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Özcolak B, Erenay B, Odabaş S, Jandt KD, Garipcan B. Effects of bone surface topography and chemistry on macrophage polarization. Sci Rep 2024; 14:12721. [PMID: 38830871 PMCID: PMC11148019 DOI: 10.1038/s41598-024-62484-3] [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: 02/01/2024] [Accepted: 05/17/2024] [Indexed: 06/05/2024] Open
Abstract
Surface structure plays a crucial role in determining cell behavior on biomaterials, influencing cell adhesion, proliferation, differentiation, as well as immune cells and macrophage polarization. While grooves and ridges stimulate M2 polarization and pits and bumps promote M1 polarization, these structures do not accurately mimic the real bone surface. Consequently, the impact of mimicking bone surface topography on macrophage polarization remains unknown. Understanding the synergistic sequential roles of M1 and M2 macrophages in osteoimmunomodulation is crucial for effective bone tissue engineering. Thus, exploring the impact of bone surface microstructure mimicking biomaterials on macrophage polarization is critical. In this study, we aimed to sequentially activate M1 and M2 macrophages using Poly-L-Lactic acid (PLA) membranes with bone surface topographical features mimicked through the soft lithography technique. To mimic the bone surface topography, a bovine femur was used as a model surface, and the membranes were further modified with collagen type-I and hydroxyapatite to mimic the bone surface microenvironment. To determine the effect of these biomaterials on macrophage polarization, we conducted experimental analysis that contained estimating cytokine release profiles and characterizing cell morphology. Our results demonstrated the potential of the hydroxyapatite-deposited bone surface-mimicked PLA membranes to trigger sequential and synergistic M1 and M2 macrophage polarizations, suggesting their ability to achieve osteoimmunomodulatory macrophage polarization for bone tissue engineering applications. Although further experimental studies are required to completely investigate the osteoimmunomodulatory effects of these biomaterials, our results provide valuable insights into the potential advantages of biomaterials that mimic the complex microenvironment of bone surfaces.
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Affiliation(s)
- Birgün Özcolak
- Biomimetic and Bioinspired Biomaterials Research Laboratory, Institute of Biomedical Engineering, Boğaziçi University, 34684, Istanbul, Turkey
- Department of Biomedical Engineering, School of Engineering and Natural Sciences, Istanbul Medipol University, 34810, Istanbul, Turkey
| | - Berkay Erenay
- Biomimetic and Bioinspired Biomaterials Research Laboratory, Institute of Biomedical Engineering, Boğaziçi University, 34684, Istanbul, Turkey
| | - Sedat Odabaş
- Biomaterials and Tissue Engineering Laboratory (bteLAB), Department of Chemistry, Faculty of Science, Ankara University, 06560, Ankara, Turkey
- Interdisciplinary Research Unit for Advanced Materials (INTRAM), Ankara University, 06560, Ankara, Turkey
| | - Klaus D Jandt
- Chair of Materials Science (CMS), Otto Schott Institute of Materials Research, Faculty of Physics and Astronomy, Friedrich Schiller University Jena, Löbdergraben 32, 07743, Jena, Germany
| | - Bora Garipcan
- Biomimetic and Bioinspired Biomaterials Research Laboratory, Institute of Biomedical Engineering, Boğaziçi University, 34684, Istanbul, Turkey.
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Savin G, Caillol S, Bethry A, Rondet E, Assor M, David G, Nottelet B. Collagen/polyester-polyurethane porous scaffolds for use in meniscal repair. Biomater Sci 2024; 12:2960-2977. [PMID: 38682257 DOI: 10.1039/d4bm00234b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Focusing on the regeneration of damaged knee meniscus, we propose a hybrid scaffold made of poly(ester-urethane) (PEU) and collagen that combines suitable mechanical properties with enhanced biological integration. To ensure biocompatibility and degradability, the degradable PEU was prepared from a poly(ε-caprolactone), L-lysine diisocyanate prepolymer (PCL di-NCO) and poly(lactic-co-glycolic acid) diol (PLGA). The resulting PEU (Mn = 52 000 g mol-1) was used to prepare porous scaffolds using the solvent casting (SC)/particle leaching (PL) method at an optimized salt/PEU weight ratio of 5 : 1. The morphology, pore size and porosity of the scaffolds were evaluated by SEM showing interconnected pores with a uniform size of around 170 μm. Mechanical properties were found to be close to those of the human meniscus (Ey ∼ 0.6 MPa at 37 °C). To enhance the biological properties, incorporation of collagen type 1 (Col) was then performed via soaking, injection or forced infiltration. The latter yielded the best results as shown by SEM-EDX and X-ray tomography analyses that confirmed the morphology and highlighted the efficient pore Col-coating with an average of 0.3 wt% Col in the scaffolds. Finally, in vitro L929 cell assays confirmed higher cell proliferation and an improved cellular affinity towards the proposed scaffolds compared to culture plates and a gold standard commercial meniscal implant.
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Affiliation(s)
- Gaëlle Savin
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
- Arthrocart Biotech, Marseille, France.
| | | | - Audrey Bethry
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Eric Rondet
- QualiSud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de la Réunion, Montpellier, France.
| | | | - Ghislain David
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Benjamin Nottelet
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France.
- Department of Pharmacy, Nîmes University Hospital, 30900, Nimes, France
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Immobilization of Gelatin on Fibers for Tissue Engineering Applications: A Comparative Study of Three Aliphatic Polyesters. Polymers (Basel) 2022; 14:polym14194154. [PMID: 36236102 PMCID: PMC9572612 DOI: 10.3390/polym14194154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 12/02/2022] Open
Abstract
Immobilization of cell adhesive proteins on the scaffold surface has become a widely reported method that can improve the interaction between scaffold and cells. In this study, three nanofibrous scaffolds obtained by electrospinning of poly(caprolactone) (PCL), poly(L-lactide-co-caprolactone) (PLCL) 70:30, or poly(L-lactide) (PLLA) were subjected to chemical immobilization of gelatin based on aminolysis and glutaraldehyde cross-linking, as well as physisorption of gelatin. Two sets of aminolysis conditions were applied to evaluate the impact of amine group content. Based on the results of the colorimetric bicinchoninic acid (BCA) assay, it was shown that the concentration of gelatin on the surface is higher for the chemical modification and increases with the concentration of free NH2 groups. XPS (X-ray photoelectron spectroscopy) analysis confirmed this outcome. On the basis of XPS results, the thickness of the gelatin layer was estimated to be less than 10 nm. Initially, hydrophobic scaffolds are completely wettable after coating with gelatin, and the time of waterdrop absorption was correlated with the surface concentration of gelatin. In the case of all physically and mildly chemically modified samples, the decrease in stress and strain at break was relatively low, contrary to strongly aminolyzed PLCL and PLLA samples. Incubation testing performed on the PCL samples showed that a chemically immobilized gelatin layer is more stable than a physisorbed one; however, even after 90 days, more than 60% of the initial gelatin concentration was still present on the surface of physically modified samples. Mouse fibroblast L929 cell culture on modified samples indicates a positive effect of both physical and chemical modification on cell morphology. In the case of PCL and PLCL, the best morphology, characterized by stretched filopodia, was observed after stronger chemical modification, while for PLLA, there was no significant difference between modified samples. Results of metabolic activity indicate the better effect of chemical immobilization than of physisorption of gelatin.
