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Zhou J, Li J, Du X, Xu B. Supramolecular biofunctional materials. Biomaterials 2017; 129:1-27. [PMID: 28319779 PMCID: PMC5470592 DOI: 10.1016/j.biomaterials.2017.03.014] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/09/2017] [Accepted: 03/10/2017] [Indexed: 12/27/2022]
Abstract
This review discusses supramolecular biofunctional materials, a novel class of biomaterials formed by small molecules that are held together via noncovalent interactions. The complexity of biology and relevant biomedical problems not only inspire, but also demand effective molecular design for functional materials. Supramolecular biofunctional materials offer (almost) unlimited possibilities and opportunities to address challenging biomedical problems. Rational molecular design of supramolecular biofunctional materials exploit powerful and versatile noncovalent interactions, which offer many advantages, such as responsiveness, reversibility, tunability, biomimicry, modularity, predictability, and, most importantly, adaptiveness. In this review, besides elaborating on the merits of supramolecular biofunctional materials (mainly in the form of hydrogels and/or nanoscale assemblies) resulting from noncovalent interactions, we also discuss the advantages of small peptides as a prevalent molecular platform to generate a wide range of supramolecular biofunctional materials for the applications in drug delivery, tissue engineering, immunology, cancer therapy, fluorescent imaging, and stem cell regulation. This review aims to provide a brief synopsis of recent achievements at the intersection of supramolecular chemistry and biomedical science in hope of contributing to the multidisciplinary research on supramolecular biofunctional materials for a wide range of applications. We envision that supramolecular biofunctional materials will contribute to the development of new therapies that will ultimately lead to a paradigm shift for developing next generation biomaterials for medicine.
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Affiliation(s)
- Jie Zhou
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Jie Li
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Xuewen Du
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Bing Xu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA.
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52
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Optimization, characterization, and in vitro assessment of alginate-pectin ionic cross-linked hydrogel film for wound dressing applications. Int J Biol Macromol 2017; 97:131-140. [DOI: 10.1016/j.ijbiomac.2016.12.079] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 12/16/2016] [Accepted: 12/30/2016] [Indexed: 11/20/2022]
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Li X, Fu M, Wu J, Zhang C, Deng X, Dhinakar A, Huang W, Qian H, Ge L. pH-sensitive peptide hydrogel for glucose-responsive insulin delivery. Acta Biomater 2017; 51:294-303. [PMID: 28069504 DOI: 10.1016/j.actbio.2017.01.016] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 12/13/2016] [Accepted: 01/05/2017] [Indexed: 12/21/2022]
Abstract
Glucose-responsive system is one of important options for self-regulated insulin delivery to treat diabetes, which has become an issue of great public health concern in the world. In this study, we developed a novel and biocompatible glucose-responsive insulin delivery system using a pH-sensitive peptide hydrogel as a carrier loaded with glucose oxidase, catalase and insulin. The peptide could self-assemble into hydrogel under physiological conditions. When hypoglycemia is encountered, neighboring alkaline amino acid side chains are significantly repulsed due to reduced local pH by the enzymatic conversion of glucose into gluconic acid. This is followed by unfolding of individual hairpins, disassembly and release of insulin. The glucose-responsive hydrogel system was characterized on the basis of structure, conformation, rheology, morphology, acid-sensitivity and the amount of consistent release of insulin in vitro and vivo. The results illustrated that our system can not only regulate the blood glucose levels in vitro but also in mice models having STZ-induced diabetes. STATEMENT OF SIGNIFICANCE In this report, we have shown the following significance supported by the experimental results. 1. We successfully developed, characterized and screened a novel pH-responsive peptide. 2. We successfully developed a novel and biocompatible pH-sensitive peptide hydrogel as glucose-responsive insulin delivery system loaded with glucose oxidase, catalase and insulin. 3. We successfully confirmed that the hydrogel platform could regulate the blood glucose level in vitro and in vivo. Overall, we have shown enough significance and novelty with this smart hydrogel platform in terms of biomaterials, peptide chemistry, self-assembly, hydrogel and drug delivery. So we believe this manuscript is suitable for Acta Biomaterialia.
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Affiliation(s)
- Xue Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Mian Fu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Jun Wu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guang Dong Province, School of Engineering, Sun Yat-sen University, Guangzhou 510006, PR China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, Sun Yat-sen University, Guangzhou 510006, PR China.
| | - Chenyu Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Xin Deng
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Arvind Dhinakar
- University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada
| | - Wenlong Huang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China; Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China
| | - Hai Qian
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China; Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China.
| | - Liang Ge
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China.
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Worthington P, Langhans S, Pochan D. β-hairpin peptide hydrogels for package delivery. Adv Drug Deliv Rev 2017; 110-111:127-136. [PMID: 28257999 PMCID: PMC8628845 DOI: 10.1016/j.addr.2017.02.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 02/15/2017] [Accepted: 02/24/2017] [Indexed: 11/16/2022]
Abstract
The underlying challenge of drug delivery is the safe, controlled transport of a supply of therapeutic agent to its intended location at its effective dose. New and expanding solutions to payload delivery are being discovered in the field of hydrogels. Hydrogels are highly hydrated polymer networks that vary greatly depending on the underlying molecular structure. The subgroup of hydrogels that will be the focus of this chapter is the β-hairpin peptide hydrogel. These peptide-based materials are formed through a molecular self-assembly mechanism that only occurs after desired triggering of intramolecular peptide folding. Once folded, the β-hairpins assemble intermolecularly into a nanofibrillar network. The physical properties of the hydrogel network and its peptide foundation result in advantageous material properties which can be used for multiple biomedical applications including drug delivery. As a shear thinning solid that is easily injectable, cytocompatible, customizable, and well characterized, β-hairpin hydrogels are an exciting candidate as a drug delivery vehicle.
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Affiliation(s)
- Peter Worthington
- Department of Biomedical Engineering, Delaware Biotechnology Institute, University of Delaware, Newark, DE, USA; Nemours Center for Childhood Cancer Research, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Sigrid Langhans
- Nemours Center for Childhood Cancer Research, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Darrin Pochan
- Department of Materials Science and Engineering, Delaware Biotechnology Institute, University of Delaware, Newark, DE, USA.
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55
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Bian S, Cai H, Cui Y, He M, Cao W, Chen X, Sun Y, Liang J, Fan Y, Zhang X. Temperature and ion dual responsive biphenyl-dipeptide supramolecular hydrogels as extracellular matrix mimic-scaffolds for cell culture applications. J Mater Chem B 2017; 5:3667-3674. [DOI: 10.1039/c7tb00576h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Illustration of the gelation process of a new aromatic short peptide gelator based on biphenyl and its application in cell culture.
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Affiliation(s)
- Shaoquan Bian
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Hanxu Cai
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Yani Cui
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Mengmeng He
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Wanxu Cao
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Xuening Chen
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Yong Sun
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Jie Liang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Yujiang Fan
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
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56
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Dexter AF, Fletcher N, Creasey RG, Filardo F, Boehm MW, Jack KS. Fabrication and characterization of hydrogels formed from designer coiled-coil fibril-forming peptides. RSC Adv 2017. [DOI: 10.1039/c7ra02811c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
A peptide sequence was designed to form α-helical fibrils and hydrogels at physiological pH, utilising transient buffering by carbonic acid.
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Affiliation(s)
- A. F. Dexter
- The University of Queensland
- Australian Institute for Bioengineering and Biotechnology
- Australia
| | - N. L. Fletcher
- The University of Queensland
- Australian Institute for Bioengineering and Biotechnology
- Australia
| | - R. G. Creasey
- The University of Queensland
- School of Chemical Engineering
- Australia
| | - F. Filardo
- The University of Queensland
- Australian Institute for Bioengineering and Biotechnology
- Australia
| | - M. W. Boehm
- The University of Queensland
- School of Chemical Engineering
- Australia
| | - K. S. Jack
- The University of Queensland
- Centre for Microscopy and Microanalysis
- Australia
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57
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Rizzo C, Arrigo R, D'Anna F, Di Blasi F, Dintcheva NT, Lazzara G, Parisi F, Riela S, Spinelli G, Massaro M. Hybrid supramolecular gels of Fmoc-F/halloysite nanotubes: systems for sustained release of camptothecin. J Mater Chem B 2017; 5:3217-3229. [DOI: 10.1039/c7tb00297a] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Novel supramolecular gel hybrids were prepared by self-assembly of Fmoc-l-phenylalanine in the presence of functionalized halloysite nanotubes and employed as carriers for the delivery of camptothecin molecules.
