151
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Andrade D, Oliveira LBA, Colherinhas G. Elucidating NH2-I3V3A3G3K3-COOH and NH2-K3G3A3V3I3-COOH polypeptide membranes: A classical molecular dynamics study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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152
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Castelletto V, Edwards-Gayle CJC, Hamley IW, Barrett G, Seitsonen J, Ruokolainen J. Peptide-Stabilized Emulsions and Gels from an Arginine-Rich Surfactant-like Peptide with Antimicrobial Activity. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9893-9903. [PMID: 30785266 PMCID: PMC7005944 DOI: 10.1021/acsami.9b00581] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/20/2019] [Indexed: 05/05/2023]
Abstract
The preparation of hydrogels and stable emulsions is important in the formulation of many functional nanostructured soft materials. We investigate the multifunctional self-assembly and bioactivity properties of a novel surfactant-like peptide (SLP) that shows antimicrobial activity, is able to form hydrogels without pH adjustment, and is able to stabilize oil-in-water emulsions. Furthermore, we demonstrate on-demand de-emulsification in response to the protease enzyme elastase. We show that SLP (Ala)9-Arg (A9R) forms β-sheet fibers above a critical aggregation concentration and that water-in-oil emulsions are stabilized by a coating of β-sheet fibers around the emulsion droplets. Furthermore, we demonstrate enzyme-responsive de-emulsification, which has potential in the development of responsive release systems. The peptide shows selective antimicrobial activity against Gram-negative pathogens including Pseudomonas aeruginosa, which causes serious infections. Our results highlight the utility of SLPs in the stabilization of oil/water emulsions and the potential for these to be used to formulate antimicrobial peptide emulsions which are additionally responsive to protease. The peptide A9R has pronounced antibacterial activity against clinically challenging pathogens, and its ability to form β-sheet fibers plays a key role in its diverse structural properties, ranging from hydrogel formation to emulsion stabilization.
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Affiliation(s)
- Valeria Castelletto
- Department of Chemistry and School of Biological
Sciences, University of Reading, Reading RG6 6AD, United Kingdom
| | | | - Ian W. Hamley
- Department of Chemistry and School of Biological
Sciences, University of Reading, Reading RG6 6AD, United Kingdom
| | - Glyn Barrett
- Department of Chemistry and School of Biological
Sciences, University of Reading, Reading RG6 6AD, United Kingdom
| | - Jani Seitsonen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja
2, FIN-02150 Espoo, Finland
| | - Janne Ruokolainen
- Nanomicroscopy Center, Aalto University, Puumiehenkuja
2, FIN-02150 Espoo, Finland
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153
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Rivas M, Del Valle LJ, Alemán C, Puiggalí J. Peptide Self-Assembly into Hydrogels for Biomedical Applications Related to Hydroxyapatite. Gels 2019; 5:E14. [PMID: 30845674 PMCID: PMC6473879 DOI: 10.3390/gels5010014] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 02/19/2019] [Accepted: 02/25/2019] [Indexed: 01/02/2023] Open
Abstract
Amphiphilic peptides can be self-assembled by establishing physical cross-links involving hydrogen bonds and electrostatic interactions with divalent ions. The derived hydrogels have promising properties due to their biocompatibility, reversibility, trigger capability, and tunability. Peptide hydrogels can mimic the extracellular matrix and favor the growth of hydroxyapatite (HAp) as well as its encapsulation. Newly designed materials offer great perspectives for applications in the regeneration of hard tissues such as bones, teeth, and cartilage. Furthermore, development of drug delivery systems based on HAp and peptide self-assembly is attracting attention.
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Affiliation(s)
- Manuel Rivas
- Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
| | - Luís J Del Valle
- Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
| | - Carlos Alemán
- Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
| | - Jordi Puiggalí
- Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, 08019 Barcelona, Spain.
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154
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Chaberska A, Fraczyk J, Wasko J, Rosiak P, Kaminski ZJ, Solecka A, Stodolak‐Zych E, Strzempek W, Menaszek E, Dudek M, Niemiec W, Kolesinska B. Study on the Materials Formed by Self‐Assembling Hydrophobic, Aromatic Peptides Dedicated to Be Used for Regenerative Medicine. Chem Biodivers 2019; 16:e1800543. [DOI: 10.1002/cbdv.201800543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 12/13/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Agata Chaberska
- Institute of Organic ChemistryLodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Justyna Fraczyk
- Institute of Organic ChemistryLodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Joanna Wasko
- Institute of Organic ChemistryLodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Piotr Rosiak
- Institute of Organic ChemistryLodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Zbigniew J. Kaminski
- Institute of Organic ChemistryLodz University of Technology Zeromskiego 116 90-924 Lodz Poland
| | - Agnieszka Solecka
- AGH – University of Science and TechnologyDepartment of Biomaterials A. Mickiewicz 30 30-059 Krakow Poland
| | - Ewa Stodolak‐Zych
- AGH – University of Science and TechnologyDepartment of Biomaterials A. Mickiewicz 30 30-059 Krakow Poland
| | - Weronika Strzempek
- Department of Cytology, CMUJJagiellonian University Medical College Swietej Anny 12 31-008 Krakow Poland
| | - Elzbieta Menaszek
- Department of Cytology, CMUJJagiellonian University Medical College Swietej Anny 12 31-008 Krakow Poland
| | - Mariusz Dudek
- Institute of Materials Science and EngineeringLodz University of Technology Stefanowskiego 1/15 90-924 Lodz Poland
| | - Wiktor Niemiec
- AGH – University of Science and TechnologyDepartment of Silicate Chemistry and Macromolecular Compounds Department of Silicates Chemistry A. Mickiewicza 30 30-059 Krakow Poland
| | - Beata Kolesinska
- Institute of Organic ChemistryLodz University of Technology Zeromskiego 116 90-924 Lodz Poland
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155
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Kulkarni K, Habila N, Del Borgo MP, Aguilar MI. Novel Materials From the Supramolecular Self-Assembly of Short Helical β 3-Peptide Foldamers. Front Chem 2019; 7:70. [PMID: 30828574 PMCID: PMC6384263 DOI: 10.3389/fchem.2019.00070] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/25/2019] [Indexed: 11/13/2022] Open
Abstract
Self-assembly is the spontaneous organization of small components into higher-order structures facilitated by the collective balance of non-covalent interactions. Peptide-based self-assembly systems exploit the ability of peptides to adopt distinct secondary structures and have been used to produce a range of well-defined nanostructures, such as nanotubes, nanofibres, nanoribbons, nanospheres, nanotapes, and nanorods. While most of these systems involve self-assembly of α-peptides, more recently β-peptides have also been reported to undergo supramolecular self-assembly, and have been used to produce materials-such as hydrogels-that are tailored for applications in tissue engineering, cell culture and drug delivery. This review provides an overview of self-assembled peptide nanostructures obtained via the supramolecular self-assembly of short β-peptide foldamers with a specific focus on N-acetyl-β3-peptides and their applications as bio- and nanomaterials.
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Affiliation(s)
| | | | - Mark P. Del Borgo
- Department of Biochemistry and Molecular Biology and Biomedicine Discovery Institute, Monash Univdersity, Melbourne, VIC, Australia
| | - Marie-Isabel Aguilar
- Department of Biochemistry and Molecular Biology and Biomedicine Discovery Institute, Monash Univdersity, Melbourne, VIC, Australia
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156
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Wakabayashi R, Suehiro A, Goto M, Kamiya N. Designer aromatic peptide amphiphiles for self-assembly and enzymatic display of proteins with morphology control. Chem Commun (Camb) 2019; 55:640-643. [PMID: 30628590 DOI: 10.1039/c8cc08163h] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We herein designed bi-functional aromatic peptide amphiphiles both self-assembling to fibrous nanomaterials and working as a substrate of microbial transglutaminase, leading to peptidyl scaffolds with different morphologies that can be enzymatically post-functionalized with proteins.
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Affiliation(s)
- Rie Wakabayashi
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
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157
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Rodrigues de Almeida N, Han Y, Perez J, Kirkpatrick S, Wang Y, Sheridan MC. Design, Synthesis, and Nanostructure-Dependent Antibacterial Activity of Cationic Peptide Amphiphiles. ACS APPLIED MATERIALS & INTERFACES 2019; 11:2790-2801. [PMID: 30588791 PMCID: PMC7199185 DOI: 10.1021/acsami.8b17808] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The development of bacterial resistant strains is a global health concern. Designing antibiotics that limit the rise of pathogenic resistance is essential to efficiently treat pathogenic infections. Self-assembling amphiphilic molecules are an intriguing platform for the treatment of pathogens because of their ability to disrupt bacterial membranes and function as drug nanocarriers. We have designed cationic peptide amphiphiles (PAs) that can form micelles, nanofibers, and twisted ribbons with the aim of understanding antimicrobial activity at the supramolecular level. We have found that micelle-forming PAs possess excellent antimicrobial activity against various Gram-positive and Gram-negative pathogens, such as methicillin-resistant Staphylococcus aureus (MRSA) and multidrug-resistant Klebsiella pneumoniae with minimal inhibitory concentrations (MICs) ranging between 1 and 8 μg/mL, when compared to nanofibers with MICs >32 μg/mL. The data suggest that the antimicrobial activity of the PAs depends on their morphology, amino acid sequence, the length of the alkyl tail, and the overall hydrophobicity of the PA. Scanning electron microscopy, confocal microscopy, and flow cytometry studies using MRSA and Escherichia coli K12 strains showed that PAs increase cell membrane permeability and disrupt the integrity of pathogen's membrane, leading to cell lysis and death. PAs are a promising platform to develop new antimicrobials that could work as nanocarriers to develop synergistic antibacterial therapies.
