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Fisher C, Shao H, Ho CH. Improved hemocompatibility of polysulfone hemodialyzers with Endexo® surface modifying molecules. J Biomed Mater Res B Appl Biomater 2021; 110:1335-1343. [PMID: 34951744 DOI: 10.1002/jbm.b.35003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 11/19/2021] [Accepted: 12/13/2021] [Indexed: 11/09/2022]
Abstract
Anticoagulation therapy is widely used to reduce clotting during hemodialysis (HD), but may cause adverse effects in end-stage kidney disease patients. A new hemodialyzer with a membrane modified by surface modifying molecule was developed to improve hemocompatibility that aimed to reduce the need for anticoagulation during dialysis treatments. We compared membrane surface characteristics and in vitro hemocompatibility of the new hemodialyzer to the standard polysulfone (PSF) hemodialyzer membrane. Scanning electron microscopy, contact angle measurement (68° ± 3° test vs. 41.6° ± 6° control), and X-ray photoelectron spectrometry measurement for fluorine atomic % (7.4% ± 0.4% test vs. not detectable control), showed that the membrane surface was modified with surface modifying macromolecule (SMM1) but maintained membrane structure and surface hydrophilicity. Zeta potential of the blood-contacting surface showed that the absolute surface charge was reduced at neutral pH (-3.3 mV ± 1.1 mV test vs. -15.6 mV ± 1.0 mV control). Platelet count reduction was significantly less for the SMM1-modified dialyzer (40.88% ± 21.89%) compared to the standard PSF dialyzer (62.62% ± 34.13%), along with Platelet Factor 4 (1824.10 ng/ml ± 436.26 ng/ml test vs. 2479.00 ng/ml ± 852.96 ng/ml control). These studies demonstrate the successful incorporation of SMM1 into the new hemodialyzer with the expected results. Our in vitro experiments indicate that the SMM1-modified hemodialyzers could improve hemocompatibility compared to standard PSF hemodialyzers and have the potential to minimize the patient's anticoagulant requirements during HD. Additional research with SMM1 additives incorporated into the entire dialysis circuit and use in a clinical settings are required to confirm these promising findings.
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Affiliation(s)
- Colleen Fisher
- Biosciences Department, Fresenius Medical Care North America Global Research and Development, Ogden, Utah, USA
| | - Hui Shao
- Product Development Department, Fresenius Medical Care North America Global Research and Development, Ogden, Utah, USA
| | - Chih-Hu Ho
- Biosciences Department, Fresenius Medical Care North America Global Research and Development, Ogden, Utah, USA
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Grainger DW. Fluorinated Biomaterials. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00012-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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3
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Palmerini T, Barozzi C, Tomasi L, Riva DD, Marengo M, Cicoria G, Bruno AG, Bacchi-Reggiani ML, Naldi M, Bartolini M, Fanti S, Galiè N, Stone GW. In vitro thrombogenicity of drug-eluting and bare metal stents. Thromb Res 2020; 185:43-48. [DOI: 10.1016/j.thromres.2019.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/08/2019] [Accepted: 11/13/2019] [Indexed: 11/16/2022]
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4
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Zhang L, Kong Q, Kong F, Liu T, Qian H. Synthesis and surface properties of novel fluorinated polyurethane base on F‐containing chain extender. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4802] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Long Zhang
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
- School of Chemistry and Materials ScienceNanjing University of Information Science and Technology Nanjing China
| | - Qinggang Kong
- School of Chemistry and Materials ScienceNanjing University of Information Science and Technology Nanjing China
| | - Fanxin Kong
- School of Chemistry and Materials ScienceNanjing University of Information Science and Technology Nanjing China
| | - Taolin Liu
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
| | - Haiyan Qian
- College of Materials Science and EngineeringNanjing Tech University Nanjing China
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5