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58
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Sun L, Zheng C, Webster TJ. Self-assembled peptide nanomaterials for biomedical applications: promises and pitfalls. Int J Nanomedicine 2016; 12:73-86. [PMID: 28053525 PMCID: PMC5191618 DOI: 10.2147/ijn.s117501] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Over the last several decades, a great number of advances have been made in the area of self-assembled supramolecules for regenerative medicine. Such advances have involved the design, preparation, and characterization of brand new self-assembled peptide nanomaterials for a variety of applications. Among all biomolecules considered for self-assembly applications, peptides have attracted a great deal of attention as building blocks for bottom-up fabrication, due to their versatility, ease of manufacturing, low costs, tunable structures, and versatile properties. Herein, some of the more exciting new designs of self-assembled peptides and their associated unique features are reviewed and several promising applications of how self-assembled peptides are advancing drug delivery, tissue engineering, antibacterial therapy, and biosensor device applications are highlighted.
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Affiliation(s)
- Linlin Sun
- Wenzhou Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Chunli Zheng
- Pharmaceutical Research Institute, China Pharmaceutical University, Nanjing, People’s Republic of China
| | - Thomas J Webster
- Wenzhou Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of China
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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59
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Sun JEP, Stewart B, Litan A, Lee SJ, Schneider JP, Langhans SA, Pochan DJ. Sustained release of active chemotherapeutics from injectable-solid β-hairpin peptide hydrogel. Biomater Sci 2016; 4:839-48. [PMID: 26906463 PMCID: PMC7802599 DOI: 10.1039/c5bm00538h] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
MAX8 β-hairpin peptide hydrogel is a solid, preformed gel that can be syringe injected due to shear-thinning properties and can recover solid gel properties immediately after injection. This behavior makes the hydrogel an excellent candidate as a local drug delivery vehicle. In this study, vincristine, a hydrophobic and commonly used chemotherapeutic, is encapsulated within MAX8 hydrogel and shown to release constantly over the course of one month. Vincristine was observed to be cytotoxic in vitro at picomolar to nanomolar concentrations. The amounts of drug released from the hydrogels over the entire time-course were in this concentration range. After encapsulation, release of vincristine from the hydrogel was observed for four weeks. Further characterization showed the vincristine released during the 28 days remained biologically active, well beyond its half-life in bulk aqueous solution. This study shows that vincristine-loaded MAX8 hydrogels are excellent candidates as drug delivery vehicles, through sustained, low, local and effective release of vincristine to a specific target. Oscillatory rheology was employed to show that the shear-thinning and re-healing, injectable-solid properties that make MAX8 a desirable drug delivery vehicle are unaffected by vincristine encapsulation. Rheology measurements also were used to monitor hydrogel nanostructure before and after drug encapsulation.
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Affiliation(s)
- Jessie E P Sun
- Department of Materials Science & Engineering, University of Delaware, Newark, DE 19176, USA.
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60
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Snigdha K, Singh BK, Mehta AS, Tewari RP, Dutta PK. Self-assembling N-(9-Fluorenylmethoxycarbonyl)-l-Phenylalanine hydrogel as novel drug carrier. Int J Biol Macromol 2016; 93:1639-1646. [PMID: 27126167 DOI: 10.1016/j.ijbiomac.2016.04.072] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/16/2016] [Accepted: 04/22/2016] [Indexed: 10/21/2022]
Abstract
Supramolecular hydrogel as a novel drug carrier was prepared from N-(9-Fluorenylmethoxycarbonyl) (Fmoc) modified l-phenylalanine. Its different properties like stability at different pH, temperature and rheology were evaluated in reference to salicylic acid (SA) as a model drug, entrapped in the supramolecular hydrogel network. The release behaviour of SA drug in supramolecular hydrogel was investigated by UV-vis spectroscopy. The influence of hydrogelator, pH values of the accepting media, temperature and concentration of SA drug on the release behaviour was investigated under static conditions. The results indicated that the release rate of SA in the supramolecular hydrogels was slightly retarded with an increase of the hydrogelator concentration. Also, the release rates of SA increased with an increase of temperature and its concentration. Furthermore, the release behaviour of SA was found to be different at various pH values in buffers. The study of the release kinetics indicated that the release behaviour of SA from the carrier was in accord with the Peppas model and the diffusion controlled mechanism involved in the Fickian model.
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Affiliation(s)
- Kirti Snigdha
- Department of Biology, University of Dayton, Dayton, OH, USA; Department of Applied Mechanics, Motilal Nehru National Institute of Technology, Allahabad-211004, India
| | - Brijesh K Singh
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India
| | - Abijeet Singh Mehta
- Department of Biology, University of Dayton, Dayton, OH, USA; Department of Applied Mechanics, Motilal Nehru National Institute of Technology, Allahabad-211004, India
| | - R P Tewari
- Department of Applied Mechanics, Motilal Nehru National Institute of Technology, Allahabad-211004, India
| | - P K Dutta
- Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India.
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61
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Melchionna M, Styan KE, Marchesan S. The Unexpected Advantages of Using D-Amino Acids for Peptide Self- Assembly into Nanostructured Hydrogels for Medicine. Curr Top Med Chem 2016; 16:2009-18. [PMID: 26876522 PMCID: PMC5374841 DOI: 10.2174/1568026616999160212120302] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 07/24/2015] [Accepted: 08/12/2015] [Indexed: 02/04/2023]
Abstract
Self-assembled peptide hydrogels have brought innovation to the medicinal field, not only as responsive biomaterials but also as nanostructured therapeutic agents or as smart drug delivery systems. D-amino acids are typically introduced to increase the peptide enzymatic stability. However, there are several reports of unexpected effects on peptide conformation, self-assembly behavior, cytotoxicity and even therapeutic activity. This mini-review discusses all the surprising twists of heterochiral self-assembled peptide hydrogels, and delineates emerging key findings to exploit all the benefits of D-amino acids in this novel medicinal area.
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Affiliation(s)
| | | | - Silvia Marchesan
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, 34127 Trieste, Italy.
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62
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Du X, Zhou J, Shi J, Xu B. Supramolecular Hydrogelators and Hydrogels: From Soft Matter to Molecular Biomaterials. Chem Rev 2015; 115:13165-307. [PMID: 26646318 PMCID: PMC4936198 DOI: 10.1021/acs.chemrev.5b00299] [Citation(s) in RCA: 1278] [Impact Index Per Article: 142.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Indexed: 12/19/2022]
Abstract
In this review we intend to provide a relatively comprehensive summary of the work of supramolecular hydrogelators after 2004 and to put emphasis particularly on the applications of supramolecular hydrogels/hydrogelators as molecular biomaterials. After a brief introduction of methods for generating supramolecular hydrogels, we discuss supramolecular hydrogelators on the basis of their categories, such as small organic molecules, coordination complexes, peptides, nucleobases, and saccharides. Following molecular design, we focus on various potential applications of supramolecular hydrogels as molecular biomaterials, classified by their applications in cell cultures, tissue engineering, cell behavior, imaging, and unique applications of hydrogelators. Particularly, we discuss the applications of supramolecular hydrogelators after they form supramolecular assemblies but prior to reaching the critical gelation concentration because this subject is less explored but may hold equally great promise for helping address fundamental questions about the mechanisms or the consequences of the self-assembly of molecules, including low molecular weight ones. Finally, we provide a perspective on supramolecular hydrogelators. We hope that this review will serve as an updated introduction and reference for researchers who are interested in exploring supramolecular hydrogelators as molecular biomaterials for addressing the societal needs at various frontiers.
