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Luo YL, Chen LL, Miao Y, Xu F. Novel AB4-Type CTBN-b-MPEG PU Micelle-like Amphiphilic Block Copolymer Micelles for Prednisone Drug Release. Ind Eng Chem Res 2013. [DOI: 10.1021/ie3024164] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yan-Ling Luo
- Key Laboratory of Macromolecular
Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P.
R. China
| | - Li-Li Chen
- Key Laboratory of Macromolecular
Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P.
R. China
| | - Yan Miao
- Key Laboratory of Macromolecular
Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P.
R. China
| | - Feng Xu
- Key Laboratory of Macromolecular
Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, P.
R. China
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Yoon SS, Kim JH, Yoon JJ, Kim YJ, Park TG, Kim SC. Adhesion and growth of human umbilical vein endothelial cells on collagen-treated PU/PEGDA IPNs. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 17:765-80. [PMID: 16909944 DOI: 10.1163/156856206777656535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
For ideal non-thrombogenicity under normal physiologic conditions, we propose endothelialization. Endothelialization means that synthetic biomaterials are seeded by endothelial cells to mimic natural blood vessels. In our study, we synthesized amphiphilic polyurethane (PU)/poly(ethyleneglycol)diacrylate (PEGDA) interpenetrating polymer networks (IPNs) with different levels of surface energy to investigate the effect of adhesion and the growth of human umbilical vein endothelial cells (HUVECs). Collagen with cell-binding molecules was adsorbed on the surface of PU/PEGDA IPNs to enhance the adhesion of HUVECs. The morphology of collagens adsorbed on the IPN surfaces depends highly on the surface energy of the IPNs. As the surface becomes hydrophilic, there is greater aggregation of the adsorbed collagens on the IPN surface. The HUVECs successfully adhere to the collagen-immobilized IPN surface. The morphology of the endothelial cells (ECs) that adhere to IPN 2k-C and IPN 2k after 1 day and after 3 days incubation shows that ECs were successfully spread. The adhesion and the proliferation of ECs increase on non-treated IPN surfaces as the hydrophobicity of the IPNs increases. The surface energy of IPN 2k-C is suitable for the adhesion and proliferation of ECs. Therefore, platelet adhesion is significantly reduced on the EC-hybridized surface of IPNs.
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Affiliation(s)
- S S Yoon
- Center for Advanced Functional Polymers, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, Daejeon 305-701, South Korea
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Vertenten G, Vlaminck L, Gorski T, Schreurs E, Van Den Broeck W, Duchateau L, Schacht E, Gasthuys F. Evaluation of an injectable, photopolymerizable three-dimensional scaffold based on D: ,L: -lactide and epsilon-caprolactone in a tibial goat model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2761-2769. [PMID: 18305902 DOI: 10.1007/s10856-008-3404-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2007] [Accepted: 02/05/2008] [Indexed: 05/26/2023]
Abstract
An in situ crosslinkable, biodegradable, methacrylate-encapped porous bone scaffold composed of D: ,L: -lactide, epsilon-caprolactone, 1,6-hexanediol and poly(ortho-esters), in which crosslinkage is achieved by photoinitiators, was developed for bone tissue regeneration. Three different polymer mixtures (pure polymer and 30% bioactive glass or alpha-tricalcium phosphate added) were tested in a uni-cortical tibial defect model in eight goats. The polymers were randomly applicated in one of four (6.0 mm diameter) defects leaving a fourth defect unfilled. Biocompatibility and bone healing properties were evaluated by serial radiographies, histology and histomorphometry. The pure polymer clearly showed excellent biocompatibility and moderate osteoconductive properties. The addition of alpha-TCP increased the latter characteristics. This product offers potentials as a carrier for bone healing promoter substances.
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Affiliation(s)
- Geert Vertenten
- Department of Surgery and Anaesthesiology of Domestic Animals, Salisburylaan, Merelbeke, Belgium.