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Sato N, Minami Y, Shimohama T, Kameda R, Tojo T, Ako J. Vascular response and intrastent thrombus in the early phase after drug-eluting versus bare-metal stent implantation in patients with ST-segment elevation myocardial infarction: An observational, single-center study. Health Sci Rep 2019; 2:e105. [PMID: 30697598 PMCID: PMC6346990 DOI: 10.1002/hsr2.105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 11/03/2018] [Accepted: 11/06/2018] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Second-generation drug-eluting stents (G2-DES) are associated with a lower rate of acute and subacute stent thrombosis compared with bare-metal stent (BMS) in the setting of ST-segment elevation myocardial infarction (STEMI). In this study, our aim was to compare the vascular response and thrombus burden between G2-DES and BMS in early-phase STEMI. METHODS Between May 2010 and August 2014, a total of 41 STEMI patients treated by either G2-DES (n = 26; everolimus-eluting stent [EES]: n = 15, zotarolimus-eluting stent [ZES]: n = 11) or BMS (n = 15) and, with multivessel disease requiring additional percutaneous coronary intervention (PCI), were prospectively enrolled. Optical coherence tomography (OCT) imaging was performed at 1 month after stent implantation. RESULTS Baseline clinical characteristics, except for age (61.5 ± 9.3 vs 69.3 ± 9.8, P = 0.01, t test), were comparable between patients with drug-eluting stent (DES) and BMS. The incidence of residual thrombus after the stent implantation for STEMI was comparable between DES and BMS (7.7% vs 6.7%, P = 0.88, χ 2 test). At 1 month, thrombus burden, defined as the mean thrombus area divided by the mean lumen area, was significantly smaller with DES than with BMS (median interquartile range (IQR), 1.2 (0.0, 1.0) vs 1.2 (0.0, 2.2), P = 0.04, Mann-Whitney U test), despite a similar percentage of malapposed (median (IQR), 6.2 (2.4, 9.0) vs 2.6 (0.0, 5.8)%, P = 0.07, Mann-Whitney U test) or uncovered struts (median (IQR), 6.8 (1.8, 13.1) vs 6.14 (2.8, 18.5)%, P = 0.45, Mann-Whitney U test). No significant difference in thrombus burden was observed between EES and ZES. CONCLUSIONS Thrombus burden was significantly smaller with DES than with BMS at 1-month follow-up in STEMI cases, although the percentage of malapposed or uncovered struts was similar between the groups. This may partly explain the lower rate of acute and subacute stent thrombosis in G2-DES that has previously been reported in the literature.
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Affiliation(s)
- Nobuhiro Sato
- Department of Cardiovascular MedicineKitasato University HospitalSagamiharaJapan
| | - Yoshiyasu Minami
- Department of Cardiovascular MedicineKitasato University HospitalSagamiharaJapan
| | - Takao Shimohama
- Department of Cardiovascular MedicineKitasato University HospitalSagamiharaJapan
| | - Ryo Kameda
- Department of Cardiovascular MedicineKitasato University HospitalSagamiharaJapan
| | - Taiki Tojo
- Department of Cardiovascular MedicineKitasato University HospitalSagamiharaJapan
| | - Junya Ako
- Department of Cardiovascular MedicineKitasato University HospitalSagamiharaJapan
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6
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Zhou Y, Zhang Q, Wu J, Xi C, Meyerhoff ME. Synthesis and Characterization of a Fluorinated S-Nitrosothiol as the Nitric Oxide Donor for Fluoropolymer-Based Biomedical Device Applications. J Mater Chem B 2018; 6:6142-6152. [PMID: 31105961 PMCID: PMC6516761 DOI: 10.1039/c8tb01814f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fluorinated polymers are widely used as biomaterials in various biomedical implant and device applications. However, thrombogenicity, surface-induced inflammation, and risk of microbial infection remain key issues that can limit their use. In this work, we describe the first nitric oxide (NO) releasing fluorinated polymer, in which a new fluorinated NO donor, S-nitroso-N-pentafluoropropionylpenicillamine (C2F5-SNAP), is incorporated within the polyvinylidene fluoride (PVDF) tubing. The synthesis, decomposition kinetics, and NO-release characteristics of the C2F5-SNAP species are described in detail. Then, using a simple solvent swelling method, we demonstrate that C2F5-SNAP can readily be doped into PVDF tubing. The resulting tubing can release NO for 11 days under physiological conditions, with an NO flux > 0.5 × 10-10 mol/cm2·min over the first 7 days. Due to fluorous-fluorous interactions, the leaching of the fluorinated NO donor and its decomposed products is shown to be very low (less than 5 nmol/mg, total). Further, the new NO-releasing PVDF tubing exhibits significant antimicrobial activity (compared to undoped PVDF tubing) against both gram positive and negative S. aureus and P. aeruginosa bacterial strains over a 7 d test period. This new NO-releasing fluorinated polymer is likely to have the potential to improve the biocompatibility and antimicrobial activity of various biomedical devices.
