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Santra A, Prakash R, Maity S, Nilawar S, Chatterjee K, Maiti P. Core-Shell Structure of Photopolymer-Grafted Polyurethane as a Controlled Drug Delivery Vehicle for Biomedical Application. ACS APPLIED MATERIALS & INTERFACES 2024; 16:17193-17207. [PMID: 38532651 DOI: 10.1021/acsami.3c19155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Functionalized ultraviolet photocurable bisphenol A-glycerolate dimethacrylates with tailorable size have been synthesized as the core, which have further been grafted using the diisocyanate chain end of polyurethane (PU) as the shell to create a core-shell structure of tunable size for a controlled drug delivery vehicle. The core-shell structure has been elucidated through spectroscopic techniques like 1H NMR, FTIR, and UV-vis and their relative shape and size through TEM and AFM morphology. The greater cross-link density of the core is reflected in the higher glass transition temperature, and the improved thermal stability of the graft copolymer is proven from its thermogravimetric analyses. The flow behavior and enhanced strength of the graft copolymers have been revealed from rheological measurements. The graft copolymer exhibits sustained release of the drug, as compared to pure polyurethane and photopolymer, arising from its core-shell structure and strong interaction between the copolymer and drug, as observed through a significant shifting of absorption peaks in FTIR and UV-vis measurements. Biocompatibility has been tested for the real application of the novel graft copolymer in medical fields, as revealed from MTT assay, cell imaging, and cell adhesion studies. The efficacy of controlled release from a graft copolymer has been verified from the gradual cell killing and ∼70% killing in 3 days vs meager cell killing of ∼25% very quickly in 1 day, followed by the increased cell viability of the system treated with the pure drug. The mechanism of slow and controlled drug release from the core-shell structure has been explored. The fluorescence images support the higher cell-killing efficiency as opposed to a pure drug or a drug embedded in polyurethane. Cells seeded on 3D scaffolds have been developed by embedding a graft copolymer, and fluorescence imaging confirms the successful growth of cells within the scaffold, realizing the potential of the core-shell graft copolymer in the biomedical arena.
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Affiliation(s)
- Amita Santra
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Ravi Prakash
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Swapan Maity
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Sagar Nilawar
- Department of Materials Engineering, Indian Institute of Science, C.V. Raman Avenue, Bangalore 560012, India
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, C.V. Raman Avenue, Bangalore 560012, India
| | - Pralay Maiti
- School of Materials Science and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India
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Wang Y, Yang S, Cai H, Hu H, Hu K, Sun Z, Liu R, Wei Y, Han L. A dual-crosslinking electroactive hydrogel based on gelatin methacrylate and dibenzaldehyde-terminated telechelic polyethylene glycol for 3D bio-printing. Sci Rep 2024; 14:4118. [PMID: 38374394 PMCID: PMC10876640 DOI: 10.1038/s41598-024-54853-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/17/2024] [Indexed: 02/21/2024] Open
Abstract
Gelatin was widely used as scaffold materials in 3D bio-printing due to its excellent bioactivity and availability and especially that their arginine-glycine-aspartic acid (RGD) sequences could efficiently promote cell adhesion and proliferation. In this study, an electroactive and 3D bio-printable hydrogel was prepared through a two-step chemical cross-linking process. Specifically, residual free amino groups of methacrylated gelatin (GelMA) were cross-linked with the aldehyde groups of dibenzaldehyde-terminated telechelic polyethylene glycol (DF-PEG) via Schiff base bonds, forming a gel at 37 °C. During the subsequent 3D bio-printing process, GelMA underwent UV curing, forming a secondary cross-linked network to the mechanical strength and stability of the printed structure. The uniform dispersion of carbon nanotubes (CNTs) in the GelMA/DF-PEG composite hydrogel significantly increased its conductivity. The optimized GelMA/DF-PEG composite hydrogel, i.e., 30% GelMA and 25% DF-PEG (G30D25-CNTs), exhibited superior bio-printability. When the content of CNTs was above 4%, the conductivity of G30D25-CNTs hydrogel exceeded 10-2 S/m, which satisfied the needs of cells for micro-current stimulation. Furthermore, the pore microstructures, swelling behavior, degradation ability and cell toxicity of G30D25-CNTs electroactive hydrogels were thoroughly evaluated. Thus, the G30D25-CNTs hydrogel with 4% MWCNTs could be considered for further application in electrical stimulation of tissue regeneration such as muscle and cardiac nerve tissue repair.
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Affiliation(s)
- Yulong Wang
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
- School of Physical Science and Technology, Guangxi University, Nanning, 530004, China
| | - Songsong Yang
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Heqing Cai
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Hailong Hu
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Kun Hu
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Zhicheng Sun
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Ruping Liu
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China
| | - Yen Wei
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China.
- The Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, China.
| | - Lu Han
- The Engineering Research Center of 3D Printing and Bio-Fabrication, Beijing Institute of Graphic Communication, Beijing, 102600, China.
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Investigation of Cell Adhesion and Cell Viability of the Endothelial and Fibroblast Cells on Electrospun PCL, PLGA and Coaxial Scaffolds for Production of Tissue Engineered Blood Vessel. J Funct Biomater 2022; 13:jfb13040282. [PMID: 36547542 PMCID: PMC9782893 DOI: 10.3390/jfb13040282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/27/2022] [Accepted: 12/04/2022] [Indexed: 12/13/2022] Open
Abstract
Endothelialization of artificial scaffolds is considered an effective strategy for increasing the efficiency of vascular transplantation. This study aimed to compare the biophysical/biocompatible properties of three different biodegradable fibrous scaffolds: Poly (ɛ-caprolactone) (PCL) alone, Poly Lactic-co-Glycolic Acid (PLGA) alone (both processed using Spraybase® electrospinning machine), and Coaxial scaffold where the fiber core and sheath was made of PCL and PLGA, respectively. Scaffold structural morphology was assessed by scanning electron microscope and tensile testing was used to investigate the scaffold tension resistance over time. Biocompatibility studies were carried out with human umbilical vein endothelial cells (HUVEC) and human vascular fibroblasts (HVF) for which cell viability (and cell proliferation over a 4-day period) and cell adhesion to the scaffolds were assessed by cytotoxicity assays and confocal microscopy, respectively. Our results showed that all biodegradable polymeric scaffolds are a reliable host to adhere and promote proliferation in HUVEC and HVF cells. In particular, PLGA membranes performed much better adhesion and enhanced cell proliferation compared to control in the absence of polymers. In addition, we demonstrate here that these biodegradable membranes present improved mechanical properties to construct potential tissue-engineered vascular graft.
