1
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Ciulla MG, Marchini A, Gazzola J, Forouharshad M, Pugliese R, Gelain F. In Situ Transglutaminase Cross-Linking Improves Mechanical Properties of Self-Assembling Peptides for Biomedical Applications. ACS APPLIED BIO MATERIALS 2024; 7:1723-1734. [PMID: 38346174 DOI: 10.1021/acsabm.3c01148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The development of three-dimensional (3D) biomaterials that mimic natural tissues is required for efficiently restoring physiological functions of injured tissues and organs. In the field of soft hydrogels, self-assembled peptides (SAPs) stand out as distinctive biomimetic scaffolds, offering tunable properties. They have garnered significant attention in nanomedicine due to their innate ability to self-assemble, resulting in the creation of fibrous nanostructures that closely mimic the microenvironment of the extracellular matrix (ECM). This unique feature ensures their biocompatibility and bioactivity, making them a compelling area of study over the past few decades. As they are soft hydrogels, approaches are necessary to enhance the stiffness and resilience of the SAP materials. This work shows an enzymatic strategy to selectively increase the stiffness and resiliency of functionalized SAPs using transglutaminase (TGase) type 2, an enzyme capable of triggering the formation of isopeptide bonds. To this aim, we synthesized a set of SAP sequences and characterized their cross-linking via rheological experiments, atomic force microscopy (AFM), thioflavin-T binding assay, and infrared spectroscopy (ATR-FTIR) tests. The results showed an improvement of the storage modulus of cross-linked SAPs at no cost of the maximum stress-at-failure. Further, in in vitro tests, we examined and validated the TGase capability to cross-link SAPs without hampering seeded neural stem cells (hNSCs) viability and differentiation, potentially leaving the door open for safe in situ cross-linking reactions in vivo.
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Affiliation(s)
- Maria Gessica Ciulla
- Institute for Stem-Cell Biology, Regenerative Medicine and Innovative Therapies, IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
| | - Amanda Marchini
- Institute for Stem-Cell Biology, Regenerative Medicine and Innovative Therapies, IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
- Center for Nanomedicine and Tissue Engineering (CNTE), ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy
| | - Jacopo Gazzola
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, 20125 Milan, Italy
| | - Mahdi Forouharshad
- Institute for Stem-Cell Biology, Regenerative Medicine and Innovative Therapies, IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
- Center for Nanomedicine and Tissue Engineering (CNTE), ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy
| | - Raffaele Pugliese
- Center for Nanomedicine and Tissue Engineering (CNTE), ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy
| | - Fabrizio Gelain
- Institute for Stem-Cell Biology, Regenerative Medicine and Innovative Therapies, IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo, Italy
- Center for Nanomedicine and Tissue Engineering (CNTE), ASST Grande Ospedale Metropolitano Niguarda, 20162 Milan, Italy
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2
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Natarajan A, Vadrevu LR, Rangan K. DRGD-linked charged EKKE dimeric dodecapeptide: pH-based amyloid nanostructures and their application in lead and uranium binding. RSC Adv 2024; 14:9200-9217. [PMID: 38505393 PMCID: PMC10949120 DOI: 10.1039/d3ra08261j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/04/2024] [Indexed: 03/21/2024] Open
Abstract
Peptides have been reported to undergo self-assembly into diverse nanostructures, influenced by several parameters, including their amino acid sequence, pH, charge, solvent, and temperature. Inspired by natural systems, researchers have developed biomimetic peptides capable of self-assembling into supramolecular functional structures. The present study explored a newly designed peptide sequence, EKKEDRGDEKKE, where E = glutamic acid, K = lysine, D = aspartic acid, G = glycine, and R = arginine, with a metal binding DRGD sequence incorporated between the exclusively charged EKKE peptide. We investigated the formation and the potential of the EKKEDRGDEKKE peptide in retaining the structure and morphology adopted by the individual EKKE peptide. According to a combination of experimental techniques such as thioflavin T fluorescence, field emission-scanning electron microscopy, atomic force microscopy, and circular dichroism, it was evident that the EKKEDRGDEKKE peptide displayed a pH-dependent propensity to adopt amyloid-like structures. Furthermore, the self-assembled entities formed under acidic, basic, and neutral conditions exhibited morphological variations, which resembled that observed for the exclusively charged EKKE peptide. Furthermore, the incorporation of the functional DRGD motif resulted in promising binding to two toxic metal ions, lead (Pb) and uranium (U), as evidenced by a range of spectroscopic techniques, including UV-visible spectroscopy, atomic absorption spectroscopy, fluorescence spectroscopy, and X-ray photoelectron spectroscopy. The use of the amyloid-forming EKKEDRGDEKKE scaffold can also be extended to potential biomedical applications.
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Affiliation(s)
- Aishwarya Natarajan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
| | - Late Ramakrishna Vadrevu
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus Jawahar Nagar Hyderabad 500 078 Telangana India
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3
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Enyedi KN, Basa B, Mező G, Lajkó E. Photoinduced Hydrogel-Forming Caged Peptides with Improved Solubility. ACS OMEGA 2024; 9:6894-6900. [PMID: 38371799 PMCID: PMC10870261 DOI: 10.1021/acsomega.3c08289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 12/14/2023] [Accepted: 01/18/2024] [Indexed: 02/20/2024]
Abstract
Self-assembling peptides are attractive alternatives in the field of biomaterial science due to their variability and biocompatibility. Unfortunately, such peptides have poor solubility, and their purification, synthesis, and overall handling are challenging. Our main objective was to develop a cage peptide design with full control over self-assembly. Theoretically, aggregation can be suppressed by temporally masking the amino acid side chains at critical positions. Taking into account several biological and synthetic requirements, a photosensitive protecting group, p-hydroxy-phenacyl (pHP), was chosen as the "masking" moiety. To test our theory, EAK16-II was chosen as a model self-assembling peptide, and a caged derivative containing photosensitive pHP groups was synthesized. Both spectroscopic and in vitro experiments on A2058 melanoma cells confirmed our hypothesis that the caged-EAK16-II peptide has good solubility and that the hydrogel formed after photolysis results in similar viability and cell aggregate formation of melanoma cells as the native EAK16-II-based hydrogel.
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Affiliation(s)
- Kata N. Enyedi
- Faculty
of Science, Institute of Chemistry, Department of Organic Chemistry, Eötvös Loránd University, Pázmány Péter
sétány 1/A, 1117 Budapest, Hungary
- HUN-REN-ELTE
Research Group of Peptide Chemistry, Eötvös
Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Bettina Basa
- Faculty
of Science, Institute of Chemistry, Department of Organic Chemistry, Eötvös Loránd University, Pázmány Péter
sétány 1/A, 1117 Budapest, Hungary
- HUN-REN-ELTE
Research Group of Peptide Chemistry, Eötvös
Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Gábor Mező
- Faculty
of Science, Institute of Chemistry, Department of Organic Chemistry, Eötvös Loránd University, Pázmány Péter
sétány 1/A, 1117 Budapest, Hungary
- HUN-REN-ELTE
Research Group of Peptide Chemistry, Eötvös
Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Eszter Lajkó
- Department
of Genetics, Cell- and Immunobiology, Semmelweis
University, Nagyvárad tér 4, 1089 Budapest, Hungary
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4
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Emamyari S, Mirzaei M, Mohammadinejad S, Fazli D, Fazli H. Impact of flexibility on the aggregation of polymeric macromolecules. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2023; 46:66. [PMID: 37522950 DOI: 10.1140/epje/s10189-023-00324-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 07/17/2023] [Indexed: 08/01/2023]
Abstract
Dependence of the dimerization probability and the aggregation behavior of polymeric macromolecules on their flexibility is studied using Langevin dynamics simulations. It is found that the dimerization probability is a non-monotonic function of the polymers persistence length. For a given value of inter-polymer attraction strength, semiflexible polymers have lower dimerization probability relative to flexible and rigid polymers of the same length. The threshold temperature of the formation of aggregates in a many-polymer system and its dependence on the polymers persistence length is also investigated. The simulation results of two- and many-polymer systems are in good agreement and show how the amount of flexibility affects the dimerization and the aggregation behaviors of polymeric macromolecules.