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Affiliation(s)
- Xuewen Du
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Jie Zhou
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Junfeng Shi
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Bing Xu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
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63
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Rad-Malekshahi M, Lempsink L, Amidi M, Hennink WE, Mastrobattista E. Biomedical Applications of Self-Assembling Peptides. Bioconjug Chem 2015; 27:3-18. [DOI: 10.1021/acs.bioconjchem.5b00487] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mazda Rad-Malekshahi
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584
CG Utrecht, The Netherlands
| | - Ludwijn Lempsink
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584
CG Utrecht, The Netherlands
| | - Maryam Amidi
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584
CG Utrecht, The Netherlands
| | - Wim E. Hennink
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584
CG Utrecht, The Netherlands
| | - Enrico Mastrobattista
- Department of Pharmaceutics,
Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, 3584
CG Utrecht, The Netherlands
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64
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Jiang L, Xu D, Sellati TJ, Dong H. Self-assembly of cationic multidomain peptide hydrogels: supramolecular nanostructure and rheological properties dictate antimicrobial activity. NANOSCALE 2015; 7:19160-9. [PMID: 26524425 PMCID: PMC4866592 DOI: 10.1039/c5nr05233e] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Hydrogels are an important class of biomaterials that have been widely utilized for a variety of biomedical/medical applications. The biological performance of hydrogels, particularly those used as wound dressing could be greatly advanced if imbued with inherent antimicrobial activity capable of staving off colonization of the wound site by opportunistic bacterial pathogens. Possessing such antimicrobial properties would also protect the hydrogel itself from being adversely affected by microbial attachment to its surface. We have previously demonstrated the broad-spectrum antimicrobial activity of supramolecular assemblies of cationic multi-domain peptides (MDPs) in solution. Here, we extend the 1-D soluble supramolecular assembly to 3-D hydrogels to investigate the effect of the supramolecular nanostructure and its rheological properties on the antimicrobial activity of self-assembled hydrogels. Among designed MDPs, the bactericidal activity of peptide hydrogels was found to follow an opposite trend to that in solution. Improved antimicrobial activity of self-assembled peptide hydrogels is dictated by the combined effect of supramolecular surface chemistry and storage modulus of the bulk materials, rather than the ability of individual peptides/peptide assemblies to penetrate bacterial cell membrane as observed in solution. The structure-property-activity relationship developed through this study will provide important guidelines for designing biocompatible peptide hydrogels with built-in antimicrobial activity for various biomedical applications.
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Affiliation(s)
- Linhai Jiang
- Department of Chemistry & Biomolecular Science, Clarkson University, Potsdam, NY 13699, USA.
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65
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Al-Garawi ZS, Thorpe JR, Serpell LC. Silica Nanowires Templated by Amyloid-like Fibrils. ACTA ACUST UNITED AC 2015; 127:13525-13529. [PMID: 27478270 PMCID: PMC4954120 DOI: 10.1002/ange.201508415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 11/25/2022]
Abstract
Many peptides self‐assemble to form amyloid fibrils. We previously explored the sequence propensity to form amyloid using variants of a designed peptide with sequence KFFEAAAKKFFE. These variant peptides form highly stable amyloid fibrils with varied lateral assembly and are ideal to template further assembly of non‐proteinaceous material. Herein, we show that the fibrils formed by peptide variants can be coated with a layer of silica to produce silica nanowires using tetraethyl‐orthosilicate. The resulting nanowires were characterized using electron microscopy (TEM), X‐ray fiber diffraction, FTIR and cross‐section EM to reveal a nanostructure with peptidic core. Lysine residues play a role in templating the formation of silica on the fibril surface and, using this library of peptides, we have explored the contributions of lysine as well as arginine to silica templating, and find that sequence plays an important role in determining the physical nature and structure of the resulting nanowires.
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Affiliation(s)
- Zahraa S Al-Garawi
- School of Life Sciences, University of Sussex, Falmer, BN1 9QG (UK); Chemistry Department, College of Sciences, Al-Mustansyriah University (Iraq)
| | - Julian R Thorpe
- School of Life Sciences, University of Sussex, Falmer, BN1 9QG (UK)
| | - Louise C Serpell
- School of Life Sciences, University of Sussex, Falmer, BN1 9QG (UK)
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66
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Al-Garawi ZS, Thorpe JR, Serpell LC. Silica Nanowires Templated by Amyloid-like Fibrils. Angew Chem Int Ed Engl 2015; 54:13327-31. [PMID: 26434656 PMCID: PMC4674975 DOI: 10.1002/anie.201508415] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 11/11/2022]
Abstract
Many peptides self-assemble to form amyloid fibrils. We previously explored the sequence propensity to form amyloid using variants of a designed peptide with sequence KFFEAAAKKFFE. These variant peptides form highly stable amyloid fibrils with varied lateral assembly and are ideal to template further assembly of non-proteinaceous material. Herein, we show that the fibrils formed by peptide variants can be coated with a layer of silica to produce silica nanowires using tetraethyl-orthosilicate. The resulting nanowires were characterized using electron microscopy (TEM), X-ray fiber diffraction, FTIR and cross-section EM to reveal a nanostructure with peptidic core. Lysine residues play a role in templating the formation of silica on the fibril surface and, using this library of peptides, we have explored the contributions of lysine as well as arginine to silica templating, and find that sequence plays an important role in determining the physical nature and structure of the resulting nanowires.
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Affiliation(s)
- Zahraa S Al-Garawi
- School of Life Sciences, University of Sussex, Falmer, BN1 9QG (UK).,Chemistry Department, College of Sciences, Al-Mustansyriah University (Iraq)
| | - Julian R Thorpe
- School of Life Sciences, University of Sussex, Falmer, BN1 9QG (UK)
| | - Louise C Serpell
- School of Life Sciences, University of Sussex, Falmer, BN1 9QG (UK).
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67
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Nagy-Smith K, Moore E, Schneider J, Tycko R. Molecular structure of monomorphic peptide fibrils within a kinetically trapped hydrogel network. Proc Natl Acad Sci U S A 2015; 112:9816-21. [PMID: 26216960 PMCID: PMC4538636 DOI: 10.1073/pnas.1509313112] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Most, if not all, peptide- and protein-based hydrogels formed by self-assembly can be characterized as kinetically trapped 3D networks of fibrils. The propensity of disease-associated amyloid-forming peptides and proteins to assemble into polymorphic fibrils suggests that cross-β fibrils comprising hydrogels may also be polymorphic. We use solid-state NMR to determine the molecular and supramolecular structure of MAX1, a de novo designed gel-forming peptide, in its fibrillar state. We find that MAX1 adopts a β-hairpin conformation and self-assembles with high fidelity into a double-layered cross-β structure. Hairpins assemble with an in-register Syn orientation within each β-sheet layer and with an Anti orientation between layers. Surprisingly, although the MAX1 fibril network is kinetically trapped, solid-state NMR data show that fibrils within this network are monomorphic and most likely represent the thermodynamic ground state. Intermolecular interactions not available in alternative structural arrangements apparently dictate this monomorphic behavior.
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Affiliation(s)
- Katelyn Nagy-Smith
- Chemical Biology Laboratory, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD 21702; Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
| | - Eric Moore
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520
| | - Joel Schneider
- Chemical Biology Laboratory, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD 21702
| | - Robert Tycko
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520
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68
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Koetting MC, Peters JT, Steichen SD, Peppas NA. Stimulus-responsive hydrogels: Theory, modern advances, and applications. MATERIALS SCIENCE & ENGINEERING. R, REPORTS : A REVIEW JOURNAL 2015; 93:1-49. [PMID: 27134415 PMCID: PMC4847551 DOI: 10.1016/j.mser.2015.04.001] [Citation(s) in RCA: 543] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Over the past century, hydrogels have emerged as effective materials for an immense variety of applications. The unique network structure of hydrogels enables very high levels of hydrophilicity and biocompatibility, while at the same time exhibiting the soft physical properties associated with living tissue, making them ideal biomaterials. Stimulus-responsive hydrogels have been especially impactful, allowing for unprecedented levels of control over material properties in response to external cues. This enhanced control has enabled groundbreaking advances in healthcare, allowing for more effective treatment of a vast array of diseases and improved approaches for tissue engineering and wound healing. In this extensive review, we identify and discuss the multitude of response modalities that have been developed, including temperature, pH, chemical, light, electro, and shear-sensitive hydrogels. We discuss the theoretical analysis of hydrogel properties and the mechanisms used to create these responses, highlighting both the pioneering and most recent work in all of these fields. Finally, we review the many current and proposed applications of these hydrogels in medicine and industry.
