201
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Li J, Wu S, Kim E, Yan K, Liu H, Liu C, Dong H, Qu X, Shi X, Shen J, Bentley WE, Payne GF. Electrobiofabrication: electrically based fabrication with biologically derived materials. Biofabrication 2019; 11:032002. [PMID: 30759423 PMCID: PMC7025432 DOI: 10.1088/1758-5090/ab06ea] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
While conventional material fabrication methods focus on form and strength to achieve function, the fabrication of material systems for emerging life science applications will need to satisfy a more subtle set of requirements. A common goal for biofabrication is to recapitulate complex biological contexts (e.g. tissue) for applications that range from animal-on-a-chip to regenerative medicine. In these cases, the material systems will need to: (i) present appropriate surface functionalities over a hierarchy of length scales (e.g. molecular features that enable cell adhesion and topographical features that guide differentiation); (ii) provide a suite of mechanobiological cues that promote the emergence of native-like tissue form and function; and (iii) organize structure to control cellular ingress and molecular transport, to enable the development of an interconnected cellular community that is engaged in cell signaling. And these requirements are not likely to be static but will vary over time and space, which will require capabilities of the material systems to dynamically respond, adapt, heal and reconfigure. Here, we review recent advances in the use of electrically based fabrication methods to build material systems from biological macromolecules (e.g. chitosan, alginate, collagen and silk). Electrical signals are especially convenient for fabrication because they can be controllably imposed to promote the electrophoresis, alignment, self-assembly and functionalization of macromolecules to generate hierarchically organized material systems. Importantly, this electrically based fabrication with biologically derived materials (i.e. electrobiofabrication) is complementary to existing methods (photolithographic and printing), and enables access to the biotechnology toolbox (e.g. enzymatic-assembly and protein engineering, and gene expression) to offer exquisite control of structure and function. We envision that electrobiofabrication will emerge as an important platform technology for organizing soft matter into dynamic material systems that mimic biology's complexity of structure and versatility of function.
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Affiliation(s)
- Jinyang Li
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, United States of America
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202
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Biomimetic modification of poly-l-lysine and electrodeposition of nanocomposite coatings for orthopaedic applications. Colloids Surf B Biointerfaces 2019; 176:115-121. [DOI: 10.1016/j.colsurfb.2018.12.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/28/2018] [Accepted: 12/18/2018] [Indexed: 01/19/2023]
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203
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Sanandiya ND, Lee S, Rho S, Lee H, Kim IS, Hwang DS. Tunichrome-inspired pyrogallol functionalized chitosan for tissue adhesion and hemostasis. Carbohydr Polym 2019; 208:77-85. [DOI: 10.1016/j.carbpol.2018.12.017] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/06/2018] [Accepted: 12/09/2018] [Indexed: 01/02/2023]
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204
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Liang Y, Zhao X, Hu T, Chen B, Yin Z, Ma PX, Guo B. Adhesive Hemostatic Conducting Injectable Composite Hydrogels with Sustained Drug Release and Photothermal Antibacterial Activity to Promote Full-Thickness Skin Regeneration During Wound Healing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900046. [PMID: 30786150 DOI: 10.1002/smll.201900046] [Citation(s) in RCA: 739] [Impact Index Per Article: 147.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/04/2019] [Indexed: 05/22/2023]
Abstract
Developing injectable nanocomposite conductive hydrogel dressings with multifunctions including adhesiveness, antibacterial, and radical scavenging ability and good mechanical property to enhance full-thickness skin wound regeneration is highly desirable in clinical application. Herein, a series of adhesive hemostatic antioxidant conductive photothermal antibacterial hydrogels based on hyaluronic acid-graft-dopamine and reduced graphene oxide (rGO) using a H2 O2 /HPR (horseradish peroxidase) system are prepared for wound dressing. These hydrogels exhibit high swelling, degradability, tunable rheological property, and similar or superior mechanical properties to human skin. The polydopamine endowed antioxidant activity, tissue adhesiveness and hemostatic ability, self-healing ability, conductivity, and NIR irradiation enhanced in vivo antibacterial behavior of the hydrogels are investigated. Moreover, drug release and zone of inhibition tests confirm sustained drug release capacity of the hydrogels. Furthermore, the hydrogel dressings significantly enhance vascularization by upregulating growth factor expression of CD31 and improve the granulation tissue thickness and collagen deposition, all of which promote wound closure and contribute to a better therapeutic effect than the commercial Tegaderm films group in a mouse full-thickness wounds model. In summary, these adhesive hemostatic antioxidative conductive hydrogels with sustained drug release property to promote complete skin regeneration are an excellent wound dressing for full-thickness skin repair.
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Affiliation(s)
- Yongping Liang
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Xin Zhao
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Tianli Hu
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Baojun Chen
- Department of Orthopaedics, The First Affiliated Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Zhanhai Yin
- Department of Orthopaedics, The First Affiliated Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Peter X Ma
- Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI, 48109, USA
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Baolin Guo
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
- Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, China
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205
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Gan L, Tan NCS, Gupta A, Singh M, Pokholenko O, Ghosh A, Zhang Z, Li S, Steele TWJ. Self curing and voltage activated catechol adhesives. Chem Commun (Camb) 2019; 55:10076-10079. [DOI: 10.1039/c9cc04166d] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Catechol adhesives are designed for curing with a low voltage signal—no oxidants or metal chelators are required.
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Affiliation(s)
- Lu Gan
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
| | - Nigel C. S. Tan
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
| | - Avi Gupta
- Department of Materials Science and Engineering
- Indian Institute of Technology
- Kanpur
- India
| | - Manisha Singh
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
- NTU-Northwestern Institute for Nanomedicine (NNIN)
| | - Oleksandr Pokholenko
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
| | - Animesh Ghosh
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
| | - Zhonghan Zhang
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
| | - Shuzhou Li
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
| | - Terry W. J. Steele
- School of Materials Science and Engineering (MSE)
- Division of Materials Technology
- Nanyang Technological University (NTU)
- Singapore 639798
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206
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Kang B, Shin J, Park HJ, Rhyou C, Kang D, Lee SJ, Yoon YS, Cho SW, Lee H. High-resolution acoustophoretic 3D cell patterning to construct functional collateral cylindroids for ischemia therapy. Nat Commun 2018; 9:5402. [PMID: 30573732 PMCID: PMC6302096 DOI: 10.1038/s41467-018-07823-5] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 11/23/2018] [Indexed: 12/14/2022] Open
Abstract
The fabrication of functional tissues is essential for clinical applications such as disease treatment and drug discovery. Recent studies have revealed that the mechanical environments of tissues, determined by geometric cell patterns, material composition, or mechanical properties, play critical roles in ensuring proper tissue function. Here, we propose an acoustophoretic technique using surface acoustic waves to fabricate therapeutic vascular tissue containing a three-dimensional collateral distribution of vessels. Co-aligned human umbilical vein endothelial cells and human adipose stem cells that are arranged in a biodegradable catechol-conjugated hyaluronic acid hydrogel exhibit enhanced cell-cell contacts, gene expression, and secretion of angiogenic and anti-inflammatory paracrine factors. The therapeutic effects of the fabricated vessel constructs are demonstrated in experiments using an ischemia mouse model by exhibiting the remarkable recovery of damaged tissue. Our study can be referenced to fabricate various types of artificial tissues that mimic the original functions as well as structures. Engineering 3D tissues faces the challenge of adequate vascularisation for nutrient delivery and gas exchange deep inside the construct. Here the authors use surface acoustic waves to create an aligned array of blood vessels in a hyaluronic acid hydrogel and use it to improve function in a mouse hindlimb ischemia model.
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Affiliation(s)
- Byungjun Kang
- School of Mechanical Engineering, Yonsei University, Seoul, 03722, Korea
| | - Jisoo Shin
- Department of Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Hyun-Ji Park
- Department of Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Chanryeol Rhyou
- School of Mechanical Engineering, Yonsei University, Seoul, 03722, Korea
| | - Donyoung Kang
- School of Mechanical Engineering, Yonsei University, Seoul, 03722, Korea
| | - Shin-Jeong Lee
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, 03722, Korea
| | - Young-Sup Yoon
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, 03722, Korea
| | - Seung-Woo Cho
- Department of Biotechnology, Yonsei University, Seoul, 03722, Korea. .,Center for Nanomedicine, Institute for Basic Science (IBS), Seoul, 03722, Korea.
| | - Hyungsuk Lee
- School of Mechanical Engineering, Yonsei University, Seoul, 03722, Korea.
