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Sonani RR, Bianco S, Dietrich B, Doutch J, Draper ER, Adams DJ, Egelman EH. Atomic structures of naphthalene dipeptide micelles unravel mechanisms of assembly and gelation. CELL REPORTS. PHYSICAL SCIENCE 2024; 5:101812. [PMID: 38464674 PMCID: PMC10922087 DOI: 10.1016/j.xcrp.2024.101812] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Peptide-based biopolymers have gained increasing attention due to their versatile applications. A naphthalene dipeptide (2NapFF) can form chirality-dependent tubular micelles, leading to supramolecular gels. The precise molecular arrangement within these micelles and the mechanism governing gelation have remained enigmatic. We determined, at near-atomic resolution, cryoelectron microscopy structures of the 2NapFF micelles LL-tube and LD-tube, generated by the stereoisomers (l,l)-2NapFF and (l,d)-2NapFF, respectively. The structures reveal that the fundamental packing of dipeptides is driven by the systematic π-π stacking of aromatic rings and that same-charge repulsion between the carbonyl groups is responsible for the stiffness of both tubes. The structural analysis elucidates how a single residue's altered chirality gives rise to markedly distinct tubular structures and sheds light on the mechanisms underlying the pH-dependent gelation of LL- and LD-tubes. The understanding of dipeptide packing and gelation mechanisms provides insights for the rational design of 2NapFF derivatives, enabling the modulation of micellar dimensions.
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Affiliation(s)
- Ravi R. Sonani
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22903, USA
| | - Simona Bianco
- School of Chemistry, University of Glasgow, G12 8QQ Glasgow, UK
| | - Bart Dietrich
- School of Chemistry, University of Glasgow, G12 8QQ Glasgow, UK
| | - James Doutch
- ISIS Pulsed Neutron and Muon Source, Harwell Science and Innovation Campus, OX11 0QX Didcot, UK
| | - Emily R. Draper
- School of Chemistry, University of Glasgow, G12 8QQ Glasgow, UK
| | - Dave J. Adams
- School of Chemistry, University of Glasgow, G12 8QQ Glasgow, UK
| | - Edward H. Egelman
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22903, USA
- Lead contact
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Tsupko P, Sagiri SS, Samateh M, Satapathy S, John G. Self-assembled Trehalose Amphiphiles as Molecular Gels: A Unique Formulation to Wax-free Cosmetics. J SURFACTANTS DETERG 2023; 26:369-385. [PMID: 37252108 PMCID: PMC10211368 DOI: 10.1002/jsde.12664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 01/10/2023] [Indexed: 02/12/2023]
Abstract
Trehalose has been used as an emollient and antioxidant in cosmetics. However, we aimed to explore trehalose amphiphiles as oil structuring agents for the preparation of gel-based lip balms as part of wax-free cosmetics. This article describes the synthesis of trehalose fatty acyl amphiphiles and their corresponding oleogel-based lip balms. Trehalose dialkanoates were synthesized by esterifying the two primary hydroxyls of trehalose with fatty acids (C4-C12) using a facile, regioselective lipase catalysis. The gelation potential of as-synthesized amphiphiles was evaluated in organic solvents and vegetable oils. Stable oleogels were subjected to X-ray diffraction (XRD), thermal (DSC), and rheological studies and further used for the preparation of lip balms. Trehalose dioctanoate (Tr8), trehalose didecanoate (Tr10) were found to be super gelators as their minimum gelation concentration is ≤ 0.2 wt%. XRD studies revealed their hexagonal columnar molecular packing while forming the fibrillar networks. Rheometry proved that the fatty acyl chain length of amphiphiles can influence the strength and flow properties of oleogels. Further rheometry (at 25 °C, 37 °C, and 50 °C) and DSC studies have validated that Tr8- and Tr10-based oleogels are stable for commercial applications. Tr8- and Tr10-based olive oil oleogels were used for the preparation of lip balms. The preliminary results suggested that the cumulative effect of trehalose's emolliency and vegetable oil gelling nature can be achieved with trehalose amphiphiles, specifically, Tr8 and Tr10. This study has also demonstrated that Tr8- and Tr10-based lip balms can be used as an alternative to beeswax and plant wax lip balms, indicating their huge potential to succeed as a new paradigm to formulate wax-free cosmetics.
