1
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Zhao T, Ma H, Liu Y, Chen Z, Shi Q, Ning L. Interfacial interactions between spider silk protein and cellulose studied by molecular dynamics simulation. J Mol Model 2024; 30:156. [PMID: 38693294 DOI: 10.1007/s00894-024-05945-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 04/16/2024] [Indexed: 05/03/2024]
Abstract
CONTEXT Due to their excellent biocompatibility and degradability, cellulose/spider silk protein composites hold a significant value in biomedical applications such as tissue engineering, drug delivery, and medical dressings. The interfacial interactions between cellulose and spider silk protein affect the properties of the composite. Therefore, it is important to understand the interfacial interactions between spider silk protein and cellulose to guide the design and optimization of composites. The study of the adsorption of protein on specific surfaces of cellulose crystal can be very complex using experimental methods. Molecular dynamics simulations allow the exploration of various physical and chemical changes at the atomic level of the material and enable an atomic description of the interactions between cellulose crystal planes and spider silk protein. In this study, molecular dynamics simulations were employed to investigate the interfacial interactions between spider silk protein (NTD) and cellulose surfaces. Findings of RMSD, RMSF, and secondary structure showed that the structure of NTD proteins remained unchanged during the adsorption process. Cellulose contact numbers and hydrogen bonding trends on different crystalline surfaces suggest that van der Waals forces and hydrogen bonding interactions drive the binding of proteins to cellulose. These findings reveal the interaction between cellulose and protein at the molecular level and provide theoretical guidance for the design and synthesis of cellulose/spider silk protein composites. METHODS MD simulations were all performed using the GROMACS-5.1 software package and run with CHARMM36 carbohydrate force field. Molecular dynamics simulations were performed for 500 ns for the simulated system.
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Affiliation(s)
- Tengfei Zhao
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, People's Republic of China
| | - Huaiqin Ma
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, People's Republic of China
| | - Yuxi Liu
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, People's Republic of China
| | - Zhenjuan Chen
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, People's Republic of China
| | - Qingwen Shi
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, People's Republic of China
| | - Lulu Ning
- Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, People's Republic of China.
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2
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Yang F, Cai B, Gu H, Wang F. Comparative Investigation on the Structure and Properties of Protein Films from Domestic and Wild Silkworms through Ultrasonic Regeneration. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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3
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Xiaoli Z, Jian Z, Peiran T, Xiang C. The latest progress of tympanic membrane repair materials. Am J Otolaryngol 2022; 43:103408. [DOI: 10.1016/j.amjoto.2022.103408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 02/13/2022] [Indexed: 11/01/2022]
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4
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Aye SSS, Zhang ZH, Yu X, Yu H, Ma WD, Yang K, Liu X, Li J, Li JL. Silk Hydrogel Electrostatically Functionalized with a Polycationic Antimicrobial Peptide: Molecular Interactions, Gel Properties, and Antimicrobial Activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:50-61. [PMID: 34963282 DOI: 10.1021/acs.langmuir.1c01312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Functionalization of silk fibroin hydrogel with antimicrobial activity is essential for promoting the applications of this excellent biomaterial. In this work, a simple approach based on electrostatic interaction is adopted to produce antimicrobial silk hydrogel containing an antimicrobial peptide (AMP), polymyxin B, an important last-line antibiotic to treat multidrug-resistant bacterial superbugs. The polycationic property of this peptide and the negative charge of silk fibroin lead to strong interactions between them, as demonstrated by changes in nanofibril structure, gelation kinetics, ζ-potential, fluorescence emission, and rheological properties of the gel. The hydrogels loaded with polymyxin B demonstrated antimicrobial activity against two Gram-negative bacterial strains. A combination of the results from the different characterizations suggests that the optimal molar ratio of polymyxin B to silk fibroin is 1:2.5. As most AMPs are cationic, this electrostatic approach is suitable for the straightforward functionalization of inert silk hydrogel with other AMPs.
