1
|
Zhu Y, Wei L, Zwygart ACA, Gaínza P, Khac QO, Olgiati F, Kurum A, Tang L, Correia B, Tapparel C, Stellacci F. A Synthetic Multivalent Lipopeptide Derived from Pam3CSK4 with Irreversible Influenza Inhibition and Immuno-Stimulating Effects. Small 2024:e2307709. [PMID: 38438885 DOI: 10.1002/smll.202307709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 02/23/2024] [Indexed: 03/06/2024]
Abstract
The activation of the host adaptive immune system is crucial for eliminating viruses. However, influenza infection often suppresses the innate immune response that precedes adaptive immunity, and the adaptive immune responses are typically delayed. Dendritic cells, serving as professional antigen-presenting cells, have a vital role in initiating the adaptive immune response. In this study, an immuno-stimulating antiviral system (ISAS) is introduced, which is composed of the immuno-stimulating adjuvant lipopeptide Pam3CSK4 that acts as a scaffold onto which it is covalently bound 3 to 4 influenza-inhibiting peptides. The multivalent display of peptides on the scaffold leads to a potent inhibition against H1N1 (EC50 = 20 nM). Importantly, the resulting lipopeptide, Pam3FDA, shows an irreversible inhibition mechanism. The chemical modification of peptides on the scaffold maintains Pam3CSK4's ability to stimulate dendritic cell maturation, thereby rendering Pam3FDA a unique antiviral. This is attributed to its immune activation capability, which also acts in synergy to expedite viral elimination.
Collapse
Affiliation(s)
- Yong Zhu
- Institute of Materials, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Lixia Wei
- Institute of Materials, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Arnaud Charles-Antoine Zwygart
- Department of Microbiology and Molecular Medicine, University of Geneva, CMU Rue Michel-Servet 1, Geneva 4, CH-1211, Switzerland
| | - Pablo Gaínza
- Interschool Institute of Bioengineering, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Quy Ong Khac
- Institute of Materials, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Francesca Olgiati
- Institute of Materials, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Armand Kurum
- Interschool Institute of Bioengineering, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Li Tang
- Interschool Institute of Bioengineering, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Bruno Correia
- Interschool Institute of Bioengineering, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| | - Caroline Tapparel
- Department of Microbiology and Molecular Medicine, University of Geneva, CMU Rue Michel-Servet 1, Geneva 4, CH-1211, Switzerland
| | - Francesco Stellacci
- Institute of Materials, École Polytechnique Fédérale de Lausanne Station 12, Lausanne, CH-1015, Switzerland
| |
Collapse
|
2
|
Boarino A, Wang H, Olgiati F, Artusio F, Özkan M, Bertella S, Razza N, Cagno V, Luterbacher JS, Klok HA, Stellacci F. Lignin: A Sustainable Antiviral Coating Material. ACS Sustain Chem Eng 2022; 10:14001-14010. [PMID: 36312454 PMCID: PMC9597781 DOI: 10.1021/acssuschemeng.2c04284] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 09/30/2022] [Indexed: 05/15/2023]
Abstract
Transmission of viruses through contact with contaminated surfaces is an important pathway for the spread of infections. Antiviral surface coatings are useful to minimize such risks. Current state-of-the-art approaches toward antiviral surface coatings either involve metal-based materials or complex synthetic polymers. These approaches, however, even if successful, will have to face great challenges when it comes to large-scale applications and their environmental sustainability. Here, an antiviral surface coating was prepared by spin-coating lignin, a natural biomass residue of the paper production industry. We show effective inactivation of herpes simplex virus type 2 (>99% after 30 min) on a surface coating that is low-cost and environmentally sustainable. The antiviral mechanism of the lignin surface was investigated and is attributed to reactive oxygen species generated upon oxidation of lignin phenols. This mechanism does not consume the surface coating (as opposed to the release of a specific antiviral agent) and does not require regeneration. The coating is stable in ambient conditions, as demonstrated in a 6 month aging study that did not reveal any decrease in antiviral activity. This research suggests that natural compounds may be used for the development of affordable and sustainable antiviral coatings.
