1
|
Müller M, Wöltje M, Hofmaier M, Tarpara B, Urban B, Aibibu D, Cherif C. In Situ ATR-FTIR Studies on the β-Sheet Formation of Native and Regenerated Bombyx mori Silk Material in Solution and Its Potential for Drug Releasing Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39073396 DOI: 10.1021/acs.langmuir.4c00920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Dynamic attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy at both solutions and coatings of a semicrystalline silk material derived from Bombyx mori was applied to monitor the β-sheet conformation, which is known to correlate with silk protein crystallinity. The secondary structure-sensitive Amide I band was analyzed. Two silk protein samples were studied: native-based silk buffer fibroin (NSF) was extracted from silk glands and regenerated silk fibroin (RSF) was extracted from degummed cocoons. Solutions of both NSF and RSF at 2 mg/mL featured low initial β-sheet contents of 5-12%, which further increased to 47-53% after 24 h. RSF and NSF solutions at 23 mg/mL also featured low initial β-sheet contents of 9-10%, which yet only slightly increased to 16-17% after 24 h. Coatings deposited from RSF solutions showed high surface integrity (Q > 99%) after rinsing in mineralized water, enabling interfacial drug delivery applications. RSF coatings were post-treated with either formic acid (FA) or pure methanol (MeOH) vapor to showcase inducibility of crystalline domains in RSF coatings. Such coatings were loaded with the model antibiotic drugs tetracycline (TCL) and streptomycin (STRP), and the sustained release of TCL was followed in contact with (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid) (HEPES) buffer. RSF/TCL coatings post-treated with formic acid (FA) vapor followed by methanol (MeOH) vapor showed a significantly lower (52%) initial burst of rather hydrophobic TCL compared to untreated RSF/TCL coatings (72%), while no such significant release difference was observed for hydrophilic STRP. This was rationalized by a specific interaction between nonpolar TCL and hydrophobic crystalline RSF domains.
Collapse
Affiliation(s)
- M Müller
- Department Functional Colloidal Materials, Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Department Chemistry and Food Chemistry, TUD Dresden University of Technology, 01062 Dresden, Germany
| | - M Wöltje
- TUD Dresden University of Technology, Institute of Textile Machinery and High-Performance Material Technology, 01062 Dresden, Germany
| | - M Hofmaier
- Department Functional Colloidal Materials, Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Department Chemistry and Food Chemistry, TUD Dresden University of Technology, 01062 Dresden, Germany
| | - B Tarpara
- Department Functional Colloidal Materials, Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany
- Department Processing Technology, Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - B Urban
- Department Functional Colloidal Materials, Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany
| | - D Aibibu
- TUD Dresden University of Technology, Institute of Textile Machinery and High-Performance Material Technology, 01062 Dresden, Germany
| | - C Cherif
- TUD Dresden University of Technology, Institute of Textile Machinery and High-Performance Material Technology, 01062 Dresden, Germany
| |
Collapse
|
2
|
Tan G, Jia T, Qi Z, Lu S. Regenerated Fiber's Ideal Target: Comparable to Natural Fiber. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1834. [PMID: 38673192 PMCID: PMC11050933 DOI: 10.3390/ma17081834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 04/12/2024] [Accepted: 04/13/2024] [Indexed: 04/28/2024]
Abstract
The toughness of silk naturally obtained from spiders and silkworms exceeds that of all other natural and man-made fibers. These insects transform aqueous protein feedstocks into mechanically specialized materials, which represents an engineering phenomenon that has developed over millions of years of natural evolution. Silkworms have become a new research hotspot due to the difficulties in collecting spider silk and other challenges. According to continuous research on the natural spinning process of the silkworm, it is possible to divide the main aspects of bionic spinning into two main segments: the solvent and behavior. This work focuses on the various methods currently used for the spinning of artificial silk fibers to replicate natural silk fibers, providing new insights based on changes in the fiber properties and production processes over time.
Collapse
Affiliation(s)
| | | | | | - Shenzhou Lu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China; (G.T.); (T.J.); (Z.Q.)
| |
Collapse
|
3
|
De Giorgio G, Matera B, Vurro D, Manfredi E, Galstyan V, Tarabella G, Ghezzi B, D'Angelo P. Silk Fibroin Materials: Biomedical Applications and Perspectives. Bioengineering (Basel) 2024; 11:167. [PMID: 38391652 PMCID: PMC10886036 DOI: 10.3390/bioengineering11020167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/13/2024] [Accepted: 02/05/2024] [Indexed: 02/24/2024] Open
Abstract
The golden rule in tissue engineering is the creation of a synthetic device that simulates the native tissue, thus leading to the proper restoration of its anatomical and functional integrity, avoiding the limitations related to approaches based on autografts and allografts. The emergence of synthetic biocompatible materials has led to the production of innovative scaffolds that, if combined with cells and/or bioactive molecules, can improve tissue regeneration. In the last decade, silk fibroin (SF) has gained attention as a promising biomaterial in regenerative medicine due to its enhanced bio/cytocompatibility, chemical stability, and mechanical properties. Moreover, the possibility to produce advanced medical tools such as films, fibers, hydrogels, 3D porous scaffolds, non-woven scaffolds, particles or composite materials from a raw aqueous solution emphasizes the versatility of SF. Such devices are capable of meeting the most diverse tissue needs; hence, they represent an innovative clinical solution for the treatment of bone/cartilage, the cardiovascular system, neural, skin, and pancreatic tissue regeneration, as well as for many other biomedical applications. The present narrative review encompasses topics such as (i) the most interesting features of SF-based biomaterials, bare SF's biological nature and structural features, and comprehending the related chemo-physical properties and techniques used to produce the desired formulations of SF; (ii) the different applications of SF-based biomaterials and their related composite structures, discussing their biocompatibility and effectiveness in the medical field. Particularly, applications in regenerative medicine are also analyzed herein to highlight the different therapeutic strategies applied to various body sectors.
Collapse
Affiliation(s)
- Giuseppe De Giorgio
- IMEM-CNR, Institute of Materials for Electronics and Magnetism-National Research Council, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| | - Biagio Matera
- Center of Dental Medicine, Department of Medicine and Surgery, University of Parma, Via Gramsci 14/A, 43126 Parma, Italy
| | - Davide Vurro
- IMEM-CNR, Institute of Materials for Electronics and Magnetism-National Research Council, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| | - Edoardo Manfredi
- Center of Dental Medicine, Department of Medicine and Surgery, University of Parma, Via Gramsci 14/A, 43126 Parma, Italy
| | - Vardan Galstyan
- IMEM-CNR, Institute of Materials for Electronics and Magnetism-National Research Council, Parco Area delle Scienze 37/A, 43124 Parma, Italy
- Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Via Vivarelli 10, 41125 Modena, Italy
| | - Giuseppe Tarabella
- IMEM-CNR, Institute of Materials for Electronics and Magnetism-National Research Council, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| | - Benedetta Ghezzi
- IMEM-CNR, Institute of Materials for Electronics and Magnetism-National Research Council, Parco Area delle Scienze 37/A, 43124 Parma, Italy
- Center of Dental Medicine, Department of Medicine and Surgery, University of Parma, Via Gramsci 14/A, 43126 Parma, Italy
| | - Pasquale D'Angelo
- IMEM-CNR, Institute of Materials for Electronics and Magnetism-National Research Council, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| |
Collapse
|
4
|
Tolmachev DA, Malkamäki M, Linder MB, Sammalkorpi M. Spidroins under the Influence of Alcohol: Effect of Ethanol on Secondary Structure and Molecular Level Solvation of Silk-Like Proteins. Biomacromolecules 2023; 24:5638-5653. [PMID: 38019577 PMCID: PMC10716855 DOI: 10.1021/acs.biomac.3c00637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 11/08/2023] [Accepted: 11/08/2023] [Indexed: 11/30/2023]
Abstract
Future sustainable materials based on designer biomolecules require control of the solution assembly, but also interfacial interactions. Alcohol treatments of protein materials are an accessible means to this, making understanding of the process at the molecular level of seminal importance. We focus here on the influence of ethanol on spidroins, the main proteins of silk. By large-scale atomistically detailed molecular dynamics (MD) simulations and interconnected experiments, we characterize the protein aggregation, secondary structure changes, molecular level origins of them, and solvation environment changes for the proteins, as induced by ethanol as a solvation additive. The MD and circular dichoroism (CD) findings jointly show that ethanol promotes ordered structure in the protein molecules, leading to an increase of helix content and turns but also increased aggregation, as revealed by dynamic light scattering (DLS) and light microscopy. The structural changes correlate at the molecular level with increased intramolecular hydrogen bonding. The simulations reveal that polar amino acids, such as glutamine and serine, are most influenced by ethanol, whereas glycine residues are most prone to be involved in the ethanol-induced secondary structure changes. Furthermore, ethanol engages in interactions with the hydrophobic alanine-rich regions of the spidroin, significantly decreasing the hydrophobic interactions of the protein with itself and its surroundings. The protein solutes also change the microstructure of water/ethanol mixtures, essentially decreasing the level of larger local clustering. Overall, the work presents a systematic characterization of ethanol effects on a widely used, common protein type, spidroins, and generalizes the findings to other intrinsically disordered proteins by pinpointing the general features of the response. The results can aid in designing effective alcohol treatments for proteins, but also enable design and tuning of protein material properties by a relatively controllable solvation handle, the addition of ethanol.
Collapse
Affiliation(s)
- Dmitry A. Tolmachev
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
- Academy
of Finland Center of Excellence in Life-Inspired Hybrid Materials
(LIBER), Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Maaria Malkamäki
- Department
of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
- Academy
of Finland Center of Excellence in Life-Inspired Hybrid Materials
(LIBER), Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Markus B. Linder
- Department
of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
- Academy
of Finland Center of Excellence in Life-Inspired Hybrid Materials
(LIBER), Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Maria Sammalkorpi
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
- Department
of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
- Academy
of Finland Center of Excellence in Life-Inspired Hybrid Materials
(LIBER), Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
| |
Collapse
|
5
|
Zhang M, Wang HY, Zhang YQ. Unidirectional Nanopore Dehydration Induces a Highly Stretchable and Mechanically Robust Silk Fibroin Membrane Dominated by Type II β-Turns. ACS Biomater Sci Eng 2023; 9:2741-2754. [PMID: 37027820 DOI: 10.1021/acsbiomaterials.2c00729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
Abstract
Aqueous silk fibroin solution is dehydrated by evaporation into a water-soluble cast film (SFME) with poor mechanical properties but becomes by unidirectional nanopore dehydration (UND) into silk fibroin membrane (SFMU) with water-stable and good mechanical robustness. The thickness and tensile force of the SFMU are almost twice those of the MeOH-annealed SFME. The UND-based SFMU has a tensile strength of 15.82 MPa, an elongation of 665.23%, and a type II β-turn (Silk I) that accounts for 30.75% of the crystal structure. Mouse L-929 cells adhere, grow, and proliferate well on it. The UND temperature can be used to tune the secondary structure, mechanical properties, and biodegradability. UND induced the oriented arrangement of the silk molecules, which led to the formation of the SFMU dominated with Silk I structure. The silk metamaterial by controllable UND technology has great potential in medical biomaterials, biomimetic materials, sustained drug release, and flexible electronic substrates.
