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Abrao‐Nemeir I, Bentin J, Meyer N, Janot J, Torrent J, Picaud F, Balme S. Investigation of α-Synuclein and Amyloid-β(42)-E22Δ Oligomers Using SiN Nanopore Functionalized with L-Dopa. Chem Asian J 2022; 17:e202200726. [PMID: 36038502 PMCID: PMC9826174 DOI: 10.1002/asia.202200726] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/25/2022] [Indexed: 01/11/2023]
Abstract
Solid-state nanopores are an emerging technology used as a high-throughput, label-free analytical method for the characterization of protein aggregation in an aqueous solution. In this work, we used Levodopamine to coat a silicon nitride nanopore surface that was fabricated through a dielectric breakdown in order to reduce the unspecific adsorption. The coating of inner nanopore wall by investigation of the translocation of heparin. The functionalized nanopore was used to investigate the aggregation of amyloid-β and α-synuclein, two biomarkers of degenerative diseases. In the first application, we demonstrate that the α-synuclein WT is more prone to form dimers than the variant A53T. In the second one, we show for the Aβ(42)-E22Δ (Osaka mutant) that the addition of Aβ(42)-WT monomers increases the polymorphism of oligomers, while the incubation with Aβ(42)-WT fibrils generates larger aggregates.
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Affiliation(s)
- Imad Abrao‐Nemeir
- European Institute of Membranes, UMR5635University of Montpelier, ENCSM CNRSPlace Eugène Bataillon34095Montpellier cedex 5France
| | - Jeremy Bentin
- Laboratory of Nanomedicin, Imagery and Therapeutics, EA4662University hospital center of BesançonUniversity of Bourgogne-Franche-Comté (UFR Sciences et Techniques)16 route de Gray25030BesançonFrance
| | - Nathan Meyer
- European Institute of Membranes, UMR5635University of Montpelier, ENCSM CNRSPlace Eugène Bataillon34095Montpellier cedex 5France,Neurological institute of MontpellierUniversity of Montpellier, INSERM CNRSPlace Eugène Bataillon34095Montpellier cedex 5France
| | - Jean‐Marc Janot
- European Institute of Membranes, UMR5635University of Montpelier, ENCSM CNRSPlace Eugène Bataillon34095Montpellier cedex 5France
| | - Joan Torrent
- Neurological institute of MontpellierUniversity of Montpellier, INSERM CNRSPlace Eugène Bataillon34095Montpellier cedex 5France
| | - Fabien Picaud
- Laboratory of Nanomedicin, Imagery and Therapeutics, EA4662University hospital center of BesançonUniversity of Bourgogne-Franche-Comté (UFR Sciences et Techniques)16 route de Gray25030BesançonFrance
| | - Sebastien Balme
- European Institute of Membranes, UMR5635University of Montpelier, ENCSM CNRSPlace Eugène Bataillon34095Montpellier cedex 5France
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García-Castro M, Moscoso A, Sarabia F, López-Romero JM, Contreras-Cáceres R, Díaz A. Nanoscale Biocompatible Structures Generated from Fluorinated Tripodal Phenylenes on Gold Nanoprisms. Chemistry 2022; 11:e202200007. [PMID: 35324086 PMCID: PMC8944223 DOI: 10.1002/open.202200007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/09/2022] [Indexed: 11/06/2022]
Abstract
Modification of gold substrates with a stable, uniform and ultrathin layer of biocompatible materials is of tremendous interest for the development of bio-devices. We present the fabrication of hybrid systems consisting of triangular prism gold nanoparticles (Au@NTPs) covalently covered with tripod-shaped oligo(p-phenylenes) featuring trifluoromethyl groups. Their synthesis is accomplished using a biphenyl boronic ester as the key compound. Au@NTPs were prepared through a seedless procedure using 3-butenoic acid and benzyldimethyl ammonium chloride, and modified with aminothiol groups. Coverage of this amine-modified gold substrate with a self-assembled monolayer (SAM) of tripod-shaped molecules is carried out in ethanolic solution. The hybrid system avoids up to 70 % of protein corona formation, and allows unspecific attachment for bulky adsorbates, providing an optimal biosensing platform. Chemical composition and morphology are analyzed by transmission electron microscopy (TEM), UV-visible spectroscopy and field emission scanning electron microscopy (FESEM).