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Affiliation(s)
- Michael C. Koetting
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
| | - Jonathan T. Peters
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
| | - Stephanie D. Steichen
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
| | - Nicholas A. Peppas
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, United States
- College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, United States
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX 78712, United States
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69
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Jacob RS, Ghosh D, Singh PK, Basu SK, Jha NN, Das S, Sukul PK, Patil S, Sathaye S, Kumar A, Chowdhury A, Malik S, Sen S, Maji SK. Self healing hydrogels composed of amyloid nano fibrils for cell culture and stem cell differentiation. Biomaterials 2015; 54:97-105. [DOI: 10.1016/j.biomaterials.2015.03.002] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/04/2015] [Indexed: 01/08/2023]
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70
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Kier BL, Anderson JM, Andersen NH. Disulfide-Mediated β-Strand Dimers: Hyperstable β-Sheets Lacking Tertiary Interactions and Turns. J Am Chem Soc 2015; 137:5363-71. [PMID: 25835058 PMCID: PMC7450586 DOI: 10.1021/ja5117809] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Disulfide bonds between cysteine residues are essential to the structure and folding of many proteins. Yet their role in the design of structured peptides and proteins has frequently been limited to use as intrachain covalent staples that reinforce existing structure or induce knot-like conformations. In β-hairpins, their placement at non-H-bonding positions across antiparallel strands has proven useful for achieving fully folded positive controls. Here we report a new class of designed β-sheet peptide dimers with strand-central disulfides as a key element. We have found that the mere presence of a disulfide bond near the middle of a short peptide chain is sufficient to nucleate some antiparallel β-sheet structure; addition of β-capping units and other favorable cross-strand interactions yield hyperstable sheets. Strand-central cystines were found to be superior to the best designed reversing turns in terms of nucleating β-sheet structure formation. We have explored the limitations and possibilities of this technique (the use of disulfides as sheet nucleators), and we provide a set of rules and rationales for the application and further design of disulfide-tethered "turnless" β-sheets.
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Affiliation(s)
- Brandon L Kier
- Chemistry Department, University of Washington, Seattle, Washington 98195, United States
| | - Jordan M Anderson
- Chemistry Department, University of Washington, Seattle, Washington 98195, United States
| | - Niels H Andersen
- Chemistry Department, University of Washington, Seattle, Washington 98195, United States
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71
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Rubert Pérez CM, Stephanopoulos N, Sur S, Lee SS, Newcomb C, Stupp SI. The powerful functions of peptide-based bioactive matrices for regenerative medicine. Ann Biomed Eng 2015; 43:501-14. [PMID: 25366903 PMCID: PMC4380550 DOI: 10.1007/s10439-014-1166-6] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 10/15/2014] [Indexed: 12/12/2022]
Abstract
In an effort to develop bioactive matrices for regenerative medicine, peptides have been used widely to promote interactions with cells and elicit desired behaviors in vivo. This paper describes strategies that utilize peptide-based molecules as building blocks to create supramolecular nanostructures that emulate not only the architecture but also the chemistry of the extracellular matrix in mammalian biology. After initiating a desired regenerative response in vivo, the innate biodegradability of these systems allow for the natural biological processes to take over in order to promote formation of a new tissue without leaving a trace of the nonnatural components. These bioactive matrices can either bind or mimic growth factors or other protein ligands to elicit a cellular response, promote specific mechano-biological responses, and also guide the migration of cells with programmed directionality. In vivo applications discussed in this review using peptide-based matrices include the regeneration of axons after spinal cord injury, regeneration of bone, and the formation of blood vessels in ischemic muscle as a therapy in peripheral arterial disease and cardiovascular diseases.
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Affiliation(s)
- Charles M. Rubert Pérez
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, 303 East Superior Street, 11th floor, Chicago, IL 60611, USA
| | - Nicholas Stephanopoulos
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, 303 East Superior Street, 11th floor, Chicago, IL 60611, USA
| | - Shantanu Sur
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, 303 East Superior Street, 11th floor, Chicago, IL 60611, USA
- Department of Biology, Clarkson University, 8 Clarkson Avenue, Potsdam, NY 13699, USA
| | - Sungsoo S. Lee
- Department of Materials and Science & Engineering, Chemistry, Medicine, and Biomedical Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
| | - Christina Newcomb
- Department of Materials and Science & Engineering, Chemistry, Medicine, and Biomedical Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
| | - Samuel I. Stupp
- Simpson Querrey Institute of BioNanotechnology, Northwestern University, 303 East Superior Street, 11th floor, Chicago, IL 60611, USA
- Department of Materials and Science & Engineering, Chemistry, Medicine, and Biomedical Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
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72
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Miller Y, Ma B, Nussinov R. Polymorphism in self-assembly of peptide-based β-hairpin contributes to network morphology and hydrogel mechanical rigidity. J Phys Chem B 2015; 119:482-90. [PMID: 25545881 PMCID: PMC4298354 DOI: 10.1021/jp511485n] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 12/24/2014] [Indexed: 12/18/2022]
Abstract
Hydrogels are proving to be an excellent class of materials for biomedical applications. The molecular self-assembly of designed MAX1 β-hairpin peptides into fibrillar networks has emerged as a novel route to form responsive hydrogels. Herein, computational modeling techniques are used to investigate the relative arrangements of individual hairpins within the fibrils that constitute the gel. The modeling provides insight into the morphology of the fibril network, which defines the gel's mechanical properties. Our study suggests polymorphic arrangements of the hairpins within the fibrils; however, the relative populations and the relative conformational energies of the polymorphic arrangements show a preference toward an arrangement of hairpins where their turn regions are not capable of forming intermolecular interaction. Repulsive intramolecular electrostatic interactions appear to dictate the formation of fibrils with shorter, rather than longer, persistent lengths. These repulsive intramolecular interactions also disfavor the formation of fibril entanglements. Taken together, the modeling predicts that MAX1 forms a network containing a large number of branch points, a network morphology supported by the formation of short fibril segments. We posit that, under static conditions, the preferred branched structures of the MAX1 peptide assembly result in a cross-linked hydrogel organization. At the same time, the shear stress leads to short fibrillar structures, thus fluidic hydrogel states.
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Affiliation(s)
- Yifat Miller
- Department
of Chemistry and Ilse Katz Institute for Nanoscale Science
and Technology, Ben-Gurion University of
the Negev, Beér-Sheva 84105, Israel
| | - Buyong Ma
- Basic
Science Program, Leidos Biomedical Research, Inc. Cancer and Inflammation
Program, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Ruth Nussinov
- Basic
Science Program, Leidos Biomedical Research, Inc. Cancer and Inflammation
Program, National Cancer Institute, Frederick, Maryland 21702, United States
- Sackler
Institute of Molecular Medicine, Department of Human Genetics and
Molecular Medicine, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
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73
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Shi J, Du X, Huang Y, Zhou J, Yuan D, Wu D, Zhang Y, Haburcak R, Epstein IR, Xu B. Ligand-receptor interaction catalyzes the aggregation of small molecules to induce cell necroptosis. J Am Chem Soc 2014; 137:26-9. [PMID: 25522243 PMCID: PMC4295010 DOI: 10.1021/ja5100417] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Because
they exhibit important biological functions, from unfolding proteins
to activating enzymes to controlling cell fates, aggregates of small
molecules are able to serve as functional molecular entities in cellular
environments. However, the inability to precisely control their production
has hampered the understanding and exploration of their biological
functions. Here we show that the well-established ligand–receptor
interaction between vancomycin and d-Ala-d-Ala catalyzes
the aggregation of a d-Ala-d-Ala-containing small
peptide derivative in water. The resulting aggregates largely adhere
to the cell surface to induce cell necroptosis. Mutation of d-Ala-d-Ala to l-Ala-l-Ala or removal of
the aromatic group in the derivative results in innocuous compounds,
confirming that the aromatic–aromatic and ligand–receptor
interactions are responsible for the formation and corresponding cytotoxicity
of the aggregates. In addition to being the first example of ligand–receptor
interaction-catalyzed aggregation of small molecules on the surface
of mammalian cells, this work provides useful insights for understanding
the cytotoxicity of molecular aggregates of small molecules.