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Wang W, Liu Y, Ye L, Coates P, Caton-Rose F, Zhao X. Biocompatibility improvement and controlled in vitro degradation of poly (lactic acid)-b-poly(lactide-co-caprolactone) by formation of highly oriented structure for orthopedic application. J Biomed Mater Res B Appl Biomater 2022; 110:2480-2493. [PMID: 35674722 DOI: 10.1002/jbm.b.35106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 04/25/2022] [Accepted: 05/20/2022] [Indexed: 12/21/2022]
Abstract
Poly (lactic acid) (PLA) has been proposed as a promising orthopedic implant material, whereas insufficient mechanical strength, unsatisfied biocompatibility and inappropriate degradation rate restrict its further application. In this work, self-reinforced poly (lactic acid)-b-poly(lactide-co-caprolactone) (PLA-b-PLCL) block copolymer with long-chain branches was fabricated through two-stage orientation. Compared with smooth and hydrophobic PLA surface, the surface of PLA-b-PLCL presented micro-phase separated structure with improved hydrophilicity, and cells seeded on it showed improved adhesion/proliferation and high alkaline phosphatase (ALP) activity. After the 1st stage orientation at temperature higher than Tg1 (glass transition temperature of PLA phase), the amount of CH3 and CO groups on surface of PLA-b-PLCL increased, while "groove-ridge" structure formed, resulting in enhancement of surface hydrophobicity. After the 2nd stage orientation at Tg1 ~ Tg2 (glass transition temperature of PLCL phase), surface hydrophobicity/amount of CO groups further increased and "groove-ridge" structure became more significant. Due to suitable wettability and enhanced material-cell mechanical interlocking, cell proliferation/ALP activity were improved and a continuous cell layer formed on sample surface. During in vitro degradation in phosphate buffered saline solution, by introduction of PLCL segments, the crystallinity decreased and solution absorption increased, resulting in a rapid deterioration of mechanical properties. After the 1st stage orientation, a dense microfibrillar structure with high crystallinity formed, which hindered diffusion of solution and delay hydrolytic degradation. After the 2nd stage orientation, PLCL segments were arranged more closely, resulting in a further inhibition of degradation, which was helpful for controlling the strength decay rate of PLA as bone fixation materials.
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Affiliation(s)
- Wuyou Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Yalong Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Lin Ye
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Phil Coates
- School of Engineering, Design and Technology, University of Bradford, Bradford, UK
| | - Fin Caton-Rose
- School of Engineering, Design and Technology, University of Bradford, Bradford, UK
| | - Xiaowen Zhao
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
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Arifin MA, Mel M, Swan SY, Samsudin N, Hashim YZHY, Salleh HM. Optimization of ultraviolet/ozone (UVO 3) process conditions for the preparation of gelatin coated polystyrene (PS) microcarriers. Prep Biochem Biotechnol 2021; 52:181-196. [PMID: 34010098 DOI: 10.1080/10826068.2021.1923031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The aim of this study was to develop gelatin coated polystyrene (PS) microcarriers with good cell adhesion and proliferation properties. PS microspheres, prepared using oil-in water (o/w) solvent evaporation method, were loaded with oxygen containing functional groups using an ultraviolet/ozone (UVO3) system. Using water-soluble carbodiimide chemistry, gelatin was subsequently immobilized on UVO3 treated PS microspheres. The amount of immobilized gelatin was found to be directly proportional to the surface carboxyl (COOH) concentration on PS microspheres. Face Centered Central Composite Design (FCCD) was employed to optimize the process conditions of UVO3 treatment to maximize the surface COOH concentration on PS microspheres for allowing higher gelatin immobilization. Statistical results revealed that, the optimized process conditions were ozone flow rate of ∼64,603 ppm, exposure time of ∼60 minutes and sample amount of 5.05 g. Under these conditions, the surface COOH concentration on PS microspheres was ∼1,505 nmol/g with the corresponding amount of immobilized gelatin was ∼2,725 µg/g. Characterization analyses strongly suggest that the optimized UVO3 treatment and successive gelatin immobilization have successfully improved surface wettability and dispersion stability of PS microspheres. Moreover, gelatin coated PS microcarriers were also proven as able to support the growth of CHO-K1 cells in high cell density culture.
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Affiliation(s)
- Mohd Azmir Arifin
- Faculty of Chemical and Process Engineering Technology, Lebuhraya Tun Razak, Universiti Malaysia Pahang, Kuantan, Malaysia
| | - Maizirwan Mel
- Department of Biotechnology Engineering, International Islamic University Malaysia Kulliyyah of Engineering, Kuala Lumpur, Malaysia
| | - Sia Yiik Swan
- Faculty of Chemical and Process Engineering Technology, Lebuhraya Tun Razak, Universiti Malaysia Pahang, Kuantan, Malaysia
| | - Nurhusna Samsudin
- International Institute for Halal Research and Training, International Islamic University Malaysia, Kuala Lumpur, Malaysia
| | - Yumi Zuhanis Has-Yun Hashim
- International Institute for Halal Research and Training, International Islamic University Malaysia, Kuala Lumpur, Malaysia
| | - Hamzah Mohd Salleh
- International Institute for Halal Research and Training, International Islamic University Malaysia, Kuala Lumpur, Malaysia
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Nguyen VP, Yoo J, Lee JY, Chung JJ, Hwang JH, Jung Y, Lee SM. Enhanced Mechanical Stability and Biodegradability of Ti-Infiltrated Polylactide. ACS APPLIED MATERIALS & INTERFACES 2020; 12:43501-43512. [PMID: 32893625 DOI: 10.1021/acsami.0c13246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Biodegradable polymers have been often used in place of conventional nondegradable polymers for industrial and medical applications. In particular, polylactide (PLA) has been regarded as a popular ecofriendly plastic and has many advantages like good biocompatibility and processability. Yet, it still has some drawbacks in mechanical properties. Here, we prepared Ti-infiltrated PLA by mimicking the gelatinous jaw of a seaworm whose mechanical properties are toggled up and down by the tiny amount of metal ions, expecting to prepare a new type of alternative. Ti induced significant chemical and microstructural changes in the PLA, which led to a notable improvement in the mechanical properties as compared to the neat PLA. The Ti-infiltrated PLA exhibited high resistance to rapid degradation. More importantly, the toxicity assessment demonstrated that the resulting PLA is still biocompatible and nontoxic. Consequently, we proved that the Ti-infiltrated PLA has high mechanical properties comparable to conventional nondegradable polymers and good biocompatibility as well as delayed biodegradability. We anticipate the current Ti-infiltrated PLA to be an ecofriendly replacement of some conventional plastics, which helps preserve a green environment.