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Affiliation(s)
- Miguel García-Castro
- Departamento de Química Orgánica, Universidad de Málaga, Facultad de Ciencias, 29071, Málaga, Spain
| | - Ana Moscoso
- Departamento de Química Orgánica, Universidad de Málaga, Facultad de Ciencias, 29071, Málaga, Spain
| | - Francisco Sarabia
- Departamento de Química Orgánica, Universidad de Málaga, Facultad de Ciencias, 29071, Málaga, Spain
| | - Juan Manuel López-Romero
- Departamento de Química Orgánica, Universidad de Málaga, Facultad de Ciencias, 29071, Málaga, Spain
| | - Rafael Contreras-Cáceres
- Departamento de Química Orgánica, Universidad de Málaga, Facultad de Ciencias, 29071, Málaga, Spain
| | - Amelia Díaz
- Departamento de Química Orgánica, Universidad de Málaga, Facultad de Ciencias, 29071, Málaga, Spain
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Meyer N, Arroyo N, Baldelli M, Coquart N, Janot JM, Perrier V, Chinappi M, Picaud F, Torrent J, Balme S. Conical nanopores highlight the pro-aggregating effects of pyrimethanil fungicide on Aβ(1-42) peptides and dimeric splitting phenomena. CHEMOSPHERE 2022; 291:132733. [PMID: 34742766 DOI: 10.1016/j.chemosphere.2021.132733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/20/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
The Aβ(1-42) aggregation is a key event in the physiopathology of Alzheimer's disease (AD). Exogenous factors such as environmental pollutants, and more particularly pesticides, can corrupt Aβ(1-42) assembly and could influence the occurrence and pathophysiology of AD. However, pesticide involvement in the early stages of Aβ(1-42) aggregation is still unknown. Here, we employed conical track-etched nanopore in order to analyse the Aβ(1-42) fibril formation in the presence of pyrimethanil, a widely used fungicide belonging to the anilinopyrimidine class. Our results evidenced a pro-aggregating effect of pyrimethanil on Aβ(1-42). Aβ(1-42) assemblies were successfully detected using conical nanopore coated with PEG. Using an analytical model, the large current blockades observed (>0.7) were assigned to species with size close to the sensing pore. The long dwell times (hundreds ms scale) were interpreted by the possible interactions amyloid/PEG using molecular dynamic simulation. Such interaction could leave until splitting phenomena of the dimer structure. Our work also evidences that the pyrimethanil induce an aggregation of Aβ(1-42) mechanism in two steps including the reorganization prior the elongation phase.
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Affiliation(s)
- Nathan Meyer
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - Nicolas Arroyo
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon, 16 Route de Gray, 25030, Besançon, France
| | - Matteo Baldelli
- Dipartimento di Ingegneria Industriale, Università di Roma Tor Vergata, Via Del Politecnico 1, 00133, Roma, Italy
| | - Nicolas Coquart
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | - Jean Marc Janot
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France
| | | | - Mauro Chinappi
- Dipartimento di Ingegneria Industriale, Università di Roma Tor Vergata, Via Del Politecnico 1, 00133, Roma, Italy
| | - Fabien Picaud
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon, 16 Route de Gray, 25030, Besançon, France
| | - Joan Torrent
- INM, University of Montpellier, INSERM, Montpellier, France
| | - Sebastien Balme
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France.
