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Xu Z, Ma Y, Dai H, Tan S, Han B. Advancements and Applications in the Composites of Silk Fibroin and Graphene-Based Materials. Polymers (Basel) 2022; 14:polym14153110. [PMID: 35956625 PMCID: PMC9370577 DOI: 10.3390/polym14153110] [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: 06/21/2022] [Revised: 07/18/2022] [Accepted: 07/23/2022] [Indexed: 11/16/2022] Open
Abstract
Silk fibroin and three kinds of graphene-based materials (graphene, graphene oxide, and reduced graphene oxide) have been widely investigated in biomedical fields. Recently, the hybrid composites of silk fibroin and graphene-based materials have attracted much attention owing to their combined advantages, i.e., presenting outstanding biocompatibility, mechanical properties, and excellent electrical conductivity. However, maintaining bio-toxicity and biodegradability at a proper level remains a challenge for other applications. This report describes the first attempt to summarize the hybrid composites’ preparation methods, properties, and applications to the best of our knowledge. We strongly believe that this review will open new doors for coming researchers.
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Khosropanah MH, Vaghasloo MA, Shakibaei M, Mueller AL, Kajbafzadeh AM, Amani L, Haririan I, Azimzadeh A, Hassannejad Z, Zolbin MM. Biomedical applications of silkworm (Bombyx Mori) proteins in regenerative medicine (a narrative review). J Tissue Eng Regen Med 2021; 16:91-109. [PMID: 34808032 DOI: 10.1002/term.3267] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/12/2021] [Accepted: 10/19/2021] [Indexed: 12/19/2022]
Abstract
Silk worm (Bombyx Mori) protein, have been considered as potential materials for a variety of advanced engineering and biomedical applications for decades. Recently, silkworm silk has gained significant importance in research attention mainly because of its remarkable and exceptional mechanical properties. Silk has already been shown to have unique interactions with cells in tissues through bio-recognition units. The natural silk contains fibroin and sericin and has been used in various tissues of the human body (skin, bone, nerve, and so on). Besides, silk also still has anti-cancer, anti-tyrosinase, anti-coagulant, anti-oxidant, anti-bacterial, and anti-diabetic properties. This article is supposed to describe the diverse biomedical capabilities of B. Mori silk as the appropriate biomaterial among the assorted natural and artificial polymers that are presently accessible, and ideal for usage in regenerative medicine fields.
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Affiliation(s)
- Mohammad Hossein Khosropanah
- Department of Traditional Medicine, School of Persian Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Alizadeh Vaghasloo
- Department of Traditional Medicine, School of Persian Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Shakibaei
- Musculoskeletal Research Group and Tumor Biology, Chair of Vegetative Anatomy, Institute of Anatomy, Faculty of Medicine, Ludwig-Maximilian-University Munich, Munich, Germany
| | - Anna-Lena Mueller
- Musculoskeletal Research Group and Tumor Biology, Chair of Vegetative Anatomy, Institute of Anatomy, Faculty of Medicine, Ludwig-Maximilian-University Munich, Munich, Germany
| | - Abdol-Mohammad Kajbafzadeh
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Pediatric Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Leila Amani
- Department of Traditional Pharmacy, School of Persian Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Ismaeil Haririan
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center, Faculty of Pharmacy and Department of Pharmaceutics, Tehran University of Medical Sciences, Tehran, Iran
| | - Ashkan Azimzadeh
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Pediatric Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Hassannejad
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Pediatric Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Majidi Zolbin
- Pediatric Urology and Regenerative Medicine Research Center, Children's Medical Center, Pediatric Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
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Piaia L, Silva SS, Gomes JM, R Franco A, Fernandes EM, Lobo FCM, Rodrigues LC, Leonor IB, Fredel MC, Salmoria GV, Hotza D, Reis RL. Chitosan/ β-TCP composites scaffolds coated with silk fibroin: a bone tissue engineering approach. Biomed Mater 2021; 17. [PMID: 34785622 DOI: 10.1088/1748-605x/ac355a] [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: 03/19/2021] [Accepted: 11/01/2021] [Indexed: 11/12/2022]
Abstract
Bone regeneration and natural repair are long-standing processes that can lead to uneven new tissue growth. By introducing scaffolds that can be autografts and/or allografts, tissue engineering provides new approaches to manage the major burdens involved in this process. Polymeric scaffolds allow the incorporation of bioactive agents that improve their biological and mechanical performance, making them suitable materials for bone regeneration solutions. The present work aimed to create chitosan/beta-tricalcium phosphate-based scaffolds coated with silk fibroin and evaluate their potential for bone tissue engineering. Results showed that the obtained scaffolds have porosities up to 86%, interconnectivity up to 96%, pore sizes in the range of 60-170 μm, and a stiffness ranging from 1 to 2 MPa. Furthermore, when cultured with MC3T3 cells, the scaffolds were able to form apatite crystals after 21 d; and they were able to support cell growth and proliferation up to 14 d of culture. Besides, cellular proliferation was higher on the scaffolds coated with silk. These outcomes further demonstrate that the developed structures are suitable candidates to enhance bone tissue engineering.
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Affiliation(s)
- Lya Piaia
- Laboratory of Innovation on Additive Manufacturing and Molding (NIMMA), Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.,Interdisciplinary Laboratory for the Development of Nanostructures (LINDEN), Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil
| | - Simone S Silva
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Joana M Gomes
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Albina R Franco
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Emanuel M Fernandes
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Flávia C M Lobo
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Luísa C Rodrigues
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Isabel B Leonor
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Márcio C Fredel
- Interdisciplinary Laboratory for the Development of Nanostructures (LINDEN), Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.,Laboratory of Ceramic Materials and Composites (CERMAT), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil
| | - Gean V Salmoria
- Laboratory of Innovation on Additive Manufacturing and Molding (NIMMA), Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.,Biomechanics Engineering Laboratory, University Hospital (HU), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil
| | - Dachamir Hotza
- Interdisciplinary Laboratory for the Development of Nanostructures (LINDEN), Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.,Laboratory of Ceramic Materials and Composites (CERMAT), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil
| | - Rui L Reis
- 3B's Research Group, I3Bs-Research Institute on 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, 4805-017 Barco, Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Guimarães, Portugal
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Naskar D, Sapru S, Ghosh AK, Reis RL, Dey T, Kundu SC. Nonmulberry silk proteins: multipurpose ingredient in bio-functional assembly. Biomed Mater 2021; 16. [PMID: 34428758 DOI: 10.1088/1748-605x/ac20a0] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 08/24/2021] [Indexed: 01/27/2023]
Abstract
The emerging field of tissue engineering and regenerative medicines utilising artificial polymers is facing many problems. Despite having mechanical stability, non-toxicity and biodegradability, most of them lack cytocompatibility and biocompatibility. Natural polymers (such as collagen, hyaluronic acid, fibrin, fibroin, and others), including blends, are introduced to the field to solve some of the relevant issues. Another natural biopolymer: silkworm silk gained special attention primarily due to its specific biophysical, biochemical, and material properties, worldwide availability, and cost-effectiveness. Silk proteins, namely fibroin and sericin extracted from domesticated mulberry silkwormBombyx mori, are studied extensively in the last few decades for tissue engineering. Wild nonmulberry silkworm species, originated from India and other parts of the world, also produce silk proteins with variations in their nature and properties. Among the nonmulberry silkworm species,Antheraea mylitta(Indian Tropical Tasar),A. assamensis/A. assama(Indian Muga), andSamia ricini/Philosamia ricini(Indian Eri), along withA. pernyi(Chinese temperate Oak Tasar/Tussah) andA. yamamai(Japanese Oak Tasar) exhibit inherent tripeptide motifs of arginyl glycyl aspartic acid in their fibroin amino acid sequences, which support their candidacy as the potential biomaterials. Similarly, sericin isolated from such wild species delivers unique properties and is used as anti-apoptotic and growth-inducing factors in regenerative medicines. Other characteristics such as biodegradability, biocompatibility, and non-inflammatory nature make it suitable for tissue engineering and regenerative medicine based applications. A diverse range of matrices, including but not limited to nano-micro scale structures, nanofibres, thin films, hydrogels, and porous scaffolds, are prepared from the silk proteins (fibroins and sericins) for biomedical and tissue engineering research. This review aims to represent the progress made in medical and non-medical applications in the last couple of years and depict the present status of the investigations on Indian nonmulberry silk-based matrices as a particular reference due to its remarkable potentiality of regeneration of different types of tissues. It also discusses the future perspective in tissue engineering and regenerative medicines in the context of developing cutting-edge techniques such as 3D printing/bioprinting, microfluidics, organ-on-a-chip, and other electronics, optical and thermal property-based applications.