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Affiliation(s)
- Soheila Emamyari
- Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Yousef Sobouti Blvd., Zanjan, 45137-66731, Iran
| | - Masoud Mirzaei
- Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Yousef Sobouti Blvd., Zanjan, 45137-66731, Iran
| | - Sarah Mohammadinejad
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Yousef Sobouti Blvd., Zanjan, 45137-66731, Iran
| | - Davood Fazli
- Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Yousef Sobouti Blvd., Zanjan, 45137-66731, Iran
| | - Hossein Fazli
- Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Yousef Sobouti Blvd., Zanjan, 45137-66731, Iran.
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Yousef Sobouti Blvd., Zanjan, 45137-66731, Iran.
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5
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Natarajan A, Rangan K, Vadrevu R. Self-assembly of a peptide sequence, EKKE, composed of exclusively charged amino acids: Role of charge in morphology and lead binding. J Pept Sci 2023; 29:e3451. [PMID: 36098076 DOI: 10.1002/psc.3451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/14/2022] [Accepted: 09/08/2022] [Indexed: 01/12/2023]
Abstract
The self-assembly of peptides is influenced by their amino acid sequence and other factors including pH, charge, temperature, and solvent. Herein, we explore whether a four-residue sequence, EKKE, consisting of exclusively charged amino acids shows the propensity to form self-assembled ordered nanostructures and whether the overall charge plays any role in morphological and functional properties. From a combination of experimental data provided by Thioflavin T fluorescence, Congo red absorbance, circular dichroism spectroscopy, dynamic light scattering, field emission-scanning electron microscopy, atomic force microscopy, and confocal microscopy, it is clear that the all-polar peptide and charged EKKE sequence shows a pH-dependent tendency to form amyloid-like structures, and the self-assembled entities under acidic, basic and neutral conditions exhibit morphological variation. Additionally, the ability of the self-assembled amyloid nanostructures to bind to the toxic metal, lead (Pb2+ ), was demonstrated from the analysis of the ultraviolet absorbance and X-ray photoelectron spectroscopy data. The modulation at the sequence level for the amyloid-forming EKKE scaffold can further extend its potential role not only in the remediation of other toxic metals but also towards biomedical applications.
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Affiliation(s)
- Aishwarya Natarajan
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, India
| | - Ramakrishna Vadrevu
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, Hyderabad Campus, Hyderabad, India
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6
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Shi T, Sun M, Lu C, Meng F. Self-assembled nanoparticles: A new platform for revolutionizing therapeutic cancer vaccines. Front Immunol 2023; 14:1125253. [PMID: 36895553 PMCID: PMC9988954 DOI: 10.3389/fimmu.2023.1125253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 02/07/2023] [Indexed: 02/23/2023] Open
Abstract
Cancer vaccines have had some success in the past decade. Based on in-depth analysis of tumor antigen genomics, many therapeutic vaccines have already entered clinical trials for multiple cancers, including melanoma, lung cancer, and head and neck squamous cell carcinoma, which have demonstrated impressive tumor immunogenicity and antitumor activity. Recently, vaccines based on self-assembled nanoparticles are being actively developed as cancer treatment, and their feasibility has been confirmed in both mice and humans. In this review, we summarize recent therapeutic cancer vaccines based on self-assembled nanoparticles. We describe the basic ingredients for self-assembled nanoparticles, and how they enhance vaccine immunogenicity. We also discuss the novel design method for self-assembled nanoparticles that pose as a promising delivery platform for cancer vaccines, and the potential in combination with multiple therapeutic approaches.
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Affiliation(s)
- Tianyu Shi
- The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Mengna Sun
- The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Changchang Lu
- The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Fanyan Meng
- The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.,The Comprehensive Cancer Centre of Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
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7
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Chotera‐Ouda A, Jeziorna A, Kaźmierski S, Dolot R, Dudek MK, Potrzebowski MJ. “Crystal memory” Affects the Properties of Peptide Hydrogels – The Case of the Cyclic Tyr‐Tyr dipeptide. Chemistry 2022; 28:e202202005. [DOI: 10.1002/chem.202202005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Indexed: 12/23/2022]
Affiliation(s)
- Agata Chotera‐Ouda
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland
| | - Agata Jeziorna
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland
- Lodz Institute of Technology Łukasiewicz Research Network M. Sklodowskiej-Curie 19/27 90-570 Lodz Poland
| | - Sławomir Kaźmierski
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland
| | - Rafał Dolot
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland
| | - Marta K. Dudek
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland
| | - Marek J. Potrzebowski
- Centre of Molecular and Macromolecular Studies Polish Academy of Sciences Sienkiewicza 112 90-363 Lodz Poland
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8
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Yuan SC, Lewis JA, Sai H, Weigand SJ, Palmer LC, Stupp SI. Peptide Sequence Determines Structural Sensitivity to Supramolecular Polymerization Pathways and Bioactivity. J Am Chem Soc 2022; 144:16512-16523. [PMID: 36049084 DOI: 10.1021/jacs.2c05759] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pathways in supramolecular polymerization traverse different regions of the system's energy landscape, affecting not only their architectures and internal structure but also their functions. We report here on the effects of pathway selection on polymerization for two isomeric peptide amphiphile monomers with amino acid sequences AAEE and AEAE. We subjected the monomers to five different pathways that varied in the order they were exposed to electrostatic screening by electrolytes and thermal annealing. We found that introducing electrostatic screening of E residues before annealing led to crystalline packing of AAEE monomers. Electrostatic screening decreased intermolecular repulsion among AAEE monomers thus promoting internal order within the supramolecular polymers, while subsequent annealing brought them closer to thermodynamic equilibrium with enhanced β-sheet secondary structure. In contrast, supramolecular polymerization of AEAE monomers was less pathway dependent, which we attribute to side-chain dimerization. Regardless of the pathway, the internal structure of AEAE nanostructures had limited internal order and moderate β-sheet structure. These supramolecular polymers generated hydrogels with lower porosity and greater bulk mechanical strength than those formed by the more cohesive AAEE polymers. The combination of dynamic, less ordered internal structure and bulk strength of AEAE networks promoted strong cell-material interactions in adherent epithelial-like cells, evidenced by increased cytoskeletal remodeling and cell spreading. The highly ordered AAEE nanostructures formed porous hydrogels with inferior bulk mechanical properties and weaker cell-material interactions. We conclude that pathway sensitivity in supramolecular synthesis, and therefore structure and function, is highly dependent on the nature of dominant interactions driving polymerization.
