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Stagnoli S, Garro C, Ertekin O, Heid S, Seyferth S, Soria G, Mariano Correa N, Leal-Egaña A, Boccaccini AR. Topical Systems for the Controlled Release of Antineoplastic Drugs: Oxidized Alginate-Gelatin Hydrogel/Unilamellar Vesicles. J Colloid Interface Sci 2022; 629:1066-1080. [DOI: 10.1016/j.jcis.2022.08.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/09/2022] [Accepted: 08/25/2022] [Indexed: 11/24/2022]
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2
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Human Blood Platelets Adsorption on Polymeric Materials for Liquid Biopsy. SENSORS 2022; 22:s22134788. [PMID: 35808284 PMCID: PMC9269204 DOI: 10.3390/s22134788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 12/04/2022]
Abstract
Platelets are emerging as a promising source of blood biomarkers for several pathologies, including cancer. New automated techniques for easier manipulation of platelets in the context of lab-on-a-chips could be of great support for liquid biopsy. Here, several polymeric materials were investigated for their behavior in terms of adhesion and activation of human platelets. Polymeric materials were selected among the most used in microfabrication (PDMS, PMMA and COC) and commercial and home-made resins for 3D printing technology with the aim to identify the most suitable for the realization of microdevices for human platelets isolation and analysis. To visualize adherent platelets and their activation state scanning, electron microscopy was used, while confocal microscopy was used for evaluating platelets’ features. In addition, atomic force microscopy was employed to further study platelets adherent to the polymeric materials. Polymers were divided in two main groups: the most prone to platelet adhesion and materials that cause few or no platelets to adhere. Therefore, different polymeric materials could be identified as suitable for the realization of microdevices aimed at capturing human platelets, while other materials could be employed for the fabrication of microdevices or parts of microdevices for the processing of platelets, without loss on surfaces during the process.
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Kang S, Kim J, Kim S, Wufuer M, Park S, Kim Y, Choi D, Jin X, Kim Y, Huang Y, Jeon B, Choi TH, Park JU, Lee Y. Efficient reduction of fibrous capsule formation around silicone breast implants densely grafted with 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers by heat-induced polymerization. Biomater Sci 2020; 8:1580-1591. [DOI: 10.1039/c9bm01802f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article presents the efficacy of heat-induced MPC-grafting against excessive fibrous capsule formation and related inflammation in tissues surrounding silicone breast implants inserted in a pig model.
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Stagnoli S, Sosa Alderete L, Luna MA, Agostini E, Falcone RD, Niebylski AM, Correa NM. Catanionic nanocarriers as a potential vehicle for insulin delivery. Colloids Surf B Biointerfaces 2019; 188:110759. [PMID: 31887645 DOI: 10.1016/j.colsurfb.2019.110759] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 11/27/2019] [Accepted: 12/23/2019] [Indexed: 12/16/2022]
Abstract
Diabetes is a disease that affects millions of people in the World, constituting a global problem. Patients are administered insulin subcutaneous injections, resulting in high costs and frequent infections in the injection site. A possible solution to this problem may be the use of nanotechnology. Nanotransporters can act as specific release systems able to overcome the current limitations to drug delivery. Liposomes and vesicles can deliver drugs directly and efficiently to the site of action, decreasing toxicity and adverse effects. In previous studies, we demonstrated the biocompatibility and safety of catanionic benzyl n-hexadecyldimethylammonium 1,4 -bis-2-ethylhexylsulfosuccinate (BHD-AOT) vesicles using both in vitro and in vivo tests. Thus, the aims of this work were to evaluate the ability of the BHD-AOT vesicles to encapsulate insulin; to analyze the structural properties and stability of the system, vesicle-Insulin (VIn), at different pH conditions; and to study the ability of VIn to decrease the glycemia in miceby different administration routes. Our results showed that 2 and 5 mg mL-1 of vesicles were able to encapsulate about 55 % and 73 % of insulin, respectively. The system VIn showed a significant increase in size from 120 to 350 nm, changes in the surface zeta potential value, and high stability to different pH conditions. A significant decrease of the glycemia after VIn administration was demonstrated in in vivo assays, including the oral route. Our results reveal that BHD-AOT vesicles may be an appropriate system to encapsulate and protect insulin, and may be a potential system to be administrated in different ways as an alternative strategy to conventional therapy.