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207
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Hong HR, Kim J, Park CH. Facile fabrication of multifunctional fabrics: use of copper and silver nanoparticles for antibacterial, superhydrophobic, conductive fabrics. RSC Adv 2018; 8:41782-41794. [PMID: 35558807 PMCID: PMC9091953 DOI: 10.1039/c8ra08310j] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 11/29/2018] [Indexed: 11/28/2022] Open
Abstract
This study aims to develop a multifunctional fabric for antibacterial, superhydrophobic and conductive performance using a facile fabrication method. Conductive metal particles, copper and silver, were used as antibacterial agents as well as a means to create nanoscale roughness on the fabric surface. Subsequent hydrophobic coating with 1-dodecanethiol produced a superhydrophobic surface. The single metal treatment with Cu or Ag, and the combined metal treatment of Cu/Ag were compared for the multifunctionality. The Cu/Ag treated fabric and the Cu treated fabric showed a bacteriostatic rate ≥ 99% and a sterilization rate ≥ 99% against S. aureus, suggesting a higher antibacterial activity against the Gram-positive bacteria. In contrast, the Ag treated fabric showed a lower antibacterial effect regardless of the bacteria type. With regards to conductivity, the single metal treated fabric did not exhibit conductivity; however the Cu/Ag treated fabric showed a high level conductivity with a surface resistivity of 25.17 ± 8.18 Ω sq-1 and 184.38 ± 85.42 Ω sq-1 before and after hydrophobic coating, respectively. Fabrics treated with Cu and Cu/Ag particles (with hydrophobic coating) displayed superhydrophobic characteristics with the contact angle of 161-162° and the shedding angle of 7.0-7.8°. The air permeability decreased after the particle treatment as the particles blocked the pores in the fabric. However, the water vapor permeability and tensile strength were not significantly affected by the particle treatment. This study is significant in that a multifunctionality of antibacterial effect, superhydrophobicity, and conductivity was achieved through the facile processes for metal nanoparticle attachment and hydrophobic coating. The multifunctional fabrics produced in this study can be practically applied to self-cleaning smart clothing, which has reduced laundering need, without hygiene concerns.
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Affiliation(s)
- Hyae Rim Hong
- Department of Textiles, Merchandising and Fashion Design, Seoul National University Seoul 08826 Republic of Korea
| | - Jooyoun Kim
- Department of Textiles, Merchandising and Fashion Design, Seoul National University Seoul 08826 Republic of Korea
| | - Chung Hee Park
- Department of Textiles, Merchandising and Fashion Design, Seoul National University Seoul 08826 Republic of Korea
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208
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Han X, Meng G, Wang Q, Cui L, Wang H, Wu J, Liu Z, Guo X. Mussel-inspired in situ forming adhesive hydrogels with anti-microbial and hemostatic capacities for wound healing. J Biomater Appl 2018; 33:915-923. [DOI: 10.1177/0885328218810552] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
All kinds of commercially available wound dressings are clinically used as fleshly obstacles and therapeutic materials in opposition to microbial incursion. Few researches focused on effective-bleeding and anti-bacteria at the same time. In order to better solve this problem, two hydrogels were synthetized in this study. One is phosphate buffer solution-activated dopamine-modified-γ-poly glutamic acid (PBS-PD) hydrogel, the other one is cirsium setosum extracts-activated dopamine-modified-γ-poly glutamic acid (CSE-PD) hydrogel. The two hydrogels are prepared by applying an enzyme-catalyzed crosslinking means in the presence of horseradish peroxidase (HRP) and hydrogen peroxide (H2O2). The chemical structures were characterized through 1H-NMR and FT-IR. In conclusion, both PBS-PD and CSE-PD hydrogels exhibit superior tissue adhesion properties, and remarkable anti-infection quality. In addition, these two hydrogels manifest prominent hemostatic efficiency. The bio adhesion performance can achieve 30 kPa, meanwhile the CSE-PD hydrogels show good germicidal properties, and the antibacterial rate can reach 98%. The hydrogels could reduce blood loss without any obvious side effect, and present a new prospect in the field of hemostasis rapidly.
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Affiliation(s)
- Xiaoman Han
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Guihua Meng
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Qian Wang
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Lin Cui
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
- School of Medical Science, Shihezi University, Shihezi, Xinjiang, China
| | - Hao Wang
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Jianning Wu
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Zhiyong Liu
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
| | - Xuhong Guo
- School of Chemistry and Chemical Engineering, Shihezi University/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region/Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan, Shihezi, Xinjiang, China
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China
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209
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Behboodi-Sadabad F, Trouillet V, Welle A, Messersmith PB, Levkin PA. Surface Functionalization and Patterning by Multifunctional Resorcinarenes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:39268-39278. [PMID: 30335364 DOI: 10.1021/acsami.8b14771] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plant phenolic compounds and catecholamines have been widely used to obtain substrate-independent precursor nanocoatings and adhesives. Nevertheless, there are downsides in using such phenolic compounds for surface modification such as formation of nonuniform coatings, need for multistep modification, and restricted possibilities for postfunctionalization. In this study, inspired by a strong binding ability of natural polyphenols found in plants, we used three different macrocyclic polyphenols, known as resorcin[4]arenes, to modify the surface of different substrates by simple dip-coating into the dilute solution of these compounds. Eight hydroxyl groups on the large rim of these resorcin[4]arenes provide multiple anchoring points to the surface, whereas the lower rim decorated with different appending groups introduces the desired chemical and physical functionalities to the substrate's surface. Deposition of a uniform and transparent resorcinarene layer on the surface was confirmed by several surface characterization techniques. Incubation of the modified substrates in different environments indicated that the stability of the resorcinarene layer was dependent on the type of substrate and the pH value. The most stable resorcinarene layer was formed on amine-functionalized substrates. The surface was modified with alkenyl functional groups in one step using a resorcinarene compound possessing four alkenyl appending groups on its small rim. Thiol-ene photoclick chemistry was used to site-selectively postfunctionalize the surface with hydrophilic and hydrophobic micropatterns, which was confirmed by X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry. Thus, we demonstrate that resorcin[4]arenes extend the scope of applications of plant polyphenol and mussel-inspired precursors to tailor-made multifunctional nanocoatings, suitable for a variety of potential applications in biotechnology, biology, and material science.
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Affiliation(s)
- F Behboodi-Sadabad
- Institute of Organic Chemistry (IOC) , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany
| | | | | | - Phillip B Messersmith
- Departments of Materials Science and Engineering and Bioengineering , University of California Berkeley , 94720 Berkeley , United States
| | - Pavel A Levkin
- Institute of Organic Chemistry (IOC) , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany
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210
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Lu JW, Miao Y, Guo CX, Ke QF, Yin JH, Zhou SM, Guo YP. Lanthanum-Doped Chitosan Hydrogels Promote the Apoptosis of Melanoma Cells by Bcl-2/Bax Pathway. ACS APPLIED BIO MATERIALS 2018; 1:1468-1477. [DOI: 10.1021/acsabm.8b00417] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia-Wei Lu
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | | | - Cui-Xiang Guo
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | - Qin-Fei Ke
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
| | | | | | - Ya-Ping Guo
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China
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211
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Liang Y, Zhao X, Ma PX, Guo B, Du Y, Han X. pH-responsive injectable hydrogels with mucosal adhesiveness based on chitosan-grafted-dihydrocaffeic acid and oxidized pullulan for localized drug delivery. J Colloid Interface Sci 2018; 536:224-234. [PMID: 30368094 DOI: 10.1016/j.jcis.2018.10.056] [Citation(s) in RCA: 245] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/18/2018] [Accepted: 10/19/2018] [Indexed: 11/27/2022]
Abstract
Injectable hydrogels with multifunctional properties, including tissue adhesiveness and pH-sensitivity are highly desired for localized drug delivery in disease treatment, and their design is still challenging. We developed a series of multifunctional injectable mucoadhesive and pH-responsive hydrogels based on chitosan-grafted-dihydrocaffeic acid (CS-DA) and oxidized pullulan (OP) via a Schiff base reaction. These hydrogels exhibited good injectability, suitable gelation time, in vitro pH-dependent equilibrated swelling ratios, morphologies, and rheological characteristics. The desirable in vitro pH-sensitive drug release behavior of these hydrogels was demonstrated by a drug release test with anti-cancer drug doxorubicin (DOX) loaded hydrogels at different pH values. The hydrogels showed good DOX release, effectively killing colon tumor cells (HCT116 cells) and good antibacterial properties against E. coli and S. aureus in vitro when the antibacterial model drug amoxicillin was encapsulated in the hydrogels. A lap-shear test was also carried out with these hydrogels. The hydrogels exhibited good mucosal adhesion, indicating their potential use in mucosa-localized drug delivery systems. All these results suggest that these injectable pH-responsive adhesive hydrogels are ideal candidates for development of colon cancer drug delivery carriers or mucoadhesive drug delivery systems.