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Xiong W, Wang S, Wei Z, Cai Y, Li B, Lin F, Xia D. Knowledge Domain and Hotspots Predict Concerning Electroactive Biomaterials Applied in Tissue Engineering: A Bibliometric and Visualized Analysis From 2011 to 2021. Front Bioeng Biotechnol 2022; 10:904629. [PMID: 35677303 PMCID: PMC9168279 DOI: 10.3389/fbioe.2022.904629] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/09/2022] [Indexed: 01/11/2023] Open
Abstract
Objective: Electroactive biomaterials used in tissue engineering have been extensively studied. Electroactive biomaterials have unique potential advantages in cell culture and tissue regeneration, which have attracted the attention of medical researchers worldwide. Therefore, it is important to understand the global scientific output regarding this topic. An analysis of publications on electroactive biomaterials used in tissue engineering over the past decade was performed, and the results were summarised to track the current hotspots and highlight future directions.Methods: Globally relevant publications on electroactive biomaterials used in tissue engineering between 2011 and 2021 were extracted from the Web of Science database. The VOSviewer software and CiteSpace were employed to visualise and predict trends in research on the topic.Results: A total of 3,374 publications were screened. China contributed the largest number of publications (995) and citations (1581.95, actual value ×0.05). The United States achieved the highest H-index (440 actual values ×0.05). The journal Materials Science & Engineering C-materials for Biological Applications (IF = 7.328) published the most studies on this topic (150). The Chinese Academy of Science had the largest number of publications (107) among all institutions. The publication titled Nanotechnological strategies for engineering complex tissues by Dir, T of the United States had the highest citation frequency (985 times). Regarding the function of electroactive materials, the keyword “sensors” emerged in recent years. Regarding the characterisation of electroactive materials, the keyword “water contact angle” appeared lately. Regarding electroactive materials in nerve and cardiac tissue engineering, the keywords “silk fibroin and conductive hydrogel” appeared recently. Regarding the application of electroactive materials in bone tissue engineering, the keyword “angiogenesis” emerged in recent years. The current research trend indicates that although new functional materials are constantly being developed, attention should also be paid to their application and transformation in tissue engineering.Conclusion: The number of publications on electroactive biomaterials used in tissue engineering is expected to increase in the future. Topics like sensors, water contact angle, angiogenesis, silk fibroin, and conductive hydrogels are expected to be the focuses of research in the future; attention should also be paid to the application and transformation of electroactive materials, particularly bone tissue engineering. Moreover, further development of the field requires joint efforts from all disciplines.
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Affiliation(s)
- Wentao Xiong
- Department of Orthopedic, Hainan Hospital of Chinese PLA General Hospital, Sanya, China
| | - Sheng Wang
- Department of Emergency, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Ziheng Wei
- Department of Orthopedics, Shanghai General Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - Yibo Cai
- Department of Orthopedic, Hainan Hospital of Chinese PLA General Hospital, Sanya, China
| | - Bo Li
- Department of Orthopedics, Changhai Hospital, Naval Medical University, Shanghai, China
- *Correspondence: Bo Li, ; Feng Lin, ; Demeng Xia,
| | - Feng Lin
- Department of Orthopedic, Hainan Hospital of Chinese PLA General Hospital, Sanya, China
- *Correspondence: Bo Li, ; Feng Lin, ; Demeng Xia,
| | - Demeng Xia
- Luodian Clinical Drug Research Center, Shanghai Baoshan Luodian Hospital, Shanghai University, Shanghai, China
- *Correspondence: Bo Li, ; Feng Lin, ; Demeng Xia,
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Ionic Cross-Linkable Alendronate-Conjugated Biodegradable Polyurethane Films for Potential Guided Bone Regeneration. Macromol Res 2022. [DOI: 10.1007/s13233-022-0014-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Dextrin and polyurethane graft copolymers as drug carrier: Synthesis, characterization, drug release, biocompatibility and in-vitro toxicity. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Lin L, Shen L, Zhang J, Xu Y, Fang Z, Müller-Buschbaum P, Zhong Q. Ionic Hydrogels Based Wearable Sensors to Monitor the Solar Radiation Dose for Vitamin D Production and Sunburn Prevention. ACS APPLIED MATERIALS & INTERFACES 2021; 13:45995-46002. [PMID: 34524812 DOI: 10.1021/acsami.1c13027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Wearable solar radiation sensors based on ionic hydrogels are facilely prepared to simultaneously monitor the radiation dose for the production of vitamin D and the prevention of sunburn. Tetramethylethylenediamine (TEMED) is neutralized with acrylic acid (AA) to obtain tetramethylethylenediamine acrylate (TEMEDA), which is further polymerized with acrylamide by a free radical reaction. By simply adding MB or NR during the polymerization, the final obtained ionic hydrogels can indicate solar radiation. Due to the extent of discoloration, the discoloration speed of MB and NR is correlated to the radiation dose. This wearable sensor can indicate the solar radiation dose required by the human body to synthesize vitamin D through the discoloration of the ionized hydrogel of MB, whereas those with NR are able to illustrate the threshold of radiation dose that causes potential skin hurt. Therefore, the benefit and drawback of solar radiation can be well balanced by optimizing the exposure time to solar irradiation. In addition, polyurethane cross-linked with a thermoresponsive coating is used as band for this wearable sensor. Due to the hydrophilicity below its transition temperature, the cross-linked band possesses the easy cleaning capability of stains after the daily wear. Such type of wearable sensor can be broadly used for monitoring the solar radiation, especially in outdoor activities.
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Affiliation(s)
- Li Lin
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Liangen Shen
- Zhejiang Hexin Holdings Co. Ltd., 1568 Dongfang Road, 314003 Jiaxing, China
| | - Junfeng Zhang
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - Yiyan Xu
- Zhejiang Hexin New Material Co. Ltd., 1568 Dongfang Road, 314003 Jiaxing, China
| | - Zheng Fang
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Peter Müller-Buschbaum
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany
| | - Qi Zhong
- Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
- Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany
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8
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Verma S, Sharma N, Kango S, Sharma S. Developments of PEEK (Polyetheretherketone) as a biomedical material: A focused review. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110295] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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9
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Xu J, Fu CY, Tsai YL, Wong CW, Hsu SH. Thermoresponsive and Conductive Chitosan-Polyurethane Biocompatible Thin Films with Potential Coating Application. Polymers (Basel) 2021; 13:326. [PMID: 33498347 PMCID: PMC7864029 DOI: 10.3390/polym13030326] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/18/2020] [Accepted: 01/18/2021] [Indexed: 02/03/2023] Open
Abstract
Conductive thin films have great potential for application in the biomedical field. Herein, we designed thermoresponsive and conductive thin films with hydrophilicity, strain sensing, and biocompatibility. The crosslinked dense thin films were synthesized and prepared through a Schiff base reaction and ionic interaction from dialdehyde polyurethane, N-carboxyethyl chitosan, and double-bonded chitosan grafted polypyrrole. The thin films were air-dried under room temperature. These thin films showed hydrophilicity and conductivity (above 2.50 mS/cm) as well as responsiveness to the deformation. The tensile break strength (9.72 MPa to 15.07 MPa) and tensile elongation (5.76% to 12.77%) of conductive thin films were enhanced by heating them from 25 °C to 50 °C. In addition, neural stem cells cultured on the conductive thin films showed cell clustering, proliferation, and differentiation. The application of the materials as a conductive surface coating was verified by different coating strategies. The conductive thin films are potential candidates for surface modification and biocompatible polymer coating.