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Xia Z, Lin CY, Drndić M. Protein-enabled detection of ibuprofen and sulfamethoxazole using solid-state nanopores. Proteomics 2022; 22:e2100071. [PMID: 34974637 DOI: 10.1002/pmic.202100071] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 02/01/2023]
Abstract
Enabled by proteins, we present an all-electrical method for rapid detection of small pharmaceuticals (ibuprofen and sulfamethoxazole [SMZ]) in aqueous media using silicon nitride pores. Specifically, we use carrier proteins, bovine serum albumin (BSA), and take advantage of their interactions with two small drug molecules to form BSA-drug complexes which can be detected by nm-diameter pores, thereby confirming the presence of small pharmaceuticals. We demonstrate detection of ibuprofen and SMZ at concentrations down to 100 nM (∼21 μg/L) and 48.5 nM (12 μg/L), respectively. We observe changes in electrical signal characteristics (reflected in event durations, rates, current magnitudes, and estimated particle diameters) of BSA-drug complexes compared to BSA-only, and differences between these two small pharmaceuticals, possibly paving a path toward developing selective sensors by identifying "electrical fingerprints" of these molecules in the future. These distinct electrical signals are likely a combined result of diffusion, electrophoretic and electroosmotic effects, interactions between the pore and particles, which depend on pore diameters, pH, and the resulting surface charges. The use of single-molecule-counting nanopores allows sensing of small pharmaceuticals, studies of protein conformational changes, and may aid in efforts to evaluate the impact of small drug molecules on aquatic and human life.
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Affiliation(s)
- Zehui Xia
- Goeppert LLC, Philadelphia, Pennsylvania, USA
| | - Chih-Yuan Lin
- Department of Physics and Astronomy, David Rittenhouse Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Marija Drndić
- Department of Physics and Astronomy, David Rittenhouse Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Meyer N, Abrao-Nemeir I, Janot JM, Torrent J, Lepoitevin M, Balme S. Solid-state and polymer nanopores for protein sensing: A review. Adv Colloid Interface Sci 2021; 298:102561. [PMID: 34768135 DOI: 10.1016/j.cis.2021.102561] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 01/15/2023]
Abstract
In two decades, the solid state and polymer nanopores became attractive method for the protein sensing with high specificity and sensitivity. They also allow the characterization of conformational changes, unfolding, assembly and aggregation as well the following of enzymatic reaction. This review aims to provide an overview of the protein sensing regarding the technique of detection: the resistive pulse and ionic diodes. For each strategy, we report the most significant achievement regarding the detection of peptides and protein as well as the conformational change, protein-protein assembly and aggregation process. We discuss the limitations and the recent strategies to improve the nanopore resolution and accuracy. A focus is done about concomitant problematic such as protein adsorption and nanopore lifetime.
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Meyer N, Arroyo N, Janot JM, Lepoitevin M, Stevenson A, Nemeir IA, Perrier V, Bougard D, Belondrade M, Cot D, Bentin J, Picaud F, Torrent J, Balme S. Detection of Amyloid-β Fibrils Using Track-Etched Nanopores: Effect of Geometry and Crowding. ACS Sens 2021; 6:3733-3743. [PMID: 34554735 DOI: 10.1021/acssensors.1c01523] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Several neurodegenerative diseases have been linked to proteins or peptides that are prone to aggregate in different brain regions. Aggregation of amyloid-β (Aβ) peptides is recognized as the main cause of Alzheimer's disease (AD) progression, leading to the formation of toxic Aβ oligomers and amyloid fibrils. The molecular mechanism of Aβ aggregation is complex and still not fully understood. Nanopore technology provides a new way to obtain kinetic and morphological aspects of Aβ aggregation at a single-molecule scale without labeling by detecting the electrochemical signal of the peptides when they pass through the hole. Here, we investigate the influence of nanoscale geometry (conical and bullet-like shape) of a track-etched nanopore pore and the effect of molecular crowding (polyethylene glycol-functionalized pores) on Aβ fibril sensing and analysis. Various Aβ fibril samples that differed by their length were produced by sonication of fibrils obtained in the presence of epigallocatechin gallate. The conical nanopore functionalized with polyethylene glycol (PEG) 5 kDa is suitable for discrimination of the fibril size from relative current blockade. The bullet-like-shaped nanopore enhances the amplitude of the current and increases the dwell time, allowing us to well discern the fibrils. Finally, the nanopore crowded with PEG 20 kDa enhances the relative current blockade and increases the dwell time; however, the discrimination is not improved compared to the "bullet-shaped" nanopore.
