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Uchida K, Masuda T, Hara S, Matsuo Y, Liu Y, Aoki H, Asano Y, Miyata K, Fukuma T, Ono T, Isoyama T, Takai M. Stability Enhancement by Hydrophobic Anchoring and a Cross-Linked Structure of a Phospholipid Copolymer Film for Medical Devices. ACS APPLIED MATERIALS & INTERFACES 2024; 16:39104-39116. [PMID: 39036941 DOI: 10.1021/acsami.4c07752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
Surface modification using zwitterionic 2-methacryloyloxyethylphosphorylcholine (MPC) polymers is one of the most reasonable ways to prepare medical devices that can suppress undesired biological reactions such as blood coagulation. Usable MPC polymers are hydrophilic and water soluble, and their surface modification strategy involves exploiting the copolymer structures by adding physical or chemical bonding moieties. In this study, we developed copolymers composed of MPC, hydrophobic anchoring moiety, and chemical cross-linking unit to clarify the role of hydrophobic interactions in achieving biocompatible and long-term stable coatings. The four kinds of MPC copolymers with cross-linking units, such as 3-methacryloxypropyl trimethoxysilane (MPTMSi), and four different hydrophobic anchoring moieties, such as 3-(methacryloyloxy)propyltris(trimethylsiloxy)silane (MPTSSi) named as PMMMSi, n-butyl methacrylate (BMA) as PMBSi, 2-ethylhexyl methacrylate (EHMA) as PMESi, and lauryl methacrylate as PMLSi, were synthesized and coated on polydimethylsiloxane, polypropylene (PP), and polymethyl pentene. These copolymers were uniformly coated on the substrate materials PP and poly(methyl pentene) (PMP), to achieve hydrophilic and electrically neutral coatings. The results of the antibiofouling test showed that PMBSi repelled the adsorption of fluorescence-labeled bovine serum albumin the most, whereas PMLSi repelled it the least. Notably, all four copolymers suppressed platelet adhesion similarly. The variations in protein adsorption quantities among the four copolymer coatings were attributed to their distinct swelling behaviors in aqueous environments. Further investigations, including 3D scanning force microscopy and neutron reflectivity measurements, revealed that the PMLSi coating exhibited a higher water intake under aqueous conditions in comparison to the other coatings. Consequently, all copolymer coatings effectively prevented the invasion of platelets but the proteins penetrated the PMLSi network. Subsequently, the dynamic stability required to induce shear stress was evaluated using a circulation system. The results demonstrated that the PMMMSi and PMLSi coatings on PMP and PP exhibited exceptional platelet repellency and maintained high stability during circulation. This study highlights the potential of hydrophobic moieties to improve hemocompatibility and stability, offering potential applications in medical devices.
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Affiliation(s)
- Kazuto Uchida
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tsukuru Masuda
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shintaro Hara
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Clinical Engineering, Tokyo Women's Medical University, 8-1, Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
| | - Youichi Matsuo
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yuwei Liu
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 203-1, Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - Hiroyuki Aoki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, 203-1, Shirakata, Tokai, Ibaraki 319-1106, Japan
- Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai, Ibaraki 319-1195, Japan
| | - Yoshihiko Asano
- Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Kazuki Miyata
- Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
- WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Takeshi Fukuma
- Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
- WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Toshiya Ono
- Department of Biomedical Engineering, School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takashi Isoyama
- Department of Biomedical Engineering, School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Clinical Engineering, Kyorin University, 5-4-1 Shimorenjuku, Mitaka-shi, Tokyo 181-8612, Japan
| | - Madoka Takai
- Department of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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Gokaltun AA, Mazzaferro L, Yarmush ML, Usta OB, Asatekin A. Surface-segregating zwitterionic copolymers to control poly(dimethylsiloxane) surface chemistry. J Mater Chem B 2023; 12:145-157. [PMID: 38051000 PMCID: PMC10777474 DOI: 10.1039/d3tb02164e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
The use of microfluidic devices in biomedicine is growing rapidly in applications such as organs-on-chip and separations. Polydimethylsiloxane (PDMS) is the most popular material for microfluidics due to its ability to replicate features down to the nanoscale, flexibility, gas permeability, and low cost. However, the inherent hydrophobicity of PDMS leads to the adsorption of macromolecules and small molecules on device surfaces. This curtails its use in "organs-on-chip" and other applications. Current technologies to improve PDMS surface hydrophilicity and fouling resistance involve added processing steps or do not create surfaces that remain hydrophilic for long periods. This work describes a novel, simple, fast, and scalable method for improving surface hydrophilicity and preventing the nonspecific adsorption of proteins and small molecules on PDMS through the use of a surface-segregating zwitterionic copolymer as an additive that is blended in during manufacture. These highly branched copolymers spontaneously segregate to surfaces and rearrange in contact with aqueous solutions to resist nonspecific adsorption. We report that mixing a minute amount (0.025 wt%) of the zwitterionic copolymer in PDMS considerably reduces hydrophobicity and nonspecific adsorption of proteins (albumin and lysozyme) and small molecules (vitamin B12 and reactive red). PDMS blended with these zwitterionic copolymers retains its mechanical and physical properties for at least six months. Moreover, this approach is fully compatible with existing PDMS device manufacture protocols without additional processing steps and thus provides a low-cost and user-friendly approach to fabricating reliable biomicrofluidics.
