1
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Charlton SG, Jana S, Chen J. Yielding behaviour of chemically treated Pseudomonas fluorescens biofilms. Biofilm 2024; 8:100209. [PMID: 39071175 PMCID: PMC11279707 DOI: 10.1016/j.bioflm.2024.100209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/20/2024] [Accepted: 07/02/2024] [Indexed: 07/30/2024] Open
Abstract
The mechanics of biofilms are intrinsically shaped by their physicochemical environment. By understanding the influence of the extracellular matrix composition, pH and elevated levels of cationic species on the biofilm rheology, novel living materials with tuned properties can be formulated. In this study, we examine the role of a chaotropic agent (urea), two divalent cations and distilled deionized water on the nonlinear viscoelasticity of a model biofilm Pseudomonas fluorescens. The structural breakdown of each biofilm is quantified using tools of non-linear rheology. Our findings reveal that urea induced a softening response, and displayed strain overshoots comparable to distilled deionized water, without altering the microstructural packing fraction and macroscale morphology. The absorption of divalent ferrous and calcium cations into the biofilm matrix resulted in stiffening and a reduction in normalized elastic energy dissipation, accompanied by macroscale morphological wrinkling and moderate increases in the packing fraction. Notably, ferrous ions induced a predominance of rate dependent yielding, whereas the calcium ions resulted in equal contribution from both rate and strain dependent yielding and structural breakdown of the biofilms. Together, these results indicate that strain rate increasingly becomes an important factor controlling biofilm fluidity with cation-induced biofilm stiffening. The finding can help inform effective biofilm removal protocols and in development of bio-inks for additive manufacturing of biofilm derived materials.
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Affiliation(s)
- Samuel G.V. Charlton
- Department of Civil, Environmental and Geomatic Engineering, Institute of Environmental Engineering, ETH Zürich, Zürich, 8093, Switzerland
- Newcastle University, School of Engineering, Newcastle Upon Tyne, NE1 7RU, United Kingdom
| | - Saikat Jana
- Ulster University, School of Engineering, 2-24 York Street, Belfast, BT15 1AP, United Kingdom
- Newcastle University, School of Engineering, Newcastle Upon Tyne, NE1 7RU, United Kingdom
| | - Jinju Chen
- Newcastle University, School of Engineering, Newcastle Upon Tyne, NE1 7RU, United Kingdom
- Loughborough University, Department of Materials, Loughborough, LE11 3TU, United Kingdom
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2
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Choi JH, Lee JS, Yang DH, Nah H, Min SJ, Lee SY, Yoo JH, Chun HJ, Moon HJ, Hong YK, Heo DN, Kwon IK. Development of a Temperature-Responsive Hydrogel Incorporating PVA into NIPAAm for Controllable Drug Release in Skin Regeneration. ACS OMEGA 2023; 8:44076-44085. [PMID: 38027389 PMCID: PMC10666273 DOI: 10.1021/acsomega.3c06291] [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: 08/24/2023] [Revised: 10/09/2023] [Accepted: 10/30/2023] [Indexed: 12/01/2023]
Abstract
Melanoma, a highly malignant and aggressive form of skin cancer, poses a significant global health threat, with limited treatment options and potential side effects. In this study, we developed a temperature-responsive hydrogel for skin regeneration with a controllable drug release. The hydrogel was fabricated using an interpenetrating polymer network (IPN) of N-isopropylacrylamide (NIPAAm) and poly(vinyl alcohol) (PVA). PVA was chosen for its adhesive properties, biocompatibility, and ability to address hydrophobicity issues associated with NIPAAm. The hydrogel was loaded with doxorubicin (DOX), an anticancer drug, for the treatment of melanoma. The NIPAAm-PVA (N-P) hydrogel demonstrated temperature-responsive behavior with a lower critical solution temperature (LCST) around 34 °C. The addition of PVA led to increased porosity and faster drug release. In vitro biocompatibility tests showed nontoxicity and supported cell proliferation. The N-P hydrogel exhibited effective anticancer effects on melanoma cells due to its rapid drug release behavior. This N-P hydrogel system shows great promise for controlled drug delivery and potential applications in skin regeneration and cancer treatment. Further research, including in vivo studies, will be essential to advance this hydrogel system toward clinical translation and impactful advancements in regenerative medicine and cancer therapeutics.
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Affiliation(s)
- Jae Hwan Choi
- Department
of Biomedical Science and Technology, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
- Biofirends
Inc., 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Jae Seo Lee
- Department
of Dental Materials, School of Dentistry, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic
of Korea
- Division
of Engineering in Medicine, Brigham and Women’s Hospital, Harvard Medical School, 65 Landsdowne Street, Cambridge, Massachusetts 02139, United States
| | - Dae Hyeok Yang
- Institute
of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Haram Nah
- Biofirends
Inc., 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
- Department
of Dentistry, Graduate School, Kyung Hee
University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Sung Jun Min
- Department
of Dentistry, Graduate School, Kyung Hee
University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Seung Yeon Lee
- Department
of Dentistry, Graduate School, Kyung Hee
University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Ji Hye Yoo
- Department
of Biomedical Science and Technology, Graduate School, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
| | - Heung Jae Chun
- Institute
of Cell and Tissue Engineering, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Ho-Jin Moon
- Department
of Dental Materials, School of Dentistry, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic
of Korea
| | - Young Ki Hong
- Department
of Biomedical Materials, Konyang University, Daejeon 35365, Republic of Korea
| | - Dong Nyoung Heo
- Biofirends
Inc., 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea
- Department
of Dental Materials, School of Dentistry, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic
of Korea
| | - Il Keun Kwon
- Department
of Dental Materials, School of Dentistry, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic
of Korea
- Kyung
Hee University Medical Science Research Institute, Kyung Hee University, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic
of Korea
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3
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Kotova S, Kostjuk S, Rochev Y, Efremov Y, Frolova A, Timashev P. Phase transition and potential biomedical applications of thermoresponsive compositions based on polysaccharides, proteins and DNA: A review. Int J Biol Macromol 2023; 249:126054. [PMID: 37532189 DOI: 10.1016/j.ijbiomac.2023.126054] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/04/2023]
Abstract
Smart thermoresponsive polymers have long attracted attention as materials of a great potential for biomedical applications, mainly for drug delivery, tissue engineering and wound dressing, with a special interest to injectable hydrogels. Poly-N-isopropylacrylamide (PNIPAM) is the most important synthetic thermoresponsive polymer due to its physiologically relevant transition temperature. However, the use of unmodified PNIPAM encounters such problems as low biodegradability, low drug loading capacity, slow response to thermal stimuli, and insufficient mechanical robustness. The use of natural polysaccharides and proteins in combinations with PNIPAM, in the form of grafted copolymers, IPNs, microgels and physical mixtures, is aimed at overcoming these drawbacks and creating dual-functional materials with both synthetic and natural polymers' properties. When developing such compositions, special attention should be paid to preserving their key property, thermoresponsiveness. Addition of hydrophobic and hydrophilic fragments to PNIPAM is known to affect its transition temperature. This review covers various classes of natural polymers - polysaccharides, fibrous and non-fibrous proteins, DNA - used in combination with PNIPAM for the prospective biomedical purposes, with a focus on their phase transition temperatures and its relation to the natural polymer's structure.
