1
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Dong S, Chapman SL, Pluen A, Richardson SM, Miller AF, Saiani A. Effect of Peptide-Polymer Host-Guest Electrostatic Interactions on Self-Assembling Peptide Hydrogels Structural and Mechanical Properties and Polymer Diffusivity. Biomacromolecules 2024; 25:3628-3641. [PMID: 38771115 PMCID: PMC11170954 DOI: 10.1021/acs.biomac.4c00232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 05/22/2024]
Abstract
Peptide-based supramolecular hydrogels are an attractive class of soft materials for biomedical applications when biocompatibility is a key requirement as they exploit the physical self-assembly of short self-assembling peptides avoiding the need for chemical cross-linking. Based on the knowledge developed through our previous work, we designed two novel peptides, E(FKFE)2 and K(FEFK)2, that form transparent hydrogels at pH 7. We characterized the phase behavior of these peptides and showed the clear link that exists between the charge carried by the peptides and the physical state of the samples. We subsequently demonstrate the cytocompatibility of the hydrogel and its suitability for 3D cell culture using 3T3 fibroblasts and human mesenchymal stem cells. We then loaded the hydrogels with two polymers, poly-l-lysine and dextran. When polymer and peptide fibers carry opposite charges, the size of the elemental fibril formed decreases, while the overall level of fiber aggregation and fiber bundle formation increases. This overall network topology change, and increase in cross-link stability and density, leads to an overall increase in the hydrogel mechanical properties and stability, i.e., resistance to swelling when placed in excess media. Finally, we investigate the diffusion of the polymers out of the hydrogels and show how electrostatic interactions can be used to control the release of large molecules. The work clearly shows how polymers can be used to tailor the properties of peptide hydrogels through guided intermolecular interactions and demonstrates the potential of these new soft hydrogels for use in the biomedical field in particular for delivery or large molecular payloads and cells as well as scaffolds for 3D cell culture.
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Affiliation(s)
- Siyuan Dong
- Department
of Chemical Engineering, School of Engineering, Faculty of Science
and Engineering, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
- Manchester
Institute of Biotechnology (MIB), Faculty of Science and Engineering, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
| | - Sam L. Chapman
- Division
of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology,
Medicine and Health, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
| | - Alain Pluen
- Division
of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology,
Medicine and Health, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
| | - Stephen M. Richardson
- Division
of Cell Matrix Biology and Regenerative Medicine, School of Biological
Sciences, Faculty of Biology, Medicine and Health, Manchester Academic
Health Science Centre, The University of
Manchester, Manchester M13 9PT, U.K.
| | - Aline F. Miller
- Department
of Chemical Engineering, School of Engineering, Faculty of Science
and Engineering, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
- Manchester
Institute of Biotechnology (MIB), Faculty of Science and Engineering, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
| | - Alberto Saiani
- Manchester
Institute of Biotechnology (MIB), Faculty of Science and Engineering, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
- Division
of Pharmacy and Optometry, School of Health Sciences, Faculty of Biology,
Medicine and Health, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
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2
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La Manna S, Florio D, Panzetta V, Roviello V, Netti PA, Di Natale C, Marasco D. Hydrogelation tunability of bioinspired short peptides. SOFT MATTER 2022; 18:8418-8426. [PMID: 36300826 DOI: 10.1039/d2sm01385a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Supramolecular assemblies of short peptides are experiencing a stimulating flowering. Herein, we report a novel class of bioinspired pentapeptides, not bearing Phe, that form hydrogels with fibrillar structures. The inherent sequence comes from the fragment 269-273 of nucleophosmin 1 protein, that is normally involved in liquid-liquid phase separation processes into the nucleolus. By means of rheology, spectroscopy, and scanning microscopy the crucial roles of the extremities in the modulation of the mechanical properties of hydrogels were elucidated. Three of four peptide showed a typical shear-thinning profile and a self-assembly into hierarchical nanostructures fibers and two of them resulted biocompatible in MCF7 cells. The presence of an amide group at C-terminal extremity caused the fastest aggregation and the major content of structured intermediates during gelling process. The tunable mechanical and structural features of this class of hydrogels render derived supramolecular systems versatile and suitable for future biomedical applications.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples "Federico II", 80131, Naples, Italy.
| | - Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", 80131, Naples, Italy.
| | - Valeria Panzetta
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples "Federico II", 80125, Naples, Italy
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
- Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Valentina Roviello
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
| | - Paolo Antonio Netti
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples "Federico II", 80125, Naples, Italy
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
- Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Concetta Di Natale
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples "Federico II", 80125, Naples, Italy
- Department of Ingegneria Chimica del Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 80125, Naples, Italy
- Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125, Naples, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", 80131, Naples, Italy.
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3
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Elsawy MA, Wychowaniec JK, Castillo Díaz LA, Smith AM, Miller AF, Saiani A. Controlling Doxorubicin Release from a Peptide Hydrogel through Fine-Tuning of Drug-Peptide Fiber Interactions. Biomacromolecules 2022; 23:2624-2634. [PMID: 35543610 PMCID: PMC9198986 DOI: 10.1021/acs.biomac.2c00356] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
![]()
Hydrogels are versatile
materials that have emerged in the last
few decades as promising candidates for a range of applications in
the biomedical field, from tissue engineering and regenerative medicine
to controlled drug delivery. In the drug delivery field, in particular,
they have been the subject of significant interest for the spatially
and temporally controlled delivery of anticancer drugs and therapeutics.
Self-assembling peptide-based hydrogels, in particular, have recently
come to the fore as potential candidate vehicles for the delivery
of a range of drugs. In order to explore how drug–peptide interactions
influence doxorubicin (Dox) release, five β-sheet-forming self-assembling
peptides with different physicochemical properties were used for the
purpose of this study, namely: FEFKFEFK (F8), FKFEFKFK (FK), FEFEFKFE
(FE), FEFKFEFKK (F8K), and KFEFKFEFKK (KF8K) (F: phenylalanine; E:
glutamic acid; K: lysine). First, Dox-loaded hydrogels were characterized
to ensure that the incorporation of the drug did not significantly
affect the hydrogel properties. Subsequently, Dox diffusion out of
the hydrogels was investigated using UV absorbance. The amount of
drug retained in F8/FE composite hydrogels was found to be directly
proportional to the amount of charge carried by the peptide fibers.
When cation−π interactions were used, the position and
number of end-lysine were found to play a key role in the retention
of Dox. In this case, the amount of Dox retained in F8/KF8K composite
hydrogels was linked to the amount of end-lysine introduced, and an
end-lysine/Dox interaction stoichiometry of 3/1 was obtained. For
pure FE and KF8K hydrogels, the maximum amount of Dox retained was
also found to be related to the overall concentration of the hydrogels
and, therefore, to the overall fiber surface area available for interaction
with the drug. For 14 mM hydrogel, ∼170–200 μM
Dox could be retained after 24 h. This set of peptides also showed
a broad range of susceptibilities to enzymatic degradation opening
the prospect of being able to control also the rate of degradation
of these hydrogels. Finally, the Dox released from the hydrogel was
shown to be active and affect 3T3 mouse fibroblasts viability in vitro.
Our study clearly shows the potential of this peptide design as a
platform for the formulation of injectable or sprayable hydrogels
for controlled drug delivery.
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Affiliation(s)
- Mohamed A Elsawy
- Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Manchester Institute of Biotechnology, Oxford Road, Manchester M13 9PL, U.K
| | - Jacek K Wychowaniec
- Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Manchester Institute of Biotechnology, Oxford Road, Manchester M13 9PL, U.K
| | - Luis A Castillo Díaz
- Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Manchester Institute of Biotechnology, Oxford Road, Manchester M13 9PL, U.K
| | - Andrew M Smith
- Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Manchester Institute of Biotechnology, Oxford Road, Manchester M13 9PL, U.K
| | - Aline F Miller
- Manchester Institute of Biotechnology, Oxford Road, Manchester M13 9PL, U.K.,Department of Chemical Engineering and Analytical Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Alberto Saiani
- Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.,Manchester Institute of Biotechnology, Oxford Road, Manchester M13 9PL, U.K
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4
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Sheehan F, Sementa D, Jain A, Kumar M, Tayarani-Najjaran M, Kroiss D, Ulijn RV. Peptide-Based Supramolecular Systems Chemistry. Chem Rev 2021; 121:13869-13914. [PMID: 34519481 DOI: 10.1021/acs.chemrev.1c00089] [Citation(s) in RCA: 128] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Peptide-based supramolecular systems chemistry seeks to mimic the ability of life forms to use conserved sets of building blocks and chemical reactions to achieve a bewildering array of functions. Building on the design principles for short peptide-based nanomaterials with properties, such as self-assembly, recognition, catalysis, and actuation, are increasingly available. Peptide-based supramolecular systems chemistry is starting to address the far greater challenge of systems-level design to access complex functions that emerge when multiple reactions and interactions are coordinated and integrated. We discuss key features relevant to systems-level design, including regulating supramolecular order and disorder, development of active and adaptive systems by considering kinetic and thermodynamic design aspects and combinatorial dynamic covalent and noncovalent interactions. Finally, we discuss how structural and dynamic design concepts, including preorganization and induced fit, are critical to the ability to develop adaptive materials with adaptive and tunable photonic, electronic, and catalytic properties. Finally, we highlight examples where multiple features are combined, resulting in chemical systems and materials that display adaptive properties that cannot be achieved without this level of integration.