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Affiliation(s)
- Viet Phuong Nguyen
- Nanomechatronics, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
- Department of Nanomechanics, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Jin Yoo
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Ju Young Lee
- Animal Model Research Group, Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology (KIT), Jeongeup 53212, Jeollabuk-do, Republic of Korea
- Division of Human and Environmental toxicology, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Justin J Chung
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Jeong Ho Hwang
- Animal Model Research Group, Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology (KIT), Jeongeup 53212, Jeollabuk-do, Republic of Korea
| | - Youngmee Jung
- Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Seung-Mo Lee
- Nanomechatronics, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
- Department of Nanomechanics, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
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7
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Hsu YI, Yamaoka T. Improved exposure of bioactive peptides to the outermost surface of the polylactic acid nanofiber scaffold. J Biomed Mater Res B Appl Biomater 2019; 108:1274-1280. [PMID: 31429188 DOI: 10.1002/jbm.b.34475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 07/02/2019] [Accepted: 08/06/2019] [Indexed: 12/26/2022]
Abstract
We recently reported a novel method to modify the polylactic acid (PLLA) nanofiber scaffold with IKVAV peptide/oligo (d-lactic acid) (ODLA) heteroconjugates. However, a part of the IKVAV sequence was not exposed to the outermost surface and therefore, cell adhesion was not optimized. In this study, we evaluated two strategies to improve the exposing efficiency of IKVAV. One strategy introduced a hydrophilic diethylene glycol (diEG) segment between IKVAV and ODLA. In the second method, these modified nanofibers were heated to a given temperature and cooled to room temperature in water. The IKVAV peptides at the outermost surface were quantified by the fluorescein isothiocyanate staining method. After being heated above the PLLA glass transition temperature, the exposing efficiency of the IKVAV sequence on the PLLA/ODLA-diEG-IKVAV nanofiber was three times higher than that on the PLLA/ODLA-IKVAV unheated nanofiber. Moreover, nearly 100% of the PC-12 cells seeded onto the PLLA/ODLA-diEG-IKVAV nanofiber and were well distributed, while only 50% of the PC-12 cells seeded onto the PLLA and PLLA/ODLA-IKVAV nanofibers. These strategies markedly enhanced the exposing efficiency of the bioactive peptides; therefore, their use can be applicable to other nanofiber scaffolds.
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Affiliation(s)
- Yu-I Hsu
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Tetsuji Yamaoka
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
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Xv J, Li H, Zhang W, Lai G, Xue H, Zhao J, Tu M, Zeng R. Anti-biofouling and functionalizable bioinspired chitosan-based hydrogel coating via surface photo-immobilization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:398-414. [PMID: 30688155 DOI: 10.1080/09205063.2019.1570435] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Zwitterionic polymer is a new generation of anti-fouling materials with its good resistance to protein and bacterial adhesion. Constructing the anti-fouling surfaces with zwitterionic polymer has been regarded as an effective approach for improving the biocompatibility and biofunctionality of clinic devices. Herein, we reported a facile approach to construct a biodegradable anti-biofouling and functionalizable hydrogel coating via photo-immobilization using commercial polyethylene terephthalate (PET) films as the substrate, based on zwitterionic glycidyl methacrylate-phosphorylcholine-chitosan (PCCs-GMA). The surface structure and physicochemical properties of zwitterionic PCCs-GMA hydrogel coating were investigated by X-ray photoelectron spectroscopy (XPS), atomic force microscope (AFM) and static water contact angle measurement, and its functionalizable sites were detected by fluorescence labeling. Compared with the pristine PET and cationic chitosan - GMA and hydroxypropyltrimethyl ammonium chloride chitosan (HTCC) - GMA hydrogel coatings, zwitterionic PCCs-GMA hydrogel coating exhibited excellent biocompatibility, and significantly reduced protein adsorption for three model proteins of fibrinogen, immunoglobulin and lysozyme, repelled platelet adhesion, as well as showed a high resistance to bacterial attachment of Escherichia coli and Staphylococcus aureus and superior anti-fouling properties to MRC-5 cells. The results indicated that photo-immobilized zwitterionic PCCs-GMA hydrogel coating has perspective as a dual functional platform with integrated antifouling and further biofunctional properties for various biomedical applications.
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Affiliation(s)
- Jiesheng Xv
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Haoying Li
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Wenrui Zhang
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Guichao Lai
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Haoyu Xue
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Jianhao Zhao
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Mei Tu
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
| | - Rong Zeng
- a Department of Materials Science and Engineering College of Chemistry and Materials , Jinan University , Guangzhou , P. R. China
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Norouzi MR, Ghasemi-Mobarakeh L, Gharibi H, Meamar R, Ajalloueian F, Chronakis IS. Surface modification of poly (ethylene terephthalate) fabric by soy protein isolate hydrogel for wound dressing application. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1493684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | | | - Hamidreza Gharibi
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran
| | - Rokhsareh Meamar
- Isfahan Clinical Toxicology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ajalloueian
- Research Group for Nano-Bio Science, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Ioannis S. Chronakis
- Research Group for Nano-Bio Science, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
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Sangsanoh P, Ekapakul N, Israsena N, Suwantong O, Supaphol P. Enhancement of biocompatibility on aligned electrospun poly(3-hydroxybutyrate) scaffold immobilized with laminin towards murine neuroblastoma Neuro2a cell line and rat brain-derived neural stem cells (mNSCs). POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4313] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Pakakrong Sangsanoh
- Technological Center for Electrospun Fibers, The Petroleum and Petrochemical College; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
| | - Natjaya Ekapakul
- Technological Center for Electrospun Fibers, The Petroleum and Petrochemical College; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
| | - Nipan Israsena
- Department of Pharmacology, Faculty of Medicine; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
| | - Orawan Suwantong
- Center of Chemical Innovation for Sustainability (CIS); Mae Fah Luang University; Tasud, Muang Chiang Rai 57100 Thailand
- School of Science; Mae Fah Luang University; Tasud, Muang Chiang Rai 57100 Thailand
| | - Pitt Supaphol
- Technological Center for Electrospun Fibers, The Petroleum and Petrochemical College; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
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Liu X, Xia Y, Liu L, Zhang D, Hou Z. Synthesis of a novel biomedical poly(ester urethane) based on aliphatic uniform-size diisocyanate and the blood compatibility of PEG-grafted surfaces. J Biomater Appl 2018; 32:1329-1342. [PMID: 29547018 DOI: 10.1177/0885328218763912] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The purpose of this study is to offer a novel kind of polyurethane with improved surface blood compatibility for long-term implant biomaterials. In this work, the aliphatic poly(ester-urethane) (PEU) with uniform-size hard segments was prepared and the PEU surface was grafted with hydrophilic poly(ethylene glycol) (PEG). The PEU was obtained by chain-extension of poly(ɛ-caprolactone) (PCL) with isocyanate-terminated urethane triblock. Free amino groups were introduced onto the surface of PEU film via aminolysis with hexamethylenediamine, and then the NH2-grafted PEU surfaces (PEU-NH2) were reacted with isocyanate-terminated monomethoxyl PEG (MPEG-NCO) to obtain the PEG-grafted PEU surfaces (PEU-PEG). Analysis by nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and gel permeation chromatography were performed to confirm the chemical structures of the chain extender, PCL, PEU, and PEU-PEG. Additionally, the influence of aminolysis on the physical-mechanical properties of PEU films was investigated. Two glass transition temperatures and a broad endothermic peak were observed in the differential scanning calorimetry curves of PEU, which demonstrated a microphase-separated and semicrystalline structure, respectively. The PEU-PEG film exhibited excellent mechanical properties with an ultimate stress of ∼39 MPa and an elongation at break of ∼1190%, which was slightly lower than that of PEU, indicating that the aminolysis has little influence on the tensile properties. Evaluation of the blood compatibility of the films by bovine serum albumin adsorption and the platelet adhesion test revealed that the PEG-grafted surface had improved resistance to protein adsorption and excellent resistance to platelet adhesion. In vitro degradation tests showed that the PEU-PEG film could maintain its mechanical properties for more than six months and only lost ∼25% weight after 18 months. Due to the excellent mechanical properties, good blood compatibility and slow degradability, this novel kind of polyurethane hold significant promise for long-term implant biomaterials, especially soft tissue augmentation and regeneration.
