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El Jundi A, Mayor M, Folgado E, Gomri C, Benkhaled BT, Chaix A, Verdie P, Nottelet B, Semsarilar M. Peptide-guided self-assembly of polyethylene glycol-b-poly(ε-caprolactone-g-peptide) block copolymers. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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3
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Labus K, Radosinski L, Kotowski P. Functional Properties of Two-Component Hydrogel Systems Based on Gelatin and Polyvinyl Alcohol-Experimental Studies Supported by Computational Analysis. Int J Mol Sci 2021; 22:9909. [PMID: 34576071 PMCID: PMC8469860 DOI: 10.3390/ijms22189909] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 12/16/2022] Open
Abstract
The presented research is focused on an investigation of the effect of the addition of polyvinyl alcohol (PVA) to a gelatin-based hydrogel on the functional properties of the resulting material. The main purpose was to experimentally determine and compare the properties of hydrogels differing from the content of PVA in the blend. Subsequently, the utility of these matrices for the production of an immobilized invertase preparation with improved operational stability was examined. We also propose a useful computational tool to predict the properties of the final material depending on the proportions of both components in order to design the feature range of the hydrogel blend desired for a strictly specified immobilization system (of enzyme/carrier type). Based on experimental research, it was found that an increase in the PVA content in gelatin hydrogels contributes to obtaining materials with a visibly higher packaging density, degree of swelling, and water absorption capacity. In the case of hydrolytic degradation and compressive strength, the opposite tendency was observed. The functionality studies of gelatin and gelatin/PVA hydrogels for enzyme immobilization indicate the very promising potential of invertase entrapped in a gelatin/PVA hydrogel matrix as a stable biocatalyst for industrial use. The molecular modeling analysis performed in this work provides qualitative information about the tendencies of the macroscopic parameters observed with the increase in the PVA and insight into the chemical nature of these dependencies.
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Affiliation(s)
- Karolina Labus
- Department of Micro, Nano and Bioprocess Engineering, Faculty of Chemistry, Wrocław University of Science and Technology, Norwida 4/6, 50-373 Wrocław, Poland
| | - Lukasz Radosinski
- Department of Micro, Nano and Bioprocess Engineering, Faculty of Chemistry, Wrocław University of Science and Technology, Norwida 4/6, 50-373 Wrocław, Poland
| | - Piotr Kotowski
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland;
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4
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Jiao D, Zheng A, Liu Y, Zhang X, Wang X, Wu J, She W, Lv K, Cao L, Jiang X. Bidirectional differentiation of BMSCs induced by a biomimetic procallus based on a gelatin-reduced graphene oxide reinforced hydrogel for rapid bone regeneration. Bioact Mater 2021; 6:2011-2028. [PMID: 33426373 PMCID: PMC7782557 DOI: 10.1016/j.bioactmat.2020.12.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 11/17/2020] [Accepted: 12/06/2020] [Indexed: 01/07/2023] Open
Abstract
Developmental engineering strategy needs the biomimetic composites that can integrate the progenitor cells, biomaterial matrices and bioactive signals to mimic the natural bone healing process for faster healing and reconstruction of segmental bone defects. We prepared the gelatin-reduced graphene oxide (GOG) and constructed the composites that mimicked the procallus by combining the GOG with the photo-crosslinked gelatin hydrogel. The biological effects of the GOG-reinforced composites could induce the bi-differentiation of bone marrow stromal cells (BMSCs) for rapid bone repair. The proper ratio of GOG in the composites regulated the composites' mechanical properties to a suitable range for the adhesion and proliferation of BMSCs. Besides, the GOG-mediated bidirectional differentiation of BMSCs, including osteogenesis and angiogenesis, could be activated through Erk1/2 and AKT pathway. The methyl vanillate (MV) delivered by GOG also contributed to the bioactive signals of the biomimetic procallus through priming the osteogenesis of BMSCs. During the repair of the calvarial defect in vivo, the initial hypoxic condition due to GOG in the composites gradually transformed into a well-vasculature robust situation with the bi-differentiation of BMSCs, which mimicked the process of bone healing resulting in the rapid bone regeneration. As an inorganic constituent, GOG reinforced the organic photo-crosslinked gelatin hydrogel to form a double-phase biomimetic procallus, which provided the porous extracellular matrix microenvironment and bioactive signals for the bi-directional differentiation of BMSCs. These show a promised application of the bio-reduced graphene oxide in biomedicine with a developmental engineering strategy.