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Affiliation(s)
- A Aslihan Gokaltun
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.
- Shriners Hospitals for Children, 51 Blossom St., Boston, MA, 02114, USA
- Department of Chemical and Biological Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA.
- Department of Chemical Engineering, Hacettepe University, 06532, Beytepe, Ankara, Turkey
| | - Luca Mazzaferro
- Department of Chemical and Biological Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA.
| | - Martin L Yarmush
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.
- Shriners Hospitals for Children, 51 Blossom St., Boston, MA, 02114, USA
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Rd., Piscataway, NJ 08854, USA
| | - O Berk Usta
- Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., Boston, MA, 02114, USA.
- Shriners Hospitals for Children, 51 Blossom St., Boston, MA, 02114, USA
| | - Ayse Asatekin
- Department of Chemical and Biological Engineering, Tufts University, 4 Colby St., Medford, MA, 02155, USA.
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Feliciano A, Soares E, Bosman AW, van Blitterswijk C, Moroni L, LaPointe VLS, Baker MB. Complementary Supramolecular Functionalization Enhances Antifouling Surfaces: A Ureidopyrimidinone-Functionalized Phosphorylcholine Polymer. ACS Biomater Sci Eng 2023; 9:4619-4631. [PMID: 37413691 PMCID: PMC10428092 DOI: 10.1021/acsbiomaterials.3c00425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/15/2023] [Indexed: 07/08/2023]
Abstract
Fibrosis of implants remains a significant challenge in the use of biomedical devices and tissue engineering materials. Antifouling coatings, including synthetic zwitterionic coatings, have been developed to prevent fouling and cell adhesion to several implantable biomaterials. While many of these coatings need covalent attachment, a conceptually simpler approach is to use a spontaneous self-assembly event to anchor the coating to a surface. This could simplify material processing through highly specific molecular recognition. Herein, we investigate the ability to utilize directional supramolecular interactions to anchor an antifouling coating to a polymer surface containing a complementary supramolecular unit. A library of controlled copolymerization of ureidopyrimidinone methacrylate (UPyMA) and 2-methacryloyloxyethyl phosphorylcholine (MPC) was prepared and their UPy composition was assessed. The MPC-UPy copolymers were characterized by 1H NMR, Fourier transform infrared (FTIR), and gel permeation chromatography (GPC) and found to exhibit similar mol % of UPy as compared to feed ratios and low dispersities. The copolymers were then coated on an UPy elastomer and the surfaces were assessed for hydrophilicity, protein absorption, and cell adhesion. By challenging the coatings, we found that the antifouling properties of the MPC-UPy copolymers with more UPy mol % lasted longer than the MPC homopolymer or low UPy mol % copolymers. As a result, the bioantifouling nature could be tuned to exhibit spatio-temporal control, namely, the longevity of a coating increased with UPy composition. In addition, these coatings showed nontoxicity and biocompatibility, indicating their potential use in biomaterials as antifouling coatings. Surface modification employing supramolecular interactions provided an approach that merges the simplicity and scalability of nonspecific coating methodology with the specific anchoring capacity found when using conventional covalent grafting with longevity that could be engineered by the supramolecular composition itself.
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Affiliation(s)
- Antonio
J. Feliciano
- Maastricht
University, MERLN, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands
| | - Eduardo Soares
- Maastricht
University, MERLN, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands
| | - Anton W. Bosman
- SupraPolix
B.V., Horsten 1, 5612 AX Eindhoven, The Netherlands
| | | | - Lorenzo Moroni
- Maastricht
University, MERLN, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands
| | - Vanessa L. S. LaPointe
- Maastricht
University, MERLN, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands
| | - Matthew B. Baker
- Maastricht
University, MERLN, Universiteitssingel 40, 6229 ER Maastricht, The Netherlands
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Ye F, Chen Z, Li C, Chen J, Yi G. A Study of the Phosphorylcholine Polymer Coating of a Polymethylpentene Hollow Fiber Membrane. Polymers (Basel) 2023; 15:2881. [PMID: 37447527 DOI: 10.3390/polym15132881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/20/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
A phosphorylcholine polymer (poly(MPC-co-BMA-co-TSMA), PMBT) was prepared by free radical polymerization and coated on the surface of the polymethylpentene hollow fiber membrane (PMP-HFM). ATR-FTIR and SEM analyses showed that the PMBT polymer containing phosphorylcholine groups was uniformly coated on the surface of the PMP-HFM. Thermogravimetric analysis showed that the PMBT had the best stability when the molar percentage of MPC monomer in the polymer was 35%. The swelling test and static contact angle test indicated that the coating had excellent hydrophilic properties. The fluorescence test results showed that the coating could resist dissolution with 90% (v/v%) ethanol solution and 1% (w/v%) SDS solution. The PMBT coating was shown to be able to decrease platelet adherence to the surface of the hollow fiber membrane, and lower the risk of blood clotting; it had good blood compatibility in tests of whole blood contact and platelet adhesion. These results show that the PMBT polymer may be coated on the surface of the PMP-HFM, and is helpful for improving the blood compatibility of membrane oxygenation.