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Affiliation(s)
- Nathan Meyer
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
- INM UM, CNRS, INSERM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Nicolas Arroyo
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon, 16 route de Gray, 25030 Besançon, France
| | - Jean-Marc Janot
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Mathilde Lepoitevin
- Institut des Matériaux Poreux de Paris (IMAP), UMR 8004 CNRS, Ecole Normale Supérieure de Paris, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, PSL Université, 75005 Paris, France
| | - Anna Stevenson
- Institut des Matériaux Poreux de Paris (IMAP), UMR 8004 CNRS, Ecole Normale Supérieure de Paris, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, PSL Université, 75005 Paris, France
- School of Chemistry, University of St. Andrews, St. Andrews KY16 9ST, U.K
| | - Imad Abrao Nemeir
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Veronique Perrier
- INM UM, CNRS, INSERM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Daisy Bougard
- Pathogenesis and Control of Chronic and Emerging Infections, Univ Montpellier, INSERM, EFS, Univ Antilles, 34095 Montpellier, France
| | - Maxime Belondrade
- Pathogenesis and Control of Chronic and Emerging Infections, Univ Montpellier, INSERM, EFS, Univ Antilles, 34095 Montpellier, France
| | - Didier Cot
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Jérémy Bentin
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon, 16 route de Gray, 25030 Besançon, France
| | - Fabien Picaud
- Laboratoire de Nanomédecine, Imagerie et Thérapeutique, EA4662, Université Bourgogne-Franche-Comté (UFR Sciences et Techniques), Centre Hospitalier Universitaire de Besançon, 16 route de Gray, 25030 Besançon, France
| | - Joan Torrent
- INM UM, CNRS, INSERM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Sebastien Balme
- Institut Européen des Membranes, UMR5635 UM ENCSM CNRS, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
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Theerthagiri J, Lee SJ, Karuppasamy K, Park J, Yu Y, Kumari MLA, Chandrasekaran S, Kim HS, Choi MY. Fabrication strategies and surface tuning of hierarchical gold nanostructures for electrochemical detection and removal of toxic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126648. [PMID: 34329090 DOI: 10.1016/j.jhazmat.2021.126648] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/10/2021] [Accepted: 07/12/2021] [Indexed: 05/20/2023]
Abstract
The intensive research on the synthesis and characterization of gold (Au) nanostructures has been extensively documented over the last decades. These investigations allow the researchers to understand the relationships between the intrinsic properties of Au nanostructures such as particle size, shape, morphology, and composition to synthesize the Au nano/hybrid nanostructures with novel physicochemical properties. By tuning the properties above, these nanostructures are extensively employed to detect and remove trace amounts of toxic pollutants from the environment. This review attempts to document the achievements and current progress in Au-based nanostructures, general synthetic and fabrication strategies and their utilization in electrochemical sensing and environmental remediation applications. Additionally, the applications of Au nanostructures (e.g., as adsorbents, sensing platforms, catalysts, and electrodes) and advancements in the field of electrochemical sensing of different target analytes (e.g., proteins, nucleic acids, heavy metals, small molecules, and antigens) are summarized. The literature survey concludes the existing methods for the detection of toxic contaminants at various concentration levels. Finally, the existing challenges and future research directions on electrochemical sensing and degradation of toxic contaminants using Au nanostructures are defined.
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Affiliation(s)
- Jayaraman Theerthagiri
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, South Korea
| | - Seung Jun Lee
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, South Korea
| | - K Karuppasamy
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea
| | - Juhyeon Park
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, South Korea
| | - Yiseul Yu
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, South Korea
| | - M L Aruna Kumari
- Department of Chemistry, M.S. Ramaiah College of Arts, Science and Commerce, Bengaluru 560054, India
| | - Sivaraman Chandrasekaran
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Hyun-Seok Kim
- Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea
| | - Myong Yong Choi
- Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, South Korea.