Collapse
Affiliation(s)
- Meng Zhang
- Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, P. R. China
| | - Hai-Yan Wang
- Department of Obstetrics and Gynecology, The People's Hospital of Suzhou New District, Suzhou 215163, P. R. China
| | - Yu-Qing Zhang
- Silk Biotechnology Laboratory, School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, P. R. China
| |
Collapse
|
6
|
Hiew SH, Lu Y, Han H, Gonçalves RA, Alfarano SR, Mezzenga R, Parikh AN, Mu Y, Miserez A. Modulation of Mechanical Properties of Short Bioinspired Peptide Materials by Single Amino-Acid Mutations. J Am Chem Soc 2023; 145:3382-3393. [PMID: 36730942 DOI: 10.1021/jacs.2c09853] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The occurrence of modular peptide repeats in load-bearing (structural) proteins is common in nature, with distinctive peptide sequences that often remain conserved across different phylogenetic lineages. These highly conserved peptide sequences endow specific mechanical properties to the material, such as toughness or elasticity. Here, using bioinformatic tools and phylogenetic analysis, we have identified the GX8 peptide with the sequence GLYGGYGX (where X can be any residue) in a wide range of organisms. By simple mutation of the X residue, we demonstrate that GX8 can be self-assembled into various supramolecular structures, exhibiting vastly different physicochemical and viscoelastic properties, from liquid-like coacervate microdroplets to hydrogels to stiff solid materials. A combination of spectroscopic, electron microscopy, mechanical, and molecular dynamics studies is employed to obtain insights into molecular scale interactions driving self-assembly of GX8 peptides, underscoring that π-π stacking and hydrophobic interactions are the drivers of peptide self-assembly, whereas the X residue determines the extent of hydrogen bonding that regulates the macroscopic mechanical response. This study highlights the ability of single amino-acid polymorphism to tune the supramolecular assembly and bulk material properties of GX8 peptides, enabling us to cover a broad range of potential biomedical applications such as hydrogels for tissue engineering or coacervates for drug delivery.
Collapse
Affiliation(s)
- Shu Hui Hiew
- Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Yang Lu
- Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Hao Han
- School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Rui A Gonçalves
- Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Serena Rosa Alfarano
- Department of Health Sciences and Technology, ETH Zürich, Zürich 8092, Switzerland
| | - Raffaele Mezzenga
- Department of Health Sciences and Technology, ETH Zürich, Zürich 8092, Switzerland
| | - Atul N Parikh
- Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.,Departments of Biomedical Engineering and Materials Science & Engineering, University of California, Davis, California 95616, United States
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Ali Miserez
- Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| |
Collapse
|
7
|
Phamornnak C, Han B, Spencer BF, Ashton MD, Blanford CF, Hardy JG, Blaker JJ, Cartmell SH. Instructive electroactive electrospun silk fibroin-based biomaterials for peripheral nerve tissue engineering. BIOMATERIALS ADVANCES 2022; 141:213094. [PMID: 36162344 DOI: 10.1016/j.bioadv.2022.213094] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 07/03/2022] [Accepted: 08/22/2022] [Indexed: 10/15/2022]
Abstract
Aligned sub-micron fibres are an outstanding surface for orienting and promoting neurite outgrowth; therefore, attractive features to include in peripheral nerve tissue scaffolds. A new generation of peripheral nerve tissue scaffolds is under development incorporating electroactive materials and electrical regimes as instructive cues in order to facilitate fully functional regeneration. Herein, electroactive fibres composed of silk fibroin (SF) and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) were developed as a novel peripheral nerve tissue scaffold. Mats of SF with sub-micron fibre diameters of 190 ± 50 nm were fabricated by double layer electrospinning with thicknesses of ∼100 μm (∼70-80 μm random fibres and ∼20-30 μm aligned fibres). Electrospun SF mats were modified with interpenetrating polymer networks (IPN) of PEDOT:PSS in various ratios of PSS/EDOT (α) and the polymerisation was assessed by hard X-ray photoelectron spectroscopy (HAXPES). The mechanical properties of electrospun SF and IPNs mats were characterised in the wet state tensile and the electrical properties were examined by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The cytotoxicity and biocompatibility of the optimal IPNs (α = 2.3 and 3.3) mats were ascertained via the growth and neurite extension of mouse neuroblastoma x rat glioma hybrid cells (NG108-15) for 7 days. The longest neurite outgrowth of 300 μm was observed in the parallel direction of fibre alignment on laminin-coated electrospun SF and IPN (α = 2.3) mats which is the material with the lowest electron transfer resistance (Ret, ca. 330 Ω). These electrically conductive composites with aligned sub-micron fibres exhibit promise for axon guidance and also have the potential to be combined with electrical stimulation treatment as a further step for the effective regeneration of nerves.
Collapse
|
8
|
Bucciarelli A, Motta A. Use of Bombyx mori silk fibroin in tissue engineering: From cocoons to medical devices, challenges, and future perspectives. BIOMATERIALS ADVANCES 2022; 139:212982. [PMID: 35882138 DOI: 10.1016/j.bioadv.2022.212982] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 05/26/2023]
Abstract
Silk fibroin has become a prominent material in tissue engineering (TE) over the last 20 years with almost 10,000 published works spanning in all the TE applications, from skeleton to neuronal regeneration. Fibroin is an extremely versatile biopolymer that, due to its ease of processing, has enabled the development of an entire plethora of materials whose properties and architectures can be tailored to suit target applications. Although the research and development of fibroin TE materials and devices is mature, apart from sutures, only a few medical products made of fibroin are used in the clinical routines. <40 clinical trials of Bombyx mori silk-related products have been reported by the FDA and few of them resulted in a commercialized device. In this review, after explaining the structure and properties of silk fibroin, we provide an overview of both fibroin constructs existing in the literature and fibroin devices used in clinic. Through the comparison of these two categories, we identified the burning issues faced by fibroin products during their translation to the market. Two main aspects will be considered. The first is the standardization of production processes, which leads both to the standardization of the characteristics of the issued device and the correct assessment of its failure. The second is the FDA regulations, which allow new devices to be marketed through the 510(k) clearance by demonstrating their equivalence to a commercialized medical product. The history of some fibroin medical devices will be taken as a case study. Finally, we will outline a roadmap outlining what actions we believe are needed to bring fibroin products to the market.
Collapse
Affiliation(s)
- Alessio Bucciarelli
- CNR nanotech, National Council of Research, University Campus Ecotekne, Via Monteroni, 73100 Lecce, Italy.
| | - Antonella Motta
- BIOtech research centre and European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Department of Industrial Engineering, University of Trento, Via delle Regole 101, 38123 Trento, Italy.
| |
Collapse
|
9
|
Pham DM, Dey S, Katayama A. Activation of extracellular electron network in non-electroactive bacteria by Bombyx mori silk. Int J Biol Macromol 2022; 195:1-11. [PMID: 34871655 DOI: 10.1016/j.ijbiomac.2021.11.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/18/2021] [Accepted: 11/27/2021] [Indexed: 11/05/2022]
Abstract
Extracellular electron transfer material (EETM) has increasingly attracted attentions for the enhancing effect on multiple microbial reactions. Especially, EETM is known to be essential to activate the energy network in non-electroactive bacteria. It is motivated to find out an EETM which is natural-based, environmentally friendly, and easily produced at large-scale. In this study, Bombyx mori silk is found, for the first time, to function as an EETM by using an EETM-dependent pentachlorophenol (PCP) dechlorinating anaerobic microbial culture. Subsequently, by dividing fibroin fiber into different soluble/insoluble fractions and correlating their EET functions with their structural properties based on various spectroscopic analyses, the β-sheet configuration is suggested as an essential structure supporting the EET function of silk materials. The analyses also suggested the involvement of sulfur-containing amino acids in this function. The EET function is not degraded by boiling or acid/alkaline treatments and the material can be utilized multiple times, although it is susceptible to UV irradiation. Bombyx mori silk also enhance other microbial reactions, including Fe(III)OOH reduction, CO2 reduction to acetate, and nitrogen fixation. This discovery provides a basis for developing biotechnology for environmental remediation, global warming reduction, and biofertilizer production using Bombyx mori silk and its wastes.
Collapse
Affiliation(s)
- Duyen M Pham
- Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan.
| | - Sujan Dey
- Department of Civil Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Arata Katayama
- Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan; Department of Civil Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan.
| |
Collapse
|
10
|
Diethyldithiocarbamate/silk fibroin/polyethylene oxide nanofibrous for cancer therapy: Fabrication, characterization and in vitro evaluation. Int J Biol Macromol 2021; 193:293-299. [PMID: 34656539 DOI: 10.1016/j.ijbiomac.2021.10.039] [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] [Received: 08/03/2021] [Revised: 10/06/2021] [Accepted: 10/06/2021] [Indexed: 01/07/2023]
Abstract
Cancer has become a serious disease threatening human health. To tackle this issue, developing the existing potent anticancer drugs is critical to reducing the time and cost associated with creating a new drug from scratch. Diethyldithiocarbamate (DDC) - an anticancer drug- has received considerable attention due to its selectivity and reactivity. In this study, we prepared a nanofibrous matrix from silk fibroin/polyethylene oxide loaded with diethyldithiocarbamate (DDC@SF/PEO) from an aqueous solution via an electrospinning process. Upon DDC incorporation, the nanofiber's diameter has increased from 450 nm (SF/PEO) to 1202 nm (DDC@SF/PEO) confirming the successful incorporation of DDC. Furthermore, the hydrophobicity of DDC@SF/PEO nanofibrous matrix was improved by turning SF structure from random coil (silk I) to β-sheet (silk II) through ethanol vapor treatment. Biocompatibility of DDC@SF/PEO nanofibrous matrix on human normal cells (Wi-38) showed it was safe and the apoptosis-mediated anticancer activity of DDC was enhanced. Thus, loading DDC on SF/PEO nanofibrous matrix is the key descriptor for enhanced anticancer efficacy of DDC. Considering the all-aqueous and simplistic process, the DDC@SF/PEO nanofibrous matrix could be a promising candidate for cancer treatment applications.