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Affiliation(s)
- Svetlana Kotova
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia.
| | - Sergei Kostjuk
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; Department of Chemistry, Belarusian State University, Minsk 220006, Belarus; Research Institute for Physical Chemical Problems of the Belarusian State University, Minsk 220006, Belarus
| | - Yuri Rochev
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; National University of Ireland Galway, Galway H91 CF50, Ireland
| | - Yuri Efremov
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia
| | - Anastasia Frolova
- World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia
| | - Peter Timashev
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia; Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia
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4
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Yilmaz RB, Chaabane Y, Mansard V. Development of a Soft Actuator from Fast Swelling Macroporous PNIPAM Gels for Smart Braille Device Applications in Haptic Technology. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7340-7352. [PMID: 36706224 DOI: 10.1021/acsami.2c17835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The development of a cost-efficient braille device is a crucial challenge in haptic technology to improve the integration of visually impaired people. Exclusion of any group threatens the proper functioning of society. Commercially available braille devices still utilize piezoelectric actuators, which are expensive and bulky. The challenge of a more adapted braille device lies in the integration of a high number of actuators─on a millimeter scale─in order to independently move a matrix of pins acting as tactile cues. Unfortunately, no actuation strategy has been adapted to tackle this challenge. In this study, we develop a soft actuator based on a thermosensitive poly(N-isopropylacrylamide) (PNIPAM) gel. We introduce macroporosity to the gel (pores of 10 to 100 μm). It overcomes the diffusion─which is the limiting kinetic factor─and accelerates the gel response time from hours for the bulk gel to seconds for the macroporous gel. We study the properties of porous gels with various porosities. We also compare a mechanically reinforced nanocomposite gel (made of PNIPAM and Laponite clay) to a "classic" gel. As a result, we develop a fast-actuating gel with high cyclic performance. We then develop a single-pin braille setup, where actuation is controlled thanks to a swift temperature control of a macroporous gel cylinder. This new strategy offers a very promising actuation technology. It offers a simple and cost-efficient alternative to the current braille devices.
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Affiliation(s)
- Refik Baris Yilmaz
- CNRS, LAAS-CNRS, 7, avenue du Colonel Roche, BP 54200 31031 Toulouse Cedex 4, France
| | - Yosr Chaabane
- CNRS, LAAS-CNRS, 7, avenue du Colonel Roche, BP 54200 31031 Toulouse Cedex 4, France
| | - Vincent Mansard
- CNRS, LAAS-CNRS, 7, avenue du Colonel Roche, BP 54200 31031 Toulouse Cedex 4, France
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5
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Mansard V. A macroporous smart gel based on a pH-sensitive polyacrylic polymer for the development of large size artificial muscles with linear contraction. SOFT MATTER 2021; 17:9644-9652. [PMID: 34622903 DOI: 10.1039/d1sm01078f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The physics of soft matter can contribute to the revolution in robotics and medical prostheses. These two fields require the development of artificial muscles with behavior close to biological muscles. Today, artificial muscles rely mostly on active materials, which can deform reversibly. Nevertheless transport kinetics is the major limit for all of these materials. These actuators are only made of a thin layer of active material and using a large thickness dramatically reduces the actuation time. In this article, we demonstrate that a porous material reduces the limit of transport and enables the use of a large volume of active material. We synthesize a new active material: a macroporous gel, which is based on polyacrylic acid. This gel shows very large swelling when we increase the pH and the macroporosity dramatically reduces the swelling time of centimetric samples from one day to 100 s. We characterize the mechanical properties and swelling kinetics of this new material. This material is well adapted for soft robotics because of its large swelling ratio (300%) and its capacity to apply a pressure of 150 mbar during swelling. We demonstrate finally that this material can be used in a McKibben muscle producing linear contraction, which is particularly adapted for robotics. The muscle contracts by 9% of its initial length within 100 s, which corresponds to the gel swelling time.
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Affiliation(s)
- Vincent Mansard
- CNRS, LAAS-CNRS, 7, avenue du Colonel Roche, BP 54200 31031, Toulouse Cedex 4, France.
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6
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Alsaid Y, Wu S, Wu D, Du Y, Shi L, Khodambashi R, Rico R, Hua M, Yan Y, Zhao Y, Aukes D, He X. Tunable Sponge-Like Hierarchically Porous Hydrogels with Simultaneously Enhanced Diffusivity and Mechanical Properties. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008235. [PMID: 33829563 DOI: 10.1002/adma.202008235] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/07/2021] [Indexed: 06/12/2023]
Abstract
Crosslinked polymers and gels are important in soft robotics, solar vapor generation, energy storage, drug delivery, catalysis, and biosensing. However, their attractive mass transport and volume-changing abilities are diffusion-limited, requiring miniaturization to avoid slow response. Typical approaches to improving diffusion in hydrogels sacrifice mechanical properties by increasing porosity or limit the total volumetric flux by directionally confining the pores. Despite tremendous efforts, simultaneous enhancement of diffusion and mechanical properties remains a long-standing challenge hindering broader practical applications of hydrogels. In this work, cononsolvency photopolymerization is developed as a universal approach to overcome this swelling-mechanical property trade-off. The as-synthesized poly(N-isopropylacrylamide) hydrogel, as an exemplary system, presents a unique open porous network with continuous microchannels, leading to record-high volumetric (de)swelling speeds, almost an order of magnitude higher than reported previously. This swelling enhancement comes with a simultaneous improvement in Young's modulus and toughness over conventional hydrogels fabricated in pure solvents. The resulting fast mass transport enables in-air operation of the hydrogel via rapid water replenishment and ultrafast actuation. The method is compatible with 3D printing. The generalizability is demonstrated by extending the technique to poly(N-tertbutylacrylamide-co-polyacrylamide) and polyacrylamide hydrogels, non-temperature-responsive polymer systems, validating the present hypothesis that cononsolvency is a generic phenomenon driven by competitive adsorption.
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Affiliation(s)
- Yousif Alsaid
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Shuwang Wu
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Dong Wu
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Yingjie Du
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Lingxia Shi
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Roozbeh Khodambashi
- The Polytechnic School, Fulton School of Engineering, Arizona State University, Mesa, AZ, 85 212, USA
| | - Rossana Rico
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Mutian Hua
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Yichen Yan
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Yusen Zhao
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
| | - Daniel Aukes
- The Polytechnic School, Fulton School of Engineering, Arizona State University, Mesa, AZ, 85 212, USA
| | - Ximin He
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90 095, USA
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7
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Farokhi M, Aleemardani M, Solouk A, Mirzadeh H, Teuschl AH, Redl H. Crosslinking strategies for silk fibroin hydrogels: promising biomedical materials. Biomed Mater 2021; 16:022004. [PMID: 33594992 DOI: 10.1088/1748-605x/abb615] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Due to their strong biomimetic potential, silk fibroin (SF) hydrogels are impressive candidates for tissue engineering, due to their tunable mechanical properties, biocompatibility, low immunotoxicity, controllable biodegradability, and a remarkable capacity for biomaterial modification and the realization of a specific molecular structure. The fundamental chemical and physical structure of SF allows its structure to be altered using various crosslinking strategies. The established crosslinking methods enable the formation of three-dimensional (3D) networks under physiological conditions. There are different chemical and physical crosslinking mechanisms available for the generation of SF hydrogels (SFHs). These methods, either chemical or physical, change the structure of SF and improve its mechanical stability, although each method has its advantages and disadvantages. While chemical crosslinking agents guarantee the mechanical strength of SFH through the generation of covalent bonds, they could cause some toxicity, and their usage is not compatible with a cell-friendly technology. On the other hand, physical crosslinking approaches have been implemented in the absence of chemical solvents by the induction of β-sheet conformation in the SF structure. Unfortunately, it is not easy to control the shape and properties of SFHs when using this method. The current review discusses the different crosslinking mechanisms of SFH in detail, in order to support the development of engineered SFHs for biomedical applications.
