101
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Wang X, Guo J, Zhang Q, Zhu S, Liu L, Jiang X, Wei DH, Liu RS, Li L. Gelatin sponge functionalized with gold/silver clusters for antibacterial application. NANOTECHNOLOGY 2020; 31:134004. [PMID: 31751976 DOI: 10.1088/1361-6528/ab59eb] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Pathogenic bacterial infection, especially in the wound, may threaten human health. Developing new antibacterial materials for wound healing is still urgent. Metal nanoclusters have been explored as a novel antibacterial agent. Herein, biomolecule gelatin was chosen as a substrate and functionalized with gold/silver clusters for bacterial killing. Through a simple amidation reaction, gold/silver clusters were successfully conjugated in a gelatin substrate to obtain a Au/Ag@gelatin sponge. The presence of gold/silver clusters modified the porous structure of the gelatin. Thus, the water absorption and water retention of the Au/Ag@gelatin sponge were enhanced. More importantly, the gold/silver clusters show aggregation-enhanced emission and strong reactive oxygen generation, that endow the Au/Ag@gelatin sponge with a good antibacterial property. The good physical performance and favorable bactericidal activity of the Au/Ag@gelatin sponge suggest its potential for application as a wound dressing.
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Affiliation(s)
- Xiaoyu Wang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083
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102
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Compaan AM, Song K, Chai W, Huang Y. Cross-Linkable Microgel Composite Matrix Bath for Embedded Bioprinting of Perfusable Tissue Constructs and Sculpting of Solid Objects. ACS APPLIED MATERIALS & INTERFACES 2020; 12:7855-7868. [PMID: 31948226 DOI: 10.1021/acsami.9b15451] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Tissue engineering is a rapidly growing field, which requires advanced fabrication technologies to generate cell-laden tissue analogues with a wide range of internal and external physical features including perfusable channels, cavities, custom shapes, and spatially varying material and/or cell compositions. A versatile embedded printing methodology is proposed in this work for creating custom biomedical acellular and cell-laden hydrogel constructs by utilizing a biocompatible microgel composite matrix bath. A sacrificial material is patterned within a biocompatible hydrogel precursor matrix bath using extrusion printing to create three-dimensional features; after printing, the matrix bath is cross-linked, and the sacrificial material is flushed away to create perfusable channels within the bulk composite hydrogel matrix. The composite matrix bath material consists of jammed cross-linked hydrogel microparticles (microgels) to control rheology during fabrication along with a fluid hydrogel precursor, which is cross-linked after fabrication to form the continuous phase of the composite hydrogel. For demonstration, gellan or enzymatically cross-linked gelatin microgels are utilized with a continuous gelatin hydrogel precursor solution to make the composite matrix bath herein; the composite hydrogel matrix is formed by cross-linking the continuous gelatin phase enzymatically after printing. A variety of features including discrete channels, junctions, networks, and external contours are fabricated in the proposed composite matrix bath using embedded printing. Cell-laden constructs with printed features are also evaluated; the microgel composite hydrogel matrices support cell activity, and printed channels enhance proliferation compared to solid constructs even in static culture. The proposed method can be expanded as a solid object sculpting method to sculpt external contours by printing a shell of sacrificial ink and further discarding excess composite hydrogel matrix after printing and cross-linking. While aqueous alginate solution is used as a sacrificial ink, more advanced sacrificial materials can be utilized for better printing resolution.
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Affiliation(s)
- Ashley M Compaan
- Department of Materials Science and Engineering , University of Florida , Gainesville , Florida 32611 , United States
- Novabone Products, LLC , 13510 NW US Highway 441 , Alachua , Florida 32615 , United States
| | - Kaidong Song
- Department of Mechanical and Aerospace Engineering , University of Florida , Gainesville , Florida 32611 , United States
| | - Wenxuan Chai
- Department of Mechanical and Aerospace Engineering , University of Florida , Gainesville , Florida 32611 , United States
| | - Yong Huang
- Department of Materials Science and Engineering , University of Florida , Gainesville , Florida 32611 , United States
- Department of Mechanical and Aerospace Engineering , University of Florida , Gainesville , Florida 32611 , United States
- Department of Biomedical Engineering , University of Florida , Gainesville , Florida 32611 , United States
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103
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Bello AB, Kim D, Kim D, Park H, Lee SH. Engineering and Functionalization of Gelatin Biomaterials: From Cell Culture to Medical Applications. TISSUE ENGINEERING PART B-REVIEWS 2020; 26:164-180. [PMID: 31910095 DOI: 10.1089/ten.teb.2019.0256] [Citation(s) in RCA: 250] [Impact Index Per Article: 62.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Health care and medicine were revolutionized in recent years by the development of biomaterials, such as stents, implants, personalized drug delivery systems, engineered grafts, cell sheets, and other transplantable materials. These materials not only support the growth of cells before transplantation but also serve as replacements for damaged tissues in vivo. Among the various biomaterials available, those made from natural biological sources such as extracellular proteins (collagen, fibronectin, laminin) have shown significant benefits, and thus are widely used. However, routine biomaterial-based research requires copious quantities of proteins and the use of pure and intact extracellular proteins could be highly cost ineffective. Gelatin is a molecular derivative of collagen obtained through the irreversible denaturation of collagen proteins. Gelatin shares a very close molecular structure and function with collagen and thus is often used in cell and tissue culture to replace collagen for biomaterial purposes. Recent technological advancements such as additive manufacturing, rapid prototyping, and three-dimensional printing, in general, have resulted in great strides toward the generation of functional gelatin-based materials for medical purposes. In this review, the structural and molecular similarities of gelatin to other extracellular matrix proteins are compared and analyzed. Current strategies for gelatin crosslinking and production are described and recent applications of gelatin-based biomaterials in cell culture and tissue regeneration are discussed. Finally, recent improvements in gelatin-based biomaterials for medical applications and future directions are elaborated. Impact statement In this study, we described gelatin's biochemical properties and compared its advantages and drawbacks over other extracellular matrix proteins and polymers used for biomaterial application. We also described how gelatin can be used with other polymers in creating gelatin composite materials that have enhanced mechanical properties, increased biocompatibility, and boosted bioactivity, maximizing its benefits for biomedical purposes. The article is relevant, as it discussed not only the chemistry of gelatin, but also listed the current techniques in gelatin/biomaterial manufacturing and described the most recent trends in gelatin-based biomaterials for biomedical applications.
