1
|
Ferreira S, Nicoletti VR, Dragosavac M. Novel methods to induce complex coacervation using dual fluid nozzle and metal membranes: Part II – use of metal membrane technology to induce complex coacervation. FOOD AND BIOPRODUCTS PROCESSING 2023. [DOI: 10.1016/j.fbp.2023.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
|
2
|
Kim NE, Park S, Kim S, Choi JH, Kim SE, Choe SH, Kang TW, Song JE, Khang G. Development of Gelatin-Based Shape-Memory Polymer Scaffolds with Fast Responsive Performance and Enhanced Mechanical Properties for Tissue Engineering Applications. ACS OMEGA 2023; 8:6455-6462. [PMID: 36844585 PMCID: PMC9947991 DOI: 10.1021/acsomega.2c06730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Shape-memory polymers (SMPs) can be defined as a reversibly changing form through deformation and recovery by external stimuli. However, there remain application limitations of SMPs, such as complicated preparation processes and slow shape recovery. Here, we designed gelatin-based shape-memory scaffolds by a facile dipping method in tannic acid solution. The shape-memory effect of scaffolds was attributed to the hydrogen bond between gelatin and tannic acid, which acts as the net point. Moreover, gelatin (Gel)/oxidized gellan gum (OGG)/calcium chloride (Ca) was intended to induce faster and more stable shape-memory behavior through the introduction of a Schiff base reaction. The chemical, morphological, physicochemical, and mechanical properties of the fabricated scaffolds were evaluated, and those results showed that the Gel/OGG/Ca had improved mechanical properties and structural stability compared with other scaffold groups. Additionally, Gel/OGG/Ca exhibited excellent shape-recovery behavior of 95.8% at 37 °C. As a consequence, the proposed scaffolds can be fixed to the temporary shape at 25 °C in just 1 s and recovered to the original shape at 37 °C within 30 s, implying a great potential for minimally invasive implantation.
Collapse
Affiliation(s)
- Na Eun Kim
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Sunjae Park
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Sooin Kim
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Joo Hee Choi
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Se Eun Kim
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Seung Ho Choe
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Tae woong Kang
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Jeong Eun Song
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
| | - Gilson Khang
- Department
of Bionanotechnology and Bio-Convergence Engineering, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
- Department
of PolymerNano Science & Technology and Polymer Materials Fusion
Research Center, Jeonbuk National University, 567, Baekje-daero, Deakjin-gu, Jeonju-si, Jeonbuk 54896, Korea
- Department
of Orthopaedic & Traumatology, Airlangga
University, Jl. Airlangga No. 4-6, Airlangga,
Kec. Gubeng, Kota SBY, Jawa Timur 60115, Indonesia
| |
Collapse
|
3
|
Fan L, Ge X, Qian Y, Wei M, Zhang Z, Yuan WE, Ouyang Y. Advances in Synthesis and Applications of Self-Healing Hydrogels. Front Bioeng Biotechnol 2020; 8:654. [PMID: 32793562 PMCID: PMC7385058 DOI: 10.3389/fbioe.2020.00654] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 05/27/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Hydrogels, a type of three-dimensional (3-D) crosslinked network of polymers containing a high water concentration, have been receiving increasing attention in recent years. Self-healing hydrogels, which can return to their original structure and function after physical damage, are especially attractive. Some self-healable hydrogels have several kinds of properties such as injectability, adhesiveness, and conductivity, which enable them to be used in the manufacturing of drug/cell delivery vehicles, glues, electronic devices, and so on. MAIN BODY This review will focus on the synthesis and applications of self-healing hydrogels. Their repair mechanisms and potential applications in pharmaceutical, biomedical, and other areas will be introduced. CONCLUSION Self-healing hydrogels are used in various fields because of their ability to recover. The prospect of self-healing hydrogels is promising, and they may be further developed for various applications.
