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Asakura T, Shimokawatoko H, Nakazawa Y. Characterization and promotion of endothelialization of Bombyx mori silk fibroin functionalized with REDV peptide. Int J Biol Macromol 2024; 261:129746. [PMID: 38302025 DOI: 10.1016/j.ijbiomac.2024.129746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 02/03/2024]
Abstract
In the development of small-diameter vascular grafts, it is crucial to achieve early-stage endothelialization to prevent thrombus formation and intimal hyperplasia. Silk fibroin (SF) from Bombyx mori is commonly used for such grafts. However, there is a need to expedite endothelialization post-implantation. In this study, we functionalized SF with Arg-Glu-Asp-Val (REDV) (SF + REDV) using cyanuric chloride to enhance endothelialization. The immobilization of REDV onto SF was confirmed and the amount of immobilized REDV could be calculated by 1H NMR. Furthermore, the conformational changes in Tyr, Ser, and Ala residues in [3-13C]Tyr- and [3-13C]Ser-SF due to REDV immobilization were monitored using 13C solid-state NMR. The REDV immobilized onto the SF film was found to be exposed on the film's surface, as confirmed by biotin-avidin system. Cell culture experiments, including adhesiveness, proliferation, and extensibility, were conducted using normal human umbilical vein endothelial cells (HUVEC) and normal human aortic smooth muscle cells (HAoSMC) on both SF and SF + REDV films to evaluate the impact of REDV on endothelialization. The results indicated a trend towards promoting HUVEC proliferation while inhibiting HAoSMC proliferation. Therefore, these findings suggest that SF + REDV may be more suitable than SF alone for coating small-diameter SF knitted tubes made of SF threads.
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Affiliation(s)
- Tetsuo Asakura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan.
| | - Haruka Shimokawatoko
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Yasumoto Nakazawa
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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Liu X, Zhao L, Wu B, Chen F. Improving solubility of poorly water-soluble drugs by protein-based strategy: A review. Int J Pharm 2023; 634:122704. [PMID: 36758883 DOI: 10.1016/j.ijpharm.2023.122704] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/30/2023] [Accepted: 02/04/2023] [Indexed: 02/10/2023]
Abstract
Poorly water-soluble drugs are frequently encountered and present a most challengeable difficulty in pharmaceutical development. Poor solubility of drugs can lead to suboptimal bioavailability and therapeutic efficiency. Increasing efforts have been contributed to improve the solubility of poorly water-soluble drugs for better pharmacokinetics and pharmacodynamics. Among various solubility enhancement technologies, protein-based strategy to address poorly water-soluble drugs issues has special interests for natural advantages including versatile interactions between proteins and hydrophobic drugs, biocompatibility, biodegradation, and metabolization of proteins. The protein-drug formulations could be formed by covalent conjugations or noncovalent interactions to facilitate solubility of poorly water-soluble drugs. This review is to summarize the advances using proteins including plant proteins, mammalian proteins, and recombinant proteins, to enhance water solubility of poorly water-soluble drugs.
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Affiliation(s)
- Xiaowen Liu
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China.
| | - Limin Zhao
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China
| | - Baojian Wu
- Institute of Molecular Rhythm and Metabolism, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Fener Chen
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China; Shanghai Engineering Research Center of Industrial Asymmetric Catalysis of Chiral Drugs, 220 Handan Road, Shanghai 200433, China.
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3
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Zhang ZQ, Yang YX, Li JA, Zeng RC, Guan SK. Advances in coatings on magnesium alloys for cardiovascular stents - A review. Bioact Mater 2021; 6:4729-4757. [PMID: 34136723 PMCID: PMC8166647 DOI: 10.1016/j.bioactmat.2021.04.044] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 12/15/2022] Open
Abstract
Magnesium (Mg) and its alloys, as potential biodegradable materials, have drawn wide attention in the cardiovascular stent field because of their appropriate mechanical properties and biocompatibility. Nevertheless, the occurrence of thrombosis, inflammation, and restenosis of implanted Mg alloy stents caused by their poor corrosion resistance and insufficient endothelialization restrains their anticipated clinical applications. Numerous surface treatment tactics have mainly striven to modify the Mg alloy for inhibiting its degradation rate and enduing it with biological functionality. This review focuses on highlighting and summarizing the latest research progress in functionalized coatings on Mg alloys for cardiovascular stents over the last decade, regarding preparation strategies for metal oxide, metal hydroxide, inorganic nonmetallic, polymer, and their composite coatings; and the performance of these strategies in regulating degradation behavior and biofunction. Potential research direction is also concisely discussed to help guide biological functionalized strategies and inspire further innovations. It is hoped that this review can give assistance to the surface modification of cardiovascular Mg-based stents and promote future advancements in this emerging research field.