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Affiliation(s)
- Deboki Naskar
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.,Present address: Cambridge Institute for Medical Research, School of Clinical Medicine, University of Cambridge, Hills Road, Cambridge CB2 0XY, United Kingdom
| | - Sunaina Sapru
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.,Present address: Robert H. Smith Faculty of Agriculture, Food and Environment, The Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, Rehovot, IL, Israel
| | - Ananta K Ghosh
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Rui L Reis
- 3Bs Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-4805-017 Barco, Guimaraes, Portugal
| | - Tuli Dey
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, Maharashtra 411007, India
| | - Subhas C Kundu
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.,3Bs Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-4805-017 Barco, Guimaraes, Portugal
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Liu X, Luo H, Niu L, Feng Y, Pan P, Yang J, Li M. Cleavable poly(ethylene glycol) branched chain-modified Antheraea pernyi silk fibroin as a gene delivery carrier. Nanomedicine (Lond) 2021; 16:839-853. [PMID: 33890489 DOI: 10.2217/nnm-2020-0481] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aim: To obtain a gene carrier that can effectively deliver loaded therapeutic genes to tumor cells, avoid toxic effects on normal cells and reduce nonspecific adsorption of plasma proteins. Methods: The conjugate of poly(ethylene glycol) (PEG) and MMP2SSP (PEG-MMP2SSP) was covalently coupled to cationized Antheraea pernyi silk fibroin (CASF) through disulfide bond exchange reaction to obtain a PEG-MMP2SSP-modified CASF (CASFMP). Results: The PEG chains were effectively cleaved from the CASFMP by MMP2. CASFMP/pDNA complexes inhibited human fibrosarcoma cell proliferation, and its cytotoxicity to human normal embryonic kidney cells was significantly lower than that of poly(ethylenimine)/pDNA after coculturing with cells for 24 h. Conclusion: CASFMP is a promising compound for use in gene therapy.
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Affiliation(s)
- Xueping Liu
- National Engineering Laboratory for Modern Silk, College of Textile & Clothing Engineering, Soochow University, Industrial Park, Suzhou, 215123, Jiangsu, China
| | - Hong Luo
- National Engineering Laboratory for Modern Silk, College of Textile & Clothing Engineering, Soochow University, Industrial Park, Suzhou, 215123, Jiangsu, China
| | - Longxing Niu
- National Engineering Laboratory for Modern Silk, College of Textile & Clothing Engineering, Soochow University, Industrial Park, Suzhou, 215123, Jiangsu, China
| | - Yanfei Feng
- National Engineering Laboratory for Modern Silk, College of Textile & Clothing Engineering, Soochow University, Industrial Park, Suzhou, 215123, Jiangsu, China
| | - Peng Pan
- National Engineering Laboratory for Modern Silk, College of Textile & Clothing Engineering, Soochow University, Industrial Park, Suzhou, 215123, Jiangsu, China
| | - Jicheng Yang
- Cell & Molecular Biology Institute, College of Medicine, Soochow University, Suzhou, 215123, Jiangsu, China
| | - Mingzhong Li
- National Engineering Laboratory for Modern Silk, College of Textile & Clothing Engineering, Soochow University, Industrial Park, Suzhou, 215123, Jiangsu, China
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6
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Zhang X, Zhu D, Cheng Y, Zhang X, Guo X, Lin N, Zuo B. Preparation and Biocompatibility Characterization of Regenerated Silk Fibroin Films. J MACROMOL SCI B 2021. [DOI: 10.1080/00222348.2021.1888491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Xuan Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Dong Zhu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Yuan Cheng
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Xiaohan Zhang
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Xiaolan Guo
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Nan Lin
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
| | - Baoqi Zuo
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, China
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7
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Yang CC, Yokoi K, Yamamoto K, Jouraku A. An update of KAIKObase, the silkworm genome database. Database (Oxford) 2021; 2021:baaa099. [PMID: 33645624 PMCID: PMC7918157 DOI: 10.1093/database/baaa099] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 12/14/2022]
Abstract
KAIKObase was established in 2009 as the genome database of the domesticated silkworm Bombyx mori. It provides several gene sets and genetic maps as well as genome annotation obtained from the sequencing project of the International Silkworm Genome Consortium in 2008. KAIKObase has been used widely for silkworm and insect studies even though there are some erroneous predicted genes due to misassembly and gaps in the genome. In 2019, we released a new silkworm genome assembly, showing improvements in gap closure and covering more and longer gene models. Therefore, there is a need to include new genome and new gene models to KAIKObase. In this article, we present the updated contents of KAIKObase and the methods to generate, integrate and analyze the data sets. Database URL: https://kaikobase.dna.affrc.go.jp.