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Affiliation(s)
- Nathalia Rodrigues de Almeida
- Department of Pharmaceutical Sciences , College of Pharmacy, University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
| | - Yuchun Han
- Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Sciences (BNLMS) , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , People's Republic of China
| | | | | | - Yilin Wang
- Key Laboratory of Colloid and Interface Science, Beijing National Laboratory for Molecular Sciences (BNLMS) , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , People's Republic of China
| | - Martin Conda Sheridan
- Department of Pharmaceutical Sciences , College of Pharmacy, University of Nebraska Medical Center , Omaha , Nebraska 68198 , United States
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158
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Hutchinson JA, Hamley IW, Torras J, Alemán C, Seitsonen J, Ruokolainen J. Self-Assembly of Lipopeptides Containing Short Peptide Fragments Derived from the Gastrointestinal Hormone PYY 3-36: From Micelles to Amyloid Fibrils. J Phys Chem B 2019; 123:614-621. [PMID: 30609361 PMCID: PMC7005981 DOI: 10.1021/acs.jpcb.8b11097] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
We
investigate the impact of lipidation on the self-assembly of
two peptide fragments from the gastrointestinal peptide hormone PYY3–36. The lipopeptides C16IKPEAP and C16IKPEAPGE contain the first 6 and 8 amino acid residues, respectively,
from the PYY3–36 peptide sequence, with a palmitoyl
C16 tail attached at the N-terminus. These lipopeptides
form spherical micelles in aqueous solution, above a critical micelle
concentration (cmc), which is pH-dependent. Modeling of small-angle
X-ray scattering data along with molecular dynamics simulations shows
the formation of micelles with a hydrophobic interior and a well-hydrated
exterior. The lipopeptides have a disordered conformation over the
pH and temperature ranges studied. The cmc is found to be independent
of temperature, pointing to athermal micellization. In contrast to
the presence of hydrated micelles in solution, β-sheet amyloid
fibrils form in dried samples. Thus, the nanostructure of lipidated
PYY3–36 fragment peptides can be tuned by control
of pH or concentration, for future applications.
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Affiliation(s)
- Jessica A Hutchinson
- Department of Chemistry , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ian W Hamley
- Department of Chemistry , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Juan Torras
- Department of Chemical Engineering and Barcelona Research Center for Multiscale Science and Engineering , Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est (EEBE) Campus Diagonal Besòs , C/Eduard Maristany 10-14 , 08019 Barcelona , Spain
| | - Carlos Alemán
- Department of Chemical Engineering and Barcelona Research Center for Multiscale Science and Engineering , Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est (EEBE) Campus Diagonal Besòs , C/Eduard Maristany 10-14 , 08019 Barcelona , Spain
| | - Jani Seitsonen
- Nanomicroscopy Center , Aalto University , Puumiehenkuja 2 , FIN-02150 Espoo , Finland
| | - Janne Ruokolainen
- Nanomicroscopy Center , Aalto University , Puumiehenkuja 2 , FIN-02150 Espoo , Finland
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159
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Mei L, He S, Zhang L, Xu K, Zhong W. Supramolecular self-assembly of fluorescent peptide amphiphiles for accurate and reversible pH measurement. Org Biomol Chem 2019; 17:939-944. [DOI: 10.1039/c8ob02983k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report the synthesis and self-assembly of fluorescent peptide amphiphiles (NBD-PA) composed of a fluorescent NBD probe and a peptide derivative VVAADD with a C12-alkyl-chain as the linker (NBD-C12-VVAADD).
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Affiliation(s)
- Leixia Mei
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Suyun He
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Li Zhang
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Keming Xu
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Wenying Zhong
- Department of Analytical Chemistry
- China Pharmaceutical University
- Nanjing
- P. R. China
- Key Laboratory of Biomedical Functional Materials
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160
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Ye Z, Zhu X, Acosta S, Kumar D, Sang T, Aparicio C. Self-assembly dynamics and antimicrobial activity of all l- and d-amino acid enantiomers of a designer peptide. NANOSCALE 2018; 11:266-275. [PMID: 30534763 PMCID: PMC6319268 DOI: 10.1039/c8nr07334a] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Recent studies have shown that antimicrobial peptides (AMPs) can self-assemble into supramolecular structures, but this has been overlooked as causative of their antimicrobial activity. Also, the higher antimicrobial potency of d-enantiomers compared to l-enantiomers of AMPs cannot always be attributed to their different resistance to protease degradation. Here, we tested all l- and d-amino acid versions of GL13K, an AMP derived from a human protein, to study structural links between the AMP secondary structure, supramolecular self-assembly dynamics, and antimicrobial activity. pH dependence and the evolution of secondary structures were related to a self-assembly process with differences among these AMPs. The two GL13K enantiomers formed analogous self-assembled twisted nanoribbon structures, but d-GL13K initiated self-assembly faster and had notably higher antimicrobial potency than l-GL13K. A non-antimicrobial scrambled amino acid version of l-GL13K assembled at a much higher pH to form distinctively different self-assembled structures than l-GL13K. Our results support a functional relationship between the AMP self-assembly and their antimicrobial activity.
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Affiliation(s)
- Zhou Ye
- MDRCBB, Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota, Minneapolis, Minnesota 55455, USA.
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161
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Cox H, Xu H, Waigh TA, Lu JR. Single-Molecule Study of Peptide Gel Dynamics Reveals States of Prestress. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14678-14689. [PMID: 30407830 DOI: 10.1021/acs.langmuir.8b03334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
De novo peptide surfactant (I3K) gels provide an ideal system to study the complex dynamics of lightly cross-linked semiflexible fibers because of their large contour lengths, simple chemistry, and slow dynamics. We used single-molecule fluorescence microscopy to record individual fibers and Fourier decomposition of the fiber dynamics to separate thermal contributions to the persistence length from compressive states of prestress (SPS). Our results show that SPS in the network depend strongly on peptide concentration, buffer, and pH and that the fibril energies in SPS follow a Lévy distribution. The presence of SPS in the network imply that collective states of self-stress are also present. Therefore, semiflexible polymer gels need to be considered as complex load-bearing structures and the mean field models for polymer gel elasticity and dynamics often applied to them will not be fully representative of the behavior at the nanoscale. We quantify the impact of cross-links on reptation tube dynamics, which provides a second population of tube fluctuations in addition to those expected for uncross-linked entangled solutions.
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Affiliation(s)
- Henry Cox
- Biological Physics, School of Physics and Astronomy , University of Manchester , Manchester M13 9PL , U.K
| | - Hai Xu
- Centre for Bioengineering and Biotechnology , China University of Petroleum (East China) , 66 Changjiang West Road , Qingdao 266555 , China
| | - Thomas A Waigh
- Biological Physics, School of Physics and Astronomy , University of Manchester , Manchester M13 9PL , U.K
- Photon Science Institute , University of Manchester , Manchester M13 9PY , U.K
| | - Jian R Lu
- Biological Physics, School of Physics and Astronomy , University of Manchester , Manchester M13 9PL , U.K
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162
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Chen Y, Xing Z, Liao D, Qiu F. Neglected Hydrophobicity of Dimethanediyl Group in Peptide Self-Assembly: A Hint from Amyloid-like Peptide GNNQQNY and Its Derivatives. J Phys Chem B 2018; 122:10470-10477. [PMID: 30372075 DOI: 10.1021/acs.jpcb.8b09220] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Besides typical hydrophobic amino acids providing hydrophobic interactions, glutamine as a hydrophilic amino acid has also been known to be an important element in many self-assembling peptides, but it is still not clear how this particular amino acid contributes to the self-assembling process. We supposed that the dimethanediyl group in the side chain of glutamine could provide hydrophobic interaction for peptide self-assembly. To prove this hypothesis, we used the GNNQQNY peptide and its derivatives as examples to show the importance of the dimethanediyl group for peptide self-assembly. We found a very close relationship between the number of dimethanediyl groups, the strength of hydrophobic interaction, and the self-assembling ability of the peptides, indicating the hydrophobicity of the dimethanediyl group and its important role for self-assembly. This new finding might be instructive for clarifying the self-assembling mechanism of many natural peptides, as well as for developing novel self-assembling peptide nanomaterials.
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163
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Malekkhaiat Häffner S, Malmsten M. Influence of self-assembly on the performance of antimicrobial peptides. Curr Opin Colloid Interface Sci 2018. [DOI: 10.1016/j.cocis.2018.09.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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164
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Okur Z, Senturk OI, Yilmaz C, Gulseren G, Mammadov B, Guler MO, Tekinay AB. Promotion of neurite outgrowth by rationally designed NGF-β binding peptide nanofibers. Biomater Sci 2018; 6:1777-1790. [PMID: 29770392 DOI: 10.1039/c8bm00311d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Promotion of neurite outgrowth is an important limiting step for regeneration in nerve injury and depends strongly on the local expression of nerve growth factor (NGF). The rational design of bioactive materials is a promising approach for the development of novel therapeutic methods for nerve regeneration, and biomaterials capable of presenting NGF to nerve cells are especially suitable for this purpose. In this study, we show bioactive peptide amphiphile (PA) nanofibers capable of promoting neurite outgrowth by displaying high density binding epitopes for NGF. A high-affinity NGF-binding sequence was identified by phage display and combined with a beta-sheet forming motif to produce a self-assembling PA molecule. The bioactive nanofiber had higher affinity for NGF compared to control nanofibers and in vitro studies revealed that the NGF binding peptide amphiphile nanofibers (NGFB-PA nanofiber) significantly promote the neurite outgrowth of PC-12 cells. In addition, the nanofibers induced differentiation of PC-12 cells into neuron-like cells by enhancing NGF/high-activity NGF receptor (TrkA) interactions and activating MAPK pathway elements. The NGFB-PA nanofiber was further shown as a promising material to support axonal outgrowth from primary sensory neurons. These materials will pave the way for the development of new therapeutic agents for peripheral nervous system injuries.