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Affiliation(s)
- San Seint Seint Aye
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217, Australia
| | - Zhi-Hong Zhang
- Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, P. R. China
| | - Xin Yu
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217, Australia
| | - Heidi Yu
- Biomedicine Discovery Institute, Infection & Immunity Program and Department of Microbiology, Monash University, Melbourne, Victoria 3800, Australia
| | - Wen-Dong Ma
- Biomedicine Discovery Institute, Infection & Immunity Program and Department of Microbiology, Monash University, Melbourne, Victoria 3800, Australia
| | - Kai Yang
- Center for Soft Condensed Matter Physics and Interdisciplinary Research & School of Physical Science and Technology, Soochow University, Suzhou 215006, P. R. China
| | - Xin Liu
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217, Australia
| | - Jian Li
- Biomedicine Discovery Institute, Infection & Immunity Program and Department of Microbiology, Monash University, Melbourne, Victoria 3800, Australia
| | - Jing-Liang Li
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3217, Australia
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5
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Santos FV, Yoshioka SA, Branciforti MC. Large‐area thin films of silk fibroin prepared by two methods with formic acid as solvent and glycerol as plasticizer. J Appl Polym Sci 2021. [DOI: 10.1002/app.50759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Francisco Vieira Santos
- Department of Materials Engineering, Sao Carlos School of Engineering University of Sao Paulo Sao Carlos Brasil Brazil
| | | | - Marcia Cristina Branciforti
- Department of Materials Engineering, Sao Carlos School of Engineering University of Sao Paulo Sao Carlos Brasil Brazil
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Paterson TE, Dhowre HS, Villanueva D, Holland JW, Reddy Kethiri A, Singh V, Claeyssens F, MacNeil S, Ortega Asencio I. Tuning Electrospun Substrate Stiffness for the Fabrication of a Biomimetic Amniotic Membrane Substitute for Corneal Healing. ACS APPLIED BIO MATERIALS 2021; 4:5638-5649. [DOI: 10.1021/acsabm.1c00436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Thomas E. Paterson
- Automatic Control and Systems Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom
| | - Hala S. Dhowre
- School of Dentistry, University of Sheffield, Sheffield S10 2TA, United Kingdom
| | - Danilo Villanueva
- School of Dentistry, University of Sheffield, Sheffield S10 2TA, United Kingdom
| | - Joseph W. Holland
- School of Dentistry, University of Sheffield, Sheffield S10 2TA, United Kingdom
| | - Abhinav Reddy Kethiri
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad 500034, India
| | - Vivek Singh
- Centre for Ocular Regeneration, Prof. Brien Holden Eye Research Centre, L V Prasad Eye Institute, Hyderabad 500034, India
| | - Frederik Claeyssens
- The Kroto Research Institute, North Campus, University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - Sheila MacNeil
- The Kroto Research Institute, North Campus, University of Sheffield, Sheffield S3 7HQ, United Kingdom
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Zhang X, Xiao L, Ding Z, Lu Q, Kaplan DL. Fragile-Tough Mechanical Reversion of Silk Materials via Tuning Supramolecular Assembly. ACS Biomater Sci Eng 2021; 7:2337-2345. [PMID: 33835795 DOI: 10.1021/acsbiomaterials.1c00181] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Regenerated silk nanofibers are interesting as protein-based material building blocks due to their unique structure and biological origin. Here, a new strategy based on control of supramolecular assembly was developed to regulate interactions among silk nanofibers by changing the solvent, achieving tough mechanical features for silk films. Formic acid was used to replace water related to charge repulsion of silk nanofibers in solution, inducing interactions among the nanofibers. The films formed under these conditions had an elastic modulus of 3.4 ± 0.3 GPa, an ultimate tensile strength of 76.9 ± 1.6 MPa, and an elongation at break of 3.5 ± 0.1%, while the materials formed from aqueous solutions remained fragile. The mechanical performance of the formic acid-derived nanofiber films was further improved through post-stretching or via the addition of graphene. In addition, the silk nanofiber films could be functionalized with various bioactive ingredients such as curcumin. These new silk nanofiber films with a unique combination of mechanical properties and functions provide new biomaterials achieved using traditional solvents and processes through insight and control of their assembly mechanisms in solution.