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Affiliation(s)
- Ching-chia Yang
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, 1-2 Owashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Kakeru Yokoi
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, 1-2 Owashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Kimiko Yamamoto
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, 1-2 Owashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Akiya Jouraku
- Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, 1-2 Owashi, Tsukuba, Ibaraki 305-8634, Japan
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Silk fibroin as a natural polymeric based bio-material for tissue engineering and drug delivery systems-A review. Int J Biol Macromol 2020; 163:2145-2161. [DOI: 10.1016/j.ijbiomac.2020.09.057] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 09/06/2020] [Accepted: 09/09/2020] [Indexed: 12/13/2022]
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9
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Chen Q, Zhao H, Wen M, Li J, Zhou H, Wang J, Zhou Y, Liu Y, Du L, Kang H, Zhang J, Cao R, Xu X, Zhou JJ, Ren B, Wang Y. Genome of the webworm Hyphantria cunea unveils genetic adaptations supporting its rapid invasion and spread. BMC Genomics 2020; 21:242. [PMID: 32183717 PMCID: PMC7079503 DOI: 10.1186/s12864-020-6629-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 02/26/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The fall webworm Hyphantria cunea is an invasive and polyphagous defoliator pest that feeds on nearly any type of deciduous tree worldwide. The silk web of H. cunea aids its aggregating behavior, provides thermal regulation and is regarded as one of causes for its rapid spread. In addition, both chemosensory and detoxification genes are vital for host adaptation in insects. RESULTS Here, a high-quality genome of H. cunea was obtained. Silk-web-related genes were identified from the genome, and successful silencing of the silk protein gene HcunFib-H resulted in a significant decrease in silk web shelter production. The CAFE analysis showed that some chemosensory and detoxification gene families, such as CSPs, CCEs, GSTs and UGTs, were expanded. A transcriptome analysis using the newly sequenced H. cunea genome showed that most chemosensory genes were specifically expressed in the antennae, while most detoxification genes were highly expressed during the feeding peak. Moreover, we found that many nutrient-related genes and one detoxification gene, HcunP450 (CYP306A1), were under significant positive selection, suggesting a crucial role of these genes in host adaptation in H. cunea. At the metagenomic level, several microbial communities in H. cunea gut and their metabolic pathways might be beneficial to H. cunea for nutrient metabolism and detoxification, and might also contribute to its host adaptation. CONCLUSIONS These findings explain the host and environmental adaptations of H. cunea at the genetic level and provide partial evidence for the cause of its rapid invasion and potential gene targets for innovative pest management strategies.
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Affiliation(s)
- Qi Chen
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Hanbo Zhao
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Ming Wen
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Jiaxin Li
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Haifeng Zhou
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Jiatong Wang
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Yuxin Zhou
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Yulin Liu
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Lixin Du
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Hui Kang
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Jian Zhang
- School of Life Sciences, Changchun Normal University, Changchun, Jilin, China
| | - Rui Cao
- Meihekou Forest Pest Control Station, Changchun, Jilin, China
| | - Xiaoming Xu
- Garden and Plant Protection Station of Changchun, Changchun, Jilin, China
| | - Jing-Jiang Zhou
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
- Rothamsted Research, Harpenden, AL5 2JQ, UK
| | - Bingzhong Ren
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China
| | - Yinliang Wang
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, Jilin, China.
- Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun, China.
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Lopes J, França C, Beppu M. Development and characterization of membranes derived from SF/GLY/58S hybrid xerogels for the release of inorganic ions as an osteogenic stimulus for bone regeneration. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.04.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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França CG, Nascimento VF, Hernandez-Montelongo J, Machado D, Lancellotti M, Beppu MM. Synthesis and Properties of Silk Fibroin/Konjac Glucomannan Blend Beads. Polymers (Basel) 2018; 10:polym10080923. [PMID: 30960848 PMCID: PMC6403648 DOI: 10.3390/polym10080923] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/25/2018] [Accepted: 08/07/2018] [Indexed: 02/05/2023] Open
Abstract
Silk fibroin (SF) and konjac glucomannan (KGM) are promising materials in the biomedical field due to their low toxicity, biocompatibility, biodegradability and low immune response. Beads of these natural polymers are interesting scaffolds for biomedical applications, but their fabrication is a challenge due to their low stability and the necessary adaptation of their chemical and mechanical properties to be successfully applied. In that sense, this study aimed to synthesize a blend of silk fibroin and konjac glucomannan (SF/KGM) in the form of porous beads obtained through dripping into liquid nitrogen, with a post-treatment using ethanol. Intermolecular hydrogen bonds promoted the integration of SF and KGM. Treated beads showed higher porous size, crystallinity, and stability than untreated beads. Characterization analyses by Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TGA), and X-ray diffraction (XDR) evidenced that ethanol treatment allows a conformational transition from silk I to silk II in SF and an increase in the KGM deacetylation. Those chemical changes significantly enhanced the mechanical resistance of SF/KGM beads in comparison to pure SF and KGM beads. Moreover, samples showed cytocompatibility with HaCaT and BALB/c 3T3 cells.
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Affiliation(s)
- Carla Giometti França
- Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas 13083-852, São Paulo, Brazil.
| | - Vicente Franco Nascimento
- Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas 13083-852, São Paulo, Brazil.
| | - Jacobo Hernandez-Montelongo
- Departamento de Ciencias Matemáticas y Físicas, Facultad de Ingeniería, Universidad Católica de Temuco, Temuco 4813302, Chile.
- Núcleo de Investigación en Bioproductos y Materiales Avanzados (BioMa), Facultad de Ingeniería, Universidad Católica de Temuco, Temuco 4781312, Chile.
| | - Daisy Machado
- Laboratório de Biotecnologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, São Paulo, Brazil.
| | - Marcelo Lancellotti
- Laboratório de Biotecnologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, São Paulo, Brazil.
| | - Marisa Masumi Beppu
- Faculdade de Engenharia Química, Universidade Estadual de Campinas, Campinas 13083-852, São Paulo, Brazil.
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Aykac A, Karanlik B, Sehirli AO. Protective effect of silk fibroin in burn injury in rat model. Gene 2017; 641:287-291. [PMID: 29037999 DOI: 10.1016/j.gene.2017.10.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 09/12/2017] [Accepted: 10/11/2017] [Indexed: 11/16/2022]
Abstract
Activation of pro-inflamatuar pathways play major role in formation of major complications as a result of burns. This study was planned to investigate the protective effect of Silk Fibroin in lung injury caused by burn in the experimental rat model. After rinsing the skin of rats under ether anesthesia, the exposed back region, covers 30% of the total body, was kept in the 90°C water bath for 10s. The control rats were kept in the 25°C water bath for 10s. Immediately after burning process, silk fibroin was administered orally at a dose of 600mg/kg. After 24h following burning from all groups the levels of TNF-α, IL-1β in blood samples and the MDA, GSH and the activity of MPO were determined from taken lung tissues. Moreover, the expression of Bcl-2/Bax, Caspase-3 and Caspase-9 were determined. Significant increase in TNF-α, IL-1β, Casp-3 and Casp-9 levels were observed in the Silk Fibroin-treated burn group (p<0.05) whereas for ratio of Bcl-2/Bax, a significant reduction was observed compared to control group (p<0.05). Increased levels of TNF-α, IL-1β, Caspase-3 and Caspase-9 in Silk Fibroin-treated burn groups were found to be reversed. Silk fibroin can be an effective biomaterial in diminishing burn injury in tissue and apoptosis.
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Affiliation(s)
- Asli Aykac
- Near East University, Faculty of Medicine, Department of Biophysics, Nicosia, Cyprus
| | - Buse Karanlik
- Near East University, Vocational School of Health Sciences, Nicosia, Cyprus.