Collapse
|
11
|
Yu S, Xian S, Ye Z, Pramudya I, Webber MJ. Glucose-Fueled Peptide Assembly: Glucagon Delivery via Enzymatic Actuation. J Am Chem Soc 2021; 143:12578-12589. [PMID: 34280305 DOI: 10.1021/jacs.1c04570] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nature achieves remarkable function from the formation of transient, nonequilibrium materials realized through continuous energy input. The role of enzymes in catalyzing chemical transformations to drive such processes, often as part of stimuli-directed signaling, governs both material formation and lifetime. Inspired by the intricate nonequilibrium nanostructures of the living world, this work seeks to create transient materials in the presence of a consumable glucose stimulus under enzymatic control of glucose oxidase. Compared to traditional glucose-responsive materials, which typically engineer degradation to release insulin under high-glucose conditions, the transient nanofibrillar hydrogel materials here are stabilized in the presence of glucose but destabilized under conditions of limited glucose to release encapsulated glucagon. In the context of blood glucose control, glucagon offers a key antagonist to insulin in responding to hypoglycemia by signaling the release of glucose stored in tissues so as to restore normal blood glucose levels. Accordingly, these materials are evaluated in a prophylactic capacity in diabetic mice to release glucagon in response to a sudden drop in blood glucose brought on by an insulin overdose. Delivery of glucagon using glucose-fueled nanofibrillar hydrogels succeeds in limiting the onset and severity of hypoglycemia in mice. This general strategy points to a new paradigm in glucose-responsive materials, leveraging glucose as a stabilizing cue for responsive glucagon delivery in combating hypoglycemia. Moreover, compared to most fundamental reports achieving nonequilibrium and/or fueled classes of materials, the present work offers a rare functional example using a disease-relevant fuel to drive deployment of a therapeutic.
Collapse
Affiliation(s)
- Sihan Yu
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, Indiana 46556, United States
| | - Sijie Xian
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, Indiana 46556, United States
| | - Zhou Ye
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, Indiana 46556, United States
| | - Irawan Pramudya
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, Indiana 46556, United States
| | - Matthew J Webber
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, Indiana 46556, United States
| |
Collapse
|
12
|
Protein-Engineered Polymers Functionalized with Antimicrobial Peptides for the Development of Active Surfaces. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11125352] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Antibacterial resistance is a major worldwide threat due to the increasing number of infections caused by antibiotic-resistant bacteria with medical devices being a major source of these infections. This suggests the need for new antimicrobial biomaterial designs able to withstand the increasing pressure of antimicrobial resistance. Recombinant protein polymers (rPPs) are an emerging class of nature-inspired biopolymers with unique chemical, physical and biological properties. These polymers can be functionalized with antimicrobial molecules utilizing recombinant DNA technology and then produced in microbial cell factories. In this work, we report the functionalization of rPBPs based on elastin and silk-elastin with different antimicrobial peptides (AMPs). These polymers were produced in Escherichia coli, successfully purified by employing non-chromatographic processes, and used for the production of free-standing films. The antimicrobial activity of the materials was evaluated against Gram-positive and Gram-negative bacteria, and results showed that the polymers demonstrated antimicrobial activity, pointing out the potential of these biopolymers for the development of new advanced antimicrobial materials.
Collapse
|
13
|
Mann A, Lydon F, Tighe BJ, Suzuki S, Chirila TV. A study of the permeation and water-structuring behavioural properties of PEG modified hydrated silk fibroin membranes. Biomed Phys Eng Express 2021; 7. [PMID: 33930887 DOI: 10.1088/2057-1976/abfd82] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 04/30/2021] [Indexed: 12/19/2022]
Abstract
The potential of naturally occurring substances as a source of biomedical materials is well-recognised and is being increasingly exploited. Silk fibroin membranes derived fromBombyx morisilk cocoons exemplify this, for example as substrata for the growth of ocular cells with the aim of generating biomaterial-cell constructs for tissue engineering. This study investigated the transport properties of selected silk fibroin membranes under conditions that allowed equilibrium hydration of the membranes to be maintained. The behaviour of natural fibroin membranes was compared with fibroin membranes that have been chemically modified with poly(ethylene glycol). The permeation of the smaller hydrated sodium ion was higher than that of the hydrated calcium ion for all three ethanol treated membranes investigated. The PEG and HRP-modified C membrane, which had the highest water content at 59.6 ± 1.5% exhibited the highest permeation of the three membranes at 95.7 ± 2.8 × 10-8cm2s-1compared with 17.9 ± 0.9 × 10-8cm2s-1and 8.7 ± 1.7 × 10-8cm2s-1for membranes A and B respectively for the NaCl permeant. Poly(ethylene glycol) was used to increase permeability while exploiting the crosslinking capabilities of horseradish peroxidase to increase the compressive strength of the membrane. Importantly, we have established that the permeation behaviour of water-soluble permeants with hydrated radii in the sub-nanometer range is analogous to that of conventional hydrogel polymers.
Collapse
Affiliation(s)
- Aisling Mann
- Biomaterials Research Unit, Chemical Engineering and Applied Chemistry, College of Engineering and Physical Sciences, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Fiona Lydon
- Biomaterials Research Unit, Chemical Engineering and Applied Chemistry, College of Engineering and Physical Sciences, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Brian J Tighe
- Biomaterials Research Unit, Chemical Engineering and Applied Chemistry, College of Engineering and Physical Sciences, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Shuko Suzuki
- Queensland Eye Institute, South Brisbane, Queensland 4101, Australia
| | - Traian V Chirila
- Queensland Eye Institute, South Brisbane, Queensland 4101, Australia.,Science & Engineering Faculty, Queensland University of Technology, Brisbane, Queensland 4001, Australia.,Faculty of Medicine, University of Queensland, Herston, Queensland 4029, Australia.,Australian Institute for Bioengineering and Nanotechnology, University of Queensland, St Lucia, Queensland 4072, Australia.,Faculty of Science, University of Western Australia, Crawley, Western Australia 6009, Australia
| |
Collapse
|
14
|
Kwak TJ, Jung H, Allen BD, Demirel MC, Chang WJ. Dielectrophoretic separation of randomly shaped protein particles. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118280] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
15
|
Reizabal A, Costa CM, Saiz PG, Gonzalez B, Pérez-Álvarez L, Fernández de Luis R, Garcia A, Vilas-Vilela JL, Lanceros-Méndez S. Processing Strategies to Obtain Highly Porous Silk Fibroin Structures with Tailored Microstructure and Molecular Characteristics and Their Applicability in Water Remediation. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123675. [PMID: 32846265 DOI: 10.1016/j.jhazmat.2020.123675] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
The present work reports on the control of silk fibroin (SF) porous structures performance through various processing methods. The study includes the analysis of two dissolving techniques (CaCl2/H2O/EtOH ternary and LiBr/H2O binary solutions), three regeneration methods (gelation, lyophilization and gas foaming) and one post-processing (EtOH). In all the cases, followed steps lead to SF structures with porosity values above 94% and large surface areas. Also, results about samples microstructure, secondary organization, crystallinity and water behavior, reveal a direct correlation between processing and SF properties. Thanks to the achieved progress, the SF varying porous structures were evaluated for metalloids (As5+ and As3+) and heavy metals (Cr6+ and Cr3+) adsorption, observing a direct relationship between samples processing and ionic species adsorption ability. Thus, it is shown that the control of the properties of SF based porous structures through processing, represents a suitable and ecofriendly approach for the development of bio-based materials for environmental applications.
Collapse
Affiliation(s)
- A Reizabal
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain; Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco/EHU, Apdo. 644, Bilbao, Spain.
| | - C M Costa
- Centro de Física, Universidade do Minho, 4710-057, Braga, Portugal; Centro de Química, Universidade do Minho, 4710-057, Braga, Portugal
| | - P G Saiz
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
| | - B Gonzalez
- Advanced Mining Technology Center (AMTC), Universidad de Chile, Av. Tupper 2007, Santiago, 8370451, Chile
| | - L Pérez-Álvarez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain; Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco/EHU, Apdo. 644, Bilbao, Spain
| | - R Fernández de Luis
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain
| | - A Garcia
- Advanced Mining Technology Center (AMTC), Universidad de Chile, Av. Tupper 2007, Santiago, 8370451, Chile
| | - J L Vilas-Vilela
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain; Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco/EHU, Apdo. 644, Bilbao, Spain
| | - S Lanceros-Méndez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940, Leioa, Spain; Ikerbasque, Basque Foundation for Science, 48013, Bilbao, Spain
| |
Collapse
|
16
|
Rønning SB, Berg RS, Høst V, Veiseth-Kent E, Wilhelmsen CR, Haugen E, Suso HP, Barham P, Schmidt R, Pedersen ME. Processed Eggshell Membrane Powder Is a Promising Biomaterial for Use in Tissue Engineering. Int J Mol Sci 2020; 21:ijms21218130. [PMID: 33143232 PMCID: PMC7663119 DOI: 10.3390/ijms21218130] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/25/2020] [Accepted: 10/28/2020] [Indexed: 01/01/2023] Open
Abstract
The purpose of this study was to investigate the tissue regenerating and biomechanical properties of processed eggshell membrane powder (PEP) for use in 3D-scaffolds. PEP is a low-cost, natural biomaterial with beneficial bioactive properties. Most importantly, this material is available as a by-product of the chicken egg processing (breaking) industry on a large scale, and it could have potential as a low-cost ingredient for therapeutic scaffolds. Scaffolds consisting of collagen alone and collagen combined with PEP were produced and analyzed for their mechanical properties and the growth of primary fibroblasts and skeletal muscle cells. Mechanical testing revealed that a PEP/collagen-based scaffold increased the mechanical hardness of the scaffold compared with a pure collagen scaffold. Scanning electron microscopy (SEM) demonstrated an interconnected porous structure for both scaffolds, and that the PEP was evenly distributed in dense clusters within the scaffold. Fibroblast and skeletal muscle cells attached, were viable and able to proliferate for 1 and 2 weeks in both scaffolds. The cell types retained their phenotypic properties expressing phenotype markers of fibroblasts (TE7, alpha-smooth muscle actin) and skeletal muscle (CD56) visualized by immunostaining. mRNA expression of the skeletal muscle markers myoD, myogenin, and fibroblasts marker (SMA) together with extracellular matrix components supported viable phenotypes and matrix-producing cells in both types of scaffolds. In conclusion, PEP is a promising low-cost, natural biomaterial for use in combination with collagen as a scaffold for 3D-tissue engineering to improve the mechanical properties and promote cellular adhesion and growth of regenerating cells.
Collapse
Affiliation(s)
- Sissel B. Rønning
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
| | - Ragnhild S. Berg
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
| | - Vibeke Høst
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
| | - Eva Veiseth-Kent
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
| | - Christian R. Wilhelmsen
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
| | - Eirik Haugen
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
| | - Henri-Pierre Suso
- Biovotec AS, Postbox 1001 Hoff, 0218 Oslo, Norway; (H.-P.S.); (P.B.); (R.S.)
| | - Paul Barham
- Biovotec AS, Postbox 1001 Hoff, 0218 Oslo, Norway; (H.-P.S.); (P.B.); (R.S.)
| | - Ralf Schmidt
- Biovotec AS, Postbox 1001 Hoff, 0218 Oslo, Norway; (H.-P.S.); (P.B.); (R.S.)
| | - Mona E. Pedersen
- Nofima AS, Pb 210, NO-1431 Ås, Norway; (S.B.R.); (R.S.B.); (V.H.); (E.V.-K.); (C.R.W.); (E.H.)