Collapse
Affiliation(s)
- Leqi Fan
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Sixth People’s Hospital East Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Xuemei Ge
- School of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, China
| | - Yebin Qian
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- Shanghai Sixth People’s Hospital East Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| | - Minyan Wei
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Zirui Zhang
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Wei-En Yuan
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Yuanming Ouyang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China
- Shanghai Sixth People’s Hospital East Affiliated to Shanghai University of Medicine & Health Sciences, Shanghai, China
| |
Collapse
|
4
|
Löwenberg C, Julich-Gruner KK, Neffe AT, Behl M, Lendlein A. Salt-Induced Shape-Memory Effect in Gelatin-Based Hydrogels. Biomacromolecules 2020; 21:2024-2031. [PMID: 32364721 DOI: 10.1021/acs.biomac.9b01753] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Hydrophilic biopolymers display a strong tendency for self-organization into stable secondary, tertiary, and quaternary structures in aqueous environments. These structures are sensitive to changes in external conditions, such as temperature, pH or ions/salts, which may lead to molecular and/or macroscopic transitions. Here, we report on biopolymer-based stimuli-sensitive switchable matrices showing a shape-memory function as an output being alternatively switched by two different input signals, such as environmental changes in salt concentration or temperature. This was realized by implementing a shape-memory function in hydrogels based on the coil-to-helix transition of protein chains in gelatin-based networks. The hydrogels exhibited mechanical properties similar to that of soft tissue (storage modulus G' = 1-100 kPa) and high swelling capabilities (Q = 1000-3000 vol %). In these gelatin-based networks, the covalent netpoints defined the permanent shape while after deformation helicalization of the gelatin acted as reversible stimuli-sensitive switches providing additional crosslinks capable of fixing the deformed temporary shape. By using either chaotropic salts to suppress gelatin helicalization or kosmotropic salts to support conformational changes of gelatin toward a helical orientation, these additional crosslinks could be cleaved or formed. In bending experiments, the strain fixity (Rf) and strain recovery ratios (Rr) were determined. While Rf ranged from 65 to 95% and was depending on the network composition, Rr were independent of the hydrogel composition with values about 100%. In addition, Rf and Rr were independent of the type of chaotropic salt that was used in this study, showing equal Rf and Rr values for MgCl2, NaSCN, and Mg(SCN)2.
Collapse
Affiliation(s)
- Candy Löwenberg
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany
| | - Konstanze K Julich-Gruner
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany
| | - Axel T Neffe
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany
| | - Marc Behl
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany
| | - Andreas Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Kantstr. 55, 14513 Teltow, Germany.,Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| |
Collapse
|
5
|
The Effect of Ti-6Al-4V Alloy Surface Structure on the Adhesion and Morphology of Unidirectional Freeze-Coated Gelatin. COATINGS 2020. [DOI: 10.3390/coatings10050434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The modification of a metal implant surface with a biomimetic coating of bone-like anisotropic and graded porosity structures to improve its biological anchorage with the surrounding bone tissue at implanting, is still a high challenge. In this paper, we present an innovative way of a gelatin (GEL) dip-coating on Ti-6Al-4V substrates of different square-net surface textures by the unidirectional deep-freezing process at simultaneous cross-linking using carbodiimide chemistry. Different concentrations of GEL solution were used to study the changes in morphology, density, and mechanical properties of the coatings. In addition, the surface free energy and polarity of Ti-6Al-4V substrate surfaces and GEL solutions have been evaluated to assess the wetting properties at the substrate interfaces, and to describe the adhesion of GEL macromolecules with their surfaces, being supported by mechanical pull-out testing. The results indicate that the coating’s morphology depends primarily on the Ti-6Al-4V substrate’s surface texture and second, on the concentration of GEL, which further influences their adhesion properties, orientation, morphological arrangement, as well as compression strength. The substrate with a 300 × 300 μm2 texture resulted in a highly adhered GEL coating with ≥80% porosity, interconnected and well-aligned pores of 75–200 μm, required to stimulate the bone ingrowth, mechanically and histologically.