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Affiliation(s)
- Junpeng Xu
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan; (J.X.); (C.-Y.F.); (Y.-L.T.); (C.-W.W.)
| | - Chih-Yu Fu
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan; (J.X.); (C.-Y.F.); (Y.-L.T.); (C.-W.W.)
| | - Yu-Liang Tsai
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan; (J.X.); (C.-Y.F.); (Y.-L.T.); (C.-W.W.)
| | - Chui-Wei Wong
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan; (J.X.); (C.-Y.F.); (Y.-L.T.); (C.-W.W.)
| | - Shan-hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, No. 1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan; (J.X.); (C.-Y.F.); (Y.-L.T.); (C.-W.W.)
- Institute of Cellular and System Medicine, National Health Research Institutes, No. 35 Keyan Road, Miaoli 35053, Taiwan
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10
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Mignon A, Pezzoli D, Prouvé E, Lévesque L, Arslan A, Pien N, Schaubroeck D, Van Hoorick J, Mantovani D, Van Vlierberghe S, Dubruel P. Combined effect of Laponite and polymer molecular weight on the cell-interactive properties of synthetic PEO-based hydrogels. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2018.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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11
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Liu X, Zhou L, Heng P, Xiao J, Lv J, Zhang Q, Hickey ME, Tu Q, Wang J. Lecithin doped electrospun poly(lactic acid)-thermoplastic polyurethane fibers for hepatocyte viability improvement. Colloids Surf B Biointerfaces 2019; 175:264-271. [DOI: 10.1016/j.colsurfb.2018.09.069] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 09/19/2018] [Accepted: 09/27/2018] [Indexed: 12/21/2022]
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12
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Efficacy of polyurethane graft on cyclodextrin to control drug release for tumor treatment. J Colloid Interface Sci 2019; 534:215-227. [DOI: 10.1016/j.jcis.2018.09.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 09/10/2018] [Accepted: 09/10/2018] [Indexed: 02/03/2023]
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13
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Xu C, Kuriakose AE, Truong D, Punnakitikashem P, Nguyen KT, Hong Y. Enhancing anti-thrombogenicity of biodegradable polyurethanes through drug molecule incorporation. J Mater Chem B 2018; 6:7288-7297. [PMID: 30906556 PMCID: PMC6424506 DOI: 10.1039/c8tb01582a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Sufficient and sustained anti-thrombogenicity is essential for blood-contacting materials, because blood coagulation and thrombosis caused by platelet adhesion and activation on material surfaces may lead to functional failure and even fatal outcomes. Covalently conjugating antithrombogenic moieties into polymer, instead of surface modifying or blending, can maintain the anti-thrombogenicity of polymer at a high level over a time range. In this study, series of randomly crosslinked, elastic, biodegradable polyurethanes (PU-DPA) were synthesized through a one-pot and one-step method from polycaprolactone (PCL) diol, hexamethylene diisocyanate (HDI) and anti-thrombogenic drug, dipyridamole (DPA). The mechanical properties, hydrophilicity, in vitro degradation, and anti-thrombogenicity of the resultant PU-DPA polymers can be tuned by altering the incorporated DPA amount. The surface and bulk hydrophilicity of the polyurethanes decreased with increasing hydrophobic DPA amount. All PU-DPA polymers exhibited strong mechanical properties and good elasticity. The degradation rates of the PU-DPAs decreased with increasing DPA content in both PBS and lipase/PBS solutions. Covalently incorporating DPA into the polyurethane significantly reduced the platelet adhesion and activation compared to the polyurethane without DPA, and also can achieve sustained anti-thrombogenicity. The PU-DPA films also supported the growth of human umbilical vein endothelial cells. The attractive mechanical properties, blood compatibility, and cell compatibility of this anti-thrombogenic biodegradable polyurethane indicate that it has a great potential to be utilized for blood-contacting devices, and cardiovascular tissue repair and regeneration.
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Affiliation(s)
- Cancan Xu
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Aneetta E. Kuriakose
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Danh Truong
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Primana Punnakitikashem
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Kytai T. Nguyen
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yi Hong
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
- Joint Biomedical Engineering Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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Shukla A, Ray B, Maiti P. Grafted cyclodextrin as carrier for control drug delivery and efficient cell killing. J Biomed Mater Res A 2018; 107:434-444. [DOI: 10.1002/jbm.a.36560] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/28/2018] [Accepted: 10/08/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Aparna Shukla
- School of Materials Science and Technology; Indian Institute of Technology, Banaras Hindu University; Varanasi, 221005 India
| | - Biswajit Ray
- Department of Chemistry; Institute of Science, Banaras Hindu University; Varanasi, 221005 India
| | - Pralay Maiti
- School of Materials Science and Technology; Indian Institute of Technology, Banaras Hindu University; Varanasi, 221005 India
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15
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Aydin HM, Türk M, Calimli A, Pişkin E. Attachment and Growth of Fibroblasts on Poly(L-lactide/∊-caprolactone) Scaffolds Prepared in Supercritical CO2 and Modified by Polyethylene Imine Grafting with Ethylene Diamine-Plasma in a Glow-Discharge Apparatus. Int J Artif Organs 2018; 29:873-80. [PMID: 17033995 DOI: 10.1177/039139880602900909] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this study, a copolymer of L-lactide and ∊-caprolactone (Mn: 73,523, Mw: 127,990 and PI: 1.74) was synthesized by ring-opening polymerization by using stannous octoate as the catalyst. FTIR, 1H-NMR and DSC confirmed the copolymer formation. The copolymer films were prepared and a novel method was developed to produce highly porous sponges for potential use in tissue engineering. Films were subjected to supercritical CO2 at 3300 psi and 70°C to create porous structures for production of possible tissue engineering scaffolds. The pore sizes were in the range of 40–80 mm. The copolymer films were pre-wetted with polyethylene imine (PEI) and then treated with ethylene diamine (EDA)-plasma in glow-discharge apparatus. Gas plasma surface modification of three-dimensional scaffolds fabricated by supercritical carbon dioxide technique was demonstrated to enhance cell adhesion, proliferation, and differentiation over 6 days in culture using L929 fibroblast cell line. Alkaline phosphatase (ALP) activity and glucose uptake in cell culture medium were followed in the cell culture experiments. Fibroblastic cell attachment and growth on the EDA-plasma treated scaffolds were rather low. However, both cell attachment and growth were significantly increased by PEI pre-treatment before EDA-plasma. The changes in ALP activity and glucose uptake also supported the cell growth behavior on these PEI and EDA-plasma treated scaffolds.
