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Shiojima T, Inoue Y, Kyomoto M, Ishihara K. High-efficiency preparation of poly(2-methacryloyloxyethyl phosphorylcholine) grafting layer on poly(ether ether ketone) by photoinduced and self-initiated graft polymerization in an aqueous solution in the presence of inorganic salt additives. Acta Biomater 2016; 40:38-45. [PMID: 27154499 DOI: 10.1016/j.actbio.2016.05.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 04/29/2016] [Accepted: 05/02/2016] [Indexed: 11/24/2022]
Abstract
UNLABELLED A highly efficient methodology for preparing a poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) layer on the surface of poly(ether ether ketone) (PEEK) was examined by photoinduced and self-initiated graft polymerization. To enhance the polymerization rate, we demonstrated the effects of inorganic salt additives in the feed monomer solution on thickness of grafted PMPC layer. Photoinduced polymerization occurred and the PMPC graft layer was successfully formed on the PEEK surface, regardless of inorganic salt additives. Moreover, it was clearly observed that the addition of inorganic salt enhanced the grafting thickness of PMPC layer on the surface even when the photoirradiation time was shortened. The addition of inorganic salt additives in the feed monomer solution enhanced the polymerization rate of MPC and resulted in thicker PMPC layers. In particular, we evaluated the effect of NaCl concentration and how this affected the polymerization rate and layer thickness. We considered that this phenomenon was due to the hydration of ions in the feed monomer solution and subsequent apparent increase in the MPC concentration. A PMPC layer with over 100-nm-thick, which was prepared by 5-min photoirradiation in 2.5mol/L inorganic salt aqueous solution, showed good wettability and protein adsorption resistance compared to that of untreated PEEK. Hence, we concluded that the addition of NaCl into the MPC feed solution would be a convenient and efficient method for preparing a graft layer on PEEK. STATEMENT OF SIGNIFICANCE Photoinduced and self-initiated graft polymerization on the PEEK surface is one of the several methodologies available for functionalization. However, in comparison with free-radical polymerization, the efficiency of polymerization at the solid-liquid interface is limited. Enhancement of the polymerization rate for grafting could solve the problem. In this study, we observed the acceleration of the polymerization rate of MPC in an aqueous solution by the addition of inorganic salt. The salt itself did not show any adverse effects on the radical polymerization; however, the apparent concentration of the monomer in feed may be increased due to the hydration of ions attributed to salt additives. We could obtain PMPC-grafted PEEK with sufficient PMPC thickness to obtain good functionality with only 5-min photoirradiation by using 2.5mol/L NaCl in the feed solution.
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Ishihara K, Inoue Y, Kyomoto M. Surface Modification on Poly(ether ether ketone) with Phospholipid Polymer via Photoinduced Self-Initiated Grafting. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/masy.201400098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
- Department of Bioengineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Yuuki Inoue
- Department of Materials Engineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
| | - Masayuki Kyomoto
- Department of Materials Engineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
- Division of Science for Joint Reconstruction, Graduate School of Medicine; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
- Research Department; KYOCERA Medical Corporation; 3-3-31 Miyahara Yodogawa-ku Osaka 532-0003 Japan
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Lin X, Fukazawa K, Ishihara K. Photoreactive Polymers Bearing a Zwitterionic Phosphorylcholine Group for Surface Modification of Biomaterials. ACS APPLIED MATERIALS & INTERFACES 2015; 7:17489-17498. [PMID: 26202385 DOI: 10.1021/acsami.5b05193] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Photoreactive polymers bearing zwitterionic phosphorylcholine and benzophenone groups on the side chain were synthesized and used as surface modification reagents for biomaterials. A photoreactive methacrylate containing the benzophenone group, 3-methacryloyloxy-2-hydroxypropyl-4-oxybenzophenone (MHPBP), was synthesized via a ring-opening and addition reaction between glycidyl methacrylate and 4-hydroxybenzophenone. Then, water-soluble, amphiphilic polymers poly(2-methacryloyloxyethyl phosphorylcholine (MPC)-co-MHPBP) (PMH) and poly(MPC-co-n-butyl methacrylate-co-MHPBP), with different monomer unit compositions, were synthesized through radical polymerization. Ultraviolet-visible (UV/vis) absorption spectra of these polymer solutions showed that these polymers have maximum absorption peaks at 254 and 289 nm that can be attributed to the benzophenone unit. The intensity of UV adsorption at 289 nm was decreased with increased UV irradiation time, and it was saturated within a few minutes, indicating that the polymers are highly sensitive to UV irradiation. A commercial material (i.e., cyclic polyolefin) was simply modified by a UV irradiation for 1.0 min. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis results indicated that the stability of the polymer on the surface was dramatically enhanced because of the photochemical reaction of the benzophenone moiety. The air contact angles of PMH surfaces measured in water were up to 160°. Thus, highly hydrophilic surfaces were obtained. The critical surface tension of the PMH-modified surface was 45.7 mN/m. By evaluating the biological reactivity of the treated surface, protein adsorption and cell adhesion were completely inhibited on the surface, which was prepared using a photopatterning procedure using PMH. In conclusion, photoreactive MPC polymers with a benzophenone moiety could be used as a novel and effective surface modifier.