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Affiliation(s)
- Feihua Ye
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Zhaoqing University, Zhaoqing 526061, China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhisheng Chen
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Chunsheng Li
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Zhaoqing University, Zhaoqing 526061, China
| | - Junhua Chen
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, Zhaoqing University, Zhaoqing 526061, China
| | - Guobin Yi
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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5
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Ishihara K. Biomimetic materials based on zwitterionic polymers toward human-friendly medical devices. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2022; 23:498-524. [PMID: 36117516 PMCID: PMC9481090 DOI: 10.1080/14686996.2022.2119883] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/26/2022] [Accepted: 08/28/2022] [Indexed: 06/01/2023]
Abstract
This review summarizes recent research on the design of polymer material systems based on biomimetic concepts and reports on the medical devices that implement these systems. Biomolecules such as proteins, nucleic acids, and phospholipids, present in living organisms, play important roles in biological activities. These molecules are characterized by heterogenic nature with hydrophilicity and hydrophobicity, and a balance of positive and negative charges, which provide unique reaction fields, interfaces, and functionality. Incorporating these molecules into artificial systems is expected to advance material science considerably. This approach to material design is exceptionally practical for medical devices that are in contact with living organisms. Here, it is focused on zwitterionic polymers with intramolecularly balanced charges and introduce examples of their applications in medical devices. Their unique properties make these polymers potential surface modification materials to enhance the performance and safety of conventional medical devices. This review discusses these devices; moreover, new surface technologies have been summarized for developing human-friendly medical devices using zwitterionic polymers in the cardiovascular, cerebrovascular, orthopedic, and ophthalmology fields.
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Affiliation(s)
- Kazuhiko Ishihara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
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Ishihara K, Suzuki K, Inoue Y, Fukazawa K. Effects of molecular architecture of photoreactive phospholipid polymer on adsorption and reaction on substrate surface under aqueous condition. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 32:419-437. [PMID: 33075239 DOI: 10.1080/09205063.2020.1839340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Water-soluble photoreactive polymers with both phosphorylcholine and benzophenone groups were synthesized for the reaction between the polymers and the substrate in aqueous medium. To control the polymer architecture, the living radical polymerization method was applied to the copolymerization of 2-methacryloyloxyethyl phosphorylcholine and benzophenone methacrylates. These polymers possess various architectures, such as linear polymers, polymers with hydrophobic terminals, and 4-armed star-like polymers, that could promote their adsorption on the substrate surfaces. Additionally, two types of benzophenone groups were examined. Due to the bulky phosphorylcholine group, tetra(ethylene oxide) group as a spacer between polymer main chain and benzophenone group was considered. These polymers could adsorb on the surface in an aqueous medium, followed by reaction on the surface via photoirradiation depending on the chemical structure of the benzophenone group. The thickness of the polymer layer depended on the polymer architecture, i.e. a polymer with a hydrophobic terminal could form a thick layer. After modification, the contact angle by air in the aqueous medium decreased, compared to that on the base substrate. This was due to the hydrophilic nature based on the phosphorylcholine groups at the surface. The amount of proteins adsorbed on the surface also decreased because of the surface modification. These findings indicated that these water-soluble photoreactive polymers could be applied for the safer and effective surface modification of substrates via conventional photoirradiation without using an organic solvent.