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Affiliation(s)
- H M Aydin
- Chemical Engineering Department, Bioengineering Division and Center of Bioengineering, Hacettepe University, Turkey
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16
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Lui YF, Ip WY. Biological Evaluation of Flexible Polyurethane/Poly l-Lactic Acid Composite Scaffold as a Potential Filler for Bone Regeneration. MATERIALS 2017; 10:ma10091042. [PMID: 28902161 PMCID: PMC5615697 DOI: 10.3390/ma10091042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 08/19/2017] [Accepted: 08/31/2017] [Indexed: 12/28/2022]
Abstract
Degradable bone graft substitute for large-volume bone defects is a continuously developing field in orthopedics. With the advance in biomaterial in past decades, a wide range of new materials has been investigated for their potential in this application. When compared to common biopolymers within the field such as PLA or PCL, elastomers such as polyurethane offer some unique advantages in terms of flexibility. In cases of bone defect treatments, a flexible soft filler can help to establish an intimate contact with surrounding bones to provide a stable bone-material interface for cell proliferation and ingrowth of tissue. In this study, a porous filler based on segmented polyurethane incorporated with poly l-lactic acid was synthesized by a phase inverse salt leaching method. The filler was put through in vitro and in vivo tests to evaluate its potential in acting as a bone graft substitute for critical-sized bone defects. In vitro results indicated there was a major improvement in biological response, including cell attachment, proliferation and alkaline phosphatase expression for osteoblast-like cells when seeded on the composite material compared to unmodified polyurethane. In vivo evaluation on a critical-sized defect model of New Zealand White (NZW) rabbit indicated there was bone ingrowth along the defect area with the introduction of the new filler. A tight interface formed between bone and filler, with osteogenic cells proliferating on the surface. The result suggested polyurethane/poly l-lactic acid composite is a material with the potential to act as a bone graft substitute for orthopedics application.
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Affiliation(s)
- Yuk Fai Lui
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong, China.
| | - Wing Yuk Ip
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong, China.
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Munj HR, Tomasko DL. Polycaprolactone-polymethyl methacrylate electrospun blends for biomedical applications. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17050121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Luo C, Liu W, Luo B, Tian J, Wen W, Liu M, Zhou C. Antibacterial activity and cytocompatibility of chitooligosaccharide-modified polyurethane membrane via polydopamine adhesive layer. Carbohydr Polym 2017; 156:235-243. [DOI: 10.1016/j.carbpol.2016.09.036] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 09/04/2016] [Accepted: 09/13/2016] [Indexed: 01/18/2023]
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Trimukhe AM, Pandiyaraj KN, Tripathi A, Melo JS, Deshmukh RR. Plasma Surface Modification of Biomaterials for Biomedical Applications. ADVANCED STRUCTURED MATERIALS 2017. [DOI: 10.1007/978-981-10-3328-5_3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Hsu SH, Tseng HJ. In vitro Biocompatibility of PTMO-based Polyurethanes and those Containing PDMS Blocks. J Biomater Appl 2016; 19:135-46. [PMID: 15381786 DOI: 10.1177/0885328204044160] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this work, a series of different polyurethanes based on poly(tetramethylene oxide) (PTMO, MW 2000) and chain extended with butenediol were synthesized by a two-step solution polymerization. Three of them contained silanol terminated polydimethylsiloxane (PDMS, MW 2000) blocks. It was shown that these polymers exhibited various degrees of micro-phase separation that further influenced their biological performances in vitro. The formulation with diphenylmethane diisocyanate/PTMO/PDMS/2-butene-1,4-diol at a molar ratio of 2: 0.75: 0.5: 1 in synthesis was favorable due to a combination of enhanced mechanical properties, biostability, cellular affinity as well as platelet nonadherence.
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Affiliation(s)
- Shan-Hui Hsu
- Department of Chemical Engineering, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan 402, ROC.
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21
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Khelifa F, Ershov S, Habibi Y, Snyders R, Dubois P. Free-Radical-Induced Grafting from Plasma Polymer Surfaces. Chem Rev 2016; 116:3975-4005. [PMID: 26943005 DOI: 10.1021/acs.chemrev.5b00634] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the advances in science and engineering in the second part of the 20th century, emerging plasma-based technologies continuously find increasing applications in the domain of polymer chemistry, among others. Plasma technologies are predominantly used in two different ways: for the treatment of polymer substrates by a reactive or inert gas aiming at a specific surface functionalization or for the synthesis of a plasma polymer with a unique set of properties from an organic or mixed organic-inorganic precursor. Plasma polymer films (PPFs), often deposited by plasma-enhanced chemical vapor deposition (PECVD), currently attract a great deal of attention. Such films are widely used in various fields for the coating of solid substrates, including membranes, semiconductors, metals, textiles, and polymers, because of a combination of interesting properties such as excellent adhesion, highly cross-linked structures, and the possibility of tuning properties by simply varying the precursor and/or the synthesis parameters. Among the many appealing features of plasma-synthesized and -treated polymers, a highly reactive surface, rich in free radicals arising from deposition/treatment specifics, offers a particular advantage. When handled carefully, these reactive free radicals open doors to the controllable surface functionalization of materials without affecting their bulk properties. The goal of this review is to illustrate the increasing application of plasma-based technologies for tuning the surface properties of polymers, principally through free-radical chemistry.
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Affiliation(s)
- Farid Khelifa
- University of Mons (UMONS) , Institute of Research in Science and Engineering of Materials, Place du Parc, 23, 7000 Mons, Belgium
| | - Sergey Ershov
- University of Mons (UMONS) , Institute of Research in Science and Engineering of Materials, Place du Parc, 23, 7000 Mons, Belgium.,Materials Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST) , Rue du Brill 41, 4422 Belvaux, Luxembourg
| | - Youssef Habibi
- Materials Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST) , Rue du Brill 41, 4422 Belvaux, Luxembourg
| | - Rony Snyders
- University of Mons (UMONS) , Institute of Research in Science and Engineering of Materials, Place du Parc, 23, 7000 Mons, Belgium
| | - Philippe Dubois
- University of Mons (UMONS) , Institute of Research in Science and Engineering of Materials, Place du Parc, 23, 7000 Mons, Belgium.,Materials Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST) , Rue du Brill 41, 4422 Belvaux, Luxembourg
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Jiang N, Abe H. Crystallization and melting behavior of partially miscible six-armed poly(l-lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) blends. J Appl Polym Sci 2015. [DOI: 10.1002/app.42548] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ni Jiang
- Bioplastic Research Team; Biomass Engineering Program Cooperation Division; RIKEN Center for Sustainable Resource Science; 2-1, Hirosawa Wako-Shi Saitama 351-0198 Japan
| | - Hideki Abe
- Bioplastic Research Team; Biomass Engineering Program Cooperation Division; RIKEN Center for Sustainable Resource Science; 2-1, Hirosawa Wako-Shi Saitama 351-0198 Japan
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Couturaud B, Baldo A, Mas A, Robin JJ. Improvement of the interfacial compatibility between cellulose and poly(l-lactide) films by plasma-induced grafting of l-lactide: The evaluation of the adhesive properties using a peel test. J Colloid Interface Sci 2015; 448:427-36. [DOI: 10.1016/j.jcis.2015.02.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 02/12/2015] [Accepted: 02/12/2015] [Indexed: 11/24/2022]
