Improved strength of silk fibers in Bombyx mori trimolters induced by an anti-juvenile hormone compound

Bombyx mori silk fibers with thin diameters have advantages of lightness and crease-resistance. Many studies have used anti-juvenile hormones to induce trimolters in order to generate thin silk; however, there has been comparatively little analysis of the morphology, structure and mechanical propert...

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Veröffentlicht in:Biochimica et biophysica acta. General subjects 2018-05, Vol.1862 (5), p.1148-1156
Hauptverfasser: Guo, Kaiyu, Dong, Zhaoming, Zhang, Yan, Wang, Dandan, Tang, Muya, Zhang, Xiaolu, Xia, Qingyou, Zhao, Ping
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container_title Biochimica et biophysica acta. General subjects
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creator Guo, Kaiyu
Dong, Zhaoming
Zhang, Yan
Wang, Dandan
Tang, Muya
Zhang, Xiaolu
Xia, Qingyou
Zhao, Ping
description Bombyx mori silk fibers with thin diameters have advantages of lightness and crease-resistance. Many studies have used anti-juvenile hormones to induce trimolters in order to generate thin silk; however, there has been comparatively little analysis of the morphology, structure and mechanical properties of trimolter silk. This study induced two kinds of trimolters by appling topically anti-juvenile hormones and obtained thin diameter silk. Scanning electron microscope (SEM), FTIR analysis, tensile mechanical testing, chitin staining were used to reveal that the morphology, conformation and mechanical property of the trimolter silk. Cocoon of trimolters were highly densely packed by thinner fibers and thus had small apertures. We found that the conformation of trimolter silk fibroin changed and formed more β-sheet structures. In addition, analysis of mechanical parameters yielded a higher Young's modulus and strength in trimolter silk than in the control. By chitin staining of silk gland, we postulated that the mechanical properties of trimolters' silk was enhanced greatly during to the structural changes of silk gland. We induced trimolters by anti-juvenile hormones and the resulting cocoons were more closely packed and had smaller silk fiber diameters. We found that the conformation of trimolters silk fibroin had a higher content of β-sheet structures and better mechanical properties. Our study revealed the structures and mechanical properties of trimolter silk, and provided a valuable reference to improve silk quality by influencing molting in silkworms. [Display omitted] •Thin denier silk of trimolter is important and valuable in clothing and medical textiles.•Trimolter silk has a enormously improvement in strength and Young’s modulus due to the increase of β-sheet structures.•Hormones can be used for producing high strength and thin silk directly from silkworms.
doi_str_mv 10.1016/j.bbagen.2018.02.007
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Many studies have used anti-juvenile hormones to induce trimolters in order to generate thin silk; however, there has been comparatively little analysis of the morphology, structure and mechanical properties of trimolter silk. This study induced two kinds of trimolters by appling topically anti-juvenile hormones and obtained thin diameter silk. Scanning electron microscope (SEM), FTIR analysis, tensile mechanical testing, chitin staining were used to reveal that the morphology, conformation and mechanical property of the trimolter silk. Cocoon of trimolters were highly densely packed by thinner fibers and thus had small apertures. We found that the conformation of trimolter silk fibroin changed and formed more β-sheet structures. In addition, analysis of mechanical parameters yielded a higher Young's modulus and strength in trimolter silk than in the control. By chitin staining of silk gland, we postulated that the mechanical properties of trimolters' silk was enhanced greatly during to the structural changes of silk gland. We induced trimolters by anti-juvenile hormones and the resulting cocoons were more closely packed and had smaller silk fiber diameters. We found that the conformation of trimolters silk fibroin had a higher content of β-sheet structures and better mechanical properties. Our study revealed the structures and mechanical properties of trimolter silk, and provided a valuable reference to improve silk quality by influencing molting in silkworms. 