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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: 1] [Impact Index Per Article: 1.0] [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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Li Y, Han Y, Li H, Niu X, Zhang D, Wang K. Antimicrobial Hydrogels: Potential Materials for Medical Application. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304047. [PMID: 37752779 DOI: 10.1002/smll.202304047] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 08/20/2023] [Indexed: 09/28/2023]
Abstract
Microbial infections based on drug-resistant pathogenic organisms following surgery or trauma and uncontrolled bleeding are the main causes of increased mortality from trauma worldwide. The prevalence of drug-resistant pathogens has led to a significant increase in medical costs and poses a great threat to the normal life of people. This is an important issue in the field of biomedicine, and the emergence of new antimicrobial materials hydrogels holds great promise for solving this problem. Hydrogel is an important material with good biocompatibility, water absorption, oxygen permeability, adhesion, degradation, self-healing, corrosion resistance, and controlled release of drugs as well as structural diversity. Bacteria-disturbing hydrogels have important applications in the direction of surgical treatment, wound dressing, medical device coating, and tissue engineering. This paper reviews the classification of antimicrobial hydrogels, the current status of research, and the potential of antimicrobial hydrogels for one application in biomedicine, and analyzes the current research of hydrogels in biomedical applications from five aspects: metal-loaded hydrogels, drug-loaded hydrogels, carbon-material-loaded hydrogels, hydrogels with fixed antimicrobial activity and biological antimicrobial hydrogels, and provides an outlook on the high antimicrobial activity, biodegradability, biocompatibility, injectability, clinical applicability and future development prospects of hydrogels in this field.
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Affiliation(s)
- Yanni Li
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Yujia Han
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Hongxia Li
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Xiaohui Niu
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Deyi Zhang
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
| | - Kunjie Wang
- College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, 730050, P. R. China
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Rozhin P, Adorinni S, Iglesias D, Mackiol T, Kralj S, Bisetto M, Abrami M, Grassi M, Bevilacqua M, Fornasiero P, Marchesan S. Nanocomposite Hydrogels with Self-Assembling Peptide-Functionalized Carbon Nanostructures. Chemistry 2023; 29:e202301708. [PMID: 37740618 DOI: 10.1002/chem.202301708] [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: 05/29/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 09/24/2023]
Abstract
Carbon nanostructures (CNSs) are attractive components to attain nanocomposites, yet their hydrophobic nature and strong tendency to aggregate often limit their use in aqueous conditions and negatively impact their properties. In this work, carbon nanohorns (CNHs), multi-walled carbon nanotubes (CNTs), and graphene (G) are first oxidized, and then reacted to covalently anchor the self-assembling tripeptide L-Leu-D-Phe-D-Phe to improve their dispersibility in phosphate buffer, and favor the formation of hydrogels formed by the self-organizing L-Leu-D-Phe-D-Phe present in solution. The obtained nanocomposites are then characterized by transmission electron microscopy (TEM), oscillatory rheology, and conductivity measurements to gain useful insights as to the key factors that determine self-healing ability for the future design of this type of nanocomposites.
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Affiliation(s)
- Petr Rozhin
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Simone Adorinni
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Daniel Iglesias
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Tino Mackiol
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Slavko Kralj
- Department of Materials Synthesis, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Matteo Bisetto
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Unit of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Michela Abrami
- Department of Engineering and Architecture, University of Trieste, Via Valerio 6/A, 34127, Trieste, Italy
| | - Mario Grassi
- Department of Engineering and Architecture, University of Trieste, Via Valerio 6/A, 34127, Trieste, Italy
| | - Manuela Bevilacqua
- Institute for the Chemistry of Organometallic Compounds (ICCOM-CNR), National Research Council (CNR), Via Madonna del Piano 10, 50019, Sesto, Fiorentino (FI), Italy
- Third Parties Research Unit (URT-ICCOM), Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Unit of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
| | - Silvia Marchesan
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
- National Interuniversity Consortium of Materials Science and Technology (INSTM) Unit of Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
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