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Jiang N, Abe H. Effect of atactic poly(3-hydroxybutyrate) block on the crystallization and degradation behavior of 6-arm poly(l-lactide)-b-atactic poly(3-hydroxybutyrate). Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.01.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sariibrahimoglu K, Yang W, Leeuwenburgh SCG, Yang F, Wolke JGC, Zuo Y, Li Y, Jansen JA. Development of porous polyurethane/strontium-substituted hydroxyapatite composites for bone regeneration. J Biomed Mater Res A 2014; 103:1930-9. [DOI: 10.1002/jbm.a.35327] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/12/2014] [Accepted: 08/14/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Kemal Sariibrahimoglu
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Wanxun Yang
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Sander C. G. Leeuwenburgh
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Fang Yang
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Joop G. C. Wolke
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
| | - Yi Zuo
- Research Center for Nano-Biomaterials, Analytical and Testing Center; Sichuan University; Chengdu 610064 China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center; Sichuan University; Chengdu 610064 China
| | - John A. Jansen
- Department of Biomaterials; Radboud University Medical Center; PO Box 9101 6500 HB Nijmegen The Netherlands
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Cho Y, Vu BQ, Bedair TM, Park BJ, Joung YK, Han DK. Crack prevention of biodegradable polymer coating on metal facilitated by a nano-coupled interlayer. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514547094] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Crack prevention of biodegradable polymer coatings on drug-eluting stents was investigated by introducing a nano-coupled layer at the interface between the metal surface and the polymer coating layer using surface-initiated ring-opening polymerization of ε-caprolactone. Poly(d,l-lactide-co-glycolide) coating on cobalt-chromium control and ricinoleic acid-poly(caprolactone)–grafted cobalt-chromium was carried out using electrospraying. The cracking of the biodegradable polymer coating on drug-eluting stents during ballooning was addressed by introducing a nano-coupled interlayer on the cobalt-chromium surface. The ricinoleic acid-poly(caprolactone) nano-coupled interlayer and poly(d,l-lactide-co-glycolide)-coated top layer were characterized using attenuated total reflection Fourier transform infrared, contact angle, ellipsometry, X-ray photoelectron spectroscopy, and atomic force microscopy. Based on scratch tests, the nano-coupled samples had stronger interfacial adhesion compared to the control sample without the nano-coupled layer. Scanning electron microscope images indicated that the cracking on the poly(d,l-lactide-co-glycolide) coating was addressed. Introducing a nano-coupling interlayer may be an important strategy to preventing polymer coating cracking on drug-eluting stents.
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Affiliation(s)
- Youngjin Cho
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Bach Quang Vu
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Tarek M Bedair
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Bang Ju Park
- Department of Electronic Engineering and Institute of Gachon Fusion Technology, Gachon University, Seongnam, Republic of Korea
| | - Yoon Ki Joung
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Dong Keun Han
- Center for Biomaterials, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- Department of Biomedical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
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Bao Y, Dai G. Time-Gradient Nitric Acid Modification of CF Biofilm-Carrier and Surface Nature Effects on Microorganism Immobilization Behavior in Wastewater. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/bbeq.2013.0054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Jing X, Mi HY, Salick MR, Cordie T, Crone WC, Peng XF, Turng LS. Morphology, mechanical properties, and shape memory effects of poly(lactic acid)/ thermoplastic polyurethane blend scaffolds prepared by thermally induced phase separation. J CELL PLAST 2014. [DOI: 10.1177/0021955x14525959] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Novel blended scaffolds combining biobased polylactic acid (PLA) and thermoplastic polyurethane (TPU) were fabricated by thermally induced phase separation (TIPS) using two different solvents. Pure PLA and TPU polymer scaffolds using 1,4-dioxane as the sole solvent exhibited typical ladder-like structures, while blended PLA/TPU scaffolds using the same solvent showed a more uniform microstructure. When de-ionized water was added to the solution as a non-solvent, scaffolds with the mixed solvent showed more open cells and greater interconnectivity. In compression tests, it was found that specimens, including pure PLA, TPU, and blended scaffolds with the mixed solvent, showed a higher compressive modulus than their counterparts that used dioxane as the single solvent. Dynamic mechanical analysis (DMA) was employed to characterize the shape memory properties of the scaffolds. DMA indicated that the shape fixing ratio was highest in the PLA scaffolds, while the shape recovery ratio of the TPU scaffolds was the greatest among the specimens. More interestingly, when the mixed solvent was used, the shape memory property of the blended scaffolds displayed a similar deformation curve to the TPU scaffold. This was due to the presence of the TPU phase and similarity in structure between PLA/TPU and TPU scaffolds when mixed solvent was used. In the degradation test, the blended scaffolds showed a balanced degradation behavior in-between the more easily degraded PLA and the more stable TPU in the phosphate-buffered saline (PBS), and the addition of water to the systems accelerated the degradation process of the specimens. Cell culture results showed that all of the scaffolds had good biocompatibility.
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Affiliation(s)
- Xin Jing
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA
| | - Hao-Yang Mi
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA
| | - Max R Salick
- Department of Engineering Physics, University of Wisconsin-Madison, WI, USA
| | - Travis Cordie
- Department of Biomedical Engineering, University of Wisconsin-Madison, WI, USA
| | - Wendy C Crone
- Department of Engineering Physics, University of Wisconsin-Madison, WI, USA
| | - Xiang-Fang Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, China
| | - Lih-Sheng Turng
- Wisconsin Institute for Discovery, University of Wisconsin-Madison, WI, USA
- Department of Mechanical Engineering, University of Wisconsin-Madison, WI, USA
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Stem cell responses to plasma surface modified electrospun polyurethane scaffolds. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2014; 10:949-58. [PMID: 24524929 DOI: 10.1016/j.nano.2014.01.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 01/08/2014] [Accepted: 01/28/2014] [Indexed: 12/13/2022]
Abstract
UNLABELLED The topographical effects from functional materials on stem cell behavior are currently of interest in tissue engineering and regenerative medicine. Here we investigate the influence of argon, oxygen, and hydrogen plasma surface modification of electrospun polyurethane fibers on human embryonic stem cell (hESC) and rat postnatal neural stem cell (NSC) responses. The plasma gases were found to induce three combinations of fiber surface functionalities and roughness textures. On randomly oriented fibers, plasma treatments lead to substantially increased hESC attachment and proliferation as compared to native fibers. Argon plasma was found to induce the most optimal combination of surface functionality and roughness for cell expansion. Contact guided migration of cells and alignment of cell processes were observed on aligned fibers. Neuronal differentiation around 5% was found for all samples and was not significantly affected by the induced variations of surface functional group distribution or individual fiber topography. FROM THE CLINICAL EDITOR In this study the influence of argon, oxygen, and hydrogen plasma surface modification of electrospun polyurethane fibers on human embryonic stem cell and rat postnatal neural stem cell (NSC) responses is studied with the goal of clarifying the potential effects of functional materials on stem cell behavior, a topic of substantial interest in tissue engineering and regenerative medicine.
