1
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Guo W, Lu T, Crisci R, Nagao S, Wei T, Chen Z. Determination of protein conformation and orientation at buried solid/liquid interfaces. Chem Sci 2023; 14:2999-3009. [PMID: 36937592 PMCID: PMC10016606 DOI: 10.1039/d2sc06958j] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
Protein structures at solid/liquid interfaces mediate interfacial protein functions, which are important for many applications. It is difficult to probe interfacial protein structures at buried solid/liquid interfaces in situ at the molecular level. Here, a systematic methodology to determine protein molecular structures (orientation and conformation) at buried solid/liquid interfaces in situ was successfully developed with a combined approach using a nonlinear optical spectroscopic technique - sum frequency generation (SFG) vibrational spectroscopy, isotope labeling, spectra calculation, and computer simulation. With this approach, molecular structures of protein GB1 and its mutant (with two amino acids mutated) were investigated at the polymer/solution interface. Markedly different orientations and similar (but not identical) conformations of the wild-type protein GB1 and its mutant at the interface were detected, due to the varied molecular interfacial interactions. This systematic strategy is general and can be widely used to elucidate protein structures at buried interfaces in situ.
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Affiliation(s)
- Wen Guo
- Department of Chemistry, University of Michigan 930 North University Avenue Ann Arbor 48109 Michigan USA
| | - Tieyi Lu
- Department of Chemistry, University of Michigan 930 North University Avenue Ann Arbor 48109 Michigan USA
| | - Ralph Crisci
- Department of Chemistry, University of Michigan 930 North University Avenue Ann Arbor 48109 Michigan USA
| | - Satoshi Nagao
- Graduate School of Science, University of Hyogo 3-2-1 Koto, Ako-gun Kamigouri-cho Hyogo 678-1297 Japan
| | - Tao Wei
- Department of Chemical Engineering, Howard University 2366 Sixth Street NW Washington 20059 DC USA
| | - Zhan Chen
- Department of Chemistry, University of Michigan 930 North University Avenue Ann Arbor 48109 Michigan USA
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2
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Toro-Mendoza J, Maio L, Gallego M, Otto F, Schulz F, Parak WJ, Sanchez-Cano C, Coluzza I. Bioinspired Polyethylene Glycol Coatings for Reduced Nanoparticle-Protein Interactions. ACS NANO 2023; 17:955-965. [PMID: 36602983 DOI: 10.1021/acsnano.2c05682] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Nanoparticles (NPs) and other engineered nanomaterials have great potential as nanodrugs or nanomedical devices for biomedical applications. However, the adsorption of proteins in blood circulation or similar physiological fluids can significantly alter the surface properties and therapeutic response induced by most nanomaterials. For example, interaction with proteins can change the bloodstream circulation time and availability of therapeutic NPs or hinder the accumulation in their desired target organs. Proteins can also trigger or prevent agglomeration. By combining experimental and computational approaches, we have developed NPs carrying polyethylene glycol (PEG) polymeric coatings that mimic the surface charge distribution of proteins typically found in blood, which are known to show low aggregation under normal blood conditions. Here, we show that NPs with coatings based on apoferritin or human serum albumin display better antifouling properties and weaker protein interaction compared to similar NPs carrying conventional PEG polymeric coatings.