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Affiliation(s)
- Yongping Liang
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xin Zhao
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Peter X Ma
- Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI 48109, USA; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Baolin Guo
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Yaping Du
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
| | - Xuezhe Han
- Department of Orthopaedics, The First Affiliated Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an 710061, China.
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212
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Heher P, Ferguson J, Redl H, Slezak P. An overview of surgical sealant devices: current approaches and future trends. Expert Rev Med Devices 2018; 15:747-755. [DOI: 10.1080/17434440.2018.1526672] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Philipp Heher
- Austrian Cluster for Tissue Regeneration, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology/AUVA Research Center, Vienna, Austria
| | - James Ferguson
- Austrian Cluster for Tissue Regeneration, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology/AUVA Research Center, Vienna, Austria
| | - Heinz Redl
- Austrian Cluster for Tissue Regeneration, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology/AUVA Research Center, Vienna, Austria
| | - Paul Slezak
- Austrian Cluster for Tissue Regeneration, Ludwig Boltzmann Institute for Experimental and Clinical Traumatology/AUVA Research Center, Vienna, Austria
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213
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Zeng Z, Mo X. Rapid in situ cross-linking of hydrogel adhesives based on thiol-grafted bio-inspired catechol-conjugated chitosan. J Biomater Appl 2018; 32:612-621. [PMID: 29113567 DOI: 10.1177/0885328217738403] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this paper, a novel chitosan derivative, thiol-grafting bio-inspired catechol-conjugated chitosan was synthesized. The chemical structure of the synthesized catechol-conjugated chitosan was verified by 1H NMR, and its contents of thiol group and catechol group were determined by UV-vis spectrum. Four percent of catechol-conjugated chitosan aqueous solution could form hydrogels rapidly in situ in 1 min or less with the addition of sodium periodate. Rheological studies showed that the mechanical properties depend on the concentrations of catechol-conjugated chitosan and the molar ratio of sodium periodate to catechol groups. Additionally, the adhesive properties of the resulting adhesives were evaluated, and the adhesion strength of obtained adhesives was as high as 50 kPa because of the complex and multiple interactions, especially the anti-oxidation mechanism of thiol group. The in vitro cytotoxicity assays demonstrated an excellent biocompatibility of the catechol-conjugated chitosan hydrogels. Benefiting from the in situ fast cured, desired mechanical strength, biocompatibility and relatively high adhesion performance, these properties suggested that catechol-conjugated chitosan hydrogel adhesives have potential applications as tissue adhesive for soft tissues.
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Affiliation(s)
- Zhiwen Zeng
- 168286 College of Materials Science and Engineering, Donghua University , Shanghai, China
| | - Xiumei Mo
- 168286 College of Materials Science and Engineering, Donghua University , Shanghai, China
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214
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Liu Y, Wu HC, Bhokisham N, Li J, Hong KL, Quan DN, Tsao CY, Bentley WE, Payne GF. Biofabricating Functional Soft Matter Using Protein Engineering to Enable Enzymatic Assembly. Bioconjug Chem 2018; 29:1809-1822. [PMID: 29745651 PMCID: PMC7045599 DOI: 10.1021/acs.bioconjchem.8b00197] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Biology often provides the inspiration for functional soft matter, but biology can do more: it can provide the raw materials and mechanisms for hierarchical assembly. Biology uses polymers to perform various functions, and biologically derived polymers can serve as sustainable, self-assembling, and high-performance materials platforms for life-science applications. Biology employs enzymes for site-specific reactions that are used to both disassemble and assemble biopolymers both to and from component parts. By exploiting protein engineering methodologies, proteins can be modified to make them more susceptible to biology's native enzymatic activities. They can be engineered with fusion tags that provide (short sequences of amino acids at the C- and/or N- termini) that provide the accessible residues for the assembling enzymes to recognize and react with. This "biobased" fabrication not only allows biology's nanoscale components (i.e., proteins) to be engineered, but also provides the means to organize these components into the hierarchical structures that are prevalent in life.
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Affiliation(s)
| | - Hsuan-Chen Wu
- Department of Biochemical Science and Technology , National Taiwan University , Taipei City , Taiwan
| | | | | | - Kai-Lin Hong
- Department of Biochemical Science and Technology , National Taiwan University , Taipei City , Taiwan
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215
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Shin M, Ryu JH, Kim K, Kim MJ, Jo S, Lee MS, Lee DY, Lee H. Hemostatic Swabs Containing Polydopamine-like Catecholamine Chitosan-Catechol for Normal and Coagulopathic Animal Models. ACS Biomater Sci Eng 2018; 4:2314-2318. [DOI: 10.1021/acsbiomaterials.8b00451] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
| | - Ji Hyun Ryu
- Department of Carbon Convergence Engineering, Wonkwang University, Iksan, Jeonbuk 54538, South Korea
| | | | - Min Jun Kim
- Department of Bioengineering, College of Engineering, and BK21 PLUS Future Biopharmaceutical Human Resources Training and Research Team Institute of Nano Science & Technology (INST), Hanyang University 222 Wangsimni-ro, Seong Dong-gu, Seoul 04763, South Korea
| | - Seongyeon Jo
- InnoTherapy Inc. 97 Uisadang-daero, Yeongdeungpo-gu, Seoul 07327, South Korea
| | - Moon Sue Lee
- InnoTherapy Inc. 97 Uisadang-daero, Yeongdeungpo-gu, Seoul 07327, South Korea
| | - Dong Yun Lee
- Department of Bioengineering, College of Engineering, and BK21 PLUS Future Biopharmaceutical Human Resources Training and Research Team Institute of Nano Science & Technology (INST), Hanyang University 222 Wangsimni-ro, Seong Dong-gu, Seoul 04763, South Korea
| | - Haeshin Lee
- InnoTherapy Inc. 97 Uisadang-daero, Yeongdeungpo-gu, Seoul 07327, South Korea
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216
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Peng X, Peng Y, Han B, Liu W, Zhang F, Linhardt RJ. IO4−-stimulated crosslinking of catechol-conjugated hydroxyethyl chitosan as a tissue adhesive. J Biomed Mater Res B Appl Biomater 2018; 107:582-593. [DOI: 10.1002/jbm.b.34150] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 02/26/2018] [Accepted: 04/17/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Xiaoting Peng
- College of Marine Life Sciences, Ocean University of China; Qingdao China
| | - Yanfei Peng
- College of Marine Life Sciences, Ocean University of China; Qingdao China
| | - Baoqin Han
- College of Marine Life Sciences, Ocean University of China; Qingdao China
| | - Wanshun Liu
- College of Marine Life Sciences, Ocean University of China; Qingdao China
| | - Fuming Zhang
- Department of Chemistry and Chemical Biology; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
- Department of Chemical and Biological Engineering; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
- Department of Biology; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
- Department of Biomedical Engineering; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
| | - Robert J Linhardt
- Department of Chemistry and Chemical Biology; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
- Department of Chemical and Biological Engineering; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
- Department of Biology; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
- Department of Biomedical Engineering; Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute; Troy New York 12180
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217
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Kim SH, Lee SH, Lee JE, Park SJ, Kim K, Kim IS, Lee YS, Hwang NS, Kim BG. Tissue adhesive, rapid forming, and sprayable ECM hydrogel via recombinant tyrosinase crosslinking. Biomaterials 2018; 178:401-412. [PMID: 29752077 DOI: 10.1016/j.biomaterials.2018.04.057] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 04/27/2018] [Accepted: 04/29/2018] [Indexed: 12/14/2022]
Abstract
We report on a tissue adhesive hydrogel based on novel recombinant tyrosinase mediated crosslinking. The adhesive hydrogels were fabricated by the site-directed coupling of tyramine-conjugated hyaluronic acid (HA_t, 1% w/v) and gelatin (3% w/v) (HG_gel) with novel tyrosinase derived from Streptomyces avermitilis (SA_Ty). The enzyme-based crosslinking by SA_Ty was fast, with less than 50 s for complete gelation, and the SA_Ty based crosslinking enhanced the physical properties and adhesive strength of the hydrogel significantly with the native tissue samples. Furthermore, by optimizing the injection conditions, we tailored the enzyme-based crosslinking hydrogels to be injectable and sprayable with a medical syringe and commercial airbrush nozzle, respectively. An in vivo analysis of the adhesive hydrogel showed a negligible immune reaction. In this study, demonstrate that the novel enzyme-based crosslinking hydrogel has a robust potential in tissue engineering and regenerative medicine.