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Affiliation(s)
- Soledad Stagnoli
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Química. Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina.
| | - Lucas Sosa Alderete
- Instituto de Biotecnología Ambiental y Salud (INBIAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina
| | - M Alejandra Luna
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Química. Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina
| | - Elizabeth Agostini
- Instituto de Biotecnología Ambiental y Salud (INBIAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina
| | - R Dario Falcone
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Química. Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina
| | - Ana M Niebylski
- Instituto de Biotecnología Ambiental y Salud (INBIAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Biología Molecular, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina
| | - N Mariano Correa
- Instituto para el Desarrollo Agroindustrial y de la Salud (IDAS, UNRC-CONICET), Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina; Departamento de Química. Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 Km 601, X5804ZAB, Río Cuarto, Córdoba, Argentina.
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Ishihara K. Blood-Compatible Surfaces with Phosphorylcholine-Based Polymers for Cardiovascular Medical Devices. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1778-1787. [PMID: 30056709 DOI: 10.1021/acs.langmuir.8b01565] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
For the acquisition of blood-compatible materials, various hydrophilic polymers for surface modification have been examined. Among them, polymers with a representative phospholipid polar group, the phosphorylcholine (PC) group, are a successful example. These polymers were designed from inspiration of the cell membrane surface and provide protein adsorption resistance even following contact with plasma. This important property is based on the unique hydration state of water molecules surrounding hydrated polymer; in other words, water molecules weakly interact with the polymers and maintain their favorable cluster structure through hydrogen bonding. These polymers are not only hydrophilic, but also electrically neutral, important characteristics which make hydrogen bonding with water molecules less likely to occur and avoid hydrophobic interactions. Phosphorylcholine groups and other zwitterionic structures are significant as hydrophilic functional groups meeting these important requirements. In this review, blood compatibility of a polymer having a PC group is introduced in relation to its hydration structure, followed by a description of the applications of this polymer to cardiovascular medical devices.
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Affiliation(s)
- Kazuhiko Ishihara
- Department of Materials Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan
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6
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Abstract
The contact of any biomaterial with blood gives rise to multiple pathophysiologic defensive mechanisms such as activation of the coagulation cascade, platelet adhesion and activation of the complement system and leukocytes. The reduction of these events is of crucial importance for the successful clinical performance of a cardiovascular device. This can be achieved by improving the hemocompatibility of the device materials or by pharmacologic inhibition of the key enzymes responsible for the activation of the cascade reactions, or a combination of both. Different strategies have been developed during the last 20 years, and this article attempts to review the most significant, by dividing them into three main categories: bioinert or biopassive, biomimetic and bioactive strategies. With regard to bioactive strategies, particular attention is given to heparin immobilization and recent related technologies. References from both scientific literature and commercial sites are provided. Future development and studies are suggested.
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Affiliation(s)
- Maria Cristina Tanzi
- Politecnico di Milano, Bioengineering Department, P.zza L. da Vinci, Milano, Italy.
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Paul W, Sharma CP. Blood compatibility studies of Swarna bhasma (gold bhasma), an Ayurvedic drug. Int J Ayurveda Res 2013; 2:14-22. [PMID: 21897638 PMCID: PMC3157103 DOI: 10.4103/0974-7788.83183] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Accepted: 05/07/2011] [Indexed: 11/28/2022] Open
Abstract
Swarna bhasma (gold bhasma) preparations are widely utilized as therapeutic agents. However, in vitro biological evaluations of bhasma preparations are needed along with the physicochemical characterization for present day standardization of metallic bhasma preparations to meet the criteria that supports its use. Therefore, an attempt has been made to evaluate the protein adsorption, blood compatibility and complement activation potential of two batches of Swarna bhasma preparation, along with its physicochemical characterization. The particle size, morphology, elemental analysis, and in vitro cytotoxicity were evaluated initially. Red blood cell hemolysis, aggregation studies with blood cells, protein adsorption, complement C3 adsorption, platelet activation and tight junction permeability in Caco-2 cell line were investigated. The Swarna bhasma preparations with a crystallite size of 28–35 nm did not induce any blood cell aggregation or protein adsorption. Activation potential of these preparations towards complement system or platelets was negligible. These particles were also non-cytotoxic. Swarna bhasma particles opened the tight junctions in Caco-2 cell experiments. The results suggest the application of Swarna bhasma preparations as a therapeutic agent in clinical medicine from the biological safety point of view.