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Affiliation(s)
- Jhoan Toro-Mendoza
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
| | - Lucia Maio
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
| | - Marta Gallego
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Paseo de Miramón 182, 20014Donostia-San Sebastián, Spain
| | - Ferdinand Otto
- Universität Hamburg, Luruper Chaussee 149, 22607Hamburg, Germany
| | - Florian Schulz
- Universität Hamburg, Luruper Chaussee 149, 22607Hamburg, Germany
| | - Wolfgang J Parak
- Universität Hamburg, Luruper Chaussee 149, 22607Hamburg, Germany
| | - Carlos Sanchez-Cano
- Ikerbasque, Basque Foundation for Science, Plaza de Euskadi 5, Bilbao48009, Spain
- Donostia International Physics Center (DIPC)Paseo Manuel de Lardizabal, 4, 20018Donostia/San Sebastian, Gipuzkoa, Spain
| | - Ivan Coluzza
- Ikerbasque, Basque Foundation for Science, Plaza de Euskadi 5, Bilbao48009, Spain
- BCMaterials, Bld. Martina Casiano, Third Floor, UPV/EHU Science Park, Barrio Sarriena s/n, 48940Leioa, Spain
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3
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Automated Protein Secondary Structure Assignment from C α Positions Using Neural Networks. Biomolecules 2022; 12:biom12060841. [PMID: 35740966 PMCID: PMC9220970 DOI: 10.3390/biom12060841] [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: 05/25/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 11/17/2022] Open
Abstract
The assignment of secondary structure elements in protein conformations is necessary to interpret a protein model that has been established by computational methods. The process essentially involves labeling the amino acid residues with H (Helix), E (Strand), or C (Coil, also known as Loop). When particular atoms are absent from an input protein structure, the procedure becomes more complicated, especially when only the alpha carbon locations are known. Various techniques have been tested and applied to this problem during the last forty years. The application of machine learning techniques is the most recent trend. This contribution presents the HECA classifier, which uses neural networks to assign protein secondary structure types. The technique exclusively employs Cα coordinates. The Keras (TensorFlow) library was used to implement and train the neural network model. The BioShell toolkit was used to calculate the neural network input features from raw coordinates. The study’s findings show that neural network-based methods may be successfully used to take on structure assignment challenges when only Cα trace is available. Thanks to the careful selection of input features, our approach’s accuracy (above 97%) exceeded that of the existing methods.
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4
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Watchorn J, Clasky AJ, Prakash G, Johnston IAE, Chen PZ, Gu FX. Untangling Mucosal Drug Delivery: Engineering, Designing, and Testing Nanoparticles to Overcome the Mucus Barrier. ACS Biomater Sci Eng 2022; 8:1396-1426. [PMID: 35294187 DOI: 10.1021/acsbiomaterials.2c00047] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Mucus is a complex viscoelastic gel and acts as a barrier covering much of the soft tissue in the human body. High vascularization and accessibility have motivated drug delivery to various mucosal surfaces; however, these benefits are hindered by the mucus layer. To overcome the mucus barrier, many nanomedicines have been developed, with the goal of improving the efficacy and bioavailability of drug payloads. Two major nanoparticle-based strategies have emerged to facilitate mucosal drug delivery, namely, mucoadhesion and mucopenetration. Generally, mucoadhesive nanoparticles promote interactions with mucus for immobilization and sustained drug release, whereas mucopenetrating nanoparticles diffuse through the mucus and enhance drug uptake. The choice of strategy depends on many factors pertaining to the structural and compositional characteristics of the target mucus and mucosa. While there have been promising results in preclinical studies, mucus-nanoparticle interactions remain poorly understood, thus limiting effective clinical translation. This article reviews nanomedicines designed with mucoadhesive or mucopenetrating properties for mucosal delivery, explores the influence of site-dependent physiological variation among mucosal surfaces on efficacy, transport, and bioavailability, and discusses the techniques and models used to investigate mucus-nanoparticle interactions. The effects of non-homeostatic perturbations on protein corona formation, mucus composition, and nanoparticle performance are discussed in the context of mucosal delivery. The complexity of the mucosal barrier necessitates consideration of the interplay between nanoparticle design, tissue-specific differences in mucus structure and composition, and homeostatic or disease-related changes to the mucus barrier to develop effective nanomedicines for mucosal delivery.
