201
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Lin MH, Anderson J, Pinnaratip R, Meng H, Konst S, DeRouin AJ, Rajachar R, Ong KG, Lee BP. Monitoring the Long-Term Degradation Behavior of Biomimetic Bioadhesive Using Wireless Magnetoelastic Sensor. IEEE Trans Biomed Eng 2016; 62:1838-42. [PMID: 26087077 DOI: 10.1109/tbme.2015.2405251] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The degradation behavior of a tissue adhesive is critical to its ability to repair a wound while minimizing prolonged inflammatory response. Traditional degradation tests can be expensive to perform, as they require large numbers of samples. The potential for using magnetoelastic resonant sensors to track bioadhesive degradation behavior was investigated. Specifically, biomimetic poly (ethylene glycol)- (PEG-) based adhesive was coated onto magnetoelastic (ME) sensor strips. Adhesive-coated samples were submerged in solutions buffered at multiple pH levels (5.7, 7.4 and 10.0) at body temperature (37 °C) and the degradation behavior of the adhesive was tracked wirelessly by monitoring the changes in the resonant amplitude of the sensors for over 80 days. Adhesive incubated at pH 7.4 degraded over 75 days, which matched previously published data for bulk degradation behavior of the adhesive while utilizing significantly less material (∼10(3) times lower). Adhesive incubated at pH 10.0 degraded within 25 days while samples incubated at pH 5.7 did not completely degrade even after 80 days of incubation. As expected, the rate of degradation increased with increasing pH as the rate of ester bond hydrolysis is higher under basic conditions. As a result of requiring a significantly lower amount of samples compared to traditional methods, the ME sensing technology is highly attractive for fully characterizing the degradation behavior of tissue adhesives in a wide range of physiological conditions.
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202
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Balcioglu S, Parlakpinar H, Vardi N, Denkbas EB, Karaaslan MG, Gulgen S, Taslidere E, Koytepe S, Ates B. Design of Xylose-Based Semisynthetic Polyurethane Tissue Adhesives with Enhanced Bioactivity Properties. ACS APPLIED MATERIALS & INTERFACES 2016; 8:4456-4466. [PMID: 26824739 DOI: 10.1021/acsami.5b12279] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Developing biocompatible tissue adhesives with high adhesion properties is a highly desired goal of the tissue engineering due to adverse effects of the sutures. Therefore, our work involves synthesis, characterization, adhesion properties, protein adsorption, in vitro biodegradation, in vitro and in vivo biocompatibility properties of xylose-based semisynthetic polyurethane (NPU-PEG-X) bioadhesives. Xylose-based semisynthetic polyurethanes were developed by the reaction among 4,4'-methylenebis(cyclohexyl isocyanate) (MCI), xylose and polyethylene glycol 200 (PEG). Synthesized polyurethanes (PUs) showed good thermal stability and high adhesion strength. The highest values in adhesion strength were measured as 415.0 ± 48.8 and 94.0 ± 2.8 kPa for aluminum substrate and muscle tissue in 15% xylose containing PUs (NPU-PEG-X-15%), respectively. The biodegradation of NPU-PEG-X-15% was also determined as 19.96 ± 1.04% after 8 weeks of incubation. Relative cell viability of xylose containing PU was above 86%. Moreover, 10% xylose containing NPU-PEG-X (NPU-PEG-X-10%) sample has favorable tissue response, and inflammatory reaction between 1 and 6 weeks implantation period. With high adhesiveness and biocompatibility properties, NPU-PEG-X can be used in the medical field as supporting materials for preventing the fluid leakage after abdominal surgery or wound closure.
