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Cai J, Shen F, Zhao J, Xiao X. Enzymatic biofuel cell: A potential power source for self-sustained smart textiles. iScience 2024; 27:108998. [PMID: 38333690 PMCID: PMC10850773 DOI: 10.1016/j.isci.2024.108998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024] Open
Abstract
Self-sustained smart textiles require a miniaturized and flexible power source, while the state-of-the-art lithium-ion battery cannot be seamlessly integrated into smart textiles. Enzymatic biofuel cells (EBFC), utilizing physiological glucose or lactate as fuels to convert chemical energy into electricity, are a potential alternative power source. In comparison to other proposed energy harvesters relying on solar and biomechanical energy, EBFCs feature several key properties, including continuous power generation, biocompatible interfaces without using toxic elements, simple configuration without extra packaging, and biodegradability. There is an urgent need to introduce EBFCs to the researchers working on smart textiles, who typically are not expert on bioelectrochemistry. This minireview first introduces the working principle of EBFC and then summarizes its recent progress on fibers, yarns, and textiles. It's expected that this review can help to bridge the knowledge gap and provide the community of smart textiles with information on both the strengths and limitations of EBFCs.
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Affiliation(s)
- Jingsheng Cai
- School of Materials Engineering, Changshu Institute of Technology, Changshu 215500, China
| | - Fei Shen
- Jiangsu Zoolnasm Technology CO., LTD, Suzhou 215000, China
| | - Jianqing Zhao
- Jiangsu Zoolnasm Technology CO., LTD, Suzhou 215000, China
| | - Xinxin Xiao
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg, Denmark
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2
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Simon L, Lapinte V, Morille M. Exploring the role of polymers to overcome ongoing challenges in the field of extracellular vesicles. J Extracell Vesicles 2023; 12:e12386. [PMID: 38050832 PMCID: PMC10696644 DOI: 10.1002/jev2.12386] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 12/07/2023] Open
Abstract
Extracellular vesicles (EVs) are naturally occurring nanoparticles released from all eucaryotic and procaryotic cells. While their role was formerly largely underestimated, EVs are now clearly established as key mediators of intercellular communication. Therefore, these vesicles constitute an attractive topic of study for both basic and applied research with great potential, for example, as a new class of biomarkers, as cell-free therapeutics or as drug delivery systems. However, the complexity and biological origin of EVs sometimes complicate their identification and therapeutic use. Thus, this rapidly expanding research field requires new methods and tools for the production, enrichment, detection, and therapeutic application of EVs. In this review, we have sought to explain how polymer materials actively contributed to overcome some of the limitations associated to EVs. Indeed, thanks to their infinite diversity of composition and properties, polymers can act through a variety of strategies and at different stages of EVs development. Overall, we would like to emphasize the importance of multidisciplinary research involving polymers to address persistent limitations in the field of EVs.
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Affiliation(s)
| | | | - Marie Morille
- ICGM, Univ Montpellier, CNRS, ENSCMMontpellierFrance
- Institut universitaire de France (IUF)ParisFrance
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3
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Zhao C, Pan B, Wang M, Si Y, Taha AY, Liu G, Pan T, Sun G. Improving the Sensitivity of Nanofibrous Membrane-Based ELISA for On-Site Antibiotics Detection. ACS Sens 2022; 7:1458-1466. [PMID: 35426310 DOI: 10.1021/acssensors.2c00208] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An ultrasensitive and portable colorimetric enzyme-linked immunosorbent assay (ELISA) sensor for antibiotics was fabricated by immobilizing antibodies inside the largely porous and highly hydrophilic nanofibrous membranes. Different from regular electrospun nanofibrous membranes where antibodies may frequently be blocked by the heterogeneous porous structure and sterically crowded loaded on the surface, the controlled microporous structure and increased hydrophilicity of nanofibrous membranes could improve the diffusion properties of antibodies, reduce the sterically crowding effect, and dramatically improve the sensitivity of the membrane-based ELISA. The limitation of detection (LOD) for chloramphenicol (CAP) reached 0.005 ng/mL, around 200 times lower than the conventional paper-based ELISA, making quantitative analysis and portable on-site detection achievable via the use of smartphones. The successful design and fabrication of the nanofibrous membrane-based ELISA with novel features overcome the structural drawbacks of regular electrospun nanofibrous membranes and provide new paths to develop highly sensitive on-site detection of hazardous chemical agents.
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Affiliation(s)
- Cunyi Zhao
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
| | - Bofeng Pan
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
| | - Minyuan Wang
- Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California 95616, United States
| | - Yang Si
- Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Ameer Y Taha
- Department of Food Science and Technology, University of California, Davis, California 95616, United States
| | - Gangyu Liu
- Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California 95616, United States
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Tingrui Pan
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Gang Sun
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
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4
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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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5
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Manivasagam V, Popat KC. In Vitro Investigation of Hemocompatibility of Hydrothermally Treated Titanium and Titanium Alloy Surfaces. ACS OMEGA 2020; 5:8108-8120. [PMID: 32309720 PMCID: PMC7161035 DOI: 10.1021/acsomega.0c00281] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 03/25/2020] [Indexed: 06/01/2023]
Abstract
For decades, titanium and its alloys have been established as a biocompatible material for cardiovascular medical devices such as heart valves, stents, vascular grafts, catheters, etc. However, thrombosis is one of the reasons for implant failure, where blood clot forms on the implant surface, thus obstructing the flow of the blood and that leads to some serious complications. Various surface modification techniques such as heparin modification, albumin coating, surface anodization, plasma etching, and hydrothermal treatments have been explored to improve the hemocompatibility of titanium-based materials. However, there are several limitations related to the robustness of the surfaces and long-term efficacy in vivo. In this study, titanium and its alloy Ti-6Al-4V were hydrothermally treated to form nanostructured surfaces with the aim to enhance their hemocompatibility. These modified surfaces were characterized for their wettability, surface morphology, surface chemistry, and crystallinity. The hemocompatibility of these surfaces was characterized by evaluating blood plasma protein adsorption, platelet adhesion and activation, platelet-leukocyte complex formation, and whole blood clotting. The results indicate lower fibrinogen adsorption, cell adhesion, platelet activation, and whole blood clotting on hydrothermally treated surfaces. Thus, these surfaces may be a promising approach to prevent thrombosis for several titanium blood-contacting medical devices.