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Affiliation(s)
- Maryam Farokhi
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran. Maryam Farokhi and Mina Aleemardani contributed equally
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8
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Eklund A, Zhang H, Zeng H, Priimagi A, Ikkala O. Fast Switching of Bright Whiteness in Channeled Hydrogel Networks. ADVANCED FUNCTIONAL MATERIALS 2020; 30:2000754. [PMID: 32684907 PMCID: PMC7357574 DOI: 10.1002/adfm.202000754] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/26/2020] [Accepted: 04/15/2020] [Indexed: 05/22/2023]
Abstract
Beside pigment absorption and reflection by periodic photonic structures, natural species often use light scattering to achieve whiteness. Synthetic hydrogels offer opportunities in stimuli-responsive materials and devices; however, they are not conventionally considered as ideal materials to achieve high whiteness by scattering due to the ill-defined porosities and the low refractive index contrast between the polymer and water. Herein, a poly(N-isopropylacrylamide) hydrogel network with percolated empty channels (ch-PNIPAm) is demonstrated to possess switchable bright whiteness upon temperature changes, obtained by removing the physical agarose gel in a semi-interpenetrating network of agarose and PNIPAm. The hydrogel is highly transparent at room temperature and becomes brightly white above 35 °C. Compared to conventional PNIPAm, the ch-PNIPAm hydrogel exhibits 80% higher reflectance at 800 nm and 18 times faster phase transition kinetics. The nanoscopic channels in the ch-PNIPAm facilitate water diffusion upon phase transition, thus enabling the formation of smaller pores and enhanced whiteness in the gel. Furthermore, fast photothermally triggered response down to tens of milliseconds can be achieved. This unique property of the ch-PNIPAm hydrogel to efficiently scatter visible light can be potentially used for, e.g., smart windows, optical switches, and, as demonstrated in this report, thermoresponsive color displays.
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Affiliation(s)
- Amanda Eklund
- Department of Applied PhysicsAalto UniversityP.O. Box 15100EspooFI 02150Finland
| | - Hang Zhang
- Department of Applied PhysicsAalto UniversityP.O. Box 15100EspooFI 02150Finland
| | - Hao Zeng
- Smart Photonic MaterialsFaculty of Engineering and Natural SciencesTampere UniversityP.O. Box 541TampereFI‐33101Finland
| | - Arri Priimagi
- Smart Photonic MaterialsFaculty of Engineering and Natural SciencesTampere UniversityP.O. Box 541TampereFI‐33101Finland
| | - Olli Ikkala
- Department of Applied PhysicsAalto UniversityP.O. Box 15100EspooFI 02150Finland
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9
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Pan Y, Li B, Liu Z, Yang Z, Yang X, Shi K, Li W, Peng C, Wang W, Ji X. Superfast and Reversible Thermoresponse of Poly( N-isopropylacrylamide) Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges. ACS APPLIED MATERIALS & INTERFACES 2018; 10:32747-32759. [PMID: 30157634 DOI: 10.1021/acsami.8b12395] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Poly( N-isopropylacrylamide) (PNIPAAm), a typical thermoresponsive polymer, exhibits potential application in smart materials. However, bulk PNIPAAm hydrogel monoliths undergo slow volume phase transition at least tens of minutes to hours as determined by the shape and size of polymers due to the formation of the skin layer. In this regard, novel macroporous sponges with rapid thermoresponse are prepared via grafting polymerization of N-isopropylacrylamide (NIPAAm) onto the macroporous poly(vinyl alcohol) formaldehyde (PVF) network as confirmed by attenuated total reflection-infrared (ATR IR) and 1H NMR spectra. As prepared PVF- g-PNIPAAm sponges display interconnected open-cell structures, and their average pore sizes and porosities are ∼90 μm and >85%, respectively. The equilibrium swelling ratio of PVF- g-PNIPAAm sponges varies from 11 to 50 with temperature. The volume phase transition temperature is at 30-34 °C, as detected in the DSC curves of swollen samples. These features indicate that the existence of the original PVF network exerts almost no influence on the PNIPAAm temperature responsibility. As prepared samples can reach the swelling equilibrium in less than 80 s, and their rapid swelling kinetics can be fitted using the pseudo-first-order rate kinetic equation. Notably, the samples also display rapid deswelling rate in less than 40 s at relative high temperature (48 °C), thereby indicating a superfast responsive behavior to temperature change. The PVF- g-PNIPAAm sponges exhibit rapid and reversible thermoresponse in repeatable swelling-deswelling cycles, which can satisfy the need of special smart materials. In particular, combined with iodine solution (i.e., PVF- g-PNIPAAm/I2), these sponges can serve as a novel temperature indicator and exhibit excellent antibacterial performances.
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Affiliation(s)
- Yanxiong Pan
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Bingrui Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Zhi Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Zhongyu Yang
- Department of Chemistry and Biochemistry , North Dakota State University , Fargo , North Dakota 58108 , United States
| | - Xu Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Kai Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Wei Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Chao Peng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Weicai Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
| | - Xiangling Ji
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun 130022 , P. R. China
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10
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Li H, Liu K, Williams GR, Wu J, Wu J, Wang H, Niu S, Zhu LM. Dual temperature and pH responsive nanofiber formulations prepared by electrospinning. Colloids Surf B Biointerfaces 2018; 171:142-149. [PMID: 30025376 DOI: 10.1016/j.colsurfb.2018.07.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 06/21/2018] [Accepted: 07/10/2018] [Indexed: 10/28/2022]
Abstract
We report a dual-responsive drug delivery system prepared by electrospinning. Blend fibers of poly(N-vinylcaprolactam) (PNVCL) and ethyl cellulose (EC) were first prepared, with the aim of developing thermoresponsive sustained release formulations. Eudragit L100-based fibers were then generated to yield pH-sensitive materials. Attempts to produce three-polymer fibers of EC, PNVCL and Eudragit were unsuccessful, and therefore hybrid mats containing two fiber populations (one made of PNVCL/EC, one comprising Eudragit) were instead fabricated by twin-jet electrospinning. Analogous drug-loaded versions of all the formulations were also prepared containing ketoprofen (KET). The fibers were largely smooth and homogeneous, and the addition of KET did not affect their morphology. The PNVCL-containing fiber mats changed from being hydrophilic to hydrophobic when the temperature was increased through the lower critical solution temperature of 33 °C. In vitro drug release profiles showed that the hybrid fiber mats were able to combine the properties of the three polymers, exhibiting both pH-sensitive and thermosensitive properties with sustained release. In addition, they were found to be nontoxic and suitable for cell growth. This study therefore demonstrates that PNVCL/EC/KET-Eudragit/KET multicomponent fiber mats comprise effective and biocompatible materials for targeted drug delivery.
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Affiliation(s)
- Heyu Li
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Kailin Liu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Gareth R Williams
- UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK.
| | - Junzi Wu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Jianrong Wu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Haijun Wang
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Shiwei Niu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China
| | - Li-Min Zhu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China; Key Lab of Science & Technology of Eco-Textiles, Ministry of Education, Donghua University, China.