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Affiliation(s)
- Sevgi Balcioglu
- Department of Chemistry, Faculty of Science, Inonu University , Malatya 44280, Turkey
| | - Hakan Parlakpinar
- Department of Pharmacology, Faculty of Medicine, Inonu University , Malatya 44280, Turkey
| | - Nigar Vardi
- Department of Histology-Embryology, Faculty of Medicine, Inonu University , Malatya 44280, Turkey
| | - Emir Baki Denkbas
- Department of Chemistry, Faculty of Science, Hacettepe University , Ankara 06800, Turkey
| | | | - Selam Gulgen
- Department of Chemistry, Faculty of Science, Inonu University , Malatya 44280, Turkey
| | - Elif Taslidere
- Department of Histology-Embryology, Faculty of Medicine, Inonu University , Malatya 44280, Turkey
| | - Suleyman Koytepe
- Department of Chemistry, Faculty of Science, Inonu University , Malatya 44280, Turkey
| | - Burhan Ates
- Department of Chemistry, Faculty of Science, Inonu University , Malatya 44280, Turkey
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203
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Brennan MJ, Meredith HJ, Jenkins CL, Wilker JJ, Liu JC. Cytocompatibility studies of a biomimetic copolymer with simplified structure and high-strength adhesion. J Biomed Mater Res A 2016; 104:983-90. [PMID: 26714824 DOI: 10.1002/jbm.a.35633] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 11/12/2015] [Accepted: 12/18/2015] [Indexed: 01/04/2023]
Affiliation(s)
- M. Jane Brennan
- School of Chemical Engineering; Purdue University; West Lafayette Indiana 47907
| | - Heather J. Meredith
- School of Materials Engineering; Purdue University; West Lafayette Indiana 47907
| | | | - Jonathan J. Wilker
- School of Materials Engineering; Purdue University; West Lafayette Indiana 47907
- Department of Chemistry; Purdue University; West Lafayette Indiana 47907
| | - Julie C. Liu
- School of Chemical Engineering; Purdue University; West Lafayette Indiana 47907
- Weldon School of Biomedical Engineering; Purdue University; West Lafayette Indiana 47907
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204
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Nanocomposites composed of poly(ɛ-caprolactone) and oligocaprolactone-modified imogolite utilizing biomimetic chelating method. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-015-0912-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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205
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Wang Q, Wang Q, Teng W. Injectable, degradable, electroactive nanocomposite hydrogels containing conductive polymer nanoparticles for biomedical applications. Int J Nanomedicine 2016; 11:131-44. [PMID: 26792990 PMCID: PMC4708196 DOI: 10.2147/ijn.s94777] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Injectable electroactive hydrogels (eGels) are promising in regenerative medicine and drug delivery, however, it is still a challenge to obtain such hydrogels simultaneously possessing other properties including uniform structure, degradability, robustness, and biocompatibility. An emerging strategy to endow hydrogels with desirable properties is to incorporate functional nanoparticles in their network. Herein, we report the synthesis and characterization of an injectable hydrogel based on oxidized alginate (OA) crosslinking gelatin reinforced by electroactive tetraaniline-graft-OA nanoparticles (nEOAs), where nEOAs are expected to impart electroactivity besides reinforcement without significantly degrading the other properties of hydrogels. Assays of transmission electron microscopy, (1)H nuclear magnetic resonance, and dynamic light scattering reveal that EOA can spontaneously and quickly self-assemble into robust nanoparticles in water, and this nanoparticle structure can be kept at pH 3~9. Measurement of the gel time by rheometer and the stir bar method confirms the formation of the eGels, and their gel time is dependent on the weight content of nEOAs. As expected, adding nEOAs to hydrogels does not cause the phase separation (scanning electron microscopy observation), but it improves mechanical strength up to ~8 kPa and conductivity up to ~10(-6) S/cm in our studied range. Incubating eGels in phosphate-buffered saline leads to their further swelling with an increase of water content <6% and gradual degradation. When growing mesenchymal stem cells on eGels with nEOA content ≤14%, the growth curves and morphology of cells were found to be similar to that on tissue culture plastic; when implanting these eGels on a chick chorioallantoic membrane for 1 week, mild inflammation response appeared without any other structural changes, indicating their good in vitro and in vivo biocompatibility. With injectability, uniformity, degradability, electroactivity, relative robustness, and biocompatibility, these eGels may have a huge potential as scaffolds for tissue regeneration and matrix for stimuli responsive drug release.
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Affiliation(s)
- Qinmei Wang
- Laboratory of Biomaterials, Key Laboratory on Assisted Circulation, Ministry of Health, Cardiovascular Division, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, People’s Republic of China
| | - Qiong Wang
- Department of Prosthodontics, Hospital of Stomatology, Institute of Stomatological Research, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, People’s Republic of China
| | - Wei Teng
- Department of Prosthodontics, Hospital of Stomatology, Institute of Stomatological Research, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, People’s Republic of China
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206
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Zhang J, Tao X, Liu J, Wei D, Ren Y. Fe3+-induced bioinspired chitosan hydrogels for the sustained and controlled release of doxorubicin. RSC Adv 2016. [DOI: 10.1039/c6ra07369g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel Fe3+-induced mussel-inspired CCS–NACCS hydrogel was developed for the sustained and controlled release of doxorubicin (DOX).