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Affiliation(s)
- Zeynep Okur
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey.
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165
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Figueira TN, Mendonça DA, Gaspar D, Melo MN, Moscona A, Porotto M, Castanho MARB, Veiga AS. Structure-Stability-Function Mechanistic Links in the Anti-Measles Virus Action of Tocopherol-Derivatized Peptide Nanoparticles. ACS NANO 2018; 12:9855-9865. [PMID: 30230818 PMCID: PMC6399014 DOI: 10.1021/acsnano.8b01422] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Measles remains one of the leading causes of child mortality worldwide and is re-emerging in some countries due to poor vaccine coverage, concomitant with importation of measles virus (MV) from endemic areas. The lack of specific chemotherapy contributes to negative outcomes, especially in infants or immunodeficient individuals. Fusion inhibitor peptides derived from the MV Fusion protein C-terminal Heptad Repeat (HRC) targeting MV envelope fusion glycoproteins block infection at the stage of entry into host cells, thus preventing viral multiplication. To improve efficacy of such entry inhibitors, we have modified a HRC peptide inhibitor by introducing properties of self-assembly into nanoparticles (NP) and higher affinity for both viral and cell membranes. Modification of the peptide consisted of covalent grafting with tocopherol to increase amphipathicity and lipophilicity (HRC5). One additional peptide inhibitor consisting of a peptide dimer grafted to tocopherol was also used (HRC6). Spectroscopic, imaging, and simulation techniques were used to characterize the NP and explore the molecular basis for their antiviral efficacy. HRC5 forms micellar stable NP while HRC6 aggregates into amorphous, loose, unstable NP. Interpeptide cluster bridging governs NP assembly into dynamic metastable states. The results are consistent with the conclusion that the improved efficacy of HRC6 relative to HRC5 can be attributed to NP instability, which leads to more extensive partition to target membranes and binding to viral target proteins.
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Affiliation(s)
- Tiago N. Figueira
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Diogo A. Mendonça
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Diana Gaspar
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Manuel N. Melo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2775-412 Oeiras, Portugal
| | - Anne Moscona
- Department of Pediatrics, Columbia University Medical Center, New York, New York 10032, United States
- Center for Host−Pathogen Interaction, Columbia University Medical Center, New York, New York 10032, United States
- Department of Microbiology & Immunology, Columbia University Medical Center, New York, New York 10032, United States
- Department of Physiology & Cellular Biophysics, Columbia University Medical Center, New York, New York 10032, United States
| | - Matteo Porotto
- Department of Pediatrics, Columbia University Medical Center, New York, New York 10032, United States
- Center for Host−Pathogen Interaction, Columbia University Medical Center, New York, New York 10032, United States
- Department of Experimental Medicine, University of Campania ‘Luigi Vanvitelli’, 81100 Caserta, Italy
| | - Miguel A. R. B. Castanho
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
| | - Ana Salomé Veiga
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal
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166
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Quan C, Zhang Z, Liang P, Zheng J, Wang J, Hou Y, Tang Q. Bioactive gel self-assembled from phosphorylate biomimetic peptide: A potential scaffold for enhanced osteogenesis. Int J Biol Macromol 2018; 121:1054-1060. [PMID: 30359655 DOI: 10.1016/j.ijbiomac.2018.10.148] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/21/2018] [Accepted: 10/21/2018] [Indexed: 01/06/2023]
Abstract
Bone morphogenetic protein-2 biomimetic peptide (BMPBP) is a potent osteoinductive cytokine and plays a critical role during bone regeneration. Efforts to prepare hydrogels with surface modification or physical absorption of bioactive molecules do not provide sufficient bioactivity to meet the requirements of clinical application. The goal of this study was to form a three-dimensional hydrogel comprised of BMP-2 core sequence oligopeptide, phosphoserine, a synthetic cell adhesion peptide (RGDS), and polyaspartic acid to synergistically promote osteogenesis. Experiments performed in vitro revealed that the peptide gel was conducive to adhesion and proliferation of rat marrow mesenchymal stem cells (rMSCs). In addition, RT-PCR analysis indicated that rMSCs allowed better expression of osteogenesis-related genes such as BMP-2, runt-related transcription factor 2 (RUNX2), alkaline phosphatase (ALP), osteocalcin (OCN), and osteopontin (OPN). Use of the rat cranial bone defects model with micro-CT 3D reconstruction showed that bone regeneration patterns occurred from one side edge toward the center of the area implanted with the prepared biomimetic peptide hydrogels, demonstrating significantly accelerated bone regeneration. This work will provide a basis to explore the further application potential of this bioactive scaffold.
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Affiliation(s)
- Changyun Quan
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, PR China.
| | - Zhaoqing Zhang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Peiqing Liang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Junjiong Zheng
- Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, PR China
| | - Jiping Wang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Yulin Hou
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, PR China
| | - Qiyan Tang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instruments, School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, PR China
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167
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Kozawa SK, Matsumoto K, Suzuki A, Sawamoto M, Terashima T. Self‐assembly of amphiphilic ABA random triblock copolymers in water. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Susan K. Kozawa
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto University, Katsura Nishikyo‐ku Kyoto 615‐8510 Japan
- Department of Macromolecular Science and EngineeringCase Western Reserve University, 2100 Adelbert Road Cleveland Ohio 44106
| | - Kazuma Matsumoto
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto University, Katsura Nishikyo‐ku Kyoto 615‐8510 Japan
| | - Ayaka Suzuki
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto University, Katsura Nishikyo‐ku Kyoto 615‐8510 Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto University, Katsura Nishikyo‐ku Kyoto 615‐8510 Japan
- Institute of Science and Technology Research, Chubu University, 1200 Matsumoto‐cho Kasugai Aichi 487‐8501 Japan
| | - Takaya Terashima
- Department of Polymer Chemistry, Graduate School of EngineeringKyoto University, Katsura Nishikyo‐ku Kyoto 615‐8510 Japan
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168
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Mansbach RA, Ferguson AL. Patchy Particle Model of the Hierarchical Self-Assembly of π-Conjugated Optoelectronic Peptides. J Phys Chem B 2018; 122:10219-10236. [DOI: 10.1021/acs.jpcb.8b05781] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rachael A. Mansbach
- Department of Physics, University of Illinois at Urbana−Champaign, 1110 West Green Street, Urbana, Illinois 61801, United States
| | - Andrew L. Ferguson
- Department of Physics, University of Illinois at Urbana−Champaign, 1110 West Green Street, Urbana, Illinois 61801, United States
- Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, 1304 W Green Street, Urbana, Illinois 61801, United States
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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169
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Zhao L, Tu Y, Fang H, Hamley IW, Wang Z. Self-Assembled Micellar Structures of Lipopeptides with Variable Number of Attached Lipid Chains Revealed by Atomistic Molecular Dynamics Simulations. J Phys Chem B 2018; 122:9605-9615. [PMID: 30253107 DOI: 10.1021/acs.jpcb.8b07877] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We present atomistic molecular dynamics simulation study of the self-assembly behavior of toll-like agonist lipopeptides (Pam nCSK4) in aqueous solutions. The variable number of hexadecyl lipid chains ( n = 1, 2, 3) per molecule has been experimentally suggested to have remarkable influence on their self-assembled nanostructures. Starting from preassembled spherical or bilayer configurations, the aggregates of lipopeptides, PamCSK4 and Pam2CSK4, which contain peptide sequences CSK4 linked to either mono- or dilipid chains (Pam), evolve into spherical-like micelles within 30 ns, whereas the self-assembled structure of trilipidated lipopeptides, Pam3CSK4, relaxes much slower and reaches an equilibrium state of flattened wormlike micelle with a bilayer packing structure. The geometric shapes and sizes, namely the gyration radii of spherical micelles and thickness of the flattened wormlike micelle, are found to be in good agreement with experimental measurements, which effectively validates the simulation models and employed force fields. Detailed analyses of molecular packing reveal that these self-assembled nanostructures all consist of a hydrophobic core constructed of lipid chains, a transitional layer, and a hydrophilic interfacial layer composed of peptide sequences. The average area per peptide head at the interfaces is found to be nearly constant for all micellar structures studied. The packing parameter of the lipopeptide molecules thus increases with the increase of the number of linked lipid chains, giving rise to the distinct micellar shape transition from spherical-like to flattened wormlike geometry with bilayer stacking, which is qualitatively different from the shape transitions of surfactant micelles induced by variation of concentration or salt type. To facilitate the close-packing of the lipid chains in the hydrophobic core, the lipopeptide molecules typically take the bent conformation with average tilt angles between the peptide sequences and the lipid chains ranging from 110° to 140°. This consequently affects the orientation angles of the lipid chains with respect to the radial or normal direction of the spherical-like or flattened wormlike micelles. In addition, the secondary structures of the peptides may also be altered by the number of lipid chains to which they are linked and the resultant micellar structures. Our simulation results on the microscopic structural features of the lipopeptide nanostructures may provide potential insights into their bioactivities and contribute to the design of bioactive medicines or drug carriers. The force fields built for these lipopeptides and the geometric packing discussions could also be adopted for simulating and understanding the self-assembly behavior of other bioactive amiphiphiles with similar chemical compositions.