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Affiliation(s)
- Xiaojie Lin
- †Department of Materials Engineering and ‡Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kyoko Fukazawa
- †Department of Materials Engineering and ‡Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazuhiko Ishihara
- †Department of Materials Engineering and ‡Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Yamane S, Kyomoto M, Moro T, Watanabe K, Hashimoto M, Takatori Y, Tanaka S, Ishihara K. Effects of extra irradiation on surface and bulk properties of PMPC-grafted cross-linked polyethylene. J Biomed Mater Res A 2015; 104:37-47. [PMID: 26148654 DOI: 10.1002/jbm.a.35538] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 06/18/2015] [Accepted: 06/30/2015] [Indexed: 11/06/2022]
Abstract
Sterilization using high-energy irradiation is an important aspect of implementing an ultra-high molecular weight polyethylene acetabular liner in total hip arthroplasty (THA). In this study, we evaluate the effects of extra irradiations such as gamma-ray or plasma irradiation during sterilization of the poly(2-methacryloyloxyethyl phosphorylcholine [MPC]) (PMPC) surface and cross-linked polyethylene (CLPE) substrate of a PMPC-grafted CLPE acetabular liner. The PMPC-grafted surface yielded high wettability and low friction properties regardless of the extra irradiations as compared with untreated CLPE. During a hip simulator test, wear resistance of the PMPC-grafted CLPE liner was maintained after extra irradiation, which is due to the high wettability characteristics of the PMPC surface. In particular, the PMPC-grafted CLPE liner treated with plasma irradiation showed greater wettability and wear resistance than that with gamma-ray irradiation. However, we could not clearly observe the changes in chemical properties and morphology of the PMPC surface after both extra irradiations. The physical and mechanical properties attributed to CLPE substrate performance were also unchanged. In contrast, PMPC-grafted CLPE treated with plasma irradiation showed improved oxidation resistance as compared to that treated with gamma-ray irradiation after accelerated aging. Thus, we conclude that PMPC-grafted CLPE with plasma irradiation has promise as a lifelong solution for bearing in THA.