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Affiliation(s)
- Fahmeed Sheehan
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States.,Department of Chemistry, Hunter College City University of New York 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry The Graduate Center of the City University of New York 365 fifth Avenue, New York, New York 10016, United States
| | - Deborah Sementa
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States
| | - Ankit Jain
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States
| | - Mohit Kumar
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States.,Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology (BIST), Baldiri i Reixac 10-12, Barcelona 08028, Spain
| | - Mona Tayarani-Najjaran
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States.,Department of Chemistry, Hunter College City University of New York 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry The Graduate Center of the City University of New York 365 fifth Avenue, New York, New York 10016, United States
| | - Daniela Kroiss
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States.,Department of Chemistry, Hunter College City University of New York 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Biochemistry The Graduate Center of the City University of New York 365 5th Avenue, New York, New York 10016, United States
| | - Rein V Ulijn
- Advanced Science Research Center (ASRC) at the Graduate Center City University of New York 85 St. Nicholas Terrace New York, New York 10031, United States.,Department of Chemistry, Hunter College City University of New York 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry The Graduate Center of the City University of New York 365 fifth Avenue, New York, New York 10016, United States.,Ph.D. Program in Biochemistry The Graduate Center of the City University of New York 365 5th Avenue, New York, New York 10016, United States
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5
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Quantitative nanomechanical properties evaluation of a family of β-sheet peptide fibres using rapid bimodal AFM. J Mech Behav Biomed Mater 2021; 124:104776. [PMID: 34479107 DOI: 10.1016/j.jmbbm.2021.104776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/16/2021] [Accepted: 08/10/2021] [Indexed: 11/20/2022]
Abstract
Self-assembling peptides have become important building blocks for materials design (e.g. hydrogels) and play a crucial role in a range of diseases including Alzheimer and Parkinson. In this context, accessing the nanomechanical properties of ubiquitous β-sheet rich nanofibres (e.g.: amyloids) is key to the formulation of materials and design of therapies. Although the bulk mechanical properties of hydrogels can easily be accessed using common techniques and equipment, the mechanical properties of their constituent fibres, in particular if with radii in the nanometre scale, are more challenging to measure and estimate. In this work we show for the first time how the rapid nanomechanical mapping technique: amplitude modulation-frequency modulation (AM-FM), can be used to determine the heights, Young's moduli and viscosity coefficients of a series of β-sheet peptide nanofibres with high statistical confidence. Our results show how peptide sequence and in particular length, charge and interaction with the substrate affect the viscoelastic properties of the peptide fibres.
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6
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Balasco N, Diaferia C, Morelli G, Vitagliano L, Accardo A. Amyloid-Like Aggregation in Diseases and Biomaterials: Osmosis of Structural Information. Front Bioeng Biotechnol 2021; 9:641372. [PMID: 33748087 PMCID: PMC7966729 DOI: 10.3389/fbioe.2021.641372] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/05/2021] [Indexed: 11/13/2022] Open
Abstract
The discovery that the polypeptide chain has a remarkable and intrinsic propensity to form amyloid-like aggregates endowed with an extraordinary stability is one of the most relevant breakthroughs of the last decades in both protein/peptide chemistry and structural biology. This observation has fundamental implications, as the formation of these assemblies is systematically associated with the insurgence of severe neurodegenerative diseases. Although the ability of proteins to form aggregates rich in cross-β structure has been highlighted by recent studies of structural biology, the determination of the underlying atomic models has required immense efforts and inventiveness. Interestingly, the progressive molecular and structural characterization of these assemblies has opened new perspectives in apparently unrelated fields. Indeed, the self-assembling through the cross-β structure has been exploited to generate innovative biomaterials endowed with promising mechanical and spectroscopic properties. Therefore, this structural motif has become the fil rouge connecting these diversified research areas. In the present review, we report a chronological recapitulation, also performing a survey of the structural content of the Protein Data Bank, of the milestones achieved over the years in the characterization of cross-β assemblies involved in the insurgence of neurodegenerative diseases. A particular emphasis is given to the very recent successful elucidation of amyloid-like aggregates characterized by remarkable molecular and structural complexities. We also review the state of the art of the structural characterization of cross-β based biomaterials by highlighting the benefits of the osmosis of information between these two research areas. Finally, we underline the new promising perspectives that recent successful characterizations of disease-related amyloid-like assemblies can open in the biomaterial field.
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Affiliation(s)
- Nicole Balasco
- Institute of Biostructures and Bioimaging (IBB), CNR, Naples, Italy
| | - Carlo Diaferia
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Naples, Italy
| | - Giancarlo Morelli
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Naples, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging (IBB), CNR, Naples, Italy
| | - Antonella Accardo
- Department of Pharmacy, Research Centre on Bioactive Peptides (CIRPeB), University of Naples “Federico II”, Naples, Italy
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7
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Kaur H, Sharma P, Patel N, Pal VK, Roy S. Accessing Highly Tunable Nanostructured Hydrogels in a Short Ionic Complementary Peptide Sequence via pH Trigger. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12107-12120. [PMID: 32988205 DOI: 10.1021/acs.langmuir.0c01472] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Creating diverse nanostructures from a single gelator through modulating the self-assembly pathway has been gaining much attention in recent years. To this direction, we are exploring the effect of modulation of pH as a potential self-assembly pathway in governing the physicochemical properties of the final gel phase material. In this context, we used a classical nongelator with the ionic complementary sequence FEFK, which was rationally conjugated to an aromatic group naphthoxyacetic acid (Nap) at the N-terminal end to tune its gelation behavior. Interestingly, the presence of oppositely charged amino acids in the peptide amphiphile resulted in pH-responsive behavior, leading to the formation of hydrogels over a wide pH range (2.0-12.0); however, their structures differ significantly at the nanoscale. Thus, by simply manipulating the overall charge over the exposed surface of the peptide amphiphiles as a function of pH, we were able to access diverse self-assembled nanostructures within a single gelator domain. The charged state of the gelator at the extreme pH (2.0, 12.0) led to a thinner fiber formation, in contrast to the thicker fibers observed near the physiological pH owing to charge neutralization, thus promoting the lateral association. Such variation in molecular packing was found to be further reflected in the variable mechanical strengths of the peptide hydrogels obtained at different pH values. Moreover, the gelation of the peptide at physiological pH offers an additional advantage to explore this hydrogel as a cell culture scaffold. We anticipate that our study on controlling the self-assembly pathway of the ionic complementary peptide amphiphile can be an elegant approach to access diverse self-assembled materials, which can expand the zone of its applicability as a stimuli-responsive biomaterial.
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Affiliation(s)
- Harsimran Kaur
- Habitat Centre, Institute of Nano Science and Technology, Sector 64, Phase 10, Mohali, Punjab 160062, India
| | - Pooja Sharma
- Habitat Centre, Institute of Nano Science and Technology, Sector 64, Phase 10, Mohali, Punjab 160062, India
| | - Nidhi Patel
- Habitat Centre, Institute of Nano Science and Technology, Sector 64, Phase 10, Mohali, Punjab 160062, India
| | - Vijay Kumar Pal
- Habitat Centre, Institute of Nano Science and Technology, Sector 64, Phase 10, Mohali, Punjab 160062, India
| | - Sangita Roy
- Habitat Centre, Institute of Nano Science and Technology, Sector 64, Phase 10, Mohali, Punjab 160062, India
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8
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Sasselli IR, Syrgiannis Z. Small Molecules Organic Co‐Assemblies as Functional Nanomaterials. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ivan R. Sasselli
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE) Basque Research and Technology Alliance (BRTA) Paseo de Miramon 182 20014 Donostia San Sebastián Spain
| | - Zois Syrgiannis
- Centre of Excellence for Nanostructured Materials (CENMAT) INSTM, unit of Trieste, Dipartimento di Scienze Chimiche e Farmaceutiche Università di Trieste via L. Giorgieri 1 34127 Trieste Italy
- Simpson Querrey Institute Northwestern University 303 East Superior Street 60611 Chicago IL USA
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9
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Wychowaniec J, Smith AM, Ligorio C, Mykhaylyk OO, Miller AF, Saiani A. Role of Sheet-Edge Interactions in β-sheet Self-Assembling Peptide Hydrogels. Biomacromolecules 2020; 21:2285-2297. [PMID: 32275138 PMCID: PMC7304824 DOI: 10.1021/acs.biomac.0c00229] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 04/08/2020] [Indexed: 12/11/2022]
Abstract
Hydrogels' hydrated fibrillar nature makes them the material of choice for the design and engineering of 3D scaffolds for cell culture, tissue engineering, and drug-delivery applications. One particular class of hydrogels which has been the focus of significant research is self-assembling peptide hydrogels. In the present work, we were interested in exploring how fiber-fiber edge interactions affect the self-assembly and gelation properties of amphipathic peptides. For this purpose, we investigated two β-sheet-forming peptides, FEFKFEFK (F8) and KFEFKFEFKK (KF8K), the latter one having the fiber edges covered by lysine residues. Our results showed that the addition of the two lysine residues did not affect the ability of the peptides to form β-sheet-rich fibers, provided that the overall charge carried by the two peptides was kept constant. However, it did significantly reduce edge-driven hydrophobic fiber-fiber associative interactions, resulting in reduced tendency for KF8K fibers to associate/aggregate laterally and form large fiber bundles and consequently network cross-links. This effect resulted in the formation of hydrogels with lower moduli but faster dynamics. As a result, KF8K fibers could be aligned only under high shear and at high concentration while F8 hydrogel fibers were found to align readily at low shear and low concentration. In addition, F8 hydrogels were found to fragment at high concentration because of the high aggregation state stabilizing the fiber bundles, resulting in fiber breakage rather than disentanglement and alignment.
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Affiliation(s)
- Jacek
K. Wychowaniec
- School
of Materials, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
- Manchester
Institute of Biotechnology, The University
of Manchester, Oxford
Road, M13 9PL Manchester, U.K.
| | - Andrew M. Smith
- School
of Materials, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
- Manchester
Institute of Biotechnology, The University
of Manchester, Oxford
Road, M13 9PL Manchester, U.K.
| | - Cosimo Ligorio
- School
of Materials, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
- Manchester
Institute of Biotechnology, The University
of Manchester, Oxford
Road, M13 9PL Manchester, U.K.
| | - Oleksandr O. Mykhaylyk
- Soft
Matter Analytical Laboratory, Dainton Building, Department of Chemistry, The University of Sheffield, Sheffield S3 7HF, U.K.
| | - Aline F. Miller
- Manchester
Institute of Biotechnology, The University
of Manchester, Oxford
Road, M13 9PL Manchester, U.K.