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Affiliation(s)
- Liang Zhao
- College of Physical Science and Technology , Yangzhou University , Yangzhou , Jiangsu 225009 , China
| | - Yusong Tu
- College of Physical Science and Technology , Yangzhou University , Yangzhou , Jiangsu 225009 , China
| | - Haiping Fang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800 , China
| | - Ian W Hamley
- Department of Chemistry , University of Reading , Whiteknights, Reading RG6 6AD , United Kingdom
| | - Zuowei Wang
- School of Mathematical, Physical and Computational Sciences , University of Reading , Whiteknights, Reading RG6 6AX , United Kingdom
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170
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171
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Sánchez-Ferrer A, Adamcik J, Handschin S, Hiew SH, Miserez A, Mezzenga R. Controlling Supramolecular Chiral Nanostructures by Self-Assembly of a Biomimetic β-Sheet-Rich Amyloidogenic Peptide. ACS NANO 2018; 12:9152-9161. [PMID: 30106557 DOI: 10.1021/acsnano.8b03582] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Squid sucker ring teeth (SRT) have emerged as a promising protein-only, thermoplastic biopolymer with an increasing number of biomedical and engineering applications demonstrated in recent years. SRT is a supra-molecular network whereby a flexible, amorphous matrix is mechanically reinforced by nanoconfined β-sheets. The building blocks for the SRT network are a family of suckerin proteins that share a common block copolymer architecture consisting of amorphous domains intervened by smaller, β-sheet forming modules. Recent studies have identified the peptide A1H1 (peptide sequence AATAVSHTTHHA) as one of the most abundant β-sheet forming domains within the suckerin protein family. However, we still have little understanding of the assembly mechanisms by which the A1H1 peptide may assemble into its functional load-bearing domains. In this study, we conduct a detailed self-assembly study of A1H1 and show that the peptide undergoes β-strands-driven elongation into amyloid-like fibrils with a rich polymorphism. The nanostructure of the fibrils was elucidated by small and wide-angle X-ray scattering (SAXS and WAXS) and atomic force microscopy (AFM). The presence of His-rich and Ala-rich segments results in an amphiphilic behavior and drives its assembly into fibrillar supramolecular chiral aggregates with helical ribbon configuration in solution, with the His-rich region exposed to the solvent molecules. Upon increase in concentration, the fibrils undergo gel formation, while preserving the same mesoscopic features. This complex phase behavior suggests that the repeat peptide modules of suckerins may be manipulated beyond their native biological environment to produce a wider variety of self-assembled amyloid-like nanostructures.
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Affiliation(s)
- Antoni Sánchez-Ferrer
- Department of Health Sciences & Technology , ETH Zurich , Zurich CH-8092 , Switzerland
| | - Jozef Adamcik
- Department of Health Sciences & Technology , ETH Zurich , Zurich CH-8092 , Switzerland
| | - Stephan Handschin
- Department of Health Sciences & Technology , ETH Zurich , Zurich CH-8092 , Switzerland
| | - Shu Hui Hiew
- School of Materials Science and Engineering , Nanyang Technological University (NTU) , 639798 , Singapore
| | - Ali Miserez
- School of Materials Science and Engineering , Nanyang Technological University (NTU) , 639798 , Singapore
- School of Biological Sciences , NTU , 637551 , Singapore
| | - Raffaele Mezzenga
- Department of Health Sciences & Technology , ETH Zurich , Zurich CH-8092 , Switzerland
- Department of Materials , ETH Zurich , Zurich CH-8093 , Switzerland
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172
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Figueira TN, Augusto MT, Rybkina K, Stelitano D, Noval MG, Harder OE, Veiga AS, Huey D, Alabi CA, Biswas S, Niewiesk S, Moscona A, Santos NC, Castanho MARB, Porotto M. Effective in Vivo Targeting of Influenza Virus through a Cell-Penetrating/Fusion Inhibitor Tandem Peptide Anchored to the Plasma Membrane. Bioconjug Chem 2018; 29:3362-3376. [PMID: 30169965 DOI: 10.1021/acs.bioconjchem.8b00527] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The impact of influenza virus infection is felt each year on a global scale when approximately 5-10% of adults and 20-30% of children globally are infected. While vaccination is the primary strategy for influenza prevention, there are a number of likely scenarios for which vaccination is inadequate, making the development of effective antiviral agents of utmost importance. Anti-influenza treatments with innovative mechanisms of action are critical in the face of emerging viral resistance to the existing drugs. These new antiviral agents are urgently needed to address future epidemic (or pandemic) influenza and are critical for the immune-compromised cohort who cannot be vaccinated. We have previously shown that lipid tagged peptides derived from the C-terminal region of influenza hemagglutinin (HA) were effective influenza fusion inhibitors. In this study, we modified the influenza fusion inhibitors by adding a cell penetrating peptide sequence to promote intracellular targeting. These fusion-inhibiting peptides self-assemble into ∼15-30 nm nanoparticles (NPs), target relevant infectious tissues in vivo, and reduce viral infectivity upon interaction with the cell membrane. Overall, our data show that the CPP and the lipid moiety are both required for efficient biodistribution, fusion inhibition, and efficacy in vivo.
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Affiliation(s)
- T N Figueira
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , 1649-028 Lisbon , Portugal.,Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States.,Center for Host-Pathogen Interaction , Columbia University Medical Center , New York , New York 10032 , United States
| | - M T Augusto
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , 1649-028 Lisbon , Portugal.,Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States.,Center for Host-Pathogen Interaction , Columbia University Medical Center , New York , New York 10032 , United States
| | - K Rybkina
- Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States
| | - D Stelitano
- Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States
| | - M G Noval
- Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States
| | - O E Harder
- Department of Veterinary Biosciences, College of Veterinary Medicine , The Ohio State University , Columbus , Ohio 43210 , United States
| | - A S Veiga
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , 1649-028 Lisbon , Portugal
| | - D Huey
- Department of Veterinary Biosciences, College of Veterinary Medicine , The Ohio State University , Columbus , Ohio 43210 , United States
| | - C A Alabi
- Robert Frederick Smith School of Chemical and Biomolecular Engineering , Cornell University , Ithaca , New York 14853 , United States
| | - S Biswas
- Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States.,Center for Host-Pathogen Interaction , Columbia University Medical Center , New York , New York 10032 , United States
| | - S Niewiesk
- Department of Veterinary Biosciences, College of Veterinary Medicine , The Ohio State University , Columbus , Ohio 43210 , United States
| | - A Moscona
- Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States.,Center for Host-Pathogen Interaction , Columbia University Medical Center , New York , New York 10032 , United States.,Department of Microbiology & Immunology , Columbia University Medical Center , New York , New York 10032 , United States.,Department of Physiology & Cellular Biophysics , Columbia University Medical Center , New York , New York 10032 , United States
| | - N C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , 1649-028 Lisbon , Portugal
| | - M A R B Castanho
- Instituto de Medicina Molecular, Faculdade de Medicina , Universidade de Lisboa , 1649-028 Lisbon , Portugal
| | - M Porotto
- Department of Pediatrics , Columbia University Medical Center , New York , New York 10032 , United States.,Center for Host-Pathogen Interaction , Columbia University Medical Center , New York , New York 10032 , United States.,Department of Experimental Medicine , University of Campania 'Luigi Vanvitelli' , 81100 Caserta , Caserta , Italy
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173
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Alencar-Silva T, Braga MC, Santana GOS, Saldanha-Araujo F, Pogue R, Dias SC, Franco OL, Carvalho JL. Breaking the frontiers of cosmetology with antimicrobial peptides. Biotechnol Adv 2018; 36:2019-2031. [PMID: 30118811 DOI: 10.1016/j.biotechadv.2018.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/26/2018] [Accepted: 08/12/2018] [Indexed: 01/06/2023]
Abstract
Antimicrobial peptides (AMPs) are mostly endogenous, cationic, amphipathic polypeptides, produced by many natural sources. Recently, many biological functions beyond antimicrobial activity have been attributed to AMPs, and some of these have attracted the attention of the cosmetics industry. AMPs have revealed antioxidant, self-renewal and pro-collagen effects, which are desirable in anti-aging cosmetics. Additionally, AMPs may also be customized to act on specific cellular targets. Here, we review the recent literature that highlights the many possibilities presented by AMPs, focusing on the relevance and impact that this potentially novel class of active cosmetic ingredients might have in the near future, creating new market outlooks for the cosmetic industry with these molecules as a viable alternative to conventional cosmetics.
