or ionic strength over a wide range. DN hydrogels using the poly(2-acrylamido-2-methylpropanesulfonic) (PAMPS) as the first network and PCDME as the second network, having a Young's modulus of 0.2-0.9 MPa, possess excellent mechanical strength (fracture stress: 1.2-1.4 MPa, fracture strain: 2.2-6.0 mm/mm) and toughness (work of extension at fracture: 0.9-2.4 MJ m-3) depending on the composition ratio of PCDME to PAMPS. The strength and toughness of the optimized PAMPS/PCDME DN is comparable to the normal PAMPS/PAAm DN hydrogels that use poly(acrylamide) (PAAm) as the second network. By macrophage adhesion test, both the PCDME hydrogels and the PAMPS/PCDME DN hydrogels have shown excellent anti-biofouling properties. These results demonstrate that the PCDME-based DN hydrogels have high potential as a novel soft and wet biomaterial.
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Affiliation(s)
- Haiyan Yin
- Graduate School of Science, Hokkaido University, Sapporo, 060-0810, Japan
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Le X, Poinern GEJ, Ali N, Berry CM, Fawcett D. Engineering a biocompatible scaffold with either micrometre or nanometre scale surface topography for promoting protein adsorption and cellular response. Int J Biomater 2013; 2013:782549. [PMID: 23533416 PMCID: PMC3600176 DOI: 10.1155/2013/782549] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 11/02/2012] [Accepted: 12/13/2012] [Indexed: 11/18/2022] Open
Abstract
Surface topographical features on biomaterials, both at the submicrometre and nanometre scales, are known to influence the physicochemical interactions between biological processes involving proteins and cells. The nanometre-structured surface features tend to resemble the extracellular matrix, the natural environment in which cells live, communicate, and work together. It is believed that by engineering a well-defined nanometre scale surface topography, it should be possible to induce appropriate surface signals that can be used to manipulate cell function in a similar manner to the extracellular matrix. Therefore, there is a need to investigate, understand, and ultimately have the ability to produce tailor-made nanometre scale surface topographies with suitable surface chemistry to promote favourable biological interactions similar to those of the extracellular matrix. Recent advances in nanoscience and nanotechnology have produced many new nanomaterials and numerous manufacturing techniques that have the potential to significantly improve several fields such as biological sensing, cell culture technology, surgical implants, and medical devices. For these fields to progress, there is a definite need to develop a detailed understanding of the interaction between biological systems and fabricated surface structures at both the micrometre and nanometre scales.
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Affiliation(s)
- Xuan Le
- Murdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies and Nanotechnology, School of Engineering and Energy, Murdoch University, Murdoch, WA 6150, Australia
| | - Gérrard Eddy Jai Poinern
- Murdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies and Nanotechnology, School of Engineering and Energy, Murdoch University, Murdoch, WA 6150, Australia
| | - Nurshahidah Ali
- Murdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies and Nanotechnology, School of Engineering and Energy, Murdoch University, Murdoch, WA 6150, Australia
| | - Cassandra M. Berry
- Division of Health Sciences, School of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, WA 6150, Australia
| | - Derek Fawcett
- Murdoch Applied Nanotechnology Research Group, Department of Physics, Energy Studies and Nanotechnology, School of Engineering and Energy, Murdoch University, Murdoch, WA 6150, Australia
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Tang Z, Liu X, Luan Y, Liu W, Wu Z, Li D, Chen H. Regulation of fibrinolytic protein adsorption on polyurethane surfaces by modification with lysine-containing copolymers. Polym Chem 2013. [DOI: 10.1039/c3py00710c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Iwasaki Y, Ishihara K. Cell membrane-inspired phospholipid polymers for developing medical devices with excellent biointerfaces. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2012; 13:064101. [PMID: 27877525 PMCID: PMC5099758 DOI: 10.1088/1468-6996/13/6/064101] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 10/18/2012] [Accepted: 09/06/2012] [Indexed: 05/25/2023]
Abstract
This review article describes fundamental aspects of cell membrane-inspired phospholipid polymers and their usefulness in the development of medical devices. Since the early 1990s, polymers composed of 2-methacryloyloxyethyl phosphorylcholine (MPC) units have been considered in the preparation of biomaterials. MPC polymers can provide an artificial cell membrane structure at the surface and serve as excellent biointerfaces between artificial and biological systems. They have also been applied in the surface modification of some medical devices including long-term implantable artificial organs. An MPC polymer biointerface can suppress unfavorable biological reactions such as protein adsorption and cell adhesion - in other words, specific biomolecules immobilized on an MPC polymer surface retain their original functions. MPC polymers are also being increasingly used for creating biointerfaces with artificial cell membrane structures.