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Affiliation(s)
- Yang Zhou
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Qi Zhang
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Jianfeng Wu
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
| | - Chuanwu Xi
- Department of Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA
| | - Mark E Meyerhoff
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
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Su SK, Gu JH, Lee HT, Wu CL, Su YR, Suen MC. Biodegradable polyurethanes: novel effects of the fluorine-containing chain extender on the thermal, physical and water vapor permeation properties. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1607-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Surface fluorination of polylactide as a path to improve platelet associated hemocompatibility. Acta Biomater 2018; 78:23-35. [PMID: 30036719 DOI: 10.1016/j.actbio.2018.07.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/18/2018] [Accepted: 07/19/2018] [Indexed: 12/11/2022]
Abstract
Surface-induced thrombosis is still a significant clinical concern for many types of blood-contacting medical devices. In particular, protein adsorption and platelet adhesion are important events due to their ability to trigger the coagulation cascade and initiate thrombosis. Poly(lactic acid) (PLA) has been the predominant polymer used for making bioresorbable stents. Despite long-term advantages, these stents are associated with higher rates of early thrombosis compared with permanent metallic stents. To address this issue, we modified the surface of PLA with a perfluoro compound facilitated by surface activation using radio frequency (RF) plasma. Fluoropolymers have been extensively used in blood contacting materials, such as blood vessel replacements due to their reduced thrombogenicity and reduced platelet reactivity. The compositions of plasma-treated surfaces were determined by electron spectroscopy for chemical analysis (ESCA). Also, contact angle measurements, cell cytotoxicity and the degradation profile of the treated polymers are presented. Finally, relevant blood compatibility parameters, including plasma protein adsorption, platelet adhesion and morphology, were evaluated. We hypothesized that tight binding of adsorbed albumin by fluoropolymers enhances its potential for blood-contacting applications. STATEMENT OF SIGNIFICANCE Although bioresorbable stents made from poly(lactic acid) (PLA) may have long-term clinical advantages, they have shown higher rates of early thrombosis as compared with permanent metallic stents. To improve the thromboresistance of PLA, we developed a novel method for surface fluorination of this polymer with a perfluoro compound. Fluoropolymers (e.g., expanded polytetrafluoroethylene) have long been used in blood-contacting applications due to their satisfactory clinical performance. This is the first report of PLA surface fluorination which might be applied to the fabrication of a new generation of fluorinated PLA stents with improved platelet interaction, tunable degradability and drug release capabilities. Also, we describe a general strategy for improving the platelet interactions with biomaterials based on albumin retention.
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Mori H, Jinnouchi H, Diljon C, Torii S, Sakamoto A, Kolodgie FD, Virmani R, Finn AV. A new category stent with novel polyphosphazene surface modification. Future Cardiol 2018; 14:225-235. [DOI: 10.2217/fca-2017-0103] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The COBRA-PzF™ (CeloNova BioSciences, Inc., TX, USA) is a new type of coronary stent composed of a cobalt chromium metallic backbone surrounded by a nanothin layer of Polyzene-F (PzF) without any added drug. Evidence from basic studies supports antithrombotic and anti-inflammatory properties for the PzF surface coating. Preclinical studies support the thromboresistance of PzF-coated surfaces and clinical studies have shown good outcomes for patients receiving this device with very low rates of stent thrombosis. COBRA-PzF may be especially useful in patients at high risk for bleeding. Ongoing clinical trials will determine whether shortening the duration of dual antiplatelet therapy to less than 1 month is feasible and these data may represent a new paradigm with regards to patients at high risk for bleeding.
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Affiliation(s)
| | | | - Chahal Diljon
- University of Maryland, School of Medicine, Baltimore, MD 21201, USA
| | - Sho Torii
- CVPath Institute, Gaithersburg, MD 20878, USA
| | | | | | | | - Aloke V Finn
- CVPath Institute, Gaithersburg, MD 20878, USA
- University of Maryland, School of Medicine, Baltimore, MD 21201, USA
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10
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Mori H, Otsuka F, Gupta A, Jinnouchi H, Torii S, Harari E, Virmani R, Finn AV. Revisiting the role of durable polymers in cardiovascular devices. Expert Rev Cardiovasc Ther 2017; 15:835-846. [DOI: 10.1080/14779072.2017.1386098] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Hiroyoshi Mori
- Department of Pathology, CVPath Institute, Gaithersburg, MD, USA
| | - Fumiyuki Otsuka
- Department of Pathology, CVPath Institute, Gaithersburg, MD, USA
| | - Anuj Gupta
- Department of Cardiology, University of Maryland, School of Medicine, Baltimore, MD, USA
| | | | - Sho Torii
- Department of Pathology, CVPath Institute, Gaithersburg, MD, USA
| | - Emanuel Harari
- Department of Pathology, CVPath Institute, Gaithersburg, MD, USA
| | - Renu Virmani
- Department of Pathology, CVPath Institute, Gaithersburg, MD, USA
| | - Aloke V. Finn
- Department of Pathology, CVPath Institute, Gaithersburg, MD, USA
- Department of Cardiology, University of Maryland, School of Medicine, Baltimore, MD, USA
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11
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Mori H, Gupta A, Torii S, Harari E, Jinnouchi H, Virmani R, Finn AV. Clinical implications of blood-material interaction and drug eluting stent polymers in review. Expert Rev Med Devices 2017; 14:707-716. [PMID: 28770625 DOI: 10.1080/17434440.2017.1363646] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Despite advances in drug-eluting stent (DES) technology, stent thrombosis (ST) remains the most feared complication with high morbidity and mortality. Areas covered: Stent related factors certainly play a role in the pathophysiology of ST and more recent data suggest coating technologies have the potential to favorable modify this risk though blood material interactions. Of the polymer coatings used in DES, fluorinated polymers in particular have shown significant promise in modifying the risk of ST through their preferential interactions with albumin which is believed to prevent the adhesion and aggregation of platelets to the stent surface and thus minimize thrombus formation. Preclinical data from the porcine arteriovenous fistula model and clinical data from large network meta-analysis support a role for fluorinated polymers in reducing ST. Expert commentary: The search for more biocompatible anti-thrombotic polymer coatings continues and it is likely that further modification of stent based surfaces will revolutionize the field of interventional cardiology by one day obviating the need for systemic anti-platelet therapies in patients receiving intravascular devices.