- Correspondence: ; Tel.:+47-64970243
| |
Collapse
|
17
|
Grant AM, Krecker MC, Gupta MK, Dennis PB, Crosby MG, Tsukruk VV. Marine Structural Protein Stability Induced by Hofmeister Salt Annealing and Enzymatic Cross-Linking. ACS Biomater Sci Eng 2020; 6:5519-5526. [PMID: 33320559 DOI: 10.1021/acsbiomaterials.0c00791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Humboldt squid is one of the fiercest marine predators thanks in part to its sucker ring teeth that are biopolymer blends of a protein isoform family called suckerin with compression strength that rivals silkworm silk. Here, we focus on the popular suckerin-12 isoform to understand what makes the secondary structure of this biopolymer different in water and the potential role of diverse physical and chemical cross-linkings. By choosing a salt post-treatment, in accordance with the Hofmeister series, we achieved film stability with salt annealing that is comparable to chemical cross-links. By correlating the film morphology with the protein secondary structure changes, suckerin-12 films were shown to contract upon treatment with kosmotropic salts and exhibited increased stability in water. These changes are related to the rearrangement of suckerin-12 secondary structure from random coils and helices to β-sheets. Overall, understanding secondary structure changes caused by aqueous and ionic environments can be instructive for the tuning of the suckerin film sclerotization, its conversion to a tough biological material, and to ultimately produce the natural squid sucker ring teeth.
Collapse
Affiliation(s)
- Anise M Grant
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30305, United States
| | - Michelle C Krecker
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30305, United States
| | - Maneesh K Gupta
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Patrick B Dennis
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Marquise G Crosby
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30305, United States
| |
Collapse
|
18
|
Chen P, Xie F, McNally T. Understanding the effects of montmorillonite and sepiolite on the properties of solution‐cast chitosan and chitosan/silk peptide composite films. POLYM INT 2020. [DOI: 10.1002/pi.6103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Pei Chen
- College of Food Science South China Agricultural University Guangzhou Guangdong 510642 China
| | - Fengwei Xie
- International Institute for Nanocomposites Manufacturing (IINM), WMG University of Warwick Coventry CV4 7AL UK
- School of Chemical Engineering University of Queensland Brisbane Queensland 4072 Australia
| | - Tony McNally
- International Institute for Nanocomposites Manufacturing (IINM), WMG University of Warwick Coventry CV4 7AL UK
| |
Collapse
|
19
|
Gupta S, Alrabaiah H, Christophe M, Rahimi-Gorji M, Nadeem S, Bit A. Evaluation of silk-based bioink during pre and post 3D bioprinting: A review. J Biomed Mater Res B Appl Biomater 2020; 109:279-293. [PMID: 32865306 DOI: 10.1002/jbm.b.34699] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/15/2020] [Accepted: 07/21/2020] [Indexed: 12/25/2022]
Abstract
During past few decades, the demand for the replacement of damaged organs is increasing consistently. This is due to the advancement in tissue engineering, which opens the possibility of regeneration of damaged organs or tissues into functional parts with the help of 3D bioprinting. Bioprinting technology presents an excellent potential to develop complex structures with precise control over cell suspension and structure. A brief description of different types of 3D bioprinting techniques, including inkjet-based, laser-based, and extrusion-based bioprinting is presented here. Due to innate advantageous features like tunable biodegradability, biocompatibility, elasticity and mechanical robustness, silk has carved a niche in the realm of tissue engineering. In this review article, the focus is to highlight the possible approach of exploring silk as bioink for fabrication of bioprinted implants using 3D bioprinting. This review discusses different type of degumming, dissolution techniques for extraction of proteins from different sources of silk. Different recently reported 3D bioprinting techniques suitable for silk-based bioink are further elaborated. Postprinting characterization of resultant scaffolds are also describe here. However, there is an astounding progress in 3D bioprinting technology, still there is a need to develop further the current bioprinting technology to make it suitable for generation of heterogeneous tissue construct. The possibility of utilizing the adhesive property of sericin to consider it as bioink is elaborated.
Collapse
Affiliation(s)
- Sharda Gupta
- Biomedical Engineering Department, National Institute of Technology, Raipur, India
| | - Hussam Alrabaiah
- College of Engineering, Al Ain University, Al Ain, United Arab Emirates.,Department of Mathematics, College of Sciences, Tafila Technical University, At-Tafilah, Jordan
| | - Marquette Christophe
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Université de Lyon, Villeurbanne Cedex, France
| | | | - Sohail Nadeem
- Mathematics and its Applications in Life Sciences Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Arindam Bit
- Biomedical Engineering Department, National Institute of Technology, Raipur, India
| |
Collapse
|
20
|
Hydrothermal Effect on Mechanical Properties of Nephila pilipes Spidroin. Polymers (Basel) 2020; 12:polym12051013. [PMID: 32365504 PMCID: PMC7284706 DOI: 10.3390/polym12051013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/22/2020] [Accepted: 04/23/2020] [Indexed: 12/29/2022] Open
Abstract
The superlative mechanical properties of spider silk and its conspicuous variations have instigated significant interest over the past few years. However, current attempts to synthetically spin spider silk fibers often yield an inferior physical performance, owing to the improper molecular interactions of silk proteins. Considering this, herein, a post-treatment process to reorganize molecular structures and improve the physical strength of spider silk is reported. The major ampullate dragline silk from Nephila pilipes with a high β-sheet content and an adequate tensile strength was utilized as the study material, while that from Cyrtophora moluccensis was regarded as a reference. Our results indicated that the hydrothermal post-treatment (50-70 °C) of natural spider silk could effectively induce the alternation of secondary structures (random coil to β-sheet) and increase the overall tensile strength of the silk. Such advantageous post-treatment strategy when applied to regenerated spider silk also leads to an increment in the strength by ~2.5-3.0 folds, recapitulating ~90% of the strength of native spider silk. Overall, this study provides a facile and effective post-spinning means for enhancing the molecular structures and mechanical properties of as-spun silk threads, both natural and regenerated.
Collapse
|
21
|
Qiao X, Miller R, Schneck E, Sun K. Influence of pH on the surface and foaming properties of aqueous silk fibroin solutions. SOFT MATTER 2020; 16:3695-3704. [PMID: 32227052 DOI: 10.1039/c9sm02372k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Silk fibroin (SF) adsorbs at the air/water interface, reduces the surface tension, and forms interfacial layers suppressing bubble coalescence and stabilizing foam. Variation of pH alters the inter-molecular interactions of SF in the interfacial layers and thus interfacial network formation, dilatational visco-elasticity and foaming properties. At pH 4, around the isoelectric point, the reduced electrostatic repulsion between the SF molecules results in thicker adsorbed layers, but adsorption rate, foaming rate and foam stability are lower than at pH 3 and pH 7. At the highest pH investigated (pH 7), the small aggregate size and high protein flexibility lead to the formation of more ordered and stable viscoelastic interfacial networks, which are resistant to deformation breakage and generate homogeneous, denser and more stable foams.
Collapse
Affiliation(s)
- Xiuying Qiao
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Reinhard Miller
- Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
| | - Emanuel Schneck
- Max Planck Institute of Colloids and Interfaces, 14476 Potsdam, Germany
| | - Kang Sun
- State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.
| |
Collapse
|
22
|
Vandghanooni S, Eskandani M. Natural polypeptides-based electrically conductive biomaterials for tissue engineering. Int J Biol Macromol 2020; 147:706-733. [PMID: 31923500 DOI: 10.1016/j.ijbiomac.2019.12.249] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/28/2019] [Accepted: 12/28/2019] [Indexed: 12/11/2022]
Abstract
Fabrication of an appropriate scaffold is the key fundamental step required for a successful tissue engineering (TE). The artificial scaffold as extracellular matrix in TE has noticeable role in the fate of cells in terms of their attachment, proliferation, differentiation, orientation and movement. In addition, chemical and electrical stimulations affect various behaviors of cells such as polarity and functionality. Therefore, the fabrication approach and materials used for the preparation of scaffold should be more considered. Various synthetic and natural polymers have been used extensively for the preparation of scaffolds. The electrically conductive polymers (ECPs), moreover, have been used in combination with other polymers to apply electric fields (EF) during TE. In this context, composites of natural polypeptides and ECPs can be taken into account as context for the preparation of suitable scaffolds with superior biological and physicochemical features. In this review, we overviewed the simultaneous usage of natural polypeptides and ECPs for the fabrication of scaffolds in TE.
Collapse
Affiliation(s)
- Somayeh Vandghanooni
- Research Center for Pharmaceutical Nanotechnology, Biomedicine institute, Tabriz University of Medical Sciences, Tabriz, Iran; Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Morteza Eskandani
- Research Center for Pharmaceutical Nanotechnology, Biomedicine institute, Tabriz University of Medical Sciences, Tabriz, Iran.
| |
Collapse
|
23
|
Valarmathi N, Sumathi S. Biomimetic hydroxyapatite/silkfibre/methylcellulose composites for bone tissue engineering applications. NEW J CHEM 2020. [DOI: 10.1039/c9nj05592d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydroxyapatite (HAP)/silk fibre (SF)/methylcellulose (MC) composites were developed by an electrospinning (E-Spin) method.
Collapse
|
24
|
Jia L, Zhang J, Liu S, Chen S, Zhu J. Visible sensing of conformational transition in model silk peptides based on a gold nanoparticles indicator. RSC Adv 2019; 9:40924-40932. [PMID: 35540090 PMCID: PMC9076423 DOI: 10.1039/c9ra05842g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 11/27/2019] [Indexed: 11/21/2022] Open
Abstract
To understand protein structural transition and β-sheet formation is of importance in disparate areas such as silk protein processing and disease related β-amyloid behavior. Herein, GAGSGAGAGSGAGY (GY-14), a tetradecapeptide based on the crystallizable sequence of silk fibroin, was employed as a model peptide of the crystalline regions of silk fibroin. Due to the incorporation of tyrosine (Y), GY-14 was able to reduce Au3+ to Au NPs and further stabilize them without any external reducing or capping reagents to produce GY-14 stabilized Au NPs (GY-14@Au NPs). The in situ prepared GY-14@Au NPs were utilized as a built-in colorimetric indicator. The influences of specified physiological factors including decreasing the pH, the addition of calcium ions and isopropanol treatment on the self-assembly behavior of GY-14@Au NPs in aqueous solution have been studied. On the basis of transmission electron microscopy (TEM), dynamic light scattering (DLS), atomic force microscopy (AFM), Fourier transform infrared (FT-IR) spectroscopy and circular dichroism (CD) measurements, the color changes and the UV-Vis absorption peak shift of GY-14@Au NPs were attributed to the conformational change of the GY-14 peptide. The colorimetric readout can be seen with the naked eye, providing an efficient indicator to study the conformational changes of peptides exposed to various environmental stimuli.