Collapse
|
6
|
Lee SS, Kim HD, Kim SHL, Kim I, Kim IG, Choi JS, Jeong J, Kim JH, Kwon SK, Hwang NS. Self-Healing and Adhesive Artificial Tissue Implant for Voice Recovery. ACS APPLIED BIO MATERIALS 2018; 1:1134-1146. [DOI: 10.1021/acsabm.8b00349] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Seunghun S. Lee
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Hwan D. Kim
- School of Chemical and Biological Engineering, The Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Seung Hyun L. Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Inseon Kim
- School of Chemical and Biological Engineering, The Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - In Gul Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Ji Suk Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Jiwoon Jeong
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Jung Hun Kim
- School of Chemical and Biological Engineering, The Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Seong Keun Kwon
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | - Nathaniel S. Hwang
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul 08826, Republic of Korea
- School of Chemical and Biological Engineering, The Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
- BioMAX/N-Bio Institute, Seoul National University, Seoul 08826, Republic of Korea
| |
Collapse
|
7
|
Liu X, Chen J. HyRes: a coarse-grained model for multi-scale enhanced sampling of disordered protein conformations. Phys Chem Chem Phys 2017; 19:32421-32432. [PMID: 29186229 PMCID: PMC5729119 DOI: 10.1039/c7cp06736d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Efficient coarse-grained (CG) models can be coupled with atomistic force fields to accelerate the sampling of atomistic energy landscapes in the multi-scale enhanced sampling (MSES) framework. This approach may be particularly suitable for generating atomistic conformational ensembles of intrinsically disordered proteins (IDPs). While MSES is relatively robust to inherent CG artifacts, achieving optimal sampling efficiency requires CG modeling to generate the local and long-range fluctuations that are largely consistent with those at the atomistic level. Here, we describe a new hybrid resolution CG model (HyRes) for MSES simulations of disordered protein states, which is specifically designed to provide semi-quantitative secondary structure propensities together with a qualitative description of long-range nonspecific interactions. The HyRes model contains an atomistic description of the backbone with intermediate resolution side chains. The secondary structure propensities are tuned by adjusting the backbone hydrogen-bonding strength and the ϕ/ψ torsion profile. The sizes and covalent geometries of the side chains are parameterized to reproduce distributions derived from atomistic simulations. Lennard-Jones parameters for sidechain beads are assigned to reproduce statistical potentials derived from the protein structural database, and then globally parameterized with nonspecific electrostatic interactions to reproduce the free energy profiles of pair wise interactions and the key conformational properties of model peptides. Application of HyRes to MSES simulations of small IDPs suggests that it is capable of driving faster structural transitions at the atomistic level and increasing the convergence rate compared to the Cα-only Gō-like models previously utilized. With further optimization, we believe that the new CG model could greatly improve the efficiency of MSES simulations of the larger and more complex IDPs frequently involved in cellular signalling and regulation.
Collapse
Affiliation(s)
- Xiaorong Liu
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA.