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Vian R, Salehi H, Lapierre M, Cuisinier F, Cavaillès V, Balme S. Adsorption of proteins on TiO 2 particles influences their aggregation and cell penetration. Food Chem 2021; 360:130003. [PMID: 33993073 DOI: 10.1016/j.foodchem.2021.130003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 04/09/2021] [Accepted: 05/01/2021] [Indexed: 12/21/2022]
Abstract
TiO2 nanoparticles known as E171 are one controversial food additive due to its potential toxicity. In this work, the main hypothesis is that the proteins adsorbed on the TiO2 nanoparticles prevent their aggregation and favor the cell penetration. To do so, the TiO2 nanoparticles were coated with gelatin and β-lactoglobulin to reach interfacial concentrations about 0.25 mg/mg and 0.32 mg/mg, respectively. The measurement of NP size showed that the protein coating improve the colloidal stability of TiO2 nanoparticles. The FTIR analysis suggests that the β-lactoglobulin structure is modified after adsorption. The penetration of TiO2 penetration inside human intestinal epithelial cells was shown and quantify by using confocal Raman microscopy. The promoting role of the protein coating on the cell penetration was demonstrated for both the gelatin and β-lactoglobulin. Finally, the results allow establishing a correlation between the ability of proteins to prevent NP aggregation and the cell penetration.
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Affiliation(s)
- Romain Vian
- IRCM, Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université Montpellier, Montpellier F-34298, France
| | | | - Marion Lapierre
- IRCM, Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université Montpellier, Montpellier F-34298, France
| | | | - Vincent Cavaillès
- IRCM, Institut de Recherche en Cancérologie de Montpellier, INSERM U1194, Université Montpellier, Montpellier F-34298, France
| | - Sébastien Balme
- IEM, Institut Européen des Membranes, UMR 5635 Université Montpellier, CNRS, ENSCM, Place Eugene Bataillon, F-34095 Montpellier cedex 5, France.
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Cecconi F, Chinappi M. Native-state fingerprint on the ubiquitin translocation across a nanopore. Phys Rev E 2020; 101:032401. [PMID: 32290013 DOI: 10.1103/physreve.101.032401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 02/11/2020] [Indexed: 11/07/2022]
Abstract
We study the translocation of the ubiquitin molecule (Ubq) across a channel with a double section which constitutes a general feature of several transmembrane nanopores such as the α-hemolysin (αHL). Our purpose is to establish the structure-dependent character of the Ubq translocation pathway. This implies to find the correspondence, if any, between the translocational unfolding steps and the Ubq native state. For this reason, it is convenient to apply a coarse-grained computational approach, where the protein is described only by the backbone and the force field only exploits the information contained in the native state (in the spirit of Gō-like models, or native-centric models). The αHL-like pore is portrayed as two coaxial confining cylinders: a larger one for the vestibule and a narrower one for the barrel (or stem). Such simplified approach allows a large number of translocation events to be collected by limited computational resources. The co-translocational unfolding of Ubq is described via a few collective variables that characterize the translocation progress. We find two translocation intermediates (stalled conformations) that can be associated with specific unfolding stages. In particular, in the earliest step, the strand S5 unfolds and enters the pore. This step splits the native conformation into two structural clusters packing against each other in the Ubq fold. A second stall occurs when the hairpin of the N terminal engages the stem region.