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Affiliation(s)
- Vignesh
K. Manivasagam
- Department
of Mechanical Engineering, Colorado State
University, Fort Collins, Colorado 80523, United States
| | - Ketul C. Popat
- Department
of Mechanical Engineering, Colorado State
University, Fort Collins, Colorado 80523, United States
- School
of Biomedical Engineering, Colorado State
University, Fort Collins, Colorado 80523, United States
- School
of Advanced Materials Discovery, Colorado
State University, Fort Collins, Colorado 80523, United States
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6
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Zhang D, Chen Q, Zhang W, Liu H, Wan J, Qian Y, Li B, Tang S, Liu Y, Chen S, Liu R. Silk‐Inspired β‐Peptide Materials Resist Fouling and the Foreign‐Body Response. Angew Chem Int Ed Engl 2020; 59:9586-9593. [DOI: 10.1002/anie.202000416] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/10/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Donghui Zhang
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Qi Chen
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Wenjing Zhang
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Hengjiang Liu
- State Key Laboratory of Chemical EngineeringSchool of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Jianglin Wan
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Yuxin Qian
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Bing Li
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Songchao Tang
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Yu Liu
- State Key Laboratory of Chemical EngineeringSchool of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Shengfu Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of EducationCollege of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang 310027 China
| | - Runhui Liu
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
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7
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Zhang D, Chen Q, Zhang W, Liu H, Wan J, Qian Y, Li B, Tang S, Liu Y, Chen S, Liu R. Silk‐Inspired β‐Peptide Materials Resist Fouling and the Foreign‐Body Response. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000416] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Donghui Zhang
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Qi Chen
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Wenjing Zhang
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Hengjiang Liu
- State Key Laboratory of Chemical EngineeringSchool of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Jianglin Wan
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Yuxin Qian
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Bing Li
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Songchao Tang
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
| | - Yu Liu
- State Key Laboratory of Chemical EngineeringSchool of Chemical EngineeringEast China University of Science and Technology Shanghai 200237 China
| | - Shengfu Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of EducationCollege of Chemical and Biological EngineeringZhejiang University Hangzhou Zhejiang 310027 China
| | - Runhui Liu
- State Key Laboratory of Bioreactor EngineeringSchool of Materials Science and EngineeringEast China University of Science and Technology Shanghai 200237 China
- Key Laboratory for Ultrafine Materials of Ministry of EducationResearch Center for Biomedical Materials of Ministry of EducationEast China University of Science and Technology Shanghai 200237 China
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8
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Jafari M, Abolmaali SS, Najafi H, Tamaddon AM. Hyperbranched polyglycerol nanostructures for anti-biofouling, multifunctional drug delivery, bioimaging and theranostic applications. Int J Pharm 2020; 576:118959. [DOI: 10.1016/j.ijpharm.2019.118959] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 12/09/2019] [Accepted: 12/12/2019] [Indexed: 12/22/2022]
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9
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Tsai CW, Chiang IN, Wang JH, Young TH. Chitosan delaying human fibroblast senescence through downregulation of TGF-β signaling pathway. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1852-1863. [DOI: 10.1080/21691401.2017.1394873] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ching-Wen Tsai
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - I-Ni Chiang
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
- Department of Urology, National Taiwan University Hospital, Taipei, Taiwan
| | - Jyh-Horng Wang
- Department of Orthopedic Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - Tai-Horng Young
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
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10
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Zhang W, Li G, Lin Y, Wang L, Wu S. Preparation and characterization of protein-resistant hydrogels for soft contact lens applications via radical copolymerization involving a zwitterionic sulfobetaine comonomer. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:1935-1949. [DOI: 10.1080/09205063.2017.1363127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Wanlu Zhang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Guangji Li
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Yinlei Lin
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Liying Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Shuqing Wu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
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11
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Chien HW, Cheng PH, Chen SY, Yu J, Tsai WB. Low-fouling and functional poly(carboxybetaine) coating via a photo-crosslinking process. Biomater Sci 2017; 5:523-531. [DOI: 10.1039/c6bm00637j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Antifouling modification technology is developed for many biomedical applications such as blood-contact devices and biosensors.
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Affiliation(s)
- Hsiu-Wen Chien
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Po-Hsiu Cheng
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Shao-Yung Chen
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
| | - Wei-Bor Tsai
- Department of Chemical Engineering
- National Taiwan University
- Taipei 106
- Taiwan
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12
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Morar-Mitrica S, Puri M, Beumer Sassi A, Fuller J, Hu P, Crotts G, Nesta D. Development of a stable low-dose aglycosylated antibody formulation to minimize protein loss during intravenous administration. MAbs 2015; 7:792-803. [PMID: 26073995 PMCID: PMC4622870 DOI: 10.1080/19420862.2015.1046664] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/21/2015] [Accepted: 04/22/2015] [Indexed: 10/23/2022] Open
Abstract
The physical and chemical integrity of a biopharmaceutical must be maintained not only during long-term storage but also during administration. Specifically for the intravenous (i.v.) delivery of a protein drug, loss of stability can occur when the protein formulation is compounded with i.v. bag diluents, thus modifying the original composition of the drug product. Here we present the challenges associated with the delivery of a low-dose, highly potent monoclonal antibody (mAb) via the i.v. route. Through parallel in-use stability studies and conventional formulation development, a drug product was developed in which adsorptive losses and critical oxidative degradation pathways were effectively controlled. This development approach enabled the i.v. administration of clinical doses in the range of 0.1 to 0.5 mg total protein, while ensuring liquid drug product storage stability under refrigerated conditions.
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Key Words
- CD3, cluster of differentiation 3
- CMC, critical micelle concentration
- Cys, cysteine
- DSC, differential scanning calorimetry
- EDTA, edetate disodium
- Glut, glutathione
- HPLC, high performance liquid chromatography
- M, methionine residues
- MS, mass spectrometry
- MTG, monothioglycerol
- Met, methionine
- PES, polyethersulfone
- PO, polyolefin
- PS80, polysorbate 80
- PVC, polyvinylchloride
- SDS-PAGE, sodium dodecyl sulfate polyacrylamide gel electrophoresis
- administration
- adsorption
- antioxidant
- biopharmaceutical
- cIEF, capillary isoelectric focusing
- dilution
- i.v., intravenous
- infusion
- intravenous
- low concentration
- low dose
- mAb, monoclonal antibody
- monoclonal antibody
- oxidation
- stability
- surfactant
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Affiliation(s)
- Sorina Morar-Mitrica
- Biopharmaceutical Product Sciences; GlaxoSmithKline R&D; King of Prussia, PA, USA
| | - Manasi Puri
- Biopharmaceutical Product Sciences; GlaxoSmithKline R&D; King of Prussia, PA, USA
| | | | - Joshua Fuller
- Bioanalytical Sciences; GlaxoSmithKline R&D; King of Prussia, PA, USA
| | - Ping Hu
- Analytical Development; Janssen R&D, LLC; Malvern, PA, US
| | - George Crotts
- Biopharmaceutical Product Sciences; GlaxoSmithKline R&D; King of Prussia, PA, USA
| | - Douglas Nesta
- Biopharmaceutical Product Sciences; GlaxoSmithKline R&D; King of Prussia, PA, USA
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13
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Abstract
The recent research progress in biological and biomedical applications of hyperbranched polymers has been summarized in this review.