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Affiliation(s)
- Shihori Yamane
- Department of Materials Engineering, School of Engineering, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8656, Japan.,Division of Science for Joint Reconstruction, Graduate School of Medicine, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.,Research Department, KYOCERA Medical Corporation, 3-3-31, Miyahara, Yodogawa-Ku, Osaka, 532-0003, Japan
| | - Masayuki Kyomoto
- Department of Materials Engineering, School of Engineering, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8656, Japan.,Division of Science for Joint Reconstruction, Graduate School of Medicine, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.,Research Department, KYOCERA Medical Corporation, 3-3-31, Miyahara, Yodogawa-Ku, Osaka, 532-0003, Japan
| | - Toru Moro
- Division of Science for Joint Reconstruction, Graduate School of Medicine, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Kenichi Watanabe
- Division of Science for Joint Reconstruction, Graduate School of Medicine, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.,Research Department, KYOCERA Medical Corporation, 3-3-31, Miyahara, Yodogawa-Ku, Osaka, 532-0003, Japan
| | - Masami Hashimoto
- Materials Research and Development Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta-Ku, Nagoya, 456-8587, Japan
| | - Yoshio Takatori
- Division of Science for Joint Reconstruction, Graduate School of Medicine, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan
| | - Sakae Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, the University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, 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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Ishihara K. Highly lubricated polymer interfaces for advanced artificial hip joints through biomimetic design. Polym J 2015. [DOI: 10.1038/pj.2015.45] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Zhang N, Ma J, Melo MAS, Weir MD, Bai Y, Xu HHK. Protein-repellent and antibacterial dental composite to inhibit biofilms and caries. J Dent 2014; 43:225-34. [PMID: 25478889 DOI: 10.1016/j.jdent.2014.11.008] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 11/24/2014] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVES Biofilm acids contribute to secondary caries, which is a main reason for dental restoration failures. The objectives of this study were to: (1) develop a protein-repellent and antibacterial composite, and (2) investigate the effects of combining 2-methacryloyloxyethyl phosphorylcholine (MPC) with quaternary ammonium dimethylaminohexadecyl methacrylate (DMAHDM) on composite mechanical properties and biofilm response for the first time. METHODS MPC, DMAHDM and glass particles were mixed into a dental resin composite. Mechanical properties were measured in three-point flexure. Protein adsorption onto the composites was measured by a micro bicinchoninic acid method. A human saliva microcosm model was used to grow biofilms on composites. Colony-forming unit (CFU) counts, live/dead assay, metabolic activity, and lactic acid production of biofilms were determined. RESULTS Incorporation of 3% MPC and 1.5% DMAHDM into composite achieved protein-repellent and antibacterial capabilities without compromising the mechanical properties. Composite with 3% MPC+1.5% DMAHDM had protein adsorption that was 1/10 that of a commercial composite (p<0.05). The composite with 3% MPC+1.5% DMAHDM had much greater reduction in biofilm growth than using MPC or DMAHDM alone (p<0.05). Biofilm CFU counts on composite with 3% MPC+1.5% DMAHDM were more than three orders of magnitude lower than that of commercial control. CONCLUSIONS Dental composite with a combination of strong protein-repellent and antibacterial capabilities was developed for the first time. Composite containing MPC and DMAHDM greatly reduced biofilm growth and lactic acid production, without compromising mechanical properties of the composite. CLINICAL SIGNIFICANCE Novel composite with MPC and DMAHDM greatly reduced biofilm activity and is promising to inhibit secondary caries. The dual agents of MPC plus DMAHDM may have wide applicability to other dental materials.
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Affiliation(s)
- Ning Zhang
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA; Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Jianfeng Ma
- School & Hospital of Stomatology, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Mary A S Melo
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Michael D Weir
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
| | - Yuxing Bai
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China.
| | - Hockin H K Xu
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA; Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Mechanical Engineering, University of Maryland, Baltimore County, MD 21250, USA.
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Yousaf A, Farrukh A, Oluz Z, Tuncel E, Duran H, Doğan SY, Tekinay T, Rehman HU, Yameen B. UV-light assisted single step route to functional PEEK surfaces. REACT FUNCT POLYM 2014. [DOI: 10.1016/j.reactfunctpolym.2014.07.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gao H, Zhang J, Liu F, Ao Z, Liu S, Zhu S, Han D, Yang B. Fabrication of polyaniline nanofiber arrays on poly(etheretherketone) to induce enhanced biocompatibility and controlled behaviours of mesenchymal stem cells. J Mater Chem B 2014; 2:7192-7200. [DOI: 10.1039/c4tb01081g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Yu K, Mei Y, Hadjesfandiari N, Kizhakkedathu JN. Engineering biomaterials surfaces to modulate the host response. Colloids Surf B Biointerfaces 2014; 124:69-79. [PMID: 25193153 DOI: 10.1016/j.colsurfb.2014.08.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 07/29/2014] [Accepted: 08/09/2014] [Indexed: 12/16/2022]
Abstract
Undesirable host response is responsible for the surface induced thrombus generation, activation of the complement system and the inflammatory reactions by the blood-contacting biomaterials. The surface interaction of biomaterials with different blood components is thought to be the critical factor that dictates the host response to biomaterials. Surface engineering can be utilized as a method to enhance the biocompatibility and tailor the biological response to biomaterials. This review provides a brief account of various polymer brush based approaches used for biomaterials surface modification, both passive and bioactive, to make the material surfaces biocompatible and antibacterial. Initially we discuss the utilization of polymer brushes with different structure and chemistry as a novel strategy to design the surface non-fouling that passively prevent the subsequent biological responses. Further we explore the utility of different bioactive agents including peptides, carbohydrates and proteins which can be conjugated the polymer brush to make the surface actively interact with the body and modulate the host response. A number of such avenues have also been explored in this review.