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Affiliation(s)
- Fabio Cecconi
- Istituto dei Sistemi Complessi (CNR), Via Taurini 19, I-00185 Roma, Italy
| | - Mauro Chinappi
- Dipartimento di Ingegneria Industriale, Università di Roma Tor Vergata, Roma I-00133, Italy
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Plasmon-Emitter Hybrid Nanostructures of Gold Nanorod-Quantum Dots with Regulated Energy Transfer as a Universal Nano-Sensor for One-step Biomarker Detection. NANOMATERIALS 2020; 10:nano10030444. [PMID: 32121506 PMCID: PMC7152990 DOI: 10.3390/nano10030444] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 02/24/2020] [Accepted: 02/26/2020] [Indexed: 12/15/2022]
Abstract
Recently, biosensing based on weak coupling in plasmon-emitter hybrid nanostructures exhibits the merits of simplicity and high sensitivity, and attracts increasing attention as an emerging nano-sensor. In this study, we propose an innovative plasmon-regulated fluorescence resonance energy transfer (plasmon-regulated FRET) sensing strategy based on a plasmon-emitter hybrid nanostructure of gold nanorod-quantum dots (Au NR-QDs) by partially modifying QDs onto the surfaces of Au NRs. The Au NR-QDs showed good sensitivity and reversibility against refractive index change. We successfully employed the Au NR-QDs to fabricate nano-sensors for detecting a cancer biomarker of alpha fetoprotein with a limit of detection of 0.30 ng/mL, which displays that the sensitivity of the Au NR-QDs nano-sensor was effectively improved compared with the Au NRs based plasmonic sensing. Additionally, to demonstrate the universality of the plasmon-regulated FRET sensing strategy, another plasmon-emitter hybrid nano-sensor of Au nano-prism-quantum dots (Au NP-QDs) were constructed and applied for detecting a myocardial infarction biomarker of cardiac troponin I. It was first reported that the change of absorption spectra of plasmonic structure in a plasmon-emitter hybrid nanostructure was employed for analytes detection. The plasmon-regulated FRET sensing strategy described herein has potential utility to develop general sensing platforms for chemical and biological analysis.
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Sanchez-Cano C, Carril M. Recent Developments in the Design of Non-Biofouling Coatings for Nanoparticles and Surfaces. Int J Mol Sci 2020; 21:E1007. [PMID: 32028729 PMCID: PMC7037411 DOI: 10.3390/ijms21031007] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/28/2020] [Accepted: 01/31/2020] [Indexed: 01/04/2023] Open
Abstract
Biofouling is a major issue in the field of nanomedicine and consists of the spontaneous and unwanted adsorption of biomolecules on engineered surfaces. In a biological context and referring to nanoparticles (NPs) acting as nanomedicines, the adsorption of biomolecules found in blood (mostly proteins) is known as protein corona. On the one hand, the protein corona, as it covers the NPs' surface, can be considered the biological identity of engineered NPs, because the corona is what cells will "see" instead of the underlying NPs. As such, the protein corona will influence the fate, integrity, and performance of NPs in vivo. On the other hand, the physicochemical properties of the engineered NPs, such as their size, shape, charge, or hydrophobicity, will influence the identity of the proteins attracted to their surface. In this context, the design of coatings for NPs and surfaces that avoid biofouling is an active field of research. The gold standard in the field is the use of polyethylene glycol (PEG) molecules, although zwitterions have also proved to be efficient in preventing protein adhesion and fluorinated molecules are emerging as coatings with interesting properties. Hence, in this review, we will focus on recent examples of anti-biofouling coatings in three main areas, that is, PEGylated, zwitterionic, and fluorinated coatings.
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Affiliation(s)
- Carlos Sanchez-Cano
- Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramon 182, 20014 Donostia San Sebastián, Spain;
| | - Mónica Carril
- Instituto Biofisika UPV/EHU, CSIC, Barrio Sarriena s/n, Leioa, E-48940 Bizkaia, Spain
- Departamento de Bioquímica y Biología Molecular, UPV/EHU, Barrio Sarriena s/n, Leioa, E-48940 Bizkaia, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
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Au and Au-Based nanomaterials: Synthesis and recent progress in electrochemical sensor applications. Talanta 2020; 206:120210. [DOI: 10.1016/j.talanta.2019.120210] [Citation(s) in RCA: 124] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 07/25/2019] [Accepted: 07/31/2019] [Indexed: 12/28/2022]
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Gubbiotti A, Chinappi M, Casciola CM. Confinement effects on the dynamics of a rigid particle in a nanochannel. Phys Rev E 2019; 100:053307. [PMID: 31869915 DOI: 10.1103/physreve.100.053307] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Indexed: 12/19/2022]
Abstract
The transport of nanoparticles in confined geometries plays a crucial role in several technological applications ranging from nanopore sensors to filtration membranes. Here we describe a Brownian approach to simulate the motion of a rigid-body nanoparticle of an arbitrary shape under confinement. A quaternion formulation is used for the nanoparticle orientation, and the corresponding overdamped Langevin equation, completed by the proper fluctuation-dissipation relation, is derived. The hydrodynamic mobility matrix is obtained via dissipative particle dynamics simulation equipped with a new method for enforcing the no-slip boundary condition for curved moving solid-liquid interfaces. As an application, we analyzed the motion of a nanoparticle in a cylindrical channel under the action of external fields. We show that both axial effective diffusion and rotational diffusion decrease with confinement.