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Jin H, Yoon SS, Kim SC. Synthesis and characterization of interpenetrating polymer networks from polyurethane and poly(ethylene glycol) diacrylate. J Appl Polym Sci 2008. [DOI: 10.1002/app.28094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cao L, Chang M, Lee CY, Castner DG, Sukavaneshvar S, Ratner BD, Horbett TA. Plasma-deposited tetraglyme surfaces greatly reduce total blood protein adsorption, contact activation, platelet adhesion, platelet procoagulant activity, and in vitro thrombus deposition. J Biomed Mater Res A 2007; 81:827-37. [PMID: 17236214 DOI: 10.1002/jbm.a.31091] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The ability of tetraethylene glycol dimethyl ether (tetraglyme) plasma deposited coatings exhibiting ultralow fibrinogen adsorption to reduce blood activation was studied with six in vitro methods, namely fibrinogen and von Willebrand's factor adsorption, total protein adsorption, clotting time in recalcified plasma, platelet adhesion and procoagulant activity, and whole blood thrombosis in a disturbed flow catheter model. Surface plasmon resonance results showed that tetraglyme surfaces strongly resisted the adsorption of all proteins from human plasma. The clotting time in the presence of tetraglyme surfaces was lengthened compared with controls, indicating a lower activation of the intrinsic coagulation cascade. Platelet adhesion and thrombin generation by adherent platelets were greatly reduced on tetraglyme-coated materials, compared with uncoated and Biospan-coated glass slides. In the in vitro disturbed blood flow model, tetraglyme plasma coated catheters had 50% less thrombus than did the uncoated catheters. Tetraglyme-coated materials thus had greatly reduced blood interactions as measured with all six methods. The improved blood compatibility of plasma-deposited tetraglyme is thus not only due to their reduced platelet adhesion and activation, but also to a generalized reduction in blood interactions.
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Affiliation(s)
- Lan Cao
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA
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Cao L, Sukavaneshvar S, Ratner BD, Horbett TA. Glow discharge plasma treatment of polyethylene tubing with tetraglyme results in ultralow fibrinogen adsorption and greatly reduced platelet adhesion. J Biomed Mater Res A 2006; 79:788-803. [PMID: 16883583 DOI: 10.1002/jbm.a.30908] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Previous studies from our lab have shown that fibrinogen adsorption (Gamma(Fg)) must be reduced below 10 ng/cm(2) to significantly reduce platelet adhesion, and that radio frequency glow discharge (RFGD) treatment of polymeric films in the presence of tetraethylene glycol dimethyl ether (tetraglyme) can reduce Gamma(Fg) to the desired ultralow value. In this report, the effects of RFGD coatings of tetraglyme on the lumenal surface of PE tubing on Gamma(Fg) and on blood interactions both in vitro and ex vivo are described. Gamma(Fg) on the tetraglyme-coated PE tubing was reduced to the desired ultralow level (<10 ng/cm(2)), and we also observed a significant decrease in adsorption of von Willebrand's factor. In vitro platelet adhesion from washed platelet suspensions, platelet rich plasma, or whole blood to tetraglyme-coated PE tubing was decreased compared to PE, polyurethane, or silicone rubber tubes. In addition, thrombin generation by platelets adherent to tetraglyme-coated PE was also much less than by platelets adherent to PE. When inserted in an ex vivo carotid artery-carotid artery shunt in sheep, the RFGD tetraglyme-coated PE exhibited a very low number of adherent platelets compared to heparin-coated, chromic acid-etched, or plain PE. The RFGD tetraglyme-coated PE tubes exhibited high protein and platelet resistance in vitro, and high platelet resistance ex vivo. The improved hemocompatibility is attributed to the unique chemical structure of RFGD tetraglyme that makes it highly protein resistant.