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Affiliation(s)
- Su-Hwan Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Sang-Hyuk Lee
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea; Institute of Bioengineering, Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Ju-Eun Lee
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea; Institute of Bioengineering, Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Sung Jun Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Kyungmin Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - In Seon Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Yoon-Sik Lee
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Nathaniel S Hwang
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea; Institute of Chemical Processes, Seoul National University, Seoul, 151-742, Republic of Korea.
| | - Byung-Gee Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 151-742, Republic of Korea; School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-742, Republic of Korea; Institute of Bioengineering, Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 151-742, Republic of Korea.
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218
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Clifford A, Pang X, Zhitomirsky I. Biomimetically modified chitosan for electrophoretic deposition of composites. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.02.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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219
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Liu F, Long Y, Zhao Q, Liu X, Qiu G, Zhang L, Ling Q, Gu H. Gallol-containing homopolymers and block copolymers: ROMP synthesis and gelation properties by metal-coordination and oxidation. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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220
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Bio-inspired redox-cycling antimicrobial film for sustained generation of reactive oxygen species. Biomaterials 2018; 162:109-122. [DOI: 10.1016/j.biomaterials.2017.12.027] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 12/20/2017] [Accepted: 12/31/2017] [Indexed: 02/07/2023]
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221
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Santos LF, Correia IJ, Silva AS, Mano JF. Biomaterials for drug delivery patches. Eur J Pharm Sci 2018; 118:49-66. [PMID: 29572160 DOI: 10.1016/j.ejps.2018.03.020] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 03/12/2018] [Accepted: 03/19/2018] [Indexed: 01/22/2023]
Abstract
The limited efficiency of conventional drugs has been instigated the development of new and more effective drug delivery systems (DDS). Transdermal DDS, are associated with numerous advantages such its painless application and less frequent replacement and greater flexibility of dosing, features that triggered the research and development of such devices. Such systems have been produced using either biopolymer; or synthetic polymers. Although the first ones are safer, biocompatible and present a controlled degradation by human enzymes or water, the second ones are the most currently available in the market due to their greater mechanical resistance and flexibility, and non-degradation over time. This review highlights the most recent advances (mainly in the last five years) of patches aimed for transdermal drug delivery, focusing on the different materials (natural, synthetic and blends) and latest designs for the development of such devices, emphasizing also their combination with drug carriers that enable enhanced drug solubility and a more controlled release of the drug over the time. The benefits and limitations of different patches formulations are considered with reference to their appliance to transdermal drug delivery. Furthermore, a record of the currently available patches on the market is given, featuring their most relevant characteristics. Finally, a list of most recent/ongoing clinical trials regarding the use of patches for skin disorders is detailed and critical insights on the current state of patches for transdermal drug delivery are also provided.
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Affiliation(s)
- Lúcia F Santos
- Department of Chemistry, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Ilídio J Correia
- CICS UBI, Centro de Investigação em Ciências da Saúde, Faculdade de Ciências da Saúde, Universidade da Beira Interior, Av. Infante D Henrique, 6200-506 Covilhã, Portugal.
| | - A Sofia Silva
- Department of Chemistry, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - João F Mano
- Department of Chemistry, CICECO, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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222
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Im BG, Do M, Kim Y, Cho M, Jang JH. BiFACIAL ( Biomimetic Freestanding Anisotropic Catechol- Interfaces with Asymmetrically Layered) Films as Versatile Extracellular Matrix Substitutes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7602-7613. [PMID: 28910078 DOI: 10.1021/acsami.7b10023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Biological naïve extracellular matrices (ECMs) exhibit anisotropic functions in their physical, chemical, and morphological properties. Representative examples include anisotropic skin layers or blood vessels simultaneously facing multiphasic environments. Here, anisotropically multifunctional structures called BiFACIAL ( biomimetic freestanding anisotropic catechol- interfaces with asymmetrically layered) films were developed simply by contacting two polysaccharide solutions of heparin-catechol (Hep-C) and chitosan-catechol (Chi-C). Such anisotropic characters were due to controlling catechol cross-linking by alkaline pH, resulting in a trimodular structure: a rigid yet porous Hep-C exterior, nonporous interfacial zone, and soft/highly porous Chi-C interior. The anisotropic features of each layer, including the porosity, rigidity, rheology, composition, and ionic strength, caused the BiFACIAL films to show spontaneously biased stimuli responses and differential behaviors against biological substances (e.g., blood plasma). The films could be created in situ in live animals and imitated the structural/functional aspects of the representative anisotropic tissues (e.g., skin and blood vessels), providing valuable ECM-like platforms for the creation of favorable environments or for tissue regeneration or disease treatment by effectively manipulating cellular behaviors.
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Affiliation(s)
- Byung Gee Im
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu , Seoul 120-749 , Korea
| | - Minjae Do
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu , Seoul 120-749 , Korea
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Korea
| | - Yoojin Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu , Seoul 120-749 , Korea
| | - Mira Cho
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu , Seoul 120-749 , Korea
| | - Jae-Hyung Jang
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu , Seoul 120-749 , Korea
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223
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Ryu JH, Messersmith PB, Lee H. Polydopamine Surface Chemistry: A Decade of Discovery. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7523-7540. [PMID: 29465221 PMCID: PMC6320233 DOI: 10.1021/acsami.7b19865] [Citation(s) in RCA: 853] [Impact Index Per Article: 142.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Polydopamine is one of the simplest and most versatile approaches to functionalizing material surfaces, having been inspired by the adhesive nature of catechols and amines in mussel adhesive proteins. Since its first report in 2007, a decade of studies on polydopamine molecular structure, deposition conditions, and physicochemical properties have ensued. During this time, potential uses of polydopamine coatings have expanded in many unforeseen directions, seemingly only limited by the creativity of researchers seeking simple solutions to manipulating surface chemistry. In this review, we describe the current state of the art in polydopamine coating methods, describe efforts underway to uncover and tailor the complex structure and chemical properties of polydopamine, and identify emerging trends and needs in polydopamine research, including the use of dopamine analogs, nitrogen-free polyphenolic precursors, and improvement of coating mechanical properties.
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Affiliation(s)
- Ji Hyun Ryu
- Department of Carbon Fusion Engineering, Wonkwang University, Iksan, Jeonbuk 54538, South Korea
| | - Phillip B. Messersmith
- Departments of Bioengineering and Materials Science and Engineering, University of California, Berkeley, 210 Hearst Mining Building, Berkeley, California 94720-1760, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Road, Daejeon 34141, South Korea
- Center for Nature-inspired Technology (CNiT), KAIST Institute of NanoCentury, 291 University Road, Daejeon 34141, South Korea
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224
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M Ways TM, Lau WM, Khutoryanskiy VV. Chitosan and Its Derivatives for Application in Mucoadhesive Drug Delivery Systems. Polymers (Basel) 2018; 10:E267. [PMID: 30966302 PMCID: PMC6414903 DOI: 10.3390/polym10030267] [Citation(s) in RCA: 407] [Impact Index Per Article: 67.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/17/2018] [Accepted: 03/02/2018] [Indexed: 12/14/2022] Open
Abstract
Mucoadhesive drug delivery systems are desirable as they can increase the residence time of drugs at the site of absorption/action, provide sustained drug release and minimize the degradation of drugs in various body sites. Chitosan is a cationic polysaccharide that exhibits mucoadhesive properties and it has been widely used in the design of mucoadhesive dosage forms. However, its limited mucoadhesive strength and limited water-solubility at neutral and basic pHs are considered as two major drawbacks of its use. Chemical modification of chitosan has been exploited to tackle these two issues. In this review, we highlight the up-to-date studies involving the synthetic approaches and description of mucoadhesive properties of chitosan and chitosan derivatives. These derivatives include trimethyl chitosan, carboxymethyl chitosan, thiolated chitosan, chitosan-enzyme inhibitors, chitosan-ethylenediaminetetraacetic acid (chitosan-EDTA), half-acetylated chitosan, acrylated chitosan, glycol chitosan, chitosan-catechol, methyl pyrrolidinone-chitosan, cyclodextrin-chitosan and oleoyl-quaternised chitosan. We have particularly focused on the effect of chemical derivatization on the mucoadhesive properties of chitosan. Additionally, other important properties including water-solubility, stability, controlled release, permeation enhancing effect, and in vivo performance are also described.
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Affiliation(s)
- Twana Mohammed M Ways
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, UK.
| | - Wing Man Lau
- School of Pharmacy, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK.