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
| | - Alberto Saiani
- School
of Materials, The University of Manchester, Oxford Road, M13 9PL Manchester, U.K.
- Manchester
Institute of Biotechnology, The University
of Manchester, Oxford
Road, M13 9PL Manchester, U.K.
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10
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Ariawan AD, Sun B, Wojciechowski JP, Lin I, Du EY, Goodchild SC, Cranfield CG, Ittner LM, Thordarson P, Martin AD. Effect of polar amino acid incorporation on Fmoc-diphenylalanine-based tetrapeptides. SOFT MATTER 2020; 16:4800-4805. [PMID: 32400837 DOI: 10.1039/d0sm00320d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Peptide hydrogels show great promise as extracellular matrix mimics due to their tuneable, fibrous nature. Through incorporation of polar cationic, polar anionic or polar neutral amino acids into the Fmoc-diphenylalanine motif, we show that electrostatic charge plays a key role in the properties of the subsequent gelators. Specifically, we show that an inverse relationship exists for biocompatibility in the solution state versus the gel state for cationic and anionic peptides. Finally, we use tethered bilayer lipid membrane (tBLM) experiments to suggest a likely mode of cytotoxicity for tetrapeptides which exhibit cytotoxicity in the solution state.
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Affiliation(s)
- A Daryl Ariawan
- Dementia Research Centre, Department of Biomedical Science, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW 2109, Australia.
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11
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Barman R, Dey P, Mondal T, Ghosh S. Synthesis and Self‐assembly of a Helical Polymer Grafted from a Foldable Polyurethane Scaffold. Chem Asian J 2019; 14:4741-4747. [DOI: 10.1002/asia.201901119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/16/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Ranajit Barman
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Pradip Dey
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Tathagata Mondal
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
- Institut Charles Sadron 67034 Strasbourg France
| | - Suhrit Ghosh
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
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12
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Tang JD, Mura C, Lampe KJ. Stimuli-Responsive, Pentapeptide, Nanofiber Hydrogel for Tissue Engineering. J Am Chem Soc 2019; 141:4886-4899. [PMID: 30830776 DOI: 10.1021/jacs.8b13363] [Citation(s) in RCA: 167] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Short peptides are uniquely versatile building blocks for self-assembly. Supramolecular peptide assemblies can be used to construct functional hydrogel biomaterials-an attractive approach for neural tissue engineering. Here, we report a new class of short, five-residue peptides that form hydrogels with nanofiber structures. Using rheology and spectroscopy, we describe how sequence variations, pH, and peptide concentration alter the mechanical properties of our pentapeptide hydrogels. We find that this class of seven unmodified peptides forms robust hydrogels from 0.2-20 kPa at low weight percent (less than 3 wt %) in cell culture media and undergoes shear-thinning and rapid self-healing. The peptides self-assemble into long fibrils with sequence-dependent fibrillar morphologies. These fibrils exhibit a unique twisted ribbon shape, as visualized by transmission electron microscopy (TEM) and Cryo-EM imaging, with diameters in the low tens of nanometers and periodicities similar to amyloid fibrils. Experimental gelation behavior corroborates our molecular dynamics simulations, which demonstrate peptide assembly behavior, an increase in β-sheet content, and patterns of variation in solvent accessibility. Our rapidly assembling pentapeptides for injectable delivery (RAPID) hydrogels are syringe-injectable and support cytocompatible encapsulation of oligodendrocyte progenitor cells (OPCs), as well as their proliferation and three-dimensional process extension. Furthermore, RAPID gels protect OPCs from mechanical membrane disruption and acute loss of viability when ejected from a syringe needle, highlighting the protective capability of the hydrogel as potential cell carriers for transplantation therapies. The tunable mechanical and structural properties of these supramolecular assemblies are shown to be permissive to cell expansion and remodeling, making this hydrogel system suitable as an injectable material for cell delivery and tissue engineering applications.
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13
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Wychowaniec JK, Iliut M, Zhou M, Moffat J, Elsawy MA, Pinheiro WA, Hoyland JA, Miller AF, Vijayaraghavan A, Saiani A. Designing Peptide/Graphene Hybrid Hydrogels through Fine-Tuning of Molecular Interactions. Biomacromolecules 2018; 19:2731-2741. [PMID: 29672029 DOI: 10.1021/acs.biomac.8b00333] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A recent strategy that has emerged for the design of increasingly functional hydrogels is the incorporation of nanofillers in order to exploit their specific properties to either modify the performance of the hydrogel or add functionality. The emergence of carbon nanomaterials in particular has provided great opportunity for the use of graphene derivatives (GDs) in biomedical applications. The key challenge when designing hybrid materials is the understanding of the molecular interactions between the matrix (peptide nanofibers) and the nanofiller (here GDs) and how these affect the final properties of the bulk material. For the purpose of this work, three gelling β-sheet-forming, self-assembling peptides with varying physiochemical properties and five GDs with varying surface chemistries were chosen to formulate novel hybrid hydrogels. First the peptide hydrogels and the GDs were characterized; subsequently, the molecular interaction between peptides nanofibers and GDs were probed before formulating and mechanically characterizing the hybrid hydrogels. We show how the interplay between electrostatic interactions, which can be attractive or repulsive, and hydrophobic (and π-π in the case of peptide containing phenylalanine) interactions, which are always attractive, play a key role on the final properties of the hybrid hydrogels. The shear modulus of the hydrid hydrogels is shown to be related to the strength of fiber adhesion to the flakes, the overall hydrophobicity of the peptides, as well as the type of fibrillar network formed. Finally, the cytotoxicity of the hybrid hydrogel formed at pH 6 was also investigated by encapsulating and culturing human mesemchymal stem cells (hMSC) over 14 days. This work clearly shows how interactions between peptides and GDs can be used to tailor the mechanical properties of the resulting hydrogels, allowing the incorporation of GD nanofillers in a controlled way and opening the possibility to exploit their intrinsic properties to design novel hybrid peptide hydrogels for biomedical applications.
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Affiliation(s)
- Jacek K Wychowaniec
- School of Materials , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,Manchester Institute of Biotechnology , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom
| | - Maria Iliut
- School of Materials , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,National Graphene Institute , The University of Manchester , Booth Street East , M13 9PL , Manchester , United Kingdom
| | - Mi Zhou
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health , The University of Manchester , M13 9PL , Manchester , United Kingdom
| | - Jonathan Moffat
- UK Asylum Research, An Oxford Instruments Company , Halifax Road , HP12 3SE , High Wycombe , United Kingdom
| | - Mohamed A Elsawy
- School of Materials , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,Manchester Institute of Biotechnology , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom
| | - Wagner A Pinheiro
- School of Materials , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,Military Institute of Engineering , Praça Gen Tibúrcio 80 , Urca, Rio de Janeiro , Rio de Janeiro 22290-270 , Brazil
| | - Judith A Hoyland
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health , The University of Manchester , M13 9PL , Manchester , United Kingdom.,NIHR Manchester Musculoskeletal Biomedical Research Centre, Manchester Academic Health Science Centre , Central Manchester NHS Foundation Trust , Manchester M23 9LT , United Kingdom
| | - Aline F Miller
- Manchester Institute of Biotechnology , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,School of Chemical Engineering and Analytical Sciences , The University of Manchester, M13 9PL , Manchester , United Kingdom
| | - Aravind Vijayaraghavan
- School of Materials , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,National Graphene Institute , The University of Manchester , Booth Street East , M13 9PL , Manchester , United Kingdom
| | - Alberto Saiani
- School of Materials , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom.,Manchester Institute of Biotechnology , The University of Manchester , Oxford Road , M13 9PL , Manchester , United Kingdom
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14
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Høgstedt UB, Østergaard J, Weiss T, Sjögren H, van de Weert M. Manipulating Aggregation Behavior of the Uncharged Peptide Carbetocin. J Pharm Sci 2018; 107:838-847. [DOI: 10.1016/j.xphs.2017.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 10/12/2017] [Accepted: 11/09/2017] [Indexed: 10/18/2022]
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15
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King PJS, Saiani A, Bichenkova EV, Miller AF. A de novo self-assembling peptide hydrogel biosensor with covalently immobilised DNA-recognising motifs. Chem Commun (Camb) 2017; 52:6697-700. [PMID: 27117274 DOI: 10.1039/c6cc01433j] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We report here the first experimental evidence of a self-assembling three-dimensional (3D) peptide hydrogel, with recognition motifs immobilized on the surface of fibres capable of sequence-specific oligonucleotide detection. These systems have the potential to be further developed into diagnostic and prognostic tools in human pathophysiology.
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Affiliation(s)
- Patrick J S King
- Manchester School of Pharmacy, the University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT, UK.
| | - Alberto Saiani
- School of Chemical Engineering and Analytical Science, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Elena V Bichenkova
- Manchester School of Pharmacy, the University of Manchester, Stopford Building, Oxford Road, Manchester, M13 9PT, UK.
| | - Aline F Miller
- School of Chemical Engineering and Analytical Science, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK.