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Affiliation(s)
- Delong Jiao
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Ao Zheng
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Yang Liu
- The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xiangkai Zhang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Xiao Wang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Jiannan Wu
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Wenjun She
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Kaige Lv
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Lingyan Cao
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
| | - Xinquan Jiang
- Department of Prosthodontics, Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China
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5
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Löwenberg C, Tripodo G, Julich‐Gruner KK, Neffe AT, Lendlein A. Supramolecular Gelatin Networks Based on Inclusion Complexes. Macromol Biosci 2020; 20:e2000221. [DOI: 10.1002/mabi.202000221] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/24/2020] [Indexed: 01/30/2023]
Affiliation(s)
- Candy Löwenberg
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies Helmholtz‐Zentrum Geesthacht Teltow 14513 Germany
| | - Giuseppe Tripodo
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies Helmholtz‐Zentrum Geesthacht Teltow 14513 Germany
| | - Konstanze K. Julich‐Gruner
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies Helmholtz‐Zentrum Geesthacht Teltow 14513 Germany
| | - Axel T. Neffe
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies Helmholtz‐Zentrum Geesthacht Teltow 14513 Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin‐Brandenburg Centre for Regenerative Therapies Helmholtz‐Zentrum Geesthacht Teltow 14513 Germany
- Institute of Chemistry University of Potsdam Potsdam 14476 Germany
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6
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Radosinski L, Labus K, Zemojtel P, Wojciechowski JW. Development and Validation of a Virtual Gelatin Model Using Molecular Modeling Computational Tools. Molecules 2019; 24:molecules24183365. [PMID: 31527447 PMCID: PMC6767189 DOI: 10.3390/molecules24183365] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/06/2019] [Accepted: 09/11/2019] [Indexed: 12/19/2022] Open
Abstract
To successfully design and optimize the application of hydrogel matrices one has to effectively combine computational design tools with experimental methods. In this context, one of the most promising techniques is molecular modeling, which requires however accurate molecular models representing the investigated material. Although this method has been successfully used over the years for predicting the properties of polymers, its application to biopolymers, including gelatin, is limited. In this paper we provide a method for creating an atomistic representation of gelatin based on the modified FASTA codes of natural collagen. We show that the model created in this manner reproduces known experimental values of gelatin properties like density, glass-rubber transition temperature, WAXS profile and isobaric thermal expansion coefficient. We also present that molecular dynamics using the INTERFACE force field provides enough accuracy to track changes of density, fractional free volume and Hansen solubility coefficient over a narrow temperature regime (273-318 K) with 1 K accuracy. Thus we depict that using molecular dynamics one can predict properties of gelatin biopolymer as an efficient matrix for immobilization of various bioactive compounds, including enzymes.
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Affiliation(s)
- Lukasz Radosinski
- Department of Bioprocess and Biochemical Engineering, Faculty of Chemistry, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland.
| | - Karolina Labus
- Department of Bioprocess and Biochemical Engineering, Faculty of Chemistry, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland.
| | - Piotr Zemojtel
- Faculty of Chemistry, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland.
| | - Jakub W Wojciechowski
- Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland.