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Affiliation(s)
- Yasuhiko Iwasaki
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka, 564–8680, Japan
| | - Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8656, Japan
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Hong Y, Ye SH, Pelinescu AL, Wagner WR. Synthesis, characterization, and paclitaxel release from a biodegradable, elastomeric, poly(ester urethane)urea bearing phosphorylcholine groups for reduced thrombogenicity. Biomacromolecules 2012; 13:3686-94. [PMID: 23035885 DOI: 10.1021/bm301158j] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Biodegradable polymers with high elasticity, low thrombogenicity, and drug loading capacity continue to be pursued for vascular engineering applications, including vascular grafts and stents. A biodegradable elastomeric polyurethane was designed as a candidate material for use as a drug-eluting stent coating, such that it was nonthrombogenic and could provide antiproliferative drug release to inhibit smooth muscle cell proliferation. A phosphorylcholine containing poly(ester urethane) urea (PEUU-PC) was synthesized by grafting aminated phosphorylcholine onto backbone carboxyl groups of a polyurethane (PEUU-COOH) synthesized from a soft segment blend of polycaprolactone and dimethylolpropionic acid, a hard segment of diisocyanatobutane and a putrescine chain extender. Poly(ester urethane) urea (PEUU) from a soft segment of polycaprolactone alone was employed as a control material. All of the synthesized polyurethanes showed high distensibility (>600%) and tensile strengths in the 20-35 MPa range. PEUU-PC experienced greater degradation than PEUU or PEUU-COOH in either a saline or lipase enzyme solution. PEUU-PC also exhibited markedly inhibited ovine blood platelet deposition compared with PEUU-COOH and PEUU. Paclitaxel loaded in all of the polymers during solvent casting continued to release for 5 d after a burst release in a 10% ethanol/PBS solution, which was utilized to increase the solubility of the releasate. Rat smooth muscle cell proliferation was significantly inhibited in 1 wk cell culture when releasate from the paclitaxel-loaded films was present. Based on these results, the synthesized PEUU-PC has promising functionality for use as a nonthrombogenic, drug eluting coating on metallic vascular stents and grafts.
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Affiliation(s)
- Yi Hong
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Lee Y, Kwon J, Khang G, Lee D. Reduction of inflammatory responses and enhancement of extracellular matrix formation by vanillin-incorporated poly(lactic-co-glycolic acid) scaffolds. Tissue Eng Part A 2012; 18:1967-78. [PMID: 22551555 DOI: 10.1089/ten.tea.2012.0001] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Vanillin is one of the major components of vanilla, a commonly used flavoring agent and preservative and is known to exert potent antioxidant and anti-inflammatory activities. In this work, vanillin-incorporated poly(lactic-co-glycolic acid) (PLGA) films and scaffolds were fabricated to evaluate the effects of vanillin on the inflammatory responses and extracellular matrix (ECM) formation in vitro and in vivo. The incorporation of vanillin to PLGA films induced hydrophilic nature, resulting in the higher cell attachment and proliferation than the pure PLGA film. Vanillin also reduced the generation of reactive oxygen species (ROS) in cells cultured on the pure PLGA film and significantly inhibited the PLGA-induced inflammatory responses in vivo, evidenced by the reduced accumulation of inflammatory cells and thinner fibrous capsules. The effects of vanillin on the ECM formation were evaluated using annulus fibrous (AF) cell-seeded porous PLGA/vanillin scaffolds. PLGA/vanillin scaffolds elicited the more production of glycosaminoglycan and collagen than the pure PLGA scaffold, in a concentration-dependent manner. Based on the low level of inflammatory responses and enhanced ECM formation, vanillin-incorporated PLGA constructs make them promising candidates in the future biomedical applications.