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225
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Li C, Gu Y, Zacharia NS. Tuning Wet Adhesion of Weak Polyelectrolyte Multilayers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7401-7412. [PMID: 29389109 DOI: 10.1021/acsami.7b18910] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Weak polyelectrolyte multilayers (PEMs) assembled by the layer-by-layer method are known to become tacky upon contact with water and behave as a viscoelastic fluid, but this wet adhesive property and how it can be modified by external stimuli has not yet been fully explored. We present here a study on the wet adhesive performance of PEMs consisting of branched poly(ethylene imine) and poly(acrylic acid) under controlled conditions (e.g., pH, type of salt, and ionic strength) using a 90° peel test. The multilayers demonstrate stick-slip behavior and fail cohesively in nearly all cases. The peel force is the highest at neutral pH, and it decreases in both acidic/basic environments because of inhibited polyelectrolyte mobility. The addition of salts with various metal ions generally reduces the peel force, and this effect tracks with the ionic strength. When transition metal ions are used, their ability to form coordination bonds increases the peel force, with two exceptions (Cu2+ and Zn2+). With a transition metal ion such as Fe3+, the peel force first increases as a function of the concentration and then eventually decreases. The peel force increases proportionally to the peel rate. The films are also characterized via zeta potential (when assembled onto colloidal particles) and shear rheometry. This work provides insight into both the wet adhesive properties of PEMs and the interactions between PEMs and metal ions.
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Affiliation(s)
- Chao Li
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Yuanqing Gu
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
| | - Nicole S Zacharia
- Department of Polymer Engineering, University of Akron , Akron, Ohio 44325, United States
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226
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Lu M, Liu Y, Huang YC, Huang CJ, Tsai WB. Fabrication of photo-crosslinkable glycol chitosan hydrogel as a tissue adhesive. Carbohydr Polym 2018; 181:668-674. [DOI: 10.1016/j.carbpol.2017.11.097] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/01/2017] [Accepted: 11/27/2017] [Indexed: 10/18/2022]
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227
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Kang H, Wang Z, Zhao S, Wang Q, Zhang S. Reinforced soy protein isolate-based bionanocomposites with halloysite nanotubes via mussel-inspired dopamine and polylysine codeposition. J Appl Polym Sci 2018. [DOI: 10.1002/app.46197] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Haijiao Kang
- MOE Key Laboratory of Wooden Material Science and Application; Beijing Forestry University; Beijing 100083 China
| | - Zhong Wang
- MOE Key Laboratory of Wooden Material Science and Application; Beijing Forestry University; Beijing 100083 China
| | - Shujun Zhao
- MOE Key Laboratory of Wooden Material Science and Application; Beijing Forestry University; Beijing 100083 China
| | - Qingchun Wang
- School of Technology; Beijing Forestry University; Beijing 100083 China
| | - Shifeng Zhang
- MOE Key Laboratory of Wooden Material Science and Application; Beijing Forestry University; Beijing 100083 China
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228
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Lee D, Park JP, Koh MY, Kim P, Lee J, Shin M, Lee H. Chitosan-catechol: a writable bioink under serum culture media. Biomater Sci 2018; 6:1040-1047. [DOI: 10.1039/c8bm00174j] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mussel-inspired adhesive polymers exhibiting rapid complexation with serum proteins are used as a direct writable bioink for additive techniques, 3D printing. The mussel-inspired bioinks would be a promising way to design a biocompatible 3D bioink cross-linked without any external stimuli.
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Affiliation(s)
- Daiheon Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
| | - Joseph P. Park
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
| | - Mi-Young Koh
- InnoTherapy Inc. 97 Uisadang-daero
- Seoul 07327
- South Korea
| | - Pureum Kim
- Bio-Mechatronics Team
- Division of Nano-Machinery
- Korea Institute of Machinery and Materials(KIMM)
- Daejeon 34103
- South Korea
| | - Junhee Lee
- Bio-Mechatronics Team
- Division of Nano-Machinery
- Korea Institute of Machinery and Materials(KIMM)
- Daejeon 34103
- South Korea
| | - Mikyung Shin
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
| | - Haeshin Lee
- Department of Chemistry
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon 34141
- South Korea
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229
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Hu W, Zhang Z, Lu S, Zhang T, Zhou N, Ren P, Wang F, Yang Y, Ji Z. Assembled anti-adhesion polypropylene mesh with self-fixable and degradable in situ mussel-inspired hydrogel coating for abdominal wall defect repair. Biomater Sci 2018; 6:3030-3041. [DOI: 10.1039/c8bm00824h] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Construction of assembled anti-adhesion polypropylene mesh through in situ coating with self-fixable and degradable hydrogels.
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Affiliation(s)
- Wanjun Hu
- State Key Lab of Bioelectronics
- National Demonstration Center for Experimental Biomedical Engineering Education
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
| | - Zhigang Zhang
- Department of General Surgery
- Zhongda Hospital
- School of Medicine
- Southeast University
- Nanjing 210009
| | - Shenglin Lu
- Department of General Surgery
- Zhongda Hospital
- School of Medicine
- Southeast University
- Nanjing 210009
| | - Tianzhu Zhang
- State Key Lab of Bioelectronics
- National Demonstration Center for Experimental Biomedical Engineering Education
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
| | - Naizhen Zhou
- State Key Lab of Bioelectronics
- National Demonstration Center for Experimental Biomedical Engineering Education
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
| | - Pengfei Ren
- State Key Lab of Bioelectronics
- National Demonstration Center for Experimental Biomedical Engineering Education
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
| | - Faming Wang
- State Key Lab of Bioelectronics
- National Demonstration Center for Experimental Biomedical Engineering Education
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing 210096
| | - Yang Yang
- College of clinical medicine
- Panzhihua University
- Panzhihua 617000
- China
| | - Zhenling Ji
- Department of General Surgery
- Zhongda Hospital
- School of Medicine
- Southeast University
- Nanjing 210009
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230
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Lu D, Li Y, Wang X, Li T, Zhang Y, Guo H, Sun S, Wang X, Zhang Y, Lei Z. All-in-one hyperbranched polypeptides for surgical adhesives and interventional embolization of tumors. J Mater Chem B 2018; 6:7511-7520. [DOI: 10.1039/c8tb01015c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A series of hyperbranched, thermo-responsive and mussel-inspired polypeptides were synthesized and used for surgical adhesion, hemostasis and interventional embolization.
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Affiliation(s)
- Dedai Lu
- Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
| | - Yunfei Li
- Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
| | - Xiangya Wang
- Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
| | - Ting’e Li
- Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
| | - Yongyong Zhang
- Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
| | - Hongyun Guo
- Institute of Gansu Medical Science Research
- Gansu Provincial Cancer Hospital
- Lanzhou
- P. R. China
| | - Shaobo Sun
- Gansu University of Chinese Medicine
- Lanzhou
- P. R. China
| | - Xiaoqi Wang
- Institute of Gansu Medical Science Research
- Gansu Provincial Cancer Hospital
- Lanzhou
- P. R. China
| | - Yongdong Zhang
- Institute of Gansu Medical Science Research
- Gansu Provincial Cancer Hospital
- Lanzhou
- P. R. China
| | - Ziqiang Lei
- Key Laboratory of Eco-environment-related Polymer Materials Ministry of Education
- Key Laboratory of Polymer Materials of Gansu Province
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
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231
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Lu M, Yu J. Mussel-Inspired Biomaterials for Cell and Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:451-474. [PMID: 30357703 DOI: 10.1007/978-981-13-0947-2_24] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In designing biomaterial for regenerative medicine or tissue engineering, there are a variety of issues to consider including biocompatibility, biochemical reactivity, and cellular interaction etc. Mussel-inspired biomaterials have received much attention because of its appealing features including strong adhesiveness on moist surfaces, enhancement of cell adhesion, immobilization of bioactive molecules and its amenability to post-functionalization via catechol chemistry. In this review chapter, we give a brief introduction on the basic principles of mussel-inspired polydopamine coating, catechol conjugation, and discuss how their features play a vital role in biomedical application. Special emphasis is placed on tissue engineering and regenerative applications. We aspire to give readers of this book a comprehensive insight into mussel-inspired biomaterials that can facilitate them make significant contributions in this promising field.
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Affiliation(s)
- Min Lu
- Biomedical and Tissue Engineering Laboratory, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan.
| | - Jiashing Yu
- Biomedical and Tissue Engineering Laboratory, Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
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232
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Hlushko R, Hlushko H, Sukhishvili SA. A family of linear phenolic polymers with controlled hydrophobicity, adsorption and antioxidant properties. Polym Chem 2018. [DOI: 10.1039/c7py01973d] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthesis of a series of antioxidant polymers with varied capability to scavenge radicals and alter the wettability of surfaces is reported.