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13
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Abstract
The study aimed to investigate the effects of silk fibroin in a mouse model of dry eye. The experimental dry eye mouse model was developed using more than twelve-weeks-old NOD.B10.H2b mice exposing them to 30–40% ambient humidity and injecting them with scopolamine hydrobromide for 10 days. Tear production and corneal irregularity score were measured by the instillation of phosphate buffered saline or silk fibroin. Corneal detachment and conjunctival goblet cell density were observed by hematoxylin and eosin or periodic acid Schiff staining in the cornea or conjunctiva. The expression of inflammatory markers was detected by immunohistochemistry in the lacrimal gland. The silk group tear production was increased, and corneal smoothness was improved. The corneal epithelial cells and conjunctival goblet cells were recovered in the silk groups. The expression of inflammatory factors was inhibited in the lacrimal gland of the silk group. These results show that silk fibroin improved the cornea, conjunctiva, and lacrimal gland in the mouse model of dry eye. These findings suggest that silk fibroin has anti-inflammatory effects in the experimental models of dry eye.
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Lee DH, Tripathy N, Shin JH, Song JE, Cha JG, Min KD, Park CH, Khang G. Enhanced osteogenesis of β-tricalcium phosphate reinforced silk fibroin scaffold for bone tissue biofabrication. Int J Biol Macromol 2016; 95:14-23. [PMID: 27818295 DOI: 10.1016/j.ijbiomac.2016.11.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/31/2016] [Accepted: 11/01/2016] [Indexed: 11/18/2022]
Abstract
Scaffolds, used for tissue regeneration are important to preserve their function and morphology during tissue healing. Especially, scaffolds for bone tissue engineering should have high mechanical properties to endure load of bone. Silk fibroin (SF) from Bombyx mori silk cocoon has potency as a type of biomaterials in the tissue engineering. β-tricalcium phosphate (β-TCP) as a type of bioceramics is also critical as biomaterials for bone regeneration because of its biocompatibility, osteoconductivity, and mechanical strength. The aim of this study was to fabricate three-dimensional SF/β-TCP scaffolds and access its availability for bone grafts through in vitro and in vivo test. The scaffolds were fabricated in each different ratios of SF and β-TCP (100:0, 75:25, 50:50, 25:75). The characterizations of scaffolds were conducted by FT-IR, compressive strength, porosity, and SEM. The in vitro and in vivo tests were carried out by MTT, ALP, RT-PCR, SEM, μ-CT, and histological staining. We found that the SF/β-TCP scaffolds have high mechanical strength and appropriate porosity for bone tissue engineering. The study showed that SF/β-TCP (75:25) scaffold exhibited the highest osteogenesis compared with other scaffolds. The results suggested that SF/β-TCP (75:25) scaffold can be applied as one of potential bone grafts for bone tissue engineering.
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Affiliation(s)
- Dae Hoon Lee
- Department of BIN Convergence Technology, Department of Polymer. Nano Science & Technology and Polymer Fusion Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
| | - Nirmalya Tripathy
- Department of BIN Convergence Technology, Department of Polymer. Nano Science & Technology and Polymer Fusion Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
| | - Jae Hun Shin
- Department of BIN Convergence Technology, Department of Polymer. Nano Science & Technology and Polymer Fusion Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
| | - Jeong Eun Song
- Department of BIN Convergence Technology, Department of Polymer. Nano Science & Technology and Polymer Fusion Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
| | - Jae Geun Cha
- Department of BIN Convergence Technology, Department of Polymer. Nano Science & Technology and Polymer Fusion Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
| | - Kyung Dan Min
- Research and Development Institute, CGbio Corporation, Seongnam, Korea
| | - Chan Hum Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, 1-1 Okcheon, Chuncheon, Gangwon 200-702, Republic of Korea
| | - Gilson Khang
- Department of BIN Convergence Technology, Department of Polymer. Nano Science & Technology and Polymer Fusion Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
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15
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Lee JH, Kim DK, Park HS, Jeong JY, Yeon YK, Kumar V, Bae SH, Lee JM, Moon BM, Park CH. A prospective cohort study of the silk fibroin patch in chronic tympanic membrane perforation. Laryngoscope 2016; 126:2798-2803. [PMID: 27297322 DOI: 10.1002/lary.25980] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 01/27/2016] [Accepted: 02/23/2016] [Indexed: 11/08/2022]
Abstract
OBJECTIVES/HYPOTHESIS Silk fibroin patching has been used to repair acute tympanic membrane perforations. Here, we describe the advantages and outcomes of this technique for chronic tympanic membrane perforations. STUDY DESIGN Individual cohort study. METHODS Forty patients were enrolled; half underwent perichondrium myringoplasty, and the silk fibroin patch technique was applied in the remaining patients. We compared the closure, otorrhea, and complication rates; closure time; postoperative hearing gain; and patient satisfaction between the two groups. RESULTS Demographic data (gender, site, age, duration, preoperative air-bone gap, and perforation size and location) were not significantly different between the two groups. The closure rates and times, complication rates, and postoperative hearing gains were also similar in both groups. The mean operative time, otorrhea rate, and complication rate were also significantly better in the silk fibroin patch group. The intraoperative dizziness scores were higher in the conventional perichondrium myringoplasty group. CONCLUSIONS Success rates were similar for the silk fibroin patch technique and conventional perichondrium myringoplasty; however, patching was an easier, faster procedure. Our results suggest that the silk fibroin patch technique is a suitable treatment for chronic tympanic membrane perforation. LEVEL OF EVIDENCE 2b Laryngoscope, 126:2798-2803, 2016.
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Affiliation(s)
- Jun Ho Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea.,Nano-Bio Regenerative Medical Institute, Hallym University, Gangwon, South Korea
| | - Dong-Kyu Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea.,Nano-Bio Regenerative Medical Institute, Hallym University, Gangwon, South Korea
| | - Hae Sang Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea.,Nano-Bio Regenerative Medical Institute, Hallym University, Gangwon, South Korea
| | - Ju Yeon Jeong
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea
| | - Yeung Kyu Yeon
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea
| | - Vijay Kumar
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea
| | - Sung Hee Bae
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea
| | - Jung Min Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, Gangwon, South Korea
| | - Bo Mi Moon
- Nano-Bio Regenerative Medical Institute, Hallym University, Gangwon, South Korea
| | - Chan Hum Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, Gangwon, South Korea.,Nano-Bio Regenerative Medical Institute, Hallym University, Gangwon, South Korea
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16
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Ju HW, Lee OJ, Lee JM, Moon BM, Park HJ, Park YR, Lee MC, Kim SH, Chao JR, Ki CS, Park CH. Wound healing effect of electrospun silk fibroin nanomatrix in burn-model. Int J Biol Macromol 2015; 85:29-39. [PMID: 26718866 DOI: 10.1016/j.ijbiomac.2015.12.055] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 02/01/2023]
Abstract
Silk fibroin has recently become an important biomaterial for tissue engineering application. In this study, silk fibroin nanomatrix was fabricated by electrospinning and evaluated as wound dressing material in a burn rat model. The wound size reduction, histological examination, and the quantification of transforming growth factor TGF-β1 and interleukin IL-1α, 6, and 10 were measured to evaluate the healing effects. The silk fibroin nanomatrix treatment exhibited effective performance in decreasing the wound size and epithelialization. Histological finding also revealed that the deposition of collagen in the dermis was organized by covering the wound area in the silk fibroin nanomatrix treated group. The expression level of pro-inflammatory cytokine (IL-1α) was significantly reduced in the injured skin following the silk fibroin nanomatrix treatment compared to the medical gauze (control) at 7 days after burn. Also, the expression level of TGF-β1 in the wound treated with silk fibroin nanomatrix peaked 21-days post-treatment whereas expression level of TGF-β1 was highest at day 7 in the gauze treated group. In conclusion, this data demonstrates that silk fibroin nanomatrix enhances the burn wound healing, suggesting it is a good candidate for burn wound treatment.