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Affiliation(s)
- Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan.,Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Kohei Suzuki
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Yuuki Inoue
- Department of Materials Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Kyoko Fukazawa
- Department of Materials Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan
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2-Methacryloyloxyethyl Phosphorylcholine Polymer Coating Inhibits Bacterial Adhesion and Biofilm Formation on a Suture: An In Vitro and In Vivo Study. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5639651. [PMID: 33062684 PMCID: PMC7547360 DOI: 10.1155/2020/5639651] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/24/2020] [Indexed: 12/17/2022]
Abstract
Initial bacterial adhesion to medical devices and subsequent biofilm formation are known as the leading causes of surgical site infection (SSI). Therefore, inhibition of bacterial adhesion and biofilm formation on the surface of medical devices can reduce the risk of SSIs. In this study, a highly hydrophilic, antibiofouling surface was prepared by coating the bioabsorbable suture surface with poly(2-methacryloyloxyethyl phosphorylcholine (MPC)-co-n-butyl methacrylate) (PMB). The PMB-coated and noncoated sutures exhibited similar mechanical strength and surface morphology. The effectiveness of the PMB coating on the suture to suppress adhesion and biofilm formation of methicillin-resistant Staphylococcus aureus and methicillin-susceptible Staphylococcus aureus was investigated both in vitro and in vivo. The bacterial adhesion test revealed that PMB coating significantly reduced the number of adherent bacteria, with no difference in the number of planktonic bacteria. Moreover, fluorescence microscopy and scanning electron microscopy observations of adherent bacteria on the suture surface after contact with bacterial suspension confirmed PMB coating-mediated inhibition of biofilm formation. Additionally, we found that the PMB-coated sutures exhibited significant antibiofouling effects in vivo. In conclusion, PMB-coated sutures demonstrated bacteriostatic effects associated with a highly hydrophilic, antibiofouling surface and inhibited bacterial adhesion and biofilm formation. Therefore, PMB-coated sutures could be a new alternative to reduce the risk of SSIs.
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Katayama R, Ikeda M, Shiraishi K, Matsumoto A, Kojima C. Formation of Hydrophobic Domains on the poly(MPC- co-Dodecyl Methacrylate)-Coated Surface Recognized by Macrophage-like Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12229-12235. [PMID: 30813727 DOI: 10.1021/acs.langmuir.9b00178] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Copolymers comprising 2-methacryloyloxyethyl phosphorylcholine (MPC) and hydrophobic methacrylic esters were used as biomembrane-mimetic polymers to provide blood compatibility. In the present study, we compared the surfaces coated with two MPC polymers with different alkyl groups, namely, poly(MPC-co-butyl methacrylate) (PMB) and poly(MPC-co-dodecyl methacrylate) (PMD), to clarify the effect of their hydrophobic units. Various substrates, such as poly(ethylene terephthalate), polycarbonate, polypropylene, acrylonitrile-butadiene-styrene copolymer, and stainless steel, were coated with ethanol solutions containing various concentrations of PMD or PMB. The solubility of PMD in ethanol changed depending on the water content. Scanning probe microscopy and rhodamine 6G staining revealed heterogeneous microstructures on the PMD-coated surface but not on the PMB-coated surface. Adhesion of various cells was efficiently suppressed by the PMD coating at lower concentration than the PMB coating, except regarding the adhesion of macrophage-like RAW264.7 cells. Our results suggest that the dodecyl groups in PMD increased its affinity for the substrates and simultaneously induced the formation of hydrophobic domains recognized by RAW264.7 cells.
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Affiliation(s)
- Risa Katayama
- Department of Applied Chemistry, Graduate School of Engineering , Osaka Prefecture University , 1-1, Gakuen-cho, Naka-ku , Sakai , Osaka 599-8531 , Japan
| | - Musashi Ikeda
- Department of Applied Chemistry, Graduate School of Engineering , Osaka Prefecture University , 1-1, Gakuen-cho, Naka-ku , Sakai , Osaka 599-8531 , Japan
| | - Kohei Shiraishi
- Graduate School of Systems Engineering , Kindai University , 1 Takaya-umenobe, Higashi-hiroshima , Hiroshima 739-2116 , Japan
| | - Akikazu Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering , Osaka Prefecture University , 1-1, Gakuen-cho, Naka-ku , Sakai , Osaka 599-8531 , Japan
| | - Chie Kojima
- Department of Applied Chemistry, Graduate School of Engineering , Osaka Prefecture University , 1-1, Gakuen-cho, Naka-ku , Sakai , Osaka 599-8531 , Japan
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Talib AJ, Fisher A, Voronine DV, Sinyukov AM, Bustamante Lopez SC, Ambardar S, Meissner KE, Scully MO, Sokolov AV. Fluorescence imaging of stained red blood cells with simultaneous resonance Raman photostability analysis. Analyst 2019; 144:4362-4370. [DOI: 10.1039/c9an00757a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Simultaneous fluorescence and resonance Raman imaging of R6G-stained red blood cells with optimal laser power.