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Affiliation(s)
- Hiroyoshi Mori
- a Department of Pathology , CVPath institute , Gaithersburg , MD , USA
| | - Anuj Gupta
- b School of Medicine , University of Maryland , Baltimore , MD , USA
| | - Sho Torii
- a Department of Pathology , CVPath institute , Gaithersburg , MD , USA
| | - Emanuel Harari
- a Department of Pathology , CVPath institute , Gaithersburg , MD , USA
| | | | - Renu Virmani
- a Department of Pathology , CVPath institute , Gaithersburg , MD , USA
| | - Aloke V Finn
- a Department of Pathology , CVPath institute , Gaithersburg , MD , USA.,b School of Medicine , University of Maryland , Baltimore , MD , USA
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Lavery KS, Rhodes C, Mcgraw A, Eppihimer MJ. Anti-thrombotic technologies for medical devices. Adv Drug Deliv Rev 2017; 112:2-11. [PMID: 27496703 DOI: 10.1016/j.addr.2016.07.008] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 06/03/2016] [Accepted: 07/26/2016] [Indexed: 01/08/2023]
Abstract
Thrombosis associated with medical devices may lead to dramatic increases in morbidity, mortality and increased health care costs. Innovative strategies are being developed to reduce this complication and provide a safe biocompatible interface between device and blood. This article aims to describe the biological phenomena underlying device-associated thrombosis, and surveys the literature describing current and developing technologies designed to overcome this challenge. To reduce thrombosis, biomaterials with varying topographical properties and incorporating anti-thrombogenic substances on their surface have demonstrated potential. Overall, there is extensive literature describing technical solutions to reduce thrombosis associated with medical devices, but clinical results are required to demonstrate significant long-term benefits.
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Affiliation(s)
- Karen S Lavery
- Preclinical Sciences, Boston Scientific Corporation, 100 Boston Scientific Way, Marlborough, MA 01752-1234, United States
| | - Candace Rhodes
- Preclinical Sciences, Boston Scientific Corporation, 100 Boston Scientific Way, Marlborough, MA 01752-1234, United States
| | - Adam Mcgraw
- Preclinical Sciences, Boston Scientific Corporation, 100 Boston Scientific Way, Marlborough, MA 01752-1234, United States
| | - Michael J Eppihimer
- Preclinical Sciences, Boston Scientific Corporation, 100 Boston Scientific Way, Marlborough, MA 01752-1234, United States
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13
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Yang Y, Bteich J, Li SD. Current Update of a Carboxymethylcellulose-PEG Conjugate Platform for Delivery of Insoluble Cytotoxic Agents to Tumors. AAPS JOURNAL 2016; 19:386-396. [PMID: 27873118 DOI: 10.1208/s12248-016-0014-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 11/07/2016] [Indexed: 12/18/2022]
Abstract
Cytotoxic chemotherapeutic agents are used as the standard therapy for a range of significant cancers, but many of these drugs suffer from poor water solubility and low selectivity, limiting their clinical efficacy. To overcome these shortcomings, Cellax™ drug delivery platform was developed. Cellax™ is a polymer-based nanoparticle drug delivery system designed to solubilize hydrophobic drugs and target them to solid tumors, thereby enhancing the efficacy and reducing the side effects. Cellax-docetaxel (Cellax-DTX) displayed improved pharmacokinetic, safety, and efficacy profiles compared to native DTX (Taxotere®) and Nab-paclitaxel (Nab-PTX, Abraxane®) in multiple animal models. Cellax-DTX was shown to interact with serum albumin and SPARC (secreted protein acidic and rich in cysteine) that is highly expressed by tumor stromal cells, leading to superior stroma depleting activity in orthotopic breast and pancreatic tumor models and subsequently reduced incidence of visceral metastases compared to free DTX and Nab-PTX. The Cellax™ platform was employed to deliver podophyllotoxin (Cellax-PPT) and cabazitaxel (Cellax-CBZ), and increased their safety and efficacy against multidrug-resistant tumors. This review discusses the rational design of the Cellax™ platform and summarizes the preclinical results. A multifunctional version of Cellax™ and a biomarker for predicting Cellax™ efficacy were developed and identified to promote the personalized use. Perspectives and future plans for this platform technology are also provided.