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16
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Affiliation(s)
- I. W. Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
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17
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Morris O, Elsawy MA, Fairclough M, Williams KJ, Mcmahon A, Grigg J, Forster D, Miller AF, Saiani A, Prenant C. In vivo characterisation of a therapeutically relevant self-assembling 18 F-labelled β-sheet forming peptide and its hydrogel using positron emission tomography. J Labelled Comp Radiopharm 2017. [PMID: 28623878 PMCID: PMC5601235 DOI: 10.1002/jlcr.3534] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Positron emission tomography (PET) and fluorescence labelling have been used to assess the pharmacokinetics, biodistribution and eventual fate of a hydrogel‐forming nonapeptide, FEFKFEFKK (F9), in healthy mice, using 18F‐labelled and fluorescein isothiocyanate (FITC)‐labelled F9 analogues. F9 was site‐specifically radiolabelled with 2‐[18F]fluoro‐3‐pyridinecarboxaldehyde ([18F]FPCA) via oxime bond formation. [18F]FPCA‐F9 in vivo fate was evaluated both as a solution, following intravenous administration, and as a hydrogel when subcutaneously injected. The behaviour of FITC‐F9 hydrogel was assessed following subcutaneous injection. [18F]FPCA‐F9 demonstrated high plasma stability and primarily renal excretion; [18F]FPCA‐F9 when in solution and injected into the bloodstream displayed prompt bladder uptake (53.4 ± 16.6 SUV at 20 minutes postinjection) and rapid renal excretion, whereas [18F]FPCA‐F9 hydrogel, formed by co‐assembly of [18F]FPCA‐F9 monomer with unfunctionalised F9 peptide and injected subcutaneously, showed gradual bladder accumulation of hydrogel fragments (3.8 ± 0.4 SUV at 20 minutes postinjection), resulting in slower renal excretion. Gradual disaggregation of the F9 hydrogel from the site of injection was monitored using FITC‐F9 hydrogel in healthy mice (60 ± 3 over 96 hours), indicating a biological half‐life between 1 and 4 days. The in vivo characterisation of F9, both as a gel and a solution, highlights its potential as a biomaterial.
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Affiliation(s)
- O Morris
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - M A Elsawy
- School of Materials, The University of Manchester, UK.,Manchester Institute of Biotechnology, The University of Manchester, UK.,School of Pharmacy and Biomedical Sciences, University of Central Lancashire, UK
| | - M Fairclough
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - K J Williams
- CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK.,Manchester Pharmacy School, The University of Manchester, UK
| | - A Mcmahon
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - J Grigg
- GE Healthcare, Little Chalfont, UK
| | - D Forster
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - A F Miller
- Manchester Institute of Biotechnology, The University of Manchester, UK.,School of Chemical Engineering and Analytical Science, The University of Manchester, UK
| | - A Saiani
- School of Materials, The University of Manchester, UK.,Manchester Institute of Biotechnology, The University of Manchester, UK.,School of Chemical Engineering and Analytical Science, The University of Manchester, UK
| | - C Prenant
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
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18
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Abstract
Silk biomaterials can be designed to provide an architectural framework comparable to connate extracellular matrix in order to boost cell growth and eventual tissue regeneration. Silk (Bombyx mori) fibroins self-assemble into hydrophobic crystalline β sheets, which provide mechanical strength and tunable degradability. The next generation of tissue engineering scaffolds aim to provide spatially controlled modulation of cell adhesion and differentiation, which can be achieved by spatially controlled surface functionalization of the scaffolds. In this respect, it is even more important to be able to release molecules at timescales ranging from hours to days, as many biological processes require signals early on to initiate processes, and over prolonged periods to sustain them. Unfortunately, achieving spatio-temporal control over multiple release profiles from silk based substrates is challenging due to their intrinsic slow release behaviour. Here, we report a simple strategy that provides spatio-temporal control over the release of drugs from silk films (SFs). We have developed a UV based strategy to modify the SFs with nanogels, which can provide a fast as well as slow release profile from a single platform. We demonstrate that the release profile of encapsulated molecules on the SF substrate can be tuned from fast (within hours) to slow (within days), thus resulting in a dual release system, which can be eventually utilized to deliver bioactive molecules at specific regions with different rates to achieve the desired multiple biological effects.
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Affiliation(s)
- Vartika Dhyani
- Centre for Biomedical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India. Biomedical Engineering Unit, All India Institute of Medical Science, Ansari Nagar, New Delhi 110029, India
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19
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Sinthuvanich C, Nagy-Smith KJ, Walsh STR, Schneider JP. Triggered Formation of Anionic Hydrogels from Self-Assembling Acidic Peptide Amphiphiles. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01056] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Chomdao Sinthuvanich
- Chemical Biology Laboratory,
National Cancer Institute, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Katelyn J. Nagy-Smith
- Chemical Biology Laboratory,
National Cancer Institute, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Scott T. R. Walsh
- Chemical Biology Laboratory,
National Cancer Institute, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Joel P. Schneider
- Chemical Biology Laboratory,
National Cancer Institute, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
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20
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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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21
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Moreira IP, Piskorz TK, van Esch JH, Tuttle T, Ulijn RV. Biocatalytic Self-Assembly of Tripeptide Gels and Emulsions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4986-4995. [PMID: 28463516 DOI: 10.1021/acs.langmuir.7b00428] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report on the biocatalytic activation of a self-assembling (unprotected) tripeptide to stabilize oil-in-water emulsions on-demand. This is achieved by the conversion of a phosphorylated precursor into a hydrogelator using alkaline phosphatase (AP) as the trigger. The rate of conversion, controlled by the amount of enzyme used, is shown to play a key role in dictating the morphology of the nanofibrous networks produced. When these amphiphilic tripeptides are used in biphasic mixtures, nanofibers are shown to self-assemble not only at the aqueous/organic interface but also throughout the surrounding buffer, thereby stabilizing the oil-in-water droplet dispersions. The use of enzymatic activation of tripeptide emulsions gives rise to enhanced control of the emulsification process because emulsions can be stabilized on-demand by simply adding AP. In addition, control over the emulsion stabilization can be achieved by taking advantage of the kinetics of dephosphorylation and consequent formation of different stabilizing nanofibrous networks at the interface and/or in the aqueous environment. This approach can be attractive for various cosmetic, food, or biomedical applications because both tunability of the tripeptide emulsion stability and on-demand stabilization of emulsions can be achieved.
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Affiliation(s)
- Inês P Moreira
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Tomasz K Piskorz
- Department of Chemical Engineering, Delft University of Technology , van der Maasweg, 2629 HZ Delft, The Netherlands
| | - Jan H van Esch
- Department of Chemical Engineering, Delft University of Technology , van der Maasweg, 2629 HZ Delft, The Netherlands
| | - Tell Tuttle
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Rein V Ulijn
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, U.K
- Advanced Science Research Center (ASRC), City University of New York , 85 St Nicholas Terrace, New York, New York 10031, United States
- Department of Chemistry and Biochemistry, City University of New York-Hunter College , 695 Park Avenue, New York, New York 10065, United States
- PhD Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York , New York, New York 10016, United States
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22
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Dou XQ, Feng CL. Amino Acids and Peptide-Based Supramolecular Hydrogels for Three-Dimensional Cell Culture. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1604062. [PMID: 28112836 DOI: 10.1002/adma.201604062] [Citation(s) in RCA: 227] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 10/16/2016] [Indexed: 05/18/2023]
Abstract
Supramolecular hydrogels assembled from amino acids and peptide-derived hydrogelators have shown great potential as biomimetic three-dimensional (3D) extracellular matrices because of their merits over conventional polymeric hydrogels, such as non-covalent or physical interactions, controllable self-assembly, and biocompatibility. These merits enable hydrogels to be made not only by using external stimuli, but also under physiological conditions by rationally designing gelator structures, as well as in situ encapsulation of cells into hydrogels for 3D culture. This review will assess current progress in the preparation of amino acids and peptide-based hydrogels under various kinds of external stimuli, and in situ encapsulation of cells into the hydrogels, with a focus on understanding the associations between their structures, properties, and functions during cell culture, and the remaining challenges in this field. The amino acids and peptide-based hydrogelators with rationally designed structures have promising applications in the fields of regenerative medicine, tissue engineering, and pre-clinical evaluation.
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Affiliation(s)
- Xiao-Qiu Dou
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Road., 200240, Shanghai, China
| | - Chuan-Liang Feng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Road., 200240, Shanghai, China
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23
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Wallace M, Iggo JA, Adams DJ. Probing the surface chemistry of self-assembled peptide hydrogels using solution-state NMR spectroscopy. SOFT MATTER 2017; 13:1716-1727. [PMID: 28165092 DOI: 10.1039/c6sm02404a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The surface chemistry of self-assembled hydrogel fibres - their charge, hydrophobicity and ion-binding dynamics - is recognised to play an important role in determining how the gels develop as well as their suitability for different applications. However, to date there are no established methodologies for the study of this surface chemistry. Here, we demonstrate how solution-state NMR spectroscopy can be employed to measure the surface chemical properties of the fibres in a range of hydrogels formed from N-functionalised dipeptides, an effective and versatile class of gelator that has attracted much attention. By studying the interactions with the gel fibres of a diverse range of probe molecules and ions, we can simultaneously study a number of surface chemical properties of the NMR invisible fibres in an essentially non-invasive manner. Our results yield fresh insights into the materials. Most notably, gel fibres assembled using different tiggering methods bear differing amounts of negative charge as a result of a partial deprotonation of the carboxylic acid groups of the gelators. We also demonstrate how chemical shift imaging (CSI) techniques can be applied to follow the formation of hydrogels along chemical gradients. We apply CSI to study the binding of Ca2+ and subsequent gelation of peptide assemblies at alkaline pH. Using metal ion-binding molecules as probes, we are able to detect the presence of bound Ca2+ ions on the surface of the gel fibres. We briefly explore how knowledge of the surface chemical properties of hydrogels could be used to inform their practical application in fields such as drug delivery and environmental remediation.