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Affiliation(s)
- Xiaolong Liu
- 1 College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
| | - Yiran Xia
- 2 Shandong Academy of Pharmaceutical Sciences, Shandong Provincial Key Laboratory of Biomedical Polymer, Jinan, China
| | - Lulu Liu
- 1 College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
| | - Dongmei Zhang
- 3 Shandong Institute for Food and Drug Control, Jinan, China
| | - Zhaosheng Hou
- 1 College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, China
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12
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Kaczmarek B, Sionkowska A. Chitosan/collagen blends with inorganic and organic additive-A review. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21912] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- B. Kaczmarek
- Department of Chemistry of Biomaterials and Cosmetics; Faculty of Chemistry; Nicolaus Copernicus University in Toruń; Toruń Poland
| | - A. Sionkowska
- Department of Chemistry of Biomaterials and Cosmetics; Faculty of Chemistry; Nicolaus Copernicus University in Toruń; Toruń Poland
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13
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Samsudin N, Hashim YZHY, Arifin MA, Mel M, Salleh HM, Sopyan I, Jimat DN. Optimization of ultraviolet ozone treatment process for improvement of polycaprolactone (PCL) microcarrier performance. Cytotechnology 2017; 69:601-616. [PMID: 28337561 DOI: 10.1007/s10616-017-0071-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/24/2017] [Indexed: 02/01/2023] Open
Abstract
Growing cells on microcarriers may have overcome the limitation of conventional cell culture system. However, the surface functionality of certain polymeric microcarriers for effective cell attachment and growth remains a challenge. Polycaprolactone (PCL), a biodegradable polymer has received considerable attention due to its good mechanical properties and degradation rate. The drawback is the non-polar hydrocarbon moiety which makes it not readily suitable for cell attachment. This report concerns the modification of PCL microcarrier surface (introduction of functional oxygen groups) using ultraviolet irradiation and ozone (UV/O3) system and investigation of the effects of ozone concentration, the amount of PCL and exposure time; where the optimum conditions were found to be at 60,110.52 ppm, 5.5 g PCL and 60 min, respectively. The optimum concentration of carboxyl group (COOH) absorbed on the surface was 1495.92 nmol/g and the amount of gelatin immobilized was 320 ± 0.9 µg/g on UV/O3 treated microcarriers as compared to the untreated (26.83 ± 3 µg/g) microcarriers. The absorption of functional oxygen groups on the surface and the immobilized gelatin was confirmed with the attenuated total reflectance Fourier transformed infrared spectroscopy (ATR-FTIR) and the enhancement of hydrophilicity of the surface was confirmed using water contact angle measurement which decreased (86.93°-49.34°) after UV/O3 treatment and subsequently after immobilization of gelatin. The attachment and growth kinetics for HaCaT skin keratinocyte cells showed that adhesion occurred much more rapidly for oxidized surfaces and gelatin immobilized surface as compared to untreated PCL.
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Affiliation(s)
- Nurhusna Samsudin
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
| | - Yumi Zuhanis Has-Yun Hashim
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia. .,International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Level 3, KICT Building, P.O. Box 10, 50728, Kuala Lumpur, Malaysia.
| | - Mohd Azmir Arifin
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia.,Faculty of Engineering Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia
| | - Maizirwan Mel
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
| | - Hamzah Mohd Salleh
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia. .,International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Level 3, KICT Building, P.O. Box 10, 50728, Kuala Lumpur, Malaysia.
| | - Iis Sopyan
- Department of Manufacturing and Material Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
| | - Dzun Noraini Jimat
- Department of Biotechnology Engineering, Kulliyyah of Engineering, International Islamic University Malaysia, P.O. Box 10, 50728, Kuala Lumpur, Malaysia
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14
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Borzooeian Z, Taslim ME, Borzooeian G, Ghasemi O, Aminlari M. Activity and stability analysis of covalent conjugated lysozyme-single walled carbon nanotubes: potential biomedical and industrial applications. RSC Adv 2017. [DOI: 10.1039/c7ra07189b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Analysis of covalent conjugated lysozyme-single walled carbon nanotubes.
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Affiliation(s)
- Z. Borzooeian
- Department of Mechanical and Industrial Engineering
- College of Engineering
- Northeastern University
- Boston
- USA
| | - M. E. Taslim
- Department of Mechanical and Industrial Engineering
- College of Engineering
- Northeastern University
- Boston
- USA
| | - G. Borzooeian
- Department of Biology
- Payame Noor University of Isfahan
- Iran
| | - O. Ghasemi
- Takeda Pharmaceuticals USA Inc
- Cambridge
- USA
| | - M. Aminlari
- Department of Biochemistry
- School of Veterinary Medicine
- Shiraz University
- Shiraz
- Iran
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15
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Improving cytoactive of endothelial cell by introducing fibronectin to the surface of poly L-Lactic acid fiber mats via dopamine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:373-9. [DOI: 10.1016/j.msec.2016.07.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/23/2016] [Accepted: 07/04/2016] [Indexed: 02/02/2023]
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16
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Stoleru E, Zaharescu T, Hitruc EG, Vesel A, Ioanid EG, Coroaba A, Safrany A, Pricope G, Lungu M, Schick C, Vasile C. Lactoferrin-Immobilized Surfaces onto Functionalized PLA Assisted by the Gamma-Rays and Nitrogen Plasma to Create Materials with Multifunctional Properties. ACS APPLIED MATERIALS & INTERFACES 2016; 8:31902-31915. [PMID: 27933972 DOI: 10.1021/acsami.6b09069] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Both cold nitrogen radiofrequency plasma and gamma irradiation have been applied to activate and functionalize the polylactic acid (PLA) surface and the subsequent lactoferrin immobilization. Modified films were comparatively characterized with respect to the procedure of activation and also with unmodified sample by water contact angle measurements, mass loss, X-ray photoelectron spectroscopy (XPS), attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), atomic force microscopy (AFM), and chemiluminescence measurements. All modified samples exhibit enhanced surface properties mainly those concerning biocompatibility, antimicrobial, and antioxidant properties, and furthermore, they are biodegradable and environmentally friendly. Lactoferrin deposited layer by covalent coupling using carbodiimide chemistry showed a good stability. It was found that the lactoferrin-modified PLA materials present significantly increased oxidative stability. Gamma-irradiated samples and lactoferrin-functionalized samples show higher antioxidant, antimicrobial, and cell proliferation activity than plasma-activated and lactoferrin-functionalized ones. The multifunctional materials thus obtained could find application as biomaterials or as bioactive packaging films.
