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Gao N, Bai P, Fang C, Wu W, Bi C, Wang J, Shan A. Biomimetic Peptide Nanonets: Exploiting Bacterial Entrapment and Macrophage Rerousing for Combatting Infections. ACS NANO 2024; 18:25446-25464. [PMID: 39240217 DOI: 10.1021/acsnano.4c03669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
The alarming rise in global antimicrobial resistance underscores the urgent need for effective antibacterial drugs. Drawing inspiration from the bacterial-entrapment mechanism of human defensin 6, we have fabricated biomimetic peptide nanonets composed of multiple functional fragments for bacterial eradication. These biomimetic peptide nanonets are designed to address antimicrobial resistance challenges through a dual-approach strategy. First, the resulting nanofibrous networks trap bacteria and subsequently kill them by loosening the membrane structure, dissipating proton motive force, and causing multiple metabolic perturbations. Second, these trapped bacterial clusters reactivate macrophages to scavenge bacteria through enhanced chemotaxis and phagocytosis via the PI3K-AKT signaling pathway and ECM-receptor interaction. In vivo results have proven that treatment with biomimetic peptide nanonets can alleviate systemic bacterial infections without causing noticeable systemic toxicity. As anticipated, the proposed strategy can address stubborn infections by entrapping bacteria and awakening antibacterial immune responses. This approach might serve as a guide for the design of bioinspired materials for future clinical applications.
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Affiliation(s)
- Nan Gao
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
| | - Pengfei Bai
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
| | - Chunyang Fang
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
| | - Wanpeng Wu
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
| | - Chongpeng Bi
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
| | - Jiajun Wang
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
| | - Anshan Shan
- College of animal science and technology, Northeast Agricultural University, Harbin 150030, China
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2
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Buzzaccaro S, Ruzzi V, Gelain F, Piazza R. A Light Scattering Investigation of Enzymatic Gelation in Self-Assembling Peptides. Gels 2023; 9:gels9040347. [PMID: 37102959 PMCID: PMC10137429 DOI: 10.3390/gels9040347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/08/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023] Open
Abstract
Self-assembling peptides (SAPs) have been increasingly studied as hydrogel-former gelators because they can create biocompatible environments. A common strategy to trigger gelation, is to use a pH variation, but most methods result in a change in pH that is too rapid, leading to gels with hardly reproducible properties. Here, we use the urea-urease reaction to tune gel properties, by a slow and uniform pH increase. We were able to produce very homogeneous and transparent gels at several SAP concentrations, ranging from c=1g/L to c=10g/L. In addition, by exploiting such a pH control strategy, and combining photon correlation imaging with dynamic light scattering measurements, we managed to unravel the mechanism by which gelation occurs in solutions of (LDLK)3-based SAPs. We found that, in diluted and concentrated solutions, gelation follows different pathways. This leads to gels with different microscopic dynamics and capability of trapping nanoparticles. At high concentrations, a strong gel is formed, made of relatively thick and rigid branches that firmly entrap nanoparticles. By contrast, the gel formed in dilute conditions is weaker, characterized by entanglements and crosslinks of very thin and flexible filaments. The gel is still able to entrap nanoparticles, but their motion is not completely arrested. These different gel morphologies can potentially be exploited for controlled multiple drug release.
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Affiliation(s)
- Stefano Buzzaccaro
- Department of Chemistry, Materials Science, and Chemical Engineering (CMIC), Politecnico di Milano, Edificio 6, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Vincenzo Ruzzi
- Department of Chemistry, Materials Science, and Chemical Engineering (CMIC), Politecnico di Milano, Edificio 6, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Fabrizio Gelain
- Unità di Ingegneria Tissutale, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
- Center for Nanomedicine and Tissue Engineering, ASST GOM Niguarda, 20162 Milano, Italy
| | - Roberto Piazza
- Department of Chemistry, Materials Science, and Chemical Engineering (CMIC), Politecnico di Milano, Edificio 6, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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Verbraeken B, Lammens M, Van Rompaey V, Ahmed M, Szewczyk K, Hermans C, Menovsky T. Efficacy and histopathological effects of self-assembling peptides RADA16 and IEIK13 in neurosurgical hemostasis. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 40:102485. [PMID: 34748959 DOI: 10.1016/j.nano.2021.102485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 09/13/2021] [Accepted: 10/25/2021] [Indexed: 10/19/2022]
Abstract
There is a continued need for effective hemostatic agents that are safe for neurosurgical use. Self-assembling peptide hydrogels have been suggested as novel hemostatic agents. They offer some advantages for neurosurgical hemostasis (e.g., transparency), but their efficacy and safety for neurosurgery has not been established. In this paper, the efficacy and safety of two self-assembling peptides, RADA16 and IEIK13, are explored for hemostasis of oozing bleeding on the rat cerebral cortex (n=56). Chronic safety was evaluated by neuropathological evaluation at one, four, and twelve weeks after craniotomy (n=32). An inactive control and oxidized cellulose served as comparators. Mean time-to-hemostasis was significantly shorter for RADA16 and IEIK13 compared to controls, while safety evaluation yielded similar results. Histopathological response consisted primarily of macrophage infiltration at the lesion site in all groups. This study confirms the hemostatic potential and safety of RADA16 and IEIK13 for hemostasis in the rat brain.