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Affiliation(s)
- Matthew Wallace
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
| | - Jonathan A Iggo
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
| | - Dave J Adams
- Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
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24
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Gao J, Tang C, Elsawy MA, Smith AM, Miller AF, Saiani A. Controlling Self-Assembling Peptide Hydrogel Properties through Network Topology. Biomacromolecules 2017; 18:826-834. [DOI: 10.1021/acs.biomac.6b01693] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jie Gao
- School of Materials, ‡Manchester Institute of Biotechnology, and ∥School of Chemical Engineering and
Analytical Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Claire Tang
- School of Materials, ‡Manchester Institute of Biotechnology, and ∥School of Chemical Engineering and
Analytical Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Mohamed A. Elsawy
- School of Materials, ‡Manchester Institute of Biotechnology, and ∥School of Chemical Engineering and
Analytical Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Andrew M. Smith
- School of Materials, ‡Manchester Institute of Biotechnology, and ∥School of Chemical Engineering and
Analytical Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Aline F. Miller
- School of Materials, ‡Manchester Institute of Biotechnology, and ∥School of Chemical Engineering and
Analytical Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Alberto Saiani
- School of Materials, ‡Manchester Institute of Biotechnology, and ∥School of Chemical Engineering and
Analytical Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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25
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De Leon-Rodriguez LM, Hemar Y, Mo G, Mitra AK, Cornish J, Brimble MA. Multifunctional thermoresponsive designer peptide hydrogels. Acta Biomater 2017; 47:40-49. [PMID: 27744067 DOI: 10.1016/j.actbio.2016.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/10/2016] [Accepted: 10/10/2016] [Indexed: 02/07/2023]
Abstract
We report the synthesis and characterization of multifunctional peptides comprised of a hydrogel forming β-sheet peptide segment and a matrix metalloproteinase 2 substrate containing a propargylglycinyl linker that is further derivatized with an RGD peptide sequence via "click" chemistry. In contrast to currently known systems, these multifunctional peptides formed gels that are stiffer than those formed by their respective precursors. All the peptides showed reversible thermoresponsive properties, which render them as suitable lead systems for a variety of possible biomedical applications. STATEMENT OF SIGNIFICANCE In general, it has been frequently observed that chemical biofunctionalization of peptide hydrogels adversely affects peptide assembly, hydrogel formation or mechanical properties, which severely compromises their application. A functionalization protocol that allows to generate peptide hydrogels that display significantly improved mechanical properties over their unfunctionalized counterparts is reported in this work. These peptides also showed thermoresponsive viscoelastic characteristics, including an example of a peptide hydrogel that displays lower critical solution temperature behaviour.
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Affiliation(s)
- Luis M De Leon-Rodriguez
- School of Biological Sciences, The University of Auckland, 3A Symonds St, Thomas Building, Auckland 1010, New Zealand.
| | - Yacine Hemar
- School of Chemical Sciences, The University of Auckland, 23 Symonds St, Auckland 1010, New Zealand
| | - Guang Mo
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Alok K Mitra
- School of Biological Sciences, The University of Auckland, 3A Symonds St, Thomas Building, Auckland 1010, New Zealand
| | - Jillian Cornish
- Department of Medicine, The University of Auckland, Auckland, New Zealand
| | - Margaret A Brimble
- School of Biological Sciences, The University of Auckland, 3A Symonds St, Thomas Building, Auckland 1010, New Zealand; School of Chemical Sciences, The University of Auckland, 23 Symonds St, Auckland 1010, New Zealand.
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26
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Markey A, Workman VL, Bruce IA, Woolford TJ, Derby B, Miller AF, Cartmell SH, Saiani A. Peptide hydrogel in vitro non-inflammatory potential. J Pept Sci 2016; 23:148-154. [PMID: 27990715 PMCID: PMC5324702 DOI: 10.1002/psc.2940] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/20/2016] [Accepted: 10/25/2016] [Indexed: 02/04/2023]
Abstract
Peptide‐based hydrogels have attracted significant interest in recent years as these soft, highly hydrated materials can be engineered to mimic the cell niche with significant potential applications in the biomedical field. Their potential use in vivo in particular is dependent on their biocompatibility, including their potential to cause an inflammatory response. In this work, we investigated in vitro the inflammatory potential of a β‐sheet forming peptide (FEFEFKFK; F: phenylalanine, E: glutamic acid; K: lysine) hydrogel by encapsulating murine monocytes within it (3D culture) and using the production of cytokines, IL‐β, IL‐6 and TNFα, as markers of inflammatory response. No statistically significant release of cytokines in our test sample (media + gel + cells) was observed after 48 or 72 h of culture showing that our hydrogels do not incite a pro‐inflammatory response in vitro. These results show the potential biocompatibility of these hydrogels and therefore their potential for in vivo use. The work also highlighted the difference in monocyte behaviour, proliferation and morphology changes when cultured in 2D vs. 3D. © 2016 The Authors Journal of Peptide Science published by European Peptide Society and John Wiley & Sons Ltd.
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Affiliation(s)
- A Markey
- School of Materials, University of Manchester, Oxford Road M13 9PL, Manchester, UK
| | - V L Workman
- School of Materials, University of Manchester, Oxford Road M13 9PL, Manchester, UK.,Manchester Institute of Biotechnology, University of Manchester, Oxford Road M13 9PL, Manchester, UK
| | - I A Bruce
- Paediatric ENT Department, Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Division of Infection, Immunity and Respiratory Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, M13 9PL, Manchester, UK
| | - T J Woolford
- Department of Otolaryngology-Head & Neck Surgery, Manchester Royal Infirmary, University of Manchester, Oxford Road, Manchester, M13 9WL
| | - B Derby
- School of Materials, University of Manchester, Oxford Road M13 9PL, Manchester, UK
| | - A F Miller
- Manchester Institute of Biotechnology, University of Manchester, Oxford Road M13 9PL, Manchester, UK.,School of Chemical Engineering and Analytical Science, University of Manchester, Oxford Road, M13 9PL, Manchester, UK
| | - S H Cartmell
- School of Materials, University of Manchester, Oxford Road M13 9PL, Manchester, UK
| | - A Saiani
- School of Materials, University of Manchester, Oxford Road M13 9PL, Manchester, UK.,Manchester Institute of Biotechnology, University of Manchester, Oxford Road M13 9PL, Manchester, UK
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27
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Pugliese R, Gelain F. Peptidic Biomaterials: From Self-Assembling to Regenerative Medicine. Trends Biotechnol 2016; 35:145-158. [PMID: 27717599 DOI: 10.1016/j.tibtech.2016.09.004] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 09/07/2016] [Accepted: 09/13/2016] [Indexed: 11/29/2022]
Abstract
Peptidic biomaterials represent a particularly exciting topic in regenerative medicine. Peptidic scaffolds can be specifically designed for biomimetic customization for targeted therapy. The field is at a pivotal point where preclinical research is being translated into clinics, so it is crucial to understand the theory and describe the status of this rapidly developing technology. In this review, we highlight major advantages and current limitations of self-assembling peptide-based biomaterials, and we discuss the most widely used classes of assembling peptides, describing recent and promising approaches in tissue engineering, drug delivery, and clinics. We also suggest design strategies and hurdles that still need to be overcome to fully exploit their therapeutic potential.
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Affiliation(s)
- Raffaele Pugliese
- IRCCS Casa Sollievo della Sofferenza, Opera di San Pio da Pietrelcina, Viale Cappuccini, 1, 71013 San Giovanni Rotondo (FG), Italy
| | - Fabrizio Gelain
- IRCCS Casa Sollievo della Sofferenza, Opera di San Pio da Pietrelcina, Viale Cappuccini, 1, 71013 San Giovanni Rotondo (FG), Italy; Center for Nanomedicine and Tissue Engineering (CNTE), A. O. Ospedale Niguarda Cà Granda, Piazza dell' Ospedale Maggiore 3, 20162 Milan, Italy.
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28
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Head DA, Tronci G, Russell SJ, Wood DJ. In Silico Modeling of the Rheological Properties of Covalently Cross-Linked Collagen Triple Helices. ACS Biomater Sci Eng 2016; 2:1224-1233. [DOI: 10.1021/acsbiomaterials.6b00115] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David A. Head
- School
of Computing, University of Leeds, Leeds LS2 9JT, U.K
| | - Giuseppe Tronci
- Nonwovens
Research Group, School of Design, University of Leeds, Leeds LS2 9JT, U.K
- Biomaterials
and Tissue Engineering Research Group, School of Dentistry, St. James’s
University Hospital, University of Leeds, Leeds LS9 7TF, U.K
| | - Stephen J. Russell
- Nonwovens
Research Group, School of Design, University of Leeds, Leeds LS2 9JT, U.K
| | - David J. Wood
- Biomaterials
and Tissue Engineering Research Group, School of Dentistry, St. James’s
University Hospital, University of Leeds, Leeds LS9 7TF, U.K
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29
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Elsawy M, Smith AM, Hodson N, Squires A, Miller AF, Saiani A. Modification of β-Sheet Forming Peptide Hydrophobic Face: Effect on Self-Assembly and Gelation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4917-23. [PMID: 27089379 PMCID: PMC4990315 DOI: 10.1021/acs.langmuir.5b03841] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
β-Sheet forming peptides have attracted significant interest for the design of hydrogels for biomedical applications. One of the main challenges is the control and understanding of the correlations between peptide molecular structure, the morphology, and topology of the fiber and network formed as well as the macroscopic properties of the hydrogel obtained. In this work, we have investigated the effect that functionalizing these peptides through their hydrophobic face has on their self-assembly and gelation. Our results show that the modification of the hydrophobic face results in a partial loss of the extended β-sheet conformation of the peptide and a significant change in fiber morphology from straight to kinked. As a consequence, the ability of these fibers to associate along their length and form large bundles is reduced. These structural changes (fiber structure and network topology) significantly affect the mechanical properties of the hydrogels (shear modulus and elasticity).
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Affiliation(s)
- Mohamed
A. Elsawy
- School of Materials, Manchester Institute of Biotechnology, BioAFM Facility, Stopford
Building, and School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
| | - Andrew M. Smith
- School of Materials, Manchester Institute of Biotechnology, BioAFM Facility, Stopford
Building, and School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
| | - Nigel Hodson
- School of Materials, Manchester Institute of Biotechnology, BioAFM Facility, Stopford
Building, and School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
| | - Adam Squires
- Department
of Chemistry, Reading University, Whiteknights RG6 6AD, Reading, U.K.
| | - Aline F. Miller
- School of Materials, Manchester Institute of Biotechnology, BioAFM Facility, Stopford
Building, and School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
| | - Alberto Saiani
- School of Materials, Manchester Institute of Biotechnology, BioAFM Facility, Stopford
Building, and School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, M13
9PL Manchester, U.K.