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Affiliation(s)
- Thuany Alencar-Silva
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - Mariana Carolina Braga
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - Gustavo Oliveira Silva Santana
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - Felipe Saldanha-Araujo
- Laboratório de Farmacologia Molecular, Departamento de Ciências da Saúde, Universidade de Brasília, Brasilia, DF, Brazil; Programa de Pós-graduação em Patologia Molecular, Universidade de Brasília, Brasília, DF, Brazil
| | - Robert Pogue
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil
| | - Simoni Campos Dias
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil; Universidade de Brasília, Pós-Graduação em Biologia Animal, Campus Darcy Ribeiro, Brasília/DF, 70910-900, Brazil
| | - Octavio Luiz Franco
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil; S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, MS, Brazil; Programa de Pós-graduação em Patologia Molecular, Universidade de Brasília, Brasília, DF, Brazil; Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, Brazil
| | - Juliana Lott Carvalho
- Programa de Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil.
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174
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Nikoofard N, Maghsoodi F. Dynamic stability of nano-fibers self-assembled from short amphiphilic A 6D peptides. J Chem Phys 2018; 148:134903. [PMID: 29626855 DOI: 10.1063/1.5019766] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Self-assembly of A6D amphiphilic peptides in explicit water is studied by using coarse-grained molecular dynamics simulations. It is observed that the self-assembly of randomly distributed A6D peptides leads to the formation of a network of nano-fibers. Two other simulations with cylindrical nano-fibers as the initial configuration show the dynamic stability of the self-assembled nano-fibers. As a striking feature, notable fluctuations occur along the axes of the nano-fibers. Depending on the number of peptides per unit length of the nano-fiber, flat-shaped bulges or spiral shapes along the nano-fiber axis are observed at the fluctuations. Analysis of the particle distribution around the nano-fiber indicates that the hydrophobic core and the hydrophilic shell of the nano-structure are preserved in both simulations. The size of the deformations and their correlation times are different in the two simulations. This study gives new insights into the dynamics of the self-assembled nano-structures of short amphiphilic peptides.
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Affiliation(s)
- Narges Nikoofard
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 51167-87317, Iran
| | - Fahimeh Maghsoodi
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan 51167-87317, Iran
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175
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Dikecoglu FB, Topal AE, Ozkan AD, Tekin ED, Tekinay AB, Guler MO, Dana A. Force and time-dependent self-assembly, disruption and recovery of supramolecular peptide amphiphile nanofibers. NANOTECHNOLOGY 2018; 29:285701. [PMID: 29664418 DOI: 10.1088/1361-6528/aabeb4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Biological feedback mechanisms exert precise control over the initiation and termination of molecular self-assembly in response to environmental stimuli, while minimizing the formation and propagation of defects through self-repair processes. Peptide amphiphile (PA) molecules can self-assemble at physiological conditions to form supramolecular nanostructures that structurally and functionally resemble the nanofibrous proteins of the extracellular matrix, and their ability to reconfigure themselves in response to external stimuli is crucial for the design of intelligent biomaterials systems. Here, we investigated real-time self-assembly, deformation, and recovery of PA nanofibers in aqueous solution by using a force-stabilizing double-pass scanning atomic force microscopy imaging method to disrupt the self-assembled peptide nanofibers in a force-dependent manner. We demonstrate that nanofiber damage occurs at tip-sample interaction forces exceeding 1 nN, and the damaged fibers subsequently recover when the tip pressure is reduced. Nanofiber ends occasionally fail to reconnect following breakage and continue to grow as two individual nanofibers. Energy minimization calculations of nanofibers with increasing cross-sectional ellipticity (corresponding to varying levels of tip-induced fiber deformation) support our observations, with high-ellipticity nanofibers exhibiting lower stability compared to their non-deformed counterparts. Consequently, tip-mediated mechanical forces can provide an effective means of altering nanofiber integrity and visualizing the self-recovery of PA assemblies.
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Affiliation(s)
- F Begum Dikecoglu
- Institute of Materials Science and Nanotechnology and National Nanotechnology Research Center (UNAM), Bilkent University, Ankara, 06800, Turkey. Institute of Biophysics, Johannes Kepler University Linz, Gruberstrasse 40, A-4020 Linz, Austria
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176
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Singh R, Kumar Mishra N, Kumar V, Vinayak V, Ballabh Joshi K. Transition Metal Ion-Mediated Tyrosine-Based Short-Peptide Amphiphile Nanostructures Inhibit Bacterial Growth. Chembiochem 2018; 19:1630-1637. [PMID: 29771457 DOI: 10.1002/cbic.201800220] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Indexed: 12/29/2022]
Abstract
We report the design and synthesis of a biocompatible small-peptide-based compound for the controlled and targeted delivery of encapsulated bioactive metal ions through transformation of the internal nanostructures of its complexes. A tyrosine-based short-peptide amphiphile (sPA) was synthesized and observed to self-assemble into β-sheet-like secondary structures. The self-assembly of the designed sPA was modulated by application of different bioactive transition-metal ions, as was confirmed by spectroscopic and microscopic techniques. These bioactive metal-ion-conjugated sPA hybrid structures were further used to develop antibacterial materials. As a result of the excellent antibacterial activity of zinc ions the growth of clinically relevant bacteria such as Escherichia coli was inhibited in the presence of zinc⋅sPA conjugate. Bacterial testing demonstrated that, due to high biocompatibility with bacterial cells, the designed sPA acted as a metal ion delivery agent and might therefore show great potential in locally addressing bacterial infections.
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Affiliation(s)
- Ramesh Singh
- Department of Chemistry, School of Chemical Science and Technology, Dr. Harisingh Gour Central University, Sagar, MP, 470003, India
| | - Narendra Kumar Mishra
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark
| | - Vikas Kumar
- Department of Chemistry, School of Chemical Science and Technology, Dr. Harisingh Gour Central University, Sagar, MP, 470003, India
| | - Vandana Vinayak
- Diatom Nanoengineering and Metabolism Lab (DNM), School of Applied Sciences, Dr. Harisingh Gour Central University, Sagar, MP, 470003, India
| | - Khashti Ballabh Joshi
- Department of Chemistry, School of Chemical Science and Technology, Dr. Harisingh Gour Central University, Sagar, MP, 470003, India
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177
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Abstract
Self-assembled peptide nanostructures have been increasingly exploited as functional materials for applications in biomedicine and energy. The emergent properties of these nanomaterials determine the applications for which they can be exploited. It has recently been appreciated that nanomaterials composed of multicomponent coassembled peptides often display unique emergent properties that have the potential to dramatically expand the functional utility of peptide-based materials. This review presents recent efforts in the development of multicomponent peptide assemblies. The discussion includes multicomponent assemblies derived from short low molecular weight peptides, peptide amphiphiles, coiled coil peptides, collagen, and β-sheet peptides. The design, structure, emergent properties, and applications for these multicomponent assemblies are presented in order to illustrate the potential of these formulations as sophisticated next-generation bio-inspired materials.
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Affiliation(s)
- Danielle M Raymond
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
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178
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Castelletto V, Barnes RH, Karatzas KA, Edwards-Gayle CJC, Greco F, Hamley IW, Rambo R, Seitsonen J, Ruokolainen J. Arginine-Containing Surfactant-Like Peptides: Interaction with Lipid Membranes and Antimicrobial Activity. Biomacromolecules 2018; 19:2782-2794. [PMID: 29738229 DOI: 10.1021/acs.biomac.8b00391] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The activity of antimicrobial peptides stems from their interaction with bacterial membranes, which are disrupted according to a number of proposed mechanisms. Here, we investigate the interaction of a model antimicrobial peptide that contains a single arginine residue with vesicles containing model lipid membranes. The surfactant-like peptide Ala6-Arg (A6R) is studied in the form where both termini are capped (CONH-A6R-NH2, capA6R) or uncapped (NH2-A6R-OH, A6R). Lipid membranes are selected to correspond to model anionic membranes (POPE/POPG) resembling those in bacteria or model zwitterionic membranes (POPC/DOPC) similar to those found in mammalian cells. Viable antimicrobial agents should show activity against anionic membranes but not zwitterionic membranes. We find, using small-angle X-ray scattering (SAXS) and cryogenic-TEM (transmission electron microscopy) that, uniquely, capA6R causes structuring of anionic membranes due to the incorporation of the peptide in the lipid bilayer with peptide β-sheet conformation revealed by circular dichroism spectroscopy (CD). There is a preferential interaction of the peptide with POPG (which is the only anionic lipid in the systems studied) due to electrostatic interactions and bidentate hydrogen bonding between arginine guanidinium and lipid phosphate groups. At a certain composition, this peptide leads to the remarkable tubulation of zwitterionic phosphatidylcholine (PC) vesicles, which is ascribed to the interaction of the peptide with the outer lipid membrane, which occurs without penetration into the membrane. In contrast, peptide A6R has a minimal influence on the anionic lipid membranes (and no β-sheet peptide structure is observed) but causes thinning (lamellar decorrelation) of zwitterionic membranes. We also investigated the cytotoxicity (to fibroblasts) and antimicrobial activity of these two peptides against model Gram positive and Gram negative bacteria. A strong selective antimicrobial activity against Gram positive Listeria monocytogenes, which is an important food-borne pathogen, is observed for capA6R. Peptide A6R is active against all three studied bacteria. The activity of the peptides against bacteria and mammalian cells is related to the specific interactions uncovered through our SAXS, cryo-TEM, and CD measurements. Our results highlight the exquisite sensitivity to the charge distribution in these designed peptides and its effect on the interaction with lipid membranes bearing different charges, and ultimately on antimicrobial activity.