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Edwards-Gayle CJC, Greco F, Hamley IW, Rambo RP, Reza M, Ruokolainen J, Skoulas D, Iatrou H. Self-Assembly of Telechelic Tyrosine End-Capped PEO Star Polymers in Aqueous Solution. Biomacromolecules 2017; 19:167-177. [DOI: 10.1021/acs.biomac.7b01420] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Francesca Greco
- School of Chemistry, Food
Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Ian W. Hamley
- School of Chemistry, Food
Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Robert P. Rambo
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K
| | - Mehedi Reza
- Department of Applied Physics, Aalto School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Janne Ruokolainen
- Department of Applied Physics, Aalto School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Dimitrios Skoulas
- Department of Chemistry, University of Athens, Panepistimiopolis
Zografou, 157 71 Athens, Greece
| | - Hermis Iatrou
- Department of Chemistry, University of Athens, Panepistimiopolis
Zografou, 157 71 Athens, Greece
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8
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Agheb M, Dinari M, Rafienia M, Salehi H. Novel electrospun nanofibers of modified gelatin-tyrosine in cartilage tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:240-251. [DOI: 10.1016/j.msec.2016.10.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 09/12/2016] [Accepted: 10/02/2016] [Indexed: 02/07/2023]
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9
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Knani D, Barkay-Olami H, Alperstein D, Zilberman M. Simulation of novel soy protein-based systems for tissue regeneration applications. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3918] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dafna Knani
- Prof. Ephraim Katzir Department of Biotechnology Engineering; Ort Braude College; PO Box 78 Karmiel 2161002 Israel
| | - Hilla Barkay-Olami
- Department of Biomedical Engineering, Faculty of Engineering; Tel Aviv University; Ramat Aviv Israel
| | - David Alperstein
- Department of Mechanical Engineering; Ort Braude College; PO Box 78 Karmiel 2161002 Israel
| | - Meital Zilberman
- Department of Biomedical Engineering, Faculty of Engineering; Tel Aviv University; Ramat Aviv Israel
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Kirkham S, Castelletto V, Hamley IW, Reza M, Ruokolainen J, Hermida-Merino D, Bilalis P, Iatrou H. Self-Assembly of Telechelic Tyrosine End-Capped PEO and Poly(alanine) Polymers in Aqueous Solution. Biomacromolecules 2016; 17:1186-97. [DOI: 10.1021/acs.biomac.6b00023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Steven Kirkham
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Valeria Castelletto
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Ian William Hamley
- School
of Chemistry, Pharmacy and Food Biosciences, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Mehedi Reza
- Department
of Applied Physics, Aalto University School of Science, P.O. Box 15100 FI-00076 Aalto, Finland
| | - Janne Ruokolainen
- Department
of Applied Physics, Aalto University School of Science, P.O. Box 15100 FI-00076 Aalto, Finland
| | | | - Panayiotis Bilalis
- University of Athens, Department of Chemistry, Panepistimiopolis Zografou, 157 71 Athens, Greece
| | - Hermis Iatrou
- University of Athens, Department of Chemistry, Panepistimiopolis Zografou, 157 71 Athens, Greece
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11
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Peng H, Zhang D, Sun B, Luo Y, Lv S, Wang J, Chen J. Synthesis of protein/hydroxyapatite nano-composites by a high-gravity co-precipitation method. RSC Adv 2016. [DOI: 10.1039/c5ra27018a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A high-gravity co-precipitation strategy was introduced to the fabrication of protein/hydroxyapatite nano-composites with improved protein adsorption efficiencies and enhanced biocompatibilities.
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Affiliation(s)
- H. Peng
- State Key Laboratory of Organic-inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- China
| | - D. Zhang
- State Key Laboratory of Organic-inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- China
- Research Center of the Ministry of Education for High Gravity Engineering & Technology
| | - B. Sun
- State Key Laboratory of Organic-inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- China
- Research Center of the Ministry of Education for High Gravity Engineering & Technology
| | - Y. Luo
- Research Center of the Ministry of Education for High Gravity Engineering & Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - S. Lv
- State Key Laboratory of Organic-inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- China
| | - J. Wang
- State Key Laboratory of Organic-inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- China
- Research Center of the Ministry of Education for High Gravity Engineering & Technology
| | - J. Chen
- State Key Laboratory of Organic-inorganic Composites
- Beijing University of Chemical Technology
- Beijing
- China
- Research Center of the Ministry of Education for High Gravity Engineering & Technology
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12
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Rajesh Krishnan G, Cheah C, Sarkar D. Hybrid Cross-Linking Characteristics of Hydrogel Control Stem Cell Fate. Macromol Biosci 2015; 15:747-55. [DOI: 10.1002/mabi.201400535] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 02/11/2015] [Indexed: 12/17/2022]