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Affiliation(s)
- Raman Hlushko
- Department of Materials Science and Engineering
- Texas A&M University
- College Station
- USA
| | - Hanna Hlushko
- Department of Materials Science and Engineering
- Texas A&M University
- College Station
- USA
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233
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Room temperature preparation of fluorescent starch nanoparticles from starch-dopamine conjugates and their biological applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 82:204-209. [DOI: 10.1016/j.msec.2017.08.070] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/11/2017] [Accepted: 08/16/2017] [Indexed: 11/19/2022]
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234
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Yavvari PS, Pal S, Kumar S, Kar A, Awasthi AK, Naaz A, Srivastava A, Bajaj A. Injectable, Self-Healing Chimeric Catechol-Fe(III) Hydrogel for Localized Combination Cancer Therapy. ACS Biomater Sci Eng 2017; 3:3404-3413. [DOI: 10.1021/acsbiomaterials.7b00741] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Prabhu S. Yavvari
- Department
of Chemistry, Indian Institute of Science Education and Research, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India
| | - Sanjay Pal
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad 121001, Haryana India
- Kalinga Institute of Industrial Technology, KIIT Road, Patia, Bhubaneswar 751024, Odisha, India
| | - Sandeep Kumar
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad 121001, Haryana India
- Manipal University, Madhav Nagar,
Near Tiger Circle, Manipal 576104, Karnataka, India
| | - Animesh Kar
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad 121001, Haryana India
| | - Anand Kumar Awasthi
- Department
of Chemistry, Indian Institute of Science Education and Research, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India
| | - Aaliya Naaz
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad 121001, Haryana India
| | - Aasheesh Srivastava
- Department
of Chemistry, Indian Institute of Science Education and Research, Bhopal By-pass Road, Bhauri, Bhopal 462066, Madhya Pradesh, India
| | - Avinash Bajaj
- Laboratory
of Nanotechnology and Chemical Biology, Regional Centre for Biotechnology, NCR Biotech Cluster, 3rd Milestone Faridabad-Gurgaon
Expressway, Faridabad 121001, Haryana India
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235
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Preparation and characterization of gelatin/sericin/carboxymethyl chitosan medical tissue glue. J Appl Biomater Funct Mater 2017; 16:97-106. [DOI: 10.5301/jabfm.5000384] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: The development and application of medical glue has been continuously expanding and advancing. However, there are few glues that combine low-cost with excellent biocompatibility. Methods: We have prepared a medical tissue glue using a gelatin (Gel), sericin (SS) and carboxymethyl chitosan (CMCS) blend solution, cross-linked with 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC). The combination’s characteristics and microstructure morphology were observed by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). Bond strength tests were used to measure the bond strength of the glue. To assay blood compatibility, a hemolytic test, dynamic coagulation test and platelet adherence test were also investigated. Further, the cellular behavior of L-929 and a systemic acute toxicity test on the Gel/SS/CMCS tissue glue were also investigated by MTT and H&E staining. Results: Characterization analysis showed that there was stable binding between raw materials, forming an amide bond with homogeneous holes. The bond strength of the tissue glue reached 2.50 ± 0.04 N in 10 minutes, slightly higher than the alpha-cyanoacrylate biological glue (2.25 ± 0.05 N). Blood compatibility tests revealed that the glue had outstanding blood compatibility. Further, cytotoxicity test and systemic acute toxicity test both showed that the glue was without cytotoxicity and not toxic to the body. Conclusions: The Gel/SS/CMCS tissue glue we prepared at low cost had excellent biocompatibility and structural characteristics. It could be a better candidate for tissue engineering in biomedical applications applied in clinical practice to promote skin wound healing and to further reduce the formation of skin wound scars.
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236
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Liu J, Pu H, Liu S, Kan J, Jin C. Synthesis, characterization, bioactivity and potential application of phenolic acid grafted chitosan: A review. Carbohydr Polym 2017; 174:999-1017. [DOI: 10.1016/j.carbpol.2017.07.014] [Citation(s) in RCA: 159] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 07/03/2017] [Accepted: 07/06/2017] [Indexed: 12/17/2022]
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Amato A, Migneco LM, Martinelli A, Pietrelli L, Piozzi A, Francolini I. Antimicrobial activity of catechol functionalized-chitosan versus Staphylococcus epidermidis. Carbohydr Polym 2017; 179:273-281. [PMID: 29111051 DOI: 10.1016/j.carbpol.2017.09.073] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/08/2017] [Accepted: 09/22/2017] [Indexed: 11/20/2022]
Abstract
Protein mussel-inspired adhesive polymers, characterized by the presence of catechol groups, possess superior muco-adhesive properties and have great potentiality in wound healing. Suitable materials for wound dressing should properly combine muco-adhesiveness and antimicrobial activity. In this work, catechol-functionalized chitosan was obtained by reaction with hydrocaffeic acid (HCAF), in order to investigate how catechol introduction at different content could affect the intrinsic antimicrobial activity of the polymer itself. Unexpectedly, an enhancement of chitosan antimicrobial activity was observed after catechol functionalization, with a fourfold reduction in the polymer minimum inhibitory concentration versus Staphylococcus epidermidis. Additionally, a commercial wound dressing coated with one of the synthesized CS-HCAF derivatives showed a significant reduction in the adhesion of S. epidermidis compared to the uncoated dressing (3-log reduction). The CS-HCAF derivatives also showed an interesting antioxidant property (EC50 ranging from 20 to 60μg/mL), which further confirms the potentiality of these materials as wound dressings.
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Affiliation(s)
- Andrea Amato
- Department of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy.
| | - Luisa Maria Migneco
- Department of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy.
| | - Andrea Martinelli
- Department of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy.
| | - Loris Pietrelli
- ENEA, C.R. Casaccia, Via Anguillarese 301, 00100 Rome, Italy.
| | - Antonella Piozzi
- Department of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy.
| | - Iolanda Francolini
- Department of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy.
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238
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Schattling P, Taipaleenmäki E, Zhang Y, Städler B. A Polymer Chemistry Point of View on Mucoadhesion and Mucopenetration. Macromol Biosci 2017; 17. [PMID: 28675773 DOI: 10.1002/mabi.201700060] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 06/07/2017] [Indexed: 12/20/2022]
Abstract
Although oral is the preferred route of administration of pharmaceutical formulations, the long-standing challenge for medically active compounds to efficiently cross the mucus layer barrier limits its wider applicability. Efforts in nanomedicine to overcome this hurdle consider mucoadhesive and mucopenetrating drug carriers by selectively designing (macromolecular) building blocks. This review highlights and critically discusses recent strategies developed in this context including poly(ethylene glycol)-based modifications, cationic and thiolated polymers, as well as particles with high charge density, zeta-potential shifting ability, or mucolytic properties. The latest advances in ex vivo test platforms are also reviewed.
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Affiliation(s)
- Philipp Schattling
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav-Wieds Vej 14, 8000, Aarhus, Denmark
| | - Essi Taipaleenmäki
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav-Wieds Vej 14, 8000, Aarhus, Denmark
| | - Yan Zhang
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav-Wieds Vej 14, 8000, Aarhus, Denmark
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav-Wieds Vej 14, 8000, Aarhus, Denmark
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239
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Catechol-Based Hydrogel for Chemical Information Processing. Biomimetics (Basel) 2017; 2:biomimetics2030011. [PMID: 31105174 PMCID: PMC6352696 DOI: 10.3390/biomimetics2030011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 06/21/2017] [Accepted: 06/23/2017] [Indexed: 01/23/2023] Open
Abstract
Catechols offer diverse properties and are used in biology to perform various functions that range from adhesion (e.g., mussel proteins) to neurotransmission (e.g., dopamine), and mimicking the capabilities of biological catechols have yielded important new materials (e.g., polydopamine). It is well known that catechols are also redox-active and we have observed that biomimetic catechol-modified chitosan films are redox-active and possess interesting molecular electronic properties. In particular, these films can accept, store and donate electrons, and thus offer redox-capacitor capabilities. We are enlisting these capabilities to bridge communication between biology and electronics. Specifically, we are investigating an interactive redox-probing approach to access redox-based chemical information and convert this information into an electrical modality that facilitates analysis by methods from signal processing. In this review, we describe the broad vision and then cite recent examples in which the catechol–chitosan redox-capacitor can assist in accessing and understanding chemical information. Further, this redox-capacitor can be coupled with synthetic biology to enhance the power of chemical information processing. Potentially, the progress with this biomimetic catechol–chitosan film may even help in understanding how biology uses the redox properties of catechols for redox signaling.