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Affiliation(s)
- Jinmao Zhang
- State Key Laboratory of Bioreactor Engineering
- New World Institute of Biotechnology
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xinyi Tao
- State Key Laboratory of Bioreactor Engineering
- New World Institute of Biotechnology
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Jianwen Liu
- School of Pharmacy of East China University of Science and Technology
- Shanghai 200237
- China
| | - Dongzhi Wei
- State Key Laboratory of Bioreactor Engineering
- New World Institute of Biotechnology
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yuhong Ren
- State Key Laboratory of Bioreactor Engineering
- New World Institute of Biotechnology
- East China University of Science and Technology
- Shanghai 200237
- China
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207
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Wei Q, Xu W, Liu M, Wu Q, Cheng L, Wang Q. Viscosity-controlled printing of supramolecular-polymeric hydrogels via dual-enzyme catalysis. J Mater Chem B 2016; 4:6302-6306. [PMID: 32263531 DOI: 10.1039/c6tb01792d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Hybrid hydrogels based on a guanidinium-containing oligopeptide are prepared via dual-enzyme-triggered reactions. An extended time window is available for in situ viscosity-controlled 3D printing.
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Affiliation(s)
- Qingcong Wei
- Department of Chemistry
- and Advanced Research Institute
- Tongji University
- Shanghai 200092
- China
| | - Wei Xu
- Spine Division of Orthopaedics Department
- Tongji Hospital
- Tongji University School of Medicine
- Shanghai 200065
- China
| | - Mingyu Liu
- School of Life Sciences and Technology
- Tongji University
- Shanghai 200092
- P. R. China
| | - Qing Wu
- Department of Chemistry
- and Advanced Research Institute
- Tongji University
- Shanghai 200092
- China
| | - Liming Cheng
- Spine Division of Orthopaedics Department
- Tongji Hospital
- Tongji University School of Medicine
- Shanghai 200065
- China
| | - Qigang Wang
- Department of Chemistry
- and Advanced Research Institute
- Tongji University
- Shanghai 200092
- China
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208
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Jia YG, Zhu XX. Nanocomposite hydrogels of LAPONITE® mixed with polymers bearing dopamine and cholic acid pendants. RSC Adv 2016. [DOI: 10.1039/c5ra26316f] [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 nanocomposite hydrogel system was formulated by mixing LAPONITE® with polymers bearing dopamine and cholic acid pendants.
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Affiliation(s)
- Yong-Guang Jia
- Département de Chimie
- Université de Montréal
- Montréal
- Canada
| | - X. X. Zhu
- Département de Chimie
- Université de Montréal
- Montréal
- Canada
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209
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Zhao F, Yao D, Guo R, Deng L, Dong A, Zhang J. Composites of Polymer Hydrogels and Nanoparticulate Systems for Biomedical and Pharmaceutical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2015; 5:2054-2130. [PMID: 28347111 PMCID: PMC5304774 DOI: 10.3390/nano5042054] [Citation(s) in RCA: 198] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 11/18/2015] [Accepted: 11/20/2015] [Indexed: 12/25/2022]
Abstract
Due to their unique structures and properties, three-dimensional hydrogels and nanostructured particles have been widely studied and shown a very high potential for medical, therapeutic and diagnostic applications. However, hydrogels and nanoparticulate systems have respective disadvantages that limit their widespread applications. Recently, the incorporation of nanostructured fillers into hydrogels has been developed as an innovative means for the creation of novel materials with diverse functionality in order to meet new challenges. In this review, the fundamentals of hydrogels and nanoparticles (NPs) were briefly discussed, and then we comprehensively summarized recent advances in the design, synthesis, functionalization and application of nanocomposite hydrogels with enhanced mechanical, biological and physicochemical properties. Moreover, the current challenges and future opportunities for the use of these promising materials in the biomedical sector, especially the nanocomposite hydrogels produced from hydrogels and polymeric NPs, are discussed.