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Affiliation(s)
- Lan Cao
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA
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Kim JH, Kim SC. Effect of synthesis temperature of PEO-grafted PU/PS IPNs on surface morphology and in vitro blood compatibility. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2004; 14:601-14. [PMID: 12901441 DOI: 10.1163/15685620360674281] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
When hydrophilic/hydrophobic polymers have a microdomain structure, platelet adhesion and activation are effectively suppressed by prohibition of the excessive assembly of glycoproteins and adenosine triphosphate (ATP) consumption of the platelets on the surface. In this study, poly(ethylene oxide)-grafted hydrophilic polyurethane (PU)/hydrophobic polystyrene (PS) interpenetrating polymer networks (IPNs) were synthesized by varying the synthesis temperature to control the phase separation and the microdomain surface structure, and the effect of the degree of phase separation on the in vitro blood compatibility. The size of the dispersed PS-rich domains in the PU-rich matrix decreased, and the hydrophilicity also decreased as the synthesis temperature of the PS network during the IPN synthesis was decreased, as the phase separation was suppressed during the synthesis. The amount of the adsorbed bovine plasma fibrinogens (BPF) on the PEO-grafted PU/PS IPNs decreased as the synthesis temperature was decreased, and the in vitro adhesion of the platelets was also suppressed on the PEO-grafted PU/PS IPNs prepared at lower temperature. The microdomain structure on the surface affected the adhesion and the activation of the adhered platelets, and the suppression of the phase separation resulted in the decrease of the domain size, which also enhanced the blood compatibility of the PEO-grafted PU/PS IPNs.
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Affiliation(s)
- J H Kim
- Center for Advanced Functional Polymers, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusong-gu, Taejon 305-701, South Korea
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Xie HQ, Wang GG, Guo JS. Behavior of polyoxyethylene-containing interpenetrating polymer networks and their LiCLO4 complexes as phase transfer catalysts and ionic conductors. J Appl Polym Sci 2003. [DOI: 10.1002/app.12494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kim JH, Kim SC. Effect of PEO Grafts on the Surface Properties of PEO-Grafted PU/PS IPNs: AFM Study. Macromolecules 2003. [DOI: 10.1021/ma0212137] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. H. Kim
- Center for Advanced Functional Polymers, Korea Advanced Institute of Science and Technology, 373-1 Gusong-dong, Yuseong-gu, Daejon 305-701, Korea
| | - S. C. Kim
- Center for Advanced Functional Polymers, Korea Advanced Institute of Science and Technology, 373-1 Gusong-dong, Yuseong-gu, Daejon 305-701, Korea
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Kim JH, Kim SC. PEO-grafting on PU/PS IPNs for enhanced blood compatibility--effect of pendant length and grafting density. Biomaterials 2002; 23:2015-25. [PMID: 11996043 DOI: 10.1016/s0142-9612(01)00330-1] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Polyurethane (PU) homopolymers and PU/polystyrene (PS) interpenetrating polymer networks (IPNs) were successfully synthesized changing the length of the pendant poly(ethylene oxide) (PEO) chains and the grafting density of PEO chains. All the PU/PS IPNs had the microphase-separated structures in which the PS-rich phase domains were dispersed in the matrix of the PU-rich phase. The domain size decreased a little, as the degree of grafting with PEO chains was increased. The water swelling ratio increased, and the interfacial energy decreased, as the length of the pendant PEO chains, and the grafting density of PEO chains of the PEO-grafted PU/PS IPNs were increased, since the mobile hydrophilic pendant PEO chains effectively induced and absorbed the water, when they were contacted with water. The hydrophilic and highly concentrated pendant PEO chains could easily prohibit the adhesion of the fibrinogens and the platelets on the surface, and the blood compatibility of IPNs was enhanced by increasing of grafting with PEO chains. The adsorption of the fibrinogens and the platelets was suppressed, as the length of pendant PEO chains, and the grafting density were increased.
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Affiliation(s)
- J H Kim
- Center for Advanced Functional Polymers, Korea Advanced Institute of Science and Technology, Taejon, South Korea
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Kim JH, Kim SC. Controlling the morphology of polyurethane/polystyrene interpenetrating polymer networks for enhanced blood compatibility. J Appl Polym Sci 2002. [DOI: 10.1002/app.10358] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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