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Affiliation(s)
- Yang Yang
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver Campus, 5519-2405 Wesbrook Mall, Vancouver, British Columbia, V6T 1Z3, Canada
| | - Joseph Bteich
- Drug Delivery and Formulation, Drug Discovery Program, Ontario Institute for Cancer Research, 661 University Avenue, Suite 510, Toronto, Ontario, M5G 0A3, Canada
| | - Shyh-Dar Li
- Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver Campus, 5519-2405 Wesbrook Mall, Vancouver, British Columbia, V6T 1Z3, Canada.
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Fibronectin adsorption on surface-modified polyetherurethanes and their differentiated effect on specific blood elements related to inflammatory and clotting processes. Biointerphases 2016; 11:029809. [PMID: 27246517 DOI: 10.1116/1.4950887] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
After the introduction of a medical device into the body, adhesive proteins such as fibronectin (Fn) will adsorb to the surface of the biomaterial. Monocytes (MCs) will interact with these adsorbed proteins, and adopt either a proinflammatory and/or prowound healing phenotype, thereby influencing many blood interaction events including thrombogenesis. In this work, Fn adsorption as well as subsequent MC response and thrombus formation were investigated on two surfaces-modified polyetherurethanes (PEUs) using different surface modifiers: an anionic/dihydroxyl oligomeric (ADO) additive, known to enable cell adhesion, and a fluorinated polypropylene oxide oligomer (PPO), known to reduce platelet adhesion. Results indicated that at 24 h of MC culture, PEU-ADO and PEU-PPO promoted an anti-inflammatory character relative to the base PEU. Longer clotting times, based on a free hemoglobin assay, were also found on the two surface-modified PEUs relative to the native one, suggesting their potential for the reduction of thrombus formation. In presence of a Fn monolayer, the surface-modified PEUs conserved a lower thrombogenic character than the base PEU, and was however significantly decreased when compared to prior protein adsorption. Furthermore, Fn coatings increased the MC production levels of tumor necrosis factor-α and interleukin-10 at 24 h, while not affecting the anti-inflammatory effect of the modifications relative to the base PEU. This finding was most prominent on PEU-PPO, suggesting that the interaction of the adsorbed Fn with blood cells was different for the two additives. Hence, the results highlighted differentiating effects of Fn adsorption on specific blood activating processes related to inflammatory and thrombotic responses.
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Braune S, Zhou S, Groth B, Jung F. Quantification of adherent platelets on polymer-based biomaterials. Comparison of colorimetric and microscopic assessment. Clin Hemorheol Microcirc 2016; 61:225-36. [PMID: 26410874 DOI: 10.3233/ch-151995] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND Platelet adhesion to artificial surfaces is one of the most important indicators for the thrombogenicity of implant materials. Currently, a variety of enzyme activity-based colorimetric assays or microscopy-based techniques are commonly in use to assess this characteristic. Studies about how data of colorimetric assays correlate with the image-based quantification of adherent platelets are scarce. To address this question, the present study compared two colorimetric assays (lactate dehydrogenase (LDH) and acid phosphatase (ACP)) with an image-based quantification of the density of platelets adhering on polymer-based biomaterial surfaces. MATERIALS AND METHODS Tri-sodium citrated whole blood was collected from apparently healthy subjects and platelet rich plasma (PRP) was prepared according to a standardized protocol. An in vitro static thrombogenicity test was applied to study platelet adhesion from PRP adjusted to 50,000 platelets per μL on three different polymers: medical grade polytetrafluoroethylene (PTFE), silicone and polyethylene terephthalate (PET). For the direct image-based approach, surface adherent platelets were fixed, fluorescently labelled and microscopically visualized. The image-based determination of platelet densities provided reference values for the comparison with data of the colorimetric assays. Correlation between standard platelet concentrations and ACP/LDH absorbance measurements were analysed to estimate accuracy and association of both parameters. ACP and LDH release from resting and ADP-stimulated platelets was studied to estimate how platelet activation influences colorimetric assay results. RESULTS The density of adherent platelets ranged from 15,693 ± 2,487 platelets·mm-2 (PTFE) to 423 ± 99 platelets·mm-2 (silicone) and 4,621 ± 1,427 platelets·mm-2 (PET) and differed significantly between the three polymers (ANOVA: p < 0.05). Correlation coefficients between microscopic and colorimetric determination of platelet densities ranged between r = 0.93 (LDH, p < 0.001) and r = 0.94 (ACP, p < 0.001). ACP absorbance measurements of platelet standards with different concentrations corresponded well to an ideal linear regression, while LDH data either deceeded or exceeded the expected values. The LDH release during ADP-induced platelet activation was significantly higher compared to the release of ACP. CONCLUSION For an adjusted platelet concentration of 50,000 platelets·μL-1, both colorimetric assays (ACP and LDH) allowed a similar accurate quantification of the mean platelet density compared to the microscopic evaluation. Better linearity of the assay standards, less variability of the results and a lower influence of platelet activation on the measurements mark the ACP assay as more suitable for the assessment of material surface adherent platelets compared to the LDH assay, particularly, if near physiological platelet concentrations are applied.