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Affiliation(s)
- Valeria Castelletto
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ruth H Barnes
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Kimon-Andreas Karatzas
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Charlotte J C Edwards-Gayle
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Francesca Greco
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Ian W Hamley
- School of Chemistry, Food Biosciences and Pharmacy , University of Reading , Whiteknights , Reading RG6 6AD , United Kingdom
| | - Robert Rambo
- Diamond Light Source , Harwell Science and Innovation Campus , Didcot, Oxfordshire OX11 0DE , United Kingdom
| | - Jani Seitsonen
- Department of Applied Physics , Aalto School of Science , P.O. Box 15100, FI-00076 Aalto , Finland
| | - Janne Ruokolainen
- Department of Applied Physics , Aalto School of Science , P.O. Box 15100, FI-00076 Aalto , Finland
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179
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Thurston BA, Ferguson AL. Machine learning and molecular design of self-assembling -conjugated oligopeptides. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1469754] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Bryce A. Thurston
- Department of Physics, University of Illinois at Urbana-Champaign , Urbana, IL, USA
| | - Andrew L. Ferguson
- Department of Physics, University of Illinois at Urbana-Champaign , Urbana, IL, USA
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign , Urbana, IL, USA
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign , Urbana, IL, USA
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180
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Edwards-Gayle CJC, Hamley IW. Self-assembly of bioactive peptides, peptide conjugates, and peptide mimetic materials. Org Biomol Chem 2018; 15:5867-5876. [PMID: 28661532 DOI: 10.1039/c7ob01092c] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Molecular self-assembly is a multi-disciplinary field of research, with potential chemical and biological applications. One of the main driving forces of self-assembly is molecular amphiphilicity, which can drive formation of complex and stable nanostructures. Self-assembling peptide and peptide conjugates have attracted great attention due to their biocompatibility, biodegradability and biofunctionality. Understanding assembly enables the better design of peptide amphiphiles which may form useful and functional nanostructures. This review covers self-assembly of amphiphilic peptides and peptide mimetic materials, as well as their potential applications.
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Affiliation(s)
| | - Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK.
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181
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Lau KHA, Castelletto V, Kendall T, Sefcik J, Hamley IW, Reza M, Ruokolainen J. Self-assembly of ultra-small micelles from amphiphilic lipopeptoids. Chem Commun (Camb) 2018; 53:2178-2181. [PMID: 28144675 DOI: 10.1039/c6cc09888f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Poly(N-substituted glycine) "peptoids" constitute a promising class of peptide-mimetic materials. We introduce the self-assembly of lipopeptoids into spherical micelles ca. 5 nm in diameter as well as larger assemblies by varying the peptoid sequence design. Our results point to design rules for the self-assembly of peptoid nanostructures, enabling the creation of stable, ultra-small peptidomimetic nanospheres.
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Affiliation(s)
- King Hang Aaron Lau
- WestCHEM/Department of Pure & Applied Chemistry, University of Strathclyde, 99 George Street, Glasgow, G1 1RD, UK.
| | - Valeria Castelletto
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK.
| | - Thomas Kendall
- EPSRC Doctoral Training Centre in Continuous Manufacturing and Crystallisation, Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK
| | - Jan Sefcik
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK
| | - Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK.
| | - Mehedi Reza
- Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076, Aalto, Finland
| | - Janne Ruokolainen
- Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076, Aalto, Finland
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182
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Wu D, Zhang S, Zhao Y, Ao N, Ramakrishna S, He L. The effects of motif net charge and amphiphilicity on the self-assembly of functionally designer RADA16-I peptides. ACTA ACUST UNITED AC 2018; 13:035011. [PMID: 29546848 DOI: 10.1088/1748-605x/aab2fd] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
RADA16-I (Ac-(RADA)4-CONH2) is a widely investigated self-assembling peptide (SAP) in the biomedical field. It can undergo ordered self-assembly to form stable secondary structures, thereby further forming a nanofiber hydrogel. The modification of RADA16-I with functional peptide motifs has become a popular research topic. Researchers aim to exhibit particular biomedical signaling, and subsequently, further expand its applications. However, only a few fundamental reports are available on the influences of the peptide motifs on self-assembly mechanisms of designer functional RADA16-I SAPs. In this study, we designed RGD-modified RADA16-I SAPs with a series of net charges and amphiphilicities. The assembly/reassembly of these functionally designer SAPs was thoroughly studied using Raman spectroscopy, CD spectroscopy, and AFM. The nanofiber morphology and the secondary structure largely depended on the balance between the hydrophobic effects versus like-charge repulsions of the motifs, which should be to the focus in order to achieve a tailored nanostructure. Our study would contribute insight into considerations for sophisticated design of SAPs for biomedical applications.
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Affiliation(s)
- Dongni Wu
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, People's Republic of China. MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou 510632, People's Republic of China
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183
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Fraczyk J, Lipinski W, Chaberska A, Wasko J, Rozniakowski K, Kaminski ZJ, Bogun M, Draczynski Z, Menaszek E, Stodolak-Zych E, Kaminska M, Kolesinska B. Search for Fibrous Aggregates Potentially Useful in Regenerative Medicine Formed under Physiological Conditions by Self-Assembling Short Peptides Containing Two Identical Aromatic Amino Acid Residues. Molecules 2018; 23:E568. [PMID: 29498711 PMCID: PMC6017032 DOI: 10.3390/molecules23030568] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/26/2018] [Accepted: 02/28/2018] [Indexed: 12/26/2022] Open
Abstract
This study investigates the propensity of short peptides to self-organize and the influence of aggregates on cell cultures. The dipeptides were derived from both enantiomers of identical aromatic amino acids and tripeptides were prepared from two identical aromatic amino acids with one cysteine or methionine residue in the C-terminal, N-terminal, or central position. The formation or absence of fibrous structures under physiological conditions was established using Congo Red and Thioflavine T assays as well as by microscopic examination using normal and polarized light. The in vitro stability of the aggregates in buffered saline solution was assessed over 30 days. Materials with potential for use in regenerative medicine were selected based on the cytotoxicity of the peptides to the endothelial cell line EA.hy 926 and the wettability of the surfaces of the films, as well as using scanning electron microscopy. The criteria were fulfilled by H-dPhedPhe-OH, H-dCysdPhedPhe-OH, H-CysTyrTyr-OH, H-dPhedPhedCys-OH, H-TyrTyrMet-OH, and H-TyrMetTyr-OH. Our preliminary results suggest that the morphology and cell viability of L919 fibroblast cells do not depend on the stereochemistry of the self-organizing peptides.
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Affiliation(s)
- Justyna Fraczyk
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Wojciech Lipinski
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Agata Chaberska
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Joanna Wasko
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Kamil Rozniakowski
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Zbigniew J Kaminski
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Maciej Bogun
- Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Zbigniew Draczynski
- Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
| | - Elzbieta Menaszek
- Department of Cytology, CMUJ-Jagiellonian University Medical College, Swietej Anny 12, 31-008 Krakow, Poland.
| | - Ewa Stodolak-Zych
- AGH-University of Science and Technology, Department of Biomaterials, A. Mickiewicz 30, 30-059 Krakow, Poland.
| | - Marta Kaminska
- Division of Biophysics, Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland.
| | - Beata Kolesinska
- Institute of Organic Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
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184
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Novelli F, De Santis S, Morosetti S, Titubante M, Masci G, Scipioni A. Peptides with regularly alternating enantiomeric sequence: From ion channel models to bioinspired nanotechnological applications. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Federica Novelli
- Dipartimento di ChimicaUniversità La Sapienza, Piazzale A. MoroRome5‐00185 Italy
| | - Serena De Santis
- Dipartimento di ChimicaUniversità La Sapienza, Piazzale A. MoroRome5‐00185 Italy
| | - Stefano Morosetti
- Dipartimento di ChimicaUniversità La Sapienza, Piazzale A. MoroRome5‐00185 Italy
| | - Mattia Titubante
- Dipartimento di ChimicaUniversità La Sapienza, Piazzale A. MoroRome5‐00185 Italy
| | - Giancarlo Masci
- Dipartimento di ChimicaUniversità La Sapienza, Piazzale A. MoroRome5‐00185 Italy
| | - Anita Scipioni
- Dipartimento di ChimicaUniversità La Sapienza, Piazzale A. MoroRome5‐00185 Italy
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185
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Kornmueller K, Lehofer B, Leitinger G, Amenitsch H, Prassl R. Peptide self-assembly into lamellar phases and the formation of lipid-peptide nanostructures. NANO RESEARCH 2018; 11:913-928. [PMID: 29372005 PMCID: PMC5777605 DOI: 10.1007/s12274-017-1702-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Lipids exhibit an extraordinary polymorphism in self-assembled mesophases, with lamellar phases as biologically most relevant representative. To mimic lipid lamellar phases with amphiphilic designer peptides, seven systematically varied short peptides were engineered. Indeed, four peptide candidates (V4D, V4WD, V4WD2, I4WD2) readily self-assembled into lamellae in aqueous solution: small-angle X-ray scattering patterns (SAXS) revealed ordered lamellar structures with a repeat distance of ~4-5 nm. Transmission electron microscopy (TEM) images confirmed the presence of stacked sheets. Two derivatives (V3D and V4D2) remained as loose aggregates dispersed in solution; one peptide (L4WD2) formed twisted tapes with internal lamellae and an antiparallel β-type monomer alignment. To understand the interaction of peptides with lipids they were mixed with phosphatidylcholines. Low peptide concentrations (1.1 mM) induced the formation of a heterogeneous mixture of vesicular structures: large multilamellar vesicles (d-spacing ~6.3 nm) coexisted with oligo- or unilamellar vesicles (~50 nm in diameter) and bicelle-like structures (~45 nm length, ~18 nm width). High peptide concentrations (11 mM) led to unilamellar vesicles (ULV, diameter ~260-280 nm) with a homogeneous mixing of lipids and peptides. SAXS revealed the temperature-dependent fine structure of these ULVs: at 25 °C the bilayer is in a fully interdigitated state (headgroup-to-headgroup distance dhh ~2.9 nm), whereas at 50 °C this interdigitation opens up (dhh ~3.6 nm). Our results highlight the versatility of self-assembled peptide superstructures: subtle changes in the amino acid composition are key design elements in creating peptide- or lipid-peptide nanostructures with the same richness in morphology as known from the lipid-world.