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Affiliation(s)
- Polina Tsupko
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031
| | - Sai Sateesh Sagiri
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031
| | - Malick Samateh
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031
- Doctoral Program in Chemistry, The City University of New York, Graduate Center, New York, NY 10016
| | - Sitakanta Satapathy
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031
| | - George John
- Department of Chemistry and Biochemistry, The City College of New York, 160 Convent Avenue, New York, NY 10031
- Doctoral Program in Chemistry, The City University of New York, Graduate Center, New York, NY 10016
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Yilmazer S, Schwaller D, Mésini PJ. Beyond Sol-Gel: Molecular Gels with Different Transitions. Gels 2023; 9:gels9040273. [PMID: 37102885 PMCID: PMC10137434 DOI: 10.3390/gels9040273] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/13/2023] [Accepted: 03/17/2023] [Indexed: 03/29/2023] Open
Abstract
The existence of sol–gel transitions is one of the most manifest properties of molecular gels. These transitions reflect their nature since they correspond to the association or dissociation of low weight molecules through non-covalent interactions to form the network constitutive of the gel. Most described molecular gels undergo only one gel-to-sol transition upon heating, and the reverse sol-to-gel transition upon cooling. It has been long observed that different conditions of formation could lead to gels with different morphologies, and that gels can undergo a transition from gel to crystals. However, more recent publications report molecular gels which exhibit additional transitions, for instance gel-to-gel transitions. This review surveys the molecular gels for which, in addition to sol–gel transitions, transitions of different nature have been reported: gel-to-gel transitions, gel-to-crystal transition, liquid–liquid phase separations, eutectic transformations, and synereses.
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Guilbaud-Chéreau C, Dinesh B, Wagner L, Chaloin O, Ménard-Moyon C, Bianco A. Aromatic Dipeptide Homologue-Based Hydrogels for Photocontrolled Drug Release. NANOMATERIALS 2022; 12:nano12101643. [PMID: 35630862 PMCID: PMC9143549 DOI: 10.3390/nano12101643] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/29/2022] [Accepted: 05/04/2022] [Indexed: 12/16/2022]
Abstract
Peptide-based hydrogels are considered of special importance due to their biocompatibility and biodegradability. They have a wide range of applications in the biomedical field, such as drug delivery, tissue engineering, wound healing, cell culture media, and biosensing. Nevertheless, peptide-based hydrogels composed of natural α-amino acids are limited for in vivo applications because of the possible degradation by proteolytic enzymes. To circumvent this issue, the incorporation of extra methylene groups within the peptide sequence and the protection of the terminal amino group can increase the enzymatic stability. In this context, we investigated the self-assembly capacity of aromatic dipeptides (Boc-α-diphenylalanine and Boc-α-dityrosine) and their β- and γ-homologues and developed stable hydrogels. Surprisingly, only the Boc-diphenylalanine analogues were able to self-assemble and form hydrogels. A model drug, l-ascorbic acid, and oxidized carbon nanotubes (CNTs) or graphene oxide were then incorporated into the hydrogels. Under near-infrared light irradiation, the photothermal effect of the carbon nanomaterials induced the destabilization of the gel structure, which caused the release of a high amount of drug, thus providing opportunities for photocontrolled on-demand drug release.
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From tryptophan-based amides to tertiary amines: Optimization of a butyrylcholinesterase inhibitor series. Eur J Med Chem 2022; 234:114248. [DOI: 10.1016/j.ejmech.2022.114248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/20/2022] [Accepted: 02/28/2022] [Indexed: 12/29/2022]
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Panja S, Seddon A, Adams DJ. Controlling hydrogel properties by tuning non-covalent interactions in a charge complementary multicomponent system. Chem Sci 2021; 12:11197-11203. [PMID: 34522317 PMCID: PMC8386653 DOI: 10.1039/d1sc02854e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 07/22/2021] [Indexed: 12/29/2022] Open
Abstract
Mixing small molecule gelators is a promising route to prepare useful and exciting materials that cannot be accessed from any of the individual components. Here, we describe pH-triggered hydrogelation by mixing of two non-gelling amphiphiles. The intermolecular interactions among the molecules can be tuned either by controlling the degree of ionization of the components or by a preparative pathway, which enables us to control material properties such as gel strength, gel stiffness, thermal stability, and an unusual shrinking/swelling behaviour.