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Affiliation(s)
- Shelby C Yuan
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States.,Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Jacob A Lewis
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States.,Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Hiroaki Sai
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States.,Center for Bio-Inspired Energy Science, Northwestern University, Evanston, Illinois 60208, United States
| | - Steven J Weigand
- DuPont-Northwestern-Dow Collaborative Access Team Synchrotron Research Center, Northwestern University, Advanced Photon Source/Argonne National Laboratory 432-A004, Argonne, Illinois 60439, United States
| | - Liam C Palmer
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States.,Center for Bio-Inspired Energy Science, Northwestern University, Evanston, Illinois 60208, United States.,Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Samuel I Stupp
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States.,Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States.,Center for Bio-Inspired Energy Science, Northwestern University, Evanston, Illinois 60208, United States.,Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.,Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States.,Department of Medicine, Northwestern University, Chicago, Illinois 60611, United States
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9
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Zhang Q, Liu Y, Xie T, Shang-guan Y, Tian M, Zhang Q, Cao M. Sulfate ion-triggered self-assembly transitions of amphiphilic short peptides by force balance adjustment. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Chen H, Cai X, Cheng J, Wang S. Self-assembling peptides: Molecule-nanostructure-function and application on food industry. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.12.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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11
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La Manna S, Di Natale C, Onesto V, Marasco D. Self-Assembling Peptides: From Design to Biomedical Applications. Int J Mol Sci 2021; 22:12662. [PMID: 34884467 PMCID: PMC8657556 DOI: 10.3390/ijms222312662] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/15/2021] [Accepted: 11/19/2021] [Indexed: 12/20/2022] Open
Abstract
Self-assembling peptides could be considered a novel class of agents able to harvest an array of micro/nanostructures that are highly attractive in the biomedical field. By modifying their amino acid composition, it is possible to mime several biological functions; when assembled in micro/nanostructures, they can be used for a variety of purposes such as tissue regeneration and engineering or drug delivery to improve drug release and/or stability and to reduce side effects. Other significant advantages of self-assembled peptides involve their biocompatibility and their ability to efficiently target molecular recognition sites. Due to their intrinsic characteristics, self-assembled peptide micro/nanostructures are capable to load both hydrophobic and hydrophilic drugs, and they are suitable to achieve a triggered drug delivery at disease sites by inserting in their structure's stimuli-responsive moieties. The focus of this review was to summarize the most recent and significant studies on self-assembled peptides with an emphasis on their application in the biomedical field.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy;
| | - Concetta Di Natale
- Istituto Italiano di Tecnologia, IIT@CRIB, Largo Barsanti e Matteucci, 53, 80125 Napoli, Italy
- Centro di Ricerca Interdipartimentale sui Biomateriali CRIB, Università di Napoli Federico II, Piazzale Tecchio, 80, 80125 Napoli, Italy
| | - Valentina Onesto
- Institute of Nanotechnology, Consiglio Nazionale delle Ricerche, CNR NANOTEC, via Monteroni, c/o Campus Ecotekne, 73100 Lecce, Italy;
| | - Daniela Marasco
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy;
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12
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SERS Investigation on Oligopeptides Used as Biomimetic Coatings for Medical Devices. Biomolecules 2021; 11:biom11070959. [PMID: 34209793 PMCID: PMC8301923 DOI: 10.3390/biom11070959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/14/2021] [Accepted: 06/24/2021] [Indexed: 11/22/2022] Open
Abstract
The surface-enhanced Raman scattering (SERS) spectra of three amphiphilic oligopeptides derived from EAK16 (AEAEAKAK)2 were examined to study systematic amino acid substitution effects on the corresponding interaction with Ag colloidal nanoparticles. Such self-assembling molecular systems, known as “molecular Lego”, are of particular interest for their uses in tissue engineering and as biomimetic coatings for medical devices because they can form insoluble macroscopic membranes under physiological conditions. Spectra were collected for both native and gamma-irradiated samples. Quantum mechanical data on two of the examined oligopeptides were also obtained to clarify the assignment of the prominent significative bands observed in the spectra. In general, the peptide–nanoparticles interaction occurs through the COO− groups, with the amide bond and the aliphatic chain close to the colloid surface. After gamma irradiation, mimicking a free oxidative radical attack, the SERS spectra of the biomaterials show that COO− groups still provide the main peptide–nanoparticle interactions. However, the spatial arrangement of the peptides is different, exhibiting a systematic decrease in the distance between aliphatic chains and colloid nanoparticles.
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13
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Armen JM, Schueller NR, Velankar KY, Abraham N, Palchesko RN, Fan Y, Meng WS, Gawalt ES. Chemically-Induced Cross-Linking of Peptidic Fibrils for Scaffolding Polymeric Particles and Macrophages. Macromol Biosci 2021; 21:e2000350. [PMID: 33502824 DOI: 10.1002/mabi.202000350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/04/2021] [Indexed: 11/11/2022]
Abstract
EAK16-II (EAK) is a self-assembling peptide (SAP) that forms β-sheets and β-fibrils through ionic-complementary interactions at physiological ionic strengths. The soft materials can be injected in vivo, creating depots of drugs and cells for rendering pharmacological and biological actions. The scope of the applications of EAK is sought to extend to tissues through which the flow of extracellular fluid tends to be limited. In such anatomical locales the rate and extent of the fibrilization are limited insofar as drug delivery and cellular scaffolding would be impeded. A method is generated utilizing a carbodiimide cross-linker by which EAK fibrils are pre-assembled yet remain injectable soft materials. It is hypothesized that the resulting de novo covalent linkages enhance the stacking of the β-sheet bilayers, thereby increasing the lengths of the fibrils and the extent of their cross-linking, as evidenced in Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectroscopy, scanning electron microscopy, and atomic force microscopy analyses. The cross-linked EAK (clEAK) retains polymeric microspheres with an average diameter of 1 µm. Macrophages admixed with clEAK remain viable and do not produce the inflammatory mediator interleukin-1β. These results indicate that clEAK should be investigated further as a platform for delivering particles and cells in vivo.
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Affiliation(s)
- Jennifer M Armen
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA, 15282, USA
| | - Nathan R Schueller
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, 15282, USA.,University of Pittsburgh, Pittsburgh, PA, 15212, USA
| | - Ketki Y Velankar
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, 15282, USA.,University of Pittsburgh, Pittsburgh, PA, 15212, USA
| | - Nevil Abraham
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, 15282, USA.,University of Pittsburgh, Pittsburgh, PA, 15212, USA
| | - Rachelle N Palchesko
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.,Louis J. Fox Center for Vision Restoration, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Yong Fan
- Cellular Therapeutics Institute, Allegheny-Singer Research Institute, Allegheny Health Network, Pittsburgh, PA, 15202, USA.,The Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
| | - Wilson S Meng
- The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, 15212, USA.,Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA, 15282, USA.,University of Pittsburgh, Pittsburgh, PA, 15212, USA
| | - Ellen S Gawalt
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA, 15282, USA.,The McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, 15212, USA
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14
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Arad E, Green H, Jelinek R, Rapaport H. Revisiting thioflavin T (ThT) fluorescence as a marker of protein fibrillation - The prominent role of electrostatic interactions. J Colloid Interface Sci 2020; 573:87-95. [PMID: 32272300 DOI: 10.1016/j.jcis.2020.03.075] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 03/07/2020] [Accepted: 03/21/2020] [Indexed: 12/25/2022]
Abstract
Thioflavin T (ThT), a benzothiazole-based fluorophore, is a prominent dye widely employed for monitoring amyloid fibril assembly. Despite the near-universal presumption that ThT binds to β-sheet domains upon fibrillar surface via hydrophobic forces, the contribution of the positive charge of ThT to fibril binding and concomitant fluorescence enhancement have not been thoroughly assessed. Here we demonstrate a considerable interdependence between ThT fluorescence and electrostatic charges of peptide fibrils. Specifically, by analyzing both fibril-forming synthetic peptides and prominent natural fibrillar peptides, we demonstrate pronounced modulations of ThT fluorescence signal that were solely dependent upon electrostatic interactions between ThT and peptide surface. The results further attest to the fact that fibril ζ-potential rather than pH-dependent assembly of the fibrils constitute the primary factor affecting ThT binding and fluorescence. This study provides the first quantitative assessment of electrostatically driven ThT fluorescence upon adsorption to amyloid fibrils.
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Affiliation(s)
- Elad Arad
- Ilse Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; Department of Chemistry, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel
| | - Hodaya Green
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel
| | - Raz Jelinek
- Ilse Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; Department of Chemistry, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel.
| | - Hanna Rapaport
- Ilse Katz Institute for Nanoscale Science and Technology, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel; Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben Gurion University of the Negev, Beer Sheva 8410501, Israel.