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Affiliation(s)
- Karin Kornmueller
- Institute of Biophysics, Medical University of Graz,
BioTechMed-Graz, Graz 8010, Austria
| | - Bernhard Lehofer
- Institute of Biophysics, Medical University of Graz,
BioTechMed-Graz, Graz 8010, Austria
| | - Gerd Leitinger
- Institute of Cell Biology, Histology and Embryology, Research Unit
Electron Microscopic Techniques, Medical University of Graz, Graz 8010,
Austria
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology,
Graz 8010, Austria
| | - Ruth Prassl
- Institute of Biophysics, Medical University of Graz,
BioTechMed-Graz, Graz 8010, Austria
- Address correspondence to Ruth Prassl,
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186
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Sequence length dependence in arginine/phenylalanine oligopeptides: Implications for self-assembly and cytotoxicity. Biophys Chem 2018; 233:1-12. [DOI: 10.1016/j.bpc.2017.11.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/28/2017] [Accepted: 11/28/2017] [Indexed: 12/13/2022]
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187
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Goel R, Garg C, Gautam HK, Sharma AK, Kumar P, Gupta A. Fabrication of cationic nanostructures from short self-assembling amphiphilic mixed α/β-pentapeptide: Potential candidates for drug delivery, gene delivery, and antimicrobial applications. Int J Biol Macromol 2018; 111:880-893. [PMID: 29355630 DOI: 10.1016/j.ijbiomac.2018.01.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/11/2018] [Accepted: 01/12/2018] [Indexed: 12/18/2022]
Abstract
The present article describes designing and fabrication of nanostructures from a mixed α/β-pentapeptide, Lys-βAla-βAla-Lys-βAla, which majorly contains non-natural β-alanine residues in the backbone with two α-lysine residues at 1- and 4-positions. The amphiphilic pentapeptide showed the ability to self-assemble into cationic nanovesicles in an aqueous solution. The average size of peptide nanostructures was found to be ~270 nm with a very high cationic charge of ~+40 mV. TEM micrographs revealed the average size of the same nanostructures ~80 nm bearing vesicular morphology. CD and FTIR spectroscopic studies on self-assembled pentapeptide hinted at random coil conformation which was also correlated with conformational search program using Hyper Chem 8.0. The pentapeptide nanostructures were then tested for encapsulation of hydrophobic model drug moieties, L-Dopa, and curcumin. Transfection efficiency of the generated cationic nanostructures was evaluated on HEK293 cells and compared the results with those obtained in the presence of chloroquine. The cytotoxicity assay performed using MTT depicted ~75-80% cell viability. The obtained nanostructures also gave positive results against both Gram-negative and Gram-positive bacterial strains. Altogether the results advocate the promising potential of the pentapeptide foldamer, H-Lys-βAla-βAla-Lys-βAla-OEt, for drug and gene delivery applications along with the antimicrobial activity.
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Affiliation(s)
- Rahul Goel
- Department of Chemistry, Dyal Singh College, University of Delhi, Lodhi Road, New Delhi 110003, India
| | - Charu Garg
- Department of Chemistry, Dyal Singh College, University of Delhi, Lodhi Road, New Delhi 110003, India; Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi 110007, India
| | - Hemant Kumar Gautam
- Microbial Technology Laboratory, CSIR-Institute of Genomics and Integrative Biology, Sukhdev Vihar, Mathura Road, New Delhi 110025, India
| | - Ashwani Kumar Sharma
- Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi 110007, India
| | - Pradeep Kumar
- Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi 110007, India
| | - Alka Gupta
- Department of Chemistry, Dyal Singh College, University of Delhi, Lodhi Road, New Delhi 110003, India.
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188
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Methods to Characterize the Nanostructure and Molecular Organization of Amphiphilic Peptide Assemblies. Methods Mol Biol 2018; 1777:3-21. [PMID: 29744826 DOI: 10.1007/978-1-4939-7811-3_1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Methods to characterize the nanostructure and molecular organization of aggregates of peptides such as amyloid or amphiphilic peptide assemblies are reviewed. We discuss techniques to characterize conformation and secondary structure including circular and linear dichroism and FTIR and Raman spectroscopies, as well as fluorescence methods to detect aggregation. NMR spectroscopy methods, especially solid-state NMR measurements to probe beta-sheet packing motifs, are also briefly outlined. Also discussed are scattering methods including X-ray diffraction and small-angle scattering techniques including SAXS (small-angle X-ray scattering) and SANS (small-angle neutron scattering) and dynamic light scattering. Imaging methods are direct methods to uncover features of peptide nanostructures, and we provide a summary of electron microscopy and atomic force microscopy techniques. Selected examples are highlighted showing data obtained using these techniques, which provide a powerful suite of methods to probe ordering from the molecular scale to the aggregate superstructure.
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189
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Yao L, He M, Li D, Tian J, Liu H, Xiao J. Terminal aspartic acids promote the self-assembly of collagen mimic peptides into nanospheres. RSC Adv 2018; 8:2404-2409. [PMID: 35541475 PMCID: PMC9077330 DOI: 10.1039/c7ra11855d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 01/03/2018] [Indexed: 01/22/2023] Open
Abstract
The development of novel strategies to construct collagen mimetic peptides capable of self-assembling into higher-order structures plays a critical role in the discovery of functional biomaterials. We herein report the construction of a novel type of amphiphile-like peptide conjugating the repetitive triple helical (GPO)m sequences characteristic of collagen with terminal hydrophilic aspartic acids. The amphiphile-like collagen mimic peptides containing a variable length of (Gly-Pro-Hyp)m sequences consistently generate well-ordered nanospherical supramolecular structures. The C-terminal aspartic acids have been revealed to play a determinant role in the appropriate self-assembly of amphiphile-like collagen mimic peptides. Their presence is a prerequisite for self-assembly, and their lengths could modulate the morphology of final assemblies. We have demonstrated for the first time that amphiphile-like collagen mimic peptides with terminal aspartic acids may provide a general and convenient strategy to create well-defined nanostructures in addition to amphiphile-like peptides utilizing β-sheet or α-helical coiled-coil motifs. The newly developed assembly strategy together with the ubiquitous natural function of collagen may lead to the generation of novel improved biomaterials. Amphiphile-like collagen mimic peptides with terminal aspartic acids may provide a general and convenient strategy to create well-defined nanostructures.![]()
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Affiliation(s)
- Linyan Yao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Meta Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Manman He
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Meta Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Dongfang Li
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Meta Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Jing Tian
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Meta Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
| | - Huanxiang Liu
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Jianxi Xiao
- State Key Laboratory of Applied Organic Chemistry
- Key Laboratory of Nonferrous Meta Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
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190
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Pizzi A, Demitri N, Terraneo G, Metrangolo P. Halogen bonding at the wet interfaces of an amyloid peptide structure. CrystEngComm 2018. [DOI: 10.1039/c8ce01205a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Halogenation is a promising tool to stabilize – through halogen bonds – the wet interface of amyloid structures.
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Affiliation(s)
- Andrea Pizzi
- Laboratory of Supramolecular and Bio-Nanomaterials (SBNLab)
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- Milano I-20131
- Italy
| | - Nicola Demitri
- Elettra – Sincrotrone Trieste
- 34149 Basovizza – Trieste
- Italy
| | - Giancarlo Terraneo
- Laboratory of Supramolecular and Bio-Nanomaterials (SBNLab)
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- Milano I-20131
- Italy
| | - Pierangelo Metrangolo
- Laboratory of Supramolecular and Bio-Nanomaterials (SBNLab)
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- Milano I-20131
- Italy
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191
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192
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Arad E, Malishev R, Rapaport H, Jelinek R. Membrane Determinants Affect Fibrillation Processes of β-Sheet Charged Peptides. Biomacromolecules 2017; 19:307-314. [DOI: 10.1021/acs.biomac.7b01318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elad Arad
- Department of Chemistry, ‡Avram and Stella Goldstein-Goren Department of Biotechnology
Engineering, and §Ilse Katz Institute for Nano-Science and Technology (IKI), Ben Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Ravit Malishev
- Department of Chemistry, ‡Avram and Stella Goldstein-Goren Department of Biotechnology
Engineering, and §Ilse Katz Institute for Nano-Science and Technology (IKI), Ben Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Hanna Rapaport
- Department of Chemistry, ‡Avram and Stella Goldstein-Goren Department of Biotechnology
Engineering, and §Ilse Katz Institute for Nano-Science and Technology (IKI), Ben Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Raz Jelinek
- Department of Chemistry, ‡Avram and Stella Goldstein-Goren Department of Biotechnology
Engineering, and §Ilse Katz Institute for Nano-Science and Technology (IKI), Ben Gurion University of the Negev, Beer Sheva 84105, Israel
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193
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Hiew SH, Sánchez-Ferrer A, Amini S, Zhou F, Adamcik J, Guerette P, Su H, Mezzenga R, Miserez A. Squid Suckerin Biomimetic Peptides Form Amyloid-like Crystals with Robust Mechanical Properties. Biomacromolecules 2017; 18:4240-4248. [PMID: 29112414 DOI: 10.1021/acs.biomac.7b01280] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We present the self-assembly of fibers formed from a peptide sequence (A1H1) derived from suckerin proteins of squid sucker ring teeth (SRT). SRT are protein-only biopolymers with an unconventional set of physicochemical and mechanical properties including high elastic modulus coupled with thermoplastic behavior. We have identified a conserved peptide building block from suckerins that possess the ability to assemble into materials with similar mechanical properties as the native SRT. A1H1 displays amphiphilic characteristics and self-assembles from the bottom-up into mm-scale fibers initiated by the addition of a polar aprotic solvent. A1H1 fibers are thermally resistant up to 239 °C, coupled with an elastic modulus of ∼7.7 GPa, which can be explained by the tight packing of β-sheet-enriched crystalline building blocks as identified by wide-angle X-ray scattering (WAXS), with intersheet and interstrand distances of 5.37 and 4.38 Å, respectively. A compact packing of the peptides at their Ala-rich terminals within the fibers was confirmed from molecular dynamics simulations, and we propose a hierarchical model of fiber assembly of the mature peptide fiber.