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Affiliation(s)
- Ansam J. Talib
- Institute for Quantum Science and Engineering
- Texas A&M University
- College Station
- USA
- Department of Physics
| | - Andrew Fisher
- Department of Physics
- Centre for Nanohealth
- Swansea University
- Wales
- UK
| | - Dmitri V. Voronine
- Department of Physics
- University of South Florida
- Tampa
- USA
- Department of Medical Engineering
| | | | - Sandra C. Bustamante Lopez
- Institute for Quantum Science and Engineering
- Texas A&M University
- College Station
- USA
- Department of Physics
| | - Sharad Ambardar
- Department of Physics
- University of South Florida
- Tampa
- USA
- Department of Medical Engineering
| | | | - Marlan O. Scully
- Institute for Quantum Science and Engineering
- Texas A&M University
- College Station
- USA
- Department of Physics
| | - Alexei V. Sokolov
- Institute for Quantum Science and Engineering
- Texas A&M University
- College Station
- USA
- Department of Physics
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Plasmonic Nanoparticles Driven Enhanced Light Amplification in a Local 2D and 3D Self-Assembly. NANOMATERIALS 2018; 8:nano8121051. [PMID: 30558207 PMCID: PMC6315343 DOI: 10.3390/nano8121051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/10/2018] [Accepted: 12/11/2018] [Indexed: 12/12/2022]
Abstract
We present fluorescence and a random lasing enhancement effect due to the interaction between gold nanoparticles (AuNPs) and Rhodamine 6G (Rh6G) dye. Non-covalently bounded dyes in the proximity of nanoparticles are studied in three systems of varying dimensionality: from (i) three-dimensional freely distributed suspensions, through (ii) quasi-two-dimensional multilamellar liposomes, to (iii) solid two-dimensional thin layers. Liposomes facilitate the formation of stable AuNPs/Rh6G composition showing enhanced fluorescence, while solid thin films exhibit plasmon-assisted random lasing.
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11
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Ishihara K, Fukazawa K, Inoue Y, Koyama J, Mori Y, Kinoshita T, Hiranuma K, Yasuda N. Reliable surface modification of dental plastic substrates to reduce biofouling with a photoreactive phospholipid polymer. J Appl Polym Sci 2018. [DOI: 10.1002/app.46512] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kazuhiko Ishihara
- Department of Materials Engineering; University of Tokyo; 7-3-1 Hongo Bunkyo-Ku Tokyo 113-8656 Japan
| | - Kyoko Fukazawa
- Department of Materials Engineering; University of Tokyo; 7-3-1 Hongo Bunkyo-Ku Tokyo 113-8656 Japan
| | - Yuuki Inoue
- Department of Materials Engineering; University of Tokyo; 7-3-1 Hongo Bunkyo-Ku Tokyo 113-8656 Japan
| | - Jun Koyama
- Department of Dentistry and Oral and Maxillofacial Surgery; Jichi Medical University; 3311-1 Yakusiji, Simotsuke 329-0498 Japan
| | - Yoshiyuki Mori
- Department of Dentistry and Oral and Maxillofacial Surgery; Jichi Medical University; 3311-1 Yakusiji, Simotsuke 329-0498 Japan
| | - Toru Kinoshita
- Kinoshita Dental Clinic; 3-12-7 Nishiogi-Kita Suginami 167-0042 Tokyo Japan
| | - Katsumi Hiranuma
- Department of Dentistry and Oral and Maxillofacial Surgery; Jichi Medical University; 3311-1 Yakusiji, Simotsuke 329-0498 Japan
- Kinoshita Dental Clinic; 3-12-7 Nishiogi-Kita Suginami 167-0042 Tokyo Japan
| | - Noboru Yasuda
- Kinoshita Dental Clinic; 3-12-7 Nishiogi-Kita Suginami 167-0042 Tokyo Japan
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12
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13
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Monodisperse manganese oxide nanoparticles: Synthesis, characterization, and chemical reactivity. J Colloid Interface Sci 2017; 510:272-279. [PMID: 28957743 DOI: 10.1016/j.jcis.2017.09.082] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/25/2017] [Accepted: 09/21/2017] [Indexed: 11/23/2022]
Abstract
Highly monodisperse amorphous manganese oxide (MnOx) nanospheres with diameter of ca. 300nm have been obtained from ammonia aqueous solution of KMnO4 at room temperature. The amorphous MnOx nanospheres successfully converted to monodisperse K-OMS-2 (cryptomelane) and K-OMS-2/Mn2O3 nanoraspberries through calcination process at 600 and 800°C, respectively. Analyzing the structure of such amorphous MnOx has been a challenge because fewer reports are available to examine amorphous structure. Thus, shape, crystallinity, and structure of the amorphous and crystalline MnOx nanostructures were characterized in detail by X-ray diffraction (XRD), thermogravimetry/differential thermal analysis (TG/DTA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and energy dispersive spectroscopy (EDS). We discussed a plausible formation mechanism of amorphous MnOx nanospheres based on the investigations. The obtained MnOx nanostructures have been demonstrated to possess oxidative degradation ability of Rhodamine B (RhB) under acidic aqueous condition without any additives such as chemical oxidizing agents and UV and/or visible light irradiation. RhB degradation rate of amorphous MnOx nanospheres was about one hundred times faster than that of K-OMS-2 nanoraspberries.