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Affiliation(s)
- Zhao-Qi Zhang
- School of Material Science and Engineering & Henan Key Laboratory of Advanced Magnesium Alloy & Key Laboratory of Materials Processing and Mold Technology (Ministry of Education), Zhengzhou University, 100 Science Road, Zhengzhou, 450001, PR China
| | - Yong-Xin Yang
- School of Material Science and Engineering & Henan Key Laboratory of Advanced Magnesium Alloy & Key Laboratory of Materials Processing and Mold Technology (Ministry of Education), Zhengzhou University, 100 Science Road, Zhengzhou, 450001, PR China
| | - Jing-An Li
- School of Material Science and Engineering & Henan Key Laboratory of Advanced Magnesium Alloy & Key Laboratory of Materials Processing and Mold Technology (Ministry of Education), Zhengzhou University, 100 Science Road, Zhengzhou, 450001, PR China
| | - Rong-Chang Zeng
- Corrosion Laboratory for Light Metals, College of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China
| | - Shao-Kang Guan
- School of Material Science and Engineering & Henan Key Laboratory of Advanced Magnesium Alloy & Key Laboratory of Materials Processing and Mold Technology (Ministry of Education), Zhengzhou University, 100 Science Road, Zhengzhou, 450001, PR China
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Chambre L, Martín-Moldes Z, Parker RN, Kaplan DL. Bioengineered elastin- and silk-biomaterials for drug and gene delivery. Adv Drug Deliv Rev 2020; 160:186-198. [PMID: 33080258 PMCID: PMC7736173 DOI: 10.1016/j.addr.2020.10.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/30/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
Advances in medical science have led to diverse new therapeutic modalities, as well as enhanced understanding of the progression of various disease states. These findings facilitate the design and development of more customized and exquisite drug delivery systems that aim to improve therapeutic indices of drugs to treat a variety of conditions. Synthetic polymer-based drug carriers have often been the focus of such research. However, these structures suffer from challenges with heterogeneity of the starting material, limited chemical features, complex functionalization methods, and in some cases a lack of biocompatibility. Consequently, protein-based polymers have garnered much attention in recent years due to their monodisperse features, ease of production and functionalization, and biocompatibility. Genetic engineering techniques enable the advancement of protein-based drug delivery systems with finely tuned physicochemical properties, and thus an expanded level of customization unavailable with synthetic polymers. Of these genetically engineered proteins, elastin-like proteins (ELP), silk-like proteins (SLP), and silk-elastin-like proteins (SELP) provide a unique set of alternatives for designing drug delivery systems due to their inherent chemical and physical properties and ease of engineering afforded by recombinant DNA technologies. In this review we examine the advantages of genetically engineered drug delivery systems with emphasis on ELP and SLP constructions. Methods for fabrication and relevant biomedical applications will also be discussed.
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Affiliation(s)
- Laura Chambre
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA
| | - Zaira Martín-Moldes
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA
| | - Rachael N Parker
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby St, Medford, MA 02155, USA.
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Zhong J, Ma M, Li W, Zhou J, Yan Z, He D. Self-assembly of regenerated silk fibroin from random coil nanostructures to antiparallel β-sheet nanostructures. Biopolymers 2016; 101:1181-92. [PMID: 25088327 DOI: 10.1002/bip.22532] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 07/12/2014] [Accepted: 07/22/2014] [Indexed: 01/26/2023]
Abstract
In this work, we studied the effects of incubation concentration and time on the self-assembly behaviors of regenerated silk fibroin (RSF). Our results showed the assembly ways of RSF were concentration-dependent and there were four self-assembly ways of RSF: (i) At relatively low concentration (≤0.015%), RSF molecules assembled into protofilaments (random coil), and then the thickness decreased and the secondary conformation changed to antiparallel β-sheet; (ii) at the concentration of 0.015%, RSF molecules assembled into protofilaments (random coil), and then assembled into protofibrils (antiparallel β-sheet). The protofibrils experienced the appearance and disappearance of phase periodic intervals in turn; (iii) at the concentration of 0.03%, RSF molecules assembled into bead-like oligomers (random coil), and then assembled into protofibrils (antiparallel β-sheet), and finally the height and phase periodic intervals of RSF protofibrils disappeared in turn; and (iv) at the relatively high concentration (≥0.15%), RSF molecules assembled into protofilaments (random coil), then aggregated into blurry cuboid-like micelles (random coil), and finally self-arranged to form smooth and clear cuboid-like micelles (antiparallel β-sheet). These results provide useful insights into the process by which the RSF molecules self-assemble into protofilaments, protofibrils and micelles. Furthermore, our work will be beneficial to basic understanding of the nanoscale structure formations in different silk-based biomaterials.