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11
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Antibody loaded collapsible hyaluronic acid hydrogels for intraocular delivery. Eur J Pharm Biopharm 2018; 124:95-103. [DOI: 10.1016/j.ejpb.2017.12.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/21/2017] [Accepted: 12/29/2017] [Indexed: 10/18/2022]
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12
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Pereira RFP, Brito-Pereira R, Gonçalves R, Silva MP, Costa CM, Silva MM, de Zea Bermudez V, Lanceros-Méndez S. Silk Fibroin Separators: A Step Toward Lithium-Ion Batteries with Enhanced Sustainability. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5385-5394. [PMID: 29369609 DOI: 10.1021/acsami.7b13802] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Battery separators based on silk fibroin (SF) have been prepared aiming at improving the environmental issues of lithium-ion batteries. SF materials with three different morphologies were produced: membrane films (SF-F), sponges prepared by lyophilization (SF-L), and electrospun membranes (SF-E). The latter materials presented a suitable porous three-dimensional microstructure and were soaked with a 1 M LiPF6 electrolyte. The ionic conductivities for SF-L and SF-E were 1.00 and 0.32 mS cm-1 at 20 °C, respectively. A correlation between the fraction of β-sheet conformations and the ionic conductivity was observed. The electrochemical performance of the SF-based materials was evaluated by incorporating them in cathodic half-cells with C-LiFePO4. The discharge capacities of SF-L and SF-E were 126 and 108 mA h g-1, respectively, at the C/2-rate and 99 and 54 mA h g-1, respectively, at the 2C-rate. Furthermore, the capacity retention and capacity fade of the SF-L membrane after 50 cycles at the 2C-rate were 72 and 5%, respectively. These electrochemical results show that a high percentage of β-sheet conformations were of prime importance to guarantee excellent cycling performance. This work demonstrates that SF-based membranes are appropriate separators for the production of environmentally friendlier lithium-ion batteries.
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Affiliation(s)
- Rui F P Pereira
- Departamento de Química, Universidade de Trás-os-Montes e Alto Douro , 5001-801 Vila Real, Portugal
| | | | | | - Marco P Silva
- C-MAST-Centre for Mechanical and Aerospace Science and Technologies, Universidade da Beira Interior , 6200-001 Covilhã, Portugal
| | | | | | - Verónica de Zea Bermudez
- Departamento de Química, Universidade de Trás-os-Montes e Alto Douro , 5001-801 Vila Real, Portugal
- CQ-VR Universidade de Trás-os-Montes e Alto Douro , 5001-801 Vila Real, Portugal
| | - Senentxu Lanceros-Méndez
- BCMaterials, Parque Científico y Tecnológico de Bizkaia , 48160 Derio, Spain
- IKERBASQUE, Basque Foundation for Science , Bilbao 48013, Spain
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13
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Fabrication of Hydrogel Materials for Biomedical Applications. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:197-224. [PMID: 30357691 DOI: 10.1007/978-981-13-0947-2_12] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Hydrogels are three-dimensional hydrophilic polymeric networks that can be made from a wide range of natural and synthetic polymers. This review discusses recent advanced engineering methods to fabricate hydrogels for biomedical applications with emphasis in cardiac constructs and wound healing. Layer-by-Layer (LbL) assembly offers a tissue-engineered construct with robust and highly ordered structures for cell proliferation and differentiation. Three-dimensional printings, including inkjet printing, fused deposition modeling, and stereolithographic apparatus, have been widely employed to fabricate complex structures (e.g., heart valves). Moreover, the state-of-the-art design of intelligent/stimulus-responsive hydrogels can be used for a wide range of biomedical applications, including drug delivery, glucose delivery, shape memory, wound dressings, and so on. In the future, an increasing number of hydrogels with tunable mechanical properties and versatile functions will be developed for biomedical applications by employing advanced engineering techniques with novel material design.
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Sultan MT, Lee OJ, Kim SH, Ju HW, Park CH. Silk Fibroin in Wound Healing Process. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:115-126. [DOI: 10.1007/978-981-13-0947-2_7] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Orakdogen N, Boyaci T. Finite extensibility and deviation from Gaussian elasticity of dimethylacrylamide-based gels with different charge density: Insight into pH/solvent-dependent swelling and surfactant interactions. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Kang B, Vales TP, Cho BK, Kim JK, Kim HJ. Development of Gallic Acid-Modified Hydrogels Using Interpenetrating Chitosan Network and Evaluation of Their Antioxidant Activity. Molecules 2017; 22:E1976. [PMID: 29140278 PMCID: PMC6150364 DOI: 10.3390/molecules22111976] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 11/04/2017] [Accepted: 11/13/2017] [Indexed: 02/07/2023] Open
Abstract
In this work, antioxidant hydrogels were prepared by the construction of an interpenetrating chitosan network and functionalization with gallic acid. The poly(2-hydroxyethyl methacrylate) p(HEMA)-based hydrogels were first synthesized and subsequently surface-modified with an interpenetrating polymer network (IPN) structure prepared with methacrylamide chitosan via free radical polymerization. The resulting chitosan-IPN hydrogels were surface-functionalized with gallic acid through an amide coupling reaction, which afforded the antioxidant hydrogels. Notably, gallic-acid-modified hydrogels based on a longer chitosan backbone exhibited superior antioxidant activity than their counterpart with a shorter chitosan moiety; this correlated to the amount of gallic acid attached to the chitosan backbone. Moreover, the surface contact angles of the chitosan-modified hydrogels decreased, indicating that surface functionalization of the hydrogels with chitosan-IPN increased the wettability because of the presence of the hydrophilic chitosan network chain. Our study indicates that chitosan-IPN hydrogels may facilitate the development of applications in biomedical devices and ophthalmic materials.
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Affiliation(s)
- Byungman Kang
- Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute, 989-111 Daedeok-daero, Yuseong-gu, Daejeon 34057, Korea.
| | - Temmy Pegarro Vales
- Department of Chemistry, Chosun University, Gwangju 61452, Korea.
- Department of Natural Sciences, Caraga State University, Butuan City 8600, Philippines.
| | - Byoung-Ki Cho
- Department of Chemistry, Dankook University, 119, Dandae-ro, Chungnam 31116, Korea.
| | - Jong-Ki Kim
- Department of Biomedical Engineering, School of Medicine, Catholic University of Daegu, Daegu 42472, Korea.
| | - Ho-Joong Kim
- Department of Chemistry, Chosun University, Gwangju 61452, Korea.
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17
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A thermosensitive drug delivery system prepared by blend electrospinning. Colloids Surf B Biointerfaces 2017; 159:277-283. [PMID: 28802202 DOI: 10.1016/j.colsurfb.2017.07.058] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 07/18/2017] [Accepted: 07/24/2017] [Indexed: 11/22/2022]
Abstract
In this study, the thermosensitive polymer poly(di(ethylene glycol) methyl ether methacrylate) (PDEGMA) was synthesized and electrospun into fibers by blending with ethyl cellulose (EC). Fibers were additionally prepared loaded with ketoprofen (KET) as a model drug. Smooth cylindrical fibers could generally be observed by electron microscopy, although there were some beads and fused fibers visible in the KET-loaded materials. KET was found to be amorphously distributed in the fibers on the basis of X-ray diffraction data. From water contact angle measurements, it was clear that the wettability of the EC/PDEGMA systems changed as the temperature increased, with the fibers becoming markedly more hydrophobic. In vitro drug release studies showed that KET was released over a prolonged period of time with the fibers having different profiles at 25 and 37°C, reflecting their thermosensitive properties. Furthermore, the materials were found to have good biocompatibility towards L929 fibroblasts. Thus, the fibers prepared in this work have potential as smart stimuli-responsive drug delivery systems.