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Sae-ung P, Kolewe KW, Bai Y, Rice EW, Schiffman JD, Emrick T, Hoven VP. Antifouling Stripes Prepared from Clickable Zwitterionic Copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7028-7035. [PMID: 28617603 PMCID: PMC5540164 DOI: 10.1021/acs.langmuir.7b01431] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, we have fabricated robust patterned surfaces that contain biocompatible and antifouling stripes, which cause microorganisms to consolidate into bare silicon spaces. Copolymers of methacryloyloxyethyl phosphorylcholine (MPC) and a methacrylate-substituted dihydrolipoic acid (DHLA) were spin-coated onto silicon substrates. The MPC units contributed biocompatibility and antifouling properties, and the DHLA units enabled cross-linking and the formation of robust thin films. Photolithography enabled the formation of 200-μm-wide poly(MPC-DHLA) stripped patterns that were characterized using atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and rhodamine 6G staining. Regardless of the spacing between poly(MPC-DHLA) stripes (10, 50, or 100 μm), Escherichia coli rapidly adhered to the bare silicon gaps that lacked the copolymer, confirming the antifouling nature of MPC. Overall, this work provides a surface modification strategy for generating alternating biofouling and nonfouling surface structures that are potentially applicable for researchers studying cell biology, drug screening, and biosensor technology.
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Affiliation(s)
- Pornpen Sae-ung
- Program in Macromolecular Science, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Kristopher W. Kolewe
- Department of Chemical Engineering, University of Massachusetts, Amherst, MA 01003, USA
| | - Ying Bai
- Department of Polymer Science and Engineering, Conte Center for Polymer Research, University of Massachusetts, Amherst, MA 01003, USA
| | - Eric W. Rice
- Department of Chemical Engineering, University of Massachusetts, Amherst, MA 01003, USA
| | - Jessica D. Schiffman
- Department of Chemical Engineering, University of Massachusetts, Amherst, MA 01003, USA
| | - Todd Emrick
- Department of Polymer Science and Engineering, Conte Center for Polymer Research, University of Massachusetts, Amherst, MA 01003, USA
| | - Voravee P. Hoven
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
- Center of Excellence in Materials and Bio-interfaces, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
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15
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Nakai K, Ishihara K, Yusa SI. Preparation of Giant Polyion Complex Vesicles (G-PICsomes) with Polyphosphobetaine Shells Composed of Oppositely Charged Diblock Copolymers. CHEM LETT 2017. [DOI: 10.1246/cl.170168] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Keita Nakai
- Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280
| | - Kazuhiko Ishihara
- Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Shin-ichi Yusa
- Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280
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Kaur A, Jyoti K, Rai S, Sidhu R, Pandey RS, Jain UK, Katyal A, Madan J. Tetanus toxoid-loaded cationic non-aggregated nanostructured lipid particles triggered strong humoral and cellular immune responses. J Microencapsul 2016; 33:263-73. [DOI: 10.3109/02652048.2016.1169324] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Amandeep Kaur
- Department of Pharmaceutics, Chandigarh College of Pharmacy, Mohali, Punjab, India
| | - Kiran Jyoti
- Department of Pharmaceutics, Chandigarh College of Pharmacy, Mohali, Punjab, India
| | - Shweta Rai
- Dr. B.R Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Rupinder Sidhu
- Department of Pharmaceutics, Chandigarh College of Pharmacy, Mohali, Punjab, India
| | - Ravi Shankar Pandey
- SLT Institute of Pharmaceutical Sciences, Guru Ghasidas University, Bilaspur, Chhattisgarh, India
| | - Upendra Kumar Jain
- Department of Pharmaceutics, Chandigarh College of Pharmacy, Mohali, Punjab, India
| | - Anju Katyal
- Dr. B.R Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Jitender Madan
- Department of Pharmaceutics, Chandigarh College of Pharmacy, Mohali, Punjab, India
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17
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Narrow Bandwidth Top-Emitting OLEDs Designed for Rhodamine 6G Excitation in Biological Sensing Applications. ELECTRONICS 2015. [DOI: 10.3390/electronics4040982] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Nagahashi K, Teramura Y, Takai M. Stable surface coating of silicone elastomer with phosphorylcholine and organosilane copolymer with cross-linking for repelling proteins. Colloids Surf B Biointerfaces 2015. [DOI: 10.1016/j.colsurfb.2015.07.040] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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19
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Kuroda K, Miyoshi H, Fujii S, Hirai T, Takahara A, Nakao A, Iwasaki Y, Morigaki K, Ishihara K, Yusa SI. Poly(dimethylsiloxane) (PDMS) surface patterning by biocompatible photo-crosslinking block copolymers. RSC Adv 2015. [DOI: 10.1039/c5ra08843g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Poly(dimethylsiloxane) (PDMS) surface was patterned by poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC)-containing photo-crosslinking diblock copolymers upon photo-irradiation.