Collapse
Affiliation(s)
- Alice Boarino
- Institut
des Matériaux and Institut des Sciences et Ingénierie
Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Heyun Wang
- Institute
of Materials, École Polytechnique
Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Francesca Olgiati
- Institute
of Materials, École Polytechnique
Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Fiora Artusio
- Institute
of Materials, École Polytechnique
Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Melis Özkan
- Institute
of Materials, École Polytechnique
Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Stefania Bertella
- Laboratory
of Sustainable and Catalytic Processing, Institute of Chemical Sciences
and Engineering, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Nicolò Razza
- Institute
of Materials, École Polytechnique
Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Valeria Cagno
- Institute
of Microbiology, Lausanne University Hospital,
University of Lausanne, CH-1011 Lausanne, Switzerland
| | - Jeremy S. Luterbacher
- Laboratory
of Sustainable and Catalytic Processing, Institute of Chemical Sciences
and Engineering, École Polytechnique
Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut
des Matériaux and Institut des Sciences et Ingénierie
Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Francesco Stellacci
- Institute
of Materials, École Polytechnique
Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
- Institute
of Materials, Department of Bioengineering and Global Health Institute, École Polytechnique Fédérale
de Lausanne (EPFL), Station
12, CH-1015 Lausanne, Switzerland
| |
Collapse
|
3
|
Petretto E, Ong QK, Olgiati F, Mao T, Campomanes P, Stellacci F, Vanni S. Monovalent ion-mediated charge-charge interactions drive aggregation of surface-functionalized gold nanoparticles. Nanoscale 2022; 14:15181-15192. [PMID: 36214308 PMCID: PMC9585526 DOI: 10.1039/d2nr02824g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Monolayer-protected metal nanoparticles (NPs) are not only promising materials with a wide range of potential industrial and biological applications, but they are also a powerful tool to investigate the behaviour of matter at nanoscopic scales, including the stability of dispersions and colloidal systems. This stability is dependent on a delicate balance between attractive and repulsive interactions that occur in the solution, and it is described in quantitative terms by the classic Derjaguin-Landau-Vewey-Overbeek (DLVO) theory, that posits that aggregation between NPs is driven by van der Waals interactions and opposed by electrostatic interactions. To investigate the limits of this theory at the nanoscale, where the continuum assumptions required by the DLVO theory break down, here we investigate NP dimerization by computing the Potential of Mean Force (PMF) of this process using fully atomistic MD simulations. Serendipitously, we find that electrostatic interactions can lead to the formation of metastable NP dimers at physiological ion concentrations. These dimers are stabilized by complexes formed by negatively charged ligands belonging to distinct NPs that are bridged by positively charged monovalent ions present in solution. We validate our findings by collecting tomographic EM images of NPs in solution and by quantifying their radial distribution function, that shows a marked peak at interparticle distance comparable with that of MD simulations. Taken together, our results suggest that not only van der Waals interactions, but also electrostatic interactions mediated by monovalent ions at physiological concentrations, contribute to attraction between nano-sized charged objects at very short length scales.
Collapse
Affiliation(s)
- Emanuele Petretto
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland.
| | - Quy K Ong
- Institute of Materials, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland
| | - Francesca Olgiati
- Institute of Materials, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland
| | - Ting Mao
- Institute of Materials, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland
| | - Pablo Campomanes
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland.
| | - Francesco Stellacci
- Institute of Materials, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne, Switzerland
| | - Stefano Vanni
- Department of Biology, University of Fribourg, Chemin du Musée 10, 1700 Fribourg, Switzerland.
| |
Collapse
|
4
|
Ong Q, Mao T, Iranpour Anaraki N, Richter Ł, Malinverni C, Xu X, Olgiati F, Silva PHJ, Murello A, Neels A, Demurtas D, Shimizu S, Stellacci F. Cryogenic electron tomography to determine thermodynamic quantities for nanoparticle dispersions. Mater Horiz 2022; 9:303-311. [PMID: 34739025 PMCID: PMC8725794 DOI: 10.1039/d1mh01461g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/15/2021] [Indexed: 05/24/2023]
Abstract
Here we present a method to extract thermodynamic quantities for nanoparticle dispersions in solvents. The method is based on the study of tomograms obtained from cryogenic electron tomography (cryoET). The approach is demonstrated for gold nanoparticles (diameter < 5 nm). Tomograms are reconstructed from tilt-series 2D images. Once the three-dimensional (3D) coordinates for the centres of mass of all of the particles in the sample are determined, we calculate the pair distribution function g(r) and the potential of mean force U(r) without any assumption. Importantly, we show that further quantitative information from 3D tomograms is readily available as the spatial fluctuation in the particles' position can be efficiently determined. This in turn allows for the prompt derivation of the Kirkwood-Buff integrals with all their associated quantities such as the second virial coefficient. Finally, the structure factor and the agglomeration states of the particles are evaluated directly. These thermodynamic quantities provide key insights into the dispersion properties of the particles. The method works well both for dispersed systems containing isolated particles and for systems with varying degrees of agglomerations.