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Affiliation(s)
- Dali Wang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai
- P. R. China
| | - Tianyu Zhao
- Charles Institute of Dermatology
- School of Medicine and Medical Science
- University College Dublin
- Dublin 4
- Ireland
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai
- P. R. China
| | - Deyue Yan
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai
- P. R. China
| | - Wenxin Wang
- Charles Institute of Dermatology
- School of Medicine and Medical Science
- University College Dublin
- Dublin 4
- Ireland
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14
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Beckwith KM, Sikorski P. Patterned cell arrays and patterned co-cultures on polydopamine-modified poly(vinyl alcohol) hydrogels. Biofabrication 2013; 5:045009. [DOI: 10.1088/1758-5082/5/4/045009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Goda T, Miyahara Y. Interpretation of protein adsorption through its intrinsic electric charges: a comparative study using a field-effect transistor, surface plasmon resonance, and quartz crystal microbalance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14730-8. [PMID: 22992058 DOI: 10.1021/la302977s] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We describe the highly sensitive detection of the nonspecific adsorption of proteins onto a 1-undecanethiol self-assembled monolayer (SAM)-formed gold electrode by parallel analysis using field effect transistor (FET), surface plasmon resonance (SPR), and quartz crystal microbalance (QCM) sensors. The FET sensor detects the innate electric charges of the adsorbed protein at the electrode/solution interface, transforming the change in charge density into a potentiometric signal in real time, without the requirement for labels. In particular, using the Debye-Huckel model, the degree of potential shift was proportional to the dry mass of adsorbed albumin and β-casein. A comparison of the FET signal with SPR and QCM data provided information on the conformation and orientation of the surface-bound protein by observing characteristic break points in the correlation slopes between the signals. These slope transitions reflect a multistage process that occurs upon protein adsorption as a function of protein concentration, including interim coverage, film dehydration, and monolayer condensation. The FET biosensor, in combination with SPR and QCM, represents a new technology for interrogating protein-material interactions both quantitatively and qualitatively.
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Affiliation(s)
- Tatsuro Goda
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan.
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16
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Abstract
The ability of Tween 20 to reduce the adsorption of albumin on silicon surfaces of different hydrophobicity was investigated by ellipsometry. As expected, protein adsorption was found to depend on the degree of hydrophobicity of the surfaces and on the concentration of the surfactant. A reduction of 90% in albumin adsorption on hydrophobic methylated surfaces by 0.05% Tween 20 was achieved, whereas a reduction of only 15% on hydrophilic surfaces was observed. Experiments of time-dependent protein adsorption in both pure protein and protein-surfactant mixtures were conducted to ascertain the stability of physically adsorbed Tween 20 films on intermediate silicon surfaces. It was found that the adsorbed Tween 20 film was robust and there was no evidence of exchange of the Tween molecules with albumin for up to 240 min exposure. Adsorption minima were confirmed to correlate with minima in contact angle and critical micelle concentration (CMC). (c) 1997 John Wiley & Sons, Inc. Biotechnol Bioeng 56: 618-625, 1997.
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Affiliation(s)
- M Zhang
- Biomedical Microdevices Center, Department of Materials Science and Mineral Engineering, College of Engineering, University of California at Berkeley, Berkeley, California 94720
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17
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Wang H, Li L, Tong Q, Yan M. Evaluation of photochemically immobilized poly(2-ethyl-2-oxazoline) thin films as protein-resistant surfaces. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3463-71. [PMID: 21834589 PMCID: PMC3184304 DOI: 10.1021/am200690s] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Poly(2-ethyl-2-oxazoline) (PEOX) of various molecular weights were covalently immobilized on silicon wafers and gold slides to form protein-resistant surfaces via a fast and general photocoupling chemistry based on the CH insertion reaction of light-activated perfluorophenyl azide (PFPA). The thicknesses of the immobilized PEOX films ranged from 23 to 80 Å for molecular weight of 5000 to 500,000, and the grafting density reached 3.2 × 10(-3) Å(-2) for PEOX 5000. The protein-resistant property of the films was studied using bovine serum albumin (BSA) by fluorescence imaging, ellipsometry, and surface plasmon resonance imaging (SPRi). The fluorescence imaging and ellipsometry studies showed the largest amount of BSA adsorbed on PEOX 5000 and the smallest on PEOX 500,000. This was consistent with the kinetic analysis of BSA adsorption by SPRi showing that PEOX 5000 exhibited the fastest association rate and the slowest dissociation rate whereas PEOX 500,000 had the slowest association rate and the fastest dissociation rate. The PEOX film was then applied in the fabrication of carbohydrate microarrays to reduce the nonspecific adsorption of lectins and thus the background noises. Results showed that the microarray signals were significantly enhanced when the PEOX film was used.
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Affiliation(s)
- Hui Wang
- Department of Chemistry, Portland State University, P.O. Box 751, Portland, OR 97207-0751
| | - Liling Li
- Department of Chemistry, Portland State University, P.O. Box 751, Portland, OR 97207-0751
| | - Qi Tong
- Department of Chemistry, Portland State University, P.O. Box 751, Portland, OR 97207-0751
| | - Mingdi Yan
- Department of Chemistry, Portland State University, P.O. Box 751, Portland, OR 97207-0751
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18
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Wang H, Ren J, Hlaing A, Yan M. Fabrication and anti-fouling properties of photochemically and thermally immobilized poly(ethylene oxide) and low molecular weight poly(ethylene glycol) thin films. J Colloid Interface Sci 2011; 354:160-7. [PMID: 21044787 PMCID: PMC3053024 DOI: 10.1016/j.jcis.2010.10.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 10/01/2010] [Accepted: 10/02/2010] [Indexed: 11/26/2022]
Abstract
Poly(ethylene oxide) (PEO) and low molecular weight poly(ethylene glycol) (PEG) were covalently immobilized on silicon wafers and gold films by way of the CH insertion reaction of perfluorophenyl azides (PFPAs) by either photolysis or thermolysis. The immobilization does not require chemical derivatization of PEO or PEG, and polymers of different molecular weights were successfully attached to the substrate to give uniform films. Microarrays were also generated by printing polymer solutions on PFPA-functionalized wafer or Au slides followed by light activation. For low molecular weight PEG, the immobilization was highly dependent on the quality of the film deposited on the substrate. While the spin-coated and printed PEG showed poor immobilization efficiency, thermal treatment of the PEG melt on PFPA-functionalized surfaces resulted in excellent film quality, giving, for example, a grafting density of 9.2×10(-4)Å(-2) and an average distance between grafted chains of 33Å for PEG 20,000. The anti-fouling property of the films was evaluated by fluorescence microscopy and surface plasmon resonance imaging (SPRi). Low protein adsorption was observed on thermally-immobilized PEG whereas the photoimmobilized PEG showed increased protein adsorption. In addition, protein arrays were created using polystyrene (PS) and PEG based on the differential protein adsorption of the two polymers.
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Affiliation(s)
- Hui Wang
- Department of Chemistry, Portland State University, PO Box 751, Portland, OR, U.S.A. 97207-0751
| | - Jin Ren
- Department of Chemistry, Portland State University, PO Box 751, Portland, OR, U.S.A. 97207-0751
| | - Aye Hlaing
- Department of Chemistry, Portland State University, PO Box 751, Portland, OR, U.S.A. 97207-0751
| | - Mingdi Yan
- Department of Chemistry, Portland State University, PO Box 751, Portland, OR, U.S.A. 97207-0751
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Estephan ZG, Jaber JA, Schlenoff JB. Zwitterion-stabilized silica nanoparticles: toward nonstick nano. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:16884-16889. [PMID: 20942453 DOI: 10.1021/la103095d] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Using a short-chain zwitterionic organosiloxane, silica nanoparticles were stabilized against aggregation by high ionic strength and/or proteins. Turbidimetry and dynamic light scattering showed that "zwitterated" nanoparticles did not exhibit a significant increase in hydrodynamic radius. When challenged with 3 M NaCl or 50% fetal bovine serum, aggregation was inhibited for at least 24 h, longer with mild heat treatment, which produced nanoparticles with zero net surface charge. These findings suggest "zwitteration" of silica-capped nanoparticles provides excellent stability for in vivo circulation diagnostics and therapies.