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Affiliation(s)
- Alberto Gubbiotti
- Dipartimento di Ingegneria Meccanica e Aerospaziale, Sapienza Università di Roma, 00184 Roma, Italia
| | - Mauro Chinappi
- Dipartimento di Ingegneria Industriale, Università di Roma Tor Vergata, 00133 Roma, Italia
| | - Carlo Massimo Casciola
- Dipartimento di Ingegneria Meccanica e Aerospaziale, Sapienza Università di Roma, 00184 Roma, Italia
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Coglitore D, Coulon PE, Janot JM, Balme S. Revealing the Nanoparticle-Protein Corona with a Solid-State Nanopore. MATERIALS 2019; 12:ma12213524. [PMID: 31661780 PMCID: PMC6862098 DOI: 10.3390/ma12213524] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/07/2019] [Accepted: 10/24/2019] [Indexed: 12/14/2022]
Abstract
Protein adsorption at the liquid–solid interface is an old but not totally solved topic. One challenge is to find an easy way to characterize the protein behavior on nanoparticles and make a correlation with its intrinsic properties. This work aims to investigate protein adsorption on gold nanoparticles and the colloidal properties. The protein panel was chosen from different structural categories (mainly-α, mainly-β or mix-αβ). The result shows that the colloidal stability with salt addition does not depend on the structural category. Conversely, using the single nanopore technique, we show that the mainly-α proteins form a smaller corona than the mainly-β proteins. We assign these observations to the lower internal energy of α-helices, making them more prone to form a homogeneous corona layer.
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Affiliation(s)
- Diego Coglitore
- Institut Européen des Membranes, UMR5635, Université de Montpellier CNRS ENSCM, Place Eugène Bataillon, 34090 Montpellier, France.
| | - Pierre Eugene Coulon
- Laboratoire des Solides Irradiés, École polytechnique, Université Paris-Saclay, Route de Saclay, 91128 Palaiseau CEDEX, France.
| | - Jean-Marc Janot
- Institut Européen des Membranes, UMR5635, Université de Montpellier CNRS ENSCM, Place Eugène Bataillon, 34090 Montpellier, France.
| | - Sébastien Balme
- Institut Européen des Membranes, UMR5635, Université de Montpellier CNRS ENSCM, Place Eugène Bataillon, 34090 Montpellier, France.
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Coglitore D, Janot JM, Balme S. Protein at liquid solid interfaces: Toward a new paradigm to change the approach to design hybrid protein/solid-state materials. Adv Colloid Interface Sci 2019; 270:278-292. [PMID: 31306853 DOI: 10.1016/j.cis.2019.07.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 10/26/2022]
Abstract
This review gives an overview of protein adsorption at solid/liquid interface. Compared to the other ones, we have focus on three main questions with the point of view of the protein. The first question is related to the kinetic and especially the using of Langmuir model to describe the protein adsorption. The second question is about the concept of hard and soft protein. In this part, we report the protein structural modification induced by adsorption regarding their intrinsic structure. This allows formulating of a new concept to classify the protein to predict their behavior at solid/liquid interface. The last question is related to the protein corona. We give an overview about the soft/hard corona and attempt to make correlation with the concept of hard/soft protein.
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