Affiliation(s)
- G. Rajesh Krishnan
- Department of Biomedical Engineering; University at Buffalo, The State University of New York; Buffalo NY 14260 USA
| | - Calvin Cheah
- Department of Biomedical Engineering; University at Buffalo, The State University of New York; Buffalo NY 14260 USA
| | - Debanjan Sarkar
- Department of Biomedical Engineering; University at Buffalo, The State University of New York; Buffalo NY 14260 USA
- Department of Chemical and Biological Engineering; University at Buffalo, The State University of New York; Buffalo NY 14260 USA
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Neffe AT, Wischke C, Racheva M, Lendlein A. Progress in biopolymer-based biomaterials and their application in controlled drug delivery. Expert Rev Med Devices 2014; 10:813-33. [DOI: 10.1586/17434440.2013.839209] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Racheva M, Julich-Gruner KK, Nöchel U, Neffe AT, Wischke C, Lendlein A. Influence of Drying Procedures on Network Formation and Properties of Hydrogels from Functionalized Gelatin. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/masy.201300112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Miroslava Racheva
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstrasse 55 14513 Teltow Germany
| | - Konstanze K. Julich-Gruner
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstrasse 55 14513 Teltow Germany
| | - Ulrich Nöchel
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstrasse 55 14513 Teltow Germany
| | - Axel T. Neffe
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstrasse 55 14513 Teltow Germany
| | - Christian Wischke
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstrasse 55 14513 Teltow Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Helmholtz-Zentrum Geesthacht; Kantstrasse 55 14513 Teltow Germany
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Polyalkylcyanoacrylates as in situ formed diffusion barriers in multimaterial drug carriers. J Control Release 2013; 169:321-8. [PMID: 23462672 DOI: 10.1016/j.jconrel.2013.02.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 02/01/2013] [Accepted: 02/14/2013] [Indexed: 11/24/2022]
Abstract
Polymeric hydrogels typically release their drug payload rapidly due to their high water content and the diffusivity for drug molecules. This study proposes a multimaterial system to sustain the release by covering the hydrogel with a poly(alkyl-2-cyanoacrylate) [PACA]-based film, which should be formed by an in situ polymerization on the hydrogel surface initiated upon contact with water. A series of PACA-hydrogel hybrid systems with increasing PACA side chain hydrophobicity was prepared using physically crosslinked alginate films and hydrophilic diclofenac sodium as model hydrogel/drug system. Successful synthesis of PACA at the hydrogel surface was confirmed and the PACA layer was identified to be most homogeneous for poly(n-butyl-2-cyanoacrylate) on both the micro- and nanolevel. At the same time, the diclofenac release from the hybrid systems was substantially sustained from ~1day for unmodified hydrogels up to >14days depending on the type of PACA employed as diffusion barrier. Overall, in situ polymerized PACA films on hydrogels may be widely applicable to various hydrogel matrices, different matrix sizes as well as more complex shaped hydrogel carriers.
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Synthesis and Characterization of Oligo(Ethylene Glycol)s Functionalized with Desaminotyrosine or Desaminotyrosyltyrosine. J Appl Biomater Funct Mater 2012; 10:170-6. [DOI: 10.5301/jabfm.2012.10342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2012] [Indexed: 11/20/2022] Open
Abstract
Purpose The aromatic compounds desaminotyrosine (DAT) and desaminotyrosyltyrosine (DATT) have been successfully used to functionalize gelatin in order to form physically crosslinked networks via p-p interactions and hydrogen bonds of the introduced phenol moieties. Here, it was explored whether this concept can be applied to a synthetic polymer not engaging in additional interactions such as triple helix formation in gelatin, enabling a network to form by physical interactions mainly related to the terminal functional groups. Oligo(ethylene glycol) (OEG) was chosen as hydrophilic synthetic polymer for the backbone structure. Methods Linear OEG (MP = 3 kDa) and four-arm OEG (Mn = 5 kDa) with amino functionalities as endgroups were functionalized with DAT and DATT using EDC·HCl and NHS as activating agents. The compounds were characterized by NMR, IR spectroscopy, and MALDI. Rheological behavior of aqueous solutions of the polymers was studied. The critical micelle concentration (CMC) was determined by a fluorescence spectroscopic analysis using the hydrophobic fluorescent dye pyrene. Results DATT-functionalized linear OEG, four-arm DAT-functionalized OEG and four-arm DATT-functionalized OEG were synthesized with degrees of functionalization of 60–95 mol%. All compounds were water soluble, and rheological measurements revealed a decrease in storage modulus G′ and loss modulus G″ compared to unfunctionalized OEG. Moreover, the CMC of linear OEG-DATT could be determined. Conclusions The syntheses of OEG functionalized with the aromatic compounds DAT and DATT was reported. The polymers showed the properties of a surfactant.