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Affiliation(s)
- Junfeng Shi
- Department of Chemistry, Brandeis University , 415 South Street, MS 015, Waltham, Massachusetts 02453, United States
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74
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McCloskey AP, Gilmore BF, Laverty G. Evolution of antimicrobial peptides to self-assembled peptides for biomaterial applications. Pathogens 2014; 3:791-821. [PMID: 25436505 PMCID: PMC4282886 DOI: 10.3390/pathogens3040791] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/17/2014] [Accepted: 09/25/2014] [Indexed: 11/17/2022] Open
Abstract
Biomaterial-related infections are a persistent burden on patient health, recovery, mortality and healthcare budgets. Self-assembled antimicrobial peptides have evolved from the area of antimicrobial peptides. Peptides serve as important weapons in nature, and increasingly medicine, for combating microbial infection and biofilms. Self-assembled peptides harness a "bottom-up" approach, whereby the primary peptide sequence may be modified with natural and unnatural amino acids to produce an inherently antimicrobial hydrogel. Gelation may be tailored to occur in the presence of physiological and infective indicators (e.g. pH, enzymes) and therefore allow local, targeted antimicrobial therapy at the site of infection. Peptides demonstrate inherent biocompatibility, antimicrobial activity, biodegradability and numerous functional groups. They are therefore prime candidates for the production of polymeric molecules that have the potential to be conjugated to biomaterials with precision. Non-native chemistries and functional groups are easily incorporated into the peptide backbone allowing peptide hydrogels to be tailored to specific functional requirements. This article reviews an area of increasing interest, namely self-assembled peptides and their potential therapeutic applications as innovative hydrogels and biomaterials in the prevention of biofilm-related infection.
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Affiliation(s)
- Alice P McCloskey
- Biomaterials, Biofilm and Infection Control Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, N. Ireland.
| | - Brendan F Gilmore
- Biomaterials, Biofilm and Infection Control Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, N. Ireland.
| | - Garry Laverty
- Biomaterials, Biofilm and Infection Control Research Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast BT9 7BL, N. Ireland.
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75
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Sathaye S, Mbi A, Sonmez C, Chen Y, Blair DL, Schneider JP, Pochan DJ. Rheology of peptide- and protein-based physical hydrogels: Are everyday measurements just scratching the surface? WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2014; 7:34-68. [DOI: 10.1002/wnan.1299] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 07/11/2014] [Accepted: 08/07/2014] [Indexed: 01/30/2023]
Affiliation(s)
- Sameer Sathaye
- Department of Materials Science and Engineering and Delaware Biotechnology Institute; University of Delaware; Newark DE USA
| | - Armstrong Mbi
- Department of Physics; Georgetown University; Washington DC USA
| | - Cem Sonmez
- Department of Chemistry; University of Delaware; Newark DE USA
- Chemical Biology Laboratory; National Cancer Institute, Frederick National Laboratory for Cancer Research; Frederick MD USA
| | - Yingchao Chen
- Department of Materials Science and Engineering and Delaware Biotechnology Institute; University of Delaware; Newark DE USA
| | - Daniel L. Blair
- Department of Physics; Georgetown University; Washington DC USA
| | - Joel P. Schneider
- Chemical Biology Laboratory; National Cancer Institute, Frederick National Laboratory for Cancer Research; Frederick MD USA
| | - Darrin J. Pochan
- Department of Materials Science and Engineering and Delaware Biotechnology Institute; University of Delaware; Newark DE USA
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76
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Chen C, Gu Y, Deng L, Han S, Sun X, Chen Y, Lu JR, Xu H. Tuning gelation kinetics and mechanical rigidity of β-hairpin peptide hydrogels via hydrophobic amino acid substitutions. ACS APPLIED MATERIALS & INTERFACES 2014; 6:14360-14368. [PMID: 25087842 DOI: 10.1021/am5036303] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Self-assembling peptide hydrogels with faster gelation kinetics and higher mechanical rigidity are favorable for their practical applications. A design strategy to control the folding, self-assembly, and hydrogelation of β-hairpin peptides via hydrophobic amino acid substitutions has been explored in this study. Isoleucine has higher hydrophobicity and stronger propensity for β-sheet hydrogen bonding than valine. After the valine residues of MAX1 (VKVKVKVKV(D)PPTKVKVKVKV-NH2) were replaced with isoleucines, oscillatory rheometry and circular dichroism (CD) spectroscopy characterizations indicated that the variants had clearly faster self-assembly and hydrogelation rates and that the resulting gels displayed higher mechanical stiffness. Transmission electron microscopy (TEM) indicated the parent MAX1 and its variants all formed networks of long and entangled fibrils with the similar diameters of ∼3 nm, suggesting little effect of hydrophobic substitutions on the self-assembled morphology. The MAX1I8 (IKIKIKIKV(D)PPTKIKIKIKI-NH2) hydrogel showed the fastest gelation rate (within 5 min) and the highest gel rigidity with the series, supporting the homogeneous cell distribution within its 3D scaffold. In addition, the MAX1I8 hydrogel showed quick shear-thinning and rapid recovery upon cessation of shear strain, and the MTT and immunological assays indicated its low cytotoxicity and good biocompatibility. These features are highly attractive for its widespread use in 3D cell culturing and regenerative medical treatments.
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Affiliation(s)
- Cuixia Chen
- State Key Laboratory of Heavy Oil Processing and the Centre for Bioengineering and Biotechnology, China University of Petroleum (East China) , 66 Changjiang West Road, Qingdao, Shandong 266580, China
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77
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Liu L, Liu X, Deng H, Wu Z, Zhang J, Cen B, Xu Q, Ji A. Something between the amazing functions and various morphologies of self-assembling peptides materials in the medical field. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1331-45. [DOI: 10.1080/09205063.2014.943536] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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78
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Castillo Diaz LA, Saiani A, Gough JE, Miller AF. Human osteoblasts within soft peptide hydrogels promote mineralisation in vitro. J Tissue Eng 2014; 5:2041731414539344. [PMID: 25383164 PMCID: PMC4221980 DOI: 10.1177/2041731414539344] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 05/02/2014] [Indexed: 12/05/2022] Open
Abstract
Biomaterials that provide three-dimensional support networks for the culture of cells are being developed for a wide range of tissue engineering applications including the regeneration of bone. This study explores the potential of the versatile ionic-complementary peptide, FEFEFKFK, for such a purpose as this peptide spontaneously self-assembles into β-sheet-rich fibres that subsequently self-associate to form self-supporting hydrogels. Via simple live/dead cell assays, we demonstrated that 3 wt% hydrogels were optimal for the support of osteoblast cells. We went on to show that these cells are not only viable within the three-dimensional hydrogel but they also proliferate and produce osteogenic key proteins, that is, they behave like in vivo bone cells, over the 14-day period explored here. The gel elasticity increased over time when cells were present – in comparison to a decrease in control samples – indicating the deposition of matrix throughout the peptide scaffold. Moreover, significant quantities of calcium phosphate were deposited. Collectively, these data demonstrate that ionic-complementary octapeptides offer a suitable three-dimensional environment for osteoblastic cell function.