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Affiliation(s)
- Willi Paul
- Division of Biosurface Technology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, India
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9
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Antibacterial and antifouling catheter coatings using surface grafted PEG-b-cationic polycarbonate diblock copolymers. Biomaterials 2012; 33:6593-603. [DOI: 10.1016/j.biomaterials.2012.06.001] [Citation(s) in RCA: 255] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 06/02/2012] [Indexed: 12/30/2022]
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10
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Kumar KP, Paul W, Sharma CP. Green Synthesis of Silver Nanoparticles with Zingiber officinale Extract and Study of its Blood Compatibility. BIONANOSCIENCE 2012. [DOI: 10.1007/s12668-012-0044-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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11
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Hawkins ML, Grunlan MA. The protein resistance of silicones prepared with a PEO-silane amphiphile. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32322b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Kumar KP, Paul W, Sharma CP. Green synthesis of gold nanoparticles with Zingiber officinale extract: Characterization and blood compatibility. Process Biochem 2011. [DOI: 10.1016/j.procbio.2011.07.011] [Citation(s) in RCA: 222] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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13
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Liu Y, Wang W, Wang J, Wang Y, Yuan Z, Tang S, Liu M, Tang H. Blood compatibility evaluation of poly(D,L-lactide-co-beta-malic acid) modified with the GRGDS sequence. Colloids Surf B Biointerfaces 2009; 75:370-6. [PMID: 19811897 DOI: 10.1016/j.colsurfb.2009.09.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 08/16/2009] [Accepted: 09/13/2009] [Indexed: 10/20/2022]
Abstract
Endothelialization is an ideal approach to improve the blood compatibility of synthetic polymers. However, cell detachment is inevitable under shear flow conditions. Therefore, the issue of blood compatibility needs to be addressed for both the bare and the endothelialized polymer. RGD-containing polymer P-GS5 was synthesized by modification of poly(D,L-lactide-co-beta-malic acid) (PLMA) with the peptide GRGDS. The compositions, molecular weights and hydrophilicities of poly(D,L-lactide) (PDLLA), PLMA, and P-GS5 were characterized by nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), gel-permeation chromatography (GPC) and water contact angle measurements, respectively. The blood compatibilities of the bare and the endothelialized polymers were evaluated by clotting time and platelet adhesion tests. The results showed that the coagulation pathways were not influenced before and after cell culture; the bare P-GS5 attracted less platelet adhesion and induced lower pseudopodia extension compared with PDLLA and PLMA, and the platelet adhesion on P-GS5 was almost completely eliminated after cell seeding. The results suggest that P-GS5 could be a potentially useful material in vascular tissue engineering.