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18
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Tao G, Cai R, Wang Y, Song K, Guo P, Zhao P, Zuo H, He H. Biosynthesis and Characterization of AgNPs-Silk/PVA Film for Potential Packaging Application. MATERIALS 2017; 10:ma10060667. [PMID: 28773026 PMCID: PMC5554048 DOI: 10.3390/ma10060667] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 06/06/2017] [Accepted: 06/13/2017] [Indexed: 02/06/2023]
Abstract
Bionanocomposite packaging materials have a bright future for a broad range of applications in the food and biomedical industries. Antimicrobial packaging is one of the bionanocomposite packaging materials. Silver nanoparticle (AgNP) is one of the most attractive antimicrobial agents for its broad spectrum of antimicrobial activity against microorganisms. However, the traditional method of preparing AgNPs-functionalized packaging material is cumbersome and not environmentally friendly. To develop an efficient and convenient biosynthesis method to prepare AgNPs-modified bionanocomposite material for packaging applications, we synthesized AgNPs in situ in a silk fibroin solution via the reduction of Ag⁺ by the tyrosine residue of fibroin, and then prepared AgNPs-silk/poly(vinyl alcohol) (PVA) composite film by blending with PVA. AgNPs were synthesized evenly on the surface or embedded in the interior of silk/PVA film. The prepared AgNPs-silk/PVA film exhibited excellent mechanical performance and stability, as well as good antibacterial activity against both Gram-negative and Gram-positive bacteria. AgNPs-silk/PVA film offers more choices to be potentially applied in the active packaging field.
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Affiliation(s)
- Gang Tao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Rui Cai
- College of Biotechnology, Southwest University, Chongqing 400715, China.
| | - Yejing Wang
- College of Biotechnology, Southwest University, Chongqing 400715, China.
| | - Kai Song
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Pengchao Guo
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Hua Zuo
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
| | - Huawei He
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Southwest University, Chongqing 400715, China.
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19
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Biswas CS, Wang Q, Galluzzi M, Wu Y, Navale ST, Du B, Stadler FJ. Versatile Mechanical and Thermoresponsive Properties of Macroporous Copolymer Gels. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600554] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Chandra Sekhar Biswas
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
- Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; 518060 Shenzhen P. R. China
| | - Qiao Wang
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
| | - Massimiliano Galluzzi
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
- Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; 518060 Shenzhen P. R. China
| | - Yuhang Wu
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
| | - Sachin T. Navale
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
- Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province; College of Optoelectronic Engineering; Shenzhen University; 518060 Shenzhen P. R. China
| | - Bing Du
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
| | - Florian J. Stadler
- College of Materials Science and Engineering; Shenzhen Key Laboratory of Polymer Science and Technology; Guangdong Research Center for Interfacial Engineering of Functional Materials; Nanshan District Key Lab for Biopolymers and Safety Evaluation; Shenzhen University; 518060 Shenzhen P. R. China
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20
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Brown JE, Moreau JE, Berman AM, McSherry HJ, Coburn JM, Schmidt DF, Kaplan DL. Shape Memory Silk Protein Sponges for Minimally Invasive Tissue Regeneration. Adv Healthc Mater 2017; 6:10.1002/adhm.201600762. [PMID: 27863133 PMCID: PMC5266640 DOI: 10.1002/adhm.201600762] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 08/30/2016] [Indexed: 12/20/2022]
Abstract
Porous silk protein scaffolds are designed to display shape memory characteristics and volumetric recovery following compression. Two strategies are utilized to realize shape recovery: addition of hygroscopic plasticizers like glycerol, and tyrosine modifications with hydrophilic sulfonic acid chemistries. Silk sponges are evaluated for recovery following 80% compressive strain, total porosity, pore size distribution, secondary structure development, in vivo volume retention, cell infiltration, and inflammatory responses. Glycerol-modified sponges recover up to 98.3% of their original dimensions following compression, while sulfonic acid/glycerol modified sponges swell in water up to 71 times their compressed volume, well in excess of their original size. Longer silk extraction times (lower silk molecular weights) and higher glycerol concentrations yielded greater flexibility and shape fidelity, with no loss in modulus following compression. Sponges are over 95% porous, with secondary structure analysis indicating glycerol-induced β-sheet physical crosslinking. Tyrosine modifications with sulfonic acid interfere with β-sheet formation. Glycerol-modified sponges exhibit improved rates of cellular infiltration at subcutaneous implant sites with minimal immune response in mice. They also degrade more rapidly than unmodified sponges, a result posited to be cell-mediated. Overall, this work suggests that silk sponges may be useful for minimally invasive deployment in soft tissue augmentation procedures.
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Affiliation(s)
- Joseph E. Brown
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155
| | - Jodie E. Moreau
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155
| | - Alison M. Berman
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155
| | | | - Jeannine M. Coburn
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155
| | - Daniel F. Schmidt
- Department of Plastics Engineering, University of Massachusetts Lowell, Lowell, MA, 01854
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155
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21
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Li H, Williams GR, Wu J, Lv Y, Sun X, Wu H, Zhu LM. Thermosensitive nanofibers loaded with ciprofloxacin as antibacterial wound dressing materials. Int J Pharm 2017; 517:135-147. [DOI: 10.1016/j.ijpharm.2016.12.008] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 11/17/2016] [Accepted: 12/05/2016] [Indexed: 10/20/2022]
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22
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Wang Q, Biswas CS, Galluzzi M, Wu Y, Du B, Stadler FJ. Random copolymer gels of N-isopropylacrylamide and N-ethylacrylamide: effect of synthesis solvent compositions on their properties. RSC Adv 2017. [DOI: 10.1039/c6ra27348c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Random copolymer gels of N-isopropylacrylamide (NIPAM) and N-ethylacrylamide (NEAM) were synthesized using 1 : 1 monomer molar ratio in different methanol–water mixtures. (xm = 0, 0.06, 0.13, 0.21, 0.31 0.43, 0.57, 0.76, where xm = mole fraction of methanol) (xm = 0, 0.06, 0.13, 0.21, 0.31, 0.43, 0.57, 0.76, where xm = mole fraction of methanol).
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Affiliation(s)
- Qiao Wang
- College of Materials Science and Engineering
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen University
| | - Chandra Sekhar Biswas
- College of Materials Science and Engineering
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen University
| | - Massimiliano Galluzzi
- College of Materials Science and Engineering
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen University
| | - Yuhang Wu
- College of Materials Science and Engineering
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen University
| | - Bing Du
- College of Materials Science and Engineering
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen University
| | - Florian. J. Stadler
- College of Materials Science and Engineering
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen University
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23
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Surface Morphology at the Microscopic Scale, Swelling/Deswelling, and the Magnetic Properties of PNIPAM/CMC and PNIPAM/CMC/Fe₃O₄ Hydrogels. Gels 2016; 2:gels2040030. [PMID: 30674160 PMCID: PMC6318666 DOI: 10.3390/gels2040030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/29/2016] [Accepted: 12/05/2016] [Indexed: 11/25/2022] Open
Abstract
Poly(N-isopropylacrylamide) (PNIPAM) hydrogels containing carboxymethylcellulose (CMC) and CMC/Fe3O4 nanoparticles were prepared. Free-radical polymerization with BIS as cross-linker was used to synthesize the hydrogels. The morphology at the microscopic scale of these materials was investigated using field emission scanning electron microscopy (FESEM). The images show that CMC in the PNIPAM hydrogels induces the formation of a honeycomb structure. This surface morphology was not observed for pure PNIPAM hydrogels prepared under similar conditions. The equilibrium swelling degree of the PNIPAM/CMC hydrogels (5200%) is much larger than that of the pure PNIPAM hydrogels (2500%). The water retention of PNIPAM/CMC hydrogels above the volume phase transition temperature is strongly reduced compared to that of pure PNIPAM hydrogel. Both PNIPAM/Fe3O4 and PNIPAM/CMC/Fe3O4 hydrogels exhibit a superparamagnetic behavior, but the blocking temperature (104 K) of the former is higher than that of the latter (83 K).