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Affiliation(s)
- Kai Yu
- Centre for Blood Research, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada; Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Yan Mei
- Centre for Blood Research, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada; Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Narges Hadjesfandiari
- Centre for Blood Research, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada; Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Jayachandran N Kizhakkedathu
- Centre for Blood Research, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada; Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada; Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6 T 1Z3, Canada.
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Enomoto R, Sato M, Fujii S, Hirai T, Takahara A, Ishihara K, Yusa SI. Surface patterned graft copolymerization of hydrophilic monomers onto hydrophobic polymer film upon UV irradiation. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27308] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ryusuke Enomoto
- Department of Materials Science and Chemistry; Graduate School of Engineering, University of Hyogo; 2167 Shosha, Himeji Hyogo 671-2280 Japan
| | - Masanao Sato
- Graduate School of Engineering, Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Shota Fujii
- Graduate School of Engineering, Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Tomoyasu Hirai
- Graduate School of Engineering, Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Atsushi Takahara
- Graduate School of Engineering, Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Kazuhiko Ishihara
- Department of Materials Engineering; School of Engineering, The University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Shin-ichi Yusa
- Department of Materials Science and Chemistry; Graduate School of Engineering, University of Hyogo; 2167 Shosha, Himeji Hyogo 671-2280 Japan
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Kawasaki Y, Iwasaki Y. Surface modification of poly(ether ether ketone) with methacryloyl-functionalized phospholipid polymers via self-initiation graft polymerization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:895-906. [DOI: 10.1080/09205063.2014.911570] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Takahashi N, Iwasa F, Inoue Y, Morisaki H, Ishihara K, Baba K. Evaluation of the durability and antiadhesive action of 2-methacryloyloxyethyl phosphorylcholine grafting on an acrylic resin denture base material. J Prosthet Dent 2014; 112:194-203. [PMID: 24461942 DOI: 10.1016/j.prosdent.2013.08.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 08/22/2013] [Accepted: 08/22/2013] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM The polymer 2-methacryloyloxyethyl phosphorylcholine is currently used on medical devices to prevent infection. Denture plaque-associated infection is regarded as a source of serious dental and medical complications in the elderly population, and denture hygiene, therefore, is an issue of considerable importance for denture wearers. Furthermore, because denture bases are exposed to mechanical stresses, for example, denture brushing, the durability of the coating is important for retaining the antiadhesive function of 2-methacryloyloxyethyl phosphorylcholine. PURPOSE The purpose of this study is to investigate the durability and antiadhesive activity of two 2-methacryloyloxyethyl phosphorylcholine polymer coating techniques: poly-2-methacryloyloxyethyl phosphorylcholine grafting and poly-2-methacryloyloxyethyl phosphorylcholine-co-n-butyl methacrylate coating. It was revealed that 2-methacryloyloxyethyl phosphorylcholine polymer coating of the denture base resin polymethyl methacrylate decreases bacterial biofilm formation. MATERIAL AND METHODS Durability was examined by rhodamine staining and elemental surface analysis and by determining the wetting properties of the 2-methacryloyloxyethyl phosphorylcholine polymer-modified polymethyl methacrylate after a friction test that comprised 500 brushing cycles. Antiadhesive activity was examined by using a Streptococcus mutans biofilm formation assay. RESULTS Poly-2-methacryloyloxyethyl phosphorylcholine-grafted polymethyl methacrylate retained 2-methacryloyloxyethyl phosphorylcholine units and antiadhesive activity even after repetitive mechanical stress, whereas co-n-butyl methacrylate-coated polymethyl methacrylate did not. CONCLUSION These results demonstrated that graft polymerization of 2-methacryloyloxyethyl phosphorylcholine on denture surfaces may contribute to the durability of the coating and prevent microbial retention.