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Affiliation(s)
- Luis A Castillo Diaz
- School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, UK ; Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
| | - Alberto Saiani
- Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK ; School of Materials, The University of Manchester, Manchester, UK
| | - Julie E Gough
- School of Materials, The University of Manchester, Manchester, UK
| | - Aline F Miller
- School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, UK ; Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK
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79
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Liu GF, Zhang D, Feng CL. Control of Three-Dimensional Cell Adhesion by the Chirality of Nanofibers in Hydrogels. Angew Chem Int Ed Engl 2014; 53:7789-93. [DOI: 10.1002/anie.201403249] [Citation(s) in RCA: 169] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 12/21/2022]
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80
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Liu GF, Zhang D, Feng CL. Control of Three-Dimensional Cell Adhesion by the Chirality of Nanofibers in Hydrogels. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403249] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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81
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Du X, Zhou J, Xu B. Supramolecular hydrogels made of basic biological building blocks. Chem Asian J 2014; 9:1446-72. [PMID: 24623474 PMCID: PMC4024374 DOI: 10.1002/asia.201301693] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Indexed: 12/31/2022]
Abstract
As a consequence of the self-assembly of small organic molecules in water, supramolecular hydrogels are evolving from serendipitous events during organic synthesis to become a new type of materials that hold promise for applications in biomedicine. In this Focus Review, we describe recent advances in the use of basic biological building blocks for creating molecules that act as hydrogelators and the potential applications of the corresponding hydrogels. After introducing the concept of supramolecular hydrogels and defining the scope of this review, we briefly describe the methods for making and characterizing supramolecular hydrogels. We then discuss representative hydrogelators according to the categories of their building blocks, such as amino acids, nucleobases, and saccharides, and highlight the applications of the hydrogels when necessary. Finally, we offer our perspective and outlook on this fast-growing field at the interface of organic chemistry, materials, biology, and medicine. By providing a snapshot for chemists, engineers, and medical scientists, we hope that this Focus Review will contribute to the development of multidisciplinary research on supramolecular hydrogels for a wide range of applications in different fields.
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Affiliation(s)
- Xuewen Du
- Department of Chemistry, Brandeis University, 415 South St., Waltham, MA 02454, USA, Fax: (01)781 736 2516
| | - Jie Zhou
- Department of Chemistry, Brandeis University, 415 South St., Waltham, MA 02454, USA, Fax: (01)781 736 2516
| | - Bing Xu
- Department of Chemistry, Brandeis University, 415 South St., Waltham, MA 02454, USA, Fax: (01)781 736 2516
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82
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Marshall KE, Marchante R, Xue WF, Serpell LC. The relationship between amyloid structure and cytotoxicity. Prion 2014; 8:28860. [PMID: 24819071 PMCID: PMC4189889 DOI: 10.4161/pri.28860] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Self-assembly of proteins and peptides into amyloid structures has been the subject of intense and focused research due to their association with neurodegenerative, age-related human diseases and transmissible prion diseases in humans and mammals. Of the disease associated amyloid assemblies, a diverse array of species, ranging from small oligomeric assembly intermediates to fibrillar structures, have been shown to have toxic potential. Equally, a range of species formed by the same disease associated amyloid sequences have been found to be relatively benign under comparable monomer equivalent concentrations and conditions. In recent years, an increasing number of functional amyloid systems have also been found. These developments show that not all amyloid structures are generically toxic to cells. Given these observations, it is important to understand why amyloid structures may encode such varied toxic potential despite sharing a common core molecular architecture. Here, we discuss possible links between different aspects of amyloidogenic structures and assembly mechanisms with their varied functional effects. We propose testable hypotheses for the relationship between amyloid structure and its toxic potential in the context of recent reports on amyloid sequence, structure, and toxicity relationships.
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Affiliation(s)
- Karen E Marshall
- School of Life Sciences; University of Sussex; Falmer, East Sussex UK; School of Biological Sciences; University of Kent; Canterbury, Kent UK
| | - Ricardo Marchante
- School of Life Sciences; University of Sussex; Falmer, East Sussex UK; School of Biological Sciences; University of Kent; Canterbury, Kent UK
| | - Wei-Feng Xue
- School of Life Sciences; University of Sussex; Falmer, East Sussex UK; School of Biological Sciences; University of Kent; Canterbury, Kent UK
| | - Louise C Serpell
- School of Life Sciences; University of Sussex; Falmer, East Sussex UK; School of Biological Sciences; University of Kent; Canterbury, Kent UK
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83
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Fleming S, Debnath S, Frederix PWJM, Hunt NT, Ulijn RV. Insights into the coassembly of hydrogelators and surfactants based on aromatic peptide amphiphiles. Biomacromolecules 2014; 15:1171-84. [PMID: 24568678 DOI: 10.1021/bm401720z] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The coassembly of small molecules is a useful means of increasing the complexity and functionality of their resultant supramolecular constructs in a modular fashion. In this study, we explore the assembly and coassembly of serine surfactants and tyrosine-leucine hydrogelators, capped at the N-termini with either fluorenyl-9-methoxycarbonyl (Fmoc) or pyrene. These systems all exhibit self-assembly behavior, which is influenced by aromatic stacking interactions, while the hydrogelators also exhibit β-sheet-type arrangements, which reinforce their supramolecular structures. We provide evidence for three distinct supramolecular coassembly models; cooperative, disruptive, and orthogonal. The coassembly mode adopted depends on whether the individual constituents (I) are sufficiently different, such that effective segregation and orthogonal assembly occurs; (II) adhere to a communal mode of self-assembly; or (III) act to compromise the assembly of one another via incorporation and disruption. We find that a greater scope for controllable coassembly exists within orthogonal systems; which show minimal relative changes in the native gelator's supramolecular structure by Fourier transform infrared spectroscopy (FTIR), circular dichroism (CD), and fluorescence spectroscopy. This is indicative of the segregation of orthogonal coassembly constituents into distinct domains, where surfactant chemical functionality is presented at the surface of the gelator's supramolecular fibers. Overall, this work provides new insights into the design of modular coassembly systems, which have the potential to augment the chemical and physical properties of existing gelator systems.
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Affiliation(s)
- Scott Fleming
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
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84
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Siriwardane ML, DeRosa K, Collins G, Pfister BJ. Controlled formation of cross-linked collagen fibers for neural tissue engineering applications. Biofabrication 2014; 6:015012. [PMID: 24589999 DOI: 10.1088/1758-5082/6/1/015012] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Fibrous scaffolds engineered to direct the growth of tissues can be important in forming architecturally functional tissue such as aligning regenerating nerves with their target. Collagen is a commonly used substrate used for neuronal growth applications in the form of surface coatings and hydrogels. The wet spinning technique can create collagen fibers without the use of organic solvents and is typically accomplished by extruding a collagen dispersion into a coagulation bath. To create well-controlled and uniform collagen fibers, we developed an automatic wet spinning device with precise control over the spinning and fiber collection parameters. A fiber collection belt allowed the continuous formation of very soft and delicate fibers up to half a meter in length. Wet-spun collagen fibers were characterized by tensile and thermal behavior, diameter uniformity, the swelling response in phosphate buffered saline and their biocompatibility with dorsal root ganglion (DRG) neurons and Schwann cells. Fibers formed from 0.75% weight by volume (w/v) collagen dispersions formed the best fibers in terms of tensile behavior and fiber uniformity. Fibers post-treated with the cross-linkers glutaraldehyde and genipin exhibited increased mechanical stability and reduced swelling. Importantly, genipin-treated fibers were conducive to DRG neurons and Schwann cell survival and growth, which validated the use of this cross-linker for neural tissue engineering applications.
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Affiliation(s)
- Mevan L Siriwardane
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, USA. Graduate School of Biomedical Sciences, University of Medicine and Dentistry of New Jersey, Newark, NJ, USA
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85
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Ramakers BEI, van Hest JCM, Löwik DWPM. Molecular tools for the construction of peptide-based materials. Chem Soc Rev 2014; 43:2743-56. [PMID: 24448606 DOI: 10.1039/c3cs60362h] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Proteins and peptides are fundamental components of living systems where they play crucial roles at both functional and structural level. The versatile biological properties of these molecules make them interesting building blocks for the construction of bio-active and biocompatible materials. A variety of molecular tools can be used to fashion the peptides necessary for the assembly of these materials. In this tutorial review we shall describe five of the main techniques, namely solid phase peptide synthesis, native chemical ligation, Staudinger ligation, NCA polymerisation, and genetic engineering, that have been used to great effect for the construction of a host of peptide-based materials.