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Affiliation(s)
- Zaki G Estephan
- Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States
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20
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Effect of swelling of poly(vinyl alcohol) layers on complement activation. Biomaterials 2010; 31:6926-33. [DOI: 10.1016/j.biomaterials.2010.05.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 05/23/2010] [Indexed: 11/19/2022]
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21
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Hold on at the Right Spot: Bioactive Surfaces for the Design of Live-Cell Micropatterns. ADVANCES IN POLYMER SCIENCE 2010. [DOI: 10.1007/12_2010_77] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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22
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Abstract
Ureteral stents find wide application in urology. The majority of patients with indwelling ureteral stents are at an increased risk of urinary tract infection. Stent encrustation and its associated complications lead to significant morbidity. This review critically evaluates various polymers that find their application as ureteral stents with regard to various issues such as encrustation, bacterial colonization, urinary tract infections, and related clinical issues. A complete literature survey was performed, and all the relevant articles were scrutinized thoroughly. We discuss issues of encrustation/biofilm formation, new approaches to their testing, polymers currently available for use, new biomaterials, coatings, and novel ureteral stent designs, thereby providing a complete update on recent advances in the development of stents. Finally, we discuss the future of biomaterial use in the urinary tract.
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Benhabbour SR, Liu L, Sheardown H, Adronov A. Protein Resistance of Surfaces Prepared by Chemisorption of Monothiolated Poly(ethylene glycol) to Gold and Dendronization with Aliphatic Polyester Dendrons: Effect of Hydrophilic Dendrons. Macromolecules 2008. [DOI: 10.1021/ma702074v] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Rahima Benhabbour
- Department of Chemistry and the Brockhouse Institute for Materials Research and Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Lina Liu
- Department of Chemistry and the Brockhouse Institute for Materials Research and Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Heather Sheardown
- Department of Chemistry and the Brockhouse Institute for Materials Research and Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4M1, Canada
| | - Alex Adronov
- Department of Chemistry and the Brockhouse Institute for Materials Research and Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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Yang SH, Lee YSJ, Lin FH, Yang JM, Chen KS. Chitosan/poly(vinyl alcohol) blending hydrogel coating improves the surface characteristics of segmented polyurethane urethral catheters. J Biomed Mater Res B Appl Biomater 2007; 83:304-13. [PMID: 17410571 DOI: 10.1002/jbm.b.30796] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Segmented polyurethane (SPU) is commonly used to manufacture urethral catheters. Surface modifications for SPU catheters are needed to reduce friction and protein adsorption, in order to minimize catheter-related complications, including urethral trauma, encrustation, catheter obstruction, bacterial colonization, and infection. In this study, a four-step surface modification method was developed to create a thin lubricious layer of chitosan/poly(vinyl alcohol) (PVA) hydrogel on the SPU catheter. Modification steps included oxidation of the SPU surface, functionalities modification, carbodiimide reaction and coupling, and hydrogel crosslinking. The success of each modification step was confirmed by Fourier transform infrared spectroscopy. Measurement of the water contact angle revealed that hydrogel coating created a highly hydrophilic surface and atomic force microscope analyses demonstrated that the surface was slippery. Protein absorption of the SPU catheter was significantly reduced by coating hydrogel. Chitosan in the hydrogel could provide antimicrobial activity, and the hydrogel coating SPU samples showed significant antibacterial effects in this study. In summary, the four-step modification method developed in this study provided a simple and effective way to coat the surface of SPU catheters with a chitosan/PVA blending hydrogel that could help to minimize the risk of complications related to the use of urethral catheters.
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Affiliation(s)
- Shu-Hua Yang
- Institute of Biomedical Engineering, College of Engineering and College of Medicine, National Taiwan University, Taipei, Taiwan
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25
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Kwon SH, Hong BJ, Park HY, Knoll W, Park JW. DNA–DNA interaction on dendron-functionalized sol–gel silica films followed with surface plasmon fluorescence spectroscopy. J Colloid Interface Sci 2007; 308:325-31. [PMID: 17291522 DOI: 10.1016/j.jcis.2007.01.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2006] [Revised: 12/21/2006] [Accepted: 01/05/2007] [Indexed: 11/16/2022]
Abstract
Since we observed that dendron-assembled surface provided high single nucleotide polymorphism discrimination efficiency for DNA microarrays, and that the binding yield for streptavidin increased when biotin was immobilized on top of it, the nanoscale-controlled surface is examined for surface plasmon field-enhanced fluorescence spectroscopy (or SPFS). Firstly, a silica film was coated onto a gold substrate using the sol-gel technique, followed by the covalent immobilization of a layer of second-generation dendrons with a DNA catcher strand at their apex. The thickness of the inorganic interlayer (d=33 nm) was effectively suppressing fluorescence quenching. Thus, the kinetics and affinity characteristics of DNA hybridization could be investigated very sensitively by SPFS. The kinetic rate constants found for DNA hybridization on the dendron-modified surface were larger than those reported for a streptavidin-modified surface by one order of magnitude, except for dissociation rate constant for a single mismatched case. In addition, we observed that the DNA on the cone-shaped linker maintained its capability to capture DNA target strands even after extended storage at ambient conditions.
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Affiliation(s)
- Sung Hong Kwon
- Center for Integrated Molecular Systems, Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
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26
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Wang CC, Lu JN, Young TH. The alteration of cell membrane charge after cultured on polymer membranes. Biomaterials 2007; 28:625-31. [PMID: 17014905 DOI: 10.1016/j.biomaterials.2006.09.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Accepted: 09/20/2006] [Indexed: 10/24/2022]
Abstract
In this work, cell electrophoresis, measuring the electrophoretic mobility of cells, was used to investigate the variation of surface charge property of cells after cultured on different polymer membranes. HepG2 cell line, derived from a well-differentiated, human hepatoma, was used as a model cell. The polymer biomaterials used in this study included polyvinyl alcohol (PVA), poly(ethylene-co-vinyl alcohol) (EVAL), and polyvinylidene fluoride (PVDF). For cells cultured in the presence of serum, cell mobility after being cultured on PVA substrates was considerably higher than that on EVAL or PVDF substrates. This effect was completely suppressed by cycloheximide (CHX) in the serum-free medium. Taken together, the cell surface charge property can be altered after cells cultured on different polymer substrates. The precise mechanism by which the variation of electrophoretic mobility of cultured cells is unknown, but it is reasonable to assume that the polymer substrates could influence the absorption of serum proteins on cell membrane surface to change cell electrophoretic mobility and, simultaneously, to regulate adhesion, growth and function of cultured cells.
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Affiliation(s)
- Chih-Chi Wang
- Department of Surgery, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Taiwan
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27
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Oh SJ, Hong BJ, Choi KY, Park JW. Surface Modification for DNA and Protein Microarrays. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2006; 10:327-43. [PMID: 17069511 DOI: 10.1089/omi.2006.10.327] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Microarrays of biomolecules are emerging as powerful tools for genomics, proteomics, and clinical assays, since they make it possible to screen biologically important binding events in a parallel and high throughput fashion. Because the microarrays are fabricated on a solid support, coating of the surface and immobilization strategy of the biomolecules are major issues for successful microarray fabrication. This review deals with both DNA microarrays and protein microarrays, and focuses on the various modification approaches for the two-dimensional surface materials and three-dimensional ones. In addition, the immobilization strategies including adsorption, covalent attachment, physical entrapment, and affinity attachment of the biomolecules are summarized, and advantage and limitation of representative efforts are discussed.