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Affiliation(s)
- Nana Takahashi
- Assistant Professor, Department of Prosthodontics, School of Dentistry, Showa University, Tokyo, Japan
| | - Fuminori Iwasa
- Lecturer, Department of Prosthodontics, School of Dentistry, Showa University, Tokyo, Japan
| | - Yuuki Inoue
- Assistant Professor, Department of Materials Engineering, School of Engineering, University of Tokyo, Tokyo, Japan
| | - Hirobumi Morisaki
- Lecturer, Department of Oral Microbiology, School of Dentistry, Showa University, Tokyo, Japan
| | - Kazuhiko Ishihara
- Professor, Department of Materials Engineering, School of Engineering, University of Tokyo, Tokyo, Japan
| | - Kazuyoshi Baba
- Professor and Chair, Department of Prosthodontics, School of Dentistry, Showa University, Tokyo, Japan
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Song L, Zhao J, Luan S, Ma J, Liu J, Xu X, Yin J. Fabrication of a detection platform with boronic-acid-containing zwitterionic polymer brush. ACS APPLIED MATERIALS & INTERFACES 2013; 5:13207-13215. [PMID: 24299274 DOI: 10.1021/am404206v] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Development of technologies for biomedical detection platform is critical to meet the global challenges of various disease diagnoses, especially for point-of-use applications. Because of its natural simplicity, effectiveness, and easy repeatability, random covalent-binding technique is widely adopted in antibody immobilization. However, its antigen-binding capacity is relatively low when compared to site-specific immobilization of antibody. Herein, we report that a detection platform modified with boronic acid (BA)-containing sulfobetaine-based polymer brush. Mainly because of the advantage of oriented immobilization of antibody endowed with BA-containing three-dimensional polymer brush architecture, the platform had a high antigen-binding capacity. Notably, nonspecific protein adsorption was also suppressed by the zwitterionic pendants, thus greatly enhanced signal-to-noise (S/N) values for antigen recognition. Furthermore, antibodies captured by BA pendants could be released in dissociation media. This new platform is promising for potential applications in immunoassays.
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Affiliation(s)
- Lingjie Song
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
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Poly(ether-ether-ketone) orthopedic bearing surface modified by self-initiated surface grafting of poly(2-methacryloyloxyethyl phosphorylcholine). Biomaterials 2013; 34:7829-39. [DOI: 10.1016/j.biomaterials.2013.07.023] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 07/06/2013] [Indexed: 12/20/2022]
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Tateishi T, Kyomoto M, Kakinoki S, Yamaoka T, Ishihara K. Reduced platelets and bacteria adhesion on poly(ether ether ketone) by photoinduced and self-initiated graft polymerization of 2-methacryloyloxyethyl phosphorylcholine. J Biomed Mater Res A 2013; 102:1342-9. [PMID: 23720384 DOI: 10.1002/jbm.a.34809] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 05/14/2013] [Accepted: 05/16/2013] [Indexed: 11/06/2022]
Abstract
Aromatic poly(ether ether ketone) (PEEK) is a super engineering plastic, which has good mechanical properties and is resistant to physical and chemical stimuli. We have, therefore, attempted to use PEEK in cardiovascular devices. Synthetic cardiovascular devices require both high hemocompatibility and anti-inflammatory activity in addition to the mechanical properties. We modified the PEEK surface by photoinduced and self-initiated graft polymerization with 2-methacryloyloxyethyl phosphorylcholine (MPC; PMPC-grafted PEEK) for obtaining good antithrombogenicity. Polymerization was carried out on the surface of PEEK under radiation of ultraviolet (UV) light during which we controlled monomer concentrations, temperatures, and UV intensities. The biological performance of the PMPC-grafted PEEK was examined and compared with that of unmodified PEEK. With increase in the thickness of the PMPC layer, the amount of fibrinogen adsorption decreased significantly in comparison to that in the case of unmodified PEEK. When placed in contact with human platelet-rich plasma, surface of the PMPC-grafted PEEK clearly showed inhibition of platelet adhesion and activation. Also, bacterial adhesion was reduced dramatically on the PMPC-grafted PEEK. Thus, the PMPC grafting on PEEK improved the antithrombogenicity.