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15
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Jeong WJ, Bu J, Han Y, Drelich AJ, Nair A, Král P, Hong S. Nanoparticle Conjugation Stabilizes and Multimerizes β-Hairpin Peptides To Effectively Target PD-1/PD-L1 β-Sheet-Rich Interfaces. J Am Chem Soc 2020; 142:1832-1837. [DOI: 10.1021/jacs.9b10160] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | | | | | | | | | | | - Seungpyo Hong
- Yonsei Frontier Lab, Department of Pharmacy, Yonsei University, Seoul 03722, Republic of Korea
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16
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Calvanese L, Brun P, Messina GML, Russo T, Zamuner A, Falcigno L, D’Auria G, Gloria A, Vitagliano L, Marletta G, Dettin M. EAK Hydrogels Cross-Linked by Disulfide Bonds: Cys Number and Position Are Matched to Performances. ACS Biomater Sci Eng 2019; 6:1154-1164. [DOI: 10.1021/acsbiomaterials.9b01556] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Luisa Calvanese
- CIRPeB, University of Naples Federico II, Via Mezzocannone 16, 80134 Naples, Italy
| | - Paola Brun
- Department of Molecular Medicine, University of Padua, Via Gabelli 63, 35121 Padua, Italy
| | - Grazia M. L. Messina
- Department of Chemical Sciences, University of Catania, Via A. Doria 6, 95125 Catania, Italy
| | - Teresa Russo
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, Viale J.F. Kennedy 54−Mostra d’Oltremare PAD. 20, 80125 Naples, Italy
| | - Annj Zamuner
- Department of Industrial Engineering, University of Padua, Via Marzolo 9, 35131 Padua, Italy
| | - Lucia Falcigno
- Department of Pharmacy, University of Naples “Federico II”, Via Mezzocannone 16, 80134 Naples, Italy
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy
| | - Gabriella D’Auria
- Department of Pharmacy, University of Naples “Federico II”, Via Mezzocannone 16, 80134 Naples, Italy
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy
| | - Antonio Gloria
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, Viale J.F. Kennedy 54−Mostra d’Oltremare PAD. 20, 80125 Naples, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging-CNR, Via Mezzocannone 16, 80134 Naples, Italy
| | - Giovanni Marletta
- Department of Chemical Sciences, University of Catania, Via A. Doria 6, 95125 Catania, Italy
| | - Monica Dettin
- Department of Industrial Engineering, University of Padua, Via Marzolo 9, 35131 Padua, Italy
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17
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Yadav N, Chauhan MK, Chauhan VS. Short to ultrashort peptide-based hydrogels as a platform for biomedical applications. Biomater Sci 2019; 8:84-100. [PMID: 31696870 DOI: 10.1039/c9bm01304k] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Short peptides have attracted significant attention from researchers in the past few years due to their easy design, synthesis and characterization, diverse functionalisation possibilities, low cost, possibility to make a large range of hierarchical nanostructures and most importantly their high biocompatibility and biodegradability. Generally, short peptides are also relatively more stable than their longer variants, non-immunogenic in nature and many of them self-assemble to provide an exciting range of nanostructures, including hydrogels. Thus, the development of short peptide-based hydrogels has become an area of intense investigation. Although these hydrogels have a water content of greater than 90%, they are surprisingly highly stable structures, and thus have been used for various biomedical applications, including cell therapeutics, drug delivery, tissue engineering and regeneration, contact lenses, biosensors, and wound healing, by different researchers. Herein, we review the progress of research in the rapidly expanding field of short to ultrashort peptide-based hydrogels and their possible applications. Special attention is paid to address and review this field with regard to the stability of peptide-based hydrogels, particularly to enzymatic degradation.
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Affiliation(s)
- Nitin Yadav
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi-110067, India. and Delhi Institute of Pharmaceutical Sciences and Research, Mehrauli-Badarpur Road, Sector-3, Pushpvihar, New Delhi-110017, India
| | - Meenakshi K Chauhan
- Delhi Institute of Pharmaceutical Sciences and Research, Mehrauli-Badarpur Road, Sector-3, Pushpvihar, New Delhi-110017, India
| | - Virander S Chauhan
- Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi-110067, India.
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18
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Emamyari S, Fazli H. Single-Chain Conformational Characteristics of Comb-Like Polyelectrolytes: Molecular Dynamics Simulation Study. Macromol Res 2018. [DOI: 10.1007/s13233-019-7010-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Hainline KM, Gu F, Handley JF, Tian YF, Wu Y, de Wet L, Vander Griend DJ, Collier JH. Self-Assembling Peptide Gels for 3D Prostate Cancer Spheroid Culture. Macromol Biosci 2018; 19:e1800249. [PMID: 30324687 DOI: 10.1002/mabi.201800249] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/13/2018] [Indexed: 12/11/2022]
Abstract
Progress in prostate cancer research is presently limited by a shortage of reliable in vitro model systems. The authors describe a novel self-assembling peptide, bQ13, which forms nanofibers and gels useful for the 3D culture of prostate cancer spheroids, with improved cytocompatibility compared to related fibrillizing peptides. The mechanical properties of bQ13 gels can be controlled by adjusting peptide concentration, with storage moduli ranging between 1 and 10 kPa. bQ13's ability to remain soluble at mildly basic pH considerably improved the viability of encapsulated cells compared to other self-assembling nanofiber-forming peptides. LNCaP cells formed spheroids in bQ13 gels with similar morphologies and sizes to those formed in Matrigel or RADA16-I. Moreover, prostate-specific antigen (PSA) is produced by LNCaP cells in all matrices, and PSA production is more responsive to enzalutamide treatment in bQ13 gels than in other fibrillized peptide gels. bQ13 represents an attractive platform for further tailoring within 3D cell culture systems.
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Affiliation(s)
- Kelly M Hainline
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Fangqi Gu
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Jacqueline F Handley
- Department of Surgery, Section of Urology, University of Chicago, Chicago, IL, 60637, USA
| | - Ye F Tian
- Department of Surgery, Section of Urology, University of Chicago, Chicago, IL, 60637, USA
| | - Yaoying Wu
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Larischa de Wet
- Department of Surgery, Section of Urology, University of Chicago, Chicago, IL, 60637, USA
| | - Donald J Vander Griend
- Department of Surgery, Section of Urology, University of Chicago, Chicago, IL, 60637, USA
| | - Joel H Collier
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
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20
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Forte G, Messina G, Zamuner A, Dettin M, Grassi A, Marletta G. Surface-driven first-step events of nanoscale self-assembly for molecular peptide fibers: An experimental and theoretical study. Colloids Surf B Biointerfaces 2018; 168:148-155. [DOI: 10.1016/j.colsurfb.2018.01.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 12/13/2017] [Accepted: 01/13/2018] [Indexed: 01/20/2023]
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21
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RNA extraction from self-assembling peptide hydrogels to allow qPCR analysis of encapsulated cells. PLoS One 2018; 13:e0197517. [PMID: 29864116 PMCID: PMC5986125 DOI: 10.1371/journal.pone.0197517] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 05/03/2018] [Indexed: 12/21/2022] Open
Abstract
Self-assembling peptide hydrogels offer a novel 3-dimensional platform for many applications in cell culture and tissue engineering but are not compatible with current methods of RNA isolation; owing to interactions between RNA and the biomaterial. This study investigates the use of two techniques based on two different basic extraction principles: solution-based extraction and direct solid-state binding of RNA respectively, to extract RNA from cells encapsulated in four β-sheet forming self-assembling peptide hydrogels with varying net positive charge. RNA-peptide fibril interactions, rather than RNA-peptide molecular complexing, were found to interfere with the extraction process resulting in low yields. A column-based approach relying on RNA-specific binding was shown to be more suited to extracting RNA with higher purity from these peptide hydrogels owing to its reliance on strong specific RNA binding interactions which compete directly with RNA-peptide fibril interactions. In order to reduce the amount of fibrils present and improve RNA yields a broad spectrum enzyme solution-pronase-was used to partially digest the hydrogels before RNA extraction. This pre-treatment was shown to significantly increase the yield of RNA extracted, allowing downstream RT-qPCR to be performed.