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30
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Conn G, Kidane AG, Punshon G, Kannan RY, Hamilton G, Seifalian AM. Is there an alternative to systemic anticoagulation, as related to interventional biomedical devices? Expert Rev Med Devices 2014; 3:245-61. [PMID: 16515390 DOI: 10.1586/17434440.3.2.245] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To reduce the toxic effects, related clinical problems and complications such as bleeding disorders associated with systemic anticoagulation, it has been hypothesized that by coating the surfaces of medical devices, such as stents, bypass grafts, extracorporeal circuits, guide wires and catheters, there will be a significant reduction in the requirement for systemic anticoagulation or, ideally, it will no longer be necessary. However, current coating processes, even covalent ones, still result in leaching followed by reduced functionality. Alternative anticoagulants and related antiplatelet agents have been used for improvement in terms of reduced restenosis, intimal hyperphasia and device failure. This review focuses on existing heparinization processes, their application in clinical devices and the updated list of alternatives to heparinization in order to obtain a broad overview, it then highlights, in particular, the future possibilities of using heparin and related moieties to tissue engineer scaffolds.
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Affiliation(s)
- Gemma Conn
- Biomaterials & Tissue Engineering Centre, Academic Division of Surgical and Interventional Sciences, University College London, Rowland Hill Street, Hampstead, London NW3 2PF, UK
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Perales-Alcacio J, Santa-Olalla Tapia J, Mojica-Cardoso C, Vargas-Coronado R, Chan-Chan L, Headen D, García A, Cervantes-Uc J, Cauich-Rodríguez J. HUVEC biocompatibility and platelet activation of segmented polyurethanes prepared with either glutathione or its amino acids as chain extenders. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1601-17. [DOI: 10.1080/09205063.2013.782804] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- J.L.A. Perales-Alcacio
- a Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales , Calle 43 No. 130, Col. Chuburná de Hidalgo. C.P. 97200, Mérida , Yucatán , Mexico
| | - J. Santa-Olalla Tapia
- b Unidad de Diagnóstico y Medicina Molecular , Hospital del Niño Morelense , Cuernavaca , Morelos , Mexico
- c Facultad de Medicina , Universidad Autónoma del Estado de Morelos , Cuernavaca , Morelos , Mexico
| | - C. Mojica-Cardoso
- b Unidad de Diagnóstico y Medicina Molecular , Hospital del Niño Morelense , Cuernavaca , Morelos , Mexico
| | - R.F. Vargas-Coronado
- a Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales , Calle 43 No. 130, Col. Chuburná de Hidalgo. C.P. 97200, Mérida , Yucatán , Mexico
| | - L.H. Chan-Chan
- a Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales , Calle 43 No. 130, Col. Chuburná de Hidalgo. C.P. 97200, Mérida , Yucatán , Mexico
| | - D.M. Headen
- d Woodruff School of Mechanical Engineering , Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology , Atlanta , USA
| | - A.J. García
- d Woodruff School of Mechanical Engineering , Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology , Atlanta , USA
| | - J.M. Cervantes-Uc
- a Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales , Calle 43 No. 130, Col. Chuburná de Hidalgo. C.P. 97200, Mérida , Yucatán , Mexico
| | - J.V. Cauich-Rodríguez
- a Centro de Investigación Científica de Yucatán, A.C., Unidad de Materiales , Calle 43 No. 130, Col. Chuburná de Hidalgo. C.P. 97200, Mérida , Yucatán , Mexico
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Liang M, Yao J, Chen X, Huang L, Shao Z. Silk fibroin immobilization on poly(ethylene terephthalate) films: Comparison of two surface modification methods and their effect on mesenchymal stem cells culture. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1409-16. [DOI: 10.1016/j.msec.2012.12.044] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 11/08/2012] [Accepted: 12/10/2012] [Indexed: 11/29/2022]
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Kang TY, Hong JM, Kim BJ, Cha HJ, Cho DW. Enhanced endothelialization for developing artificial vascular networks with a natural vessel mimicking the luminal surface in scaffolds. Acta Biomater 2013; 9:4716-25. [PMID: 22947325 DOI: 10.1016/j.actbio.2012.08.042] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 08/22/2012] [Accepted: 08/26/2012] [Indexed: 12/19/2022]
Abstract
Large tissue regeneration remains problematic because of a lack of oxygen and nutrient supply. An attempt to meet the metabolic needs of cells has been made by preforming branched vascular networks within a scaffold to act as channels for mass transport. When constructing functional vascular networks with channel patency, emphasis should be placed on anti-thrombogenic surface issues. The aim of this study was to develop a rapid endothelialization method for creating an anti-thrombogenic surface mimicking the natural vessel wall in the artificial vascular networks. Shear stress preconditioning and scaffold surface modification were investigated as effective approaches for promoting biomaterial endothelialization. We found that a transient increase in shear stress at the appropriate time is key to enhancing endothelialization. Moreover, surface modification with bioactive materials such as collagen and recombinant mussel adhesive protein fused with arginine-glycine-aspartic acid peptide (MAP-RGD) showed a synergetic effect with shear stress preconditioning. Platelet adhesion tests demonstrated the anti-thrombogenic potential of MAP-RGD itself without endothelialization. The rapid endothelialization method established in this study can be easily applied to preformed artificial vascular networks in porous scaffolds. Development of artificial vascular networks with an anti-thrombogenic luminal surface will open up a new chapter in tissue engineering and regenerative medicine.
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Gao M, Ren Z, Yan S, Sun J, Chen X. An optical microscopy study on the phase structure of poly(L-lactide acid)/poly(propylene carbonate) blends. J Phys Chem B 2012; 116:9832-7. [PMID: 22827324 DOI: 10.1021/jp3041378] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dependence of phase structure of PLLA/PPC blends on the blend ratio, the heat-treatment temperature and time was investigated by optical microscopy. It is found that, at lower PPC content, e.g., less than 30%, the PLLA crystalline spherulites fill the whole space with the PPC dispersed in the amorphous region of PLLA. No evident phase separation has been observed under optical microscope. When the content of PPC reaches 40%, phase separation takes place. The phase separation of the PLLA/PPC blend happens prior to the crystallization of PLLA. Therefore, the heat-treatment temperature and time are the two most important factors that control the phase structure of the blend. At low heat-treatment temperatures, e.g., lower than 190 °C, the PPC and the amorphous PLLA part compose a continuous phase with the crystalline PLLA domains dispersed in it. When the sample was heat-treated at 200 °C for 5 min, a bicontinuous phase structure was observed. With further increase of the heat-treatment temperature, the crystalline PLLA composes the continuous phase with PPC domains randomly dispersed in it. Similar phase reversal phenomenon has also been observed by heat-treating the samples at 200 °C for different times. It is further confirmed that the crystallization of PLLA in the blends is influenced by the different phase structures. For example, the crystallinity of PLLA in the blend increases with increasing heat-treatment temperature.