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Affiliation(s)
- Takaharu Tateishi
- Department of Materials Engineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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Ye W, Shi Q, Wong SC, Hou J, Shi H, Yin J. Patterning Surfaces for Controlled Platelet Adhesion and Detection of Dysfunctional Platelets. Macromol Biosci 2013; 13:676-81. [DOI: 10.1002/mabi.201200463] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 02/07/2013] [Indexed: 11/09/2022]
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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: 208] [Impact Index Per Article: 17.3] [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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68
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Sun XY, Yu SS, Wan JQ, Chen KZ. Facile graft of poly(2-methacryloyloxyethyl phosphorylcholine) onto Fe3O4nanoparticles by ATRP: Synthesis, properties, and biocompatibility. J Biomed Mater Res A 2012; 101:607-12. [DOI: 10.1002/jbm.a.34343] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 05/08/2012] [Accepted: 06/26/2012] [Indexed: 12/19/2022]
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69
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Iwasaki Y, Matsumoto A, Yusa SI. Optimized molecular structure of photoreactive biocompatible block copolymers for surface modification of metal substrates. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3254-3260. [PMID: 22639819 DOI: 10.1021/am3006065] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Poly(2-methacryloyloxyethyl phosphorylcholine)-b-poly(2-methacryloyloxyethyl phosphate-co-2-cinnamoyloxyethyl methacrylate) (PMPC-b-P(MPA/CMA)) was prepared by reversible addition-fragmentation chain transfer (RAFT)-controlled radical polymerization. The block copolymers were coated on stainless steel (SUS316L) and other metal substrates, and then the surface was subsequently irradiated with UV light. The wettability of a specimen surface treated with a block copolymer was improved in comparison with that of an untreated SUS316L plate. From X-ray photoelectron spectroscopy (XPS) data, it was clear that the P(MPA/CMA) block worked as a binding site on the SUS316L surface. The surface density of the block copolymer-immobilized SUS316L surface was influenced by the molecular weight of the PMPC block. The stability of the immobilized layer was improved by UV irradiation, which induced intermolecular dimerization of the CMA. In addition to the SUS316L surface, various other metal surfaces could be modified by surface immobilization of block copolymers. Serum protein adsorption and fibroblast adhesion were effectively reduced by surface immobilization of block copolymers with optimal molecular weight of PMPC block. The nonfouling property was preserved after 1 week of cell cultivation.
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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
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70
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Surface modification of poly(styrene-b-(ethylene-co-butylene)-b-styrene) elastomer via UV-induced graft polymerization of N-vinyl pyrrolidone. Colloids Surf B Biointerfaces 2012; 93:127-34. [DOI: 10.1016/j.colsurfb.2011.12.027] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 12/05/2011] [Accepted: 12/21/2011] [Indexed: 11/23/2022]
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71
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Kyomoto M, Moro T, Saiga K, Hashimoto M, Ito H, Kawaguchi H, Takatori Y, Ishihara K. Biomimetic hydration lubrication with various polyelectrolyte layers on cross-linked polyethylene orthopedic bearing materials. Biomaterials 2012; 33:4451-9. [PMID: 22465336 DOI: 10.1016/j.biomaterials.2012.03.028] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Accepted: 03/07/2012] [Indexed: 12/01/2022]
Abstract
Natural joints rely on fluid thin-film lubrication by the hydrated polyelectrolyte layer of cartilage. However, current artificial joints with polyethylene (PE) surfaces have considerably less efficient lubrication and thus much greater wear, leading to osteolysis and aseptic loosening. This is considered a common factor limiting prosthetic longevity in total hip arthroplasty (THA). However, such wear could be mitigated by surface modification to mimic the role of cartilage. Here we report the development of nanometer-scale hydrophilic layers with varying charge (nonionic, cationic, anionic, or zwitterionic) on cross-linked PE (CLPE) surfaces, which could fully mimic the hydrophilicity and lubricity of the natural joint surface. We present evidence to support two lubrication mechanisms: the primary mechanism is due to the high level of hydration in the grafted layer, where water molecules act as very efficient lubricants; and the secondary mechanism is repulsion of protein molecules and positively charged inorganic ions by the grafted polyelectrolyte layer. Thus, such nanometer-scaled hydrophilic polymers or polyelectrolyte layers on the CLPE surface of acetabular cup bearings could confer high durability to THA prosthetics.