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Affiliation(s)
- Keita Kuroda
- Department of Materials Science and Chemistry
- University of Hyogo
- Himeji
- Japan
| | | | - Shota Fujii
- Graduate School of Engineering
- Kyushu University
- Nishi-ku
- Japan
| | - Tomoyasu Hirai
- Graduate School of Engineering
- Kyushu University
- Nishi-ku
- Japan
| | - Atsushi Takahara
- Graduate School of Engineering
- Kyushu University
- Nishi-ku
- Japan
- Institute for Materials Chemistry and Engineering
| | - Aiko Nakao
- Nishina Center for Accelerator-Based Science, Nuclear Spectroscopy Laboratory
- RIKEN
- Wako
- Japan
| | - Yasuhiko Iwasaki
- Faculty of Chemistry, Materials and Bioengineering
- Kansai University
- Suita
- Japan
| | - Kenichi Morigaki
- Research Center for Environmental Genomics
- Kobe University
- Nada
- Japan
| | - Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Shin-ichi Yusa
- Department of Materials Science and Chemistry
- University of Hyogo
- Himeji
- Japan
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20
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Butruk-Raszeja B, Trzaskowski M, Ciach T. Cell membrane-mimicking coating for blood-contacting polyurethanes. J Biomater Appl 2014; 29:801-12. [DOI: 10.1177/0885328214549611] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of the present work was to develop simple modification technique for polyurethanes (PUs) intended for use in blood-contacting implants (vascular grafts, heart prosthesis, ventricular assist devices). PU surface was modified with soybean-derived phosphatidylcholine (PC) via one-step dip coating technique. In order to evaluate blood compatibility of the obtained materials, samples were contacted with human blood under static and arterial flow-simulated conditions. The PC-modified surfaces were thoroughly characterized and tested for fibrinogen resistance, the ability to resist platelet adhesion and activation, hemolysis percentage and plasma recalcification time. Results demonstrated significant, more than three-fold reduction in the amount of fibrinogen adsorbed to PC-modified materials as compared to non-modified PU. Analysis of the samples’ surface after incubation with blood showed high reduction in platelet adhesion. The results were confirmed by analysis of blood samples collected after shear-stress tests – the percentage of free (non-aggregated) platelets remaining in blood samples contacted with PC-coated materials exceeded 70%. The same parameter measured for non-modified PU was significantly lower and equaled 28%.
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Affiliation(s)
- Beata Butruk-Raszeja
- Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Maciej Trzaskowski
- Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Tomasz Ciach
- Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warsaw, Poland
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Araya-Hermosilla E, Muñoz D, Orellana S, Yáñez A, Olea AF, Oyarzun-Ampuero F, Moreno-Villoslada I. Immobilization of rhodamine 6G in calcium alginate microcapsules based on aromatic–aromatic interactions with poly(sodium 4-styrenesulfonate). REACT FUNCT POLYM 2014. [DOI: 10.1016/j.reactfunctpolym.2014.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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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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Ryan Stanfield J, Bamberg S. Durability evaluation of biopolymer coating on titanium alloy substrate. J Mech Behav Biomed Mater 2014; 35:9-17. [DOI: 10.1016/j.jmbbm.2014.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 03/11/2014] [Accepted: 03/13/2014] [Indexed: 10/25/2022]
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24
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Dhami NK, Pandey RS, Jain UK, Chandra R, Madan J. Non-aggregated protamine-coated poly(lactide-co-glycolide) nanoparticles of cisplatin crossed blood-brain barrier, enhanced drug delivery and improved therapeutic index in glioblastoma cells: in vitro studies. J Microencapsul 2014; 31:685-93. [PMID: 24963955 DOI: 10.3109/02652048.2014.913725] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND OBJECTIVES Non-aggregated protamine impregnated poly(lactide-co-glycolide) nanoparticles of cisplatin (Pt-PLGA NPs) were synthesized to augment brain delivery. METHODS AND RESULTS The mean particle size of Pt-PLGA NPs and PLGA NPs were observed to be 173.2 ± 7.9 nm and 140 ± 10.2 nm, respectively. The Pt-PLGA NPs significantly (p < 0.05, one-way analysis of variance; ANOVA) delivered higher amount (172.41 ± 15.04 μg) of cisplatin in comparison to 110.48 ± 4.71 μg by PLGA NPs and 20.83 ± 1.65 μg by cisplatin solution across in vitro bovine brain microvessel endothelial cells. Cisplatin bearing Pt-PLGA NPs was found to be highly cytotoxic to U87 glioblastoma cells with an IC50 of 2.1 μM as compared (one-way ANOVA, p < 0.05) to PLGA NPs (3.9 μM) and cisplatin alone (13.33 μM). Impregnation with Pt enhanced the uptake of PLGA NPs in U87 glioblastoma cells as compared to PLGA NPs by following endocytosis mechanism. CONCLUSION Cisplatin-loaded Pt-PLGA NPs compel preclinical tumour regression study to further improve its utility against glioblastoma.