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Affiliation(s)
- Elena Stoleru
- "P. Poni" Institute of Macromolecular Chemistry, Physical Chemistry Department, Iasi 700487, Romania
| | - Traian Zaharescu
- National Institute for R&D in Electrical Engineering , Bucharest 030138, Romania
| | - Elena Gabriela Hitruc
- "P. Poni" Institute of Macromolecular Chemistry, Physical Chemistry Department, Iasi 700487, Romania
| | - Alenka Vesel
- Jožef Stefan Institute , Ljubljana 1000, Slovenia
| | - Emil G Ioanid
- "P. Poni" Institute of Macromolecular Chemistry, Physical Chemistry Department, Iasi 700487, Romania
| | - Adina Coroaba
- "P. Poni" Institute of Macromolecular Chemistry, Physical Chemistry Department, Iasi 700487, Romania
| | - Agnes Safrany
- Department of Nuclear Sciences and Applications, International Atomic Energy Agency, Vienna 1400, Austria
| | - Gina Pricope
- Veterinary and Food Safety Laboratory, Food Safety Department, Iasi 700487, Romania
| | - Maria Lungu
- National Institute of Research and Development for Biological Sciences , Bucharest 060031, Romania
| | - Christoph Schick
- Universität Rostock, Institut für Physik , Rostock 18059, Germany
| | - Cornelia Vasile
- "P. Poni" Institute of Macromolecular Chemistry, Physical Chemistry Department, Iasi 700487, Romania
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17
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Yamada R, Suzuki Y, Yasuda M, Ogino H. Immobilization of proteins on synthetic resins using supercritical carbon dioxide. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Koniev O, Wagner A. Developments and recent advancements in the field of endogenous amino acid selective bond forming reactions for bioconjugation. Chem Soc Rev 2015; 44:5495-551. [PMID: 26000775 DOI: 10.1039/c5cs00048c] [Citation(s) in RCA: 388] [Impact Index Per Article: 43.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Bioconjugation methodologies have proven to play a central enabling role in the recent development of biotherapeutics and chemical biology approaches. Recent endeavours in these fields shed light on unprecedented chemical challenges to attain bioselectivity, biocompatibility, and biostability required by modern applications. In this review the current developments in various techniques of selective bond forming reactions of proteins and peptides were highlighted. The utility of each endogenous amino acid-selective conjugation methodology in the fields of biology and protein science has been surveyed with emphasis on the most relevant among reported transformations; selectivity and practical use have been discussed.
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Affiliation(s)
- Oleksandr Koniev
- Laboratory of Functional Chemo-Systems (UMR 7199), Labex Medalis, University of Strasbourg, 74 Route du Rhin, 67401 Illkirch-Graffenstaden, France.
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19
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Gomes S, Rodrigues G, Martins G, Roberto M, Mafra M, Henriques C, Silva J. In vitro and in vivo evaluation of electrospun nanofibers of PCL, chitosan and gelatin: A comparative study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:348-58. [DOI: 10.1016/j.msec.2014.10.051] [Citation(s) in RCA: 166] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 09/20/2014] [Accepted: 10/21/2014] [Indexed: 11/28/2022]
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20
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Lim JI, Im H, Lee WK. Fabrication of porous chitosan-polyvinyl pyrrolidone scaffolds from a quaternary system via phase separation. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 26:32-41. [PMID: 25410721 DOI: 10.1080/09205063.2014.979386] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Three-dimensional porous chitosan-polyvinyl pyrrolidone (PVP) scaffolds were fabricated for tissue engineering applications via liquid-liquid or liquid-solid phase separation. A mixture of an acidic aqueous solution with butanol as a non-solvent and a chitosan-PVP quaternary system were freeze-dried. We then studied the homogenous open pore structure and the minute pore distribution in order to improve the mass transfer and cell seeding efficiency while also obtaining the optimal ratio of PVP to provide high interconnectivity and to improve the open-pore structure. The properties of the porous chitosan-PVP scaffolds - including the microstructure, chemical release, water absorption properties, and cell proliferation tests were studied - and the results were compared against those obtained from conventional scaffolds. chitosan-PVP scaffolds with a porosity of over 70% were obtained, and the pore morphology on the surface and within the porous scaffolds showed the presence of homogenous open pores with excellent interconnectivity. As the PVP content increased, main pores (50-100 μm) and minute pores (4-10 μm) could be clearly observed. Also, the porous scaffold showed an improved efficiency for cell adhesion after the cells were cultured for 4 h. After 72 h, the cultured cells presented an increase in the cell proliferation and on the porous scaffolds. These results strongly suggest that the porous chitosan-PVP scaffolds can be widely used in tissue engineering, including for biopatches and artificial skin applications.
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Affiliation(s)
- Jin Ik Lim
- a Laboratory of Biointerfaces/Tissue Engineering, Department of Chemical Engineering, Institute of Tissue Regeneration Engineering, College of Engineering , Dankook University , Jukjeon-dong, Yongin-si , Gyeonggi-do , Republic of Korea
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21
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Hossain KMZ, Hasan MS, Boyd D, Rudd CD, Ahmed I, Thielemans W. Effect of cellulose nanowhiskers on surface morphology, mechanical properties, and cell adhesion of melt-drawn polylactic Acid fibers. Biomacromolecules 2014; 15:1498-506. [PMID: 24725085 DOI: 10.1021/bm5001444] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polylactic acid (PLA) fibers were produced with an average diameter of 11.2 (± 0.9) μm via a melt-drawing process. The surface of the PLA fibers was coated with blends of cellulose nanowhiskers (CNWs) (65 to 95 wt %) and polyvinyl acetate (PVAc). The CNWs bound to the smooth PLA fiber surface imparted roughness, with the degree of roughness depending on the coating blend used. The fiber tensile modulus increased 45% to 7 GPa after coating with 75 wt % CNWs compared with the uncoated PLA fibers, and a significant increase in the fiber moisture absorption properties at different humidity levels was also determined. Cytocompatibility studies using NIH-3T3 mouse fibroblast cells cultured onto CNWs-coated PLA surface revealed improved cell adhesion compared with the PLA control, making this CNW surface treatment applicable for biomedical and tissue engineering applications. Initial studies also showed complete cell coverage within 2 days.
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Affiliation(s)
- Kazi M Zakir Hossain
- Division of Materials, Mechanics and Structures, Faculty of Engineering, ‡School of Chemistry, and §Process and Environmental Research Division, Faculty of Engineering, University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
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22
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Kakinoki S, Yamaoka T. Thermoresponsive elastin/laminin mimicking artificial protein for modifying PLLA scaffolds in nerve regeneration. J Mater Chem B 2014; 2:5061-5067. [DOI: 10.1039/c4tb00305e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Poly(l-lactic acid) (PLLA) is widely used as a scaffold but does not possess biological functions.
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Affiliation(s)
- Sachiro Kakinoki
- Department of Biomedical Engineering
- National Cerebral and Cardiovascular Center Research Institute
- Suita, Japan
- JST
- CREST
| | - Tetsuji Yamaoka
- Department of Biomedical Engineering
- National Cerebral and Cardiovascular Center Research Institute
- Suita, Japan
- JST
- CREST
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23
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Chaisri P, Chingsungnoen A, Siri S. Repetitive Arg-Gly-Asp peptide as a cell-stimulating agent on electrospun poly(ϵ-caprolactone) scaffold for tissue engineering. Biotechnol J 2013; 8:1323-31. [DOI: 10.1002/biot.201300191] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 07/25/2013] [Accepted: 08/29/2013] [Indexed: 01/19/2023]
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24
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Takatsuji Y, Yamasaki R, Iwanaga A, Lienemann M, Linder MB, Haruyama T. Solid-support immobilization of a "swing" fusion protein for enhanced glucose oxidase catalytic activity. Colloids Surf B Biointerfaces 2013; 112:186-91. [PMID: 23974004 DOI: 10.1016/j.colsurfb.2013.07.051] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 07/10/2013] [Accepted: 07/26/2013] [Indexed: 02/04/2023]
Abstract
The strategic surface immobilization of a protein can add new functionality to a solid substrate; however, protein activity, e.g., enzymatic activity, can be drastically decreased on immobilization onto a solid surface. The concept of a designed and optimized "molecular interface" is herein introduced in order to address this problem. In this study, molecular interface was designed and constructed with the aim of attaining high enzymatic activity of a solid-surface-immobilized a using the hydrophobin HFBI protein in conjunction with a fusion protein of HFBI attached to glucose oxidase (GOx). The ability of HFBI to form a self-organized membrane on a solid surface in addition to its adhesion properties makes it an ideal candidate for immobilization. The developed fusion protein was also able to form an organized membrane, and its structure and immobilized state on a solid surface were investigated using QCM-D measurements. This method of immobilization showed retention of high enzymatic activity and the ability to control the density of the immobilized enzyme. In this study, we demonstrated the importance of the design and construction of molecular interface for numerous purposes. This method of protein immobilization could be utilized for preparation of high throughput products requiring structurally ordered molecular interfaces, in addition to many other applications.