- Phone +44
161 306 5981; Fax +44 161 306 3586; e-mail (A.S.)
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30
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Rizzi LG, Auer S, Head DA. Importance of non-affine viscoelastic response in disordered fibre networks. SOFT MATTER 2016; 12:4332-4338. [PMID: 27079274 DOI: 10.1039/c6sm00139d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Disordered fibre networks are ubiquitous in nature and have a wide range of industrial applications as novel biomaterials. Predicting their viscoelastic response is straightforward for affine deformations that are uniform over all length scales, but when affinity fails, as has been observed experimentally, modelling becomes challenging. Here we present a numerical methodology, related to an existing framework for amorphous packings, to predict the steady-state viscoelastic spectra and degree of affinity for disordered fibre networks driven at arbitrary frequencies. Applying this method to a peptide gel model reveals a monotonic increase of the shear modulus as the soft, non-affine normal modes are successively suppressed as the driving frequency increases. In addition to being dominated by fibril bending, these low frequency network modes are also shown to be delocalised. The presented methodology provides insights into the importance of non-affinity in the viscoelastic response of peptide gels, and is easily extendible to all types of fibre networks.
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Affiliation(s)
- L G Rizzi
- Departamento de Física, Universidade Federal de Viçosa, 36570-900, Viçosa, Brazil and School of Chemistry, University of Leeds, LS2 9JT, Leeds, UK
| | - S Auer
- School of Chemistry, University of Leeds, LS2 9JT, Leeds, UK
| | - D A Head
- School of Computing, University of Leeds, LS2 9JT, Leeds, UK.
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31
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Sun Y, Li W, Wu X, Zhang N, Zhang Y, Ouyang S, Song X, Fang X, Seeram R, Xue W, He L, Wu W. Functional Self-Assembling Peptide Nanofiber Hydrogels Designed for Nerve Degeneration. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2348-59. [PMID: 26720334 DOI: 10.1021/acsami.5b11473] [Citation(s) in RCA: 147] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Self-assembling peptide (SAP) RADA16-I (Ac-(RADA)4-CONH2) has been suffering from a main drawback associated with low pH, which damages cells and host tissues upon direct exposure. In this study, we presented a strategy to prepare nanofiber hydrogels from two designer SAPs at neutral pH. RADA16-I was appended with functional motifs containing cell adhesion peptide RGD and neurite outgrowth peptide IKVAV. The two SAPs were specially designed to have opposite net charges at neutral pH, the combination of which created a nanofiber hydrogel (-IKVAV/-RGD) characterized by significantly higher G' than G″ in a viscoelasticity examination. Circular dichroism, Fourier transform infrared spectroscopy, and Raman measurements were performed to investigate the secondary structure of the designer SAPs, indicating that both the hydrophobic/hydrophilic properties and electrostatic interactions of the functional motifs play an important role in the self-assembling behavior of the designer SAPs. The neural progenitor cells (NPCs)/stem cells (NSCs) fully embedded in the 3D-IKVAV/-RGD nanofiber hydrogel survived, whereas those embedded within the RADA 16-I hydrogel hardly survived. Moreover, the -IKVAV/-RGD nanofiber hydrogel supported NPC/NSC neuron and astrocyte differentiation in a 3D environment without adding extra growth factors. Studies of three nerve injury models, including sciatic nerve defect, intracerebral hemorrhage, and spinal cord transection, indicated that the designer -IKVAV/-RGD nanofiber hydrogel provided a more permissive environment for nerve regeneration than the RADA 16-I hydrogel. Therefore, we reported a new mechanism that might be beneficial for the synthesis of SAPs for in vitro 3D cell culture and nerve regeneration.
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Affiliation(s)
- Yuqiao Sun
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong, 510632, China
| | - Wen Li
- School of Biomedical Science, LKS Faculty of Medicine, The University of Hong Kong , Pokfulam, Hong Kong SAR, 000000, PR China
| | - Xiaoli Wu
- School of Biomedical Science, LKS Faculty of Medicine, The University of Hong Kong , Pokfulam, Hong Kong SAR, 000000, PR China
| | - Na Zhang
- Guangdong-Hongkong-Macau Institute of CNS Regeneration (GHMICR), Jinan University , Guangzhou, Guangdong, 510632, China
| | - Yongnu Zhang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong, 510632, China
| | - Songying Ouyang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing 100101, China
| | - Xiyong Song
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences , Beijing 100101, China
| | - Xinyu Fang
- School of Biomedical Science, LKS Faculty of Medicine, The University of Hong Kong , Pokfulam, Hong Kong SAR, 000000, PR China
| | - Ramakrishna Seeram
- Guangdong-Hongkong-Macau Institute of CNS Regeneration (GHMICR), Jinan University , Guangzhou, Guangdong, 510632, China
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore , Singapore , 117576
| | - Wei Xue
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong, 510632, China
| | - Liumin He
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, College of Life Science and Technology, Jinan University , Guangzhou, Guangdong, 510632, China
- School of Biomedical Science, LKS Faculty of Medicine, The University of Hong Kong , Pokfulam, Hong Kong SAR, 000000, PR China
| | - Wutian Wu
- School of Biomedical Science, LKS Faculty of Medicine, The University of Hong Kong , Pokfulam, Hong Kong SAR, 000000, PR China
- Guangdong-Hongkong-Macau Institute of CNS Regeneration (GHMICR), Jinan University , Guangzhou, Guangdong, 510632, China
- State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong , Pokfulam, Hong Kong SAR, 000000, PR China
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32
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Mangelschots J, Bibian M, Gardiner J, Waddington L, Van Wanseele Y, Van Eeckhaut A, Acevedo MMD, Van Mele B, Madder A, Hoogenboom R, Ballet S. Mixed α/β-Peptides as a Class of Short Amphipathic Peptide Hydrogelators with Enhanced Proteolytic Stability. Biomacromolecules 2016; 17:437-45. [DOI: 10.1021/acs.biomac.5b01319] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - James Gardiner
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton, VIC 3169, Australia
| | - Lynne Waddington
- CSIRO Manufacturing
Flagship, Bayview Avenue, Clayton, VIC 3169, Australia
| | - Yannick Van Wanseele
- Department
of Pharmaceutical Chemistry and Drug Analysis, Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090 Brussels, Belgium
| | - Ann Van Eeckhaut
- Department
of Pharmaceutical Chemistry and Drug Analysis, Vrije Universiteit Brussel, Laarbeeklaan 103, B-1090 Brussels, Belgium
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33
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Biomechanical Analysis of Infectious Biofilms. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 915:99-114. [PMID: 27193540 DOI: 10.1007/978-3-319-32189-9_8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The removal of infectious biofilms from tissues or implanted devices and their transmission through fluid transport systems depends in part of the mechanical properties of their polymeric matrix. Linking the various physical and chemical microscopic interactions to macroscopic deformation and failure modes promises to unveil design principles for novel therapeutic strategies targeting biofilm eradication, and provide a predictive capability to accelerate the development of devices, water lines, etc, that minimise microbial dispersal. Here, our current understanding of biofilm mechanics is appraised from the perspective of biophysics , with an emphasis on constitutive modelling that has been highly successful in soft matter. Fitting rheometric data to viscoelastic models has quantified linear and nonlinear stress relaxation mechanisms, how they vary between species and environments, and how candidate chemical treatments alter the mechanical response. The rich interplay between growth, mechanics and hydrodynamics is just becoming amenable to computational modelling and promises to provide unprecedented characterisation of infectious biofilms in their native state.
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34
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De Leon Rodriguez LM, Hemar Y, Cornish J, Brimble MA. Structure–mechanical property correlations of hydrogel forming β-sheet peptides. Chem Soc Rev 2016; 45:4797-824. [DOI: 10.1039/c5cs00941c] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review discusses about β-sheet peptide structure at the molecular level and the bulk mechanical properties of the corresponding hydrogels.
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Affiliation(s)
| | - Yacine Hemar
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- The Riddet Institute
| | - Jillian Cornish
- Department of Medicine
- The University of Auckland
- Auckland
- New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery
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35
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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: 1258] [Impact Index Per Article: 139.8] [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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36
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Fu IW, Nguyen HD. Sequence-Dependent Structural Stability of Self-Assembled Cylindrical Nanofibers by Peptide Amphiphiles. Biomacromolecules 2015; 16:2209-19. [DOI: 10.1021/acs.biomac.5b00595] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Iris W. Fu
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
| | - Hung D. Nguyen
- Department
of Chemical Engineering
and Materials Science, University of California, Irvine, Irvine, California 92697, United States
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37
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Micklitsch CM, Medina SH, Yucel T, Nagy-Smith KJ, Pochan DJ, Schneider JP. Influence of Hydrophobic Face Amino Acids on the Hydrogelation of β-Hairpin Peptide Amphiphiles. Macromolecules 2015; 48:1281-1288. [PMID: 33223568 DOI: 10.1021/ma5024796] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Hydrophobic residues provide much of the thermodynamic driving force for the folding, self-assembly, and consequent hydrogelation of amphiphilic β-hairpin peptides. We investigate how the identity of hydrophobic side chains displayed from the hydrophobic face of these amphiphilic peptides influences their behavior to expound on the design criteria important to gel formation. Six peptides were designed that globally incorporate valine, aminobutyric acid, norvaline, norleucine, phenylalanine, or isoleucine on the hydrophobic face of the hairpin to study how systematic changes in hydrophobic content, β-sheet propensity, and aromaticity affect gelation. Circular dichroism (CD) spectroscopy indicates that hydrophobic content, rather than β-sheet propensity, dictates the temperature- and pH-dependent folding and assembly behavior of these peptides. Transmission electron microscopy (TEM) and small-angle neutron scattering (SANS) show that the local morphology of the fibrils formed via self-assembly is little affected by amino acid type. However, residue type does influence the propensity of peptide fibrils to undergo higher order assembly events. Oscillatory rheology shows that the mechanical rigidity of the peptide gels is highly influenced by residue type, but there is no apparent correlation between rigidity and residue hydrophobicity nor β-sheet propensity. Lastly, the large planar aromatic side chain of phenylalanine supports hairpin folding and assembly, affording a gel characterized by a rate of formation and storage modulus similar to the parent valine-containing peptide.