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Affiliation(s)
- Neel Kamal Dhami
- Department of Pharmaceutics, Chandigarh College of Pharmacy , Mohali, Punjab , India
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25
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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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Skorb EV, Baidukova O, Goyal A, Brotchie A, Andreeva DV, Möhwald H. Sononanoengineered magnesium–polypyrrole hybrid capsules with synergetic trigger release. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30768e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Ye SH, Johnson CA, Woolley JR, Murata H, Gamble LJ, Ishihara K, Wagner WR. Simple surface modification of a titanium alloy with silanated zwitterionic phosphorylcholine or sulfobetaine modifiers to reduce thrombogenicity. Colloids Surf B Biointerfaces 2010; 79:357-64. [PMID: 20547042 PMCID: PMC3178391 DOI: 10.1016/j.colsurfb.2010.04.018] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 04/16/2010] [Accepted: 04/19/2010] [Indexed: 10/19/2022]
Abstract
Thrombosis and thromboembolism remain problematic for a large number of blood contacting medical devices and limit broader application of some technologies due to this surface bioincompatibility. In this study we focused on the covalent attachment of zwitterionic phosphorylcholine (PC) or sulfobetaine (SB) moieties onto a TiAl(6)V(4) surface with a single step modification method to obtain a stable blood compatible interface. Silanated PC or SB modifiers (PCSi or SBSi) which contain an alkoxy silane group and either PC or SB groups were prepared respectively from trimethoxysilane and 2-methacryloyloxyethyl phosphorylcholine (MPC) or N-(3-sulfopropyl)-N-(methacryloxyethyl)-N,N-dimethylammonium betaine (SMDAB) monomers by a hydrosilylation reaction. A cleaned and oxidized TiAl(6)V(4) surface was then modified with the PCSi or SBSi modifiers by a simple surface silanization reaction. The surface was assessed with X-ray photoelectron spectroscopy (XPS), attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and contact angle goniometry. Platelet deposition and bulk phase activation were evaluated following contact with anticoagulated ovine blood. XPS results verified successful modification of the PCSi or SBSi modifiers onto TiAl(6)V(4) based on increases in surface phosphorous or sulfur respectively. Surface contact angles in water decreased with the addition of hydrophilic PC or SB moieties. Both the PCSi and SBSi modified TiAl(6)V(4) surfaces showed decreased platelet deposition and bulk phase platelet activation compared to unmodified TiAl(6)V(4) and control surfaces. This single step modification with PCSi or SBSi modifiers offers promise for improving the surface hemocompatibility of TiAl(6)V(4) and is attractive for its ease of application to geometrically complex metallic blood contacting devices.
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Affiliation(s)
- Sang-Ho Ye
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Carl A. Johnson
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Joshua R. Woolley
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Hironobu Murata
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Lara J. Gamble
- Department of Bioengineering and NESAC/BIO, University of Washington, Seattle, WA 98195, USA
| | - Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - William R. Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
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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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Kessler V, Seisenbaeva G, Unell M, Håkansson S. Chemically Triggered Biodelivery Using Metal-Organic Sol-Gel Synthesis. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803307] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Kessler V, Seisenbaeva G, Unell M, Håkansson S. Chemically Triggered Biodelivery Using Metal-Organic Sol-Gel Synthesis. Angew Chem Int Ed Engl 2008; 47:8506-9. [DOI: 10.1002/anie.200803307] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Kyomoto M, Moro T, Miyaji F, Hashimoto M, Kawaguchi H, Takatori Y, Nakamura K, Ishihara K. Effect of 2‐methacryloyloxyethyl phosphorylcholine concentration on photo‐induced graft polymerization of polyethylene in reducing the wear of orthopaedic bearing surface. J Biomed Mater Res A 2008; 86:439-47. [DOI: 10.1002/jbm.a.31511] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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32
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Steves JM, Tan LT, Gardella JA, Hard R, Hicks WL, Cartwright AN, Koc B, Bright FV. Guest aggregation within poly(L-lactic acid)/pluronic P104 thin films. APPLIED SPECTROSCOPY 2008; 62:290-294. [PMID: 18339236 DOI: 10.1366/000370208783759605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Rhodamine 6G (R6G) doped thin films composed of poly(L-lactic acid) (PLLA) and Pluronic P104 were spin cast onto glass microscope slides and characterized by ultraviolet-visible, steady-state, and time-resolved fluorescence spectroscopy. The results show that R6G aggregation within the film increases as the R6G concentration and P104 loading increases. These results suggest an approach for studying drug distributions (monomers, aggregates) within biodegradable polymer formulations.
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Affiliation(s)
- Jordan M Steves
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA
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Affiliation(s)
- P.L. Gai
- Department of Chemistry and Department of Physics, The York–JEOL Nanocentre, University of York Heslington York YO10 5DD UK
- Central Research and Development Laboratories DuPont, Experimental Station Wilmington DE 19880-0356 USA
- University of Delaware Department of Materials Science and Engineering Newark DE 19716 USA
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