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Affiliation(s)
- Xiaoyi Zhang
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Liying Xiao
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Zhaozhao Ding
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Qiang Lu
- National Engineering Laboratory for Modern Silk & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
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Uddin MG, Allardyce BJ, Rashida N, Rajkhowa R. Mechanical, structural and biodegradation characteristics of fibrillated silk fibres and papers. Int J Biol Macromol 2021; 179:20-32. [PMID: 33667557 DOI: 10.1016/j.ijbiomac.2021.02.211] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/16/2021] [Accepted: 02/27/2021] [Indexed: 11/15/2022]
Abstract
We characterised fibres and papers of microfibrillated silk from Bombyx mori produced by mechanical and enzymatic process. Milling increased the specific surface area of fibres from 1.5 to 8.5 m2/g and that enzymatic pre-treatment increased it further to 16.5 m2/g. These fibrils produced a uniform, significantly strong (tenacity 55 Nm/g) and stiff (Young's modulus > 2 GPa) papers. Enzymatic pre-treatment did not reduce molecular weight and tensile strength of papers but significantly improved fibrillation. Silk remained highly crystalline throughout the fibrillation process. Protease biodegradation was more rapid after fibrillation. Biodegradation was impacted by structural change due to enzymatic pre-treatment during the fibrillation. Biodegraded silk had much higher thermal degradation temperature. The unique combination of high strength, slow yet predicable degradation and controllable wicking properties make the materials ideally suited to biomedical and healthcare applications.
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Affiliation(s)
- Mohammad Gias Uddin
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | | | - Nigar Rashida
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Rangam Rajkhowa
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia.
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9
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Aleemardani M, Bagher Z, Farhadi M, Chahsetareh H, Najafi R, Eftekhari B, Seifalian A. Can Tissue Engineering Bring Hope to the Development of Human Tympanic Membrane? TISSUE ENGINEERING PART B-REVIEWS 2021; 27:572-589. [PMID: 33164696 DOI: 10.1089/ten.teb.2020.0176] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The tympanic membrane (TM), more commonly known as the eardrum, consists of a thin layer of tissue in the human ear that receives sound vibrations from outside of the body and transmits them to the auditory ossicles. The TM perforations (TMPs) are a common ontological condition, which in some cases can result in permanent hearing loss. Despite the spontaneous healing capacity of the TM to regenerate in the majority of cases of acute perforation, chronic perforations require surgical interventions. However, the disadvantages of the surgical procedure include infection, anesthetic risks, and high failure of graft patency. The tissue engineering strategy, which includes the applications of a three-dimensional (3D) scaffold, cells, and biomolecules or a combination of them for the closure of chronic perforation, has been considered as an emerging treatment. Using this approach, emerging products are currently under development to regenerate the TM structure and its properties. This research aimed to highlight the problems with the current methods of TMP treatment, and critically evaluate the tissue engineering approaches, which may overcome these drawbacks. The focus of this review is on recent literature to critically discuss the emerging advanced materials used as a 3D scaffold in the development of a TM with cellular engineering, biomolecules, cells, and the fabrications of the TM and its pathway to the clinical application. In this review, we discuss the properties of TM and the advantages and disadvantages of the current clinical products for repair and replacement of the TM. Furthermore, we provide an overview of the in vitro and preclinical studies of emerging products over the past 5 years. The results of recent preclinical studies suggest that the tissue engineering field holds significant promise.
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Affiliation(s)
- Mina Aleemardani
- Biomedical Engineering Department, Amirkabir University of Technology, Tehran, Iran
| | - Zohreh Bagher
- ENT and Head & Neck Research Centre and Department, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Farhadi
- ENT and Head & Neck Research Centre and Department, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Hadi Chahsetareh
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran
| | - Roghayeh Najafi
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran
| | - Behnaz Eftekhari
- Biomedical Engineering Department, Amirkabir University of Technology, Tehran, Iran
| | - Alexander Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd.), London BioScience Innovation Centre, London, United Kingdom
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10
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Development of robust, ultra-smooth, flexible and transparent regenerated silk composite films for bio-integrated electronic device applications. Int J Biol Macromol 2021; 176:498-509. [PMID: 33571588 DOI: 10.1016/j.ijbiomac.2021.02.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 02/05/2021] [Accepted: 02/06/2021] [Indexed: 01/21/2023]
Abstract
Regenerated Silk Fibroin (RSF) films are considered promising substrate candidates primarily in the field of bio-integrated electronic device applications. The key issues that ought to be addressed to exploit the inherent advantages of silk thin films include enhancing their flexibility and chemical durability. Such films find a plethora of applications, the significant one being conformal, transparent microelectrode arrays. Elevated temperatures that are regularly used in lithographic processes tend to dehydrate RSF films, making them brittle. Furthermore, the solvents/etchants used in typical device fabrication results in the formation of micro-cracks. This paper addressed both these issues by developing composite films and studying the effect of biodegradable additives in enhancing flexibility and chemical durability without compromising on optical transparency and surface smoothness. Through our rigorous experimentation, regenerated silk blended with Polyvinyl Alcohol (Silk/PVA) is identified as the composite for achieving the objectives. Furthermore, the Cyto-compatibility studies suggest that Silk/PVA, along with all other silk composites, have shown above 80% cell viability, as verified using L929 fibroblast cell lines. Going a step further, we demonstrated the successful patterning of 32 channel optically transparent microelectrode array (MEA) pattern, with a minimum feature size of 5 μm above the free-standing and optically transparent Silk/PVA composite film.