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Affiliation(s)
- Fuli Zhao
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Dan Yao
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Ruiwei Guo
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Liandong Deng
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Anjie Dong
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Jianhua Zhang
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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210
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Shi Y, Zhou P, Jérôme V, Freitag R, Agarwal S. Enzymatically Degradable Polyester-Based Adhesives. ACS Biomater Sci Eng 2015; 1:971-977. [DOI: 10.1021/acsbiomaterials.5b00217] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yinfeng Shi
- Macromolecular
Chemistry II and Bayreuth Center for Colloids and
Interfaces, and ‡Chair for Process Biotechnology, Universität Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | - Peiran Zhou
- Macromolecular
Chemistry II and Bayreuth Center for Colloids and
Interfaces, and ‡Chair for Process Biotechnology, Universität Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | - Valérie Jérôme
- Macromolecular
Chemistry II and Bayreuth Center for Colloids and
Interfaces, and ‡Chair for Process Biotechnology, Universität Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | - Ruth Freitag
- Macromolecular
Chemistry II and Bayreuth Center for Colloids and
Interfaces, and ‡Chair for Process Biotechnology, Universität Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | - Seema Agarwal
- Macromolecular
Chemistry II and Bayreuth Center for Colloids and
Interfaces, and ‡Chair for Process Biotechnology, Universität Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
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211
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Peak CW, Carrow JK, Thakur A, Singh A, Gaharwar AK. Elastomeric Cell-Laden Nanocomposite Microfibers for Engineering Complex Tissues. Cell Mol Bioeng 2015. [DOI: 10.1007/s12195-015-0406-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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212
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Ding X, Vegesna GK, Meng H, Lee BP. Nitro-Group Functionalization of Dopamine and its Contribution to the Viscoelastic Properties of Catechol-Containing Nanocomposite Hydrogels. MACROMOL CHEM PHYS 2015; 216:1109-1119. [PMID: 26929588 PMCID: PMC4768752 DOI: 10.1002/macp.201500010] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Linear polyacrylamide (PAAm) is modified with dopamine or nitrodopamine (PAAm-D and PAAm-ND, respectively) to evaluate the effect of nitro-group modification on the interfacial binding properties of polymer-bound catechol. Nanocomposite hydrogels are prepared by mixing PAAm-based polymers with Laponite and the viscoelastic properties of these materials are determined using oscillatory rheometry. The incorporation of a small amount of catechol (≈0.1 wt% in swollen hydrogel) drastically increases the shear moduli by 1-2 orders of magnitude over those of the catechol-free control. Additionally, PAAm-ND exhibits higher shear moduli values than PAAm-D across the whole pH range tested (pH 3.0-9.0). Based on the calculated effective crosslinking density, effective functionality, and molecular weight between crosslinks, nitro-group functionalization of dopamine results in a polymer network with increased crosslinking density and crosslinking points with higher functionality. Nitro-functionalization enhances the interfacial binding property of dopamine and increases its resistant to oxidation, which results in nanocomposite hydrogels with enhanced stiffness and a viscous dissipation property.
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Affiliation(s)
- Xiaochu Ding
- Department of Biomedical Engineering, Michigan Technological University, Houghton, MI 49931, USA
| | - Giri K. Vegesna
- Department of Biomedical Engineering, Michigan Technological University, Houghton, MI 49931, USA
| | - Hao Meng
- Department of Biomedical Engineering, Michigan Technological University, Houghton, MI 49931, USA
| | - Bruce P. Lee
- Department of Biomedical Engineering, Michigan Technological University, Houghton, MI 49931, USA
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213
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Meng H, Li Y, Faust M, Konst S, Lee BP. Hydrogen peroxide generation and biocompatibility of hydrogel-bound mussel adhesive moiety. Acta Biomater 2015; 17:160-9. [PMID: 25676582 DOI: 10.1016/j.actbio.2015.02.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 01/18/2015] [Accepted: 02/03/2015] [Indexed: 02/07/2023]
Abstract
To decouple the extracellular oxidative toxicity of catechol adhesive moiety from its intracellular non-oxidative toxicity, dopamine was chemically bound to a non-degradable polyacrylamide hydrogel through photo-initiated polymerization of dopamine methacrylamide (DMA) with acrylamide monomers. Network-bound dopamine released cytotoxic levels of H2O2 when its catechol side chain oxidized to quinone. Introduction of catalase at a concentration as low as 7.5 U/mL counteracted the cytotoxic effect of H2O2 and enhanced the viability and proliferation rate of fibroblasts. These results indicated that H2O2 generation is one of the main contributors to the cytotoxicity of dopamine in culture. Additionally, catalase is a potentially useful supplement to suppress the elevated oxidative stress found in typical culture conditions and can more accurately evaluate the biocompatibility of mussel-mimetic biomaterials. The release of H2O2 also induced a higher foreign body reaction to catechol-modified hydrogel when it was implanted subcutaneously in rat. Given that H2O2 has a multitude of biological effects, both beneficiary and deleterious, regulation of H2O2 production from catechol-containing biomaterials is necessary to optimize the performance of these materials for a desired application.