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Affiliation(s)
- B E I Ramakers
- Radboud University Nijmegen, Institute for Molecules and Materials, Bio-Organic Chemistry, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
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86
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Kim I, Jeong HH, Kim YJ, Lee NE, Huh KM, Lee CS, Kim GH, Lee E. A “Light-up” 1D supramolecular nanoprobe for silver ions based on assembly of pyrene-labeled peptide amphiphiles: cell-imaging and antimicrobial activity. J Mater Chem B 2014; 2:6478-6486. [DOI: 10.1039/c4tb00892h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The histidine-coated fibrils response to Ag+ with fluorescence enhancement was developed through a rational design based on the aqueous self-assembly of peptides for potential use as cell-imaging and antimicrobial agents.
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Affiliation(s)
- Inhye Kim
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 305-764, Republic of Korea
| | - Heon-Ho Jeong
- Department of Chemical Engineering
- Chungnam National University
- Daejeon 305-764, Republic of Korea
| | - Yong-Jae Kim
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 305-764, Republic of Korea
| | - Na-Eun Lee
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 305-764, Republic of Korea
| | - Kang-moo Huh
- Department of Polymer Engineering
- Chungnam National University
- Daejeon 305-764, Republic of Korea
| | - Chang-Soo Lee
- Department of Chemical Engineering
- Chungnam National University
- Daejeon 305-764, Republic of Korea
| | - Geon Hee Kim
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 305-764, Republic of Korea
- Center for Analytical Instrumentation Development
- Korea Basic Science Institute
| | - Eunji Lee
- Graduate School of Analytical Science and Technology
- Chungnam National University
- Daejeon 305-764, Republic of Korea
- Center for Analytical Instrumentation Development
- Korea Basic Science Institute
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87
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Panda JJ, Chauhan VS. Short peptide based self-assembled nanostructures: implications in drug delivery and tissue engineering. Polym Chem 2014. [DOI: 10.1039/c4py00173g] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Self-assembling peptides with many potential biomedical applications.
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Affiliation(s)
- Jiban Jyoti Panda
- International Centre for Genetic Engineering and Biotechnology
- New Delhi 110067, India
- Institute of Nano Science and Technology
- Mohali, India
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88
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Raeburn J, Zamith Cardoso A, Adams DJ. The importance of the self-assembly process to control mechanical properties of low molecular weight hydrogels. Chem Soc Rev 2013; 42:5143-56. [PMID: 23571407 DOI: 10.1039/c3cs60030k] [Citation(s) in RCA: 397] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hydrogels can be formed by the self-assembly of certain small molecules in water. Self-assembly occurs via non-covalent interactions. The self-assembly leads to the formation of fibrous structures which form the matrix of the gel. The mechanical properties of the gels arise from the properties of the fibres themselves (thickness, persistence length etc.), the number and type of cross-links and also how the fibres are distributed in space (the microstructure). We discuss here the effect of assembling the molecules under different conditions, i.e. the self-assembly process. There is sufficient literature showing that how the molecules are assembled can have a significant effect on the properties of the resulting gels.
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Affiliation(s)
- Jaclyn Raeburn
- University of Liverpool - Department of Chemistry, Crown Street, Liverpool L69 7ZD, UK
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89
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Liu DE, Kotsmar C, Nguyen F, Sells T, Taylor NO, Prausnitz JM, Radke CJ. Macromolecule Sorption and Diffusion in HEMA/MAA Hydrogels. Ind Eng Chem Res 2013. [DOI: 10.1021/ie402148u] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. E. Liu
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
| | - C. Kotsmar
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
| | - F. Nguyen
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
| | - T. Sells
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
| | - N. O. Taylor
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
| | - J. M. Prausnitz
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
| | - C. J. Radke
- Department
of Chemical and Biomolecular Engineering and ‡Vision Science Group, University of California, Berkeley, Berkeley, California, 94720-1462, United States
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90
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Zarzhitsky S, Edri H, Azoulay Z, Cohen I, Ventura Y, Gitelman A, Rapaport H. The effect of pH and calcium ions on the stability of amphiphilic and anionicβ-sheet peptide hydrogels. Biopolymers 2013; 100:760-72. [DOI: 10.1002/bip.22282] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 03/20/2013] [Accepted: 04/08/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Shlomo Zarzhitsky
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
- Ilse Katz Institute for Nano-Science and Technology (IKI); Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Hodaya Edri
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Ziv Azoulay
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Ifat Cohen
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Yvonne Ventura
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Anna Gitelman
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
| | - Hanna Rapaport
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
- Ilse Katz Institute for Nano-Science and Technology (IKI); Ben-Gurion University of the Negev; Beer-Sheva 84105 Israel
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91
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Hyland LL, Taraban MB, Yu YB. Using Small-Angle Scattering Techniques to Understand Mechanical Properties of Biopolymer-Based Biomaterials. SOFT MATTER 2013; 9:10.1039/C3SM51209F. [PMID: 24273590 PMCID: PMC3835338 DOI: 10.1039/c3sm51209f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The design and engineering of innovative biopolymer-based biomaterials for a variety of biomedical applications should be based on the understanding of the relationship between their nanoscale structure and mechanical properties. Down the road, such understanding could be fundamental to tune the properties of engineered tissues, extracellular matrices for cell delivery and proliferation/differentiation, etc. In this tutorial review, we attempt to show in what way biomaterial structural data can help to understand the bulk material properties. We begin with some background on common types of biopolymers used in biomaterials research, discuss some typical mechanical testing techniques and then review how others in the field of biomaterials have utilized small-angle scattering for material characterization. Detailed examples are then used to show the full range of possible characterization techniques available for biopolymer-based biomaterials. Future developments in the area of material characterization by small-angle scattering will undoubtedly facilitate the use of structural data to control the kinetics of assembly and final properties of prospective biomaterials.
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Affiliation(s)
| | - Marc B. Taraban
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA. Fax: 301-315-9953; Tel: 301-405-2829
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD, USA. Fax: 410-706-5017; Tel: 410-706-7514
| | - Y. Bruce Yu
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD, USA. Fax: 410-706-5017; Tel: 410-706-7514
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92
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Rao KM, Rao KSVK, Ramanjaneyulu G, Rao KC, Subha MCS, Ha CS. Biodegradable sodium alginate-based semi-interpenetrating polymer network hydrogels for antibacterial application. J Biomed Mater Res A 2013; 102:3196-206. [PMID: 24151188 DOI: 10.1002/jbm.a.34991] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 10/02/2013] [Accepted: 10/08/2013] [Indexed: 11/09/2022]
Abstract
A series of biodegradable, semi-interpenetrating polymer network (semi-IPN) hydrogels were synthesized from a combination of carbohydrate polymer and sodium alginate (NaAlg) with acrylamide and dimethyl aminoethyl methacrylate, and crosslinked with N,N-methylenebisacrylamide via radical redox polymerization. The cytocompatibility of the hydrogels with respect to their monomers and semi-IPN hydrogels was evaluated in vitro using cultures of mouse fibroblast cell lines. This study allowed the entrapment of silver nanoparticles (NPs) into semi-IPN hydrogel networks by the in situ reduction of Ag(+) ions using NaBH4 as a reducing agent. UV-visible spectroscopy confirmed the formation of silver NPs in the semi-IPN hydrogel matrix. The formation of silver NPs was also confirmed from a themogravimetric analysis weight loss difference between hydrogel and silver nanocomposite as 32%. The morphology and structure of the AgNPs present in the hydrogel networks were examined by scanning electron microscopy. Transmission electron microscopy revealed silver NPs with a size of ∼5 nm. The silver nanocomposite hydrogel exhibited good antibacterial activity against both gram positive (Staphylococcus aureus) and gram negative (Escherichia coli) bacteria. These results suggest that the hydrogel can be applied as wound dressings and for water purification purposes.
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Affiliation(s)
- K Madhusudana Rao
- Department of Chemistry, Sri Krishnadevaraya University, Anantapur, 515 003, India; Department of Polymer Science and Engineering, Pusan National University, Busan, 609-735, Korea
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93
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Maude S, Ingham E, Aggeli A. Biomimetic self-assembling peptides as scaffolds for soft tissue engineering. Nanomedicine (Lond) 2013; 8:823-47. [DOI: 10.2217/nnm.13.65] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Tissue engineered therapies are emerging as solutions to several of the medical challenges facing aging societies. To this end, a fundamental research goal is the development of novel biocompatible materials and scaffolds. Self-assembling peptides are materials that have undergone rapid development in the last two decades and they hold promise in meeting some of these challenges. Using amino acids as building blocks enables a great versatility to be incorporated into the structures that peptides form, their physical properties and their interactions with biological systems. This review discusses several classes of short self-assembling sequences, explaining the principles that drive their self-assembly into structures with nanoscale ordering, and highlighting in vitro and in vivo studies that demonstrate the potential of these materials as novel soft tissue engineering scaffolds.