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Affiliation(s)
- Min Gao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Jiang X, Yu F, Wang Z, Li J, Tan H, Ding M, Fu Q. Fabrication and Characterization of Waterborne Biodegradable Polyurethanes 3-Dimensional Porous Scaffolds for Vascular Tissue Engineering. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 21:1637-52. [DOI: 10.1163/092050609x12525750021270] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Xia Jiang
- a College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Feilong Yu
- b College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Zhigao Wang
- c College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Jiehua Li
- d College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Hong Tan
- e College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Mingming Ding
- f College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Qiang Fu
- g College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, P. R. China
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36
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Surface characterisation of oxygen plasma treated electrospun polyurethane fibres and their interaction with red blood cells. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.01.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Ravichandran R, Sundarrajan S, Venugopal JR, Mukherjee S, Ramakrishna S. Advances in polymeric systems for tissue engineering and biomedical applications. Macromol Biosci 2012; 12:286-311. [PMID: 22278779 DOI: 10.1002/mabi.201100325] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 11/16/2011] [Indexed: 12/23/2022]
Abstract
The characteristics of tissue engineered scaffolds are major concerns in the quest to fabricate ideal scaffolds for tissue engineering applications. The polymer scaffolds employed for tissue engineering applications should possess multifunctional properties such as biocompatibility, biodegradability and favorable mechanical properties as it comes in direct contact with the body fluids in vivo. Additionally, the polymer system should also possess biomimetic architecture and should support stem cell adhesion, proliferation and differentiation. As the progress in polymer technology continues, polymeric biomaterials have taken characteristics more closely related to that desired for tissue engineering and clinical needs. Stimuli responsive polymers also termed as smart biomaterials respond to stimuli such as pH, temperature, enzyme, antigen, glucose and electrical stimuli that are inherently present in living systems. This review highlights the exciting advancements in these polymeric systems that relate to biological and tissue engineering applications. Additionally, several aspects of technology namely scaffold fabrication methods and surface modifications to confer biological functionality to the polymers have also been discussed. The ultimate objective is to emphasize on these underutilized adaptive behaviors of the polymers so that novel applications and new generations of smart polymeric materials can be realized for biomedical and tissue engineering applications.
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Affiliation(s)
- Rajeswari Ravichandran
- Healthcare and Energy Materials Laboratory, Nanoscience and Nanotechnology Initiative, National University of Singapore, Singapore
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de Olyveira GM, Manzine Costa LM, Basmaji P, Xavier Filho L. Bacterial Nanocellulose for Medicine Regenerative. J Nanotechnol Eng Med 2012. [DOI: 10.1115/1.4004181] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Bacterial cellulose (BC) has established to be a remarkably versatile biomaterial and can be used in a wide variety of applied scientific endeavours, especially for medical devices. Nanocellulose, such as that produced by the bacteria Gluconacetobacter xylinus (bacterial cellulose, BC), is an emerging biomaterial with great potential in flexible radar absorbing materials, in scaffold for tissue regeneration, water treatment, and medical applications. Bacterial cellulose nanofibril bundles have excellent intrinsic properties due to their high crystallinity, which is higher than that generally recorded for macroscale natural fibers and is of the same order as the elastic modulus of glass fibers. Compared with cellulose from plants, BC also possesses higher water holding capacity, higher degree of polymerization (up to 8000), and a finer weblike network. In addition, BC is produced as a highly hydrated and relatively pure cellulose membrane, and therefore no chemical treatments are needed to remove lignin and hemicelluloses, as is the case for plant cellulose. Because of these characteristics, biomedical devices recently have gained a significant amount of attention because of an increased interest in tissue-engineered products for both wound care and the regeneration of damaged or diseased organs. Hydrophilic bacterial cellulose fibers of an average diameter of 50 nm are produced by the bacterium Acetobacter xylinum, using a fermentation process. The architecture of BC materials can be engineered over length scales ranging from nano to macro by controlling the biofabrication process. Moreover, the nanostructure and morphological similarities with collagen make BC attractive for cell immobilization and cell support. This review describes the fundamentals, purification, and morphological investigation of bacterial cellulose. Besides, microbial cellulose modification and how to increase the compatibility between cellulosic surfaces and a variety of plastic materials have been reported. Furthermore, provides deep knowledge of current and future applications of bacterial cellulose and their nanocomposites especially in the medical field.
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Affiliation(s)
- Gabriel Molina de Olyveira
- Centro de Ciências Naturais e Humanas CCNH-UFABC, Rua Santa Adélia, 166, Santo André-SP, Brazil, 09291-210
| | - Ligia Maria Manzine Costa
- Centro de Ciências Naturais e Humanas CCNH-UFABC, Rua Santa Adélia, 166, Santo André-SP, Brazil, 09291-210
| | - Pierre Basmaji
- Innovatec’s–Biotechnology Research and Development, Sao Carlos, SP, Brazil, 13566-610
| | - Lauro Xavier Filho
- Laboratorio de Produtos Naturais e Biotecnologia, IPT, UNIT, Aracaju-Sergipe, Brazil, 49.032-490
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Guo B, Sun Y, Finne-Wistrand A, Mustafa K, Albertsson AC. Electroactive porous tubular scaffolds with degradability and non-cytotoxicity for neural tissue regeneration. Acta Biomater 2012; 8:144-53. [PMID: 21985870 DOI: 10.1016/j.actbio.2011.09.027] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 09/22/2011] [Accepted: 09/22/2011] [Indexed: 01/08/2023]
Abstract
Electroactive degradable porous tubular scaffolds were fabricated from the blends of polycaprolactone and a hyperbranched degradable conducting copolymer at different feed ratios by a solution-casting/salt-leaching method. Scaning electron microscopy (SEM) and microcomputed tomography tests indicated that these scaffolds had homogeneously distributed interconnected pores on the cross-section and surface. The electrical conductivity of films with the same composition as the scaffolds was between 3.4×10(-6) and 3.1×10(-7) S cm(-1), depending on the ratio of hyperbranched degradable conducting copolymer to polycaprolactone. A hydrophilic surface with a contact angle of water about 30° was achieved by doping the films with (±)-10-camphorsulfonic acid. The mechanical properties of the films were investigated by tensile tests, and the morphology of the films was studied by SEM. The scaffolds were subjected to the WST test (a cell proliferation and cytotoxicity assay using water-soluble tetrazolium salts) with HaCaT keratinocyte cells, and the results show that these scaffolds are non-cytotoxic. These degradable electroactive tubular scaffolds are good candidates for neural tissue engineering application.
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Choi J, Cho SB, Lee BS, Joung YK, Park K, Han DK. Improvement of interfacial adhesion of biodegradable polymers coated on metal surface by nanocoupling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14232-14239. [PMID: 22017569 DOI: 10.1021/la2030318] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A method of securing the adhesion of biodegradable polymer coating was investigated for drug-eluting metal stents, using surface-initiated ring-opening polymerization (SI-ROP) of L-lactide. Introduction of oligolactide on the stainless steel (SS) surface was successful and the thickness of the oligolactide grafts remained on the nanometer scale, as determined by ellipsometry. The presence of an oligolactide graft was also identified using attenuated total reflection-Fourier transform infrared (ATR-FTIR) and electron spectroscopy for chemical analysis (ESCA). On top of the grafts, poly(D,L-lactide-co-glycolide) (PLGA) coating was carried out on different substrates such as SS control, plasma-treated SS, and lactide-grafted (referred to as a nanocoupled) SS using electrospraying. When the adhesion forces were measured with a scratch tester, the nanocoupled SS showed the strongest interfacial adhesion between polymer coating layer and metal substrate. The outcome of the peel-off test was also consistent with the result of the scratch test. When degradation behavior of the polymer coating in vitro was examined for up to 4 weeks in a continuous fluid flow, the SEM images demonstrated that polymer degradation was obvious due to hydration and swelling of the polymer matrix. Although the matrix completely disappeared after 4 weeks for SS control and plasma-treated substrates, the nanocoupled SS was persistent with some polymer matrix. In addition, the release profiles of SRL-loaded PLGA coating appeared slightly different between control and nanocoupled groups. This work suggested that the concept of nanocoupling remarkably improved the interfacial adhesion stability between metal surface and polymer layer and controlled drug release, and showed the feasibility of drug-eluting stents.