Collapse
Affiliation(s)
- Lan Jia
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, College of Material Science and Engineering, Taiyuan University of TechnologyTaiyuan030024P. R. China
| | - Jiabing Zhang
- Department Pharmacy and Machinery, China Railway 12 Bureau Group Central HospitalTaiyuan030024P. R. China
| | - Sumei Liu
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, College of Material Science and Engineering, Taiyuan University of TechnologyTaiyuan030024P. R. China
| | - Song Chen
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, College of Material Science and Engineering, Taiyuan University of TechnologyTaiyuan030024P. R. China
| | - Jingxin Zhu
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, College of Material Science and Engineering, Taiyuan University of TechnologyTaiyuan030024P. R. China
| |
Collapse
|
25
|
Badillo-Sanchez D, Chelazzi D, Giorgi R, Cincinelli A, Baglioni P. Understanding the structural degradation of South American historical silk: A Focal Plane Array (FPA) FTIR and multivariate analysis. Sci Rep 2019; 9:17239. [PMID: 31754137 PMCID: PMC6872790 DOI: 10.1038/s41598-019-53763-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 11/04/2019] [Indexed: 11/17/2022] Open
Abstract
Silk artifacts constitute an invaluable heritage, and to preserve such patrimony it is necessary to correlate the degradation of silk fibroin with the presence of dyes, pollutants, manufacturing techniques, etc. Fourier Transform Infrared Spectroscopy with a Focal plane array detector (FPA FTIR) provides structural information at the micron scale. We characterized the distribution of secondary structures in silk fibers for a large set of South American historical textiles, coupling FTIR with multivariate statistical analysis to correlate the protein structure with the age of the samples and the presence of dyes. We found that the pressure applied during attenuated total reflectance (ATR) measurements might induce structural changes in the fibers, producing similar spectra for pristine and aged samples. Reflectance spectra were thus used for the rigorous characterization of secondary structures. Some correlation was highlighted between the age of the samples (spanning over five centuries) and specific changes in their secondary structure. A correlation was found between the color of the samples and structural alterations, in agreement with the chemical nature of the dyes. Overall, we demonstrated the efficacy of reflectance FPA µ-FTIR, combined with multivariate analysis, for the rigorous and non-invasive description of protein secondary structures on large sets of samples.
Collapse
Affiliation(s)
- Diego Badillo-Sanchez
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Florence, Italy.
| | - David Chelazzi
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Florence, Italy.
| | - Rodorico Giorgi
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Florence, Italy
| | - Alessandra Cincinelli
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Florence, Italy
| | - Piero Baglioni
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, Via della Lastruccia 3, 50019, Sesto Fiorentino, Florence, Italy
| |
Collapse
|
26
|
Hiew SH, Mohanram H, Ning L, Guo J, Sánchez‐Ferrer A, Shi X, Pervushin K, Mu Y, Mezzenga R, Miserez A. A Short Peptide Hydrogel with High Stiffness Induced by 3 10-Helices to β-Sheet Transition in Water. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901173. [PMID: 31728282 PMCID: PMC6839752 DOI: 10.1002/advs.201901173] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 08/23/2019] [Indexed: 05/24/2023]
Abstract
Biological gels generally require polymeric chains that produce long-lived physical entanglements. Low molecular weight colloids offer an alternative to macromolecular gels, but often require ad-hoc synthetic procedures. Here, a short biomimetic peptide composed of eight amino acid residues derived from squid sucker ring teeth proteins is demonstrated to form hydrogel in water without any cross-linking agent or chemical modification and exhibits a stiffness on par with the stiffest peptide hydrogels. Combining solution and solid-state NMR, circular dichroism, infrared spectroscopy, and X-ray scattering, the peptide is shown to form a supramolecular, semiflexible gel assembled from unusual right-handed 310-helices stabilized in solution by π-π stacking. During gelation, the 310-helices undergo conformational transition into antiparallel β-sheets with formation of new interpeptide hydrophobic interactions, and molecular dynamic simulations corroborate stabilization by cross β-sheet oligomerization. The current study broadens the range of secondary structures available to create supramolecular hydrogels, and introduces 310-helices as transient building blocks for gelation via a 310-to-β-sheet conformational transition.
Collapse
Affiliation(s)
- Shu Hui Hiew
- Center for Biomimetic Sensor ScienceSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore639798Singapore
| | - Harini Mohanram
- Center for Biomimetic Sensor ScienceSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore639798Singapore
| | - Lulu Ning
- School of Biological SciencesNanyang Technological UniversitySingapore637551Singapore
| | - Jingjing Guo
- School of Biological SciencesNanyang Technological UniversitySingapore637551Singapore
| | | | - Xiangyan Shi
- School of Biological SciencesNanyang Technological UniversitySingapore637551Singapore
| | - Konstantin Pervushin
- School of Biological SciencesNanyang Technological UniversitySingapore637551Singapore
| | - Yuguang Mu
- School of Biological SciencesNanyang Technological UniversitySingapore637551Singapore
| | - Raffaele Mezzenga
- Department of Health Sciences & TechnologyETH ZurichZurichCH‐8092Switzerland
| | - Ali Miserez
- Center for Biomimetic Sensor ScienceSchool of Materials Science and EngineeringNanyang Technological UniversitySingapore639798Singapore
- School of Biological SciencesNanyang Technological UniversitySingapore637551Singapore
| |
Collapse
|
27
|
Janani G, Kumar M, Chouhan D, Moses JC, Gangrade A, Bhattacharjee S, Mandal BB. Insight into Silk-Based Biomaterials: From Physicochemical Attributes to Recent Biomedical Applications. ACS APPLIED BIO MATERIALS 2019; 2:5460-5491. [DOI: 10.1021/acsabm.9b00576] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
28
|
Shi C, Xing Y, Patil A, Meng Z, Yu R, Lin N, Qiu W, Hu F, Liu XY. Primary and Secondary Mesoscopic Hybrid Materials of Au Nanoparticles@Silk Fibroin and Applications. ACS APPLIED MATERIALS & INTERFACES 2019; 11:30125-30136. [PMID: 31368691 DOI: 10.1021/acsami.9b07846] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, we demonstrate the principle of mesoscopic construction of silk fibroin (SF) hybrid materials, which endows the materials with new performance. In implementing this strategy, mediating molecules, wool keratin (WK) molecules, were adopted to in-line synthesize Au nanoparticles (WK@AuNPs), which further create the stable linkage of AuNPs with SF nanofibril networks via templated β-crystallization. Fourier transform infrared spectroscopy, X-ray diffraction, and atomic force microscopy demonstrate that the mesoscopic hybrid network structure of the hybrid materials is different from neat SF materials, which gives rise to various new performances, that is, long-stable fluorescence emission. As the fluorescence emission can be characteristically annealed by Cu ions, therefore be adopted as the highly selective ion probes. Moreover, as WK@AuNPs are homogeneously connected to SF nanofibril networks, the carbonization of the materials leads to secondary hybrid materials of carbon-Au, where nano-sized Au particles are well distributed in carbonized mesoscopic conductive carbon networks. Such hybrid materials of carbon-Au can be further fabricated into electrochemical (i.e., dopamine) sensors, which are demonstrated to have excellent sensing performance.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Fan Hu
- Advanced Soft Matter Group, Department of Chemical Engineering , Delft University of Technology , Vander Maasweg 9 , Delft 2629 HZ , The Netherlands
| | - Xiang Yang Liu
- Department of Physics , National University of Singapore , 2 Science Drive 3 , 117542 , Singapore
| |
Collapse
|
29
|
Ageitos JM, Pulgar A, Csaba N, Garcia-Fuentes M. Study of nanostructured fibroin/dextran matrixes for controlled protein release. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.02.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
30
|
Modulation of aggregation of silk fibroin by synergistic effect of the complex of curcumin and β-cyclodextrin. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2019; 1867:416-425. [PMID: 30677520 DOI: 10.1016/j.bbapap.2019.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/14/2018] [Accepted: 01/18/2019] [Indexed: 02/07/2023]
Abstract
Amyloid aggregation has been associated with numerous human pathological diseases. A recent study has demonstrated that silk fibroin intermittently endorses amyloidogenesis in vivo. In the current study, we explored the propensity of silk fibroin to undergo amyloid-like aggregation and its prevention using an optimized concoction of curcumin with β-cyclodextrin. Aggregation of silk fibroin resulted in the formation of fibrils with a diameter of ~3.2 nm. However, addition of the optimized concentration of curcumin and β-cyclodextrin to silk fibroin inhibited aggregation and preserved the random coil conformation even under aggregation inducing conditions, as demonstrated by CD and FTIR spectroscopy. Benzene rings of curcumin interact with the aromatic residues of fibroin via hydrophobic interactions. However, β-cyclodextrin preferentially interacts with the non-polar residues, which are the core components for nucleation dependent protein aggregation. The present study demonstrates the ability of the concoction of curcumin and β-cyclodextrin in tuning the self assembly process of fibroin. It also provides a platform to explore the assembly process of nano-fibril and hierarchical structures in vitro along with a novel insight for designing clinically relevant silk-based functional biomaterials.
Collapse
|
31
|
Li X, Zhao H. Mechanical and degradation properties of small-diameter vascular grafts in an in vitro biomimetic environment. J Biomater Appl 2019; 33:1017-1034. [DOI: 10.1177/0885328218820751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Small-diameter vascular grafts may fail after implantation due to various reasons from mechanical and biological aspects. In order to evaluate the mechanical durability of small-diameter vascular grafts after implantation, an artificial vascular biomimetic environment that can simulate body temperature, the liquid environment outside the vessel, and continuous blood flow and pulsatile pressure was constructed. This device can be used as a “pre-test” prior to animal experiments to explore the changes of mechanical and degradation properties in the long-term in vivo environment. At the same time, braided tube-reinforced silk fibroin/poly (l-lactic acid-co-ε-caprolactone) small-diameter vascular grafts were fabricated and tested under the biomimetic environment. Mechanical changes, including tensile properties, suture retention strength, compliance, and degradation behavior of the braided tube-reinforced poly (l-lactic acid-co-ε-caprolactone)/silk fibroin small-diameter vascular grafts were explored over various periods of time in the biomimetic environment. The results shown that under a period of testing in the in vitro biomimetic environment, the comprehensive mechanical properties (including tensile properties, suture retention strength, estimated-bursting pressure, and compliance) of small-diameter vascular grafts exhibited varying degrees of changes but that there was no obvious degradation behavior in the short term.
Collapse
Affiliation(s)
- Xiangshun Li
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Huijing Zhao
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| |
Collapse
|
32
|
McGill M, Holland GP, Kaplan DL. Experimental Methods for Characterizing the Secondary Structure and Thermal Properties of Silk Proteins. Macromol Rapid Commun 2019; 40:e1800390. [PMID: 30073740 PMCID: PMC6425979 DOI: 10.1002/marc.201800390] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 06/16/2018] [Indexed: 12/17/2022]
Abstract
Silk proteins are biopolymers produced by spinning organisms that have been studied extensively for applications in materials engineering, regenerative medicine, and devices due to their high tensile strength and extensibility. This remarkable combination of mechanical properties arises from their unique semi-crystalline secondary structure and block copolymer features. The secondary structure of silks is highly sensitive to processing, and can be manipulated to achieve a wide array of material profiles. Studying the secondary structure of silks is therefore critical to understanding the relationship between structure and function, the strength and stability of silk-based materials, and the natural fiber synthesis process employed by spinning organisms. However, silks present unique challenges to structural characterization due to high-molecular-weight protein chains, repetitive sequences, and heterogeneity in intra- and interchain domain sizes. Here, experimental techniques used to study the secondary structure of silks, the information attainable from these techniques, and the limitations associated with them are reviewed. Ultimately, the appropriate utilization of a suite of techniques discussed here will enable detailed characterization of silk-based materials, from studying fundamental processing-structure-function relationships to developing commercially useful quality control assessments.