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22
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He B, Zhao J, Ou Y, Jiang D. Biofunctionalized peptide nanofiber-based composite scaffolds for bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:728-738. [PMID: 29853144 DOI: 10.1016/j.msec.2018.04.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 04/15/2018] [Accepted: 04/19/2018] [Indexed: 12/21/2022]
Abstract
Bone tissue had moderate self-healing capabilities, but biomaterial scaffolds were required for the repair of some defects such as large bone defects. Peptide nanofiber scaffolds demonstrated important potential in regenerative medicine. Functional modification and controlled release of signal molecules were two significant approaches to increase the bioactivity of biofunctionalized peptide nanofiber scaffolds, but peptide scaffolds were limited by insufficient mechanical strength. Thus, it was necessary to combine peptide scaffolds with other materials including polymers, hydroxyapatite, demineralized bone matrix (DBM) and metal materials based on the requirement of different bone defects. As the development of peptide-based composite scaffolds continued to evolve, ultimate translation to the clinical environment may allow for improved therapeutic outcomes for bone repair.
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Affiliation(s)
- Bin He
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Jinqiu Zhao
- Department of Infectious Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Yunsheng Ou
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
| | - Dianming Jiang
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
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23
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Seoudi RS, Mechler A. Design Principles of Peptide Based Self-Assembled Nanomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1030:51-94. [DOI: 10.1007/978-3-319-66095-0_4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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24
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Recent advances in self-assembled peptides: Implications for targeted drug delivery and vaccine engineering. Adv Drug Deliv Rev 2017; 110-111:169-187. [PMID: 27356149 DOI: 10.1016/j.addr.2016.06.013] [Citation(s) in RCA: 223] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 06/10/2016] [Accepted: 06/21/2016] [Indexed: 11/20/2022]
Abstract
Self-assembled peptides have shown outstanding characteristics for vaccine delivery and drug targeting. Peptide molecules can be rationally designed to self-assemble into specific nanoarchitectures in response to changes in their assembly environment including: pH, temperature, ionic strength, and interactions between host (drug) and guest molecules. The resulting supramolecular nanostructures include nanovesicles, nanofibers, nanotubes, nanoribbons, and hydrogels and have a diverse range of mechanical and physicochemical properties. These molecules can be designed for cell-specific targeting by including adhesion ligands, receptor recognition ligands, or peptide-based antigens in their design, often in a multivalent display. Depending on their design, self-assembled peptide nanostructures have advantages in biocompatibility, stability against enzymatic degradation, encapsulation of hydrophobic drugs, sustained drug release, shear-thinning viscoelastic properties, and/or adjuvanting properties. These molecules can also act as intracellular transporters and respond to changes in the physiological environment. Furthermore, this class of materials has shown sequence- and structure-dependent impacts on the immune system that can be tailored to non-immunogenic for drug targeting, and immunogenic for vaccine delivery. This review explores self-assembled peptide nanostructures (beta sheets, alpha helices, peptide amphiphiles, amino acid pairing, elastin like polypeptides, cyclic peptides, short peptides, Fmoc peptides, and peptide hydrogels) and their application in vaccine delivery and drug targeting.
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25
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Karsai A, Slack TJ, Malekan H, Khoury F, Lin WF, Tran V, Cox D, Toney M, Chen X, Liu GY. Local Mechanical Perturbation Provides an Effective Means to Regulate the Growth and Assembly of Functional Peptide Fibrils. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:6407-6415. [PMID: 27689936 DOI: 10.1002/smll.201601657] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/30/2016] [Indexed: 06/06/2023]
Abstract
Mucin 1 (MUC1) peptide fused with Q11 (MUC1-Q11) having 35 residues has previously been shown to form amyloid fibrils. Using time-dependent and high-resolution atomic force microscopy (AFM) imaging, it is revealed that the formation of individual MUC1-Q11 fibrils entails nucleation and extension at both ends. This process can be altered by local mechanical perturbations using AFM probes. This work reports two specific perturbations and outcomes. First, by increasing load while maintaining tip-surface contact, the fibrils are cut during the scan due to shearing. Growth of fibrils occurs at the newly exposed termini, following similar mechanism of the MUC1-Q11 nucleation growth. As a result, branched fibrils are seen on the surface whose orientation and length can be controlled by the nuclei orientation and reaction time. In contrast to the "one-time-cut", fibrils can be continuously fragmented by modulation at sufficiently high amplitude. As a result, short and highly branched fibrils accumulate and pile on surfaces. Since the fibril formation and assembly of MUC1-Q11 can be impacted by local mechanical force, this approach offers a nonchemical and label-free means to control the presentation of MUC1 epitopes, and has promising application in MUC1 fibril-based immunotherapy.
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Affiliation(s)
- Arpad Karsai
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Teri Jo Slack
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Hamed Malekan
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Fadi Khoury
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Wei-Feng Lin
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Victoria Tran
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Daniel Cox
- Department of Physics, University of California, Davis, CA, 95616, USA
| | - Michael Toney
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Xi Chen
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Gang-Yu Liu
- Department of Chemistry, University of California, Davis, CA, 95616, USA
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26
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Tajima A, Liu W, Pradhan I, Bertera S, Lakomy RA, Rudert WA, Trucco M, Meng WS, Fan Y. Promoting 3-D Aggregation of FACS Purified Thymic Epithelial Cells with EAK 16-II/EAKIIH6 Self-assembling Hydrogel. J Vis Exp 2016. [PMID: 27404995 DOI: 10.3791/54062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Thymus involution, associated with aging or pathological insults, results in diminished output of mature T-cells. Restoring the function of a failing thymus is crucial to maintain effective T cell-mediated acquired immune response against invading pathogens. However, thymus regeneration and revitalization proved to be challenging, largely due to the difficulties of reproducing the unique 3D microenvironment of the thymic stroma that is critical for the survival and function of thymic epithelial cells (TECs). We developed a novel hydrogel system to promote the formation of TEC aggregates, based on the self-assembling property of the amphiphilic EAK16-II oligopeptides and its histidinylated analogue EAKIIH6. TECs were enriched from isolated thymic cells with density-gradient, sorted with fluorescence-activated cell sorting (FACS), and labeled with anti-epithelial cell adhesion molecule (EpCAM) antibodies that were anchored, together with anti-His IgGs, on the protein A/G adaptor complexes. Formation of cell aggregates was promoted by incubating TECs with EAKIIH6 and EAK16-II oligopeptides, and then by increasing the ionic concentration of the medium to initiate gelation. TEC aggregates embedded in EAK hydrogel can effectively promote the development of functional T cells in vivo when transplanted into the athymic nude mice.
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Affiliation(s)
- Asako Tajima
- Institute of Cellular Therapeutics, Allegheny Health Network
| | - Wen Liu
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University
| | - Isha Pradhan
- Institute of Cellular Therapeutics, Allegheny Health Network
| | - Suzanne Bertera
- Institute of Cellular Therapeutics, Allegheny Health Network
| | - Robert A Lakomy
- Institute of Cellular Therapeutics, Allegheny Health Network
| | | | - Massimo Trucco
- Institute of Cellular Therapeutics, Allegheny Health Network; Department of Biological Sciences, Carnegie Mellon University
| | - Wilson S Meng
- Division of Pharmaceutical Sciences, Mylan School of Pharmacy, Duquesne University
| | - Yong Fan
- Institute of Cellular Therapeutics, Allegheny Health Network; Department of Biological Sciences, Carnegie Mellon University;
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27
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Kumar VA, Wang BK, Kanahara SM. Rational design of fiber forming supramolecular structures. Exp Biol Med (Maywood) 2016; 241:899-908. [PMID: 27022140 PMCID: PMC4950345 DOI: 10.1177/1535370216640941] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 02/24/2016] [Indexed: 12/28/2022] Open
Abstract
Recent strides in the development of multifunctional synthetic biomimetic materials through the self-assembly of multi-domain peptides and proteins over the past decade have been realized. Such engineered systems have wide-ranging application in bioengineering and medicine. This review focuses on fundamental fiber forming α-helical coiled-coil peptides, peptide amphiphiles, and amyloid-based self-assembling peptides; followed by higher order collagen- and elastin-mimetic peptides with an emphasis on chemical / biological characterization and biomimicry.