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Pierce BF, Pittermann E, Ma N, Gebauer T, Neffe AT, Hölscher M, Jung F, Lendlein A. Viability of Human Mesenchymal Stem Cells Seeded on Crosslinked Entropy-Elastic Gelatin-Based Hydrogels. Macromol Biosci 2012; 12:312-21. [DOI: 10.1002/mabi.201100237] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 09/01/2011] [Indexed: 12/21/2022]
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18
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Piluso S, Weigel T, Lendlein A, Neffe AT. Synthesis and Characterization of Gelatin Fragments Obtained by Controlled Degradation. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.201100054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Roch T, Pierce BF, Zaupa A, Jung F, Neffe AT, Lendlein A. Reducing the Endotoxin Burden of Desaminotyrosine- and Desaminotyrosyl Tyrosine-Functionalized Gelatin. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.201100048] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Lange M, Luetzow K, Neffe AT, Lendlein A. Synthesis and Characterization of Polyetherimides with 3-Methoxy-1,2-propanediol Moieties. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.201100052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Pierce BF, Tronci G, Rößle M, Neffe AT, Jung F, Lendlein A. Photocrosslinked Co-Networks from Glycidylmethacrylated Gelatin and Poly(ethylene glycol) Methacrylates. Macromol Biosci 2011; 12:484-93. [DOI: 10.1002/mabi.201100232] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 09/20/2011] [Indexed: 12/12/2022]
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22
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Why Are So Few Degradable Polymeric Biomaterials Currently Established in Clinical Applications? Int J Artif Organs 2011; 34:71-5. [DOI: 10.5301/ijao.2011.6422] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2011] [Indexed: 11/20/2022]
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23
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Neffe AT, Loebus A, Zaupa A, Stoetzel C, Müller FA, Lendlein A. Gelatin functionalization with tyrosine derived moieties to increase the interaction with hydroxyapatite fillers. Acta Biomater 2011; 7:1693-701. [PMID: 21109029 DOI: 10.1016/j.actbio.2010.11.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 11/17/2010] [Accepted: 11/18/2010] [Indexed: 10/18/2022]
Abstract
Combining gelatins functionalized with the tyrosine-derived groups desaminotyrosine or desaminotyrosyl tyrosine with hydroxyapatite (HAp) led to the formation of composite materials with much lower swelling ratios than those of the pure matrices. Shifts of the infra-red (IR) bands related to the free carboxyl groups could be observed in the presence of HAp, which suggested a direct interaction of matrix and filler that formed additional physical cross-links in the material. In tensile tests and rheological measurements the composites equilibrated in water had increased Young's moduli (from 200 kPa up to 2 MPa) and tensile strengths (from 57 kPa up to 1.1 MPa) compared with the matrix polymers without affecting the elongation at break. Furthermore, an increased thermal stability of the networks from 40 to 85°C could be demonstrated. The differences in the behaviour of the functionalized gelatins compared with pure gelatin as a matrix suggested an additional stabilizing bond between the incorporated aromatic groups and the HAp as supported by the IR results. The composites can potentially be applied as bone fillers.