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Affiliation(s)
- Santanu Panja
- School of Chemistry, University of Glasgow Glasgow G12 8QQ UK
| | - Annela Seddon
- School of Physics, HH Wills Physics Laboratory, University of Bristol Tyndall Avenue Bristol BS8 1TL UK
- Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory, University of Bristol Tyndall Avenue Bristol BS8 1TL UK
| | - Dave J Adams
- School of Chemistry, University of Glasgow Glasgow G12 8QQ UK
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Li Z, Cai B, Yang W, Chen CL. Hierarchical Nanomaterials Assembled from Peptoids and Other Sequence-Defined Synthetic Polymers. Chem Rev 2021; 121:14031-14087. [PMID: 34342989 DOI: 10.1021/acs.chemrev.1c00024] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In nature, the self-assembly of sequence-specific biopolymers into hierarchical structures plays an essential role in the construction of functional biomaterials. To develop synthetic materials that can mimic and surpass the function of these natural counterparts, various sequence-defined bio- and biomimetic polymers have been developed and exploited as building blocks for hierarchical self-assembly. This review summarizes the recent advances in the molecular self-assembly of hierarchical nanomaterials based on peptoids (or poly-N-substituted glycines) and other sequence-defined synthetic polymers. Modern techniques to monitor the assembly mechanisms and characterize the physicochemical properties of these self-assembly systems are highlighted. In addition, discussions about their potential applications in biomedical sciences and renewable energy are also included. This review aims to highlight essential features of sequence-defined synthetic polymers (e.g., high stability and protein-like high-information content) and how these unique features enable the construction of robust biomimetic functional materials with high programmability and predictability, with an emphasis on peptoids and their self-assembled nanomaterials.
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Affiliation(s)
- Zhiliang Li
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.,Institute of Molecular Science and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, Shandong 266237, China
| | - Bin Cai
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.,School of Chemistry and Chemical Engineering, Shandong University, Shandong 250100, China
| | - Wenchao Yang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.,School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Chun-Long Chen
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.,Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
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Yang D, Kim BJ, He H, Xu B. Enzymatically Forming Cell Compatible Supramolecular Assemblies of Tryptophan-Rich Short Peptides. Pept Sci (Hoboken) 2021; 113:e24173. [PMID: 35445163 PMCID: PMC9017786 DOI: 10.1002/pep2.24173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 05/04/2020] [Indexed: 10/27/2023]
Abstract
Here we report a new type of tryptophan-rich short peptides, which act as hydrogelators, form supramolecular assemblies via enzymatic dephosphorylation, and exhibit cell compatibility. The facile synthesis of the peptides starts with the production of phosphotyrosine, then uses solid phase peptide synthesis (SPPS) to build the phosphopeptides that contain multiple tryptophan residues. Besides exhibiting excellent solubility, these phosphopeptides, unlike the previously reported cytotoxic phenylalanine-rich phosphopeptides, are largely compatible toward mammalian cells. Our preliminary mechanistic study suggests that the tryptophan-rich peptides, instead of forming pericellular assemblies, largely accumulate in lysosomes. Such lysosomal localization may account for their cell compatibility. Moreover, these tryptophan-rich peptides are able to transiently reduce the cytotoxicity of phenylalanine-rich peptide assemblies. This rather unexpected result implies that tryptophan may act as a useful aromatic building block for developing cell compatible supramolecular assemblies for soft materials and find applications for protecting cells from cytotoxic peptide assemblies.