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Affiliation(s)
| | | | - Satoko M Kanahara
- Department of Internal Medicine, Baylor College of Medicine, Houston, TX 77030, USA
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28
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Liu W, Saunders MJ, Bagia C, Freeman EC, Fan Y, Gawalt ES, Waggoner AS, Meng WS. Local retention of antibodies in vivo with an injectable film embedded with a fluorogen-activating protein. J Control Release 2016; 230:1-12. [PMID: 27038493 DOI: 10.1016/j.jconrel.2016.03.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 02/25/2016] [Accepted: 03/22/2016] [Indexed: 11/17/2022]
Abstract
Herein we report an injectable film by which antibodies can be localized in vivo. The system builds upon a bifunctional polypeptide consisting of a fluorogen-activating protein (FAP) and a β-fibrillizing peptide (βFP). The FAP domain generates fluorescence that reflects IgG binding sites conferred by Protein A/G (pAG) conjugated with the fluorogen malachite green (MG). A film is generated by mixing these proteins with molar excess of EAK16-II, a βFP that forms β-sheet fibrils at high salt concentrations. The IgG-binding, fluorogenic film can be injected in vivo through conventional needled syringes. Confocal microscopic images and dose-response titration experiments showed that loading of IgG into the film was mediated by pAG(MG) bound to the FAP. Release of IgG in vitro was significantly delayed by the bioaffinity mechanism; 26% of the IgG were released from films embedded with pAG(MG) after five days, compared to close to 90% in films without pAG(MG). Computational simulations indicated that the release rate of IgG is governed by positive cooperativity due to pAG(MG). When injected into the subcutaneous space of mouse footpads, film-embedded IgG were retained locally, with distribution through the lymphatics impeded. The ability to track IgG binding sites and distribution simultaneously will aid the optimization of local antibody delivery systems.
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Affiliation(s)
- Wen Liu
- Division of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Matthew J Saunders
- Molecular Biosensor and Imaging Center and Carnegie Mellon University, Pittsburgh, PA 15213, United States; Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, United States
| | - Christina Bagia
- Division of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Eric C Freeman
- College of Engineering, University of Georgia, Athens, GA 30602, United States
| | - Yong Fan
- Institute of Cellular Therapeutics, Allegheny-Singer Research Institute, Pittsburgh, PA 15212, United States; Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, United States
| | - Ellen S Gawalt
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282, United States; McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15213, United States
| | - Alan S Waggoner
- Molecular Biosensor and Imaging Center and Carnegie Mellon University, Pittsburgh, PA 15213, United States; Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213, United States
| | - Wilson S Meng
- Division of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States.
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29
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Lin Z, Zhao Q, Xing L, Zhou B, Wang X. Aggregating tags for column-free protein purification. Biotechnol J 2015; 10:1877-86. [PMID: 26556016 DOI: 10.1002/biot.201500299] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/27/2015] [Accepted: 10/14/2015] [Indexed: 12/30/2022]
Abstract
Protein purification remains a central need for biotechnology. In recent years, a class of aggregating tags has emerged, which offers a quick, cost-effective and column-free alternative for producing recombinant proteins (and also peptides) with yield and purity comparable to that of the popular His-tag. These column-free tags induce the formation of aggregates (during or after expression) when fused to a target protein or peptide, and upon separation from soluble impurities, the target protein or peptide is subsequently released via a cleavage site. In this review, we categorize these tags as follows: (i) tags that induce inactive protein aggregates in vivo; (ii) tags that induce active protein aggregates in vivo; and (iii) tags that induce soluble expression in vivo, but aggregates in vitro. The respective advantages and disadvantages of these tags are discussed, and compared to the three conventional tags (His-tag, maltose-binding protein [MBP] tag, and intein-mediated purification with a chitin-binding tag [IMPACT-CN]). While this new class of aggregating tags is promising, more systematic tests are required to further the use. It is conceivable, however, that the combination of these tags and the more traditional columns may significantly reduce the costs for resins and columns, particularly for the industrial scale.
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Affiliation(s)
- Zhanglin Lin
- Department of Chemical Engineering, National Engineering Laboratory for Industrial Enzymes, Tsinghua University, Beijing, China.
| | - Qing Zhao
- Department of Chemical Engineering, National Engineering Laboratory for Industrial Enzymes, Tsinghua University, Beijing, China
| | - Lei Xing
- Department of Chemical Engineering, National Engineering Laboratory for Industrial Enzymes, Tsinghua University, Beijing, China
| | - Bihong Zhou
- Department of Chemical Engineering, National Engineering Laboratory for Industrial Enzymes, Tsinghua University, Beijing, China
| | - Xu Wang
- Department of Chemical Engineering, National Engineering Laboratory for Industrial Enzymes, Tsinghua University, Beijing, China
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30
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Worthington P, Pochan DJ, Langhans SA. Peptide Hydrogels - Versatile Matrices for 3D Cell Culture in Cancer Medicine. Front Oncol 2015; 5:92. [PMID: 25941663 PMCID: PMC4403249 DOI: 10.3389/fonc.2015.00092] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 03/30/2015] [Indexed: 12/31/2022] Open
Abstract
Traditional two-dimensional (2D) cell culture systems have contributed tremendously to our understanding of cancer biology but have significant limitations in mimicking in vivo conditions such as the tumor microenvironment. In vitro, three-dimensional (3D) cell culture models represent a more accurate, intermediate platform between simplified 2D culture models and complex and expensive in vivo models. 3D in vitro models can overcome 2D in vitro limitations caused by the oversupply of nutrients, and unphysiological cell-cell and cell-material interactions, and allow for dynamic interactions between cells, stroma, and extracellular matrix. In addition, 3D cultures allow for the development of concentration gradients, including oxygen, metabolites, and growth factors, with chemical gradients playing an integral role in many cellular functions ranging from development to signaling in normal epithelia and cancer environments in vivo. Currently, the most common matrices used for 3D culture are biologically derived materials such as matrigel and collagen. However, in recent years, more defined, synthetic materials have become available as scaffolds for 3D culture with the advantage of forming well-defined, designed, tunable materials to control matrix charge, stiffness, porosity, nanostructure, degradability, and adhesion properties, in addition to other material and biological properties. One important area of synthetic materials currently available for 3D cell culture is short sequence, self-assembling peptide hydrogels. In addition to the review of recent work toward the control of material, structure, and mechanical properties, we will also discuss the biochemical functionalization of peptide hydrogels and how this functionalization, coupled with desired hydrogel material characteristics, affects tumor cell behavior in 3D culture.
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Affiliation(s)
- Peter Worthington
- Nemours Center for Childhood Cancer Research, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
- Department of Biomedical Engineering, Delaware Biotechnology Institute, University of Delaware, Newark, DE, USA
| | - Darrin J. Pochan
- Department of Materials Science and Engineering, Delaware Biotechnology Institute, University of Delaware, Newark, DE, USA
| | - Sigrid A. Langhans
- Nemours Center for Childhood Cancer Research, Alfred I. duPont Hospital for Children, Wilmington, DE, USA
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Emamyari S, Kargar F, Sheikh-hasani V, Emadi S, Fazli H. Mechanisms of the self-assembly of EAK16-family peptides into fibrillar and globular structures: molecular dynamics simulations from nano- to micro-seconds. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 44:263-76. [DOI: 10.1007/s00249-015-1024-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 02/19/2015] [Accepted: 03/23/2015] [Indexed: 12/18/2022]
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32
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Tuttle T. Computational Approaches to Understanding the Self-assembly of Peptide-based Nanostructures. Isr J Chem 2015. [DOI: 10.1002/ijch.201400188] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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33
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All-Atom Molecular Dynamics Study of Four RADA 16-I Peptides: The Effects of Salts on Cluster Formation. J CLUST SCI 2015. [DOI: 10.1007/s10876-014-0836-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Owczarz M, Bolisetty S, Mezzenga R, Arosio P. Sol–gel transition of charged fibrils composed of a model amphiphilic peptide. J Colloid Interface Sci 2015; 437:244-251. [DOI: 10.1016/j.jcis.2014.09.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/09/2014] [Accepted: 09/10/2014] [Indexed: 10/24/2022]
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Sustained and controlled release of lipophilic drugs from a self-assembling amphiphilic peptide hydrogel. Int J Pharm 2014; 474:103-11. [PMID: 25148727 DOI: 10.1016/j.ijpharm.2014.08.025] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2014] [Revised: 08/12/2014] [Accepted: 08/14/2014] [Indexed: 01/27/2023]
Abstract
Materials which undergo self-assembly to form supramolecular structures can provide alternative strategies to drug loading problems in controlled release application. RADA 16 is a simple and versatile self-assembling peptide with a designed structure formed of two distinct surfaces, one hydrophilic and one hydrophobic that are positioned in such a well-ordered fashion allowing precise assembly into a predetermined organization. A "smart" architecture in nanostructures can represent a good opportunity to use RADA16 as a carrier system for hydrophobic drugs solving problems of drugs delivery. In this work, we have investigated the diffusion properties of Pindolol, Quinine and Timolol maleate from RADA16 in PBS and in BSS-PLUS at 37°C. A sustained, controlled, reproducible and efficient drug release has been detected for all the systems, which allows to understand the dependence of release kinetics on the physicochemical characteristics of RADA16 structural and chemical properties of the selected drugs and the nature of solvents used. For the analysis various physicochemical characterization techniques were used in order to investigate the state of the peptide before and after the drugs were added. Not only does RADA16 optimise drug performance, but it can also provide a solution for drug delivery issues associated with lipophilic drugs.