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Demonstrating the Influence of Water on Shape-Memory Polymer Networks Based on Poly[(Rac-Lactide)-Co-Glycolide] Segments in Vitro. Int J Artif Organs 2011; 34:172-9. [DOI: 10.5301/ijao.2011.6413] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2010] [Indexed: 11/20/2022]
Abstract
Thermally-responsive shape-memory polymers (SMP) are highly promising implant materials for applications in minimally-invasive surgery since the shape-memory effect (SME) enables the implantation of a bulky device in a compressed temporary state through a small incision. When heated to a temperature exceeding the material switching temperature (Tsw), the device recovers its original bulky shape. Therefore, SMP implants with Tsw ~ 37°C are required for such applications because the body cannot withstand excessive applications of heat. Here, Tsw of networks based on poly[(rac-lactide)-co-glycolide] star-shaped macrotriol or macrotetrols with 19–22 wt% glycolide content, varying oligomer molecular weight (Mn=3000–10000 g·mol−1), and netpoint functionality (f=3 or 4) were lowered from 55–66°C to below body temperature via the uptake of water, which also induced SME at body temperature. Programmed samples kept their temporary shape at room temperature in water as well as at 37°C under dry conditions but recovered in 37°C water. Water uptake/swelling studies and FTIR analysis indicated that the mechanism of solvent-induced SME involved the plasticization of water in switching domains as opposed to changes in swelling or hydrogen bonding. This indirect actuation of SME by using a combination of solvent and heat could be exploited in easy-to-handle shape-memory implant with slower degradation kinetics.
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Zaupa A, Neffe AT, Pierce BF, Nöchel U, Lendlein A. Influence of tyrosine-derived moieties and drying conditions on the formation of helices in gelatin. Biomacromolecules 2010; 12:75-81. [PMID: 21141880 DOI: 10.1021/bm101029k] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The single and triple helical organization of protein chains strongly influences the mechanical properties of gelatin-based materials. A chemical method for obtaining different degrees of helical organization in gelatin is covalent functionalization, while a physical method for achieving the same goal is the variation of the drying conditions of gelatin solutions. Here we explored how the introduction of desaminotyrosine (DAT) and desaminotyrosyl tyrosine (DATT) linked to lysine residues of gelatin influenced the kinetics and thermodynamic equilibrium of the helicalization process of single and triple helices following different drying conditions. Drying at a temperature above the helix-to-coil transition temperature of gelatin (T > T(c), called v(short)) generally resulted in gelatins with relatively lower triple helical content (X(c,t) = 1-2%) than lower temperature drying (T < T(c), called v(long)) (X(c,t) = 8-10%), where the DAT(T) functional groups generally disrupted helix formation. While different helical contents affected the thermal transition temperatures only slightly, the mechanical properties were strongly affected for swollen hydrogels (E = 4-13 kPa for samples treated by v(long) and E = 120-700 kPa for samples treated by v(short)). This study shows that side group functionalization and different drying conditions are viable options to control the helicalization and macroscopic properties of gelatin-based materials.
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Affiliation(s)
- Alessandro Zaupa
- Center for Biomaterial Development and Berlin-Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstrasse 55, 14513 Teltow, Germany
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A Molecular Dynamic Analysis of Gelatin as an Amorphous Material: Prediction of Mechanical Properties of Gelatin Systems. Int J Artif Organs 2010; 34:139-51. [DOI: 10.5301/ijao.2010.6083] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2010] [Indexed: 11/20/2022]
Abstract
Biomaterials are used in regenerative medicine for induced autoregeneration and tissue engineering. This is often challenging, however, due to difficulties in tailoring and controlling the respective material properties. Since functionalization is expected to offer better control, in this study gelatin chains were modified with physically interacting groups based on tyrosine with the aim of causing the formation of physical crosslinks. This method permits application-specific properties like swelling and better tailoring of mechanical properties. The design of the crosslink strategy was supported by molecular dynamic (MD) simulations of amorphous bulk models for gelatin and functionalized gelatins at different water contents (0.8 and 25 wt.-%). The results permitted predictions to be formulated about the expected crosslink density and its influence on equilibrium swelling behavior and on elastic material properties. The models of pure gelatin were used to validate the strategy by comparison between simulated and experimental data such as density, backbone conformation angle distribution, and X-ray scattering spectra. A key result of the simulations was the prediction that increasing the number of aromatic functions attached to the gelatin chain leads to an increase in the number of physical netpoints observed in the simulated bulk packing models. By comparison with the Flory-Rehner model, this suggested reduced equilibrium swelling of the functionalized materials in water, a prediction that was subsequently confirmed by our experimental work. The reduction and control of the equilibrium degree of swelling in water is a key criterion for the applicability of functionalized gelatins when used, for example, as matrices for induced autoregeneration of tissues.
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