Collapse
Affiliation(s)
- Meghan McGill
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Gregory P. Holland
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1030, USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| |
Collapse
|
33
|
Griffanti G, James-Bhasin M, Donelli I, Freddi G, Nazhat SN. Functionalization of silk fibroin through anionic fibroin derived polypeptides. Biomed Mater 2018; 14:015006. [DOI: 10.1088/1748-605x/aae745] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
34
|
Roohaniesfahani I, Wang J, No YJ, de Candia C, Miao X, Lu Z, Shi J, Kaplan DL, Jiang X, Zreiqat H. Modulatory effect of simultaneously released magnesium, strontium, and silicon ions on injectable silk hydrogels for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 94:976-987. [PMID: 30423786 DOI: 10.1016/j.msec.2018.10.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 08/08/2018] [Accepted: 10/13/2018] [Indexed: 01/31/2023]
Abstract
Injectable silk hydrogels are ideal carriers of therapeutic agents due to their biocompatibility and low immunogenicity. Injectable silk hydrogels for bone regeneration have been previously developed but often utilize expensive biologics. In this study, we have developed an injectable silk composite incorporated with a triphasic ceramic called MSM-10 (54 Mg2SiO4, 36 Si3Sr5 and 10 MgO (wt%)) capable of simultaneously releasing magnesium, silicon, and strontium ions into its environment. These ions have been previously reported to possess therapeutic effects for bone regeneration. MSM-10 particles were incorporated into the silk hydrogels at various weight percentages [0.1 (SMH-0.1), 0.6 (SMH-0.6), 1 (SMH-1) and 2 (SMH-2)]. The effects of the released ions on the physicochemical and biological properties of the silk hydrogel were comprehensively evaluated. Increased MSM-10 loading was found to hinder the gelation kinetics of the silk hydrogel through the reduction of beta-sheet phase formation, which in turn affected the required sonication time for gelation, compressive strength, force of injection, microstructure and in vitro degradation rate. Primary human osteoblasts seeded on SMH-0.6 demonstrated increased proliferation and early alkaline phosphatase activity, as well as enhanced osteogenic gene expression compared to pure silk hydrogel and SMH-0.1. In vivo results in subcutaneous mouse models showed both decreased fibrous capsule formation and increased number of new blood vessels around the injected SMH-0.1 and SMH-0.6 implants compared to pure silk hydrogels. The results in this study indicate that the ions released from MSM-10 is able to influence the physicochemical and biological properties of silk hydrogels, and SMH-0.6 in particular shows promising properties for bone regeneration.
Collapse
Affiliation(s)
- Iman Roohaniesfahani
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia.
| | - Jie Wang
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Young Jung No
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - Christian de Candia
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - Xinchao Miao
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Zufu Lu
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - Jeffrey Shi
- School of Chemical and Biomolecular Engineering, Faculty of Engineering and IT, University of Sydney, Sydney, Australia
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
| | - Xinquan Jiang
- Department of Prosthodontics, Oral Bioengineering and Regenerative Medicine Lab, Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
| | - Hala Zreiqat
- Biomaterials and Tissue Engineering Research Unit, School of AMME, Faculty of Engineering and IT, University of Sydney, Sydney, Australia.
| |
Collapse
|
35
|
Wang D, Steffi C, Wang Z, Kong CH, Lim PN, Shi Z, Thian ES, Wang W. Beta-cyclodextrin modified mesoporous bioactive glass nanoparticles/silk fibroin hybrid nanofibers as an implantable estradiol delivery system for the potential treatment of osteoporosis. NANOSCALE 2018; 10:18341-18353. [PMID: 30255905 DOI: 10.1039/c8nr05268a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Osteoporosis, a systemic skeletal disease prevalent in elderly women, is associated with post-menopausal estrogen deficiency. Although systemic administration of exogenous estradiol (E2) reduced fragility fractures, the treatment has adverse effects. Localized delivery technologies of E2 could be utilized to circumvent the systemic adverse effects of systemic administration. In this study, a localized E2 delivery system is developed. Mesoporous bioactive glass nanoparticles (MBGNPs) with inherent osteogenic properties are modified with β-cyclodextrin (CD-MBGNPs) to enhance their affinity for E2. To ensure mechanical stability and integrity, E2 loaded CD-MBGNPs are further electrospun with silk fibroin (SF) to produce a nanofibrous mesh (E2@CD-MBGNPs/SF). The incorporation of MBGNPs in SF enhances in vitro apatite formation and sustains the constant release of E2. Moreover, osteoblast proliferation and differentiation markers such as alkaline phosphatase activity, collagen 1 and osteocalcin expression of MC3T3-E1 are augmented in CD-MBGNPs/SF and E2@CD-MBGNPs/SF as compared to SF nanofibers. On the other hand, osteoclast DNA, tartrate resistant acid phosphatase activity and multinucleated cell formation are reduced in E2@CD-MBGNPs/SF as compared to CD-MBGNPs/SF and SF. Hence the presence of CD-MBGNPs in SF stimulates osteoblast function whereas E2 incorporation in CD-MBGNPs/SF reduces osteoclast activity. This is the first report to develop CD-MBGNPs/SF as a localized delivery system for hydrophobic molecules such as estradiol to treat osteoporosis.
Collapse
Affiliation(s)
- Dong Wang
- Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 119228, Singapore.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Kavkler K, Pucić I, Zalar P, Demšar A, Mihaljević B. Is it safe to irradiate historic silk textile against fungi? Radiat Phys Chem Oxf Engl 1993 2018. [DOI: 10.1016/j.radphyschem.2018.04.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Dubey P, Ghosh S, Banerjee S. WITHDRAWN: Synergistic Effect of Curcumin and β-cyclodextrin on Inhibition of Silk Fibroin Self Assembly. Arch Biochem Biophys 2018:S0003-9861(18)30514-9. [PMID: 30145114 DOI: 10.1016/j.abb.2018.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/12/2018] [Accepted: 08/21/2018] [Indexed: 11/21/2022]
Affiliation(s)
- Priyanka Dubey
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sourabh Ghosh
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sauradipta Banerjee
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| |
Collapse
|
38
|
Li X, Deng G, Ma L, Lu X. Interchain Overlap Affects Formation of Silk Fibroin Secondary Structures on Hydrophobic Polystyrene Surface Detected via Achiral/Chiral Sum Frequency Generation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9453-9459. [PMID: 29983068 DOI: 10.1021/acs.langmuir.8b01194] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Silk fibroin (SF) has been engineered in the biomedical applications on account of its structural robustness, biocompatibility, and biodegradability. However, in situ study is still lacking with respect to the formation of SF secondary structures at the interface. In this paper, by using methanol as an inducing agent, the formation of SF secondary structures at the polystyrene (PS)/SF solution interfaces was detected with achiral and chiral sum frequency generation (SFG) vibrational spectroscopy. SF solutions with two concentrations above and below the critical overlapping concentration ( C*) of SF (∼1.8 mg/mL) were chosen, namely, 90 and 1 mg/mL. We found that above C*, before adding methanol to the protein solution, no ordered SF secondary structures could be detected at the PS/SF solution interface; oppositely, after adding methanol to the protein solution, ordered SF secondary structure, for example, antiparallel β-sheet, could be formed at the PS/protein solution interface. Below C*, both before and after adding methanol to the SF solution, ordered SF secondary structure such as antiparallel β-sheet could be formed. Besides, the addition of methanol could induce the formation of an extended helical structure, verified by the achiral and chiral characteristic bands. Because C* represents a critical solution concentration above which the SF chains can interact with each other and below which the SF chains are isolated in the solution, this achiral/chiral SFG study emphasizes the importance of the chain-chain interaction or spatial confinement on the formation of the protein secondary structures, which provides an additional dimension for the future study of interfacial protein folding.
Collapse
Affiliation(s)
- Xu Li
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , Jiangsu Province , P. R. China
| | - Guozhe Deng
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , Jiangsu Province , P. R. China
| | - Liang Ma
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , Jiangsu Province , P. R. China
| | - Xiaolin Lu
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering , Southeast University , Nanjing 210096 , Jiangsu Province , P. R. China
| |
Collapse
|
39
|
Balu R, Reeder S, Knott R, Mata J, de Campo L, Dutta NK, Choudhury NR. Tough Photocrosslinked Silk Fibroin/Graphene Oxide Nanocomposite Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9238-9251. [PMID: 29989819 DOI: 10.1021/acs.langmuir.8b01141] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The development of protein-based hydrogels for tissue engineering applications is often limited by their mechanical properties. Herein, we present the facile fabrication of tough regenerated silk fibroin (RSF)/graphene oxide (GO) nanocomposite hydrogels by a photochemical cross-linking method. The RSF/GO composite hydrogels demonstrated soft and adhesive properties during initial stages of photocrosslinking (<2 min), which is not observed for the pristine RSF hydrogel, and rendered a tough and nonadhesive hydrogel upon complete cross-linking (10 min). The composite hydrogels exhibited superior tensile mechanical properties, increased β-sheet content, and decreased chain mobility compared to that of the pristine RSF hydrogels. The composite hydrogels demonstrated Young's modulus as high as ∼8 MPa, which is significantly higher than native cartilage (∼1.5 MPa), and tensile toughness as high as ∼2.4 MJ/m3, which is greater than that of electroactive polymer muscles and at par with RSF/GO composite membranes fabricated by layer-by-layer assembly. Small-angle scattering study reveals the hierarchical structure of photocrosslinked RSF hydrogels to comprise randomly distributed water-poor (hydrophobic) and water-rich (hydrophilic) regions at the nanoscale, whereas water pores and channels exhibiting fractal-like characteristics at the microscale. The size of hydrophobic domain (containing β-sheets) was observed to increase slightly with GO incorporation and/or alcohol post-treatment, whereas the size of the hydrophilic domain (intersheet distance containing random coils) was observed to increase significantly, which influences/affects water uptake capacity, cross-link density, and mechanical properties of hydrogels. The presented results have implications for both fundamental understanding of the structure-property relationship of RSF-based hydrogels and their technological applications.