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Affiliation(s)
- Steven Maude
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | - Eileen Ingham
- The Institute of Medical & Biological Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Amalia Aggeli
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK.
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94
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Stephanopoulos N, Ortony JH, Stupp SI. Self-Assembly for the Synthesis of Functional Biomaterials. ACTA MATERIALIA 2013; 61:912-930. [PMID: 23457423 PMCID: PMC3580867 DOI: 10.1016/j.actamat.2012.10.046] [Citation(s) in RCA: 153] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
The use of self-assembly for the construction of functional biomaterials is a highly promising and exciting area of research, with great potential for the treatment of injury or disease. By using multiple noncovalent interactions, coded into the molecular design of the constituent components, self-assembly allows for the construction of complex, adaptable, and highly tunable materials with potent biological effects. This review describes some of the seminal advances in the use of self-assembly to make novel systems for regenerative medicine and biology. Materials based on peptides, proteins, DNA, or hybrids thereof have found application in the treatment of a wide range of injuries and diseases, and this review outlines the design principles and practical applications of these systems. Most of the examples covered focus on the synthesis of hydrogels for the scaffolding or transplantation of cells, with an emphasis on the biological, mechanical, and structural properties of the resulting materials. In addition, we will discuss the distinct advantages conferred by self-assembly (compared with traditional covalent materials), and present some of the challenges and opportunities for the next generation of self-assembled biomaterials.
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Affiliation(s)
- Nicholas Stephanopoulos
- Institute for BioNanotechnology in Medicine, Feinberg School of Medicine, Northwestern University, 303 E. Superior St., Suite 11-131, Chicago, IL 60611, USA
| | - Julia H. Ortony
- Institute for BioNanotechnology in Medicine, Feinberg School of Medicine, Northwestern University, 303 E. Superior St., Suite 11-131, Chicago, IL 60611, USA
| | - Samuel I. Stupp
- Institute for BioNanotechnology in Medicine, Feinberg School of Medicine, Northwestern University, 303 E. Superior St., Suite 11-131, Chicago, IL 60611, USA
- Department of Chemistry, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
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95
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Yazici H, Fong H, Wilson B, Oren E, Amos F, Zhang H, Evans J, Snead M, Sarikaya M, Tamerler C. Biological response on a titanium implant-grade surface functionalized with modular peptides. Acta Biomater 2013; 9:5341-52. [PMID: 23159566 DOI: 10.1016/j.actbio.2012.11.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 10/18/2012] [Accepted: 11/02/2012] [Indexed: 12/21/2022]
Abstract
Titanium (Ti) and its alloys are among the most successful implantable materials for dental and orthopedic applications. The combination of excellent mechanical and corrosion resistance properties makes them highly desirable as endosseous implants that can withstand a demanding biomechanical environment. Yet, the success of the implant depends on its osteointegration, which is modulated by the biological reactions occurring at the interface of the implant. A recent development for improving biological responses on the Ti-implant surface has been the realization that bifunctional peptides can impart material binding specificity not only because of their molecular recognition of the inorganic material surface, but also through their self-assembly and ease of biological conjugation properties. To assess peptide-based functionalization on bioactivity, the present authors generated a set of peptides for implant-grade Ti, using cell surface display methods. Out of 60 unique peptides selected by this method, two of the strongest titanium binding peptides, TiBP1 and TiBP2, were further characterized for molecular structure and adsorption properties. These two peptides demonstrated unique, but similar molecular conformations different from that of a weak binder peptide, TiBP60. Adsorption measurements on a Ti surface revealed that their disassociation constants were 15-fold less than TiBP60. Their flexible and modular use in biological surface functionalization were demonstrated by conjugating them with an integrin recognizing peptide motif, RGDS. The functionalization of the Ti surface by the selected peptides significantly enhanced the bioactivity of osteoblast and fibroblast cells on implant-grade materials.
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96
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Tsutsumi H, Mihara H. Soft materials based on designed self-assembling peptides: from design to application. MOLECULAR BIOSYSTEMS 2013; 9:609-17. [DOI: 10.1039/c3mb25442a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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97
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Self-assembled octapeptide scaffolds for in vitro chondrocyte culture. Acta Biomater 2013; 9:4609-17. [PMID: 22963851 DOI: 10.1016/j.actbio.2012.08.044] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 08/01/2012] [Accepted: 08/28/2012] [Indexed: 12/24/2022]
Abstract
Nature has evolved a variety of creative approaches to many aspects of materials synthesis and microstructural control. Molecular self-assembly is a simple and efficient way to fabricate complex nanostructures such as hydrogels. We have recently investigated the gelation properties of a series of ionic-complementary peptides based on the alternation of non-polar hydrophobic and polar hydrophilic residues. In this work we focus on one specific octapeptide, FEFEFKFK (F, phenylalanine; E, glutamic acid; K, lysine). This peptide was shown to self-assemble in solution and form β-sheet-rich nanofibres which, above a critical gelation concentration, entangle to form a self-supporting hydrogel. The fibre morphology of the hydrogel was analysed using transmission electron microscopy and cryo-scanning electron microscopy illustrating a dense fibrillar network of nanometer size fibres. Oscillatory rheology results show that the hydrogel possesses visco-elastic properties. Bovine chondrocytes were used to assess the biocompatibility of the scaffolds over 21 days under two-dimensional (2-D) and three-dimensional (3-D) cell culture conditions, particularly looking at cell morphology, proliferation and matrix deposition. 2-D culture resulted in cell viability and collagen type I deposition. In 3-D culture the mechanically stable gel was shown to support the viability of cells, the retention of cell morphology and collagen type II deposition. Subsequently the scaffold may serve as a template for cartilage tissue engineering.
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98
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99
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Cao C, Cao M, Fan H, Xia D, Xu H, Lu JR. Redox modulated hydrogelation of a self-assembling short peptide amphiphile. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s11434-012-5487-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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100
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Banerjee S, Sen K, Pal TK, Guha SK. Poly(styrene-co-maleic acid)-based pH-sensitive liposomes mediate cytosolic delivery of drugs for enhanced cancer chemotherapy. Int J Pharm 2012; 436:786-97. [PMID: 22884831 DOI: 10.1016/j.ijpharm.2012.07.059] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 07/17/2012] [Accepted: 07/26/2012] [Indexed: 01/22/2023]
Abstract
pH-responsive polymers render liposomes pH-sensitive and facilitate the intracellular release of encapsulated payload by fusing with endovascular membranes under mildly acidic conditions found inside cellular endosomes. The present study reports the use of high-molecular weight poly(styrene-co-maleic acid) (SMA), which exhibits conformational transition from a charged extended structure to an uncharged globule below its pK(1) value, to confer pH-sensitive property to liposomes. The changes in the co-polymer chain conformation resulted in destabilization of the liposomes at mildly acidic pH due to vesicle fusion and/or channel formation within the membrane bilayer, and ultimately led to the release of the encapsulated cargo. The vesicles preserved their pH-sensitivity and stability in serum unlike other polymer-based liposomes and exhibited no hemolytic activity at physiological pH. The lysis of RBCs at endosomal pH due to SMA-based liposome-induced alterations in the bilayer organization leading to spherocyte formation indicated the potential of these vesicles to mediate cytosolic delivery of bio-active molecules through endosome destabilization. The SMA-loaded liposomes exhibiting excellent cytocompatibility, efficiently delivered chemotherapeutic agent 5-Fluorouracil (5-FU) within colon cancer cells HT-29 in comparison to neat liposomes. This caused increased cellular-availability of the drug, which resulted in enhanced apoptosis and highlighted the clinical potential of SMA-based vesicles.
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Affiliation(s)
- Shubhadeep Banerjee
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur 721302, India
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