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Affiliation(s)
- Soon Jin Oh
- Department of Biomedical Science and Technology, Institute of Biomedical Science and Technology, Konkuk University, Seoul, Korea.
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28
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Wang C, St. Leger RJ. A collagenous protective coat enables Metarhizium anisopliae to evade insect immune responses. Proc Natl Acad Sci U S A 2006; 103:6647-52. [PMID: 16614065 PMCID: PMC1458935 DOI: 10.1073/pnas.0601951103] [Citation(s) in RCA: 203] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The ubiquitous fungal pathogen Metarhizium anisopliae kills a wide range of insects. Host hemocytes can recognize and ingest its conidia, but this capacity is lost on production of hyphal bodies. We show that the unusual ability of hyphal bodies to avoid detection depends on a gene (Mcl1) that is expressed within 20 min of the pathogen contacting hemolymph. A mutant disrupted in Mcl1 is rapidly attacked by hemocytes and shows a corresponding reduction of virulence to Manduca sexta. Mcl1 encodes a three domain protein comprising a hydrophilic, negatively charged N-terminal region with 14 cysteine residues, a central region comprising tandem repeats (GXY) characteristic of collagenous domains, and a C-terminal region that includes a glycosylphosphatidylinositol-dependent cell wall attachment site. Immunofluorescence assay showed that hyphal bodies are covered by the N-terminal domains of MCL1. The collagen domain became antibody accessible after treatment with DTT, suggesting that the N termini are linked by interchain disulfide bonds and are presented on the cell surface by extended collagenous fibers. Studies with staining reagents and hemocyte monolayers showed that MCL1 functions as an antiadhesive protective coat because it masks antigenic structural components of the cell wall such as beta-glucans, and because its hydrophilic negatively charged nature makes it unattractive to hemocytes. A survey of 54 fungal genomes revealed that seven other species have proteins with collagenous domains suggesting that MCL1 is a member of a patchily distributed gene family.
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Affiliation(s)
- Chengshu Wang
- Department of Entomology, University of Maryland, College Park, MD 20742
| | - Raymond J. St. Leger
- Department of Entomology, University of Maryland, College Park, MD 20742
- *To whom correspondence should be addressed. E-mail:
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29
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Hong BJ, Sunkara V, Park JW. DNA microarrays on nanoscale-controlled surface. Nucleic Acids Res 2005; 33:e106. [PMID: 16002785 PMCID: PMC1174902 DOI: 10.1093/nar/gni109] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2005] [Revised: 06/21/2005] [Accepted: 06/21/2005] [Indexed: 11/14/2022] Open
Abstract
We have developed new surface to ensure a proper spacing between immobilized biomolecules. While DNA microarray on this surface provided each probe DNA with ample space for hybridization with incoming target DNAs, the microarray showed enhanced discrimination efficiency for various types of single nucleotide polymorphism. The high discrimination efficiency holds for all tested cases (100:<1 for internal mismatched cases; 100:<28 for terminal mismatched ones). In addition, by investigating influence of hybridization temperature and washing condition on the fluorescence intensity and the discrimination efficiency with and without controlled mesospacing, it was observed that the nanoscale-controlled surface showed good discrimination efficiency in a wide range of temperature (37-50 degrees C), and hybridization behavior on the surface was in agreement with the solution one. Intriguingly, it was found that washing process after the hybridization was critical for the high discrimination efficiency. For the particular case, washing process was so efficient that only 30 s washing was sufficient to reach the optimal discrimination ratio.
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Affiliation(s)
- Bong Jin Hong
- Department of Chemistry, Center for Integrated Molecular Systems, Division of Molecular and Life Sciences, Pohang University of Science and TechnologyPohang 790-784, Korea
| | - Vijaya Sunkara
- Department of Chemistry, Center for Integrated Molecular Systems, Division of Molecular and Life Sciences, Pohang University of Science and TechnologyPohang 790-784, Korea
| | - Joon Won Park
- Department of Chemistry, Center for Integrated Molecular Systems, Division of Molecular and Life Sciences, Pohang University of Science and TechnologyPohang 790-784, Korea
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30
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Kim YW, Shick Ahn W, Kim JJ, Ha Kim Y. In situ fabrication of self-transformable and hydrophilic poly(ethylene glycol) derivative-modified polysulfone membranes. Biomaterials 2005; 26:2867-75. [PMID: 15603782 DOI: 10.1016/j.biomaterials.2004.08.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2004] [Accepted: 08/10/2004] [Indexed: 11/21/2022]
Abstract
A self-transformable sulfonated poly(ethylene glycol) acrylate diblock copolymer (PEG-SO3A/OA) entrapped into polysulfone membrane was studied. The asymmetric membrane structure was prepared by a phase inversion process. The induced hydrophilicity by reorientation of diblock copolymer at the interface was evaluated by contact angle measurement, platelet adhesion test, and electron spectroscopy for chemical analysis (ESCA) depth profiling with ion sputtering. Molecular dynamic (MD) simulations as a function of copolymer density were also performed to obtain optimum interfacial structure information. The dependency of water clustering behavior as a hydrophilicity parameter was described in terms of an atom-atom radial distribution function (RDF). The results showed that the sulfonated diblock copolymer enhanced the hydrophilicity and long-term stability more than the copolymer having no hydrophobic block. Also, according to the ESCA, oxygen composition significantly began to decrease along the membrane depth, indicating the reorientation of diblock chains. The copolymer-entrapped surfaces significantly induced the degree of water clustering, and the resulting equilibrium rearrangement of interfacial structure was distinctly dependent upon the density of the copolymer.
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Affiliation(s)
- Yong-Wan Kim
- Department of Chemical and Biomolecular Engineering, Sogang University, 1 Sinsu-Dong, Mapo-Gu, Seoul 121-742, Korea.
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31
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Park KD, Park HD, Lee HJ, Kim YH, Ooya T, Yui N. Sulfonated poly(ethylene glycol) containing methacrylate copolymer surfaces; preparation, characterization andin vitro biocompatibility. Macromol Res 2004. [DOI: 10.1007/bf03218410] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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32
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Wright JE, Cosman NP, Fatih K, Omanovic S, Roscoe SG. Electrochemical impedance spectroscopy and quartz crystal nanobalance (EQCN) studies of insulin adsorption on Pt. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.10.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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33
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Tang Y, Su TJ, Armstrong J, Lu JR, Lewis AL, Vick TA, Stratford PW, Heenan RK, Penfold J. Interfacial Structure of Phosphorylcholine Incorporated Biocompatible Polymer Films. Macromolecules 2003. [DOI: 10.1021/ma034647q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Zhao C, Liu X, Nomizu M, Nishi N. Blood compatible aspects of DNA-modified polysulfone membrane-protein adsorption and platelet adhesion. Biomaterials 2003; 24:3747-55. [PMID: 12818547 DOI: 10.1016/s0142-9612(03)00250-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
DNA was used as a biomaterial to modify the polysulfone (PSf) membrane by blending it with PSf. The blood compatibility of the membranes was then investigated. The water contact angle decreased, and the hydrophilicity increased when a single strand DNA was blended with PSf. Because of the hydrophilic surface, the DNA-blended PSf membranes had a lower protein adsorption than the PSf membrane, but it was not significantly decreased due to the interaction between the DNA and proteins. Circular dichroism (CD) spectroscopy was used to examine the changes in the secondary structure of the proteins after adsorption onto the polymer surface and desorption from the polymer surface into the SDS solution. The conformation of the proteins adsorbed onto the PSf membrane and desorbed from the PSf membrane significantly changed, but that of the proteins for the DNA-blended PSf membranes differed only slightly from the native one. The number of platelets that adhered on the surface of the DNA-blended PSf membranes was reduced compared to that on the PSf membrane. This suggested that DNA can be regarded as a biopolymer to modify PSf, and contributes to the hydrophilic and hemocompatible wipers on the surface of the hydrophobic PSf membranes.