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Affiliation(s)
- Yuan Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
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14
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Lima MVS, Duek EAR, Santana CC. Adsorption of human immunoglobulin G to poly ( β-hydroxybutyrate) (PHB), poly (L- lactic Acid) (PLLA) and PHB/PLLA blends. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2009. [DOI: 10.1590/s0104-66322009000200003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Wang W, Liu Y, Wang J, Jia X, Wang L, Yuan Z, Tang S, Liu M, Tang H, Yu Y. A Novel Copolymer Poly(Lactide-co-β-Malic Acid) with Extended Carboxyl Arms Offering Better Cell Affinity and Hemacompatibility for Blood Vessel Engineering. Tissue Eng Part A 2009; 15:65-73. [DOI: 10.1089/ten.tea.2007.0394] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Wei Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, China
| | - Yuan Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, China
| | - Jun Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, China
| | - Xiaohua Jia
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, China
| | - Liang Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, China
| | - Zhi Yuan
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, China
| | - Shiming Tang
- Tianjin Life Science Research Center, Tianjin Medical University, Tianjin, China
| | - Min Liu
- Tianjin Life Science Research Center, Tianjin Medical University, Tianjin, China
| | - Hua Tang
- Tianjin Life Science Research Center, Tianjin Medical University, Tianjin, China
| | - Yaoting Yu
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Science, Nankai University, Tianjin, China
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Kumar AMS, Sivakova S, Fox JD, Green JE, Marchant RE, Rowan SJ. Molecular engineering of supramolecular scaffold coatings that can reduce static platelet adhesion. J Am Chem Soc 2008; 130:1466-76. [PMID: 18177047 DOI: 10.1021/ja0775927] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel supramolecular coatings that make use of low-molecular weight ditopic monomers with guanine end groups are studied using fluid tapping AFM. These molecules assemble on highly oriented pyrolytic graphite (HOPG) from aqueous solutions to form nanosized banding structures whose sizes can be systematically tuned at the nanoscale by tailoring the molecular structure of the monomers. The nature of the self-assembly in these systems has been studied through a combination of the self-assembly of structural derivatives and molecular modeling. Furthermore, we introduce the concept of using these molecular assemblies as scaffolds to organize functional groups on the surface. As a first demonstration of this concept, scaffold monomers that contain a monomethyl triethyleneglycol branch were used to organize these "functional" units on a HOPG surface. These supramolecular grafted assemblies have been shown to be stable at biologically relevant temperatures and even have the ability to significantly reduce static platelet adhesion.
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Affiliation(s)
- Aryavarta M S Kumar
- Center for Cardiovascular Biomaterials, Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA
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Murthy R, Cox CD, Hahn MS, Grunlan MA. Protein-Resistant Silicones: Incorporation of Poly(ethylene oxide) via Siloxane Tethers. Biomacromolecules 2007; 8:3244-52. [PMID: 17725363 DOI: 10.1021/bm700543c] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silicones with enhanced protein resistance were prepared by introducing poly(ethylene oxide) (PEO) chains via siloxane tethers (a-c) of varying lengths. Three unique ambifunctional molecules (a-c) having the general formula alpha-(EtO)3Si(CH2)2-oligodimethylsiloxanen-block-poly(ethylene oxide)8-OCH3 (n = 0 (a), 4, (b), and 13 (c)) were prepared via regioselective Rh-catalyzed hydrosilylation. Nine films were subsequently produced by the H3PO4-catalyzed sol-gel cross-linking of a-c each with alpha,omega-bis(Si-OH)polydimethylsiloxane (P, Mn = 3000 g/mol) in varying ratios (1:1, 1:2, and 2:3 molar ratio a, b, or c to P). Films prepared with a 2:3 molar ratio (a-c to P) contained the least amount of un-cross-linked materials, which may migrate to the film surface. For this set of films, surface hydrophilicity and protein resistance increased with siloxane tether length (a-c). These results indicate that PEO was more effectively mobilized to the surface if incorporated into silicones via longer siloxane tethers.
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Affiliation(s)
- Ranjini Murthy
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843-3120, USA
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18
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Immobilization of Thrombin Inhibitors on Polyesters Surface: An Original Approach towards Materials Blood Compatibilization. ACTA ACUST UNITED AC 2006. [DOI: 10.4028/www.scientific.net/msf.514-516.961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Piperazinyl-amide derivatives of N--(3-trifluoromethyl-benzenesulfonyl)-L-arginine were synthesized as graftable thrombin inhibitors. Their biological activity was evaluated in vitro, against human -thrombin, and in blood coagulation assay. The piperazinyl-amide derivatives were found to inhibit the activity of -thrombin in the micromolar range. The designed molecules were fixed on poly(ethylene terephthalate) (PET), and poly(butylene terephthalate) (PBT) by wet chemistry treatment (activation of hydroxyl chain-ends) and photochemistry (nitrene insertion by photoactivation of aromatic azide). The protocols were validated by X-ray photoelectron spectroscopy (XPS) and by radiochemical assay (liquid scintillation counting, LSC).