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Affiliation(s)
- Yoshiyuki Takatsuji
- Department of Biological Functions and Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, 808-0196, Japan; JST ACT-C, Japan
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25
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Yang P, Yang W. Surface Chemoselective Phototransformation of C–H Bonds on Organic Polymeric Materials and Related High-Tech Applications. Chem Rev 2013; 113:5547-94. [PMID: 23614481 DOI: 10.1021/cr300246p] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Peng Yang
- Key Laboratory
of Applied Surface
and Colloid Chemistry, Ministry of Education, College of Chemistry
and Chemical Engineering, Shaanxi Normal University, Xi’an 710062, China
| | - Wantai Yang
- The State Key Laboratory of
Chemical Resource Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing
100029, China
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26
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Structure, morphology and cell affinity of poly(l-lactide) films surface-functionalized with chitosan nanofibers via a solid–liquid phase separation technique. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1546-53. [DOI: 10.1016/j.msec.2012.12.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 10/29/2012] [Accepted: 12/17/2012] [Indexed: 11/22/2022]
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27
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She MS, Lo TY, Ho RM. Long-range ordering of block copolymer cylinders driven by combining thermal annealing and substrate functionalization. ACS NANO 2013; 7:2000-2011. [PMID: 23438409 DOI: 10.1021/nn305725q] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This work presents a new method for forming well-defined nanostructured thin films from self-assembled polystyrene-block-poly(l-lactide) (PS-PLLA) on Si wafers with a functionalized SiO2 surface. Large, well-ordered, perpendicular PLLA cylinders in PS-PLLA thin films can be formed using the functionalized substrate. In contrast to random copolymers, a neutral substrate for the PS and PLLA blocks is formed by functionalizing a substrate with hydroxyl-terminated PS (PS-OH) followed by hydroxyl-terminated PLLA (PLLA-OH). The heterogeneous grafting of PS-OH and PLLA-OH can be substantially alleviated using this two-step functionalization. Accordingly, the surface properties can be fine-tuned by controlling the ratio of grafted PS-OH to PLLA-OH to control the orientation of the PLLA cylinders on the functionalized SiO2. Nevertheless, the orientation that is driven by the neutral substrate is surprisingly limited in that the effective length of orienting cylinders is less than twice the interdomain spacing. Thermal annealing at high temperature can yield a neutral air surface, rendering perpendicular PLLA cylinders that stand sub-micrometers from the air surface. Consequently, the neutral substrate can be used to enable truly film-spanning perpendicular cylinders in films to be fabricated using the high-temperature thermal treatment. In addition, the perpendicular cylinders can be laterally ordered by further increasing the annealing temperature. The ability to create these film-spanning perpendicular cylinders in films with a well-ordered texture and sub-micrometer thickness opens up possible applications in nanotechnology.
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Affiliation(s)
- Ming-Shiuan She
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Republic of China
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28
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Diao H, Si Y, Zhu A, Ji L, Shi H. Surface modified nano-hydroxyapatite/poly(lactide acid) composite and its osteocyte compatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1796-1801. [DOI: 10.1016/j.msec.2012.04.065] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 04/02/2012] [Accepted: 04/24/2012] [Indexed: 11/25/2022]
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29
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Li XQ, Feng Z, Xia Y, Zeng HC. Protein-Assisted Synthesis of Double-Shelled CaCO3 Microcapsules and Their Mineralization with Heavy Metal Ions. Chemistry 2012; 18:1945-52. [DOI: 10.1002/chem.201102877] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Indexed: 11/06/2022]
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30
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Nipithakul T, Watthanachote L, Kalapat N. Preliminary study of extractable protein binding using maleic anhydride copolymer. CHINESE JOURNAL OF POLYMER SCIENCE 2011. [DOI: 10.1007/s10118-012-1112-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Shen J, Li Y, Zuo Y, Zou Q, Zhang L, Liu H. Surface Modification of Polyamide 6 Immobilized with Collagen: Characterization and Cytocompatibility. INT J POLYM MATER PO 2011. [DOI: 10.1080/00914037.2010.551370] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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32
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Hwang IT, Kuk IS, Jung CH, Choi JH, Nho YC, Lee YM. Efficient immobilization and patterning of biomolecules on poly(ethylene terephthalate) films functionalized by ion irradiation for biosensor applications. ACS APPLIED MATERIALS & INTERFACES 2011; 3:2235-2239. [PMID: 21699214 DOI: 10.1021/am200630p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The surface of a poly(ethylene terephthalate) (PET) film was selectively irradiated with proton beams at various fluences to generate carboxylic acid groups on the surface; the resulting functionalized PET surface was then characterized in terms of its wettability, chemical structure, and chemical composition. The results revealed that (i) carboxylic acid groups were successfully generated in the irradiated regions of the PET surface, and (ii) their relative amounts were dependent on the fluence. A capture biomolecule, anthrax toxin probe DNA, was selectively immobilized on the irradiated regions on the PET surface. Cy3-labeled DNA as a target biomolecule was then hybridized with the probe DNA immobilized on the PET surface. Liver-cancer-specific α-fetoprotein (AFP) antigen, as a target biomolecule, was also selectively immobilized on the irradiated regions on the PET surface. Texas Red-labeled secondary antibody was then reacted with an AFP-specific primary antibody prebound to the AFP antigen on the PET surface for the detection of the target antigen, using an indirect immunoassay method. The results revealed that (i) well-defined micropatterns of biomolecules were successfully formed on the functionalized PET surfaces and (ii) the fluorescence intensity of the micropatterns was dependent mainly on the concentrations of the target DNA hybridized to the probe DNA and the target AFP antigen immobilized on the PET films. The lowest detectable concentrations of the target DNA and target AFP antigen in this study were determined to be 4 and 16 ng/mL, respectively, with the PET film prepared at a fluence of 5 × 10(14) ions/cm(2).