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Affiliation(s)
- Christopher M Micklitsch
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Scott H Medina
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21701, United States
| | - Tuna Yucel
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Katelyn J Nagy-Smith
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States.,Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21701, United States
| | - Darrin J Pochan
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Joel P Schneider
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21701, United States
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38
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Nieuwland M, van Gijzel N, van Hest JCM, Löwik DWPM. The influence of amino acid sequence on structure and morphology of polydiacetylene containing peptide fibres. SOFT MATTER 2015; 11:1335-1344. [PMID: 25574953 DOI: 10.1039/c4sm02241f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A systematic study was performed on the influence of charge and steric hindrance on the assembly into fibres of a series of pentameric peptides based on the well-known β-sheet forming sequence Gly-Ala-Gly-Ala-Gly, which were N-terminally acylated with pentacosadiynoic acid. To investigate the effect of steric hindrance and charge repulsion on the fibre structure, either the N-terminal or the C-terminal amino acid in the sequence was replaced by a glutamic acid or lysine residue. Furthermore, peptide amphiphiles (PAs) with an amide or a free acid group at the C-terminus were compared. Steric hindrance and charge repulsion were addressed individually by varying the pH during and after fibre preparation. The self-assembled structures were examined with circular dichroism (CD) spectroscopy and transmission electron microscopy (TEM). UV spectroscopy was used to probe the diacetylene packing in the hydrophobic tail, both by polymerisation behaviour and chromatic properties of the polymers. In brief, the assembly was hindered more if the modification was close to the alkyl tail, and glutamic acid brought about a larger effect than lysine. PAs with two charges yielded assemblies which after polymerisation were found to be the most susceptible towards changes in pH, behaving as a colour-based pH sensor. Typically, TEM and UV showed the same trends, indicating that a distorted morphology as observed with TEM is indicative of a poorer molecular packing of the peptide amphiphile fibres, probed via the changes in absorption of the polydiacetylene backbone.
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Affiliation(s)
- Maaike Nieuwland
- Radboud University Nijmegen, Institute for Molecules and Materials, Bio-organic Chemistry, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands.
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39
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Ruggeri FS, Byrne C, Khemtemourian L, Ducouret G, Dietler G, Jacquot Y. Concentration-dependent and surface-assisted self-assembly properties of a bioactive estrogen receptor α-derived peptide. J Pept Sci 2014; 21:95-104. [PMID: 25530026 DOI: 10.1002/psc.2730] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 11/25/2014] [Accepted: 11/28/2014] [Indexed: 11/10/2022]
Abstract
We have synthesized a 17-mer peptide (ERα17p) that is issued from the hinge region of the estrogen receptor α and which activates the proliferation of breast carcinoma cells in steroid-deprived conditions. In the present paper, we show that at a concentration of ~50 μM, it rapidly forms amyloid-like fibrils with the assistance of electrostatic interactions and that at higher concentrations, it spontaneously forms a hydrogel. By using biophysical, spectral and rheological techniques, we have explored the structural, biophysical and mechanical characteristics of ERα17p with respect to fibril formation and gelation.
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Affiliation(s)
- Francesco Simone Ruggeri
- Laboratoire de Physique de la Matière Vivante, Institut de Physique des Systèmes Biologiques, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland
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40
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Sonmez C, Nagy KJ, Schneider JP. Design of self-assembling peptide hydrogelators amenable to bacterial expression. Biomaterials 2014; 37:62-72. [PMID: 25453938 DOI: 10.1016/j.biomaterials.2014.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 10/02/2014] [Indexed: 12/26/2022]
Abstract
Hydrogels formed from self-assembling peptides are finding use in tissue engineering and drug delivery applications. Given the notorious difficulties associated with producing self-assembling peptides by recombinant expression, most are typically prepared by chemical synthesis. Herein, we report the design of a family of self-assembling β-hairpin peptides amenable to efficient production using an optimized bacterial expression system. Expressing peptides, EX1, EX2 and EX3 contain identical eight-residue amphiphilic β-strands connected by varying turn sequences that are responsible for ensuring chain reversal and the proper intramolecular folding and consequent self-assembly of the peptide into a hydrogel network under physiological conditions. EX1 was initially used to establish and optimize the bacterial expression system by which all the peptides could be eventually individually expressed. Expression clones were designed to allow exploration of possible fusion partners and investigate both enzymatic and chemical cleavage as means to liberate the target peptide. A systematic analysis of possible expression systems followed by fermentation optimization lead to a system in which all three peptides could be expressed as fusions with BAD-BH3, the BH3 domain of the proapoptotic BAD (Bcl-2 Associated Death) Protein. CNBr cleavage followed by purification afforded 50, 31, and 15 mg/L yields of pure EX1, EX2 and EX3, respectively. CD spectroscopy, TEM, and rheological analysis indicate that these peptides fold and assembled into well-defined fibrils that constitute hydrogels having shear-thin/recovery properties.
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Affiliation(s)
- Cem Sonmez
- National Cancer Institute, Center for Cancer Research, Frederick, MD 21701, United States; University of Delaware, Department of Chemistry and Biochemistry, Newark, DE 19716, United States
| | - Katelyn J Nagy
- National Cancer Institute, Center for Cancer Research, Frederick, MD 21701, United States; University of Delaware, Department of Chemistry and Biochemistry, Newark, DE 19716, United States
| | - Joel P Schneider
- National Cancer Institute, Center for Cancer Research, Frederick, MD 21701, United States.
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41
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Maslovskis A, Guilbaud JB, Grillo I, Hodson N, Miller AF, Saiani A. Self-assembling peptide/thermoresponsive polymer composite hydrogels: effect of peptide-polymer interactions on hydrogel properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10471-80. [PMID: 25095719 DOI: 10.1021/la502358b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We have investigated the effect of doping the self-assembling octapeptide FEFEFKFK (F, phenylalanine; E, glutamic acid; K, lysine) hydrogels with various amounts of thermoresponsive conjugate of FEFEFKFK and poly(N-isopropylacrylamide) (PNIPAAm) in order to create novel hydrogels. The samples were characterized using a range of techniques including microdifferential scanning calorimetry (μDSC), oscillatory rheology, transmission electron microscopy (TEM), atomic force microscopy (AFM), and small angle neutron scattering (SANS). The peptide from the conjugate was shown to be incorporated into the peptide fiber, resulting in the polymer being anchored to the peptide fiber. The conjugation of the polymer to the peptide and its anchoring to the peptide fibers did not affect its lower critical solution temperature (LCST). On the other hand, it did result in a decrease in the LCST enthalpy and a significant increase in the G' of the hydrogels, suggesting the presence of hydrogen bond interactions between the peptide and the polymer. As a result, the polymer was found to adopt a fibrillar arrangement tightly covering the peptide fiber. The polymer was still found to go through a conformational change at the LCST, suggesting that it collapses onto the peptide fiber. On the other hand, the fibrillar network was found to be mainly unaffected by the polymer LCST. These changes at the LCST were also found to be fully reversible. The nature of the interaction between the polymer and the peptide was shown to have a significant effect on the conformation adopted by the polymer around the fibers and the mechanical properties of the hydrogels.
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Affiliation(s)
- A Maslovskis
- Manchester Institute of Biotechnology and School of Chemical Engineering & Analytical Science, The University of Manchester , Oxford Road, Manchester, M13 9PL, U.K
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Fu IW, Markegard CB, Chu BK, Nguyen HD. Role of hydrophobicity on self-assembly by peptide amphiphiles via molecular dynamics simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7745-7754. [PMID: 24915982 DOI: 10.1021/la5012988] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using a novel coarse-grained model, large-scale molecular dynamics simulations were performed to examine self-assembly of 800 peptide amphiphiles (sequence palmitoyl-V3A3E3). Under suitable physiological conditions, these molecules readily assemble into nanofibers leading to hydrogel construction as observed in experiments. Our simulations capture this spontaneous self-assembly process, including formation of secondary structure, to identify morphological transitions of distinctive nanostructures. As the hydrophobic interaction is increased, progression from open networks of secondary structures toward closed cylindrical nanostructures containing either β-sheets or random coils are observed. Moreover, temperature effects are also determined to play an important role in regulating formation of secondary structures within those nanostructures. These understandings of the molecular interactions involved and the role of environmental factors on hydrogel formation provide useful insight for development of innovative smart biomaterials for biomedical applications.
