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Bian Y, Wu X, Zhu Z, Zhang X, Zeng R, Yang B. Terahertz spectroscopy for interpreting the formation and hierarchical structures of silk fibroin oligopeptides. Analyst 2022; 147:1915-1922. [PMID: 35364604 DOI: 10.1039/d1an02088a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Determining the configuration and conformation of peptides is crucial for interpreting their structure-property relationships. In this work, we present nondestructive terahertz time-domain spectroscopy combined with density functional theory (DFT) and potential energy distribution (PED) analysis to identify the hierarchical structures of oligopeptides. The characteristic THz spectra of silk fibroin oligopeptides have been measured. Supported by DFT and PED analysis, the intrinsic differences among the dipeptides were identified by the collective vibrational modes of "R" groups and terminal groups linked by molecular chains of amido bonds or benzene rings. For tetrapeptides and hexapeptides, a few weak resonances and intensity differences were distinguished by the vibration mode of the molecular collective network formed by the interaction of amide planes and intramolecular hydrogen bond interactions. According to the THz absorption analyses of amide planes and intramolecular interactions within the molecular chains of silk fibroin oligopeptide isomer pairs, the formation and hierarchical structures were successfully interpreted using THz spectroscopy. This investigation develops a better understanding of the peptide formation mechanism, which further provides guidance in interpreting the formation of silk.
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Affiliation(s)
- Yujing Bian
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
| | - Xiaodong Wu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
| | - Zhenqi Zhu
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
| | - Xun Zhang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
| | - Ruonan Zeng
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
| | - Bin Yang
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, 310018, Zhejiang, China.
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Shome A, Moses JC, Rather AM, Mandal BB, Manna U. Unconventional and Facile Fabrication of Chemically Reactive Silk Fibroin Sponges for Environmental Remediation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:24258-24271. [PMID: 33985331 DOI: 10.1021/acsami.1c03150] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Silk fibroin and silk microfibers, both derived from silk cocoon, have been widely used for prospective biomedical, energy, and environmental applications. However, various complex and catalyst-based approaches have been adopted for chemical modification and integration of different functionalities in silk fibroin-based materials. Here, both tailored water wettability and mechanical property have been associated with silk microfiber reinforced silk fibroin sponges (SMFRSFSs) through the strategic introduction of β-sheets and a facile and catalyst-free chemical reaction at ambient conditions. While the controlled tailoring of β-sheets in the silk fibroin skeletal framework of the sponges allowed us to modulate the compressive modulus, the 1,4-conjugate addition reaction between amine residues of silk (fiber and fibroin) and acrylate groups of a multifunctional cross-linker provided residual chemical reactivity. Further, the chemically "reactive" sponge was postmodified with the selected alkylamines to introduce a wide range of water wettability (from 36 to 161°) without affecting the mechanical property. Thereafter, the silk cocoon-derived and extremely water-repellent sponge was used for environment-friendly cleaning of oil spillages through selective absorption-based and filtration-based oil/water separation at different and severe aqueous conditions. This silk cocoon-derived mechanically tailorable and chemically reactive sponge could also be useful for various biomedical and energy-related applications.
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Affiliation(s)
- Arpita Shome
- Bio-Inspired Polymeric Materials Lab, Department of Chemistry, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
| | - Joseph Christakiran Moses
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
| | - Adil M Rather
- Bio-Inspired Polymeric Materials Lab, Department of Chemistry, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
| | - Biman B Mandal
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
| | - Uttam Manna
- Bio-Inspired Polymeric Materials Lab, Department of Chemistry, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Kamrup, Assam 781039, India
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Sun MG, Luo Y, Teng T, Guaiquil V, Zhou Q, McGinn L, Nazzal O, Walsh M, Lee J, Rosenblatt MI. Silk Film Stiffness Modulates Corneal Epithelial Cell Mechanosignaling. MACROMOL CHEM PHYS 2021; 222:2170013. [PMID: 34149247 PMCID: PMC8208642 DOI: 10.1002/macp.202170013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Silk fibroin films are excellent candidate biomaterials for corneal tissue engineering due to their optical transparency, biocompatibility, and mechanical strength. Their tunable chemical and mechanical properties open the possibility of engineering cellular microenvironments that can both mimic native corneal tissue and provide stimuli to actively promote wound regeneration. While silk film mechanical properties, such as surface topography, have demonstrated the ability to control corneal epithelial cell wound regenerating behavior, few studies have explored the stiffness tunability of these films and its cellular effects. Cells are known actively sense the stiffness of their surroundings and processes such as cell adhesion, migration, proliferation, and expression of stem markers can be strongly influenced by matrix stiffness. This study develops technical solutions that allow for both the fabrication of films with stiffnesses similar to corneal tissue and also for their characterization in an aqueous, native-like environment at a scale relevant to cellular forces. Physiological evidence demonstrates that corneal epithelial cells are mechanosensitive to films of different stiffnesses and show that cell spreading, cytoskeletal tension, and molecular mechanotransducer localization are associated with film stiffness. These results indicate that silk film stiffness can be used to regulate cell behavior for the purposes of ocular surface repair.