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Affiliation(s)
- Jeffrey Watchorn
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Aaron J Clasky
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Gayatri Prakash
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Ian A E Johnston
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Paul Z Chen
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada
| | - Frank X Gu
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, Ontario M5S 3E5, Canada.,Institute of Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada
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5
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Lee H. Molecular Modeling of Protein Corona Formation and Its Interactions with Nanoparticles and Cell Membranes for Nanomedicine Applications. Pharmaceutics 2021; 13:637. [PMID: 33947090 PMCID: PMC8145147 DOI: 10.3390/pharmaceutics13050637] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 12/30/2022] Open
Abstract
The conformations and surface properties of nanoparticles have been modified to improve the efficiency of drug delivery. However, when nanoparticles flow through the bloodstream, they interact with various plasma proteins, leading to the formation of protein layers on the nanoparticle surface, called protein corona. Experiments have shown that protein corona modulates nanoparticle size, shape, and surface properties and, thus, influence the aggregation of nanoparticles and their interactions with cell membranes, which can increases or decreases the delivery efficiency. To complement these experimental findings and understand atomic-level phenomena that cannot be captured by experiments, molecular dynamics (MD) simulations have been performed for the past decade. Here, we aim to review the critical role of MD simulations to understand (1) the conformation, binding site, and strength of plasma proteins that are adsorbed onto nanoparticle surfaces, (2) the competitive adsorption and desorption of plasma proteins on nanoparticle surfaces, and (3) the interactions between protein-coated nanoparticles and cell membranes. MD simulations have successfully predicted the competitive binding and conformation of protein corona and its effect on the nanoparticle-nanoparticle and nanoparticle-membrane interactions. In particular, simulations have uncovered the mechanism regarding the competitive adsorption and desorption of plasma proteins, which helps to explain the Vroman effect. Overall, these findings indicate that simulations can now provide predications in excellent agreement with experimental observations as well as atomic-scale insights into protein corona formation and interactions.
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Affiliation(s)
- Hwankyu Lee
- Department of Chemical Engineering, Dankook University, Yongin-si 16890, Korea
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6
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Smith AK, Soltani M, Wilkerson JW, Timmerman BD, Zhao EL, Bundy BC, Knotts TA. Coarse-grained simulation of PEGylated and tethered protein devices at all experimentally accessible surface residues on β-lactamase for stability analysis and comparison. J Chem Phys 2021; 154:075102. [PMID: 33607875 DOI: 10.1063/5.0032019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
PEGylated and surface-tethered proteins are used in a variety of biotechnological applications, but traditional methods offer little control over the placement of the functionalization sites on the protein. Fortunately, recent experimental methods functionalize the protein at any location on the amino acid sequence, so the question becomes one of selecting the site that will result in the best protein function. This work shows how molecular simulation can be used to screen potential attachment sites for surface tethering or PEGylation. Previous simulation work has shown promise in this regard for a model protein, but these studies are limited to screening only a few of the surface-accessible sites or only considered surface tethering or PEGylation separately rather than their combined effects. This work is done to overcome these limitations by screening all surface-accessible functionalization sites on a protein of industrial and therapeutic importance (TEM-1) and to evaluate the effects of tethering and PEGylation simultaneously in an effort to create a more accurate screen. The results show that functionalization site effectiveness appears to be a function of super-secondary and tertiary structures rather than the primary structure, as is often currently assumed. Moreover, sites in the middle of secondary structure elements, and not only those in loops regions, are shown to be good options for functionalization-a fact not appreciated in current practice. Taken as a whole, the results show how rigorous molecular simulation can be done to identify candidate amino acids for functionalization on a protein to facilitate the rational design of protein devices.
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Affiliation(s)
- Addison K Smith
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
| | - Mehran Soltani
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
| | - Joshua W Wilkerson
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
| | - Brandon D Timmerman
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
| | - Emily Long Zhao
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
| | - Bradley C Bundy
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
| | - Thomas A Knotts
- Department of Chemical Engineering at Brigham Young University, Provo, Utah 84602, USA
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7
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March D, Bianco V, Franzese G. Protein Unfolding and Aggregation near a Hydrophobic Interface. Polymers (Basel) 2021; 13:polym13010156. [PMID: 33401542 PMCID: PMC7795562 DOI: 10.3390/polym13010156] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 12/22/2020] [Accepted: 12/24/2020] [Indexed: 01/29/2023] Open
Abstract
The behavior of proteins near interfaces is relevant for biological and medical purposes. Previous results in bulk show that, when the protein concentration increases, the proteins unfold and, at higher concentrations, aggregate. Here, we study how the presence of a hydrophobic surface affects this course of events. To this goal, we use a coarse-grained model of proteins and study by simulations their folding and aggregation near an ideal hydrophobic surface in an aqueous environment by changing parameters such as temperature and hydrophobic strength, related, e.g., to ions concentration. We show that the hydrophobic surface, as well as the other parameters, affect both the protein unfolding and aggregation. We discuss the interpretation of these results and define future lines for further analysis, with their possible implications in neurodegenerative diseases.