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11
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Yao Y, Allardyce BJ, Rajkhowa R, Guo C, Mu X, Hegh D, Zhang J, Lynch P, Wang X, Kaplan DL, Razal JM. Spinning Regenerated Silk Fibers with Improved Toughness by Plasticizing with Low Molecular Weight Silk. Biomacromolecules 2020; 22:788-799. [PMID: 33337131 DOI: 10.1021/acs.biomac.0c01545] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Low-molecular weight (LMW) silk was utilized as a LMW silk plasticizer for regenerated silk, generating weak physical crosslinks between high-molecular weight (HMW) silk chains in the amorphous regions of a mixed solution of HMW/LMW silk. The plasticization effect of LMW silk was investigated using mechanical testing, Raman spectroscopy, and wide-angle X-ray scattering (WAXS). Small amounts (10%) of LMW silk resulted in a 19.4% enhancement in fiber extensibility and 37.8% increase in toughness. The addition of the LMW silk facilitated the movement of HMW silk chains during drawing, resulting in an increase in molecular chain orientation when compared with silk spun from 100% HMW silk solution. The best regenerated silk fibers produced in this work had an orientation factor of 0.94 and crystallinity of 47.82%, close to the values of natural degummedBombyx mori silk fiber. The approach and mechanism elucidated here can facilitate artificial silk systems with enhanced properties.
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Affiliation(s)
- Ya Yao
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | | | - Rangam Rajkhowa
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Chengchen Guo
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Xuan Mu
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Dylan Hegh
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Jizhen Zhang
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Peter Lynch
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Xungai Wang
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Joselito M Razal
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
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12
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3D printing of silk microparticle reinforced polycaprolactone scaffolds for tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111433. [PMID: 33255027 DOI: 10.1016/j.msec.2020.111433] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 08/19/2020] [Accepted: 08/21/2020] [Indexed: 12/13/2022]
Abstract
Polycaprolactone (PCL) scaffolds have been widely investigated for tissue engineering applications, however, they exhibit poor cell adhesion and mechanical properties. Subsequently, PCL composites have been produced to improve the material properties. This study utilises a natural material, Bombyx mori silk microparticles (SMP) prepared by milling silk fibre, to produce a composite to enhance the scaffolds properties. Silk is biocompatible and biodegradable with excellent mechanical properties. However, there are no studies using SMPs as a reinforcing agent in a 3D printed thermoplastic polymer scaffold. PCL/SMP (10, 20, 30 wt%) composites were prepared by melt blending. Rheological analysis showed that SMP loading increased the shear thinning and storage modulus of the material. Scaffolds were fabricated using a screw-assisted extrusion-based additive manufacturing system. Scanning electron microscopy and X-ray microtomography was used to determine scaffold morphology. The scaffolds had high interconnectivity with regular printed fibres and pore morphologies within the designed parameters. Compressive mechanical testing showed that the addition of SMP significantly improved the compressive Young's modulus of the scaffolds. The scaffolds were more hydrophobic with the inclusion of SMP which was linked to a decrease in total protein adsorption. Cell behaviour was assessed using human adipose derived mesenchymal stem cells. A cytotoxic effect was observed at higher particle loading (30 wt%) after 7 days of culture. By day 21, 10 wt% loading showed significantly higher cell metabolic activity and proliferation, high cell viability, and cell migration throughout the scaffold. Calcium mineral deposition was observed on the scaffolds during cell culture. Large calcium mineral deposits were observed at 30 wt% and smaller calcium deposits were observed at 10 wt%. This study demonstrates that SMPs incorporated into a PCL scaffold provided effective mechanical reinforcement, improved the rate of degradation, and increased cell proliferation, demonstrating potential suitability for bone tissue engineering applications.