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Affiliation(s)
- Changsheng Zhao
- Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, Kita-ku, 060-0810, Sapporo, Japan
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35
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Lee JH, Oh SH. MMA/MPEOMA/VSA copolymer as a novel blood-compatible material: effect of PEO and negatively charged side chains on protein adsorption and platelet adhesion. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2002; 60:44-52. [PMID: 11835158 DOI: 10.1002/jbm.10013] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This study was designed to evaluate the effect of polyethylene oxide (PEO) and negatively charged side chains on blood compatibility. For this, novel copolymers (MMA/MPEOMA/VSA copolymers) with both PEO and negatively chargeable side chains were synthesized by random copolymerization of methyl methacrylate (MMA), methoxy PEO monomethacrylate (MPEOMA; PEO mol wt 1000), and vinyl sulfonic acid sodium salt (VSA) monomers of different compositions. MMA/MPEOMA copolymer (with PEO side chains) and MMA/VSA copolymer (with negatively chargeable side groups) also were synthesized for purposes of comparison. The synthesized copolymers were characterized by 1H-nuclear magnetic resonance spectroscopy and gel permeation chromatography. They were coated onto polyurethane (PU) or polymethyl methacrylate (PMMA) films by spin coating. The surface properties of MMA/MPEOMA/VSA copolymers were compared by water contact angle and zeta potential with those of MMA/MPEOMA and MMA/VSA copolymers of similar MPEOMA or VSA composition. Using electron spectroscopy for chemical analysis and scanning electron microscopy, respectively, the behaviors of the adsorption of blood proteins (albumin, gamma-globulin, fibrinogen, and plasma proteins) and the adhesion of platelets on the copolymer-coated surfaces also were compared. Among the copolymers, the MMA/MPEOMA/VSA copolymer with a monomer molar ratio 8:1:1 was observed to be particularly effective in preventing both protein adsorption and platelet adhesion on the surfaces, probably owing to the combined effects of highly mobile, hydrophilic PEO side chains and negatively charged side groups in aqueous solution.
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Affiliation(s)
- Jin Ho Lee
- Department of Polymer Science and Engineering, Hannam University, 133 Ojeong Dong, Daedeog Ku, Taejon 306-791, Korea.
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36
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Clarke S, Davies MC, Roberts CJ, Tendler SJB, Williams PM, Lewis AL, Vincent O'Byrne. Atomic Force Microscope and Surface Plasmon Resonance Investigation of Polymer Blends of Poly([2-(methacryloyloxy)ethyl]phosphorylcholine-co-lauryl methacrylate) and Poly(lauryl methacrylate). Macromolecules 2001. [DOI: 10.1021/ma0016681] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Holmlin RE, Chen X, Chapman RG, Takayama S, Whitesides GM. Zwitterionic SAMs that Resist Nonspecific Adsorption of Protein from Aqueous Buffer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2001; 17:2841-2850. [PMID: 34139796 DOI: 10.1021/la0015258] [Citation(s) in RCA: 540] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This paper describes the use of surface plasmon resonance spectroscopy and self-assembled monolayers (SAMs) of alkanethiols on gold to evaluate the ability of surfaces terminating in different combinations of charged groups to resist the nonspecific adsorption of proteins from aqueous buffer. Mixed SAMs formed from a 1:1 combination of a thiol terminated in a trimethylammonium group and a thiol terminated in a sulfonate group adsorbed less than 1% of a monolayer of two proteins with different characteristics: fibrinogen and lysozyme. Single-component SAMs formed from thiols terminating in groups combining a positively charged moiety and a negatively charged moiety were also capable of resisting the adsorption of proteins. Single-component SAMs presenting single charges adsorbed nearly a full monolayer of protein. The amount of protein that adsorbed to mixed zwitterionic SAMs did not depend on the ionic strength or the pH of the buffer in which the protein was dissolved. The amount of protein that adsorbed to single-component zwitterionic SAMs increased as the ionic strength of the buffer decreased; it also decreased as the pH of the buffer increased (at constant ionic strength). Single-component zwitterionic SAMs composed of thiols terminating in N,N-dimethyl-amino-propane-1-sulfonic acid (-N+(CH3)2CH2CH2CH2SO3-) groups were substantially more effective at resisting adsorption of fibrinogen and lysozyme from buffer at physiological ionic strength and pH than single-component zwitterionic SAMs composed of thiols terminating in phosphoric acid 2-trimethylamino-ethyl ester (-OP(O)2-OCH2CH2N+(CH3)3). Several of these zwitterionic SAMs were comparable to the best known systems for resisting nonspecific adsorption of protein.
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Affiliation(s)
- R Erik Holmlin
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138
| | - Xiaoxi Chen
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138
| | - Robert G Chapman
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138
| | - Shuichi Takayama
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138
| | - George M Whitesides
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138
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38
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Banerjee P, Irvine DJ, Mayes AM, Griffith LG. Polymer latexes for cell-resistant and cell-interactive surfaces. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2000; 50:331-9. [PMID: 10737874 DOI: 10.1002/(sici)1097-4636(20000605)50:3<331::aid-jbm6>3.0.co;2-t] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Novel polymer latexes were prepared that can be applied in several ways for the control and study of cell behavior on surfaces. Acrylic latexes with glass transitions ranging from -30 to 100 degrees C were synthesized by dispersion polymerization in a water and alcohol solution using an amphiphilic comb copolymer as a stabilizing agent. The comb had a poly(methyl methacrylate) backbone and hydrophilic poly(ethylene glycol) (PEG) side chains, which served to stabilize the dispersion and create a robust hydrophilic coating on the final latex particles. The end groups of the comb stabilizer can be selectively functionalized to obtain latex particles with a controlled density of ligands tethered to their surfaces. Latexes were prepared with adhesion peptides (RGD) linked to the surface of the acrylic beads to induce attachment and spreading of cells. Coalesced films obtained from the RGD-bearing latex particles promoted attachment of WT NR6 fibroblasts, while films from unmodified latex particles were resistant to these cells. Additionally, RGD-linked beads were embedded in cell-resistant comb polymer films to create cell-interactive surfaces with discrete clustered-ligand domains. Cell attachment and morphology were seen to vary with the surface density of the RGD-bearing latex beads.