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214
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Thoniyot P, Tan MJ, Karim AA, Young DJ, Loh XJ. Nanoparticle-Hydrogel Composites: Concept, Design, and Applications of These Promising, Multi-Functional Materials. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2015; 2:1400010. [PMID: 27980900 PMCID: PMC5115280 DOI: 10.1002/advs.201400010] [Citation(s) in RCA: 424] [Impact Index Per Article: 47.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Indexed: 05/19/2023]
Abstract
New technologies rely on the development of new materials, and these may simply be the innovative combination of known components. The structural combination of a polymer hydrogel network with a nanoparticle (metals, non-metals, metal oxides, and polymeric moieties) holds the promise of providing superior functionality to the composite material with applications in diverse fields, including catalysis, electronics, bio-sensing, drug delivery, nano-medicine, and environmental remediation. This mixing may result in a synergistic property enhancement of each component: for example, the mechanical strength of the hydrogel and concomitantly decrease aggregation of the nanoparticles. These mutual benefits and the associated potential applications have seen a surge of interest in the past decade from multi-disciplinary research groups. Recent advances in nanoparticle-hydrogel composites are herein reviewed with a focus on their synthesis, design, potential applications, and the inherent challenges accompanying these exciting materials.
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Affiliation(s)
- Praveen Thoniyot
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore
| | - Mein Jin Tan
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore
| | - Anis Abdul Karim
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore
| | - David James Young
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore; School of Science Monash University Malaysia Bandar Sunway 47500 Malaysia
| | - Xian Jun Loh
- Institute of Materials Research and Engineering 3 Research Link Singapore 117602 Singapore; Department of Materials Science and Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117576 Singapore
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215
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Cencer M, Murley M, Liu Y, Lee BP. Effect of Nitro-Functionalization on the Cross-Linking and Bioadhesion of Biomimetic Adhesive Moiety. Biomacromolecules 2014; 16:404-10. [PMID: 25495043 PMCID: PMC4294588 DOI: 10.1021/bm5016333] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
![]()
Dopamine
mimics the exceptional moisture-resistant adhesive properties
of the amino acid, DOPA, found in adhesive proteins secreted by marine
mussels. The catechol side chain of dopamine was functionalized with
a nitro-group, and the effect of the electron withdrawing group modification
on the cross-linking chemistry and bioadhesive properties of the adhesive
moiety was evaluated. Both nitrodopamine and dopamine were covalently
attached as a terminal group onto an inert, 4-armed poly(ethylene
glygol) (PEG-ND and PEG-D, respectively). PEG-ND and PEG-D exhibited
different dependence on the concentration of NaIO4 and
pH, which affected the curing rate, mechanical properties, and adhesive
performance of these biomimetic adhesives differently. PEG-ND cured
instantly and its bioadhesive properties were minimally affected by
the change in pH (5.7–8) within the physiological range. Under
mildly acidic conditions (pH 5.7 and 6.7), PEG-ND outperformed PEG-D
in lap shear adhesion testing using wetted pericardium tissues. However,
nitrodopamine only formed dimers, which resulted in the formation
of loosely cross-linked network and adhesive with reduced cohesive
properties. UV–vis spectroscopy further confirmed nitrodopamine’s
ability for rapid dimer formation. The ability for nitrodopamine to
rapidly cure and adhere to biological substrates in an acidic pH make
it suitable for designing adhesive biomaterials targeted at tissues
that are more acidic (i.e., subcutaneous, dysoxic, or tumor tissues).
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Affiliation(s)
- Morgan Cencer
- Departments of †Chemistry and ‡Biomedical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Meridith Murley
- Departments of †Chemistry and ‡Biomedical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Yuan Liu
- Departments of †Chemistry and ‡Biomedical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
| | - Bruce P. Lee
- Departments of †Chemistry and ‡Biomedical Engineering, Michigan Technological University, Houghton, Michigan 49931, United States
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