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Affiliation(s)
- S Braune
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - S Zhou
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Tianjin University, Helmholtz-Zentrum Geesthacht, Joint Laboratory for Biomaterials and Regenerative Medicine, Teltow, Germany
| | - B Groth
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - F Jung
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
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Szott LM, Irvin CA, Trollsas M, Hossainy S, Ratner BD. Blood compatibility assessment of polymers used in drug eluting stent coatings. Biointerphases 2016; 11:029806. [PMID: 27083991 PMCID: PMC5014517 DOI: 10.1116/1.4944586] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 02/29/2016] [Accepted: 03/03/2016] [Indexed: 11/17/2022] Open
Abstract
Differences in thrombosis rates have been observed clinically between different drug eluting stents. Such differences have been attributed to numerous factors, including stent design, injury created by the catheter delivery system, coating application technologies, and the degree of thrombogenicity of the polymer. The relative contributions of these factors are generally unknown. This work focuses on understanding the thrombogenicity of the polymer by examining mechanistic interactions with proteins, human platelets, and human monocytes of a number of polymers used in drug eluting stent coatings, in vitro. The importance for blood interactions of adsorbed albumin and the retention of albumin was suggested by the data. Microscopic imaging and immunostaining enhanced the interpretation of results from the lactate dehydrogenase cell counting assay and provided insight into platelet interactions, total quantification, and morphometry. In particular, highly spread platelets may be surface-passivating, possibly inhibiting ongoing thrombotic events. In many of the assays used here, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) showed a differentiated protein deposition pattern that may contribute to the explanation of the consistently thromboresistant blood-materials interaction for fluororpolymers cited in literature. These results are supportive of one of several possible factors contributing to the good thromboresistant clinical safety performance of PVDF-HFP coated drug eluting stents.
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Affiliation(s)
- Luisa Mayorga Szott
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Colleen A Irvin
- Department of Bioengineering, University of Washington, Seattle, Washington 98195
| | - Mikael Trollsas
- Abbott Vascular, Innovation Incubator, Santa Clara, California 95052
| | - Syed Hossainy
- Abbott Vascular, Innovation Incubator, Santa Clara, California 95052
| | - Buddy D Ratner
- Department of Bioengineering, University of Washington, Seattle, Washington 98195 and Department of Chemical Engineering, University of Washington, Seattle, Washington 98195
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17
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Liu Q, Li D, Zhan W, Luan Y, Du H, Liu X, Brash JL, Chen H. Surfaces having dual affinity for plasminogen and tissue plasminogen activator: in situ plasmin generation and clot lysis. J Mater Chem B 2015; 3:6939-6944. [DOI: 10.1039/c5tb01308a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In situ activation of a surface-integrated zymogen was achieved by introducing affinity ligands for both the zymogen and its activator.
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Affiliation(s)
- Qi Liu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - Dan Li
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - Wenjun Zhan
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - Yafei Luan
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - Hui Du
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - Xiaoli Liu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - John L. Brash
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
| | - Hong Chen
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- P. R. China
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18
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Lopez-Donaire ML, Santerre JP. Surface modifying oligomers used to functionalize polymeric surfaces: Consideration of blood contact applications. J Appl Polym Sci 2014. [DOI: 10.1002/app.40328] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- M. Luisa Lopez-Donaire
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Ontario Canada
- Faculty of Dentistry; University of Toronto; Ontario M5G 1G6 Canada
| | - J. Paul Santerre
- Institute of Biomaterials and Biomedical Engineering; University of Toronto; Ontario Canada
- Faculty of Dentistry; University of Toronto; Ontario M5G 1G6 Canada
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19
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Srokowski EM, Woodhouse KA. Surface and adsorption characteristics of three elastin-like polypeptide coatings with varying sequence lengths. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:71-84. [PMID: 23053802 PMCID: PMC3540362 DOI: 10.1007/s10856-012-4772-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Accepted: 09/17/2012] [Indexed: 06/01/2023]
Abstract
The surface properties of a family of elastin-like polypeptides (ELPs), differing in molecular weight and sequence length, were investigated to understand how the nature of the polypeptide film might contribute to their thrombogenic profile. Physical adsorption of the ELPs onto Mylar increased surface wettability as the sequence length decreased while X-ray spectroscopy analysis showed an increasing amide content with sequence length. Chemical force microscopy analysis revealed that the ELP-coated surfaces displayed purely hydrophilic adhesion forces that increased as the ELP sequence length decreased. Adsorption isotherms performed using the quartz crystal microbalance with dissipation, showed that the surface coverage increased with ELP sequence length. The longer polypeptides (ELP2 and ELP4) also displayed higher specific dissipation values indicating that they established films with greater structural flexibility and associated water content than the shorter polypeptide, ELP1. Additionally, the stability of the ELP coating was lower with the shorter polypeptides. This study highlights the different surface properties of the ELP coatings as well as the dynamic nature of the ELP adsorbed layer wherein the conformational state may be an important factor contributing to their blood response.