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Affiliation(s)
- Yujung Lee
- Polymer Fusion Research Center, Department of Polymer·Nano Science and Technology, Chonbuk National University, Jeonju, Republic of Korea
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Xu Y, Dong A, Zhao Y, Zhang T, Jiang Z, Wang S, Chen H. Synthesis, Characterization and Biomedical Properties of UV-Cured Polyurethane Acrylates Containing a Phosphorylcholine Structure. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:2089-104. [DOI: 10.1163/092050611x610315] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Yihui Xu
- a Department of Materials Science and Engineering , College of Engineering and Applied Sciences, Nanjing University , Nanjing , 210093 , P. R. China
| | - Anxin Dong
- a Department of Materials Science and Engineering , College of Engineering and Applied Sciences, Nanjing University , Nanjing , 210093 , P. R. China
| | - Yufeng Zhao
- a Department of Materials Science and Engineering , College of Engineering and Applied Sciences, Nanjing University , Nanjing , 210093 , P. R. China
| | - Tao Zhang
- a Department of Materials Science and Engineering , College of Engineering and Applied Sciences, Nanjing University , Nanjing , 210093 , P. R. China
| | - Zhengsheng Jiang
- b Department of Physics , Nanjing University , Nanjing , 210093 , P. R. China
| | - Shasha Wang
- c College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou , 215123 , P. R. China
| | - Hong Chen
- c College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou , 215123 , P. R. China
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Kadowaki K, Matsusaki M, Akashi M. Control of Cellular Inflammation by Layer-by-layer Nanofilms through Different Driving Forces. CHEM LETT 2012. [DOI: 10.1246/cl.2012.523] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Koji Kadowaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Michiya Matsusaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST)
| | - Mitsuru Akashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
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Khandwekar A, Rho CK. Modulation of cellular responses on engineered polyurethane implants. J Biomed Mater Res A 2012; 100:2211-22. [PMID: 22492665 DOI: 10.1002/jbm.a.34146] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 01/30/2012] [Accepted: 02/09/2012] [Indexed: 12/18/2022]
Abstract
An in vivo rat cage implant system was used to study the effect of polyurethane surface chemistries on protein adsorption, macrophage adhesion, foreign-body giant cell formation (FBGCs), cellular apoptosis, and cytokine response. Polyurethanes with zwitterionic, anionic, and cationic chemistries were developed. The changes in the surface topography of the materials were determined using atomic force microscopy and the wettability by dynamic contact angle measurements. The in vitro protein adsorption studies revealed higher protein adsorption on cationic surfaces when compared with the base, while adsorption was significantly reduced on zwitterionic (**p < 0.01) and anionic (*p < 0.05) polyurethanes. Analysis of the exudates surrounding the materials revealed no differences between surfaces in the types or levels of cells present. Conversely, the proportion of adherent cells undergoing apoptosis, as determined by annexin V-FITC staining, increased significantly on anionic followed by zwitterionic surfaces (60 + 5.0 and 38 + 3.7%) when compared with the base. Additionally, zwitterionic and anionic substrates provided decreased rates of macrophage adhesion and fusion into FBGCs, whereas cationic surfaces promoted macrophage adhesion and FBGC formation. Visualization of the F-actin cytoskeleton by Alexa Fluor 488 phalloidin showed a significant delay in the cytoskeletal fusion response on zwitterionic and the anionic surfaces. The real-time polymerase chain reaction (PCR) analysis of proinflammatory cytokines (tumor necrosis factor (TNF)-α and interleukin (IL)-10) and pro-wound healing cytokines (IL-4 and TGF-β) revealed differential cytokine responses. Cationic substrates that triggered stimulation of TNF-α and IL-4 were associated with more spread cells and higher FBGCs, whereas zwitterionic and anionic substrates that suppressed these cytokines levels were associated with less spread cells and few FBGCs. These studies have revealed that zwitterionic and anionic polyurethane surface chemistries can not only reduce nonspecific adhesion, fusion, and inflammatory events but also effectively promote cellular apoptosis in vivo.
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Affiliation(s)
- Anand Khandwekar
- Department of Bioengineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
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Ye SH, Watanabe J, Ishihara K. Cellulose acetate hollow fiber membranes blended with phospholipid polymer and their performance for hemopurification. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 15:981-1001. [PMID: 15461185 DOI: 10.1163/1568562041526450] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Commercially available hollow fiber membranes (HFMs) made from synthetic polymers, including cellulose acetate (CA) HFMs, used as hemopurification membranes, need to improve in hemocompatibility, by suppressing protein adsorption and clot formation. In this study, CA HFMs blended with 2-methacryloyloxyethyl phosphorylcholine (MPC) copolymer (PMB30 composed of MPC and n-butyl methacrylate (BMA)) were prepared by a dry-jet wet spinning process. Their performances were evaluated by characterizing their properties such as structure, permeability and protein adsorption. CA/PMB30-blend HFMs showed structure changes such as increase of porosity, development of large pores and decreasing of the thickness of the active layer. And the structure and permeability of CA/PMB30-blend HFMs were controllable by changing preparation conditions. Also, the CA/PMB30-blend HFMs had good permeability, low protein adsorption and low fouling property during the permeability experiment in comparison with CA HFMs, because the hydrophilic and hemocompatible MPC copolymer (PMB30) existed on the surface of the HFM.