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Affiliation(s)
- Alvin Bacero Bello
- School of Integrative Engineering, Chung-Ang University, Seoul, Republic of Korea.,Department of Biomedical Science, Dongguk University, Gyeonggi, Republic of Korea
| | - Deogil Kim
- Department of Biomedical Science, CHA University, Seongnam-Si, Republic of Korea
| | - Dohyun Kim
- Department of Biomedical Science, Dongguk University, Gyeonggi, Republic of Korea
| | - Hansoo Park
- School of Integrative Engineering, Chung-Ang University, Seoul, Republic of Korea
| | - Soo-Hong Lee
- Department of Biomedical Science, Dongguk University, Gyeonggi, Republic of Korea
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104
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Mattei G, Cacopardo L, Ahluwalia A. Engineering Gels with Time-Evolving Viscoelasticity. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E438. [PMID: 31963333 PMCID: PMC7014018 DOI: 10.3390/ma13020438] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 02/01/2023]
Abstract
From a mechanical point of view, a native extracellular matrix (ECM) is viscoelastic. It also possesses time-evolving or dynamic behaviour, since pathophysiological processes such as ageing alter their mechanical properties over time. On the other hand, biomaterial research on mechanobiology has focused mainly on the development of substrates with varying stiffness, with a few recent contributions on time- or space-dependent substrate mechanics. This work reports on a new method for engineering dynamic viscoelastic substrates, i.e., substrates in which viscoelastic parameters can change or evolve with time, providing a tool for investigating cell response to the mechanical microenvironment. In particular, a two-step (chemical and enzymatic) crosslinking strategy was implemented to modulate the viscoelastic properties of gelatin hydrogels. First, gels with different glutaraldehyde concentrations were developed to mimic a wide range of soft tissue viscoelastic behaviours. Then their mechanical behaviour was modulated over time using microbial transglutaminase. Typically, enzymatically induced mechanical alterations occurred within the first 24 h of reaction and then the characteristic time constant decreased although the elastic properties were maintained almost constant for up to seven days. Preliminary cell culture tests showed that cells adhered to the gels, and their viability was similar to that of controls. Thus, the strategy proposed in this work is suitable for studying cell response and adaptation to temporal variations of substrate mechanics during culture.
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Affiliation(s)
- Giorgio Mattei
- Department of Information Engineering, University of Pisa, Via Girolamo Caruso 16, 56122 Pisa, Italy;
| | - Ludovica Cacopardo
- Research Centre “E. Piaggio”, University of Pisa, Largo Lucio Lazzarino 1, 56122 Pisa, Italy;
| | - Arti Ahluwalia
- Department of Information Engineering, University of Pisa, Via Girolamo Caruso 16, 56122 Pisa, Italy;
- Research Centre “E. Piaggio”, University of Pisa, Largo Lucio Lazzarino 1, 56122 Pisa, Italy;
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105
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Contessi Negrini N, Celikkin N, Tarsini P, Farè S, Święszkowski W. Three-dimensional printing of chemically crosslinked gelatin hydrogels for adipose tissue engineering. Biofabrication 2020; 12:025001. [DOI: 10.1088/1758-5090/ab56f9] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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106
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Zhao J, He N. A mini-review of embedded 3D printing: supporting media and strategies. J Mater Chem B 2020; 8:10474-10486. [DOI: 10.1039/d0tb01819h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Embedded 3D printing is an additive manufacturing method based on a material extrusion strategy.