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Affiliation(s)
- Masayuki Kyomoto
- 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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72
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Wan PJ, Tan DS, Li ZS, Zhang XQ, Li JH, Tan H. Biomimetic surface preparation of inert polymer films via grafting long monoalkyl chain phosphatidylcholine. CHINESE JOURNAL OF POLYMER SCIENCE 2011. [DOI: 10.1007/s10118-012-1111-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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73
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Devillers S, Barthélémy B, Delhalle J, Mekhalif Z. Induction heating vs conventional heating for the hydrothermal treatment of nitinol and its subsequent 2-(methacryloyloxy)ethyl 2-(trimethylammonio)ethyl phosphate coating by surface-initiated atom transfer radical polymerization. ACS APPLIED MATERIALS & INTERFACES 2011; 3:4059-4066. [PMID: 21910418 DOI: 10.1021/am200912k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nitinol is an alloy of great interest in general and especially in the biomedical field where many researches are aimed to improve both its corrosion resistance and its biocompatibility. In this work, we report on the advantage of an induction heating treatment in pure water compared to a conventional hydrothermal procedure. Both treatments lead to a hydroxylation of the surface, a decrease of the nickel amount in the outer part of the oxide layer, and a drastically decreased corrosion current density. However, the amount of surface hydroxyl groups is higher in the case of the induction heating treatment, which in turn leads to a denser grafting of atom transfer radical polymerization initiators and ultimately to a thicker 2-(methacryloyloxy)ethyl 2-(trimethylammonio)ethyl phosphate (MPC) polymer layer than in the case of conventional heating treatments. X-ray photoelectron spectroscopy (XPS), static contact angle, and polarization curves measurements as well as scanning electron microscopy (SEM) have been used to characterize the obtained modified surfaces.
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Affiliation(s)
- S Devillers
- Laboratory of Chemistry and Electrochemistry of Surfaces (CES), University of Namur (FUNDP), rue de Bruxelles, 61, B-5000 Namur, Belgium
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74
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Ma Y, Liu L, Yang W. Photo-induced living/controlled surface radical grafting polymerization and its application in fabricating 3-D micro-architectures on the surface of flat/particulate organic substrates. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.07.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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75
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Song A, Zhao D, Rong R, Zhang L, Wang H. Photografting of methacrylic acid onto HDPE initiated by acetaldehyde in aqueous solutions. J Appl Polym Sci 2010. [DOI: 10.1002/app.32683] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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76
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Kyomoto M, Moro T, Takatori Y, Kawaguchi H, Nakamura K, Ishihara K. Self-initiated surface grafting with poly(2-methacryloyloxyethyl phosphorylcholine) on poly(ether-ether-ketone). Biomaterials 2010; 31:1017-24. [DOI: 10.1016/j.biomaterials.2009.10.055] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Accepted: 10/25/2009] [Indexed: 10/20/2022]
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77
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78
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Lubricity and stability of poly(2-methacryloyloxyethyl phosphorylcholine) polymer layer on Co-Cr-Mo surface for hemi-arthroplasty to prevent degeneration of articular cartilage. Biomaterials 2009; 31:658-68. [PMID: 19819011 DOI: 10.1016/j.biomaterials.2009.09.083] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Accepted: 09/22/2009] [Indexed: 11/21/2022]
Abstract
Migration of the artificial femoral head to the inside of the pelvis due to the degeneration of acetabular cartilage has emerged as a serious issue in resurfacing or bipolar hemi-arthroplasty. Surface modification of cobalt-chromium-molybdenum alloy (Co-Cr-Mo) is one of the promising means of improving lubrication for preventing the migration of the artificial femoral head. In this study, we systematically investigated the surface properties, such as lubricity, biocompatibility, and stability of the various modification layers formed on the Co-Cr-Mo with the biocompatible 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer by dip coating or grafting. The cartilage/poly(MPC) (PMPC)-grafted Co-Cr-Mo interface, which mimicked a natural joint, showed an extremely low friction coefficient of <0.01, as low as that of a natural cartilage interface. Moreover, the long-term stability in water was confirmed for the PMPC-grafted layer; no hydrolysis of the siloxane bond was observed throughout soaking in phosphate-buffered saline for 12 weeks. The PMPC-grafted Co-Cr-Mo femoral head for hemi-arthroplasty is a promising option for preserving acetabular cartilage and extending the duration before total hip arthroplasty.
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