| | | |
Collapse
|
8
|
Huang J, Zhao L, Wang T, Sun W, Tong Z. NIR-Triggered Rapid Shape Memory PAM-GO-Gelatin Hydrogels with High Mechanical Strength. ACS APPLIED MATERIALS & INTERFACES 2016; 8:12384-12392. [PMID: 27116394 DOI: 10.1021/acsami.6b00867] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Shape memory hydrogels containing over 76 wt % of water were synthesized in a one-pot method, and interpenetrating double network was formed by physically cross-linked gelatin network and chemically cross-linked polyacrylamide (PAM) network with graphene oxide (GO). The temporary shape was quickly fixed by cooling in ice water for 30 s after deformation at 80 °C for 10 s. Shape recovery started in 10 s under near-infrared (NIR) irradiation and almost completed within 60 s depending on the curling angle. A small amount of GO in the hydrogels (≤1.5 mg/mL) played a key role in NIR energy absorption and transformation into thermal energy. The hydrogel without GO showed no response to the NIR irradiation and cannot recover to its permanent shape by NIR irradiation. Temperature sweep was conducted in the cycle of 20 °C → 80 °C → 20 °C, and the structure change in the hydrogels with temperature was investigated according to the storage modulus G' and tangent of the loss angle tan δ as a function of the hydrogel composition. The shape-memory capability was confirmed as the contribution from the triple-helix cross-linking network of gelatin. High mechanical toughness (strength > 400 kPa and broken strain > 500%) was achieved by the double-network with the sacrificial gelatin network and GO bridging to dissipate deformation energy. The optimized composition of the hydrogel was found to be a key point to realize stable temporary shape and rapid recovery to the permanent shape controlled by NIR irradiation with reasonable strength. The facile preparation and noncontact gentle stimulus of the present hydrogel hold great potential to be used in soft actuator materials.
Collapse
Affiliation(s)
- Jiahe Huang
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Lei Zhao
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Tao Wang
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Weixiang Sun
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| | - Zhen Tong
- Research Institute of Materials Science and ‡State Key Laboratory of Luminescent Materials and Devices, South China University of Technology , Guangzhou 510640, China
| |
Collapse
|
9
|
Berdichevski A, Shachaf Y, Wechsler R, Seliktar D. Protein composition alters in vivo resorption of PEG-based hydrogels as monitored by contrast-enhanced MRI. Biomaterials 2015; 42:1-10. [DOI: 10.1016/j.biomaterials.2014.11.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/26/2014] [Accepted: 11/07/2014] [Indexed: 12/21/2022]
|
10
|
Roussenova M, Enrione J, Diaz-Calderon P, Taylor A, Ubbink J, Alam M. Effect of polyols on the molecular organization and thermodynamic properties of low water content gelatin oligomers. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
11
|
Podlipec R, Gorgieva S, Jurašin D, Urbančič I, Kokol V, Strancar J. Molecular mobility of scaffolds' biopolymers influences cell growth. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15980-15990. [PMID: 25153341 DOI: 10.1021/am5037719] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Understanding biocompatibility of materials and scaffolds is one of the main challenges in the field of tissue engineering and regeneration. The complex nature of cell-biomaterial interaction requires extensive preclinical functionality testing by studying specific cell responses to different biomaterial properties, from morphology and mechanics to surface characteristics at the molecular level. Despite constant improvements, a more general picture of biocompatibility is still lacking and tailormade scaffolds are not yet available. The scope of our study was thus the investigation of the correlation of fibroblast cell growth on different gelatin scaffolds with their morphological, mechanical as well as surface molecular properties. The latter were thoroughly investigated via polymer molecular mobility studied by site-directed spin labeling and electron paramagnetic resonance spectroscopy (EPR) for the first time. Anisotropy of the rotational motion of the gelatin side chain mobility was identified as the most correlated quantity with cell growth in the first days after adhesion, while weaker correlations were found with scaffold viscoelasticity and no correlations with scaffold morphology. Namely, the scaffolds with highly mobile or unrestricted polymers identified with the cell growth being five times less efficient (N(cells) = 60 ± 25 mm(-2)) as compared to cell growth on the scaffolds with considerable part of polymers with the restricted rotational motion (N(cells) = 290 ± 25 mm(-2)). This suggests that molecular mobility of scaffold components could play an important role in cell response to medical devices, reflecting a new aspect of the biocompatibility concept.