Collapse
Affiliation(s)
- Quy Ong
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Ting Mao
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Neda Iranpour Anaraki
- Center for X-ray Analytics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
- Laboratory of Particles-Biology Interactions, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, Fribourg, 1700, Switzerland
| | - Łukasz Richter
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Carla Malinverni
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Xufeng Xu
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Francesca Olgiati
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | | | - Anna Murello
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
| | - Antonia Neels
- Center for X-ray Analytics, Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, St. Gallen, 9014, Switzerland
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, Fribourg, 1700, Switzerland
| | - Davide Demurtas
- Interdisciplinary Centre for Electron Microscopy (CIME), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Seishi Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Francesco Stellacci
- Institute of Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- Bioengineering Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| |
Collapse
|
5
|
Richter Ł, Paszkowska K, Cendrowska U, Olgiati F, Silva PJ, Gasbarri M, Guven ZP, Paczesny J, Stellacci F. Broad-spectrum nanoparticles against bacteriophage infections. Nanoscale 2021; 13:18684-18694. [PMID: 34738613 PMCID: PMC8601202 DOI: 10.1039/d1nr04936d] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
Viral infections caused by bacteriophages, i.e., viruses that kill bacteria are one of the most dangerous and common threats for bacteria-based bioreactors. More than 70% of biotechnology companies have admitted to encountering this problem. Despite phage infections being such a dangerous and widespread risk, there are no effective methods to avoid them to date. Herein, we present a novel technology based on nanoparticles that irreversibly deactivates bacteriophages and is safe for bacteria. Our method allows for the unsupervised protection of bacterial processes in the biotechnology industry. Gold nanoparticles coated with a mixture of negatively charged 11-mercapto 1-undecanesulfonic acid (MUS) and hydrophobic 1-octanethiol (OT) ligands are effective at deactivating various types of Escherichia coli-selective phages: T1, T4, and T7. The nanoparticles can lower the titer of phages up to 2 and 5 logs in 6 and 24 h at 50 °C, respectively. A comparative analysis of nanoparticles with different ligand shells illustrates the importance of the combination of negatively charged and hydrophobic ligands that is the key to achieving a good inhibitory concentration (EC50 ≤ 1 μg mL-1) for all tested phages. We show that the nanoparticles are harmless for the commonly used bacteria in industry Escherichia coli and are effective under conditions simulating the environment of bioreactors.
Collapse
Affiliation(s)
- Łukasz Richter
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Karolina Paszkowska
- Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Urszula Cendrowska
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Francesca Olgiati
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Paulo Jacob Silva
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Matteo Gasbarri
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Zekiye Pelin Guven
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Jan Paczesny
- Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Francesco Stellacci
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
- Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| |
Collapse
|
6
|
Lavagna E, Güven ZP, Bochicchio D, Olgiati F, Stellacci F, Rossi G. Amphiphilic nanoparticles generate curvature in lipid membranes and shape liposome-liposome interfaces. Nanoscale 2021; 13:16879-16884. [PMID: 34617538 PMCID: PMC8530203 DOI: 10.1039/d1nr05067b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/26/2021] [Indexed: 05/29/2023]
Abstract
We show by molecular dynamics that amphiphilic Au nanoparticles (NP) with a diameter of 4 nm generate curvature in phosphatidylcholine lipid membranes. NPs generate negative curvature when they adsorb on the membrane surface but, as they get spontaneously and progressively embedded into the membrane core, the curvature turns positive. As membrane embedding is kinetically slow, both configurations can be observed by Cryo-EM. NP-induced curvature explains the peculiar structure of liposome-liposome interfaces in presence of NPs.
Collapse
Affiliation(s)
- E Lavagna
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| | - Z P Güven
- Institute of Materials and Bioengineering Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - D Bochicchio
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| | - F Olgiati
- Institute of Materials and Bioengineering Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - F Stellacci
- Institute of Materials and Bioengineering Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - G Rossi
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| |
Collapse
|