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Affiliation(s)
- Barbara Verbraeken
- Department of Translational Neuroscience, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; Department of Neurosurgery, Antwerp University Hospital (UZA), Drie Eikenstraat 655, 2650 Edegem, Belgium.
| | - Martin Lammens
- Department of Translational Neuroscience, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; Department of Pathology, Antwerp University Hospital (UZA), Drie Eikenstraat 655, 2650 Edegem, Belgium.
| | - Vincent Van Rompaey
- Department of Translational Neuroscience, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital (UZA), Drie Eikenstraat 655, 2650 Edegem, Belgium.
| | - Melek Ahmed
- Department of Pathology, Antwerp University Hospital (UZA), Drie Eikenstraat 655, 2650 Edegem, Belgium.
| | - Krystyna Szewczyk
- Department of Translational Neuroscience, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Christophe Hermans
- Department of Pathology, Antwerp University Hospital (UZA), Drie Eikenstraat 655, 2650 Edegem, Belgium; Center for Oncological Research (CORE), University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Tomas Menovsky
- Department of Translational Neuroscience, Faculty of Medicine and Health Sciences, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; Department of Neurosurgery, Antwerp University Hospital (UZA), Drie Eikenstraat 655, 2650 Edegem, Belgium.
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Braun GA, Ary BE, Dear AJ, Rohn MCH, Payson AM, Lee DSM, Parry RC, Friedman C, Knowles TPJ, Linse S, Åkerfeldt KS. On the Mechanism of Self-Assembly by a Hydrogel-Forming Peptide. Biomacromolecules 2020; 21:4781-4794. [PMID: 33170649 DOI: 10.1021/acs.biomac.0c00989] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Self-assembling peptide-based hydrogels are a class of tunable soft materials that have been shown to be highly useful for a number of biomedical applications. The dynamic formation of the supramolecular fibrils that compose these materials has heretofore remained poorly characterized. A better understanding of this process would provide important insights into the behavior of these systems and could aid in the rational design of new peptide hydrogels. Here, we report the determination of the microscopic steps that underpin the self-assembly of a hydrogel-forming peptide, SgI37-49. Using theoretical models of linear polymerization to analyze the kinetic self-assembly data, we show that SgI37-49 fibril formation is driven by fibril-catalyzed secondary nucleation and that all the microscopic processes involved in SgI37-49 self-assembly display an enzyme-like saturation behavior. Moreover, this analysis allows us to quantify the rates of the underlying processes at different peptide concentrations and to calculate the time evolution of these reaction rates over the time course of self-assembly. We demonstrate here a new mechanistic approach for the study of self-assembling hydrogel-forming peptides, which is complementary to commonly used materials science characterization techniques.