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240
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Balakrishnan B, Soman D, Payanam U, Laurent A, Labarre D, Jayakrishnan A. A novel injectable tissue adhesive based on oxidized dextran and chitosan. Acta Biomater 2017; 53:343-354. [PMID: 28131944 DOI: 10.1016/j.actbio.2017.01.065] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 01/06/2017] [Accepted: 01/23/2017] [Indexed: 02/02/2023]
Abstract
A surgical adhesive that can be used in different surgical situations with or without sutures is a surgeons' dream and yet none has been able to fulfill many such demanding requirements. It was therefore a major challenge to develop an adhesive biomaterial that stops bleeding and bond tissues well, which at the same time is non-toxic, biocompatible and yet biodegradable, economically viable and appealing to the surgeon in terms of the simplicity of application in complex surgical situations. With this aim, we developed an in situ setting adhesive based on biopolymers such as chitosan and dextran. Dextran was oxidized using periodate to generate aldehyde functions on the biopolymer and then reacted with chitosan hydrochloride. Gelation occurred instantaneously upon mixing these components and the resulting gel showed good tissue adhesive properties with negligible cytotoxicity and minimal swelling in phosphate buffered saline (PBS). Rheology analysis confirmed the gelation process by demonstrating storage modulus having value higher than loss modulus. Adhesive strength was in the range 200-400gf/cm2 which is about 4-5 times more than that of fibrin glue at comparable setting times. The adhesive showed burst strength in the range of 400-410mm of Hg which should make the same suitable as a sealant for controlling bleeding in many surgical situations even at high blood pressure. Efficacy of the adhesive as a hemostat was demonstrated in a rabbit liver injury model. Histological features after two weeks were comparable to that of commercially available BioGlue®. The adhesive also demonstrated its efficacy as a drug delivery vehicle. The present adhesive could function without the many toxicity and biocompatibility issues associated with such products. STATEMENT OF SIGNIFICANCE Though there are many tissue adhesives available in market, none are free of shortcomings. The newly developed surgical adhesive is a 2-component adhesive system based on time-tested, naturally occurring polysaccharides such as chitosan and dextran which are both biocompatible and biodegradable. Simple polymer modification has been carried out on both polysaccharides so that when aqueous solutions of both are mixed, the solutions gel in less than 10s and forms an adhesive that seals a variety of incisions. The strength of the adhesive is over 5-times the strength of commercially available Fibrin glue and is more tissue compliant than BioGlue®. This adhesive biomaterial showed excellent tissue bonding, was hemostatic, biocompatible and biodegradable. The significance of this work lies on the features of the developed tissue adhesive that it stops bleeding, bond the tissues well, can act as a drug delivery vehicle and would appeal to the surgeon in terms of the simplicity of application in complex surgical situations. There is no need for special delivery systems for application of this adhesive. The two-component adhesive can be applied one over the other using syringes. There is also no need for light curing with UV or visible light and the gelation between the two components spontaneously takes place on application leading to excellent tissue bonding.
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241
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Han L, Lu X, Liu K, Wang K, Fang L, Weng LT, Zhang H, Tang Y, Ren F, Zhao C, Sun G, Liang R, Li Z. Mussel-Inspired Adhesive and Tough Hydrogel Based on Nanoclay Confined Dopamine Polymerization. ACS NANO 2017; 11:2561-2574. [PMID: 28245107 DOI: 10.1021/acsnano.6b05318] [Citation(s) in RCA: 494] [Impact Index Per Article: 70.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Adhesive hydrogels are attractive biomaterials for various applications, such as electronic skin, wound dressing, and wearable devices. However, fabricating a hydrogel with both adequate adhesiveness and excellent mechanical properties remains a challenge. Inspired by the adhesion mechanism of mussels, we used a two-step process to develop an adhesive and tough polydopamine-clay-polyacrylamide (PDA-clay-PAM) hydrogel. Dopamine was intercalated into clay nanosheets and limitedly oxidized between the layers, resulting in PDA-intercalated clay nanosheets containing free catechol groups. Acrylamide monomers were then added and in situ polymerized to form the hydrogel. Unlike previous single-use adhesive hydrogels, our hydrogel showed repeatable and durable adhesiveness. It adhered directly on human skin without causing an inflammatory response and was easily removed without causing damage. The adhesiveness of this hydrogel was attributed to the presence of enough free catechol groups in the hydrogel, which were created by controlling the oxidation process of the PDA in the confined nanolayers of clay. This mimicked the adhesion mechanism of the mussels, which maintain a high concentration of catechol groups in the confined nanospace of their byssal plaque. The hydrogel also displayed superior toughness, which resulted from nanoreinforcement by clay and PDA-induced cooperative interactions with the hydrogel networks. Moreover, the hydrogel favored cell attachment and proliferation, owning to the high cell affinity of PDA. Rat full-thickness skin defect experiments demonstrated that the hydrogel was an excellent dressing. This free-standing, adhesive, tough, and biocompatible hydrogel may be more convenient for surgical applications than adhesives that involve in situ gelation and extra agents.
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Affiliation(s)
- Lu Han
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
| | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University , Chengdu 610064, Sichuan, China
| | - Kezhi Liu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University , Chengdu 610031, Sichuan, China
| | - Kefeng Wang
- National Engineering Research Center for Biomaterials, Genome Research Center for Biomaterials, Sichuan University , Chengdu 610064, Sichuan, China
| | - Liming Fang
- Department of Polymer Science and Engineering, School of Materials Science and Engineering, South China University of Technology of China , Guangzhou 510641, China
| | - Lu-Tao Weng
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Hongping Zhang
- Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials Science and Engineering, Southwest University of Science and Technology , Mianyang 621010, China
| | - Youhong Tang
- Centre for NanoScale Science and Technology and School of Computer Science, Engineering, and Mathematics, Flinders University , Adelaide 5042, South Australia, Australia
| | - Fuzeng Ren
- Department of Materials Science and Engineering, South University of Science and Technology , Shenzhen, Guangdong 518055, China
| | - Cancan Zhao
- Department of Materials Science and Engineering, South University of Science and Technology , Shenzhen, Guangdong 518055, China
| | - Guoxing Sun
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Rui Liang
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
| | - Zongjin Li
- Department of Chemical and Biomolecular Engineering, Materials Characterisation and Preparation Facility, Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology , Hong Kong, China
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242
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Lv F, Cong X, Tang W, Han Y, Tang Y, Liu Y, Su L, Liu M, Jin M, Yi Z. Novel hemostatic agents based on gelatin-microbial transglutaminase mix. SCIENCE CHINA-LIFE SCIENCES 2017; 60:397-403. [PMID: 28321657 DOI: 10.1007/s11427-015-9019-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 01/17/2017] [Indexed: 12/17/2022]
Abstract
Hemostasis is a major challenge in surgical procedures and traumas. Conventional hemostatic methods have limited efficacy and may cause additional tissue damage. In this study, we designed a novel hemostatic agent based on the in situ gel formation of gelatin cross-linked by a novel microbial transglutaminase (mTGase), in which the amino acid sequences differed from commercial mTGases. The new hemostatic agent showed the same biochemical crosslinking chemistry as the final stages of the blood coagulation cascade while using gelatin as a "structural" protein (rather than fibrin) and a calcium-independent mTGase as the crosslinking catalyst (rather than factor XIIIa). In rat liver hemostasis models, the hemostatic agent not only showed a similar hemostatic effect as that of SURGIFLO® (positive control), but also stronger adhesion strength and elasticity than SURGIFLO®. Therefore, this biomimetic gelatin-mTGase mix hemostatic is a novel and effective surgical sealant.
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Affiliation(s)
- Fang Lv
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Xiaonan Cong
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Wenshu Tang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Yiming Han
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Yu Tang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Yongrui Liu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Liqiang Su
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Mingyao Liu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Mingfei Jin
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China.
| | - Zhengfang Yi
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China.
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243
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Wang Z, Kang H, Zhang W, Zhang S, Li J. Improvement of Interfacial Adhesion by Bio-Inspired Catechol-Functionalized Soy Protein with Versatile Reactivity: Preparation of Fully Utilizable Soy-Based Film. Polymers (Basel) 2017; 9:E95. [PMID: 30970774 PMCID: PMC6432458 DOI: 10.3390/polym9030095] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/02/2017] [Indexed: 11/29/2022] Open
Abstract
The development of materials based on renewable resources with enhanced mechanical and physicochemical properties is hampered by the abundance of hydrophilic groups because of their structural instability. Bio-inspired from the strong adhesion ability of mussel proteins, renewable and robust soy-based composite films were fabricated from two soybean-derived industrial materials: soluble soybean polysaccharide (SSPS) and catechol-functionalized soy protein isolate (SPI-CH). The conjugation of SPI with multiple catechol moieties as a versatile adhesive component for SSPS matrix efficiently improved the interfacial adhesion between each segment of biopolymer. The biomimetic adherent catechol moieties were successfully bonded in the polymeric network based on catechol crosslinking chemistry through simple oxidative coupling and/or coordinative interaction. A combination of H-bonding, strong adhesion between the SPI-CH conjugation and SSPS matrix resulted in remarkable enhancements for mechanical properties. It was found that the tensile strength and Young's modulus was improved from 2.80 and 17.24 MPa of unmodified SP film to 4.04 and 97.22 MPa of modified one, respectively. More importantly, the resultant films exhibited favorable water resistance and gas (water vapor) barrier performances. The results suggested that the promising way improved the phase adhesion of graft copolymers using catechol-functionalized polymers as versatile adhesive components.