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Affiliation(s)
- Hyung Woo Ju
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Ok Joo Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Jung Min Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Bo Mi Moon
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Hyun Jung Park
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Ye Ri Park
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Min Chae Lee
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Soo Hyeon Kim
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea
| | - Janet Ren Chao
- School of Medicine, George Washington University, Washington, D.C. 20037, USA
| | - Chang Seok Ki
- Department of Biomedical Engineering, Purdue School of Engineering, Indiana-University Purdue-University at Indianapolis, IN 46202, USA
| | - Chan Hum Park
- Nano-Bio Regenerative Medical Institute, Hallym University, 1, Hallymdaehak-gil, Chuncheon, Gangwon-do 200-702, Republic of Korea; Department of Otorhinolaryngology-Head and Neck Surgery, Chuncheon Sacred Heart Hospital, School of Medicine, Hallym University, 77, Sakju-ro, Chuncheon, Gangwon-do 200-704, Republic of Korea.
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17
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DeSimone E, Schacht K, Jungst T, Groll J, Scheibel T. Biofabrication of 3D constructs: fabrication technologies and spider silk proteins as bioinks. PURE APPL CHEM 2015. [DOI: 10.1515/pac-2015-0106] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractDespite significant investment in tissue engineering over the past 20 years, few tissue engineered products have made it to market. One of the reasons is the poor control over the 3D arrangement of the scaffold’s components. Biofabrication is a new field of research that exploits 3D printing technologies with high spatial resolution for the simultaneous processing of cells and biomaterials into 3D constructs suitable for tissue engineering. Cell-encapsulating biomaterials used in 3D bioprinting are referred to as bioinks. This review consists of: (1) an introduction of biofabrication, (2) an introduction of 3D bioprinting, (3) the requirements of bioinks, (4) existing bioinks, and (5) a specific example of a recombinant spider silk bioink. The recombinant spider silk bioink will be used as an example because its unmodified hydrogel format fits the basic requirements of bioinks: to be printable and at the same time cytocompatible. The bioink exhibited both cytocompatible (self-assembly, high cell viability) and printable (injectable, shear-thinning, high shape fidelity) qualities. Although improvements can be made, it is clear from this system that, with the appropriate bioink, many of the existing faults in tissue-like structures produced by 3D bioprinting can be minimized.
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Affiliation(s)
- Elise DeSimone
- 1Lehrstuhl Biomaterialien, Universität Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Kristin Schacht
- 1Lehrstuhl Biomaterialien, Universität Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Tomasz Jungst
- 2Lehrstuhl für Funktionswerkstoffe der Medizin und der Zahnheilkunde, Universität Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
| | - Jürgen Groll
- 2Lehrstuhl für Funktionswerkstoffe der Medizin und der Zahnheilkunde, Universität Würzburg, Pleicherwall 2, 97070 Würzburg, Germany
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18
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Clinical outcomes of silk patch in acute tympanic membrane perforation. Clin Exp Otorhinolaryngol 2015; 8:117-22. [PMID: 26045909 PMCID: PMC4451535 DOI: 10.3342/ceo.2015.8.2.117] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/02/2014] [Accepted: 10/13/2014] [Indexed: 11/25/2022] Open
Abstract
Objectives The silk patch is a thin transparent patch that is produced from silk fibroin. In this study, we investigated the treatment effects of the silk patch in patients with traumatic tympanic membrane perforation (TTMP). Methods The closure rate, otorrhea rate, and closure time in all patients and the closure time in successful patients were compared between the paper patch and silk patch groups. Results Demographic data (gender, site, age, traumatic duration, preoperative air-bone gap, and perforation size and location) were not significantly different between the two groups. The closure rate and otorrhea rate were not significantly different between the two groups. However, the closure time was different between the two groups (closure time of all patients, P=0.031; closure time of successful patients, P=0.037). Conclusion The silk patch which has transparent, elastic, adhesive, and hyper-keratinizing properties results in a more efficient closure time than the paper patch in the treatment of TTMP patients. We therefore believe that the silk patch should be recommended for the treatment of acute tympanic membrane perforation.
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19
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Abstract
Antheraea pernyi silk fibroin has favorable biocompatibility, good bioactivity and controllable biodegradability, meeting the basic requirements of controlled drug release carriers. Enhancing the negative charge of silk fibroin could further increase the encapsulation and loading efficiency of positively charged drugs. In this study, Antheraea pernyi silk fibroin was chemically modified by methylglyoxal in aqueous solution. The electric charge properties of Antheraea pernyi silk fibroin were examined to characterize the modification, the results indicated that the isoelectric point of Antheraea pernyi silk fibroin decreased from 4.5 to 3.9, and the zeta potential reduced from-11.7 mV to-12.8 mV. Amino acid analysis and 1H-NMR spectra showed that arginine residue of Antheraea pernyi silk fibroin side chain was modified by methylglyoxal for enhancing negative charge of silk fibroin. These results suggested that methylglyoxal-modified Antheraea pernyi silk fibroin could be considered as a potential starting material in loading positively charged drugs.
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20
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Sheikh FA, Ju HW, Lee JM, Moon BM, Park HJ, Lee OJ, Kim JH, Kim DK, Park CH. 3D electrospun silk fibroin nanofibers for fabrication of artificial skin. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:681-91. [DOI: 10.1016/j.nano.2014.11.007] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/29/2014] [Accepted: 11/17/2014] [Indexed: 11/26/2022]
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21
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Suntivich R, Drachuk I, Calabrese R, Kaplan DL, Tsukruk VV. Inkjet Printing of Silk Nest Arrays for Cell Hosting. Biomacromolecules 2014; 15:1428-35. [DOI: 10.1021/bm500027c] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Rattanon Suntivich
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Irina Drachuk
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Rossella Calabrese
- Department
of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - David L. Kaplan
- Department
of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
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22
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Wang X, Liu Z, Cui F. Biomimetic Synthesis of Self‐Assembled Mineralized Collagen‐Based Composites for Bone Tissue Engineering. Biomimetics (Basel) 2013. [DOI: 10.1002/9781118810408.ch2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
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23
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Kar S, Talukdar S, Pal S, Nayak S, Paranjape P, Kundu SC. Silk gland fibroin from indian muga silkworm Antheraea assama as potential biomaterial. Tissue Eng Regen Med 2013. [DOI: 10.1007/s13770-012-0008-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Meizeraitytė M, Gruškienė R, Makuška R, Dienys G. Modified chitosan as a spacer for protein immobilization. BIOCATAL BIOTRANSFOR 2013. [DOI: 10.3109/10242422.2013.814645] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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25
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Ni Y, Jiang Y, Wen J, Shao Z, Chen X, Sun S, Yu H, Li W. Construction of a functional silk-based biomaterial complex with immortalized chondrocytes in vivo. J Biomed Mater Res A 2013; 102:1071-8. [PMID: 23625883 DOI: 10.1002/jbm.a.34763] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Accepted: 04/18/2013] [Indexed: 11/11/2022]
Abstract
To explore the feasibility of constructing a functional biomaterial complex with regenerated silk fibroin membrane and immortalized chondrocytes in vivo. Rat auricular chondrocytes (RACs) were transfected with the lentivirus vector pGC-FU-hTERT-3FLAG or pGC-FU-GFP-3FLAG, encoding the human telomerase reverse transcriptase (hTERT) or GFP gene. The effects of regenerated silk fibroin film on the adhesion, growth of immortalized chondrocytes and expression of collagen II in vitro were analyzed with immunofluorescent histochemistry. Immortalized RACs were transformed. Induction by nutrient medium promoted higher expression levels of collagen II in transformed chondrocytes. The regenerated silk fibroin film was not cytotoxic to immortalized chondrocytes and had no adverse influence on their adhesion. Collagen II expression was good in the immortalized chondrocytes in vivo. The construction of a silk-based biomaterial complex with immortalized chondrocytes may provide a feasible kind of functional biomaterial for the repair of cartilage defects in clinical applications.