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Affiliation(s)
- Gabriel A Braun
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States.,Department of Biochemistry and Structural Biology, Centre for Molecular Protein Science, Lund University, Lund SE-22100, Sweden
| | - Beatrice E Ary
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
| | - Alexander J Dear
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.,Paulson School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Matthew C H Rohn
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
| | - Abigail M Payson
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
| | - David S M Lee
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
| | - Robert C Parry
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
| | - Connie Friedman
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
| | - Tuomas P J Knowles
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K.,Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, U.K
| | - Sara Linse
- Department of Biochemistry and Structural Biology, Centre for Molecular Protein Science, Lund University, Lund SE-22100, Sweden
| | - Karin S Åkerfeldt
- Department of Chemistry, Haverford College, Haverford, Pennsylvania 19041, United States
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Fouani MH, Nikkhah M, Mowla J. Straightforward and Cost-Effective Production of RADA-16I Peptide in Escherichia coli. IRANIAN JOURNAL OF BIOTECHNOLOGY 2019; 17:e2125. [PMID: 31457058 PMCID: PMC6697845 DOI: 10.21859/ijb.2125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Background RADA16I represents one of promising hydrogel forming peptides. Several implementations of RADA16I hydrogels have proven successful in the field of regenerative medicine and tissue engineering. However, RADA16I peptides used in various studies utilize synthetic peptides and so far, only two research articles have been published on RADA16I peptide recombinant production. Moreover, previous studies utilized non- or less routine expression and purification methods to produce RADA16I peptide recombinantly. Objectives The main goal was to produce the self-assembling peptide, RADA16I, in Escherichia coli by exploiting routine and widely used vectors and purification methods, in shake flask. Material and Methods RADA16I coding sequence was inserted in pET31b+, and the construct was transformed into E. coli. Purified fusion constructs were purified using Nickel Sepharose. RADA16I unimers were released using CNBr cleavage. CD and FTIR spectroscopy were used to study recombinant RADA16I's confirmation. TEM was used to confirm fibril formation of recombinant RADA16I. Furthermore, MTT assay was implemented to assess cytocompatibility of recombinant RADA16I. Results The biochemical, biophysical and structural analysis proved the ability of the recombinant RADA16I to form self-assembling peptide nanofibers. Furthermore, the nanofibers exhibited no cytotoxicity and retained their cell adhesive activity. Conclusions We successfully produced RADA16I in acceptable levels and established a basis for future investigation for the production of RADA16I under fermentation conditions.
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Affiliation(s)
- Mohamad Hassan Fouani
- PhD Candidate, Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Maryam Nikkhah
- Associate Professor, Department of Nanobiotechnology, Tarbiat Modares University, Tehran, Iran
| | - Javad Mowla
- Professor, Faculty of Biological Sciences, Tarbiat Modares University Tehran, Iran
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Zhang H, Park J, Jiang Y, Woodrow KA. Rational design of charged peptides that self-assemble into robust nanofibers as immune-functional scaffolds. Acta Biomater 2017; 55:183-193. [PMID: 28365480 DOI: 10.1016/j.actbio.2017.03.041] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 03/13/2017] [Accepted: 03/27/2017] [Indexed: 11/25/2022]
Abstract
Self-assembling peptides programed by sequence design to form predefined nanostructures are useful for a variety of biomedical applications. However, assemblies of classic ionic self-complementary peptides are unstable in neutral pH, while charged peptide hydrogels have low mechanical strength. Here, we report on the rational design of a self-assembling peptide system with optimized charge distribution and density for bioscaffold development. Our designer peptides employs a sequence pattern that undergoes salt triggered self-assembly into β-sheet rich cationic nanofibers in the full pH range (pH 0-14). Our peptides form nanofibrils in physiological condition at a minimum concentration that is significantly lower than has been reported for self-assembly of comparable peptides. The robust fiber-forming ability of our peptides results in the rapid formation of hydrogels in physiological conditions with strong mechanical strength. Moreover, fiber structure is maintained even upon dense conjugation with a model bioactive cargo OVA257-264 peptide. Nanofibers carrying OVA257-264 significantly enhanced CD8+ T cell activation in vitro. Subcutaneous immunization of our peptide fiber vaccine also elicited robust CD8+ T cell activation and proliferation in vivo. Our self-assembling peptides are expected to provide a versatile platform to construct diverse biomaterials. STATEMENT OF SIGNIFICANCE This work is an attempt of rational design of materials from molecular level for targeted properties and an exploration in molecular self-assembly. Current widely studied self-assembling peptides do not have stable nanofiber structures and form weak hydrogels under physiological conditions. To address this issue, we develop charged self-assembling peptides with a novel sequence pattern for strong fiber-forming ability under physiological conditions. Our designer peptides can undergo salt-triggered self-assembly into nanofibers that are ultrastable in extreme pH (0-14) and dilute solutions, and into hydrogels with strong mechanical strength. Upon conjugation with a model bioactive cargo, our self-assembled peptides exhibit great potential as bioscaffolds for multiple applications.