Collapse
Affiliation(s)
- Rok Podlipec
- Centre of Excellence NAMASTE , Jamova cesta 39, SI-1000 Ljubljana, Slovenia
| | | | | | | | | | | |
Collapse
|
12
|
Díaz-Calderón P, Caballero L, Melo F, Enrione J. Molecular configuration of gelatin–water suspensions at low concentration. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.12.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
13
|
Gorgieva S, Kokol V. Processing of gelatin-based cryogels with improved thermomechanical resistance, pore size gradient, and high potential for sustainable protein drug release. J Biomed Mater Res A 2014; 103:1119-30. [PMID: 24924219 DOI: 10.1002/jbm.a.35261] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 06/04/2014] [Indexed: 01/15/2023]
Abstract
Porous gelatin (GEL) cryogels were processed by spatiotemporal and temperature-controlled gelation and freezing-lyophilizaton process, followed by zero-length crosslinking, using different molarities of reagents (EDC and NHS) and reaction media (100% PBS or 20/80% PBS/EtOH mixture) for variable time extensions (1-24 h). In this way, tuneable cryogels with gradient microporosity (from 100 µm to 1000 µm) were formed, being mainly influenced by crosslinkers' concentration and EtOH addition. Later affect the pore morphology (from round to ellipsoid), consequently modulating the steady-state physiological swelling profile toward twice lower values (∼ 600%) comparing to stepwise swelling of in 100% PBS media crosslinked cryogels. While the presence of EtOH decelerate the crosslinking kinetic by retaining cryogels' microstructure formed during freezing, the 100% PBS and higher EDC molarity resulted in approximately 40% crosslinking degree, being expressed as a thermal resistance of cryogels up to approximately 73°C. Finally, the tuneable enzymatic resistance allow time-dependent poly-L-Lysine (pL) release profile in up to month period. The processed GEL cryogels have potential in broad range biomedical applications, especially as sustainable, protein-based drug delivery systems.
Collapse
Affiliation(s)
- Selestina Gorgieva
- Faculty of Mechanical Engineering, Institute for Engineering Materials and Design, University of Maribor, Maribor, Slovenia
| | | |
Collapse
|
14
|
Antonov YA, Zhuravleva IL. Macromolecular complexes of BSA with gelatin. Int J Biol Macromol 2012; 51:319-28. [DOI: 10.1016/j.ijbiomac.2012.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 05/07/2012] [Accepted: 05/09/2012] [Indexed: 11/28/2022]
|
15
|
Bode F, da Silva MA, Drake AF, Ross-Murphy SB, Dreiss CA. Enzymatically Cross-Linked Tilapia Gelatin Hydrogels: Physical, Chemical, and Hybrid Networks. Biomacromolecules 2011; 12:3741-52. [DOI: 10.1021/bm2009894] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Franziska Bode
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Marcelo Alves da Silva
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - Alex F. Drake
- Biomolecular Spectroscopy Centre, King’s College London, The Wolfson Wing, Hodgkin Building, London SE1 1UL, United Kingdom
| | - Simon B. Ross-Murphy
- Materials Science Centre, University of Manchester, Grosvenor Street, Manchester M1 7HS, United Kingdom
| | - Cécile A. Dreiss
- Institute of Pharmaceutical Science, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
| |
Collapse
|
16
|
Ronsin O, Caroli C, Baumberger T. Interplay between shear loading and structural aging in a physical gelatin gel. PHYSICAL REVIEW LETTERS 2009; 103:138302. [PMID: 19905546 DOI: 10.1103/physrevlett.103.138302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2009] [Indexed: 05/28/2023]
Abstract
We show that the aging of the mechanical relaxation of a gelatin gel exhibits the same scaling phenomenology as polymer and colloidal glasses. In addition, gelatin is known to exhibit logarithmic structural aging (stiffening). We find that stress accelerates this process. However, this effect is definitely irreducible to a mere age shift with respect to natural aging. We suggest that it is interpretable in terms of elastically aided elementary (coil --> helix) local events whose dynamics gradually slows down as aging increases geometric frustration.
Collapse
Affiliation(s)
- O Ronsin
- INSP, UPMC Université Paris 06, CNRS UMR 7588, 75015 Paris, France
| | | | | |
Collapse
|
17
|
|