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Affiliation(s)
- Dongsik Yang
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02454, USA
| | - Beom Jin Kim
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02454, USA
| | - Hongjian He
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02454, USA
| | - Bing Xu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02454, USA
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Das AK, Gavel PK. Low molecular weight self-assembling peptide-based materials for cell culture, antimicrobial, anti-inflammatory, wound healing, anticancer, drug delivery, bioimaging and 3D bioprinting applications. SOFT MATTER 2020; 16:10065-10095. [PMID: 33073836 DOI: 10.1039/d0sm01136c] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this review, we have focused on the design and development of low molecular weight self-assembling peptide-based materials for various applications including cell proliferation, tissue engineering, antibacterial, antifungal, anti-inflammatory, anticancer, wound healing, drug delivery, bioimaging and 3D bioprinting. The first part of the review describes about stimuli and various noncovalent interactions, which are the key components of various self-assembly processes for the construction of organized structures. Subsequently, the chemical functionalization of the peptides has been discussed, which is required for the designing of self-assembling peptide-based soft materials. Various low molecular weight self-assembling peptides have been discussed to explain the important structural features for the construction of defined functional nanostructures. Finally, we have discussed various examples of low molecular weight self-assembling peptide-based materials for cell culture, antimicrobial, anti-inflammatory, anticancer, wound healing, drug delivery, bioimaging and 3D bioprinting applications.
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Affiliation(s)
- Apurba K Das
- Department of Chemistry, Indian Institute of Technology Indore, Indore 453552, India.
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Thomson L, Schweins R, Draper ER, Adams DJ. Creating Transient Gradients in Supramolecular Hydrogels. Macromol Rapid Commun 2020; 41:e2000093. [PMID: 32297369 DOI: 10.1002/marc.202000093] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/26/2020] [Accepted: 03/30/2020] [Indexed: 12/25/2022]
Abstract
The self-assembly of low molecular weight gelators in water usually produces homogeneous hydrogels. However, homogeneous gels are not always desired. Using a photoacid generator, it is shown how to form gels with a transient gradient in stiffness, proved using cavitation and bulk rheology. Small-angle neutron scattering is used to show that the gels formed by photoacid are the result of the same structures as when using a conventional pH trigger. Patterned gels can also be formed, again with transient differences in stiffness.
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Affiliation(s)
- Lisa Thomson
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, Scotland
| | - Ralf Schweins
- Large Scale Structures Group, Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 GRENOBLE, Cedex 9, France
| | - Emily R Draper
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, Scotland
| | - Dave J Adams
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, Scotland
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Aldilla VR, Chen R, Martin AD, Marjo CE, Rich AM, Black DS, Thordarson P, Kumar N. Anthranilamide-based Short Peptides Self-Assembled Hydrogels as Antibacterial Agents. Sci Rep 2020; 10:770. [PMID: 31964927 PMCID: PMC6972728 DOI: 10.1038/s41598-019-57342-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/23/2019] [Indexed: 12/26/2022] Open
Abstract
In this study, we describe the synthesis and molecular properties of anthranilamide-based short peptides which were synthesised via ring opening of isatoic anhydride in excellent yields. These short peptides were incorporated as low molecular weight gelators (LMWG), bola amphiphile, and C3-symmetric molecules to form hydrogels in low concentrations (0.07-0.30% (w/v)). The critical gel concentration (CGC), viscoelastic properties, secondary structure, and fibre morphology of these short peptides were influenced by the aromaticity of the capping group or by the presence of electronegative substituent (namely fluoro) and hydrophobic substituent (such as methyl) in the short peptides. In addition, the hydrogels showed antibacterial activity against S. aureus 38 and moderate toxicity against HEK cells in vitro.
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Affiliation(s)
- Vina R Aldilla
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Renxun Chen
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Adam D Martin
- Dementia Research Centre, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW, 2109, Australia.
| | - Christopher E Marjo
- Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Anne M Rich
- Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - David StC Black
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Pall Thordarson
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia
| | - Naresh Kumar
- School of Chemistry, UNSW Sydney NSW, Sydney, 2052, Australia.
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Draper ER, Adams DJ. Controlling the Assembly and Properties of Low-Molecular-Weight Hydrogelators. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:6506-6521. [PMID: 31038973 DOI: 10.1021/acs.langmuir.9b00716] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Low-molecular-weight gels are formed by the self-assembly of small molecules into fibrous networks that can immobilize a significant amount of solvent. Here, we focus on our work with a specific class of gelator, the functionalized dipeptide. We discuss the current state of the art in the area, focusing on how these materials can be controlled. We also highlight interesting and unusual observations and unanswered questions in the field.
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Affiliation(s)
- Emily R Draper
- School of Chemistry , University of Glasgow , Glasgow G12 9AB , U.K
| | - Dave J Adams
- School of Chemistry , University of Glasgow , Glasgow G12 9AB , U.K
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