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Affiliation(s)
- Jingzhou Zhao
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Jiangsu 210096
- China
| | - Nongyue He
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Jiangsu 210096
- China
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107
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Raju RR, Liebig F, Klemke B, Koetz J. Ultralight magnetic aerogels from Janus emulsions. RSC Adv 2020; 10:7492-7499. [PMID: 35492159 PMCID: PMC9049865 DOI: 10.1039/c9ra10247g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 02/07/2020] [Indexed: 11/21/2022] Open
Abstract
Magnetite containing aerogels were synthesized by freeze-drying olive oil/silicone oil-based Janus emulsion gels containing gelatin and sodium carboxymethylcellulose (NaCMC). The magnetite nanoparticles dispersed in olive oil are processed into the gel and remain in the macroporous aerogel after removing the oil components. The coexistence of macropores from the Janus droplets and mesopores from freeze-drying of the hydrogels in combination with the magnetic properties offer a special hierarchical pore structure, which is of relevance for smart supercapacitors, biosensors, and spilled oil sorption and separation. The morphology of the final structure was investigated in dependence on initial compositions. More hydrophobic aerogels with magnetic responsiveness were synthesized by bisacrylamide-crosslinking of the hydrogel. The crosslinked aerogels can be successfully used in magnetically responsive clean up experiments of the cationic dye methylene blue. Magnetite containing aerogels were synthesized by freeze-drying olive oil/silicone oil-based Janus emulsion gels containing gelatin and sodium carboxymethylcellulose (NaCMC).![]()
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Affiliation(s)
| | - Ferenc Liebig
- Institute of Chemistry
- University of Potsdam
- 14476 Potsdam
- Germany
| | - Bastian Klemke
- Helmholtz-Zentrum Berlin für Materialien und Energie
- 14109 Berlin
- Germany
| | - Joachim Koetz
- Institute of Chemistry
- University of Potsdam
- 14476 Potsdam
- Germany
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108
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Review transglutaminases: part II-industrial applications in food, biotechnology, textiles and leather products. World J Microbiol Biotechnol 2019; 36:11. [PMID: 31879822 DOI: 10.1007/s11274-019-2792-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 12/20/2019] [Indexed: 12/20/2022]
Abstract
Because of their protein cross-linking properties, transglutaminases are widely used in several industrial processes, including the food and pharmaceutical industries. Transglutaminases obtained from animal tissues and organs, the first sources of this enzyme, are being replaced by microbial sources, which are cheaper and easier to produce and purify. Since the discovery of microbial transglutaminase (mTGase), the enzyme has been produced for industrial applications by traditional fermentation process using the bacterium Streptomyces mobaraensis. Several studies have been carried out in this field to increase the enzyme industrial productivity. Researches on gene expression encoding transglutaminase biosynthesis were performed in Streptomyces lividans, Escherichia coli, Corynebacterium glutamicum, Yarrowia lipolytica, and Pichia pastoris. In the first part of this review, we presented an overview of the literature on the origins, types, mediated reactions, and general characterizations of these important enzymes, as well as the studies on recombinant microbial transglutaminases. In this second part, we focus on the application versatility of mTGase in three broad areas: food, pharmacological, and biotechnological industries. The use of mTGase is presented for several food groups, showing possibilities of applications and challenges to further improve the quality of the end-products. Some applications in the textile and leather industries are also reviewed, as well as special applications in the PEGylation reaction, in the production of antibody drug conjugates, and in regenerative medicine.
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109
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Munteanu SB, Vasile C. Vegetable Additives in Food Packaging Polymeric Materials. Polymers (Basel) 2019; 12:E28. [PMID: 31877858 PMCID: PMC7023556 DOI: 10.3390/polym12010028] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 12/19/2019] [Accepted: 12/19/2019] [Indexed: 12/12/2022] Open
Abstract
Plants are the most abundant bioresources, providing valuable materials that can be used as additives in polymeric materials, such as lignocellulosic fibers, nano-cellulose, or lignin, as well as plant extracts containing bioactive phenolic and flavonoid compounds used in the healthcare, pharmaceutical, cosmetic, and nutraceutical industries. The incorporation of additives into polymeric materials improves their properties to make them suitable for multiple applications. Efforts are made to incorporate into the raw polymers various natural biobased and biodegradable additives with a low environmental fingerprint, such as by-products, biomass, plant extracts, etc. In this review we will illustrate in the first part recent examples of lignocellulosic materials, lignin, and nano-cellulose as reinforcements or fillers in various polymer matrices and in the second part various applications of plant extracts as active ingredients in food packaging materials based on polysaccharide matrices (chitosan/starch/alginate).
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Affiliation(s)
| | - Cornelia Vasile
- “P. Poni” Institute of Macromolecular Chemistry, Romanian Academy, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania;
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110
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Entekhabi E, Haghbin Nazarpak M, Sedighi M, Kazemzadeh A. Predicting degradation rate of genipin cross-linked gelatin scaffolds with machine learning. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 107:110362. [PMID: 31761181 DOI: 10.1016/j.msec.2019.110362] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 10/05/2019] [Accepted: 10/22/2019] [Indexed: 10/25/2022]
Abstract
Genipin can improve weak mechanical properties and control high degradation rate of gelatin, as a cross-linker of gelatin which is widely used in tissue engineering. In this study, genipin cross-linked gelatin biodegradable porous scaffolds with different weight percentages of gelatin and genipin were prepared for tissue regeneration and measurement of their various properties including morphological characteristics, mechanical properties, swelling, degree of crosslinking and degradation rate. Results indicated that the sample containing the highest amount of gelatin and genipin had the highest degree of crosslinking and increasing the percentage of genipin from 0.125% to 0.5% enhances ultimate tensile strength (UTS) up to 113% and 92%, for samples with 2.5% and 10% gelatin, respectively. For these samples, increasing the percentage of genipin, reduce their degradation rate significantly with an average value of 124%. Furthermore, experimental data are used to develop a machine learning model, which compares artificial neural networks (ANN) and kernel ridge regression (KRR) to predict degradation rate of genipin-cross-linked gelatin scaffolds as a property of interest. The predicted degradation rate demonstrates that the ANN, with mean squared error (MSE) of 2.68%, outperforms the KRR with MSE = 4.78% in terms of accuracy. These results suggest that machine learning models offer an excellent prediction accuracy to estimate the degradation rate which will significantly help reducing experimental costs needed to carry out scaffold design.