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[Display omitted] •Thin denier silk of trimolter is important and valuable in clothing and medical textiles.•Trimolter silk has a enormously improvement in strength and Young’s modulus due to the increase of β-sheet structures.•Hormones can be used for producing high strength and thin silk directly from silkworms.</description><subject>Animals</subject><subject>Anti-juvenile hormone</subject><subject>Bombyx - chemistry</subject><subject>Bombyx - metabolism</subject><subject>Elastic Modulus</subject><subject>Imidazoles - pharmacology</subject><subject>Juvenile Hormones - antagonists &amp; inhibitors</subject><subject>Juvenile Hormones - metabolism</subject><subject>Juvenile Hormones - pharmacology</subject><subject>Mechanical property</subject><subject>Silk - biosynthesis</subject><subject>Silk - chemistry</subject><subject>Silk fiber</subject><subject>Trimolter</subject><issn>0304-4165</issn><issn>1872-8006</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kE1LxDAQhoMoun78A5EcvbQmadJNL4KKXyB40XNo0umatU3WpF3cf2-Wrh4dBuYw7zvD-yB0TklOCS2vlrnW9QJczgiVOWE5IfM9NKNyzjJJSLmPZqQgPOO0FEfoOMYlSSUqcYiOWMUFY4WYocVzvwp-DQ2OQwC3GD6wb3G03SdurYYQsXX41vd68417Hywegu19N0ybZjTJqTe4dqkHmy3HNTjbAf7wofcOsPH9yo-uOUUHbd1FONvNE_T-cP9295S9vD4-3928ZIYzOWStLkpJq4YLw0tWciqomM9LSYBXom7ASCmpMZrxttCyqjmrQABrW0Z1JYguTtDldDel-hohDqq30UDX1Q78GBUjWyiiKKsk5ZPUBB9jgFatUrY6bBQlaotYLdWEWG0RK8JUQpxsF7sPo-6h-TP9Mk2C60kAKefaQlDRWHCJlA1gBtV4-_-HH37Vj0w</recordid><startdate>201805</startdate><enddate>201805</enddate><creator>Guo, Kaiyu</creator><creator>Dong, Zhaoming</creator><creator>Zhang, Yan</creator><creator>Wang, Dandan</creator><creator>Tang, Muya</creator><creator>Zhang, Xiaolu</creator><creator>Xia, Qingyou</creator><creator>Zhao, Ping</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>201805</creationdate><title>Improved strength of silk fibers in Bombyx mori trimolters induced by an anti-juvenile hormone compound</title><author>Guo, Kaiyu ; Dong, Zhaoming ; Zhang, Yan ; Wang, Dandan ; Tang, Muya ; Zhang, Xiaolu ; Xia, Qingyou ; Zhao, Ping</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c428t-fb36819d45c46264151577680e495adec8881ccb24f3b89a429e5e2ff21b950b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Animals</topic><topic>Anti-juvenile hormone</topic><topic>Bombyx - chemistry</topic><topic>Bombyx - metabolism</topic><topic>Elastic Modulus</topic><topic>Imidazoles - pharmacology</topic><topic>Juvenile Hormones - antagonists &amp; inhibitors</topic><topic>Juvenile Hormones - metabolism</topic><topic>Juvenile Hormones - pharmacology</topic><topic>Mechanical property</topic><topic>Silk - biosynthesis</topic><topic>Silk - chemistry</topic><topic>Silk fiber</topic><topic>Trimolter</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Guo, Kaiyu</creatorcontrib><creatorcontrib>Dong, Zhaoming</creatorcontrib><creatorcontrib>Zhang, Yan</creatorcontrib><creatorcontrib>Wang, Dandan</creatorcontrib><creatorcontrib>Tang, Muya</creatorcontrib><creatorcontrib>Zhang, Xiaolu</creatorcontrib><creatorcontrib>Xia, Qingyou</creatorcontrib><creatorcontrib>Zhao, Ping</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Biochimica et biophysica acta. 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[Display omitted] •Thin denier silk of trimolter is important and valuable in clothing and medical textiles.•Trimolter silk has a enormously improvement in strength and Young’s modulus due to the increase of β-sheet structures.•Hormones can be used for producing high strength and thin silk directly from silkworms.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>29452235</pmid><doi>10.1016/j.bbagen.2018.02.007</doi><tpages>9</tpages></addata></record>
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subjects Animals
Anti-juvenile hormone
Bombyx - chemistry
Bombyx - metabolism
Elastic Modulus
Imidazoles - pharmacology
Juvenile Hormones - antagonists & inhibitors
Juvenile Hormones - metabolism
Juvenile Hormones - pharmacology
Mechanical property
Silk - biosynthesis
Silk - chemistry
Silk fiber
Trimolter
title Improved strength of silk fibers in Bombyx mori trimolters induced by an anti-juvenile hormone compound
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