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Affiliation(s)
- P Banerjee
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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39
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Mcgurk SL, Sanders GHW, Davies MC, Davis SS, Illum L, Roberts CJ, Stolnik S, Tendler SJB, Williams PM. A High Resolution Atomic Force Microscopy Study of Poly(lactic acid-co-ethylene glycol). Polym J 2000. [DOI: 10.1295/polymj.32.444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Haigh R, Rimmer S, Fullwood NJ. Synthesis and properties of amphiphilic networks. 1: the effect of hydration and polymer composition on the adhesion of immunoglobulin-G to poly(laurylmethacrylate-stat-glycerolmonomethacrylate-stat-ethylene-gly col-dimethacrylate) networks. Biomaterials 2000; 21:735-9. [PMID: 10711970 DOI: 10.1016/s0142-9612(99)00245-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A series of hydrogels composed of varying fractions of dodecyl methacrylate (DM) and 2,3-dihydroxypropyl methacrylate (GM) were prepared using ethylene glycol dimethacrylate (EGDMA) as the cross-linking agent. The study found that for a series of gels with the same monomer ratio, bulk hydration could be controlled by adjusting the cross-link density. The ability to control cross-link density allowed the preparation of gels with the same bulk hydration but different ratios of the two monomers. The adsorption of IgG to the gels was investigated using ELISA. The aim of the project was to investigate the effect of the bulk hydration and polymer composition on IgG adsorption. The results show that for a series of gels with the same monomer ratio, there is a clear trend towards a reduction in protein adsorption as the bulk hydration and accompanying chain mobility of the gel increases. Studies on gels of the same bulk hydration but differing ratios of monomer show higher protein adsorption as the proportion of GM increases.
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Affiliation(s)
- R Haigh
- Department of Biological Sciences, Lancaster University, UK
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41
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Lee JH, Ju YM, Kim DM. Platelet adhesion onto segmented polyurethane film surfaces modified by addition and crosslinking of PEO-containing block copolymers. Biomaterials 2000; 21:683-91. [PMID: 10711965 DOI: 10.1016/s0142-9612(99)00197-0] [Citation(s) in RCA: 167] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Polyethylene oxide (PEO) surfaces were prepared by the addition of PEO-containing amphiphilic block copolymers as surface modifying additives and of dicumyl peroxide (DCP) as a crosslinking agent in segmented polyurethane (PU). PEO-polypropylene oxide-PEO triblock copolymers (Pluronics) with different PEO chain length (from 0 to 98) were used as the surface modifying additives. The PEO additives in the PU film were then crosslinked to be stably entrapped in the PU matrix. The crosslinking was done by free radicals produced from the decomposition of DCP in the film through heating (120 degrees C) or ultraviolet irradiation (254 nm). The surface properties of the PEO additive-entrapped PU films were investigated by the measurement of water contact angles and electron spectroscopy for chemical analysis. The bulk properties such as water absorption, long-term film stability, and tensile strength and elongation at break, were also investigated. It was observed that addition of a small amount (5 wt% based on PU) of the PEO additives resulted in a considerable change of surface characteristics. The PEO additives were stably entrapped in the PU films by crosslinking of them, without significant changes of bulk properties of the films. From the platelet adhesion test on the prepared PEO additive-containing film surfaces, it was observed that the platelet adhesion on the surfaces decreases with increase in PEO chain length of PEO additives. The film surface containing additive with long PEO chains (chain length of 98) was particularly effective in preventing platelet adhesion. The crosslinking of the PEO additives in PU films did not affect the behavior of platelet adhesion on the surfaces; the films with crosslinked PEO additives showed similar platelet adhesion on the surfaces to the films with uncrosslinked ones.
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Affiliation(s)
- J H Lee
- Department of Polymer Science and Engineering, Hannam University, Daedeog Ku, Taejon, South Korea.
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42
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Chen C, Walker AK, Wu Y, Timmons RB, Kinsel GR. Influence of sample preparation methodology on the reduction of peptide matrix-assisted laser desorption/ionization ion signals by surface-peptide binding. JOURNAL OF MASS SPECTROMETRY : JMS 1999; 34:1205-1207. [PMID: 10548814 DOI: 10.1002/(sici)1096-9888(199911)34:11<1205::aid-jms877>3.0.co;2-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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43
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Detrait E, Lhoest JB, Bertrand P, van den Bosch de Aguilar P. Fibronectin-pluronic coadsorption on a polystyrene surface with increasing hydrophobicity: relationship to cell adhesion. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1999; 45:404-13. [PMID: 10321714 DOI: 10.1002/(sici)1097-4636(19990615)45:4<404::aid-jbm16>3.0.co;2-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Recently, patterned polystyrene surfaces containing hydrophobic (PS) and more hydrophilic (PSox) areas have been shown to be capable of directing cellular growth, which is mainly due to the competitive adsorption of adhesive and antiadhesive molecules. In this article, the competitive adsorption between a pluronic surfactant and fibronectin was studied on homogeneous PS or PSox substrates conditioned with mixtures containing increasing concentrations of one of the two molecules. Radiolabeling and X-ray photoelectron spectroscopy techniques showed that fibronectin adsorption increased on both surfaces if the fibronectin concentrations increased in the conditioning mixture. In contrast, fibronectin adsorption decreased on PSox and did not occur on PS surfaces when pluronic concentrations increased in the coating mixture. A comparison of these data with pheochromocytoma and Schwann cells cultured on patterned surfaces showed that the direction of cell growth on PSox areas depended first on the relative concentrations of the two components in the mixtures, and second, on their ratio; the best concentration ratio probably depends on the cell's ability to recondition its support.
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Affiliation(s)
- E Detrait
- Unité de Biologie Animale (BANI), Université Catholique de Louvain, Louvain-la Neuve, Belgium
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44
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Detrait E, Lhoest JB, Knoops B, Bertrand P, van den Bosch de Aguilar P. Orientation of cell adhesion and growth on patterned heterogeneous polystyrene surface. J Neurosci Methods 1998; 84:193-204. [PMID: 9821651 DOI: 10.1016/s0165-0270(98)00114-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Studies of neurite outgrowth or cell migration, two important processes in neuronal networks formation, are facilitated by cell culture models capable of orientating cellular growth and of designing a well-defined cellular pattern. Heterogeneous polystyrene surfaces composed of oxygen plasma-treated stripes (PSox) with a low hydrophobicity separated by non-treated areas (PS) have these properties. In this study, to guide cell growth, we developed a cell culture model using these supports and we identified the molecular factors involved in cellular orientation. When the heterogeneous supports were not coated, proteins from a serum culture medium were required for cells to line up on PSox. On the other hand, cell orientation on coated surfaces was clearly influenced by competitive adsorption of adhesive proteins such as fibronectin or collagen and anti-adhesive molecules as pluronic F68 or albumin. Attachment factors were adsorbed on PSox stripes while adsorption of anti-adhesive molecules on the most hydrophobic PS areas prevented cell adhesion or growth. Thus, we describe the preparation of a cell culture substrate that succeeded in orientating cell growth and that led to a line of cells on adhesive PSox stripes ranging from 2 to 100 microns width.
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Affiliation(s)
- E Detrait
- Unité de Biologie Animale (BANI), Louvain-la-Neuve, Belgium.