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Affiliation(s)
- Jian Zhong
- National Engineering Research Center for Nanotechnology, Shanghai, 200241, People's Republic of China
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Freeman R, Boekhoven J, Dickerson MB, Naik RR, Stupp SI. Biopolymers and supramolecular polymers as biomaterials for biomedical applications. MRS BULLETIN 2015; 40:1089-1101. [PMID: 26989295 PMCID: PMC4790466 DOI: 10.1557/mrs.2015.270] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Protein- and peptide-based structural biopolymers are abundant building blocks of biological systems. Either in their natural forms, such as collagen, silk or fibronectin, or as related synthetic materials they can be used in various technologies. An emerging area is that of biomimetic materials inspired by protein-based biopolymers, which are made up of small molecules rather than macromolecules and can therefore be described as supramolecular polymers. These materials are very useful in biomedical applications because of their ability to imitate the extracellular matrix both in architecture and their capacity to signal cells. This article describes important features of the natural extracellular matrix and highlight how these features are being incorporated into biomaterials composed of biopolymers and supramolecular polymers. We particularly focus on the structures, properties, and functions of collagen, fibronectin, silk, and the supramolecular polymers inspired by them as biomaterials for regenerative medicine.
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Affiliation(s)
- Ronit Freeman
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Job Boekhoven
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
| | - Matthew B Dickerson
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433-7702
| | - Rajesh R Naik
- 711 Human Performance Wing, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433-7702
| | - Samuel I Stupp
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, Chicago, IL 60611, USA; Departments of Materials and Science & Engineering, Chemistry, Medicine, and Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
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The Silk I and Lamella Structures of (Ala-Gly)15 as the Model of Bombyx mori Silk Fibroin Studied with Solid State NMR. BIOTECHNOLOGY OF SILK 2014. [DOI: 10.1007/978-94-007-7119-2_3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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8
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Asakura T, Isozaki M, Saotome T, Tatematsu KI, Sezutsu H, Kuwabara N, Nakazawa Y. Recombinant silk fibroin incorporated cell-adhesive sequences produced by transgenic silkworm as a possible candidate for use in vascular graft. J Mater Chem B 2014; 2:7375-7383. [DOI: 10.1039/c4tb01301h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transgenic silk fibroins that incorporated the laminin sequence were prepared. The adhesive activities tend to increase in the TG silk fibroins relative to WT silk fibroins.
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Affiliation(s)
- Tetsuo Asakura
- Department of Biotechnology
- Tokyo University of Agriculture and Technology
- Koganei, Japan
| | - Makoto Isozaki
- Department of Biotechnology
- Tokyo University of Agriculture and Technology
- Koganei, Japan
| | - Toshiki Saotome
- Department of Biotechnology
- Tokyo University of Agriculture and Technology
- Koganei, Japan
| | - Ken-ichiro Tatematsu
- Transgenic Silkworm Research Unit
- National Institute of Agrobiological Sciences
- Tsukuba, Japan
| | - Hideki Sezutsu
- Transgenic Silkworm Research Unit
- National Institute of Agrobiological Sciences
- Tsukuba, Japan
| | | | - Yasumoto Nakazawa
- Department of Biotechnology
- Tokyo University of Agriculture and Technology
- Koganei, Japan
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Asakura T, Suzuki Y, Nagano A, Knight D, Kamiya M, Demura M. Synthesis and Characterization of Water-Soluble Silk Peptides and Recombinant Silk Protein Containing Polyalanine, the Integrin Binding Site, and Two Glutamic Acids at Each Terminal Site as a Possible Candidate for Use in Bone Repair Materials. Biomacromolecules 2013; 14:3731-41. [DOI: 10.1021/bm401118m] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tetsuo Asakura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Yu Suzuki
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Aya Nagano
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - David Knight
- Oxford Biomaterials, Ltd., Magdalen Centre, Oxford, OX4 4GA, United Kingdom
| | - Masakatsu Kamiya
- Graduate School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Makoto Demura
- Graduate School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
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11
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Frandsen JL, Ghandehari H. Recombinant protein-based polymers for advanced drug delivery. Chem Soc Rev 2012; 41:2696-706. [DOI: 10.1039/c2cs15303c] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Asakura T, Nishi H, Nagano A, Yoshida A, Nakazawa Y, Kamiya M, Demura M. NMR Analysis of the Fibronectin Cell-Adhesive Sequence, Arg-Gly-Asp, in a Recombinant Silk-Like Protein and a Model Peptide. Biomacromolecules 2011; 12:3910-6. [DOI: 10.1021/bm2011196] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tetsuo Asakura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Hirohito Nishi