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36
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Emamyari S, Fazli H. pH-dependent self-assembly of EAK16 peptides in the presence of a hydrophobic surface: coarse-grained molecular dynamics simulation. SOFT MATTER 2014; 10:4248-4257. [PMID: 24740580 DOI: 10.1039/c4sm00307a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Self-assembly behavior of the three types of ionic peptide, EAK16, is studied in the presence of a hydrophobic surface using coarse-grained molecular dynamics simulations at three pH ranges of the solution. It is found that the peptide chains of all the three types assemble on the hydrophobic surface. EAK16-I and EAK16-II peptides assemble into ribbon-like structures, regardless of the value of pH. EAK16-IV peptide chains, however, assemble into ribbon-like structures at low and high pH ranges and form disc-shaped assemblies on the hydrophobic surface at the isoelectric point, pH = 7. Strong intra-chain electrostatic interactions in the case of EAK16-IV peptide play the main role in dependence of its self-assembly behavior on pH and the different morphology of its assembly relative to those of the two other types. Kinetics of growth of the assemblies on the hydrophobic surface is also studied.
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Affiliation(s)
- Soheila Emamyari
- Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.
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37
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Emamyari S, Fazli H. All-atom molecular dynamics study of EAK16 peptide: the effect of pH on single-chain conformation, dimerization and self-assembly behavior. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2014; 43:143-55. [DOI: 10.1007/s00249-014-0949-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 02/17/2014] [Accepted: 02/18/2014] [Indexed: 10/25/2022]
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38
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Abstract
Nature produces an array of self-assembled fibres from proteins and peptides with a wide range of functionalities. This has inspired scientists to design peptides that exploit specific protein folds to form simple yet multi-functional self-assembled fibres. Of the various protein folds the most commonly used has been the β-sheet fold as it is easily accessible and produces nanoscale fibres which have a wide range of stabilities. Research has also been driven by the relationship to the various amyloid diseases, which produce β-sheet rich fibres. Here we will discuss the use of natural protein sequences as the basis of peptides that self-assemble to β-sheet rich fibres followed by peptide sequences that have been designed de novo purely based on the rules for the formation of a β-sheet. How changes in the amino acid sequence of these various peptides affects the properties of the fibres and also the macroscopic materials formed by these peptides will be discussed in each case. We will then look into how these structures have been utilized for applications as scaffolds for cell culture and tissue regeneration, followed by their use in the nanotechnology field.
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39
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Kakiuchi Y, Hirohashi N, Murakami-Murofushi K. The macroscopic structure of RADA16 peptide hydrogel stimulates monocyte/macrophage differentiation in HL60 cells via cholesterol synthesis. Biochem Biophys Res Commun 2013; 433:298-304. [DOI: 10.1016/j.bbrc.2013.02.105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 02/20/2013] [Indexed: 10/27/2022]
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40
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Self-assembled octapeptide scaffolds for in vitro chondrocyte culture. Acta Biomater 2013; 9:4609-17. [PMID: 22963851 DOI: 10.1016/j.actbio.2012.08.044] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 08/01/2012] [Accepted: 08/28/2012] [Indexed: 12/24/2022]
Abstract
Nature has evolved a variety of creative approaches to many aspects of materials synthesis and microstructural control. Molecular self-assembly is a simple and efficient way to fabricate complex nanostructures such as hydrogels. We have recently investigated the gelation properties of a series of ionic-complementary peptides based on the alternation of non-polar hydrophobic and polar hydrophilic residues. In this work we focus on one specific octapeptide, FEFEFKFK (F, phenylalanine; E, glutamic acid; K, lysine). This peptide was shown to self-assemble in solution and form β-sheet-rich nanofibres which, above a critical gelation concentration, entangle to form a self-supporting hydrogel. The fibre morphology of the hydrogel was analysed using transmission electron microscopy and cryo-scanning electron microscopy illustrating a dense fibrillar network of nanometer size fibres. Oscillatory rheology results show that the hydrogel possesses visco-elastic properties. Bovine chondrocytes were used to assess the biocompatibility of the scaffolds over 21 days under two-dimensional (2-D) and three-dimensional (3-D) cell culture conditions, particularly looking at cell morphology, proliferation and matrix deposition. 2-D culture resulted in cell viability and collagen type I deposition. In 3-D culture the mechanically stable gel was shown to support the viability of cells, the retention of cell morphology and collagen type II deposition. Subsequently the scaffold may serve as a template for cartilage tissue engineering.
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41
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Jafari M, Xu W, Naahidi S, Chen B, Chen P. A new amphipathic, amino-acid-pairing (AAP) peptide as siRNA delivery carrier: physicochemical characterization and in vitro uptake. J Phys Chem B 2012; 116:13183-91. [PMID: 23077976 DOI: 10.1021/jp3072553] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
RNA interference has emerged as a powerful tool in biological and pharmaceutical research; however, the enzymatic degradation and polyanionic nature of short interfering RNAs (siRNAs) lead to their poor cellular uptake and eventual biological effects. Among nonviral delivery systems, cell-penetrating peptides have been recently employed to improve the siRNA delivery efficiency. Here we introduce an 18-mer amphipathic, amino-acid-pairing peptide, C6, as an siRNA delivery carrier. Peptide C6 adopted a helical structure upon coassembling with siRNA. The C6-siRNA coassembly showed a size distribution between 50 and 250 nm, confirmed by dynamic light scattering and atomic force microscopy. The C6-siRNA interaction enthalpy and stoichiometry were 8.8 kJ·mol(-1) and 6.5, respectively, obtained by isothermal titration calorimetry. A minimum C6/siRNA molar ratio of 10:1 was required to form stable coassemblies/complexes, indicated by agarose gel shift assay and fluorescence spectroscopy. Peptide C6 showed lower toxicity and higher efficiency in cellular uptake of siRNA compared with Lipofectamine 2000. Fluorescence microscopy images also confirmed the localization of C6-siRNA complexes in the cytoplasm using Cy3-labeled siRNAs. These results indicate high capabilities of C6 in forming safe and stable complexes with siRNA and enhancing its cellular uptake.