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Affiliation(s)
- Elahe Entekhabi
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | | | - Mehdi Sedighi
- New Technologies Research Center (NTRC), Amirkabir University of Technology, Tehran, Iran; Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
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111
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Chitosan Hydrogels Crosslinked by Genipin and Reinforced with Cellulose Nanocrystals: Production and Characterization. JOURNAL OF COMPOSITES SCIENCE 2019. [DOI: 10.3390/jcs3030084] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
In this work, chitosan hydrogels crosslinked with genipin and reinforced with cellulose nanocrystals (CNC) were developed and characterized with the aim of future biomedical applications. CNC was produced by acid hydrolysis and characterized by atomic force microscopy (AFM). Chitosan/CNC nanocomposite hydrogels were produced with different CNC concentrations (w/w): 0%, 2%, 4%, and 6%. The genipin was used as a crosslinking agent in a genipin/chitosan molar proportion of 1:8. The hydrogels were characterized by porosity measurements, scanning electron microscopy (SEM), swelling test, and mechanical compression test. No significant differences were observed concerning the porosity of the hydrogels; however, a trend of decreasing porosity was observed with increasing CNC content. The SEM images showed a better pore structure as the CNC concentration increased. A decrease in the swelling degree with increasing CNC content in the chitosan/CNC nanocomposite hydrogel was verified in the swelling tests. An increase in the CNC concentration in the chitosan/CNC nanocomposite hydrogel caused a gradual increase in the maximum stress and maximum strain as observed in the compression tests, showing a significant difference between chitosan/CNC 6 wt % and neat chitosan hydrogel.
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112
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Výborný K, Vallová J, Kočí Z, Kekulová K, Jiráková K, Jendelová P, Hodan J, Kubinová Š. Genipin and EDC crosslinking of extracellular matrix hydrogel derived from human umbilical cord for neural tissue repair. Sci Rep 2019; 9:10674. [PMID: 31337821 PMCID: PMC6650505 DOI: 10.1038/s41598-019-47059-x] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 07/03/2019] [Indexed: 12/23/2022] Open
Abstract
Extracellular matrix (ECM) hydrogels, produced by tissue decellularization are natural injectable materials suitable for neural tissue repair. However, the rapid biodegradation of these materials may disrupt neural tissue reconstruction in vivo. The aim of this study was to improve the stability of the previously described ECM hydrogel derived from human umbilical cord using genipin and N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDC), crosslinking at concentration of 0.5-10 mM. The hydrogels, crosslinked by genipin (ECM/G) or EDC (ECM/D), were evaluated in vitro in terms of their mechanical properties, degradation stability and biocompatibility. ECM/G, unlike ECM/D, crosslinked hydrogels revealed improved rheological properties when compared to uncrosslinked ECM. Both ECM/G and ECM/D slowed down the gelation time and increased the resistance against in vitro enzymatic degradation, while genipin crosslinking was more effective than EDC. Crosslinkers concentration of 1 mM enhanced the in vitro bio-stability of both ECM/G and ECM/D without affecting mesenchymal stem cell proliferation, axonal sprouting or neural stem cell growth and differentiation. Moreover, when injected into cortical photochemical lesion, genipin allowed in situ gelation and improved the retention of ECM for up to 2 weeks without any adverse tissue response or enhanced inflammatory reaction. In summary, we demonstrated that genipin, rather than EDC, improved the bio-stability of injectable ECM hydrogel in biocompatible concentration, and that ECM/G has potential as a scaffold for neural tissue application.
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Affiliation(s)
- Karel Výborný
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic.,2nd Medical Faculty, Charles University, Prague, Czech Republic
| | - Jana Vallová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic.,2nd Medical Faculty, Charles University, Prague, Czech Republic
| | - Zuzana Kočí
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Kristýna Kekulová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic.,2nd Medical Faculty, Charles University, Prague, Czech Republic
| | - Klára Jiráková
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Pavla Jendelová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jiří Hodan
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Šárka Kubinová
- Institute of Experimental Medicine of the Czech Academy of Sciences, Prague, Czech Republic.
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113
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Ajdary R, Huan S, Zanjanizadeh Ezazi N, Xiang W, Grande R, Santos HA, Rojas OJ. Acetylated Nanocellulose for Single-Component Bioinks and Cell Proliferation on 3D-Printed Scaffolds. Biomacromolecules 2019; 20:2770-2778. [PMID: 31117356 PMCID: PMC6620719 DOI: 10.1021/acs.biomac.9b00527] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/20/2019] [Indexed: 01/05/2023]
Abstract
Nanocellulose has been demonstrated as a suitable material for cell culturing, given its similarity to extracellular matrices. Taking advantage of the shear thinning behavior, nanocellulose suits three-dimensional (3D) printing into scaffolds that support cell attachment and proliferation. Here, we propose aqueous suspensions of acetylated nanocellulose of a low degree of substitution for direct ink writing (DIW). This benefits from the heterogeneous acetylation of precursor cellulosic fibers, which eases their deconstruction and confers the characteristics required for extrusion in DIW. Accordingly, the morphology of related 3D-printed architectures and their performance during drying and rewetting as well as interactions with living cells are compared with those produced from typical unmodified and TEMPO-oxidized nanocelluloses. We find that a significantly lower concentration of acetylated nanofibrils is needed to obtain bioinks of similar performance, affording more porous structures. Together with their high surface charge and axial aspect, acetylated nanocellulose produces dimensionally stable monolithic scaffolds that support drying and rewetting, required for packaging and sterilization. Considering their potential uses in cardiac devices, we discuss the interactions of the scaffolds with cardiac myoblast cells. Attachment, proliferation, and viability for 21 days are demonstrated. Overall, the performance of acetylated nanocellulose bioinks opens the possibility for reliable and scale-up fabrication of scaffolds appropriate for studies on cellular processes and for tissue engineering.