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24
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Haq MA, Su Y, Wang D. Mechanical properties of PNIPAM based hydrogels: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:842-855. [PMID: 27770962 DOI: 10.1016/j.msec.2016.09.081] [Citation(s) in RCA: 295] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/13/2016] [Accepted: 09/29/2016] [Indexed: 11/26/2022]
Abstract
Materials which adjust their properties in response to environmental factors such as temperature, pH and ionic strength are rapidly evolving and known as smart materials. Hydrogels formed by smart polymers have various applications. Among the smart polymers, thermoresponsive polymer poly(N-isopropylacrylamide)(PNIPAM) is very important because of its well defined structure and property specially its temperature response is closed to human body and can be finetuned as well. Mechanical properties are critical for the performance of stimuli responsive hydrogels in diverse applications. However, native PNIPAM hydrogels are very fragile and hardly useful for any practical purpose. Intense researches have been done in recent decade to enhance the mechanical features of PNIPAM hydrogel. In this review, several strategies including interpenetrating polymer network (IPN), double network (DN), nanocomposite (NC) and slide ring (SR) hydrogels are discussed in the context of PNIPAM hydrogel.
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Affiliation(s)
- Muhammad Abdul Haq
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; Laboratory of Food Engineering, Department of Food Science & Technology, University of Karachi, Karachi, Pakistan
| | - Yunlan Su
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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25
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Whittaker JL, Dutta NK, Zannettino A, Choudhury NR. Engineering DN hydrogels from regenerated silk fibroin and poly(N-vinylcaprolactam). J Mater Chem B 2016; 4:5519-5533. [PMID: 32263350 DOI: 10.1039/c6tb01055e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The development of novel hydrogels that possess adequate elasticity and toughness to withstand mechanically active environments, along with being biocompatible, remains a significant challenge in the design of materials for tissue engineering applications. In this study, a family of regenerated silk fibroin (RSF) based double network (DN) hydrogels were fabricated for the first time using a rapid one-pot method. The DN hydrogels combine the rigid covalently crosslinked RSF with the softer poly(N-vinylcaprolactam) (PVCL) through strong physical interactions. The formation of these DN hydrogels resulted in an improvement of the water uptake capacity, elasticity and toughness compared to the individual RSF hydrogel. The elasticity of the RSF/PVCL DN hydrogels was closer to that of native cartilage, which makes them promising materials for cartilage regeneration applications. An in vitro study on adhesion, proliferation and differentiation of a mouse pre-chondrocyte cell line (ATDC5) conducted using microscopic analysis, a cell proliferation assay and RT-PCR confirmed the cells cultured on the less stiff hydrogels demonstrated the most favourable chondrogenic response. Thus, this study demonstrates the potential of RSF-based hybrid hydrogels for cartilage tissue engineering applications.
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Affiliation(s)
- Jasmin L Whittaker
- Future Industries Institute, Mawson Lakes Campus, University of South Australia, Mawson Lakes, Adelaide, SA 5095, Australia.
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26
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Kapoor S, Kundu SC. Silk protein-based hydrogels: Promising advanced materials for biomedical applications. Acta Biomater 2016; 31:17-32. [PMID: 26602821 DOI: 10.1016/j.actbio.2015.11.034] [Citation(s) in RCA: 274] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 11/08/2015] [Accepted: 11/17/2015] [Indexed: 01/20/2023]
Abstract
Hydrogels are a class of advanced material forms that closely mimic properties of the soft biological tissues. Several polymers have been explored for preparing hydrogels with structural and functional features resembling that of the extracellular matrix. Favourable material properties, biocompatibility and easy processing of silk protein fibers into several forms make it a suitable material for biomedical applications. Hydrogels made from silk proteins have shown a potential in overcoming limitations of hydrogels prepared from conventional polymers. A great deal of effort has been made to control the properties and to integrate novel topographical and functional characteristics in the hydrogel composed from silk proteins. This review provides overview of the advances in silk protein-based hydrogels with a primary emphasis on hydrogels of fibroin. It describes the approaches used to fabricate fibroin hydrogels. Attempts to improve the existing properties or to incorporate new features in the hydrogels by making composites and by improving fibroin properties by genetic engineering approaches are also described. Applications of the fibroin hydrogels in the realms of tissue engineering and controlled release are reviewed and their future potentials are discussed. STATEMENT OF SIGNIFICANCE This review describes the potentiality of silk fibroin hydrogel. Silk Fibroin has been widely recognized as an interesting biomaterial. Due to its properties including high mechanical strength and excellent biocompatibility, it has gained wide attention. Several groups are exploring silk-based materials including films, hydrogels, nanofibers and nanoparticles for different biomedical applications. Although there is a good amount of literature available on general properties and applications of silk based biomaterials, there is an inadequacy of extensive review articles that specifically focus on silk based hydrogels. Silk-based hydrogels have a strong potential to be utilized in biomedical applications. Our work is an effort to highlight the research that has been done in the area of silk-based hydrogels. It aims to provide an overview of the advances that have been made and the future course available. It will provide an overview of the silk-based hydrogels as well as may direct the readers to the specific areas of application.
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27
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Qi X, Wei W, Li J, Liu Y, Hu X, Zhang J, Bi L, Dong W. Fabrication and Characterization of a Novel Anticancer Drug Delivery System: Salecan/Poly(methacrylic acid) Semi-interpenetrating Polymer Network Hydrogel. ACS Biomater Sci Eng 2015; 1:1287-1299. [PMID: 33429676 DOI: 10.1021/acsbiomaterials.5b00346] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Salecan is a novel linear extracellular polysaccharide with a linear backbone of 1-3-linked glucopyranosyl units. Salecan is suitable for preparing hydrogels for biomedical applications due to its prominent physicochemical and biological profiles. In this contribution, a variety of innovative semi-interpenetrating polymer network (semi-IPN) hydrogels consisting of Salecan and poly(methacrylic acid) (PMAA) were developed via free radical polymerization for controlled drug delivery. The successful fabrication of the semi-IPNs was verified by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and thermogravimetric (TGA) measurements. Scanning electron microscopy (SEM) and rheology analyses demonstrated that the morphological and mechanical behaviors of the resultant hydrogels were strongly affected by the contents of Salecan and cross-linker N,N'-methylenebis(acrylamide) (BIS). Moreover, the swelling properties of these hydrogels were systematically investigated, and the results indicated that they exhibited pH sensitivity. The drug delivery applications of such fabricated hydrogels were further evaluated from which doxorubicin (Dox) was chosen as a model drug for in vitro release and cell viability studies. It was found that the Dox release from the Dox-loaded hydrogels was significantly accelerated when the pH of the release media decreased from 7.4 to 5.0. Toxicity assays confirmed that the blank hydrogels had negligible toxicity to normal cells, whereas the Dox-loaded hydrogels remained high in cytotoxicity for A549 and HepG2 cancer cells. All of these attributes implied that the new proposed semi-IPNs serve as potential drug delivery platforms for cancer therapy.