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Affiliation(s)
- Yusu Ni
- Department of Otolaryngology, Eye and ENT Hospital of Shanghai Medical School, Fudan University, Shanghai, China
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26
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Lee OJ, Lee JM, Kim JH, Kim J, Kweon H, Jo YY, Park CH. Biodegradation behavior of silk fibroin membranes in repairing tympanic membrane perforations. J Biomed Mater Res A 2012; 100:2018-26. [DOI: 10.1002/jbm.a.33308] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 09/06/2011] [Accepted: 10/21/2011] [Indexed: 11/07/2022]
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Acharya C, Kumary TV, Ghosh SK, Kundu SC. Characterization of Fibroin and PEG-Blended Fibroin Matrices for In Vitro Adhesion and Proliferation of Osteoblasts. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:543-65. [DOI: 10.1163/156856209x426385] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Chitrangada Acharya
- a Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
| | - T. V. Kumary
- b Bio-Medical Technology Wing, Sree Chitra Tirunal Institute of Medical Sciences, Poojapura, Trivandrum, India
| | - Sudip K. Ghosh
- c Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
| | - S. C. Kundu
- d Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
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Mai-ngam K, Boonkitpattarakul K, Jaipaew J, Mai-ngam B. Evaluation of the Properties of Silk Fibroin Films from the Non-mulberry Silkworm Samia cynthia ricini for Biomaterial Design. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 22:2001-22. [DOI: 10.1163/092050610x530964] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Katanchalee Mai-ngam
- a National Metal and Materials Technology Center, Thailand Science Park, 114 Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand.
| | - Kanhokthorn Boonkitpattarakul
- b National Metal and Materials Technology Center, Thailand Science Park, 114 Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand
| | - Jirayut Jaipaew
- c National Metal and Materials Technology Center, Thailand Science Park, 114 Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand
| | - Bunpot Mai-ngam
- d National Metal and Materials Technology Center, Thailand Science Park, 114 Paholyothin Road, Klong 1, Klong Luang, Pathumthani 12120, Thailand
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Kundu SC, Kundu B, Talukdar S, Bano S, Nayak S, Kundu J, Mandal BB, Bhardwaj N, Botlagunta M, Dash BC, Acharya C, Ghosh AK. Nonmulberry silk biopolymers. Biopolymers 2012; 97:455-67. [DOI: 10.1002/bip.22024] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 12/21/2011] [Indexed: 11/10/2022]
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Selection of silk-binding peptides by phage display. Biotechnol Lett 2011; 33:1069-73. [PMID: 21259034 PMCID: PMC3082026 DOI: 10.1007/s10529-011-0519-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 01/05/2011] [Indexed: 01/26/2023]
Abstract
Peptides that bind to silkworm-derived silk fibroin fiber were selected from a phage-displayed random peptide library. The selected silk-binding peptides contained a consensus sequence QSWS which is important for silk-binding as confirmed by binding assays using phage and synthetic peptides. With further optimization, we anticipate that the silk-binding peptides will be useful for functionalization of silk for biomaterial applications.
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31
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Liu TL, Miao JC, Sheng WH, Xie YF, Huang Q, Shan YB, Yang JC. Cytocompatibility of regenerated silk fibroin film: a medical biomaterial applicable to wound healing. J Zhejiang Univ Sci B 2010; 11:10-6. [PMID: 20043346 DOI: 10.1631/jzus.b0900163] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To explore the feasibility of using regenerated silk fibroin membrane to construct artificial skin substitutes for wound healing, it is necessary to evaluate its cytocompatibility. METHODS The effects of regenerated silk fibroin film on cytotoxicity, adhesion, cell cycle, and apoptosis of L929 cells, growth and vascular endothelial growth factor (VEGF) expression of ECV304 cells, and VEGF, angiopoietin-1 (Ang-1), platelet-derived growth factor (PDGF) and fibroblast growth factor 2 (FGF2) expression of WI-38 cells were assessed by 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay, viable cell counting, flow cytometry (FCM), and enzyme-linked immunosorbant assay (ELISA). RESULTS We showed that the regenerated silk fibroin film was not cytotoxic to L929 cells and had no adverse influence on their adhesion, cell cycle or apoptosis; it had no adverse influence on the growth and VEGF secretion of ECV304 cells and no effect on the secretion of VEGF, Ang-1, PDGF and FGF2 by WI-38 cells. CONCLUSION The regenerated silk fibroin film should be an excellent biomaterial with good cytocompatibility, providing a framework for reparation after trauma in clinical applications.
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Affiliation(s)
- Tie-lian Liu
- Cell and Molecular Biology Institute, College of Medicine, Soochow University, Suzhou 215123, China
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Tanaka C, Asakura T. Synthesis and characterization of cell-adhesive silk-like proteins constructed from the sequences of Anaphe silk fibroin and fibronectin. Biomacromolecules 2010; 10:923-8. [PMID: 19236090 DOI: 10.1021/bm801439t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
New silk-like recombinant proteins, [(AAG)(6)ASTGRGDSPAAS](n) and [(AG)(9)ASTGRGDSPAAS](n), with high cell adhesive activities were designed and produced from E. coli. These are recombinant proteins with characteristic sequences from the silk fibroin of a wild silkworm, Anaphe , and the cell adhesive region, including the sequence RGD derived from fibronectin. They showed higher cell adhesion activity than the parent protein, Anaphe silk fibroin without the RGD sequence. In addition, the activities were very similar to that of collagen, which acted as a positive control. Thus, it is demonstrated that the primary structure of Anaphe silk fibroin, which is composed largely of alanine and glycine residues, can be used as a platform for the basic structures of silk-like cell adhesive proteins. The structural characterization of the silk-like recombinant proteins was performed with (13)C CP/MAS NMR.