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Affiliation(s)
- Rubina Ajdary
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI 00076 Aalto, Espoo, Finland
| | - Siqi Huan
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI 00076 Aalto, Espoo, Finland
| | - Nazanin Zanjanizadeh Ezazi
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI 00014 Helsinki, Finland
| | - Wenchao Xiang
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI 00076 Aalto, Espoo, Finland
| | - Rafael Grande
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI 00076 Aalto, Espoo, Finland
| | - Hélder A. Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology,
Faculty of Pharmacy and Helsinki Institute of Life Science (HiLIFE), University of Helsinki, FI 00014 Helsinki, Finland
| | - Orlando J. Rojas
- Department
of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16300, FI 00076 Aalto, Espoo, Finland
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114
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Garcia-Orue I, Santos-Vizcaino E, Etxabide A, Uranga J, Bayat A, Guerrero P, Igartua M, de la Caba K, Hernandez RM. Development of Bioinspired Gelatin and Gelatin/Chitosan Bilayer Hydrofilms for Wound Healing. Pharmaceutics 2019; 11:E314. [PMID: 31277455 PMCID: PMC6680716 DOI: 10.3390/pharmaceutics11070314] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/17/2019] [Accepted: 07/01/2019] [Indexed: 12/22/2022] Open
Abstract
In the current study, we developed a novel gelatin-based bilayer wound dressing. We used different crosslinking agents to confer unique properties to each layer, obtaining a bioinspired multifunctional hydrofilm suitable for wound healing. First, we produced a resistant and non-degradable upper layer by lactose-mediated crosslinking of gelatin, which provided mechanical support and protection to overall design. For the lower layer, we crosslinked gelatin with citric acid, resulting in a porous matrix with a great swelling ability. In addition, we incorporated chitosan into the lower layer to harness its wound healing ability. FTIR and SEM analyses showed that lactose addition changed the secondary structure of gelatin, leading to a more compact and smoother structure than that obtained with citric acid. The hydrofilm was able to swell 384.2 ± 57.2% of its dry weight while maintaining mechanical integrity. Besides, its water vapour transmission rate was in the range of commercial dressings (1381.5 ± 108.6 g/m2·day). In vitro, cytotoxicity assays revealed excellent biocompatibility. Finally, the hydrofilm was analysed through an ex vivo wound healing assay in human skin. It achieved similar results to the control in terms of biocompatibility and wound healing, showing suitable characteristics to be used as a wound dressing.
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Affiliation(s)
- Itxaso Garcia-Orue
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 01006 Vitoria-Gasteiz, Spain
| | - Edorta Santos-Vizcaino
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 01006 Vitoria-Gasteiz, Spain
| | - Alaitz Etxabide
- BIOMAT Research Group, Chemical and Environmental Engineering Department, Engineering College of Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain
| | - Jone Uranga
- BIOMAT Research Group, Chemical and Environmental Engineering Department, Engineering College of Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain
| | - Ardeshir Bayat
- Plastic & Reconstructive Surgery Research, Division of Musculoskeletal & Dermatological Sciences, School of Biological Sciences, University of Manchester, M13 9PL Manchester, UK.
| | - Pedro Guerrero
- BIOMAT Research Group, Chemical and Environmental Engineering Department, Engineering College of Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain
| | - Manoli Igartua
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 01006 Vitoria-Gasteiz, Spain
| | - Koro de la Caba
- BIOMAT Research Group, Chemical and Environmental Engineering Department, Engineering College of Gipuzkoa, University of the Basque Country (UPV/EHU), Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain
| | - Rosa Maria Hernandez
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 01006 Vitoria-Gasteiz, Spain.