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8
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Owczarz M, Casalini T, Motta AC, Morbidelli M, Arosio P. Contribution of Electrostatics in the Fibril Stability of a Model Ionic-Complementary Peptide. Biomacromolecules 2015; 16:3792-801. [PMID: 26594824 DOI: 10.1021/acs.biomac.5b01092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this work we quantified the role of electrostatic interactions in the self-assembly of a model amphiphilic peptide (RADA 16-I) into fibrillar structures by a combination of size exclusion chromatography and molecular simulations. For the peptide under investigation, it is found that a net charge of +0.75 represents the ideal condition to promote the formation of regular amyloid fibrils. Lower net charges favor the formation of amorphous precipitates, while larger net charges destabilize the fibrillar aggregates and promote a reversible dissociation of monomers from the ends of the fibrils. By quantifying the dependence of the equilibrium constant of this reversible reaction on the pH value and the peptide net charge, we show that electrostatic interactions contribute largely to the free energy of fibril formation. The addition of both salt and a charged destabilizer (guanidinium hydrochloride) at moderate concentration (0.3-1 M) shifts the monomer-fibril equilibrium toward the fibrillar state. Whereas the first effect can be explained by charge screening of electrostatic repulsion only, the promotion of fibril formation in the presence of guanidinium hydrochloride is also attributed to modifications of the peptide conformation. The results of this work indicate that the global peptide net charge is a key property that correlates well with the fibril stability, although the peptide conformation and the surface charge distribution also contribute to the aggregation propensity.
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Affiliation(s)
- Marta Owczarz
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich , 8093 Zurich, Switzerland
| | - Tommaso Casalini
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich , 8093 Zurich, Switzerland
| | - Anna C Motta
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich , 8093 Zurich, Switzerland
| | - Massimo Morbidelli
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich , 8093 Zurich, Switzerland
| | - Paolo Arosio
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich , 8093 Zurich, Switzerland
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9
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Frohm B, DeNizio JE, Lee DSM, Gentile L, Olsson U, Malm J, Akerfeldt KS, Linse S. A peptide from human semenogelin I self-assembles into a pH-responsive hydrogel. SOFT MATTER 2015; 11:414-421. [PMID: 25408475 DOI: 10.1039/c4sm01793e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The peptide GSFSIQYTYHV derived from human semenogelin I forms a transparent hydrogel through spontaneous self-assembly in water at neutral pH. Linear rheology measurements demonstrate that the gel shows a dominating elastic response over a large frequency interval. CD, fluorescence and FTIR spectroscopy and cryo-TEM studies imply long fibrillar aggregates of extended β-sheet. Dynamic light scattering data indicate that the fibril lengths are of the order of micrometers. Time-dependent thioflavin T fluorescence shows that fibril formation by GSFSIQYTYHV is a nucleated reaction. The peptide may serve as basis for development of smart biomaterials of low immunogenicity suitable for biomedical applications, including drug delivery and wound healing.
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Affiliation(s)
- B Frohm
- Biochemistry and Structural Biology, Lund University, P O Box 124, SE-221 00 Lund, Sweden.
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Owczarz M, Bolisetty S, Mezzenga R, Arosio P. Sol–gel transition of charged fibrils composed of a model amphiphilic peptide. J Colloid Interface Sci 2015; 437:244-251. [DOI: 10.1016/j.jcis.2014.09.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/09/2014] [Accepted: 09/10/2014] [Indexed: 10/24/2022]
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Zhang H, Griggs A, Rochet JC, Stanciu LA. In vitro study of α-synuclein protofibrils by cryo-EM suggests a Cu(2+)-dependent aggregation pathway. Biophys J 2014; 104:2706-13. [PMID: 23790379 DOI: 10.1016/j.bpj.2013.04.050] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 04/16/2013] [Accepted: 04/23/2013] [Indexed: 01/25/2023] Open
Abstract
The aggregation of α-synuclein is thought to play a role in the death of dopamine neurons in Parkinson's disease (PD). Alpha-synuclein transitions itself through an aggregation pathway consisting of pathogenic species referred to as protofibrils (or oligomer), which ultimately convert to mature fibrils. The structural heterogeneity and instability of protofibrils has significantly impeded advance related to the understanding of their structural characteristics and the amyloid aggregation mystery. Here, we report, to our knowledge for the first time, on α-synuclein protofibril structural characteristics with cryo-electron microscopy. Statistical analysis of annular protofibrils revealed a constant wall thickness as a common feature. The visualization of the assembly steps enabled us to propose a novel, to our knowledge, mechanisms for α-synuclein aggregation involving ring-opening and protofibril-protofibril interaction events. The ion channel-like protofibrils and their membrane permeability have also been found in other amyloid diseases, suggesting a common molecular mechanism of pathological aggregation. Our direct visualization of the aggregation pathway of α-synuclein opens up fresh opportunities to advance the understanding of protein aggregation mechanisms relevant to many amyloid diseases. In turn, this information would enable the development of additional therapeutic strategies aimed at suppressing toxic protofibrils of amyloid proteins involved in neurological disorders.