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Aya Nagano
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
- Research Department, Japan Medical Materials Corporation, Osaka 532-0003, Japan
| | - Ai Yoshida
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Yasumoto Nakazawa
- Nature and Science Museum, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Masakatsu Kamiya
- Graduate School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Makoto Demura
- Graduate School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
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NAKAZAWA CT. Structural Analyses of Silk Fibroin from Wild Silkworms and the Application for Cell Adhesive Materials. KOBUNSHI RONBUNSHU 2011. [DOI: 10.1295/koron.68.540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Numata K, Kaplan DL. Silk-based delivery systems of bioactive molecules. Adv Drug Deliv Rev 2010; 62:1497-508. [PMID: 20298729 DOI: 10.1016/j.addr.2010.03.009] [Citation(s) in RCA: 238] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Revised: 03/02/2010] [Accepted: 03/10/2010] [Indexed: 12/12/2022]
Abstract
Silks are biodegradable, biocompatible, self-assembling proteins that can also be tailored via genetic engineering to contain specific chemical features, offering utility for drug and gene delivery. Silkworm silk has been used in biomedical sutures for decades and has recently achieved Food and Drug Administration approval for expanded biomaterials device utility. With the diversity and control of size, structure and chemistry, modified or recombinant silk proteins can be designed and utilized in various biomedical application, such as for the delivery of bioactive molecules. This review focuses on the biosynthesis and applications of silk-based multi-block copolymer systems and related silk protein drug delivery systems. The utility of these systems for the delivery of small molecule drugs, proteins and genes is reviewed.
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Affiliation(s)
- Keiji Numata
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
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15
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Top A, Kiick KL. Multivalent protein polymers with controlled chemical and physical properties. Adv Drug Deliv Rev 2010; 62:1530-40. [PMID: 20562016 PMCID: PMC3025749 DOI: 10.1016/j.addr.2010.05.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Revised: 05/04/2010] [Accepted: 05/07/2010] [Indexed: 10/19/2022]
Abstract
In this review, we describe our work on the design, characterization, and modification of a series of alanine-rich helical polypeptides with novel functions. Glycosylation of the polypeptides has permitted investigation of polymer architecture effects on multivalent interactions. One of the members of this polypeptide family exhibits polymorphological behavior that is easily manipulated via simple changes in solution pH and temperature. Polypeptide-based fibrils formed at acidic pH and high temperature were shown to direct the one-dimensional organization of gold nanoparticles via electrostatic interactions. As a precursor to fibrils, aggregates likely comprising alanine-rich cores form at low temperatures and acidic pH and reversibly dissociate into monomers upon deprotonation. PEGylation of these polypeptides does not alter the self-association or conformational behavior of the polypeptide, suggesting potential applications in the development of assembled delivery vehicles, as modification of the polypeptides should be a useful strategy for controlling assembly.
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Affiliation(s)
- Ayben Top
- Department of Materials Science and Engineering, 201 DuPont Hall, University of Delaware, Newark, Delaware 19716
| | - Kristi L. Kiick
- Department of Materials Science and Engineering, 201 DuPont Hall, University of Delaware, Newark, Delaware 19716
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16
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NAKAZAWA Y. Structural Analysis and Application to Biomaterials of the Silk Fibroins. KOBUNSHI RONBUNSHU 2010. [DOI: 10.1295/koron.67.428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Suzuki Y, Takahashi R, Shimizu T, Tansho M, Yamauchi K, Williamson MP, Asakura T. Intra- and Intermolecular Effects on 1H Chemical Shifts in a Silk Model Peptide Determined by High-Field Solid State 1H NMR and Empirical Calculations. J Phys Chem B 2009; 113:9756-61. [DOI: 10.1021/jp903020p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu Suzuki
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
| | - Rui Takahashi
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
| | - Tadashi Shimizu
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
| | - Masataka Tansho
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
| | - Kazuo Yamauchi
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
| | - Mike P. Williamson
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
| | - Tetsuo Asakura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan, National Institute for Material Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank Sheffield S10 2TN, U.K
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