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Affiliation(s)
- Iris W Fu
- Department of Chemical Engineering and Materials Science, University of California-Irvine , Irvine, California 92697, United States
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Szkolar L, Guilbaud JB, Miller AF, Gough JE, Saiani A. Enzymatically triggered peptide hydrogels for 3D cell encapsulation and culture. J Pept Sci 2014; 20:578-84. [DOI: 10.1002/psc.2666] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 05/12/2014] [Accepted: 05/15/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Laura Szkolar
- School of Materials; The University of Manchester; Manchester M13 9PL UK
- Manchester Institute of Biotechnology; The University of Manchester; Manchester M13 9PL UK
| | - Jean-Baptiste Guilbaud
- School of Chemical Engineering and Analytical Sciences; The University of Manchester; Manchester M13 9PL UK
- Manchester Institute of Biotechnology; The University of Manchester; Manchester M13 9PL UK
| | - Aline F. Miller
- School of Chemical Engineering and Analytical Sciences; The University of Manchester; Manchester M13 9PL UK
- Manchester Institute of Biotechnology; The University of Manchester; Manchester M13 9PL UK
| | - Julie E. Gough
- School of Materials; The University of Manchester; Manchester M13 9PL UK
| | - Alberto Saiani
- School of Materials; The University of Manchester; Manchester M13 9PL UK
- Manchester Institute of Biotechnology; The University of Manchester; Manchester M13 9PL UK
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Hickling C, Toogood HS, Saiani A, Scrutton NS, Miller AF. Nanofibrillar Peptide hydrogels for the immobilization of biocatalysts for chemical transformations. Macromol Rapid Commun 2014; 35:868-74. [PMID: 24604676 PMCID: PMC4316184 DOI: 10.1002/marc.201400027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Indexed: 01/12/2023]
Abstract
Enzymes are attractive, "green" alternatives to chemical catalysts within the industrial sector, but their robustness to environmental conditions needs optimizing. Here, an enzyme is tagged chemically and recombinantly with a self-assembling peptide that allows the conjugate to spontaneously assemble with pure peptide to form β-sheet-rich nanofibers decorated with tethered enzyme. Above a critical concentration, these fibers entangle and form a 3D hydrogel. The immobilized enzyme catalyzes chemical transformations and critically its stability is increased significantly where it retains activity after exposure to high temperatures (90 °C) and long storage times (up to 12 months).
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Affiliation(s)
- Christopher Hickling
- School of Chemical Engineering and Analytical Science, Manchester Institute of Biotechnology, University of Manchester131 Princess Street, Manchester, M1, 7DN, UK
| | - Helen S Toogood
- Manchester Institute of Biotechnology, Faculty of Life Sciences131 Princess Street, Manchester, M1, 7DN, UK
| | - Alberto Saiani
- Manchester Institute of Biotechnology, School of Materials, University of ManchesterManchester, M1, 3 9PL, UK
| | - Nigel S Scrutton
- Manchester Institute of Biotechnology, Faculty of Life Sciences131 Princess Street, Manchester, M1, 7DN, UK
| | - Aline F Miller
- School of Chemical Engineering and Analytical Science, Manchester Institute of Biotechnology, University of Manchester131 Princess Street, Manchester, M1, 7DN, UK
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Tang C, Miller AF, Saiani A. Peptide hydrogels as mucoadhesives for local drug delivery. Int J Pharm 2014; 465:427-35. [DOI: 10.1016/j.ijpharm.2014.02.039] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 02/21/2014] [Accepted: 02/21/2014] [Indexed: 10/25/2022]
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Boothroyd S, Saiani A, Miller AF. Controlling network topology and mechanical properties of co-assembling peptide hydrogels. Biopolymers 2014; 101:669-80. [DOI: 10.1002/bip.22435] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Stephen Boothroyd
- Manchester Institute of Biotechnology and School of Chemical Engineering & Analytical Science; University of Manchester; 131 Princess Street, Manchester M1 7DN UK
| | - Alberto Saiani
- School of Materials Science; University of Manchester; Grosvenor Street, Manchester M1 7HS UK
| | - Aline F. Miller
- Manchester Institute of Biotechnology and School of Chemical Engineering & Analytical Science; University of Manchester; 131 Princess Street, Manchester M1 7DN UK
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Head DA, Briels WJ, Gompper G. Nonequilibrium structure and dynamics in a microscopic model of thin-film active gels. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:032705. [PMID: 24730872 DOI: 10.1103/physreve.89.032705] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Indexed: 06/03/2023]
Abstract
In the presence of adenosine triphosphate, molecular motors generate active force dipoles that drive suspensions of protein filaments far from thermodynamic equilibrium, leading to exotic dynamics and pattern formation. Microscopic modeling can help to quantify the relationship between individual motors plus filaments to organization and dynamics on molecular and supramolecular length scales. Here, we present results of extensive numerical simulations of active gels where the motors and filaments are confined between two infinite parallel plates. Thermal fluctuations and excluded-volume interactions between filaments are included. A systematic variation of rates for motor motion, attachment, and detachment, including a differential detachment rate from filament ends, reveals a range of nonequilibrium behavior. Strong motor binding produces structured filament aggregates that we refer to as asters, bundles, or layers, whose stability depends on motor speed and differential end detachment. The gross features of the dependence of the observed structures on the motor rate and the filament concentration can be captured by a simple one-filament model. Loosely bound aggregates exhibit superdiffusive mass transport, where filament translocation scales with lag time with nonunique exponents that depend on motor kinetics. An empirical data collapse of filament speed as a function of motor speed and end detachment is found, suggesting a dimensional reduction of the relevant parameter space. We conclude by discussing the perspectives of microscopic modeling in the field of active gels.
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Affiliation(s)
- D A Head
- School of Computing, Leeds University, Leeds LS2 9JT, United Kingdom
| | - W J Briels
- Computational Biophysics, University of Twente, 7500 AE Enschede, The Netherlands
| | - Gerhard Gompper
- Theoretical Soft Matter and Biophysics, Institute of Complex Systems and Institute for Advanced Simulation, Forschungszentrum Jülich, 52425 Jülich, Germany
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Piluso S, Cassell HC, Gibbons JL, Waller TE, Plant NJ, Miller AF, Cavalli G. Site-specific, covalent incorporation of Tus, a DNA-binding protein, on ionic-complementary self-assembling peptide hydrogels using transpeptidase Sortase A as a conjugation tool†Dedicated to the memory of Joachim H. G. Steinke.‡Electronic supplementary information (ESI) available: Further experimental data. See DOI: 10.1039/c3sm00131hClick here for additional data file. SOFT MATTER 2013; 9:6752-6756. [PMID: 23847687 PMCID: PMC3705885 DOI: 10.1039/c3sm00131h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 02/27/2013] [Indexed: 06/02/2023]
Abstract
The site-specific conjugation of DNA-binding protein (Tus) to self-assembling peptide FEFEFKFKK was demonstrated. Rheology studies and TEM of the corresponding hydrogels (including PNIPAAm-containing systems) showed no significant variation in properties and hydrogel morphology compared to FEFEFKFKK. Critically, we demonstrate that Tus is accessible within the gel network displaying DNA-binding properties.
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Affiliation(s)
- Susanna Piluso
- Department of Chemistry , University of Surrey , Guildford , GU2 7XH , UK . ; Tel: +44 (0)1483 686837
| | - Heather C. Cassell
- Department of Biochemistry and Physiology , University of Surrey , Guildford , GU2 7XH , UK . ; Tel: +44 (0)1483 686412
| | - Jonathan L. Gibbons
- Manchester Institute of Biotechnology , School of Chemical Engineering & Analytical Science , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK . ; Tel: +44 (0)161 3065781
| | - Thomas E. Waller
- Department of Chemistry , University of Surrey , Guildford , GU2 7XH , UK . ; Tel: +44 (0)1483 686837
| | - Nick J. Plant
- Department of Biochemistry and Physiology , University of Surrey , Guildford , GU2 7XH , UK . ; Tel: +44 (0)1483 686412
| | - Aline F. Miller
- Manchester Institute of Biotechnology , School of Chemical Engineering & Analytical Science , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK . ; Tel: +44 (0)161 3065781
| | - Gabriel Cavalli
- Department of Chemistry , University of Surrey , Guildford , GU2 7XH , UK . ; Tel: +44 (0)1483 686837
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Head DA, Mizuno D. Local mechanical response in semiflexible polymer networks subjected to an axisymmetric prestress. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 88:022717. [PMID: 24032874 DOI: 10.1103/physreve.88.022717] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 07/12/2013] [Indexed: 06/02/2023]
Abstract
Analytical and numerical calculations are presented for the mechanical response of fiber networks in a state of axisymmetric prestress, in the limit where geometric nonlinearities such as fiber rotation are negligible. This allows us to focus on the anisotropy deriving purely from the nonlinear force-extension curves of individual fibers. The number of independent elastic coefficients for isotropic, axisymmetric, and fully anisotropic networks are enumerated before deriving expressions for the response to a locally applied force that can be tested against, e.g., microrheology experiments. Localized forces can generate anisotropy away from the point of application, so numerical integration of nonlinear continuum equations is employed to determine the stress field, and induced mechanical anisotropy, at points located directly behind and in front of a force monopole. Results are presented for the wormlike chain model in normalized forms, allowing them to be easily mapped to a range of systems. Finally, the relevance of these findings to naturally occurring systems and directions for future investigation are discussed.
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Affiliation(s)
- David A Head
- School of Computing, Leeds University, Leeds LS2 9JT, United Kingdom
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Hamley IW, Dehsorkhi A, Castelletto V. Coassembly in binary mixtures of peptide amphiphiles containing oppositely charged residues. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5050-9. [PMID: 23534557 DOI: 10.1021/la400163q] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The self-assembly in water of designed peptide amphiphile (PA) C16-ETTES containing two anionic residues and its mixtures with C16-KTTKS containing two cationic residues has been investigated. Multiple spectroscopy, microscopy, and scattering techniques are used to examine ordering extending from the β-sheet structures up to the fibrillar aggregate structure. The peptide amphiphiles both comprise a hexadecyl alkyl chain and a charged pentapeptide headgroup containing two charged residues. For C16-ETTES, the critical aggregation concentration was determined by fluorescence experiments. FTIR and CD spectroscopy were used to examine β-sheet formation. TEM revealed highly extended tape nanostructures with some striped regions corresponding to bilayer structures viewed edge-on. Small-angle X-ray scattering showed a main 5.3 nm bilayer spacing along with a 3 nm spacing. These spacings are assigned respectively to predominant hydrated bilayers and a fraction of dehydrated bilayers. Signs of cooperative self-assembly are observed in the mixtures, including reduced bundling of peptide amphiphile aggregates (extended tape structures) and enhanced β-sheet formation.
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Affiliation(s)
- I W Hamley
- School of Chemistry, Pharmacy and Food Biosciences, University of Reading, Reading, UK
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