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Affiliation(s)
- Hangyu Zhang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA
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Kabiri M, Bushnak I, McDermot MT, Unsworth LD. Toward a Mechanistic Understanding of Ionic Self-Complementary Peptide Self-Assembly: Role of Water Molecules and Ions. Biomacromolecules 2013; 14:3943-50. [DOI: 10.1021/bm401077b] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | | | - Mark T. McDermot
- NanoLife
Group, National Institute for Nanotechnology, National Research Council (Canada), Edmonton, Alberta, Canada
| | - Larry D. Unsworth
- NanoLife
Group, National Institute for Nanotechnology, National Research Council (Canada), Edmonton, Alberta, Canada
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Cheng TY, Wu HC, Huang MY, Chang WH, Lee CH, Wang TW. Self-assembling functionalized nanopeptides for immediate hemostasis and accelerative liver tissue regeneration. NANOSCALE 2013; 5:2734-2744. [PMID: 23426280 DOI: 10.1039/c3nr33710c] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Traumatic injury or surgery may trigger extensive bleeding. However, conventional hemostatic methods have limited efficacy and may cause surrounding tissue damage. In this study, we use self-assembling peptides (SAPs) and specifically extend fragments of functional motifs derived from fibronectin and laminin to evaluate the capability of these functionalized SAPs in the effect of hemostasis and liver tissue regeneration. From the results, these peptides can self-assemble into nanofibrous network structure and gelate into hydrogel with pH adjustment. In animal studies, the efficacy of hemostasis is achieved immediately within seconds in a rat liver model. The histological analyses by hematoxylin-eosin stain and immunohistochemistry reveal that SAPs with these functionalized motifs significantly enhance liver tissue regeneration. In brief, these SAPs may have potential as pharmacological tools to extensively advance clinical therapeutic applications in hemostasis and tissue regeneration in the field of regenerative medicine.
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Affiliation(s)
- Tzu-Yun Cheng
- Department of Materials Science and Engineering, and Institute of Biomedical Engineering, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan 30013, ROC
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Liu J, Zhao X. Design of self-assembling peptides and their biomedical applications. Nanomedicine (Lond) 2011; 6:1621-43. [PMID: 22077465 DOI: 10.2217/nnm.11.142] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Combining physics, engineering, chemistry and biology, we can now design, synthesize and fabricate biological nanomaterials at the molecular scale using self-assembling peptide systems. These peptides have been used for fabrication of nanomaterials, including nanofibers, nanotubes and vesicles, nanometer-thick surface coating and nanowires. Some of these peptides are used for stabilizing membrane proteins and drug delivery, and others provide a more permissive environment for 3D cell culture, tissue engineering and repair of tissues in regenerative medicine. Self-assembling peptides are also useful for fabricating a wide spectrum of exquisitely fine architectures, nanomaterials and nanodevices for nanomedicine and nanobiotechnology. These peptide systems lie at the interface between molecular biology, chemistry, materials science and engineering. The studies of designed self-assembling peptides and their applications will help us to understand nature’s enormous power and how to apply it to benefit other disciplines and society.
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Affiliation(s)
- Jingping Liu
- West China Hospital Laboratory of Nanomedicine & Institute for Nanobiomedical Technology & Membrane Biology, Sichuan University, Chengdu, 610041, China
- Key Laboratory of Transplant Engineering & Immunology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiaojun Zhao
- Center for Biomedical Engineering, NE47-379, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
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