Collapse
Affiliation(s)
- Rajkamal Balu
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | - Shaina Reeder
- School of Chemical Engineering , University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Robert Knott
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Sydney , New South Wales 2232 , Australia
| | - Jitendra Mata
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Sydney , New South Wales 2232 , Australia
| | - Liliana de Campo
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Sydney , New South Wales 2232 , Australia
| | - Naba Kumar Dutta
- School of Engineering , RMIT University , Melbourne , Victoria 3001 , Australia
| | | |
Collapse
|
40
|
Thai silk fibroin gelation process enhancing by monohydric and polyhydric alcohols. Int J Biol Macromol 2018; 118:1726-1735. [PMID: 30017976 DOI: 10.1016/j.ijbiomac.2018.07.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/04/2018] [Accepted: 07/05/2018] [Indexed: 02/06/2023]
Abstract
Silk fibroin hydrogel is an interesting natural material in various biomedical applications. However, the self-assembled gelation takes a long time. In this work, different alcohol types are used as gelation enhancers for aqueous silk fibroin solution. Monohydric alcohols having carbon chain length from C1 to C4 and polyhydric alcohols with the number of mono- to tri- hydroxyl groups were used as the enhancers which are effective for rapid gelation. The addition of monohydric alcohol distinctively reduced the gelation time, comparing to the polyhydric alcohol. The gelation process is directly dependent on the polarity of alcohol and hydrophobicity. The alcohol mediated gelation imparts strong viscoelastic property and enhanced compressive modulus of resulting hydrogels. This is due to the effective formation of self-assembled beta sheet network of the silk fibroin chains facilitates the gelation process.
Collapse
|
41
|
Raggio R, Bonani W, Callone E, Dirè S, Gambari L, Grassi F, Motta A. Silk Fibroin Porous Scaffolds Loaded with a Slow-Releasing Hydrogen Sulfide Agent (GYY4137) for Applications of Tissue Engineering. ACS Biomater Sci Eng 2018; 4:2956-2966. [DOI: 10.1021/acsbiomaterials.8b00212] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Rosasilvia Raggio
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- BIOtech Research Center and European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Via delle Regole 101, 38123 Trento, Italy
| | - Walter Bonani
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- BIOtech Research Center and European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Via delle Regole 101, 38123 Trento, Italy
| | - Emanuela Callone
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- “Klaus Muller” Magnetic Resonance Laboratory, Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Sandra Dirè
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- “Klaus Muller” Magnetic Resonance Laboratory, Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
| | - Laura Gambari
- RAMSES Laboratory, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Francesco Grassi
- RAMSES Laboratory, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Antonella Motta
- Department of Industrial Engineering, University of Trento, Via Sommarive 9, 38123 Trento, Italy
- BIOtech Research Center and European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Via delle Regole 101, 38123 Trento, Italy
| |
Collapse
|
42
|
Yi B, Zhang H, Yu Z, Yuan H, Wang X, Zhang Y. Fabrication of high performance silk fibroin fibers via stable jet electrospinning for potential use in anisotropic tissue regeneration. J Mater Chem B 2018; 6:3934-3945. [PMID: 32254322 DOI: 10.1039/c8tb00535d] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Regenerated silk fibroin (SF) from Bombyx mori silkworm cocoons is a highly regarded natural protein-biomaterial suitable for engineering a variety of biological tissues. Electrospinning offers a unique approach to fiber formation that can readily produce micro- and nano-scale fibers recapitulating the ultrastructure of a native extracellular matrix. However, SF fibers from conventional electrospinning suffer from the problem of poor mechanical properties for load-bearing relevant tissue regeneration applications. In this study, highly aligned high-strength SF fibers were fabricated by a recently emerged stable jet electrospinning (SJES) approach, with the aid of high molecular weight poly(ethylene oxide) (PEO) acting as a fiber-forming ingredient to increase control over the jetting instability during electrospinning. The results showed that 90% of the collected SF/PEO (mass ratio 88 : 12) fiber assembly via SJES oriented unidirectionally with an angle variation of <1° and displayed obvious anisotropic wettability. Mechanically, the as-electrospun highly aligned SF/PEO fibers exhibited a 22.0-fold increase in ultimate tensile strength (50.85 ± 1.13 MPa) and a 49.3-fold increase in Young's modulus (1185.99 ± 164.56 MPa) compared with the randomly oriented SF fibers. A subsequent methanol treatment further remarkably boosted the tensile strength to 73.91 ± 5.15 MPa and Young's modulus to 2426.13 ± 86.67 MPa. The mechanical performance of the SF fibers via SJES was also impressive, even when tested in the wet state. The substantial improvement in the mechanical properties of the electrospun SF fibers is attributed to the SJES-enabled higher molecular orientation and contents of the secondary structure (α-helix and β-pleated sheet), as well as the high degree of fiber alignment. Moreover, biological tests verified that these SF-based fibrous scaffolds supported the induced pluripotent stem cell derived mesenchymal stem cells to adhere, migrate and grow in a manner of orienting along the fiber axis. We speculate that these high-performance biomimicking SF fibers might give rise to improved efficacy while being utilized to architecturally regenerate anisotropic load-bearing tissues (e.g., tendon, ligament, and blood vessel).
Collapse
Affiliation(s)
- Bingcheng Yi
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.
| | | | | | | | | | | |
Collapse
|
43
|
Ribeiro VP, Silva-Correia J, Gonçalves C, Pina S, Radhouani H, Montonen T, Hyttinen J, Roy A, Oliveira AL, Reis RL, Oliveira JM. Rapidly responsive silk fibroin hydrogels as an artificial matrix for the programmed tumor cells death. PLoS One 2018; 13:e0194441. [PMID: 29617395 PMCID: PMC5884513 DOI: 10.1371/journal.pone.0194441] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 03/02/2018] [Indexed: 01/29/2023] Open
Abstract
Timely and spatially-regulated injectable hydrogels, able to suppress growing tumors in response to conformational transitions of proteins, are of great interest in cancer research and treatment. Herein, we report rapidly responsive silk fibroin (SF) hydrogels formed by a horseradish peroxidase (HRP) crosslinking reaction at physiological conditions, and demonstrate their use as an artificial biomimetic three-dimensional (3D) matrix. The proposed SF hydrogels presented a viscoelastic nature of injectable hydrogels and spontaneous conformational changes from random coil to β-sheet conformation under physiological conditions. A human neuronal glioblastoma (U251) cell line was used for screening cell encapsulation and in vitro evaluation within the SF hydrogels. The transparent random coil SF hydrogels promoted cell viability and proliferation up to 10 days of culturing, while the crystalline SF hydrogels converted into β-sheet structure induced the formation of TUNEL-positive apoptotic cells. Therefore, this work provides a powerful tool for the investigation of the microenvironment on the programed tumor cells death, by using rapidly responsive SF hydrogels as 3D in vitro tumor models.
Collapse
Affiliation(s)
- Viviana P. Ribeiro
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
- * E-mail:
| | - Joana Silva-Correia
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Cristiana Gonçalves
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Sandra Pina
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Hajer Radhouani
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
| | - Toni Montonen
- Computational Biophysics and Imaging Group, ELT Department, Tampere University of Technology, Tampere, Finland
- BioMediTech - Institute of Biosciences and Medical Technology, Tampere, Finland
| | - Jari Hyttinen
- Computational Biophysics and Imaging Group, ELT Department, Tampere University of Technology, Tampere, Finland
- BioMediTech - Institute of Biosciences and Medical Technology, Tampere, Finland
| | - Anirban Roy
- Anasys Instruments Corp - Santa Barbara, California, United States of America
| | - Ana L. Oliveira
- CBQF – Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Porto, Portugal
| | - Rui L. Reis
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
| | - Joaquim M. Oliveira
- 3B’s Research Group – Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associated Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark – Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, Portugal
| |
Collapse
|
44
|
Intrinsic antimicrobial properties of silk spun by genetically modified silkworm strains. Transgenic Res 2018; 27:87-101. [PMID: 29435708 DOI: 10.1007/s11248-018-0059-0] [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] [Received: 10/18/2017] [Accepted: 01/19/2018] [Indexed: 02/08/2023]
Abstract
The domesticated silkworm, Bombyx mori, is a fundamental insect for silk industry. Silk is obtained from cocoons, protective envelopes produced during pupation and composed of single raw silk filaments secreted by the insect silk glands. Currently, silk is used as a textile fibre and to produce new materials for technical and biomedical applications. To enhance the use of both fabrics and silk-based materials, great efforts to obtain silk with antimicrobial properties have been made. In particular, a convincing approach is represented by the enrichment of the textile fibre with antimicrobial peptides, the main effectors of the innate immunity. To this aim, silkworm-based transgenic techniques appear to be cost-effective strategies to obtain cocoons in which antimicrobial peptides are integrated among the silk proteins. Recently, cocoons transgenic for a recombinant silk protein conjugated to the silkworm Cecropin B antimicrobial peptide were obtained and showed enhanced antibacterial properties (Li et al. in Mol Biol Rep 42:19-25, https://doi.org/10.1007/s11033-014-3735-z , 2015a). In this work we used the piggyBac-mediated germline transformation to generate several transgenic B. mori lines able to overexpress Cecropin B or Moricin antimicrobial peptides at the level of the silk gland. The derived cocoons were characterised by increased antimicrobial properties and the resulting silk fibre was able to inhibit the bacterial growth of the Gram-negative Escherichia coli. Our results suggest that the generation of silkworm overexpressing unconjugated antimicrobial peptides in the silk gland might represent an additional strategy to obtain antimicrobial peptide-enriched silk, for the production of new silk-based materials.
Collapse
|
45
|
Rider PM, Brook IM, Smith PJ, Miller CA. Reactive Inkjet Printing of Regenerated Silk Fibroin Films for Use as Dental Barrier Membranes. MICROMACHINES 2018; 9:E46. [PMID: 30393322 PMCID: PMC6187326 DOI: 10.3390/mi9020046] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/19/2018] [Accepted: 01/23/2018] [Indexed: 11/25/2022]
Abstract
Current commercially available barrier membranes for oral surgery have yet to achieve a perfect design. Existing materials used are either non-resorbable and require a second surgery for their extraction, or alternatively are resorbable but suffer from poor structural integrity or degrade into acidic by-products. Silk has the potential to overcome these issues and has yet to be made into a commercially available dental barrier membrane. Reactive inkjet printing (RIJ) has recently been demonstrated to be a suitable method for assembling silk in its regenerated silk fibroin (RSF) form into different constructs. This paper will establish the properties of RSF solutions for RIJ and the suitability of RIJ for the construction of RSF barrier membranes. Printed RSF films were characterised by their crystallinity and surface properties, which were shown to be controllable via RIJ. RSF films degraded in either phosphate buffered saline or protease XIV solutions had degradation rates related to RSF crystallinity. RSF films were also printed with the inclusion of nano-hydroxyapatite (nHA). As reactive inkjet printing could control RSF crystallinity and hence its degradation rate, as well as offering the ability to incorporate bioactive nHA inclusions, reactive inkjet printing is deemed a suitable alternative method for RSF processing and the production of dental barrier membranes.