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45
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Lee JH, Ju YM, Lee WK, Park KD, Kim YH. Platelet adhesion onto segmented polyurethane surfaces modified by PEO- and sulfonated PEO-containing block copolymer additives. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1998; 40:314-23. [PMID: 9549627 DOI: 10.1002/(sici)1097-4636(199805)40:2<314::aid-jbm17>3.0.co;2-l] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Polyethylene oxide (PEO) surfaces were prepared by the addition of PEO- and sulfonated PEO-containing amphiphilic block copolymers as surface-modifying additives in a segmented polyurethane (PU). PEO-PPO-PEO triblock copolymers (Pluronics) with different PEO chain lengths (from 2 to 80) were used as additives. The prepared film surfaces were characterized by the measurement of dynamic water contact angles and electron spectroscopy for chemical analysis. It was observed that the PU films containing 10 wt% of PEO additives were surface-saturated with the additives regardless of their PEO chain length, but the PEO chains were more projected from the film surfaces containing the additives with longer PEO chains. The water absorption of the films increased largely with the increasing PEO chain length of the additives. The addition of PEO additives produced film surfaces that were in a gel-like state. The films demonstrated some extraction of the PEO additives. However, the additives with higher molecular weights were entrapped more stably into the PU matrix. The mechanical properties (tensile strength and elongation) of the films were changed by the addition of PEO additives, but the differences were not significant compared to the control PU. The platelet adhesion on the film surfaces decreased with increasing PEO chain length of the additives. The film surface containing additives with long PEO chains (chain length of 80) was particularly effective in preventing platelet adhesion. The effect of negatively charged sulfonate groups on the prevention of platelet adhesion appeared only on the film surfaces containing additives with short PEO chains. For longer PEO chains, the chain mobility effect was more dominant than the negative charge effect on the prevention of platelet adhesion.
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Affiliation(s)
- J H Lee
- Department of Macromolecular Science, Hannam University, Taejon, Korea
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46
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Disley DM, Blyth J, Cullen DC, You HX, Eapen S, Lowe CR. Covalent coupling of immunoglobulin G to a poly(vinyl)alcohol-poly(acrylic acid) graft polymer as a method for fabricating the interfacial-recognition layer of a surface plasmon resonance immunosensor. Biosens Bioelectron 1998; 13:383-96. [PMID: 9642773 DOI: 10.1016/s0956-5663(97)00114-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The synthesis of a terminally thiolated poly(vinyl)alcohol (PVA) grafted with Poly (acrylic acid) (PAA) side chains is described. The PVA-PAA graft polymer (PVAg) was end-tethered to silver surfaces via the terminal thiol functionality and the resultant mobile, hydrophilic polymer matrix exploited for the covalent immobilization of large quantities of polyclonal goat (anti-hIgG) antibody (IgG) with low levels of non-specific adsorption. An SPR immunosensor, fabricated with an IgG-PVA-silver interfacial layer proved capable of performing a sensitive label-free assay of human IgG antigen (hIgG) with minimal non-specific binding interference. A detection limit (DL) for hIgG from serum of 0.8 microgram/ml (5 nM) and an assay sensitivity of 0.66 ng hIgG/mm2/nM are reported.
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Affiliation(s)
- D M Disley
- Institute of Biotechnology, University of Cambridge, UK
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47
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Francois P, Vaudaux P, Nurdin N, Mathieu HJ, Descouts P, Lew DP. Physical and biological effects of a surface coating procedure on polyurethane catheters. Biomaterials 1996; 17:667-78. [PMID: 8672628 DOI: 10.1016/0142-9612(96)86736-6] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Central venous catheters are widely used in clinical practice; however, complications such as venous thrombosis or infection are frequent. The physical and biological effects of a coating procedure designed to improve the blood-contacting properties of polyurethane central venous catheters (CVCs) were studied. The surface atomic composition of poly(vinyl pyrrolidone) (PVP)-coated or uncoated Pellethane single lumen CVCs was characterized by electron spectroscopy for chemical analysis (ESCA), which confirmed the presence of an oxygen-rich PVP layer on the former material. Topological analysis of both single and triple lumen CVCs by scanning force microscopy (SFM) revealed a very smooth surface in PVP-coated catheters compared to the more frequent surface irregularities found either in uncoated Pellethane or in four additional randomly selected, commercially available triple lumen polyurethane CVCs. The PVP-coated Pellethane showed a strong reduction in either fibrinogen or fibronectin adsorption compared to all other PVP-free polyurethane CVCs. This decreased protein adsorption led to a proportional reduction in protein-mediated adhesion of either Staphylococcus aureus or Staphylococcus epidermidis and in the binding of a monoclonal antibody directed against the cell-binding domain of fibronectin. Increased surface smoothness and hydrophilic properties of polyurethane CVCs might decrease the risk of bacterial colonization and infection.
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Affiliation(s)
- P Francois
- Division of Infectious Diseases, University Hospital, Geneva, Switzerland
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48
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Abstract
The research field of protein adsorption on surfaces appears to be as popular as ever. In the past year, several hundred published papers tackled problems ranging from fundamental aspects of protein surface interactions to applied problems of surface blood compatibility and protein surface immobilization. Although some parts of the protein adsorption process, such as kinetics and equilibrium interactions, can be accurately predicted, other aspects, such as the extent and the rate of protein conformational change, are still somewhat uncertain. The whole field is ripe for a comprehensive theory on protein adsorption.
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Affiliation(s)
- V Hlady
- Vladimir Hlady and Jos Buijs, Center for Biopolymers at Interfaces, Department of Bioengineering, 108 Biomedical Polymer Research Building, Salt Lake City, Utah 84112, USA
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49
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van Delden CJ, Bezemer JM, Engbers GH, Feijen J. Poly(ethylene oxide)-modified carboxylated polystyrene latices--immobilization chemistry and protein adsorption. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 1996; 8:251-68. [PMID: 9041040 DOI: 10.1163/156856296x00282] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
alpha,omega-Diamino poly(ethylene oxides) (PEOs) with different molecular weights (148, 1000, and 3400) were covalently immobilized onto carboxylated polystyrene latices. The immobilization of PEO was carried out with N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide (EDC) and N-hydroxysuccinimide (NHS) in aqueous media. The reaction conditions were optimized to obtain a maximal coupling of PEO. The degree of coupling was determined by the surface concentration of amino groups. The maximal surface concentrations of amino groups were close to what is expected for a complete coverage of the surface with PEO. Adsorption of albumin from a buffer solution onto PEO-containing surfaces was about 85% less than the albumin uptake by unmodified polystyrene latices. Protein adsorption from plasma dilutions was lower on surfaces containing PEO molecules with a higher molecular weight. The reduction of the protein uptake from plasma by surfaces containing PEO-3400 molecules was only 40% compared to the adsorption to unmodified surfaces. These results indicate that plasma proteins have a low affinity for surfaces modified with PEO. However the PEO modified surfaces are by no means 'protein resistant' when exposed to plasma.
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Affiliation(s)
- C J van Delden
- Department of Chemical Engineering, University of Twente, Enschede, The Netherlands
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50
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Attafuah E, Hall G. Preparation and evaluation of a low fouling ultrafiltration membrane made from a biopolymer. J Memb Sci 1995. [DOI: 10.1016/0376-7388(95)00163-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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