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Affiliation(s)
- Shu Hui Hiew
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
| | - Antoni Sánchez-Ferrer
- Department of Health Sciences & Technology, ETH Zurich , Zurich CH-8092, CH-8093, Switzerland
| | - Shahrouz Amini
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
| | - Feng Zhou
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
| | - Jozef Adamcik
- Department of Health Sciences & Technology, ETH Zurich , Zurich CH-8092, CH-8093, Switzerland
| | - Paul Guerette
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
| | - Haibin Su
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore
| | - Raffaele Mezzenga
- Department of Health Sciences & Technology, ETH Zurich , Zurich CH-8092, CH-8093, Switzerland
| | - Ali Miserez
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore.,School of Biological Sciences, Nanyang Technological University , Singapore 637551, Singapore
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194
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Tong L, Wang Z, Xia C, Yang Y, Yuan S, Sun D, Xin X. Self-Assembly of Peptide-Polyoxometalate Hybrid Sub-Micrometer Spheres for Photocatalytic Degradation of Methylene Blue. J Phys Chem B 2017; 121:10566-10573. [DOI: 10.1021/acs.jpcb.7b07100] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Lu Tong
- National
Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Zhi Wang
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
| | - Congxin Xia
- National
Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Yingjie Yang
- National
Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Shiling Yuan
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
| | - Di Sun
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
| | - Xia Xin
- National
Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, P. R. China
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195
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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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196
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Conjugation with L,L-diphenylalanine Self-Assemblies Enhances In Vitro Antitumor Activity of Phthalocyanine Photosensitizer. Sci Rep 2017; 7:13166. [PMID: 29030603 PMCID: PMC5640658 DOI: 10.1038/s41598-017-13729-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 09/27/2017] [Indexed: 11/18/2022] Open
Abstract
We present the synthesis and characterization of new peptide conjugates obtained by hierarchical co-assembly of L,L-diphenylalanine (FF) and zinc phthalocyanine complexes (ZnPc) in water. Self-assembly capabilities under defined conditions were investigated by scanning electron microscopy, and photophysical properties were evaluated using UV-Vis and fluorescence spectroscopy. AFM observations demonstrated that these ZnPcs form different highly ordered arrays on the crystalline faces of the FF microplates and that surface roughness significantly changes with the presence of differently substituted phthalocyanine units. XRD assays showed that the overall molecular packing of the conjugates is organized according to a hexagonal symmetry, with ZnPcs hosted in the interstices of the peptide phase. In vitro photodynamic studies were conducted on human breast cancer MCF-7 cells to investigate both cellular uptake and cytotoxicity. It was shown that FF self-assemblies are not toxicity and enhance accumulation of ZnPc in MCF-7 cells, improving apoptotic cell death upon irradiation. Our findings demonstrate enhancement of ZnPc antitumor efficiency by FF conjugates and a proof-of-concept for new photosensitizer carriers based on peptide conjugates.
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197
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Manandhar A, Kang M, Chakraborty K, Tang PK, Loverde SM. Molecular simulations of peptide amphiphiles. Org Biomol Chem 2017; 15:7993-8005. [PMID: 28853474 PMCID: PMC5744600 DOI: 10.1039/c7ob01290j] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This review describes recent progress in the area of molecular simulations of peptide assemblies, including peptide-amphiphiles and drug-amphiphiles. The ability to predict the structure and stability of peptide self-assemblies from the molecular level up is vital to the field of nanobiotechnology. Computational methods such as molecular dynamics offer the opportunity to characterize intermolecular forces between peptide-amphiphiles that are critical to the self-assembly process. Furthermore, these computational methods provide the ability to computationally probe the structure of these supramolecular assemblies at the molecular level, which is a challenge experimentally. Herein, we briefly highlight progress in the areas of all-atomistic and coarse-grained simulation studies investigating the self-assembly process of short peptides and peptide amphiphiles. We also discuss recent all-atomistic and coarse-grained simulations of the self-assembly of a drug-amphiphile into elongated filaments. Next, we discuss how these computational methods can provide further insight into the pathway of cylindrical nanofiber formation and predict their biocompatibility by studying the interaction of these peptide-amphiphile nanostructures with model cell membranes.
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Affiliation(s)
- Anjela Manandhar
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, NY 10314, USA.
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198
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Malaspina T, de Oliveira Outi F, Colherinhas G, Fileti EE. Hydration properties of the polyalanines by atomistic molecular dynamics. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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199
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Ling K, Men F, Wang WC, Zhou YQ, Zhang HW, Ye DW. Carbon Monoxide and Its Controlled Release: Therapeutic Application, Detection, and Development of Carbon Monoxide Releasing Molecules (CORMs). J Med Chem 2017; 61:2611-2635. [PMID: 28876065 DOI: 10.1021/acs.jmedchem.6b01153] [Citation(s) in RCA: 174] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Carbon monoxide (CO) is attracting increasing attention because of its role as a gasotransmitter with cytoprotective and homeostatic properties. Carbon monoxide releasing molecules (CORMs) are spatially and temporally controlled CO releasers that exhibit superior and more effective pharmaceutical traits than gaseous CO because of their chemistry and structure. Experimental and preclinical research in animal models has shown the therapeutic potential of inhaled CO and CORMs, and the biological effects of CO and CORMs have also been observed in preclinical trials via the genetic modulation of heme oxygenase-1 (HO-1). In this review, we describe the pharmaceutical use of CO and CORMs, methods of detecting CO release, and developments in CORM design and synthesis. Many valuable clinical CORMs formulated using macromolecules and nanomaterials are also described.
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Affiliation(s)
- Ken Ling
- Cancer Center, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430030 , China.,Department of Anesthesiology, Union Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430030 , China
| | - Fang Men
- College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , China
| | - Wei-Ci Wang
- Department of Vascular Surgery, Union Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430030 , China
| | - Ya-Qun Zhou
- Anesthesiology Institute, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430030 , China
| | - Hao-Wen Zhang
- Cancer Center, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430030 , China
| | - Da-Wei Ye
- Cancer Center, Tongji Hospital, Tongji Medical College , Huazhong University of Science and Technology , Wuhan 430030 , China
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200
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Padnya PL, Khripunova IA, Mostovaya OA, Mukhametzyanov TA, Evtugyn VG, Vorobev VV, Osin YN, Stoikov II. Self-assembly of chiral fluorescent nanoparticles based on water-soluble L-tryptophan derivatives of p-tert-butylthiacalix[4]arene. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:1825-1835. [PMID: 29046831 PMCID: PMC5629409 DOI: 10.3762/bjnano.8.184] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 08/07/2017] [Indexed: 05/27/2023]
Abstract
New water-soluble tetra-substituted derivatives of p-tert-butylthiacalix[4]arene containing fragments of L-tryptophan in cone and 1,3-alternate conformations were obtained. It was shown that the resulting compounds form stable, positively charged aggregates of 86-134 nm in diameter in water at a concentration of 1 × 10-4 M as confirmed by dynamic light scattering, scanning electron microscopy and transmission electron microscopy. It was established that these aggregates are fluorescently active and chiral. A distinctive feature of the compounds is the pronounced dependence of their spectral (emission and chiroptical) properties on the polarity of the solvent and the length of the linker between the macrocyclic and fluorophore parts of the molecule.
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Affiliation(s)
- Pavel L Padnya
- Kazan Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation
- Peoples Friendship University of Russia (RUDN University), 117198 Miklukho-Maklaya St., 6, Moscow, Russian Federation
| | - Irina A Khripunova
- Kazan Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation
| | - Olga A Mostovaya
- Kazan Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation
| | | | - Vladimir G Evtugyn
- Kazan Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation
| | | | - Yuri N Osin
- Kazan Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation
| | - Ivan I Stoikov
- Kazan Federal University, 420008 Kremlevskaya, 18, Kazan, Russian Federation
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