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Affiliation(s)
- Xiaoliang Qi
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Wei Wei
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Junjian Li
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Yucheng Liu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Xinyu Hu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Jianfa Zhang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
| | - Lirong Bi
- The First Bethune Hospital of Jilin University, ChangChun 130000, China
| | - Wei Dong
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China
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Jiang Y, Wu Y, Huo Y. Thermo-responsive hydrogels withN-isopropylacrylamide/acrylamide interpenetrating networks for controlled drug release. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:917-30. [DOI: 10.1080/09205063.2015.1068532] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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A novel thermo-responsive hydrogel based on salecan and poly(N-isopropylacrylamide): Synthesis and characterization. Colloids Surf B Biointerfaces 2015; 125:1-11. [DOI: 10.1016/j.colsurfb.2014.10.057] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 09/19/2014] [Accepted: 10/28/2014] [Indexed: 11/19/2022]
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30
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Nara S, Chameettachal S, Midha S, Singh H, Tandon R, Mohanty S, Ghosh S. Strategies for faster detachment of corneal cell sheet using micropatterned thermoresponsive matrices. J Mater Chem B 2015; 3:4155-4169. [DOI: 10.1039/c5tb00350d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Direct write assembly of parallel patterns of gelatin–poly(N-isopropylacrylamide) hybrids serve as suitable thermoresponsive material to develop patterned cell sheets of functional keratocytes for constructing a bioequivalent of corneal stroma.
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Affiliation(s)
- Sharda Nara
- Department of Textile Technology
- Indian Institute of Technology
- New Delhi
- India
| | - Shibu Chameettachal
- Department of Textile Technology
- Indian Institute of Technology
- New Delhi
- India
| | - Swati Midha
- Department of Textile Technology
- Indian Institute of Technology
- New Delhi
- India
| | - Himi Singh
- Stem Cell Facility
- All India Institute of Medical Sciences
- New Delhi
- India
| | - Radhika Tandon
- Rajendra Prasad Centre for Ophthalmic Sciences
- All India Institute of Medical Sciences
- New Delhi
- India
| | - Sujata Mohanty
- Stem Cell Facility
- All India Institute of Medical Sciences
- New Delhi
- India
| | - Sourabh Ghosh
- Department of Textile Technology
- Indian Institute of Technology
- New Delhi
- India
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31
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Guo J, Pan S, Yin X, He YF, Li T, Wang RM. pH-sensitive keratin-based polymer hydrogel and its controllable drug-release behavior. J Appl Polym Sci 2014. [DOI: 10.1002/app.41572] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Juhua Guo
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou 730070 China
| | - Sujuan Pan
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou 730070 China
| | - Xiaochun Yin
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou 730070 China
| | - Yu-Feng He
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou 730070 China
| | - Tao Li
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou 730070 China
| | - Rong-Min Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou 730070 China
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32
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Maslovskis A, Guilbaud JB, Grillo I, Hodson N, Miller AF, Saiani A. Self-assembling peptide/thermoresponsive polymer composite hydrogels: effect of peptide-polymer interactions on hydrogel properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10471-80. [PMID: 25095719 DOI: 10.1021/la502358b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We have investigated the effect of doping the self-assembling octapeptide FEFEFKFK (F, phenylalanine; E, glutamic acid; K, lysine) hydrogels with various amounts of thermoresponsive conjugate of FEFEFKFK and poly(N-isopropylacrylamide) (PNIPAAm) in order to create novel hydrogels. The samples were characterized using a range of techniques including microdifferential scanning calorimetry (μDSC), oscillatory rheology, transmission electron microscopy (TEM), atomic force microscopy (AFM), and small angle neutron scattering (SANS). The peptide from the conjugate was shown to be incorporated into the peptide fiber, resulting in the polymer being anchored to the peptide fiber. The conjugation of the polymer to the peptide and its anchoring to the peptide fibers did not affect its lower critical solution temperature (LCST). On the other hand, it did result in a decrease in the LCST enthalpy and a significant increase in the G' of the hydrogels, suggesting the presence of hydrogen bond interactions between the peptide and the polymer. As a result, the polymer was found to adopt a fibrillar arrangement tightly covering the peptide fiber. The polymer was still found to go through a conformational change at the LCST, suggesting that it collapses onto the peptide fiber. On the other hand, the fibrillar network was found to be mainly unaffected by the polymer LCST. These changes at the LCST were also found to be fully reversible. The nature of the interaction between the polymer and the peptide was shown to have a significant effect on the conformation adopted by the polymer around the fibers and the mechanical properties of the hydrogels.
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Affiliation(s)
- A Maslovskis
- Manchester Institute of Biotechnology and School of Chemical Engineering & Analytical Science, The University of Manchester , Oxford Road, Manchester, M13 9PL, U.K
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Park HY, Kim YS, Choi SH. Preparation of cross-linked silk fibroin film by γ-irradiation and their application as supports for human cell culture. ANALYTICAL SCIENCE AND TECHNOLOGY 2014. [DOI: 10.5806/ast.2014.27.1.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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A novel fabrication method of temperature-responsive poly(acrylamide) composite hydrogel with high mechanical strength. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.08.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Vashist A, Shahabuddin S, Gupta YK, Ahmad S. Polyol induced interpenetrating networks: chitosan–methylmethacrylate based biocompatible and pH responsive hydrogels for drug delivery system. J Mater Chem B 2013; 1:168-178. [DOI: 10.1039/c2tb00021k] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Parmar AS, Hill S, Vidyasagar A, Bello C, Toomey R, Muschol M. Frequency and temperature dependence of poly(N-isopropylacrylamide) gel rheology. J Appl Polym Sci 2012. [DOI: 10.1002/app.37561] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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Kundu J, Poole-Warren LA, Martens P, Kundu SC. Silk fibroin/poly(vinyl alcohol) photocrosslinked hydrogels for delivery of macromolecular drugs. Acta Biomater 2012; 8:1720-9. [PMID: 22285428 DOI: 10.1016/j.actbio.2012.01.004] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 12/22/2011] [Accepted: 01/05/2012] [Indexed: 01/13/2023]
Abstract
Hydrogels are three-dimensional polymer networks widely used in biomedical applications as drug delivery and tissue engineered scaffolds to effectively repair or replace damaged tissue. In this paper we demonstrate a newly synthesized cytocompatible and drug releasing photo-crosslinked hydrogel based on poly(vinyl alcohol) methacrylate and silk fibroin which possesses tailorable structural and biological properties. The initial silk fibroin content was 0%, 10%, 20%, 30%, 40% and 50% with respect to the weight of poly(vinyl alcohol) methacrylate. The prepared hydrogels were characterized with respect to morphology, crystallinity, stability, swelling, mass loss and cytotoxicity. FITC-dextrans of different molecular weights were chosen as model drugs molecules for release studies from the hydrogels. The hydrogels containing different silk fibroin percentages showed differences in pore size and distribution. X-ray diffraction analysis revealed that amorphous silk fibroin in poly(vinyl alcohol) methacrylate is crystallized to β-sheet secondary structure upon gelation. The sol fraction increased with increasing fibroin concentration in the co-polymer gel (from 18% to 45%), although the hydrogel extracts were non-cytotoxic. Similarly, the addition of silk fibroin increased water uptake by the gels (from 7% to 21%). FITC-dextran release from the hydrogels was dependent on the silk fibroin content and the molecular weight of encapsulated molecules. The study outlines a newer type of photo-crosslinked interpenetrating polymer network hydrogel that possess immense potential in drug delivery applications.