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Affiliation(s)
- Mousa Jafari
- Department of Chemical Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
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42
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Nakazawa CT, Asano A, Kurotsu T. Structural studies of amphiphilic oligopeptides composed of alternating alanine and ionizable amino-acid residues using CD and 13C CP/MAS NMR spectroscopy. Polym J 2012. [DOI: 10.1038/pj.2012.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Arosio P, Owczarz M, Wu H, Butté A, Morbidelli M. End-to-end self-assembly of RADA 16-I nanofibrils in aqueous solutions. Biophys J 2012; 102:1617-26. [PMID: 22500762 DOI: 10.1016/j.bpj.2012.03.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 02/23/2012] [Accepted: 03/02/2012] [Indexed: 10/28/2022] Open
Abstract
RADARADARADARADA (RADA 16-I) is a synthetic amphiphilic peptide designed to self-assemble in a controlled way into fibrils and higher ordered structures depending on pH. In this work, we use various techniques to investigate the state of the peptide dispersed in water under dilute conditions at different pH and in the presence of trifluoroacetic acid or hydrochloric acid. We have identified stable RADA 16-I fibrils at pH 2.0-4.5, which have a length of ∼200-400 nm and diameter of 10 nm. The fibrils have the characteristic antiparallel β-sheet structure of amyloid fibrils, as measured by circular dichroism and Fourier transform infrared spectrometry. During incubation at pH 2.0-4.5, the fibrils elongate very slowly via an end-to-end fibril-fibril aggregation mechanism, without changing their diameter, and the kinetics of such aggregation depends on pH and anion type. At pH 2.0, we also observed a substantial amount of monomers in the system, which do not participate in the fibril elongation and degrade to fragments. The fibril-fibril elongation kinetics has been simulated using the Smoluchowski kinetic model, population balance equations, and the simulation results are in good agreement with the experimental data. It is also found that the aggregation process is not limited by diffusion but rather is an activated process with energy barrier in the order of 20 kcal/mol.
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Affiliation(s)
- Paolo Arosio
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, Zurich, Switzerland
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44
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SivakamaSundari C, Rukmani S, Nagaraj R. Effect of introducing a short amyloidogenic sequence from the Aβ peptide at the N-terminus of 18-residue amphipathic helical peptides. J Pept Sci 2012; 18:122-8. [DOI: 10.1002/psc.1424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Revised: 09/10/2011] [Accepted: 09/13/2011] [Indexed: 12/16/2022]
Affiliation(s)
| | - Sridharan Rukmani
- CSIR-Centre for Cellular and Molecular Biology; Uppal Road; Hyderabad ; 500 007; India
| | - Ramakrishnan Nagaraj
- CSIR-Centre for Cellular and Molecular Biology; Uppal Road; Hyderabad ; 500 007; India
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45
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Liu J, Zhao X. Design of self-assembling peptides and their biomedical applications. Nanomedicine (Lond) 2011; 6:1621-43. [PMID: 22077465 DOI: 10.2217/nnm.11.142] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Combining physics, engineering, chemistry and biology, we can now design, synthesize and fabricate biological nanomaterials at the molecular scale using self-assembling peptide systems. These peptides have been used for fabrication of nanomaterials, including nanofibers, nanotubes and vesicles, nanometer-thick surface coating and nanowires. Some of these peptides are used for stabilizing membrane proteins and drug delivery, and others provide a more permissive environment for 3D cell culture, tissue engineering and repair of tissues in regenerative medicine. Self-assembling peptides are also useful for fabricating a wide spectrum of exquisitely fine architectures, nanomaterials and nanodevices for nanomedicine and nanobiotechnology. These peptide systems lie at the interface between molecular biology, chemistry, materials science and engineering. The studies of designed self-assembling peptides and their applications will help us to understand nature’s enormous power and how to apply it to benefit other disciplines and society.
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Affiliation(s)
- Jingping Liu
- West China Hospital Laboratory of Nanomedicine & Institute for Nanobiomedical Technology & Membrane Biology, Sichuan University, Chengdu, 610041, China
- Key Laboratory of Transplant Engineering & Immunology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiaojun Zhao
- Center for Biomedical Engineering, NE47-379, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
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46
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47
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Gelain F, Silva D, Caprini A, Taraballi F, Natalello A, Villa O, Nam KT, Zuckermann RN, Doglia SM, Vescovi A. BMHP1-derived self-assembling peptides: hierarchically assembled structures with self-healing propensity and potential for tissue engineering applications. ACS NANO 2011; 5:1845-1859. [PMID: 21314189 DOI: 10.1021/nn102663a] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Self-assembling peptides (SAPs) are rapidly gaining interest as bioinspired scaffolds for cell culture and regenerative medicine applications. Bone Marrow Homing Peptide 1 (BMHP1) functional motif (PFSSTKT) was previously demonstrated to stimulate neural stem cell (NSC) viability and differentiation when linked to SAPs. We here describe a novel ensemble of SAPs, developed from the BMHP1 (BMHP1-SAPs), that spontaneously assemble into tabular fibers, twisted ribbons, tubes and hierarchical self-assembled sheets: organized structures in the nano- and microscale. Thirty-two sequences were designed and evaluated, including biotinylated and unbiotinylated sequences, as well as a hybrid peptide-peptoid sequence. Via X-ray diffraction (XRD), CD, and FTIR experiments we demonstrated that all of the BMHP1-SAPs share similarly organized secondary structures, that is, β-sheets and β-turns, despite their heterogeneous nanostructure morphology, scaffold stiffness, and effect over NSC differentiation and survival. Notably, we demonstrated the self-healing propensity of most of the tested BMHP1-SAPs, enlarging the set of potential applications of these novel SAPs. In in vitro cell culture experiments, we showed that some of these 10-mer peptides foster adhesion, differentiation, and proliferation of human NSCs. RGD-functionalized and hybrid peptide-peptoid self-assembling sequences also opened the door to BMHP1-SAP functionalization with further bioactive motifs, essential to tailor new scaffolds for specific applications. In in vivo experiments we verified a negligible reaction of the host nervous tissue to the injected and assembled BMHP1-SAP. This work will pave the way to the development of novel SAP sequences that may be useful for material science and regenerative medicine applications.
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Affiliation(s)
- Fabrizio Gelain
- Center for Nanomedicine and Tissue Engineering-A.O. Ospedale Niguarda Ca' Granda, Piazza dell'ospedale maggiore 3, Milan, 20162, Italy.
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48
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Leon L, Logrippo P, Tu R. Self-assembly of rationally designed peptides under two-dimensional confinement. Biophys J 2011; 99:2888-95. [PMID: 21044586 DOI: 10.1016/j.bpj.2010.08.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 07/27/2010] [Accepted: 08/13/2010] [Indexed: 10/18/2022] Open
Abstract
The rational design of interfacially confined biomolecules offers a unique opportunity to explore the cooperative relationship among self-assembly, nucleation, and growth processes. This article highlights the role of electrostatics in the self-assembly of β-sheet-forming peptides at the air-water interface. We characterize the phase behavior of a periodically sequenced sheet-forming peptide by using Langmuir techniques, Brewster angle microscopy, attenuated total reflection Fourier transform infrared spectroscopy, and circular dichroism spectroscopy. We find that peptides with an alternating binary sequence transition at high pressures from discrete circular domains to fibrous domains. The qualitative behavior is independent of surface pressure but dependent on molecular areas. In addition, thermodynamic models are employed to specifically quantify differences in electrostatics by obtaining parameters for the critical aggregation area, the limiting molecular area, and the dimensionless ratio of line tension/dipole density. Using these parameters, we are able to relate localized charge distribution to phase transitions, which will allow us to apply these molecules to examine how the dynamics of self-assembly can be directly coupled to the formation of composite nanostructures in biology.
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Affiliation(s)
- Lorraine Leon
- Chemical Engineering Department, The City College of The City University of New York, New York, USA
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49
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Iafisco M, Foggia MD, Bonora S, Prat M, Roveri N. Adsorption and spectroscopic characterization of lactoferrin on hydroxyapatite nanocrystals. Dalton Trans 2011; 40:820-7. [DOI: 10.1039/c0dt00714e] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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50
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A peptide-based material platform for displaying antibodies to engage T cells. Biomaterials 2011; 32:249-57. [DOI: 10.1016/j.biomaterials.2010.08.083] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Accepted: 08/27/2010] [Indexed: 11/18/2022]
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