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Affiliation(s)
- Chikako Tanaka
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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33
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Capar G, Aygun SS, Gecit MR. Separation of sericin from fatty acids towards its recovery from silk degumming wastewaters. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.06.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Acharya C, Ghosh SK, Kundu SC. Silk fibroin protein from mulberry and non-mulberry silkworms: cytotoxicity, biocompatibility and kinetics of L929 murine fibroblast adhesion. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2827-2836. [PMID: 18322779 DOI: 10.1007/s10856-008-3408-3] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 02/07/2008] [Indexed: 05/26/2023]
Abstract
Silks fibers and films fabricated from fibroin protein of domesticated mulberry silkworm cocoon have been traditionally utilized as sutures in surgery and recently as biomaterial films respectively. Here, we explore the possibility of application of silk fibroin protein from non-mulberry silkworm cocoon as a potential biomaterial aid. In terms of direct inflammatory potential, fibroin proteins from Antheraea mylitta and Bombyx mori are immunologically inert and invoke minimal immune response. Stimulation of murine peritoneal macrophages and RAW 264.7 murine macrophages by these fibroin proteins both in solution and in the form of films assayed in terms of nitric oxide and TNFalpha production showed comparable stimulation as in collagen. Kinetics of adhesion of L929 murine fibroblasts, for biocompatibility evaluation, monitored every 4 h from seeding and studied over a period of 24 h, reveal A. mylitta fibroin film to be a better substrate in terms of rapid and easier cellularization. Cell viability studies by MTT assay and flow cytometric analyses indicate the ability of fibroin matrices to support cell growth and proliferation comparable to collagen for long-term culture. This matrix may have potential to serve in those injuries where rapid cellularization is essential.
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Affiliation(s)
- Chitrangada Acharya
- Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India
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35
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Abstract
In the present study, hydroxyapatite (HA) /silk fibroin (SF) nanocomposite containing 40
wt % of SF, was synthesized in an aqueous solution of CaCl2/(NH4)2HPO4 system containing SF to
mimic bone structure of nano HA crystallites in organic matrix. The experimental results show that
SF promotes the preferential growth of nano HA crystallites along the plane (002) which indicates the
interaction between nano HA crystallites and SF. The nanocomposite with nano HA crystallites
dispersed homogeneously in SF matrix possesses a compression strength of 97.6 MPa higher than
that of woven bone. The methodology has a great potential for designing and engineering of
biomaterials with improved biological properties. The novel nanocomposite may be used as bone
substitutes and tissue engineering scaffolds.
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36
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Hu BW, Zhou P, Noda I, Ruan QX. Generalized Two-Dimensional Correlation Analysis of NMR and Raman Spectra for Structural Evolution Characterizations of Silk Fibroin. J Phys Chem B 2006; 110:18046-51. [PMID: 16956296 DOI: 10.1021/jp062461y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Generalized two-dimensional (2D) correlation spectroscopy was used to characterize the structural evolution of silk fibroin as the pH changed from 6.8 to 4.8, demonstrating that the conformational transitions of silk fibroin are induced step by step as the pH decreases. 2D homo- and hetero-spectral correlation spectroscopy was used to establish the relationship between information extracted from NMR and Raman spectroscopy. This novel method reveals the structural evolution using two probes with different frequency scales (10(5-9) Hz for nuclear spin motion and 10(12-14) Hz for molecular vibration motion), reflecting the different spatial scale sensitivity to the molecular conformational change. The transition order is identified as silk I state (helix dominant) --> silk I intermediate state --> silk II intermediate state --> silk II state (beta-sheet dominant), as the pH decreases. The results may rationalize the silkworm spinning process, which undergoes the conformational transition steadily from the soluble helix state to the insoluble beta-sheet state as the pH decreases from the posterior to anterior glands.
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Affiliation(s)
- Bing-Wen Hu
- The Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433, P. R. China
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37
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Zhang YQ, Zhou WL, Shen WD, Chen YH, Zha XM, Shirai K, Kiguchi K. Synthesis, characterization and immunogenicity of silk fibroin-l-asparaginase bioconjugates. J Biotechnol 2005; 120:315-26. [PMID: 16102867 DOI: 10.1016/j.jbiotec.2005.06.027] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Revised: 06/05/2005] [Accepted: 06/20/2005] [Indexed: 11/18/2022]
Abstract
L-asparaginase (ASNase) is one basic drug in the treatment of acute lymphoblastic leukemia (ALL). Because its half-life time is too short and it is easy to arouse allergic reaction, use in practical clinic is considerably limited. Silk fibroin (SF) with different molecular mass from 40 to 120 kDa is a natural biocompatible protein and could be used as a novel bioconjugate for enzyme modification to overcome its usual shortcomings mentioned above. When the enzyme was bioconjugated covalently with the water-soluble fibroin by glutaraldehyde, the enzyme kinetic properties and immune characteristics in vivo of the resulting silk fibroin-L-asparaginase (SF-ASNase) bioconjugates were investigated in detail. The results show that the modified ASNase was characterized by its higher residual activity (nearly 80%), increased heat and storage stability and resistance to trypsin digestion, and its longer half-life (63 h) than that of intact ASNase (33 h). The abilities of intact and modified ASNases to arouse allergic reaction are 2(4) and 2(1) antibody titers, respectively. Bioconjugation of silk fibroin significantly helps to reduce the immunogenicity and antigenicity of the enzyme. The apparent Michaelis constants of the modified ASNase (K(m(app))=0.844 x 10(-3)mol L(-1)) was approximately six times lower than that of enzyme alone, which suggests that the affinity of the enzyme to substrate l-asparagine elevated when bioconjugated covalently with silk fibroin. SF-ASNase bioconjugates could overcome the common shortcomings of the native form. Therefore, the modified ASNase coupled with silk fibroin has the potential values of being studied and developed as a new bioconjugate drug.
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Affiliation(s)
- Yu-Qing Zhang
- Silk Biotechnology Laboratory, School of Life Science, Soochow University, No. 1 Shizi Street, Suzhou, Jiangsu 215006, PR China
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38
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Abstract
Nanocomposites of hydroxyapatite-fibroin (HA-FB) were prepared using the biomimetic process. The Nanocomposites were detected with X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The FTIR results showed that chemical bond forms between HA nanocrystals and fibroin protein. The secondary structure of fibroin can be affected by the mineralization process. TGA results indicated the content of mineralized fibroin in the nanocomposites can be freely adjusted by changing the initial concentration of fibroin solution. TEM image showed that the diameter of the single mineralized nanofibrils is about 2-3 nm and the nanofibrils can aggregate into bundles with the size of 6-8 nm in width and 30-60 nm in length.
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39
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Tai PL, Hwang GY, Tso IM. Inter-specific sequence conservation and intra-individual sequence variation in a spider silk gene. Int J Biol Macromol 2005; 34:295-301. [PMID: 15556231 DOI: 10.1016/j.ijbiomac.2004.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Currently, studies on major ampullate spidroin 1 (MaSp1) genes of non-orb weaving spiders are few, and it is not clear whether genes of these organisms exhibit the same characteristics as those of orb-weavers. In addition, many studies have proposed that MaSp1 might be a single gene with allelic variants, but supporting evidence is still lacking. In this study, we compared partial DNA and amino acid sequences of MaSp1 cloned from different spider guilds. We also cloned partial MaSp1 sequences from genomic DNA and cDNA of the same individuals of spiders using the same primer combination to see if different molecular forms existed. In the repetitive region of partial MaSp1 sequences obtained, GGX, GA and poly-A motifs were present in all Araneomorphae and Mygalomorpae species examined. An extreme similarity in MaSp1 non-repetitive portions was found in sequences of ecribellate, cribellate and Mygalomorphae web-builders and such a result suggested that this sequence might exhibit an important function. A comparison of sequences amplified from the same individual showed that substitutions in amino acids occurred in both repetitive and non-repetitive regions, with a much higher variation in the former. These results suggest that the MaSp1 of Araneomorphae spiders exhibits several forms in an individual spider and it might be either a multiple gene or a single gene with a multiple exon/intron organization.