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115
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Ranganathan S, Balagangadharan K, Selvamurugan N. Chitosan and gelatin-based electrospun fibers for bone tissue engineering. Int J Biol Macromol 2019; 133:354-364. [DOI: 10.1016/j.ijbiomac.2019.04.115] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/06/2019] [Accepted: 04/16/2019] [Indexed: 12/29/2022]
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116
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Pazarçeviren AE, Evis Z, Keskin D, Tezcaner A. Resorbable PCEC/gelatin-bismuth doped bioglass-graphene oxide bilayer membranes for guided bone regeneration. Biomed Mater 2019; 14:035018. [DOI: 10.1088/1748-605x/ab007b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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117
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Pugliese R, Maleki M, Zuckermann RN, Gelain F. Self-assembling peptides cross-linked with genipin: resilient hydrogels and self-standing electrospun scaffolds for tissue engineering applications. Biomater Sci 2019; 7:76-91. [PMID: 30475373 DOI: 10.1039/c8bm00825f] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Self-assembling peptides (SAPs) are synthetic bioinspired biomaterials that can be feasibly multi-functionalized for applications in surgery, drug delivery, optics and tissue engineering (TE). Despite their promising biocompatibility and biomimetic properties, they have never been considered real competitors of polymers and/or cross-linked extracellular matrix (ECM) natural proteins. Indeed, synthetic SAP-made hydrogels usually feature modest mechanical properties, limiting their potential applications, due to the transient non-covalent interactions involved in the self-assembling phenomenon. Cross-linked SAP-hydrogels have been recently introduced to bridge this gap, but several questions remain open. New strategies leading to stiffer gels of SAPs may allow for a full exploitation of the SAP technology in TE and beyond. We have developed and characterized a genipin cross-linking strategy significantly increasing the stiffness and resiliency of FAQ(LDLK)3, a functionalized SAP already used for nervous cell cultures. We characterized different protocols of cross-linking, analyzing their dose and time-dependent efficiency, influencing stiffness, bioabsorption time and molecular arrangements. We choose the best developed protocol to electrospin into nanofibers, for the first time, self-standing, water-stable and flexible fibrous mats and micro-channels entirely made of SAPs. This work may open the door to the development and tailoring of bioprostheses entirely made of SAPs for different TE applications.
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Affiliation(s)
- Raffaele Pugliese
- IRCSS Casa Sollievo della Sofferenza, Unità di Ingegneria Tissutale, Viale Cappuccini 1, San Giovanni Rotondo, FG 71013, Italy.
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118
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Rodríguez-Rodríguez R, Espinosa-Andrews H, Velasquillo-Martínez C, García-Carvajal ZY. Composite hydrogels based on gelatin, chitosan and polyvinyl alcohol to biomedical applications: a review. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1581780] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Rogelio Rodríguez-Rodríguez
- Unidad Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Guadalajara, Jalisco, Mexico
| | - Hugo Espinosa-Andrews
- Unidad de Tecnología Alimentaria, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Zapopan, Jalisco, México
| | | | - Zaira Yunuen García-Carvajal
- Unidad Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, Guadalajara, Jalisco, Mexico
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119
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Osidak EO, Karalkin PA, Osidak MS, Parfenov VA, Sivogrivov DE, Pereira FDAS, Gryadunova AA, Koudan EV, Khesuani YD, Кasyanov VA, Belousov SI, Krasheninnikov SV, Grigoriev TE, Chvalun SN, Bulanova EA, Mironov VA, Domogatsky SP. Viscoll collagen solution as a novel bioink for direct 3D bioprinting. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:31. [PMID: 30830351 DOI: 10.1007/s10856-019-6233-y] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Collagen is one of the most promising materials for 3D bioprinting because of its distinguished biocompatibility. Cell-laden constructs made of pure collagen with or without incorporated growth supplements support engineered constructs persistence in culture and are perfectly suitable for grafting. The limiting factor for direct 3D collagen printing was poor printability of collagen solutions, especially admixed with cells or tissue spheroids. In our study, we showed that concentrated solutions of native collagen branded Viscoll were effective as bioinks with high fidelity performance. Viscoll containing 20, 30, or 40 mg/ml collagen were used for direct extrusion 3D bioprinting to form scaffolds appropriate to support spatial arrangement of tissue spheroids into rigid patterns with resolution of 0.5 mm in details. Incorporated cells demonstrated sufficient viability. Associated rheological study showed that good printability of the collagen solutions correlates with their increased storage modulus value, notably exceeding the loss modulus value. The proper combination of these physical parameters could become technological criteria for manufacturing various collagen bioinks for 3D bioprinting.
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Affiliation(s)
- Egor O Osidak
- Imtek Ltd., 3rd Cherepkovskaya 15A, Moscow, Russia.
- Gamaleya Research Institute of Epidemiology and Microbiology Federal State Budgetary Institution, Ministry of Health of the Russian Federation, Gamalei 18, Moscow, Russia.