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13
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Emonson NS, Eyckens DJ, Allardyce BJ, Hendlmeier A, Stanfield MK, Soulsby LC, Stojcevski F, Henderson LC. Using In Situ Polymerization to Increase Puncture Resistance and Induce Reversible Formability in Silk Membranes. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2252. [PMID: 32422884 PMCID: PMC7287606 DOI: 10.3390/ma13102252] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/08/2020] [Accepted: 05/11/2020] [Indexed: 11/17/2022]
Abstract
Silk fibroin is an excellent biopolymer for application in a variety of areas, such as textiles, medicine, composites and as a novel material for additive manufacturing. In this work, silk membranes were surface modified by in situ polymerization of aqueous acrylic acid, initiated by the reduction of various aryldiazonium salts with vitamin C. Treatment times of 20 min gave membranes which possessed increased tensile strength, tensile modulus, and showed significant increased resistance to needle puncture (+131%), relative to 'untreated' standards. Most interestingly, the treated silk membranes were able to be reversibly formed into various shapes via the hydration and plasticizing of the surface bound poly(acrylic acid), by simply steaming the modified membranes. These membranes and their unique properties have potential applications in advanced textiles, and as medical materials.
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Affiliation(s)
| | | | | | | | | | | | - Filip Stojcevski
- Carbon Nexus, Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216, Australia; (N.S.E.); (D.J.E.); (B.J.A.); (A.H.); (M.K.S.); (L.C.S.)
| | - Luke C. Henderson
- Carbon Nexus, Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216, Australia; (N.S.E.); (D.J.E.); (B.J.A.); (A.H.); (M.K.S.); (L.C.S.)
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14
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Valente F, Allardyce BJ, Hepburn MS, Wijesinghe P, Redmond SL, Chen J, Kennedy BF, Rajkhowa R, Atlas MD, Wang X, Dilley RJ. Enhancing Resistance of Silk Fibroin Material to Enzymatic Degradation by Cross-Linking Both Crystalline and Amorphous Domains. ACS Biomater Sci Eng 2020; 6:2459-2468. [PMID: 33455319 DOI: 10.1021/acsbiomaterials.9b00873] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Silk fibroin (SF) membranes are finding widespread use as biomaterial scaffolds in a range of tissue engineering applications. The control over SF scaffold degradation kinetics is usually driven by the proportion of SF crystalline domains in the formulation, but membranes with a high β-sheet content are brittle and still contain amorphous domains, which are highly susceptible to enzymatic degradation. In this work, photo-cross-linking of SF using a ruthenium-based method, and with the addition of glycerol, was used to generate robust and flexible SF membranes for long-term tissue engineering applications requiring slow degradation of the scaffolds. The resulting mechanical properties, protein secondary structure, and degradation rate were investigated. In addition, the cytocompatibility and versatility of porous micropatterning of SF films were assessed. The photo-cross-linking reduced the enzymatic degradation of SF in vitro without interfering with the β-sheet content of the SF material, while adding glycerol to the composition grants flexibility to the membranes. By combining these methods, the membrane resistance to protease degradation was significantly enhanced compared to either method alone, and the SF mechanical properties were not impaired. We hypothesize that photo-cross-linking protects the SF amorphous regions from enzymatic degradation and complements the natural protection offered by β-sheets in the crystalline region. Overall, this approach presents broad utility in tissue engineering applications that require a long-term degradation profile and mechanical support.