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Affiliation(s)
- Jiyeon Choi
- Center for Biomaterials, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea
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Solouk A, Cousins BG, Mirzadeh H, Seifalian AM. Application of plasma surface modification techniques to improve hemocompatibility of vascular grafts: A review. Biotechnol Appl Biochem 2011; 58:311-27. [PMID: 21995534 DOI: 10.1002/bab.50] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 08/12/2011] [Indexed: 12/14/2022]
Affiliation(s)
- Atefeh Solouk
- Polymer Engineering Faculty, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
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Park BJ, Kwon BJ, Kang JK, Lee MH, Han I, Kim JK, Park JC. Enhanced cellular responses of vascular endothelial cells on poly-γ-glutamic acid/PU composite film treated with microwave-induced plasma at atmospheric pressure. Macromol Res 2011. [DOI: 10.1007/s13233-011-0605-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jiang X, Wang K, Ding M, Li J, Tan H, Wang Z, Fu Q. Quantitative grafting of peptide onto the nontoxic biodegradable waterborne polyurethanes to fabricate peptide modified scaffold for soft tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:819-827. [PMID: 21360121 DOI: 10.1007/s10856-011-4265-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Accepted: 02/18/2011] [Indexed: 05/30/2023]
Abstract
Gly-Arg-Gly-Asp-Ser-Pro (GRGDSP) peptide has frequently been used in the biomedical materials to enhance adhesion and proliferation of cells. In this work, we modified the nontoxic biodegradable waterborne polyurethanes (WBPU) with GRGDSP peptide and fabricated 3-D porous scaffold with the modified WBPU to investigate the effect of the immobilized GRGDSP peptide on human umbilical vein endothelial cells (HUVECs) adhesion and proliferation. A facile and reliable approach was first developed to quantitative grafting of GRGDSP onto the WBPU molecular backbone using ethylene glycol diglycidyl ether (EX810) as a connector. Then 3-D porous WBPU scaffolds with various GRGDSP content were fabricated by freeze-drying the emulsion. In both of the HUVECs adhesion and proliferation tests, enhanced cell performance was observed on the GRGDSP grafted scaffolds compared with the unmodified scaffolds and the tissue culture plate (TCP). The adhesion rate and proliferation rate increased with the increase of GRGDSP content in the scaffold and reached a maximum with peptide concentration of 0.85 μmol/g based on the weight of the polyurethanes. These results illustrate the necessity of the effective control of the GRGDSP content in the modified WBPU and support the potential utility of these 3-D porous modified WBPU scaffolds in the soft tissue engineering to guide cell adhesion, proliferation and tissue regeneration.
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Affiliation(s)
- Xia Jiang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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Armentano I, Dottori M, Fortunati E, Mattioli S, Kenny J. Biodegradable polymer matrix nanocomposites for tissue engineering: A review. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.06.007] [Citation(s) in RCA: 482] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Shourgashti Z, Khorasani M, Khosroshahi S. Plasma-induced grafting of polydimethylsiloxane onto polyurethane surface: Characterization and in vitro assay. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2010.04.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Woo YI, Lee MH, Kim HL, Park JC, Han DW, Kim JK, Tsubaki K, Chung KH, Hyun SO, Yang YI. Cellular responses and behaviors of adipose-derived stem cells onto β-glucan and PLGA composites surface-modified by microwave-induced argon plasma. Macromol Res 2010. [DOI: 10.1007/s13233-009-0125-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Armentano I, Ciapetti G, Pennacchi M, Dottori M, Devescovi V, Granchi D, Baldini N, Olalde B, Jurado MJ, Alava JIM, Kenny JM. Role of PLLA plasma surface modification in the interaction with human marrow stromal cells. J Appl Polym Sci 2009. [DOI: 10.1002/app.31008] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wu Z, Chen H, Huang H, Zhao T, Liu X, Li D, Yu Q. A Facile Approach to Modify Polyurethane Surfaces for Biomaterial Applications. Macromol Biosci 2009; 9:1165-8. [DOI: 10.1002/mabi.200900221] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hemocompatibility and cytocompatibility of styrenesulfonate-grafted PDMS–polyurethane–HEMA hydrogel. Colloids Surf B Biointerfaces 2009; 70:132-41. [DOI: 10.1016/j.colsurfb.2008.12.020] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 12/12/2008] [Accepted: 12/14/2008] [Indexed: 11/17/2022]
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Li J, Ding M, Fu Q, Tan H, Xie X, Zhong Y. A novel strategy to graft RGD peptide on biomaterials surfaces for endothelization of small-diamater vascular grafts and tissue engineering blood vessel. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2595-2603. [PMID: 18197370 DOI: 10.1007/s10856-007-3354-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2007] [Accepted: 12/28/2007] [Indexed: 05/25/2023]
Abstract
To improve the performance of small-diamater vascular grafts, endothelization of biomaterials surfaces and tissue engineering are more promising strategies to fabricate small-diamater vascular grafts. In this study, a Gly-Arg-Gly-Asp-Ser-Pro (GRGDSP) peptide was grafted on the surfaces of poly(carbonate urethane)s (PCUs), with photoactive 4-benzoylbenzoic acid (BBA) by UV irradiation. The photoactive peptides (BBM-GRGDSP) were synthesized with classical active ester of peptide synthesis. The modified surfaces of PCU with the photoactive RGD peptides were characterized by water contact angle measurement and X-ray Photoelectron Spectroscopy (XPS), which results suggested that the peptides were successfully grafted on the PCU surfaces. The effect of these modified surfaces on endothelial cells (ECs) adhesion and proliferation was examined over 72 h. PCU surfaces coupled with the synthetic photoactive RGD peptides, as characterized with phase contrast microscope and the metabolic activity (MTT) assay enhanced ECs proliferation and spreading with increasing concentration of RGD peptides grafted on their surfaces. Increased retention of ECs was also observed on the polymers surfaces under flow shear stress conditions. The results demonstrated that GRGDSP peptides grafted on the surfaces of polymers with photoactive 4-benzoylbenzoic acids could be an efficient method of fabrication for artificial small-diamater blood vessels. The modified polymer is expected to be used for small-diamater vascular grafts and functional tissue engineered blood vessels to improve ECs adhesion and retention on the polymer surfaces under flow shear stress conditions.
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