| | - Pavel A Karalkin
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
- P. A. Hertsen Moscow Oncology Research Center-branch of FSBI NMRRC of the Ministry of Health of Russia, 3 2nd Botkinsky drive, Moscow, Russia
| | | | - Vladislav A Parfenov
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
| | | | - Frederico D A S Pereira
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
| | - Anna A Gryadunova
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
- Institute for Regenerative Medicine, Ministry of Health of the Russian Federation, Sechenov University, Trubetskaya 8/2, Moscow, Russia
| | - Elizaveta V Koudan
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
| | - Yusef D Khesuani
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
| | | | - Sergei I Belousov
- National Research Center «Kurchatov Institute», Akademika Kurchatova pl.,1, Moscow, Russia
| | | | - Timofei E Grigoriev
- National Research Center «Kurchatov Institute», Akademika Kurchatova pl.,1, Moscow, Russia
| | - Sergey N Chvalun
- National Research Center «Kurchatov Institute», Akademika Kurchatova pl.,1, Moscow, Russia
| | - Elena A Bulanova
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
| | - Vladimir A Mironov
- Laboratory of Biotechnological Research, 3D Bioprinting Solutions, Kashirskoe Roadway, 68/2, Moscow, Russia
- Institute for Regenerative Medicine, Ministry of Health of the Russian Federation, Sechenov University, Trubetskaya 8/2, Moscow, Russia
| | - Sergey P Domogatsky
- Imtek Ltd., 3rd Cherepkovskaya 15A, Moscow, Russia
- Russian Cardiology Research and Production Center Federal State Budgetary Institution, Ministry of Health of the Russian Federation, 3 Cherepkovskaya 15A, Moscow, Russia
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120
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Compaan AM, Song K, Huang Y. Gellan Fluid Gel as a Versatile Support Bath Material for Fluid Extrusion Bioprinting. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5714-5726. [PMID: 30644714 DOI: 10.1021/acsami.8b13792] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Biomedical applications of three-dimensional (3D) printing demand complex hydrogel-based constructs laden with living cells. Advanced support materials facilitate the fabrication of such constructs. This work demonstrates the versatility and utility of a gellan fluid gel as a support bath material for fabricating freeform 3D hydrogel constructs from a variety of materials. Notably, the gellan fluid gel support bath can supply sensitive biological cross-linking agents such as enzymes to printed fluid hydrogel precursors for mild covalent hydrogel cross-linking. This mild fabrication approach is suitable for fabricating cell-laden gelatin-based constructs in which mammalian cells can form intercellular contacts within hours of fabrication; cellular activity is observed over several days within printed constructs. In addition, gellan is compatible with a wide range of ionic and thermal conditions, which makes it a suitable support material for ionically cross-linked structures generated by printing alginate-based ink formulations as well as thermosensitive hydrogel constructs formed from gelatin. Ultraviolet irradiation of printed structures within the support bath is also demonstrated for photoinitiated cross-linking of acrylated ink materials. Furthermore, gellan support material performance in terms of printed filament stability and residual support material on constructs is found to be comparable and superior, respectively, to previously reported support materials.
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121
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Esteves C, Santos GM, Alves C, Palma SI, Porteira AR, Filho J, Costa HM, Alves VD, Morais Faustino BM, Ferreira I, Gamboa H, Roque AC. Effect of film thickness in gelatin hybrid gels for artificial olfaction. Mater Today Bio 2019; 1:100002. [PMID: 32159137 PMCID: PMC7061580 DOI: 10.1016/j.mtbio.2019.100002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 11/27/2022] Open
Abstract
Artificial olfaction is a fast-growing field aiming to mimic natural olfactory systems. Olfactory systems rely on a first step of molecular recognition in which volatile organic compounds (VOCs) bind to an array of specialized olfactory proteins. This results in electrical signals transduced to the brain where pattern recognition is performed. An efficient approach in artificial olfaction combines gas-sensitive materials with dedicated signal processing and classification tools. In this work, films of gelatin hybrid gels with a single composition that change their optical properties upon binding to VOCs were studied as gas-sensing materials in a custom-built electronic nose. The effect of films thickness was studied by acquiring signals from gelatin hybrid gel films with thicknesses between 15 and 90 μm when exposed to 11 distinct VOCs. Several features were extracted from the signals obtained and then used to implement a dedicated automatic classifier based on support vector machines for data processing. As an optical signature could be associated to each VOC, the developed algorithms classified 11 distinct VOCs with high accuracy and precision (higher than 98%), in particular when using optical signals from a single film composition with 30 μm thickness. This shows an unprecedented example of soft matter in artificial olfaction, in which a single gelatin hybrid gel, and not an array of sensing materials, can provide enough information to accurately classify VOCs with small structural and functional differences.
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Affiliation(s)
- Carina Esteves
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Gonçalo M.C. Santos
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Cláudia Alves
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
- LIBPhys-UNL, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Susana I.C.J. Palma
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Ana R. Porteira
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - João Filho
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Henrique M.A. Costa
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Vitor D. Alves
- LEAF – Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Lisboa, Portugal
| | - Bruno M. Morais Faustino
- CENIMAT/I3N, Departamento de Ciências dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Isabel Ferreira
- CENIMAT/I3N, Departamento de Ciências dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Hugo Gamboa
- LIBPhys-UNL, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Ana C.A. Roque
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
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122
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Biocatalysis by Transglutaminases: A Review of Biotechnological Applications. MICROMACHINES 2018; 9:mi9110562. [PMID: 30715061 PMCID: PMC6265872 DOI: 10.3390/mi9110562] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 10/23/2018] [Indexed: 02/08/2023]
Abstract
The biocatalytic activity of transglutaminases (TGs) leads to the synthesis of new covalent isopeptide bonds (crosslinks) between peptide-bound glutamine and lysine residues, but also the transamidation of primary amines to glutamine residues, which ultimately can result into protein polymerisation. Operating with a cysteine/histidine/aspartic acid (Cys/His/Asp) catalytic triad, TGs induce the post-translational modification of proteins at both physiological and pathological conditions (e.g., accumulation of matrices in tissue fibrosis). Because of the disparate biotechnological applications, this large family of protein-remodelling enzymes have stimulated an escalation of interest. In the past 50 years, both mammalian and microbial TGs polymerising activity has been exploited in the food industry for the improvement of aliments' quality, texture, and nutritive value, other than to enhance the food appearance and increased marketability. At the same time, the ability of TGs to crosslink extracellular matrix proteins, like collagen, as well as synthetic biopolymers, has led to multiple applications in biomedicine, such as the production of biocompatible scaffolds and hydrogels for tissue engineering and drug delivery, or DNA-protein bio-conjugation and antibody functionalisation. Here, we summarise the most recent advances in the field, focusing on the utilisation of TGs-mediated protein multimerisation in biotechnological and bioengineering applications.