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Affiliation(s)
- Sang Ho Ye
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Khang G. Importance of inflammation reaction of scaffold for the application of regenerative medicine. Inflamm Regen 2012. [DOI: 10.2492/inflammregen.32.178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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In vitro degradation rate of apatitic calcium phosphate cement with incorporated PLGA microspheres. Acta Biomater 2011; 7:3459-68. [PMID: 21689794 DOI: 10.1016/j.actbio.2011.05.036] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 05/24/2011] [Accepted: 05/31/2011] [Indexed: 11/23/2022]
Abstract
Calcium phosphate cements (CPCs) are frequently used as bone substitute material. Despite their superior clinical handling and excellent biocompatibility, they exhibit poor degradability, which limits bone ingrowth into the implant. Microspheres were prepared from poly(d,l-lactic-co-glycolic acid) (PLGA) and included in injectable CPCs as porogens in order to enhance its macroporosity after the polymeric microspheres had degraded. Upon degradation of the PLGA microspheres, acid is produced that enhances the dissolution rate of the CPC. However, the effect of the characteristics of PLGA microspheres on the degradation rate of CPCs has never been studied before. Therefore, the purpose of the current study was to investigate the dependence of CPC degradation on the chemical and morphological characteristics of incorporated PLGA microspheres. With respect to the chemical characteristics of the PLGA microspheres, the effects of both PLGA molecular weight (5, 17 and 44kDa) and end-group functionalization (acid-terminated or end-capped) were studied. In addition, two types of PLGA microspheres, differing in morphology (hollow vs. dense), were tested. The results revealed that, although both chemical parameters clearly affected the polymer degradation rate when embedded as hollow microspheres in CPC, the PLGA and CPC degradation rates were mainly dependent on the end-group functionalization. Moreover, it was concluded that dense microspheres were more efficient porogens than hollow ones by increasing the CPC macroporosity during in vitro incubation. By combining all test parameters, it was concluded that dense PLGA microspheres consisting of acid-terminated PLGA of 17kDa exhibited the highest and fastest acid-producing capacity and correspondingly the highest and fastest amount of porosity. In conclusion, the data presented here indicate that the combination of dense, acid-terminated PLGA microspheres with CPC emerges as a successful combination to achieve enhanced apatitic CPC degradation.
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Cytotoxicity assays of new artificial tears containing 2-methacryloyloxyethyl phosphorylcholine polymer for ocular surface cells. Jpn J Ophthalmol 2011; 55:541-546. [PMID: 21830058 DOI: 10.1007/s10384-011-0073-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 05/23/2011] [Indexed: 12/18/2022]
Abstract
PURPOSE 2-Methacryloyloxyethyl phosphorylcholine (MPC) polymer is a multifunctional agent with antiadhesive, antithrombogenetic, and strong hydrating properties. MPC polymer-containing eye drops are the first such ophthalmic product to be commercially available; they contain approximately 0.1% Lipidure-PMB (copolymer of MPC and butyl methacrylate; NOF Corporation, Tokyo, Japan). This study evaluated the cytotoxicity of this new product toward ocular surface cells. METHODS SIRC (rabbit cornea), BCE C/D-1b (bovine cornea), RC-1 (rabbit cornea), and Chang (human conjunctiva) cell lines were tested in this study. Cell viability was measured using both the MTT assay and the neutral red test in cells treated for 10, 30, or 60 min with MPC-containing eye drops and 4 commercial ophthalmic solutions containing sodium hyaluronate (SH) at various doses (undiluted, twofold diluted, and tenfold diluted). Cell viability scores were calculated. Cell viability was analyzed using ANOVA and the Dunnett test. RESULTS After treatment with the MPC eye drops, cell viability rates were maintained at over 80% irrespective of the cell lines, dilution rates, exposure times, and assays, and were similar to those of the clinically approved artificial tear products other than Hyalein 0.1%, although some significant differences were found. CONCLUSIONS The MPC eye drops were tolerable to ocular surface cells, and comparable to single doses of clinically approved drugs containing sodium hyaluronate.
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