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Affiliation(s)
- Joydip Kundu
- Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
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38
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The effect of hydration on molecular chain mobility and the viscoelastic behavior of resilin-mimetic protein-based hydrogels. Biomaterials 2011; 32:8462-73. [DOI: 10.1016/j.biomaterials.2011.07.064] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 07/20/2011] [Indexed: 11/23/2022]
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39
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40
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Liu Y, Cui Y. Preparation and properties of temperature-sensitive soy protein/poly(N
-isopropylacrylamide) interpenetrating polymer network hydrogels. POLYM INT 2011. [DOI: 10.1002/pi.3050] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Liu Y, Cui Y. Thermosensitive soy protein/poly(n-isopropylacrylamide) interpenetrating polymer network hydrogels for drug controlled release. J Appl Polym Sci 2011. [DOI: 10.1002/app.33535] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Gil ES, Park SH, Tien LW, Trimmer B, Hudson SM, Kaplan DL. Mechanically robust, rapidly actuating, and biologically functionalized macroporous poly(N-isopropylacrylamide)/silk hybrid hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15614-24. [PMID: 20804220 DOI: 10.1021/la102509a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A route toward mechanically robust, rapidly actuating, and biologically functionalized polymeric actuators using macroporous soft materials is described. The materials were prepared by combining silk protein and a synthetic polymer (poly(N-isopropylacrylamide) (PNIAPPm)) to form interpenetrating network materials and macroporous structures by freeze-drying, with hundreds of micrometer diameter pores and exploiting the features of both polymers related to dynamic materials and structures. The chemically cross-linked PNIPAAm networks provided stimuli-responsive features, while the silk interpenetrating network formed by inducing protein β-sheet crystallinity in situ for physical cross-links provided material robustness, improved expansion force, and enzymatic degradability. The macroporous hybrid hydrogels showed enhanced thermal-responsive properties in comparison to pure PNIPAAm hydrogels, nonporous silk/PNIPAAm hybrid hydrogels, and previously reported macroporous PNIPAAm hydrogels. These new systems reach near equilibrium sizes in shrunken/swollen states in less than 1 min, with the structural features providing improved actuation rates and stable oscillatory properties due to the macroporous transport and the mechanically robust silk network. Confocal images of the hydrated hydrogels around the lower critical solution temperature (LCST) revealed macropores that could be used to track changes in the real time morphology upon thermal stimulus. The material system transformed from a macroporous to a nonporous structure upon enzymatic degradation. To extend the utility of the system, an affinity platform for a switchable or tunable system was developed by immobilizing biotin and avidin on the macropore surfaces.
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Affiliation(s)
- Eun Seok Gil
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
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43
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Recent advances in hydrogels in terms of fast stimuli responsiveness and superior mechanical performance. Polym J 2010. [DOI: 10.1038/pj.2010.87] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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44
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Yao B, Chen ZW, Ni C, Ni ZB, Liu XY, Chen MQ. Studies on syntheses and dynamic swelling of pH-sensitive macroporous poly(N-isopropylacrylamide-co-acrylic acid) hydrogels. POLYMER SCIENCE SERIES A 2010. [DOI: 10.1134/s0965545x10010037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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45
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Santos JR, Alves NM, Mano JF. New Thermo-responsive Hydrogels Based on Poly (N-isopropylacrylamide)/ Hyaluronic Acid Semi-interpenetrated Polymer Networks: Swelling Properties and Drug Release Studies. J BIOACT COMPAT POL 2010. [DOI: 10.1177/0883911509357863] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
New pH and temperature sensitive semi-interpenetrated polymer networks (semi-IPNs) were developed by combining cross-linked PNIPAAm with hyaluronic acid (HA). At pH 7.4, the PNIPAAm/HA semi-IPN hydrogels had significantly greater and faster swelling at 25°C and a more complete deswelling at 37°C than PNIPAAm hydrogels. The temperature-dependent reversibility behavior was analyzed for biomaterial applications. Gentamicin was incorporated as a model drug, and the release profile from the hydrogels was followed under physiological conditions. The presence of HA, even in small quantities, allowed a more complete release of the gentamicin from the hydrogel. The PNIPAAm/HA semi-IPN hydrogels respond to both changes in temperature and pH making it suitable as a delivery system for therapeutics.
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Affiliation(s)
- João R. Santos
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics AvePark, Zona Industrial da Gandra, S. Cláudio do Barco 4806-909 Caldas das Taipas - Guimarães, Portugal, IBB - Institute for Biotechnology and Bioengineering PT Government Associated Laboratory, Guimarães, Portugal
| | - Natália M. Alves
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics AvePark, Zona Industrial da Gandra, S. Cláudio do Barco 4806-909 Caldas das Taipas - Guimarães, Portugal, IBB - Institute for Biotechnology and Bioengineering PT Government Associated Laboratory, Guimarães, Portugal
| | - João F. Mano
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics AvePark, Zona Industrial da Gandra, S. Cláudio do Barco 4806-909 Caldas das Taipas - Guimarães, Portugal, IBB - Institute for Biotechnology and Bioengineering PT Government Associated Laboratory, Guimarães, Portugal,
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46
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Reis BM, Armes SP, Fujii S, Biggs S. Characterisation of the dispersion stability of a stimulus responsive core–shell colloidal latex. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.11.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Mohamed R, Choudhary V, Koul V. Synthesis and characterization of biodegradable interpenetrating polymer networks based on gelatin and divinyl ester synthesized from poly(caprolactone diol). J Appl Polym Sci 2009. [DOI: 10.1002/app.28907] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Xiao C, Tian H, Zhuang X, Chen X, Jing X. Recent developments in intelligent biomedical polymers. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11426-008-0151-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Li B, Jiang Y, Liu Y, Wu Y, Yu H, Zhu M. Novel poly(N
-isopropylacrylamide)/clay/poly(acrylamide) IPN hydrogels with the response rate and drug release controlled by clay content. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/polb.21618] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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David G, Simionescu BC, Albertsson AC. Rapid Deswelling Response of Poly(N-isopropylacrylamide)/Poly(2-alkyl-2-oxazoline)/Poly(2-hydroxyethyl methacrylate) Hydrogels. Biomacromolecules 2008; 9:1678-83. [DOI: 10.1021/bm800215d] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Geta David
- Department of Natural and Synthetic Polymers, “Gh. Asachi” Technical University, Iasi, 700050, Romania, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, 700487, Romania, and Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Bogdan C. Simionescu
- Department of Natural and Synthetic Polymers, “Gh. Asachi” Technical University, Iasi, 700050, Romania, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, 700487, Romania, and Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Ann-Christine Albertsson
- Department of Natural and Synthetic Polymers, “Gh. Asachi” Technical University, Iasi, 700050, Romania, “Petru Poni” Institute of Macromolecular Chemistry, Iasi, 700487, Romania, and Royal Institute of Technology, Stockholm, 10044, Sweden
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