Collapse
Affiliation(s)
- Patrick M Rider
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK.
| | - Ian M Brook
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK.
| | - Patrick J Smith
- Department of Mechanical Engineering, The University of Sheffield, Sheffield S1 3JD, UK.
| | - Cheryl A Miller
- School of Clinical Dentistry, The University of Sheffield, Sheffield S10 2TA, UK.
| |
Collapse
|
46
|
Ribeiro VP, Pina S, Oliveira JM, Reis RL. Silk Fibroin-Based Hydrogels and Scaffolds for Osteochondral Repair and Regeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1058:305-325. [DOI: 10.1007/978-3-319-76711-6_14] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
47
|
Injectable silk fibroin hydrogels functionalized with microspheres as adult stem cells-carrier systems. Int J Biol Macromol 2017; 108:960-971. [PMID: 29113887 DOI: 10.1016/j.ijbiomac.2017.11.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/02/2017] [Accepted: 11/03/2017] [Indexed: 12/30/2022]
Abstract
Hydrogels are good candidate materials for cell delivery scaffolds because they can mimic the physical, chemical, electrical and biological properties of most of the native tissues. In this study, composite biosynthetic hydrogels were produced by combining the bio-functionality of silk fibroin (SF) with the structural versatility of polyethylene-glycol-diacrylated (PEGDa). The formation of a photopolymerizable PEGDa-SF hydrogel (PSFHy) was optimized for 3D-cell culture. Functionalization of the 3D-PSFHy with protein microspheres (MS) was required to increase the porosity and cell-adhesive properties of the material. Cardiac mesenchymal stem cells, which were cultured within the MS-embedding PSFHy, exhibited good viability and expression of proteins that are characteristic of the initial phases of the cardiac muscle differentiation process. Further, the addition of chondroitin sulfate into the scaffolds improved the cell viability. A cell-preconditioning of the scaffold was also performed, suggesting a potential application of these sponge-like scaffolds for analysing the effects of several extracellular microenvironments, produced by different kinds of cells, on the stem cells fate. The results presented herein highlight on the possibility to use the PSFHys functionalized with MS as stem cell-carrier systems with sponge-like properties, potential ultrasound-imaging contrast agents and controlled biochemical factor delivery.
Collapse
|
48
|
Bhattacharjee P, Kundu B, Naskar D, Kim HW, Maiti TK, Bhattacharya D, Kundu SC. Silk scaffolds in bone tissue engineering: An overview. Acta Biomater 2017; 63:1-17. [PMID: 28941652 DOI: 10.1016/j.actbio.2017.09.027] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 08/26/2017] [Accepted: 09/19/2017] [Indexed: 12/17/2022]
Abstract
Bone tissue plays multiple roles in our day-to-day functionality. The frequency of accidental bone damage and disorder is increasing worldwide. Moreover, as the world population continues to grow, the percentage of the elderly population continues to grow, which results in an increased number of bone degenerative diseases. This increased elderly population pushes the need for artificial bone implants that specifically employ biocompatible materials. A vast body of literature is available on the use of silk in bone tissue engineering. The current work presents an overview of this literature from materials and fabrication perspective. As silk is an easy-to-process biopolymer; this allows silk-based biomaterials to be molded into diverse forms and architectures, which further affects the degradability. This makes silk-based scaffolds suitable for treating a variety of bone reconstruction and regeneration objectives. Silk surfaces offer active sites that aid the mineralization and/or bonding of bioactive molecules that facilitate bone regeneration. Silk has also been blended with a variety of polymers and minerals to enhance its advantageous properties or introduce new ones. Several successful works, both in vitro and in vivo, have been reported using silk-based scaffolds to regenerate bone tissues or other parts of the skeletal system such as cartilage and ligament. A growing trend is observed toward the use of mineralized and nanofibrous scaffolds along with the development of technology that allows to control scaffold architecture, its biodegradability and the sustained releasing property of scaffolds. Further development of silk-based scaffolds for bone tissue engineering, taking them up to and beyond the stage of human trials, is hoped to be achieved in the near future through a cross-disciplinary coalition of tissue engineers, material scientists and manufacturing engineers. STATEMENT OF SIGNIFICANCE The state-of-art of silk biomaterials in bone tissue engineering, covering their wide applications as cell scaffolding matrices to micro-nano carriers for delivering bone growth factors and therapeutic molecules to diseased or damaged sites to facilitate bone regeneration, is emphasized here. The review rationalizes that the choice of silk protein as a biomaterial is not only because of its natural polymeric nature, mechanical robustness, flexibility and wide range of cell compatibility but also because of its ability to template the growth of hydroxyapatite, the chief inorganic component of bone mineral matrix, resulting in improved osteointegration. The discussion extends to the role of inorganic ions such as Si and Ca as matrix components in combination with silk to influence bone regrowth. The effect of ions or growth factor-loaded vehicle incorporation into regenerative matrix, nanotopography is also considered.
Collapse
|
49
|
Xing Y, Shi C, Zhao J, Qiu W, Lin N, Wang J, Yan XB, Yu WD, Liu XY. Mesoscopic-Functionalization of Silk Fibroin with Gold Nanoclusters Mediated by Keratin and Bioinspired Silk Synapse. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1702390. [PMID: 28863240 DOI: 10.1002/smll.201702390] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Indexed: 05/21/2023]
Abstract
Silk fibroin (SF) offers great opportunities in manufacturing biocompatible/partially biodegradable devices with environmental benignity and biomedical applications. To obtain active SF devices of next generation, this work is to demonstrate a new functionalization strategy of the mesoscopic functionalization for soft materials. Unlike the atomic functionalization of solid materials, the meso-functionalization is to incorporate meso-dopants, i.e., functional molecules or nanomaterials, quantum dots, into the mesoscopic networks of soft materials. In this work, wool keratin (WK) molecules were adopted as mediating molecules to incorporate gold nanoclusters (AuNCs), into the mesoscopic networks of SF. It follows from our analyses that the β-crystallites between WK and SF molecules establish the binding between WK@AuNCs and the SF networks. The incorporated WK@AuNCs are electron rich and serve as electronically charged nano particles to bridge the growth of Ag filaments in bio-degradable WK@AuNCs-SF memristors. The meso-functionalization can greatly enhance the performance of SF materials and endows them with new functionalities. This can be highlighted by biocompatible/partly degradable WK@AuNCs functionalized SF resistive random-access memories, having the enhanced resistive switching memory performance, and the unique synapse characteristics and the capability of synapse learning compared with neat SF devices, and of great importance in nonvolatile memory, analog circuits, and neuromorphic applications.
Collapse
Affiliation(s)
- Yao Xing
- Research Institution for Biomimetics and Soft Matter College of Physical Science and Engineering, Fujian Key Provincial Laboratory for Soft Functional Materials Research, Xiamen University, 422 Siming Nan Road, Xiamen, 361005, P. R. China
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 Renmin Bei Road, Shanghai, 201620, P. R. China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Chenyang Shi
- Research Institution for Biomimetics and Soft Matter College of Physical Science and Engineering, Fujian Key Provincial Laboratory for Soft Functional Materials Research, Xiamen University, 422 Siming Nan Road, Xiamen, 361005, P. R. China
| | - Jianhui Zhao
- College of Electron Information and Engineering, Hebei University, Baoding, 071002, P. R. China
| | - Wu Qiu
- Research Institution for Biomimetics and Soft Matter College of Physical Science and Engineering, Fujian Key Provincial Laboratory for Soft Functional Materials Research, Xiamen University, 422 Siming Nan Road, Xiamen, 361005, P. R. China
| | - Naibo Lin
- Research Institution for Biomimetics and Soft Matter College of Physical Science and Engineering, Fujian Key Provincial Laboratory for Soft Functional Materials Research, Xiamen University, 422 Siming Nan Road, Xiamen, 361005, P. R. China
| | - Jingjuan Wang
- College of Electron Information and Engineering, Hebei University, Baoding, 071002, P. R. China
| | - Xiao Bing Yan
- College of Electron Information and Engineering, Hebei University, Baoding, 071002, P. R. China
| | - Wei Dong Yu
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, 2999 Renmin Bei Road, Shanghai, 201620, P. R. China
| | - Xiang Yang Liu
- Research Institution for Biomimetics and Soft Matter College of Physical Science and Engineering, Fujian Key Provincial Laboratory for Soft Functional Materials Research, Xiamen University, 422 Siming Nan Road, Xiamen, 361005, P. R. China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| |
Collapse
|
50
|
da Silva RR, Cavicchioli M, Lima LR, Otoni CG, Barud HS, Santagneli SH, Tercjak A, Amaral AC, Carvalho RA, Ribeiro SJL. Fabrication of Biocompatible, Functional, and Transparent Hybrid Films Based on Silk Fibroin and Epoxy Silane for Biophotonics. ACS APPLIED MATERIALS & INTERFACES 2017; 9:27905-27917. [PMID: 28715169 DOI: 10.1021/acsami.7b06061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work we explored the fabrication of flexible and transparent hybrids of silk fibroin (SF) and epoxy-modified siloxane for photonic applications. It is well-known that regenerated SF solutions can form free-standing films with high transparency. Although SF has a restricted number of chemically reactive side groups, the main issues of as-cast pristine SF films regard the high solubility into aqueous media, brittleness, and low thermal stability. The design of SF films with enhanced functionality but high transparency triggers new opportunities on a broader range of applications in biophotonics. Here we present a simple, functional, yet remarkably versatile hybrid material derived from silica sol-gel process based on SF protein and (3-glycidyloxypropyl)trimethoxysilane (GPTMS), an organically modified silicon-alkoxide owning a reactive terminal epoxy group. Specifically, we investigated the effect of the addition of GPTMS into SF solutions on the processability, morphology, crystallinity, and mechanical and optical properties of the resulting hybrid films. Highly transparent (ca. 90%) and flexible free-standing hybrid films were achieved. Cell viability assays revealed that the hybrid films are noncytotoxic to rat osteoblast cells even at high GPTMS content (up to 70 wt %). The hybrid films showed enhanced thermal stability and were rich in organic (epoxy) and inorganic (silanol) functional groups according to the content of GPTMS. We also evaluated the successful preparation of high-quality optical red emissive SF hybrid films by loading YVO4:Eu3+ nanoparticles at low concentration (<5 wt %). A meaningful description of the hybrid film structure is reported from the combination of scanning electron and atomic force microscopies, vibrational spectroscopy, solid-state NMR, and X-ray diffraction analyses.
Collapse
Affiliation(s)
- Robson R da Silva
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Maurício Cavicchioli
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Laís R Lima
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Caio G Otoni
- National Nanotechnology Laboratory for Agribusiness, EMBRAPA-CNPDIA , São Carlos, São Paulo 13560-970, Brazil
| | - Hernane S Barud
- Centro Universitário de Araraquara - UNIARA , Araraquara, São Paulo 14801-320, Brazil
| | - Silvia H Santagneli
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| | - Agnieszka Tercjak
- Group "Materials + Technologies" (GMT), Department of Chemical and Environmental Engineering, Engineering College of Gipuzkoa, University of the Basque Country (UPV/EHU) , Plaza Europa 1, 20018 Donostia-San Sebastián, Spain
| | - André C Amaral
- Centro Universitário de Araraquara - UNIARA , Araraquara, São Paulo 14801-320, Brazil
| | - Renata A Carvalho
- Centro Universitário de Araraquara - UNIARA , Araraquara, São Paulo 14801-320, Brazil
| | - Sidney J L Ribeiro
- Institute of Chemistry, São Paulo State University , Araraquara, São Paulo 14801-970, Brazil
| |
Collapse
|