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Affiliation(s)
- In-Tae Hwang
- Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup-si, Jeollabuk-do 580-185, Republic of Korea
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33
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Alves NM, Fernandes LS, Levato R, Mano JF. Preparation and Characterization of New Biodegradable Films Made from Poly(L-Lactic Acid) and Chitosan Blends Using a Common Solvent. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2010.502493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- NatÁLIA M. Alves
- a 3B's Research Group—Biomaterials , Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark , Taipas , Guimarães , Portugal
- b IBB—Institute for Biotechnology and Bioengineering , PT Associated Laboratory , Guimarães , Portugal
| | - LuÍS S. Fernandes
- a 3B's Research Group—Biomaterials , Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark , Taipas , Guimarães , Portugal
- b IBB—Institute for Biotechnology and Bioengineering , PT Associated Laboratory , Guimarães , Portugal
| | - Riccardo Levato
- a 3B's Research Group—Biomaterials , Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark , Taipas , Guimarães , Portugal
- b IBB—Institute for Biotechnology and Bioengineering , PT Associated Laboratory , Guimarães , Portugal
| | - JoãO F. Mano
- a 3B's Research Group—Biomaterials , Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark , Taipas , Guimarães , Portugal
- b IBB—Institute for Biotechnology and Bioengineering , PT Associated Laboratory , Guimarães , Portugal
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34
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Surface Modification of Poly(L-lactic acid) Nanofiber with Oligo(D-lactic acid) Bioactive-Peptide Conjugates for Peripheral Nerve Regeneration. Polymers (Basel) 2011. [DOI: 10.3390/polym3020820] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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35
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Grafahrend D, Heffels KH, Beer MV, Gasteier P, Möller M, Boehm G, Dalton PD, Groll J. Degradable polyester scaffolds with controlled surface chemistry combining minimal protein adsorption with specific bioactivation. NATURE MATERIALS 2011; 10:67-73. [PMID: 21151163 DOI: 10.1038/nmat2904] [Citation(s) in RCA: 218] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Accepted: 10/26/2010] [Indexed: 05/21/2023]
Abstract
Advanced biomaterials and scaffolds for tissue engineering place high demands on materials and exceed the passive biocompatibility requirements previously considered acceptable for biomedical implants. Together with degradability, the activation of specific cell–material interactions and a three-dimensional environment that mimics the extracellular matrix are core challenges and prerequisites for the organization of living cells to functional tissue. Moreover, although bioactive signalling combined with minimization of non-specific protein adsorption is an advanced modification technique for flat surfaces, it is usually not accomplished for three-dimensional fibrous scaffolds used in tissue engineering. Here, we present a one-step preparation of fully synthetic, bioactive and degradable extracellular matrix-mimetic scaffolds by electrospinning, using poly(D,L-lactide-co-glycolide) as the matrix polymer. Addition of a functional, amphiphilic macromolecule based on star-shaped poly(ethylene oxide) transforms current biomedically used degradable polyesters into hydrophilic fibres, which causes the suppression of non-specific protein adsorption on the fibres’ surface. The subsequent covalent attachment of cell-adhesion-mediating peptides to the hydrophilic fibres promotes specific bioactivation and enables adhesion of cells through exclusive recognition of the immobilized binding motifs. This approach permits synthetic materials to directly control cell behaviour, for example, resembling the binding of cells to fibronectin immobilized on collagen fibres in the extracellular matrix of connective tissue.
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Affiliation(s)
- Dirk Grafahrend
- DWI e.V. and Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Pauwelsstr. 8, D-52056 Aachen, Germany
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Yan T, Sun R, Li C, Tan B, Mao X, Ao N. Immobilization of type-I collagen and basic fibroblast growth factor (bFGF) onto poly (HEMA-co-MMA) hydrogel surface and its cytotoxicity study. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:2425-2433. [PMID: 20502949 DOI: 10.1007/s10856-010-4094-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Accepted: 05/05/2010] [Indexed: 05/28/2023]
Abstract
Type-I collagen and bFGF were immobilized onto the surface of poly (HEMA-co-MMA) hydrogel by grafting and coating methods to improve its cytotoxicity. The multi-layered structure of the biocompatible layer was confirmed by FTIR, AFM and static water contact angles. The layers were stable in body-like environment (pH 7.4). Human skin fibroblast cells (HSFC) were seeded onto Col/bFGF-poly (HEMA-co-MMA), Col-poly (HEMA-co-MMA) and poly (HEMA-co-MMA) films for 1, 3 and 5 day. MTT assay was performed to evaluate the extraction toxicity of the materials. Results showed that the cell attachment, proliferation and differentiation on Col/bFGF-poly (HEMA-co-MMA) film were higher than those of the control group, which indicated the improvement of cell-material interaction. The extraction toxicity of the modified materials was also lower than that of the unmodified group. The protein and bFGF immobilized poly (HEMA-co-MMA) hydrogel might hold great promise to be a biocompatible material.
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Affiliation(s)
- Tuo Yan
- Department of Biomedical Engineering, Jinan University, Guangzhou, China.
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Stable modification of poly(lactic acid) surface with neurite outgrowth-promoting peptides via hydrophobic collagen-like sequence. Acta Biomater 2010; 6:1925-30. [PMID: 19969110 DOI: 10.1016/j.actbio.2009.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 11/11/2009] [Accepted: 12/01/2009] [Indexed: 12/20/2022]
Abstract
Surface modification of poly(dl-lactic acid) (PLA) scaffolds has been performed using a biofunctional small peptide composed of collagen-like repetitive sequence and laminin-derived sequence (AG73-G(3)-(PPG)(5)) via hydrophobic interaction. The results of surface analysis suggest that AG73-G(3)-(PPG)(5) can be stably adsorbed onto PLA films via hydrophobic interaction at the (PPG)(5) region, and form an extracellular matrix-like layer composed of both structural and biosignalling sequences. In addition, neurite outgrowth of PC12 cells was observed on the AG73-G(3)-(PPG)(5)-adsorbed PLA film. These results indicate that AG73-G(3)-(PPG)(5) very effectively enhances neurite outgrowth activity on PLA films. The hydrophobic adsorption of collagen-like peptide bound to biosignalling molecules may be widely applied as a surface modifier of PLA films for tissue engineering.
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Kim DK, Ganesan R, Jung CH, Hwang IT, Choi JH, Kim JB, Nho YC, Suh DH. Micropatterning of proteins on ion beam-induced poly(acrylic acid)-grafted polyethylene film. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1706] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Cai K, Kong T, Wang L, Liu P, Yang W, Chen C. Regulation of endothelial cells migration on poly(D, L-lactic acid) films immobilized with collagen gradients. Colloids Surf B Biointerfaces 2010; 79:291-7. [PMID: 20462745 DOI: 10.1016/j.colsurfb.2010.04.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Revised: 04/12/2010] [Accepted: 04/15/2010] [Indexed: 11/15/2022]
Abstract
To investigate the effect of protein surface-density gradient on the motility of endothelial cells, we developed a novel approach for the fabrication of a collagen density gradient onto poly(d, l-lactic acid) (PDLLA) films in this study. The approach involves a sequential alkali hydrolysis of PDLLA films to produce a density gradient of -COOH moieties onto the films, which were activated and then covalently linked with collagen. A collagen surface-density gradient onto PDLLA films was thus generated by this approach. Contact angle measurement and confocal laser scanning microscopy (CLSM) were employed to confirm the formation of -COOH gradient and collagen gradient, respectively. All results proved the feasibility of the fabrication of a collagen density gradient onto PDLLA films via the approach. Endothelial cells cultured on the gradient areas with low and moderate collagen surface-densities displayed a strong motility tendency, with the values such as net displacement, total distance, chemotactic index, migration rate and cell trajectories in parallel to the gradient. However, endothelial cells grew on the gradient area with high collagen density demonstrated a reverse response to the collagen gradient clue. These results suggest that cell motility is regulated by the collagen gradient with a surface-density dependent manner. This study provides an alternative for the fabrication of protein surface-density gradient onto biodegradable substrates to investigate chemical stimuli induced cell directional motility. It is potentially important for understanding the controlled angiogenesis for implantation of tissue-engineered constructs.
