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Sandau KC, Arrigali EM, Serban BA, Serban MA. Colorimetric Properties of Bombyx mori Silk Fibroin. ACS Biomater Sci Eng 2023; 9:6623-6631. [PMID: 37931249 DOI: 10.1021/acsbiomaterials.3c00794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Recent reports highlighted several novel applications for the Bombyx mori silk fibroin (SF), as edible coatings for the preservation of food freshness, smart labels, or packaging materials. This study complements these reports and additionally describes the colorimetric sensing properties of the natural protein that could be explored to enhance the practical value of such applications. Our data show that in response to pH changes, reconstituted SF is able to undergo visible color changes that correlate with the intensity of the stimuli, regardless of its physical format or physical cross-linking state. The intensity of the developed color was proportional to the extent of the protein's hydrolytic degradation. We also found that these pH-driven color changes were reversible and interchangeable, with colorless samples at neutral pH, purple in acidic environments, and yellow under basic conditions. Our mechanistic studies identified tryptophan as being responsible for these colorimetric responses, which could be further intensified by the presence of ionized tyrosine functionalities. In addition, we determined that SF's sensing properties also applied to ultraviolet light exposure. Finally, we showed that the innate sensing capabilities of activated SF can be enhanced via the covalent incorporation of additional tryptophan into the protein. Overall, our results further support the utility of SF for sensing applications.
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Affiliation(s)
- Kolton C Sandau
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, Montana 59812, United States
| | - Elizabeth M Arrigali
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, Montana 59812, United States
| | - Bogdan A Serban
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, Montana 59812, United States
| | - Monica A Serban
- Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, Montana 59812, United States
- Montana Biotechnology Center (BIOTECH), University of Montana, Missoula, Montana 59812, United States
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Chen W, Gan L, Huang J. Design, Manufacturing and Functions of Pore-Structured Materials: From Biomimetics to Artificial. Biomimetics (Basel) 2023; 8:biomimetics8020140. [PMID: 37092392 PMCID: PMC10123697 DOI: 10.3390/biomimetics8020140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/23/2023] [Accepted: 03/26/2023] [Indexed: 04/25/2023] Open
Abstract
Porous structures with light weight and high mechanical performance exist widely in the tissues of animals and plants. Biomimetic materials with those porous structures have been well-developed, and their highly specific surfaces can be further used in functional integration. However, most porous structures in those tissues can hardly be entirely duplicated, and their complex structure-performance relationship may still be not fully understood. The key challenges in promoting the applications of biomimetic porous materials are to figure out the essential factors in hierarchical porous structures and to develop matched preparation methods to control those factors precisely. Hence, this article reviews the existing methods to prepare biomimetic porous structures. Then, the well-proved effects of micropores, mesopores, and macropores on their various properties are introduced, including mechanical, electric, magnetic, thermotics, acoustic, and chemical properties. The advantages and disadvantages of hierarchical porous structures and their preparation methods are deeply evaluated. Focusing on those disadvantages and aiming to improve the performance and functions, we summarize several modification strategies and discuss the possibility of replacing biomimetic porous structures with meta-structures.
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Affiliation(s)
- Weiwei Chen
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, State Key Laboratory of Silkworm Genome Biology, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Lin Gan
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, State Key Laboratory of Silkworm Genome Biology, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Jin Huang
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, State Key Laboratory of Silkworm Genome Biology, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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Xiao WY, Liu X, Wang W, Zhang X, Wang Y, Lan J, Fan B, Shi L, Wan X, Wang S. Self-Pumping Janus Hydrogel with Aligned Channels for Accelerating Diabetic Wound Healing. Macromol Rapid Commun 2022; 44:e2200814. [PMID: 36459585 DOI: 10.1002/marc.202200814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/25/2022] [Indexed: 12/05/2022]
Abstract
Excessive exudate secreted from diabetic wounds often results in skin overhydration, severe infections, and secondary damage upon dressing changes. However, conventional wound dressings are difficult to synchronously realize the non-maceration of wound sites and rapid exudate transport due to their random porous structure. Herein, a self-pumping Janus hydrogel with aligned channels (JHA) composed of hydrophilic poly (ethylene glycol) diacrylate (PEGDA) hydrogel layer and hydrophobic polyurethane (PU)/graphene oxide (GO)/polytetrafluoroethylene (PTFE) layer is designed to rapidly export exudate and accelerate diabetic wound healing. In the design, the ice-templating process endows the hydrophilic hydrogel layer with superior liquid transport ability and mechanical strength due to the formation of aligned channel structure. The hydrophobic layer with controlled thickness functions as an effective barrier to prevent exudate from wetting the skin surface. Experiments in diabetic rat model show that JHA can significantly promote re-epithelialization and collagen deposition, shorten the inflammation phase, and accelerate wound healing. This unique JHA dressing may have great potential for real-life usage in clinical patients.
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Affiliation(s)
- Wu-Yi Xiao
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xi Liu
- Research Center for Tissue Repair and Regeneration Affiliated to the Medical Innovation Research Division and the 4th Medical Center of Chinese PLA General Hospital, Beijing, 100048, P. R. China
| | - Wenbo Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiaobin Zhang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yuzhe Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jinze Lan
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Baoshi Fan
- Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, 100191, P. R. China
| | - Lianxin Shi
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,Binzhou Institute of Technology, Binzhou, 256600, P. R. China
| | - Xizi Wan
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shutao Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Adsorption, Surface Viscoelasticity, and Foaming Properties of Silk Fibroin at the Air/Water Interface. COLLOIDS AND INTERFACES 2022. [DOI: 10.3390/colloids6030040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Like other proteins, the natural silk fibroin (SF) extracted from domesticated silkworms can adsorb at the air/water interface and stabilize foam due to its amphiphilic character and surface activity. At the interface, the adsorbed SF molecules experience structural reorganization and form water-insoluble viscoelastic films, which protect foam bubbles from coalescence and rupture. The solution conditions, such as protein concentration, pH, and additives, have significant influences on the molecular adsorption, layer thickness, interfacial mechanical strength, and, thus, on the foaming properties of SF. The understanding of the relationship between the interfacial adsorption, surface viscoelasticity, and foaming properties of SF is very important for the design, preparation, and application of SF foams in different fields.
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