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Affiliation(s)
- M G Sun
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Chicago, IL 60612
- Department of Bioengineering, University of Illinois at Chicago, 851 S. Morgan St., Chicago, IL 60607
| | - Y Luo
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Chicago, IL 60612
| | - T Teng
- Department of Bioengineering, University of Illinois at Chicago, 851 S. Morgan St., Chicago, IL 60607
| | - V Guaiquil
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Chicago, IL 60612
| | - Q Zhou
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Chicago, IL 60612
| | - L McGinn
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Chicago, IL 60612
| | - O Nazzal
- Department of Pathology, University of Illinois at Chicago, 840 S. Wood St., Suite 130 CSN, Chicago, IL 60612
| | - M Walsh
- Department of Material Sciences and Engineering, University of Wisconsin - Eau Claire, 101 Roosevelt Ave., Eau Claire, WI 54701
| | - J Lee
- Department of Bioengineering, University of Illinois at Chicago, 851 S. Morgan St., Chicago, IL 60607
| | - M I Rosenblatt
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, 1855 W. Taylor St., Chicago, IL 60612
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4
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Sun MG, Luo Y, Teng T, Guaiquil V, Zhou Q, McGinn L, Nazzal O, Walsh M, Lee J, Rosenblatt MI. Silk Film Stiffness Modulates Corneal Epithelial Cell Mechanosignaling. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Michael G. Sun
- Department of Ophthalmology and Visual Sciences University of Illinois at Chicago 1855 West Taylor Street Chicago IL 60612 USA
- Department of Bioengineering University of Illinois at Chicago 851 S. Morgan St. Chicago IL 60607 USA
| | - Yuncin Luo
- Department of Ophthalmology and Visual Sciences University of Illinois at Chicago 1855 West Taylor Street Chicago IL 60612 USA
| | - Tao Teng
- Department of Bioengineering University of Illinois at Chicago 851 S. Morgan St. Chicago IL 60607 USA
| | - Victor Guaiquil
- Department of Ophthalmology and Visual Sciences University of Illinois at Chicago 1855 West Taylor Street Chicago IL 60612 USA
| | - Qiang Zhou
- Department of Ophthalmology and Visual Sciences University of Illinois at Chicago 1855 West Taylor Street Chicago IL 60612 USA
| | - Lander McGinn
- Department of Ophthalmology and Visual Sciences University of Illinois at Chicago 1855 West Taylor Street Chicago IL 60612 USA
| | - Osayd Nazzal
- Department of Pathology University of Illinois at Chicago 840 S. Wood St., Suite 130 CSN Chicago IL 60612 USA
| | - Michael Walsh
- Department of Material Sciences and Engineering University of Wisconsin – Eau Claire 101 Roosevelt Ave Eau Claire WI 54701 USA
| | - James Lee
- Department of Bioengineering University of Illinois at Chicago 851 S. Morgan St. Chicago IL 60607 USA
| | - Mark I. Rosenblatt
- Department of Ophthalmology and Visual Sciences University of Illinois at Chicago 1855 West Taylor Street Chicago IL 60612 USA
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Valentini L, Bittolo Bon S, Pugno NM. Ice-regenerated flame retardant and robust film of Bombyx mori silk fibroin and POSS nano-cages. RSC Adv 2018; 8:9063-9069. [PMID: 35541884 PMCID: PMC9078597 DOI: 10.1039/c7ra13708g] [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: 12/28/2017] [Accepted: 02/13/2018] [Indexed: 11/21/2022] Open
Abstract
In this study, we present a simple method to prepare and control the structure of regenerated hybrid silkworm silk films through icing.
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Affiliation(s)
- Luca Valentini
- Dipartimento di Ingegneria Civile e Ambientale
- Università di Perugia
- UdR INSTM
- 05100 Terni
- Italy
| | - Silvia Bittolo Bon
- Dipartimento di Ingegneria Civile e Ambientale
- Università di Perugia
- UdR INSTM
- 05100 Terni
- Italy
| | - Nicola M. Pugno
- Laboratory of Bio-Inspired and Graphene Nanomechanics
- Department of Civil
- Environmental and Mechanical Engineering
- University of Trento
- Trento
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