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Affiliation(s)
- Elizabeth M. Srokowski
- Department of Chemical Engineering and Applied Science, University of Toronto, Toronto, ON Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON Canada
| | - Kimberly A. Woodhouse
- Department of Chemical Engineering and Applied Science, University of Toronto, Toronto, ON Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON Canada
- Department of Chemical Engineering, Queen’s University, Kingston, ON Canada
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20
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Liu G, Fan W, Li L, Chu PK, Yeung KW, Wu S, Xu Z. Novel anionic fluorine-containing amphiphilic self-assembly polymer micelles for potential application in protein drug carrier. J Fluor Chem 2012. [DOI: 10.1016/j.jfluchem.2012.05.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Srokowski EM, Blit PH, McClung WG, Brash JL, Santerre JP, Woodhouse KA. Platelet Adhesion and Fibrinogen Accretion on a Family of Elastin-Like Polypeptides. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 22:41-57. [DOI: 10.1163/092050609x12578498935594] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- E. M. Srokowski
- a Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - P. H. Blit
- b Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - W. G. McClung
- c Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada; Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - J. L. Brash
- d Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada; Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada; School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada
| | - J. P. Santerre
- e Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada; Department of Biomaterials, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - K. A. Woodhouse
- f Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada; Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada; Department of Chemical Engineering, Queen's University, Kingston, ON, Canada
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22
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Wu Z, Chen H, Liu X, Brash JL. Protein-Resistant and Fibrinolytic Polyurethane Surfaces. Macromol Biosci 2011; 12:126-31. [DOI: 10.1002/mabi.201100211] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 08/12/2011] [Indexed: 12/18/2022]
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23
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Platelet inhibition and endothelial cell adhesion on elastin-like polypeptide surface modified materials. Biomaterials 2011; 32:5790-800. [DOI: 10.1016/j.biomaterials.2011.04.067] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Accepted: 04/23/2011] [Indexed: 11/20/2022]
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24
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Blit PH, Battiston KG, Woodhouse KA, Santerre JP. Surface immobilization of elastin-like polypeptides using fluorinated surface modifying additives. J Biomed Mater Res A 2011; 96:648-62. [DOI: 10.1002/jbm.a.33022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2010] [Revised: 11/08/2010] [Accepted: 12/01/2010] [Indexed: 11/09/2022]
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25
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Nonckreman CJ, Fleith S, Rouxhet PG, Dupont-Gillain CC. Competitive adsorption of fibrinogen and albumin and blood platelet adhesion on surfaces modified with nanoparticles and/or PEO. Colloids Surf B Biointerfaces 2010; 77:139-49. [DOI: 10.1016/j.colsurfb.2010.01.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 01/07/2010] [Accepted: 01/21/2010] [Indexed: 10/19/2022]
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26
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Xiong SD, Li L, Jiang J, Tong LP, Wu S, Xu ZS, Chu PK. Cationic fluorine-containing amphiphilic graft copolymers as DNA carriers. Biomaterials 2010; 31:2673-85. [PMID: 20034666 DOI: 10.1016/j.biomaterials.2009.12.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 12/03/2009] [Indexed: 01/02/2023]
Abstract
A series of cationic fluorine-containing amphiphilic graft copolymers P(HFMA-St-MOTAC)-g-PEG comprising poly(hexafluorobutyl methacrylate) (PHFMA) poly(methacryl oxyethyl trimethylammonium chloride) (PMOTAC) polystyrene (PSt) backbones and poly(ethylene glycol) (PEG) side chains are synthesized as a type of non-viral gene vector. The copolymers self-assemble into spherical micelles in the aqueous media and turbidity and cytotoxicity measurements show that those micelles have excellent dispersive stability and low cytotoxicity. The interactions between the copolymers and calf-thymus DNA are studied by fluorescence spectroscopy and viscosity. The former discloses electrostatic interaction, hydrophobic interaction, and hydrogen bonding in the copolymer/DNA system, whereas the latter indicates that these graft copolymers can bind DNA via the electrostatic and classical intercalation modes. The DNA-binding capacity determined by the gel retardation assay and UV-visible spectrophotometry shows that the copolymers have good binding capacity to DNA and a high charge density or HFMA content in the copolymers bode well for DNA-binding. Transmission electron microscopy, photon correlation spectroscopy, and zeta potential data reveal that stable colloidal complexes (particles) can form easily between the copolymer micelles and DNA. Our results suggest that the copolymers are a promising non-viral vector in a gene delivery system.