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123
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Li L, Du Y, Xiong Y, Ding Z, Lv G, Li H, Liu T. Injectable negatively charged gelatin microsphere-based gels as hemostatic agents for intracavitary and deep wound bleeding in surgery. J Biomater Appl 2018; 33:647-661. [DOI: 10.1177/0885328218807358] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Gelatin, as natural macromolecular material, has been used in biomedical fields widely. In this study, various injectable gelatins A, B, and their compound AB microsphere-based gels (A-GMGs, B-GMGs and AB-GMGs) were prepared through water-in-oil emulsion method for hemostasis, and the effects of blood coagulation in vitro and surgical hemostasis (a deep liver wound model) in vivo were evaluated. Furthermore, the influences of gelatin sorts, the size of microsphere, zeta potential (ZP) and viscoelastic properties on hemostasis were also assessed. Results showed that the gelatin microspheres (GMs) exhibited smooth surface, good sphericity and the particle size of a rough normal distribution. GMs carried negative charges and their electronegativity was stronger than that of gelatin A (GA) and gelatin B (GB) raw materials. Rheological analysis showed that a decreasing particle size of the microspheres led to stronger gel strength, and solid-like gels were exhibited under low stress conditions and liquid-like gels were exhibited under high stress conditions. The blood clotting time of B-GMGs was within 60 s, which exhibited a significantly higher blood clotting effect compared with control groups. The hemostasis assay in vivo showed that the gels had better hemostatic effect on a deep liver wound bleeding model compared with control groups, especially B-GMGs. However, in vivo and vitro hemostatic experiments, particle size of GMs had no obvious influence on the hemostatic effect of the gels. In addition, the CCK-8 assay of bone marrow mesenchymal stem cells of murine (mMSCs) indicated non-cytotoxicity of GMs for cells. These results demonstrated that the gelatin microsphere-based gels (GMGs) had potential to be an effective hemostatic material for intracavitary and deep wound bleeding in surgery.
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Affiliation(s)
- Lin Li
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Yan Du
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Yi Xiong
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Zhengwen Ding
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Guoyu Lv
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Hong Li
- College of Physical Science and Technology, Sichuan University, Chengdu, China
| | - Tielong Liu
- Department of Orthopaedic Oncology, Changzheng Hospital, Second Military Medical University, Shanghai, China
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124
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Hou S, Lake R, Park S, Edwards S, Jones C, Jeong KJ. Injectable Macroporous Hydrogel Formed by Enzymatic Cross-Linking of Gelatin Microgels. ACS APPLIED BIO MATERIALS 2018; 1:1430-1439. [PMID: 31701093 DOI: 10.1021/acsabm.8b00380] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Injectable hydrogels can be useful tools for facilitating wound healing since they conform to the irregular shapes of wounds, serving as a temporary matrix during the healing process. However, the lack of inherent pore structures of most injectable hydrogels prohibits desired interactions with the cells of the surrounding tissues limiting their clinical efficacy. Here, we introduce a simple, cost-effective and highly biofunctional injectable macroporous hydrogel made of gelatin microgels crosslinked by microbial transglutaminase (mTG). Pores are created by the interstitial space among the microgels. A water-in-oil emulsion technique was used to create gelatin microgels of an average size of 250μm in diameter. When crosslinked with mTG, the microgels adhered to each other to form a bulk hydrogel with inherent pores large enough for cell migration. The viscoelastic properties of the porous hydrogel were similar to those of nonporous gelatin hydrogel made by adding mTG to a homogeneous gelatin solution. The porous hydrogel supported higher cellular proliferation of human dermal fibroblasts (hDFs) than the nonporous hydrogel over two weeks, and allowed the migration of hDFs into the pores. Conversely, the hDFs were unable to permeate the surface of the nonporous hydrogel. To demonstrate its potential use in wound healing, the gelatin microgels were injected with mTG into a cut out section of an excised porcine cornea. Due to the action of mTG, the porous hydrogel stably adhered to the cornea tissue for two weeks. Confocal images showed that a large number of cells from the cornea tissue migrated into the interstitial space of the porous hydrogel. The porous hydrogel was also used for the controlled release of platelet-derived growth factor (PDGF), increasing the proliferation of hDFs compared to the nonporous hydrogel. This gelatin microgel-based porous hydrogel will be a useful tool for wound healing and tissue engineering.
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Affiliation(s)
- Shujie Hou
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Rachel Lake
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Shiwha Park
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Seth Edwards
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Chante Jones
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Kyung Jae Jeong
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
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125
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Zhang W, Zhang K, Yan S, Wu J, Yin J. A tough and self-healing poly(l-glutamic acid)-based composite hydrogel for tissue engineering. J Mater Chem B 2018; 6:6865-6876. [DOI: 10.1039/c8tb01981a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Developing a tough, self-healing, and biodegradable composite hydrogel based on poly(l-glutamic acid) leads to great potential in tissue engineering applications.
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Affiliation(s)
- Weijun Zhang
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Kunxi Zhang
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Shifeng Yan
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jie Wu
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Jingbo Yin
- Department of Polymer Materials
- Shanghai University
- Shanghai 200444
- P. R. China
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