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Karahisar Turan S, Kılıç Süloğlu A, İde S, Türkeş T, Barlas N. In vitro and in vivo investigation of Argiope bruennichi spider silk-based novel biomaterial for medical use. Biopolymers 2024; 115:e23572. [PMID: 38491802 DOI: 10.1002/bip.23572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/18/2024]
Abstract
As a natural and biocompatible material with high strength and flexibility, spider silk is frequently used in biomedical studies. In this study, the availability of Argiope bruennichi spider silk as a surgical suture material was investigated. The effects of spider silk-based and commercial sutures, with and without Aloe vera coating, on wound healing were evaluated by a rat dorsal skin flap model, postoperatively (7th and 14th days). Biochemical, hematological, histological, immunohistochemical, small angle x-ray scattering (SAXS) analyses and mechanical tests were performed. A. bruennichi silk did not show any cytotoxic effect on the L929 cell line according to MTT and LDH assays, in vitro. The silk materials did not cause any allergic reaction, infection, or systemic effect in rats according to hematological and biochemical analyses. A. bruennichi spider silk group showed a similar healing response to commercial sutures. SAXS analysis showed that the 14th-day applications of A. bruennichi spider silk and A. vera coated commercial suture groups have comparable structural results with control group. In conclusion, A. bruennichi spider silk is biocompatible in line with the parameters examined and shows a healing response similar to the commercial sutures commonly used in the skin.
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Affiliation(s)
| | - Aysun Kılıç Süloğlu
- Department of Biology, Faculty of Science, Hacettepe University, Ankara, Turkey
| | - Semra İde
- Department of Physics Engineering, Faculty of Engineering, Hacettepe University, Ankara, Turkey
| | - Tuncay Türkeş
- Department of Biology, Faculty of Arts and Sciences, Niğde Ömer Halisdemir University, Niğde, Turkey
| | - Nurhayat Barlas
- Department of Biology, Faculty of Science, Hacettepe University, Ankara, Turkey
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Jangir H, Das M. Designing water vapor fuelled brine-silk cocoon protein bio-battery for a self-lighting kettle and water-vapor panels. Sci Rep 2022; 12:13999. [PMID: 35978100 PMCID: PMC9385712 DOI: 10.1038/s41598-022-18211-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/08/2022] [Indexed: 11/30/2022] Open
Abstract
Water vapor increases the electrical conductivity of silk cocoons, human hair, jute, and corn silk. This phenomenon is unclear. In the present study, XPS analysis of cocoons showed that water vapor reduces the surface presence of low-energy carbon species (C–C, C–H). In contrast, electron-dense, high-energy carbon species (C–N, C=C, C=O) remained unchanged, possibly enhancing surface charge hopping. While water vapor improves the conduction, the deficiency of charge carrier diminishes the effect. We increase the charge carrier by soaking the cocoon in an aqueous solution of common salt (NaCl) to amplify the current. Salt treatment followed by 2-min exposure to water vapor results in a sharp upward spike in the current (3.6 ± 1.07 mA, n = 12; mean ± SE) from the baseline (0.06 ± 0.02 mA, n = 12). After 1 h, it maintains an average value of 0.39 ± 0.12 mA; n = 12, indicating an upward shift in the baseline. Every time the cocoon charges with water vapor, the next charging cycle initiates after the cocoon dries up. Inspired by the cocoon ecology, we demonstrate an alternating 'water vapor–dry air' cycle for rapid charging and discharging of the cocoon battery. Finally, we designed a prototype of a self-lighting kettle and water–vapor panels for futuristic homes using a 'brine-silk cocoon protein bio-battery,' where moist waste heat generates electricity.
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Affiliation(s)
- Himanshi Jangir
- NanoScience Technology Center, University of Central Florida, Orlando, Fl, 32826, USA.
| | - Mainak Das
- Design Department, Indian Institute of Technology Kanpur, Kanpur, UP, 208016, India.
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Sequential entrapping of Li and S in a conductivity cage of N-doped reduced graphene oxide supercapacitor derived from silk cocoon: a hybrid Li–S-silk supercapacitor. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0641-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kumar A, Jash A, Dubey A, Bajpai A, Philip D, Bhargava K, Singh SK, Das M, Banerjee SS. Water mediated dielectric polarizability and electron charge transport properties of high resistance natural fibers. Sci Rep 2018; 8:2726. [PMID: 29426905 PMCID: PMC5807519 DOI: 10.1038/s41598-018-20313-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 12/18/2017] [Indexed: 11/09/2022] Open
Abstract
Recent studies showed that silk and human hair fibers develop thermoelectric properties at optimal water, temperature and light conditions. The nature of charge carriers and the role of water in mediating charge conduction in these fibers is an unexplored issue. By studying four different classes of natural fibers, viz., silk cocoon, human hair, jute and corn silk, we uncover their common electrical transport properties and its dependence on water concentration and temperature. All these fibers uniformly exhibit nonlinear, hysteretic current - voltage characteristics, which scale with water concentration. The optimal electrical conductivity shows thermally activated hopping transport mechanism. Scanning tunneling microscope (STM) and dielectric measurements of silk cocoon fibers showed the electronic density of states and dielectric properties of the hydrated medium enhances with water concentration. Electron paramagnetic resonance (EPR) study reveals that the charge carriers in these membranes are electronic in nature. Our results are explained through the mechanism of hopping of a Polaron, which is an electron surrounded by positive charge fluctuations created by water molecules. The mechanism unravels the peculiar role water plays in mediating electrical activity in these membranes and also opens the possibility for exploring such charge transport mechanism in other biological membranes.
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Affiliation(s)
- Ankit Kumar
- Department of Physics, Indian Institute of Technology, Kanpur, 208016, Uttar Pradesh, India
| | - Amit Jash
- Department of Physics, Indian Institute of Technology, Kanpur, 208016, Uttar Pradesh, India
| | - Amarish Dubey
- Design Program, Indian Institute of Technology, Kanpur, 208016, Uttar Pradesh, India
| | - Alok Bajpai
- Psychiatrist, Medical Centre, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India.
| | - Deepu Philip
- Design Program, Indian Institute of Technology, Kanpur, 208016, Uttar Pradesh, India.,Industrial and Management Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India
| | | | | | - Mainak Das
- Design Program, Indian Institute of Technology, Kanpur, 208016, Uttar Pradesh, India. .,Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India.
| | - S S Banerjee
- Department of Physics, Indian Institute of Technology, Kanpur, 208016, Uttar Pradesh, India.
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