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Sperling C, Schweiss RB, Streller U, Werner C. In vitro hemocompatibility of self-assembled monolayers displaying various functional groups. Biomaterials 2005; 26:6547-57. [PMID: 15939466 DOI: 10.1016/j.biomaterials.2005.04.042] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2004] [Accepted: 04/15/2005] [Indexed: 11/17/2022]
Abstract
Self-assembled monolayers (SAMs) of alkanethiols with various terminating groups (-OH, -CH3, -COOH) and binary mixtures of these alkanethiols were studied with respect to their hemocompatibility in vitro by means of freshly taken human whole blood. The set of smooth monomolecular films with graded surface characteristics was applied to scrutinize hypotheses on the impact of surface chemical-physical properties on distinct blood activation cascades, i.e. to analyze -OH surface groups vs. complement activation, acidic surface sites vs. contact activation/coagulation and surface hydrophobicity vs. thrombogenicity. Blood and model surfaces were analyzed after incubation for the related hemocompatibility parameters. Our results show that the adhesion of leukocytes is abolished on a -CH3 surface and greatly enhanced on surfaces with -OH groups. The opposite was detected for the adhesion of platelets. A strong correlation between the activation of the complement system and the adhesion of leukocytes with the content of -OH groups could be observed. The contact activation for hydrophilic surfaces was found to scale with the amount of acidic surface sites. However, the coagulation and platelet activation did not simply correlate with any surface property and were therefore concluded to be determined by a superposition of contact activation and platelet adhesion.
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Affiliation(s)
- Claudia Sperling
- Department of Biocompatible Materials, Leibniz Institute of Polymer Research Dresden, The Max Bergmann Center of Biomaterials Dresden, 01069 Dresden, Germany
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Zhou J, Yuan J, Zang X, Shen J, Lin S. Platelet adhesion and protein adsorption on silicone rubber surface by ozone-induced grafted polymerization with carboxybetaine monomer. Colloids Surf B Biointerfaces 2005; 41:55-62. [PMID: 15698757 DOI: 10.1016/j.colsurfb.2004.11.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2004] [Revised: 11/07/2004] [Accepted: 11/09/2004] [Indexed: 11/18/2022]
Abstract
Platelet adhesion and protein adsorption on the silicone rubber film grafted with N,N'-dimethyl-N-methacryloyloxyethyl-N-(2-carboxyethyl) ammonium (DMMCA) was studied. The grafting was carried out by means of ozone-induced method and was confirmed by ATR-FTIR and XPS investigations. The grafted films possessed relatively hydrophilic surface revealed by contact angle measurement. The blood compatibility of the grafted film was evaluated in vitro by platelet adhesion in platelet-rich plasma (PRP) and protein absorption in bovine fibrinogen (BFG) using silicone film as the reference. No substantial platelet adhesion was observed for the grafted films incubated in PRP for 60 and 180 min. The protein absorption was also significantly reduced after incubated in bovine fibrinogen for 60 min. Both the results indicated that the blood compatibility of silicone rubber was greatly improved by ozone-induced grafting of carboxybetaine zwitterionic polymer onto its surface.
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Affiliation(s)
- Jun Zhou
- College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China
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Salvagnini C, Michaux C, Remiche J, Wouters J, Charlier P, Marchand-Brynaert J. Design, synthesis and evaluation of graftable thrombin inhibitors for the preparation of blood-compatible polymer materials. Org Biomol Chem 2005; 3:4209-20. [PMID: 16294249 DOI: 10.1039/b510239a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Piperazinyl-amide derivatives of N-alpha-(3-trifluoromethyl-benzenesulfonyl)-L-arginine (1) were synthesized as graftable thrombin inhibitors. The possible disturbance of biological activity due to a variable spacer-arm fixed on the N-4 piperazinyl position was evaluated in vitro, against human alpha-thrombin, and in blood coagulation assay. Molecular modelling (in silico analysis) and X-ray diffraction studies of thrombin-inhibitor complexes were also performed. The fixation of bioactive molecules on poly(butylene terephthalate) (PBT) and poly(ethylene terephthalate) (PET) membranes was performed by wet chemistry treatment and evaluated by XPS analysis. Surface grafting of inhibitor 1d improved the membrane hemocompatibility by reducing blood clot formation on the modified surface.
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Affiliation(s)
- Claudio Salvagnini
- Unité de Chimie Organique et Médicinale, Université catholique de Louvain, Bâtiment Lavoisier, place Louis Pasteur 1, B-1348, Louvain-la-Neuve, Belgium
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