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Affiliation(s)
- Filippo Valente
- Ear Science Institute Australia; Subiaco, Australia and Ear Sciences Centre, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands 6009, Australia
| | | | - Matt S Hepburn
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth 6009, Australia.,Department of Electrical, Electronic and Computer Engineering, School of Engineering, The University of Western Australia, Perth 6009, Australia
| | - Philip Wijesinghe
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth 6009, Australia.,Department of Electrical, Electronic and Computer Engineering, School of Engineering, The University of Western Australia, Perth 6009, Australia.,SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, U.K
| | - Sharon L Redmond
- Ear Science Institute Australia; Subiaco, Australia and Ear Sciences Centre, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands 6009, Australia
| | - Jingyu Chen
- Institute for Frontier Materials, Deakin University, Geelong 3220, Australia
| | - Brendan F Kennedy
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Perth 6009, Australia.,Department of Electrical, Electronic and Computer Engineering, School of Engineering, The University of Western Australia, Perth 6009, Australia
| | - Rangam Rajkhowa
- Institute for Frontier Materials, Deakin University, Geelong 3220, Australia
| | - Marcus D Atlas
- Ear Science Institute Australia; Subiaco, Australia and Ear Sciences Centre, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands 6009, Australia
| | - Xungai Wang
- Institute for Frontier Materials, Deakin University, Geelong 3220, Australia
| | - Rodney J Dilley
- Ear Science Institute Australia; Subiaco, Australia and Ear Sciences Centre, Faculty of Health and Medical Sciences, The University of Western Australia, Nedlands 6009, Australia.,Centre for Cell Therapy and Regenerative Medicine, School of Biomedical Sciences, The University of Western Australia, Nedlands 6009, Australia
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15
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Silk particles, microfibres and nanofibres: A comparative study of their functions in 3D printing hydrogel scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109784. [DOI: 10.1016/j.msec.2019.109784] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 05/17/2019] [Accepted: 05/20/2019] [Indexed: 01/16/2023]
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16
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Mehrabani MG, Karimian R, Rakhshaei R, Pakdel F, Eslami H, Fakhrzadeh V, Rahimi M, Salehi R, Kafil HS. Chitin/silk fibroin/TiO 2 bio-nanocomposite as a biocompatible wound dressing bandage with strong antimicrobial activity. Int J Biol Macromol 2018; 116:966-976. [PMID: 29782987 DOI: 10.1016/j.ijbiomac.2018.05.102] [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: 02/10/2018] [Revised: 05/04/2018] [Accepted: 05/15/2018] [Indexed: 12/16/2022]
Abstract
Interconnected microporous biodegradable and biocompatible chitin/silk fibroin/TiO2 nanocomposite wound dressing with high antibacterial, blood clotting and mechanical strength properties were synthesized using freeze-drying method. The prepared nanocomposite dressings were characterized using SEM, FTIR, and XRD analysis. The prepared nanocomposite dressings showed high porosity above 90% with well-defined interconnected porous construction. Swelling and water uptake of the dressing were 93%, which is great for wound dressing applications. Haemostatic potential of the prepared dressings was studied and the results proved the higher blood clotting ability of the nanocomposites compared to pure components and commercially available products. Besides, cell viability, attachment and proliferation by MTT assay and DAPI staining on HFFF2 cell as a Human Caucasian Foetal Foreskin Fibroblast proved the cytocompatibility nature of the nanocomposite scaffolds with well improved proliferation and cell attachment. To determine the antimicrobial efficiencies, both disc diffusion method and colony counts were performed and results imply that nanocomposite scaffolds have high antimicrobial activity and could successfully inhibit the growth of E. coli, S. aureus, and C. albicans. Moreover, based on these results, the prepared chitin/silk fibroin/TiO2 nanocomposite dressing could serve as a kind of promising wound dressing with great antibacterial and antifungal properties.
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Affiliation(s)
- Mojtaba Ghanbari Mehrabani
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Ramin Karimian
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Rasul Rakhshaei
- Faculty of Chemistry, Department of Organic and Biochemistry, Tabriz University, Tabriz, Iran
| | - Farzaneh Pakdel
- Connective tissues Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hosein Eslami
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahid Fakhrzadeh
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdi Rahimi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Faculty of Chemistry, Department of Organic and Biochemistry, Tabriz University, Tabriz, Iran
| | - Roya Salehi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Samadi Kafil
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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Koh LD, Yeo J, Lee YY, Ong Q, Han M, Tee BCK. Advancing the frontiers of silk fibroin protein-based materials for futuristic electronics and clinical wound-healing (Invited review). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018. [DOI: 10.1016/j.msec.2018.01.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Raynal L, Allardyce BJ, Wang X, Dilley RJ, Rajkhowa R, Henderson LC. Facile and versatile solid state surface modification of silk fibroin membranes using click chemistry. J Mater Chem B 2018; 6:8037-8042. [PMID: 32254922 DOI: 10.1039/c8tb02508h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reported is a fast and versatile protocol to surface modify pre-cast silk membranes targeting tyrosine residues.
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Affiliation(s)
- Laetitia Raynal
- Deakin University
- Institute for Frontier Materials
- Waurn Ponds Campus
- Geelong
- Australia
| | | | - Xungai Wang
- Deakin University
- Institute for Frontier Materials
- Waurn Ponds Campus
- Geelong
- Australia
| | | | - Rangam Rajkhowa
- Deakin University
- Institute for Frontier Materials
- Waurn Ponds Campus
- Geelong
- Australia
| | - Luke C. Henderson
- Deakin University
- Institute for Frontier Materials
- Waurn Ponds Campus
- Geelong
- Australia
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