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Affiliation(s)
- Zhong Wang
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Haijiao Kang
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Wei Zhang
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Shifeng Zhang
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Jianzhang Li
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
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Mucoadhesive chitosan hydrogels as rectal drug delivery vessels to treat ulcerative colitis. Acta Biomater 2017; 48:247-257. [PMID: 27769943 DOI: 10.1016/j.actbio.2016.10.026] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 10/11/2016] [Accepted: 10/17/2016] [Indexed: 01/17/2023]
Abstract
Mucoadhesive drug delivery systems stick to mucosal tissues and prolong the local retention time of drugs. Since the colon is covered by a mucosal layer, mucoadhesive rectal formulations may improve treatment of such diseases as hypertension or colon cancer. Ulcerative colitis (UC) is an inflammatory bowel disease characterized by chronic inflammation of the colonic mucosa. It is commonly treated with sulfasalazine (SSZ), which is metabolized by the intestinal flora into the therapeutic 5-aminosalicylic acid (5-ASA) and a toxic by-product sulfapyridine (SP). SSZ can be administered orally or rectally. The latter route avoids unintended absorption of the drug or its degradation products in the upper gastrointestinal tract, but often fails due to limited retention time. Here, we propose a mucoadhesive hydrogel to improve the efficacy of rectal SSZ administration. The gel is made of catechol modified-chitosan (Cat-CS) crosslinked by genipin. After loading the gel with SSZ, we evaluated its efficacy in a mouse model of UC. Compared to oral SSZ treatment, rectal SSZ/Cat-CS delivery was more therapeutic, showed equivalent histological scores, and induced a lower plasma concentration of the potentially toxic SP by-product. These results show SSZ/Cat-CS rectal hydrogels are more effective and safer formulations for UC treatment than oral SSZ. STATEMENT OF SIGNIFICANCE Ulcerative colitis affects the colon by causing chronic inflammation on the mucosa. One of the most common drugs to treat mild to moderate UC is sulfasalazine, which can be administrated both orally and rectally. Rectal formulations are preferable, since their therapeutic effect happens topically, and they prevent side effects related to absorption of the drug in the small intestine. However, the efficacy of rectal sulfasalazine formulations is decreased by their limited colon residence time. Here we propose a chitosan-catechol mucoadhesive gel that allows delivering sulfasalazine more effectively and safely than oral administration. Our results bring new insights into the field of mussel-inspired catechol hydrogels, showing their potential as drug delivery systems to treat a widespread disease such as ulcerative colitis.
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245
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Huang X, Bao X, Wang Z, Hu Q. A novel silver-loaded chitosan composite sponge with sustained silver release as a long-lasting antimicrobial dressing. RSC Adv 2017. [DOI: 10.1039/c7ra06430f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
A new kind of chitosan-based sponge with sustained silver release was prepared by loading CCS-AgNPs into chitosan matrix through interaction between catechol and chitosan, which is considered as a potential candidate for wound healing dressings.
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Affiliation(s)
- Xiaofei Huang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Xiaojiong Bao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhengke Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qiaoling Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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246
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Yang X, Liu W, Li N, Wang M, Liang B, Ullah I, Luis Neve A, Feng Y, Chen H, Shi C. Design and development of polysaccharide hemostatic materials and their hemostatic mechanism. Biomater Sci 2017; 5:2357-2368. [DOI: 10.1039/c7bm00554g] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The formation of stable blood clots or hemostasis is essential to prevent major blood loss and death from excessive bleeding.
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247
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Wang H, Qian J, Ding F. Recent advances in engineered chitosan-based nanogels for biomedical applications. J Mater Chem B 2017; 5:6986-7007. [DOI: 10.1039/c7tb01624g] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent progress in the preparation and biomedical applications of engineered chitosan-based nanogels has been comprehensively reviewed.
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Affiliation(s)
- Hongxia Wang
- School of Printing and Packaging, Wuhan University
- Wuhan 430072
- P. R. China
| | - Jun Qian
- School of Printing and Packaging, Wuhan University
- Wuhan 430072
- P. R. China
| | - Fuyuan Ding
- School of Printing and Packaging, Wuhan University
- Wuhan 430072
- P. R. China
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248
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Kim M, Chung H. Photo-responsive bio-inspired adhesives: facile control of adhesion strength via a photocleavable crosslinker. Polym Chem 2017. [DOI: 10.1039/c7py01535f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photo-responsive bio-inspired terpolymer adhesives consisting of a zwitterionic polymer, catechol moiety, and nitrobenzyl crosslinker was synthesized for convenient control of adhesion strength under UV irradiation.
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Affiliation(s)
- Minkyu Kim
- Department of Chemical and Biomedical Engineering
- Florida State University
- Tallahassee
- USA
| | - Hoyong Chung
- Department of Chemical and Biomedical Engineering
- Florida State University
- Tallahassee
- USA
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249
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Kang H, Liu X, Zhang S, Li J. Functionalization of halloysite nanotubes (HNTs) via mussel-inspired surface modification and silane grafting for HNTs/soy protein isolate nanocomposite film preparation. RSC Adv 2017. [DOI: 10.1039/c7ra02987j] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A multiple surface modification of halloysite nanotube to reinforce the soy protein isolate films was developed to pursue sustainable goals.
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Affiliation(s)
- Haijiao Kang
- MOE Key Laboratory of Wooden Material Science and Application
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Laboratory of Wood Science and Engineering
| | - Xiaorong Liu
- MOE Key Laboratory of Wooden Material Science and Application
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Laboratory of Wood Science and Engineering
| | - Shifeng Zhang
- MOE Key Laboratory of Wooden Material Science and Application
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Laboratory of Wood Science and Engineering
| | - Jianzhang Li
- MOE Key Laboratory of Wooden Material Science and Application
- Beijing Forestry University
- Beijing 100083
- P. R. China
- Beijing Key Laboratory of Wood Science and Engineering
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250
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Yasasvini S, Anusa RS, VedhaHari BN, Prabhu PC, RamyaDevi D. Topical hydrogel matrix loaded with Simvastatin microparticles for enhanced wound healing activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 72:160-167. [PMID: 28024572 DOI: 10.1016/j.msec.2016.11.038] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/08/2016] [Accepted: 11/10/2016] [Indexed: 01/22/2023]
Abstract
A prolonged release drug delivery system was developed by loading Simvastatin-chitosan microparticles into poly vinyl alcohol (PVA) hydrogels for enhanced wound healing efficiency. The microparticles prepared by ionic gelation method with varying composition of chitosan and surfactants (Tween 80/Pluronic F-127) were optimized for entrapment efficiency, morphology and drug-polymer interactions. Microparticles prepared with 0.3% between 80 and 0.5:5 chitosan: drug ratio showed maximum entrapment efficiency of 82% with spherical morphology and mild interaction between drug and chitosan. 5% PVA solutions loaded with pure drug and drug loaded microparticles at three different doses (2.5mg, 5mg and 10mg equivalent of drug) were chemically cross linked using gluteraldehyde and HCl. The formulated hydrogels were optimized for swelling, in vitro release behavior and in vivo wound healing effect. Hydrogels containing 2.5mg equivalent dose of Simvastatin microparticles exhibited maximum cumulative percentage drug release of 92% (n=3) at the end of 7days. The in vitro drug release data was supported by the higher swelling index of the low dose hydrogels. The in vivo wound healing study was performed using Wistar rats (n=30, 5 groups with 6 animals in each group) for the formulated hydrogels (at 3 doses) and compared with the untreated animals and the positive control group treated with conventional topical Simvastatin ointment (1%). The wound healing effect was comparable to the in vitro results, wherein the animals treated with low dose hydrogels (replaced every 7days) exhibited considerable reduction in the wound area compared to medium and high dose hydrogels. Statistically significant difference (P<0.05) was observed in the wound area of the animals treated with low dose hydrogels compared to 1% ointment and untreated animals, as estimated by two-way ANOVA. The histopathology images of the different groups of animals also displayed the comparative changes in the wound healing process. Hence, the incorporation of Simvastatin-chitosan microparticles in PVA hydrogels has demonstrated significant wound healing efficiency at optimum dose.
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Affiliation(s)
- S Yasasvini
- School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - R S Anusa
- School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - B N VedhaHari
- School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - P C Prabhu
- Central Animal Facility, SASTRA University, Thanjavur 613401, Tamil Nadu, India
| | - D RamyaDevi
- School of Chemical and Biotechnology, SASTRA University, Thanjavur 613401, Tamil Nadu, India.
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