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Affiliation(s)
- Pei-Ling Tai
- Department of Life Science, Tunghai University, Taichung 407, Taiwan
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40
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Cheng Q, Peng TZ, Hu XB, Yang CF. Charge-selective recognition at fibroin-modified electrodes for analytical application. Anal Bioanal Chem 2005; 382:80-4. [PMID: 15900455 DOI: 10.1007/s00216-005-3150-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2004] [Revised: 01/26/2005] [Accepted: 02/01/2005] [Indexed: 11/25/2022]
Abstract
A novel fibroin-modified electrode with charge recognition is reported. The characteristics of silk fibroin membranes have been exploited for analytical applications. The membrane, with an isoelectric point of pH 4.5, was applied to graphite and carbon-fiber electrodes. The modified electrode was negatively charged in solutions of pH > 4.5, and so rejected anions and attracted cations. In solutions of pH < 4.5 the electrode was positively charged, and so rejected cations and attracted anions. The pH-responsive charge recognition of the modified electrode was investigated for some neurocompounds. A fibroin carbon-fiber electrode was used for in-vivo determination of the concentration of the cationic neurotransmitter dopamine (DA).
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Affiliation(s)
- Qiong Cheng
- Department of Chemistry, Xixi Campus, Zhejiang University, 310028, Hangzhou, P.R. China
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41
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Putthanarat S, Eby R, Naik RR, Juhl SB, Walker MA, Peterman E, Ristich S, Magoshi J, Tanaka T, Stone MO, Farmer B, Brewer C, Ott D. Nonlinear optical transmission of silk/green fluorescent protein (GFP) films. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.10.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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42
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Abstract
Regenerated silk fibroin (SF) filaments were prepared by the wet spinning technique. The rheological behavior of the SF dope solution prepared with formic acid was examined and the drawing effect on the structural characteristics and mechanical properties of SF filament was comparatively studied with those of natural silk fiber. SF dope exhibited shear thinning, but, as the dope concentration increased, the effect of shear thinning decreased, an indication that a higher concentration of dope solution will result in good spinnability. Wet-spun SF filaments exhibited a uniform and circular cross-sectional shape and dense morphology under SEM observation. X-ray diffraction (XRD) results revealed that the crystallinity of wet-spun regenerated filaments was hardly affected by the draw ratio, whereas the crystalline and amorphous orientation of regenerated SF filament showed different features depending on the drawing. The crystalline orientation of regenerated filaments increased with an increase of draw ratio and was lower than that of natural silk fiber. On the contrary, the amorphous orientation was constant throughout 1X-5X draw ratios, after an abrupt increase at 1X, and was higher than that of natural silk fiber. These differences in the orientation behaviors are attributed to the different spinning mechanisms involved. The tensile property was strongly dependent on the draw ratio. The breaking strength and elongation of the regenerated filament at 5X draw ratio were 2.2 g/day and 17%, respectively.
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Affiliation(s)
- In Chul Um
- Department of Natural Fiber Sciences, Seoul National University, Seoul 151-742, South Korea
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43
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Kramer MG. Recent advances in transgenic arthropod technology. BULLETIN OF ENTOMOLOGICAL RESEARCH 2004; 94:95-110. [PMID: 15153293 DOI: 10.1079/ber2003290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The ability to insert foreign genes into arthropod genomes has led to a diverse set of potential applications for transgenic arthropods, many of which are designed to advance public health or improve agricultural production. New techniques for expressing foreign genes in arthropods have now been successfully used in at least 18 different genera. However, advances in field biology are lagging far behind those in the laboratory, and considerable work is needed before deployment in nature can be a reality. A mechanism to drive the gene of interest though a natural population must be developed and thoroughly evaluated before any field release, but progress in this area has been limited. Likewise, serious consideration of potential risks associated with deployment in nature has been lacking. This review gives an overview of the most promising techniques for expressing foreign genes in arthropods, considers the potential risks associated with their deployment, and highlights the areas of research that are most urgently needed for the field to advance out of the laboratory and into practice.
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Affiliation(s)
- M G Kramer
- US Environmental Protection Agency, Office of Science Coordination and Policy, Washington, DC 20460, USA.
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44
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Foy BD, Myles KM, Pierro DJ, Sanchez-Vargas I, Uhlírová M, Jindra M, Beaty BJ, Olson KE. Development of a new Sindbis virus transducing system and its characterization in three Culicine mosquitoes and two Lepidopteran species. INSECT MOLECULAR BIOLOGY 2004; 13:89-100. [PMID: 14728670 DOI: 10.1111/j.1365-2583.2004.00464.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Alphavirus transducing systems (ATSs) are alphavirus-based tools for expressing genes in insects. Here we describe an ATS (5'dsMRE16ic) based entirely on Sindbis MRE16 virus. GFP expression was used to characterize alimentary tract infections and dissemination in three Culicine and two Lepidopteran species. Following per os infection, 5'dsMRE16ic-EGFP efficiently infected Aedes aegypti and Culex tritaeniorhynchus, but not Culex pipiens pipiens. Ae. aegypti clearly showed accumulation of green fluorescent protein (GFP) in the posterior midgut and foregut/midgut junction within 2-3 days postinfection. Following parenteral infection of larvae, Bombyx mori had extensive GFP expression in larvae and adults, but Manduca sexta larvae were mostly resistant. 5'dsMRE16ic should be a valuable tool for gene expression in several important insect species that are otherwise difficult to manipulate genetically.
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Affiliation(s)
- B D Foy
- Arthropod-Borne and Infectious Diseases Laboratory, Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
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45
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Um IC, Kweon HY, Lee KG, Park YH. The role of formic acid in solution stability and crystallization of silk protein polymer. Int J Biol Macromol 2003; 33:203-13. [PMID: 14607365 DOI: 10.1016/j.ijbiomac.2003.08.004] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In this paper, the regenerated silk fibroin (SF) solution dissolved in formic acid was used as a model protein to understand the role of formic acid in solution stability and crystallization of protein-based materials. The molecular decomposition of SF did not occur for the dissolution process in formic acid within 1-2 days of storage times. The beta-sheet crystallization of SF molecules was occurred by the elimination of formic acid upon drying. The SF molecules in formic acid solution are stable and have low hydrodynamic radius values. This may be closely related to the fact that formic acid has two opposite functions of dissolution and crystallization simultaneously. The turbidity, dynamic light scattering and FTIR measurements elucidate that the solution stability and crystallization of SF are attributed to compact molecular shape of SF in formic acid, resulted from the molecular interactions between formic acid and polar groups in SF molecules.
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Affiliation(s)
- In Chul Um
- Department of Natural Fiber Sciences, Seoul National University, Suwon 441-744, South Korea
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