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Affiliation(s)
- Sheng-Dong Xiong
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China
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27
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Xiong SD, Li L, Wu SL, Xu ZS, Chu PK. Synthesis and properties of fluorine-containing amphiphilic graft copolymer P(HFMA)-g-P(SPEG). ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23541] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Le Clair S, Nguyen K, Chen Z. Sum Frequency Generation Studies on Bioadhesion: Elucidating the Molecular Structure of Proteins at Interfaces. THE JOURNAL OF ADHESION 2009; 85:484-511. [PMID: 20625467 PMCID: PMC2898208 DOI: 10.1080/00218460902996374] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The study of bioadhesion is significant to applications in a variety of scientific fields. Techniques that are surface sensitive need to be utilized to examine these kinds of systems because bioadhesion occurs at the interface between two surfaces. Recently, Sum Frequency Generation (SFG) has been applied to investigate different bioadhesive processes because of its intrinsic surface specificity, excellent sensitivity and its ability to perform experiments in situ. SFG studies on the bioadhesion of fibrinogen, factor XII and mefp-3 on various surfaces will be discussed in this review.
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Affiliation(s)
| | | | - Zhan Chen
- Department of Chemistry, 930 North University Avenue, University of Michigan, Ann Arbor, Michigan, 48109, USA
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29
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Jin Z, Feng W, Beisser K, Zhu S, Sheardown H, Brash JL. Protein-resistant polyurethane prepared by surface-initiated atom transfer radical graft polymerization (ATRgP) of water-soluble polymers: Effects of main chain and side chain lengths of grafts. Colloids Surf B Biointerfaces 2009; 70:53-9. [DOI: 10.1016/j.colsurfb.2008.12.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Revised: 11/20/2008] [Accepted: 12/03/2008] [Indexed: 10/21/2022]
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30
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Chen KY, Kuo JF. Influence of fluorocarbon chains on the crystallization behaviors of aliphatic polyurethanes. J Appl Polym Sci 2009. [DOI: 10.1002/app.29049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Kurt P, Gamble LJ, Wynne KJ. Surface characterization of biocidal polyurethane modifiers having poly(3,3-substituted)oxetane soft blocks with alkylammonium side chains. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:5816-5824. [PMID: 18444667 DOI: 10.1021/la800203y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This paper focuses on surface characterization of P[ AB] copolyoxetane soft block polyurethanes having either fluorous (3FOx, -CH2OCH 2CF3) or PEG-like (ME2Ox, -CH2(OCH2CH2) 2OCH3), A side chains and alkylammonium, B side chains. Physical surface characterization data were analyzed in light of the previously observed order of antimicrobial effectiveness for a set of four surface modifiers. Ample physical evidence for surface concentration of fluorous 2 wt % P[ AB]-polyurethane modifiers was obtained from XPS, contact angles, ATR-IR spectroscopy, and TM-AFM. In TM-AFM phase imaging, the most effective biocidal surface modifier, 2 wt % HMDI-BD(30)/P[(3FOx)(C12)-0.89:0.11]-PU, showed a nanoscale phase-separated structure consisting of 200 nm domains with background features about 10 times smaller. Despite similar surface characterization data, the 2 wt % fluorous C6 analog ranked third in contact biocidal effectiveness. Physical evidence for surface concentration of 2 wt % P[(ME2Ox)(C12)-0.86:0.14]-PU was modest, considering that antimicrobial effectiveness was second only to 2 wt % HMDI-BD(30)/P[(3FOx)(C12)-0.89:0.11]-PU. In this set of surface modifiers, nanoscale morphology is largely driven by the fluorous component, whereas antimicrobial effectiveness is more strongly influenced by alkylammonium chain length. The effect of alkylammonium side chain length on surface concentration and antimicrobial behavior is more pronounced for ME2Ox polyurethanes compared to the 3FOx analogs.
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Affiliation(s)
- Pinar Kurt
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
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