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Affiliation(s)
- Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, PR China.
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Lao HK, Renard E, Langlois V, Vallée-Rehel K, Linossier I. Surface functionalization of PHBV by HEMA grafting via UV treatment: Comparison with thermal free radical polymerization. J Appl Polym Sci 2010. [DOI: 10.1002/app.31507] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Xu D, Wu K, Zhang Q, Hu H, Xi K, Chen Q, Yu X, Chen J, Jia X. Synthesis and biocompatibility of anionic polyurethane nanoparticles coated with adsorbed chitosan. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bayramoğlu G, Kayaman-Apohan N, Akçakaya H, Vezir Kahraman M, Erdem Kuruca S, Güngör A. Preparation of collagen modified photopolymers: a new type of biodegradable gel for cell growth. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:761-775. [PMID: 19936889 DOI: 10.1007/s10856-009-3929-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Accepted: 10/30/2009] [Indexed: 05/28/2023]
Abstract
In this study a new branched methacrylated poly(propylene glycol-co-lactic acid) (PPG-PLA-IEM) and methacrylated cellulose acetate butyrate resin (CAB-IEM) were synthesized. Hydrogels with various amounts of PPG-PLA-IEM and CAB-IEM (25, 50 and 75 wt% IEM modified) were prepared by photopolymerization. Collagen tethered PEG-monoacrylate (PEGMA-collagen) was prepared and introduced as a bioactive moiety to modify the hydrogel in order to enhance cell affinity. In vitro attachment and growth of 3T3 mouse fibroblasts and human umbilical vein endothelial cells (HUVEC) on the hydrogels with and without collagen were also investigated. It was observed that, the collagen improves the cell adhesion onto the hydrogel surface. With the increasing amount of collagen, cell viability increased by 28% for ECV304 (P < 0.05) and 30% for 3T3 (P < 0.05).
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Affiliation(s)
- Gülay Bayramoğlu
- Faculty of Engineering, Department of Polymer Engineering, Yalova University, 77100 Yalova, Turkey
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Antunes JC, Oliveira JM, Reis RL, Soria JM, Gómez-Ribelles JL, Mano JF. Novel poly(L-lactic acid)/hyaluronic acid macroporous hybrid scaffolds: Characterization and assessment of cytotoxicity. J Biomed Mater Res A 2010; 94:856-69. [DOI: 10.1002/jbm.a.32753] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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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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Degradation of Natural and Artificial Poly[(R)-3-hydroxyalkanoate]s: From Biodegradation to Hydrolysis. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/978-3-642-03287-5_12] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Advantages of drug-incorporated collagen particles have been described for the controlled delivery system for therapeutic actions. The attractiveness of collagen lies in its low immunogenicity and high biocompatibility. It is also recognized by the body as a natural constituent rather than a foreign body. Our research and development efforts are focused towards addressing some of the limitations of collagen, like the high viscosity of an aqueous phase, nondissolution in neutral pH buffers, thermal instability (denaturation) and biodegradability, to make it an ideal material for drug delivery with particular reference to microparticles. These limitations could be overcome by making collagen conjugates with other biomaterials or chemically modifying collagen monomer without affecting its triple helical conformation and maintaining its native properties. This article highlights collagen microparticles' present status as a carrier in drug delivery.
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Affiliation(s)
- Praveen Kumar Sehgal
- Central Leather Research Institute, Bio-products Laboratory, Adyar, Chennai-600020, India.
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Mattanavee W, Suwantong O, Puthong S, Bunaprasert T, Hoven VP, Supaphol P. Immobilization of biomolecules on the surface of electrospun polycaprolactone fibrous scaffolds for tissue engineering. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1076-1085. [PMID: 20355894 DOI: 10.1021/am900048t] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
To make polycaprolactone (PCL) more suitable for tissue engineering, PCL in the form of electrospun fibrous scaffolds was first modified with 1,6-hexamethylenediamine to introduce amino groups on their surface. Various biomolecules, i.e., collagen, chitosan, and Gly-Arg-Gly-Asp-Ser (GRGDS) peptide, were then immobilized on their surface, with N,N'-disuccinimidylcarbonate being used as the coupling agent. Dynamic water contact angle measurement indicated that the scaffold surface became more hydrophilic after the aminolytic treatment and the subsequent immobilization of the biomolecules. The appropriateness of these PCL fibrous scaffolds for the tissue/cell culture was evaluated in vitro with three different cell lines, e.g., mouse fibroblasts (L929), human epidermal keratinocytes (HEK001), and mouse calvaria-derived preosteoblastic cells (MC3T3-E1). Both the neat and the modified PCL fibrous scaffolds released no substances in the levels that were harmful to these cells. Among the various biomolecule-immobilized PCL fibrous scaffolds, the ones that had been immobilized with type I collagen, a Arg-Gly-Asp-containing protein, showed the greatest ability to support both the attachment and the proliferation of all of the investigated cell types, followed by those that had been immobilized with GRGDS peptide.
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Affiliation(s)
- Waradda Mattanavee
- Program of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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Xiao Y, Li D, Chen X, Lu J, Fan H, Zhang X. Preparation and cytocompatibility of chitosan-modified polylactide. J Appl Polym Sci 2008. [DOI: 10.1002/app.28493] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gong Y, Ma Z, Zhou Q, Li J, Gao C, Shen J. Poly(lactic acid) scaffold fabricated by gelatin particle leaching has good biocompatibility for chondrogenesis. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2008; 19:207-21. [PMID: 18237493 DOI: 10.1163/156856208783432453] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Three-dimensional poly(L-lactic acid) (PLLA) scaffolds with high porosity and an average pore size of 280-450 microm were fabricated using gelatin particles as porogen. The particles were bonded together by incubation in saturated water vapor at 70 degrees C for 3.5 h. After casting the PLLA/1,4-dioxane solution, freeze-drying and porogen leaching with 70 degrees C water, a porous scaffold with well-interconnected pores and some nano-fibers was obtained. The biological performance of the scaffold was evaluated by in vitro chondrocyte culture and in vivo implantation. In comparison with the control scaffold fabricated with NaCl particles as porogen under the same conditions, the experimental scaffold had better biological performance because the gelatin molecules were stably entrapped onto the pore surfaces. A larger number of cells in the experimental scaffold were observed by confocal laser scanning microscopy after the viable cells had been stained with fluorescein diacetate. The chondrocytes showed more spreading morphology. Higher cytoviability and secretion of glycosaminoglycan (GAG) were also determined in the experimental scaffold. After implantation of the chondrocytes/PLLA scaffold construct to the subcutaneous dorsum of nude mice for 30-120 days, cartilage-like specimens were harvested. Histological examination showed that the regenerated cartilages had a large quantity of collagen and GAG.
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Affiliation(s)
- Yihong Gong
- Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P.R. China
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Lin Y, Chen X, Jing X, Jiang Y, Su Z. Gelatin multilayers assembled on poly(L-lactic acid) surface for better cytocompatibility. J Appl Polym Sci 2008. [DOI: 10.1002/app.28174] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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