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Affiliation(s)
- David March
- Secció de Física Estadística i Interdisciplinària—Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
| | - Valentino Bianco
- Chemical Physics Department, Faculty of Chemistry, Universidad Complutense de Madrid, Plaza de las Ciencias, Ciudad Universitaria, 28040 Madrid, Spain
- Correspondence: (V.B.); (G.F.)
| | - Giancarlo Franzese
- Secció de Física Estadística i Interdisciplinària—Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
- Correspondence: (V.B.); (G.F.)
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8
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Wilkerson JW, Smith AK, Wilding KM, Bundy BC, Knotts TA. The Effects of p-Azidophenylalanine Incorporation on Protein Structure and Stability. J Chem Inf Model 2020; 60:5117-5125. [PMID: 32966074 DOI: 10.1021/acs.jcim.0c00725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Functionalization is often needed to harness the power of proteins for beneficial use but can cause losses to stability and/or activity. State of the art methods to limit these deleterious effects accomplish this by substituting an amino acid in the wild-type molecule into an unnatural amino acid, such as p-azidophenylalanine (pAz), but selecting the residue for substitution a priori remains an elusive goal of protein engineering. The results of this work indicate that all-atom molecular dynamics simulation can be used to determine whether substituting pAz for a natural amino acid will be detrimental to experimentally determined protein stability. These results offer significant hope that local deviations from wild-type structure caused by pAz incorporation observed in simulations can be a predictive metric used to reduce the number of costly experiments that must be done to find active proteins upon substitution with pAz and subsequent functionalization.
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Affiliation(s)
- Joshua W Wilkerson
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Addison K Smith
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Kristen M Wilding
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Bradley C Bundy
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
| | - Thomas A Knotts
- Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, United States
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9
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Zhang X, Li M, Lv Y, Sun X, Han Y, Liu B, Zhao X, Huang X. Probing gold nanoparticles for the desensitization to β-lactoglobulin from binding mechanism, structure and IgE binding changes. Food Chem 2020; 342:128329. [PMID: 33060003 DOI: 10.1016/j.foodchem.2020.128329] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 09/17/2020] [Accepted: 10/05/2020] [Indexed: 11/15/2022]
Abstract
Because of the adsorption of proteins, gold nanoparticles (AuNPs) create potential biological risks in biomedicine, leading to the formation of the protein corona. This adsorption is mainly due to the formation of gold-sulfur (AuS) covalent bonds between the AuNPs and the -SH groups, causing bioactivity denaturation and biological problems; however, it could also lead to some biological benefits. We explored AuNPs as a potential material for desensitization to allergens, such as β-lactoglobulin (βLG). To address the desensitization of AuNPs, we investigated the binding mechanism and the specific relationship of the time evolution of AuS bond, secondary structure, and allergy changes. The formation of AuS bond takes approximately 9 h, consistent with the complete changes time in secondary structure and immunoglobulin E (IgE) combining capacity of the βLG, decreasing allergic reactions. These results indicate that AuNPs have the potential to minimize allergic reactions in the future.
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Affiliation(s)
- Xiaoning Zhang
- School of Food Science & Engineering, Qilu University of Technology, 250353 Jinan, China.
| | - Meifeng Li
- School of Public Health, Chengdu University of Traditional Chinese Medicine, 610075 Chengdu, China
| | - Yuanping Lv
- College of Biomass Sciences and Engineering, Sichuan University, 610065 Chengdu, China
| | - Xiaoling Sun
- School of Food Science & Engineering, Qilu University of Technology, 250353 Jinan, China
| | - Yao Han
- School of Food Science & Engineering, Qilu University of Technology, 250353 Jinan, China
| | - Bing Liu
- Resources and Environment Innovation Research Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China
| | - Xiangzhong Zhao
- School of Food Science & Engineering, Qilu University of Technology, 250353 Jinan, China.
| | - Xiaowen Huang
- State Key Laboratory of Biobased Materials and Green Papermaking, School of Bioengineering, Qilu University of Technology, 250353 Jinan, China.
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10
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Poulsen KM, Pho T, Champion JA, Payne CK. Automation and low-cost proteomics for characterization of the protein corona: experimental methods for big data. Anal Bioanal Chem 2020; 412:6543-6551. [PMID: 32500258 PMCID: PMC7483600 DOI: 10.1007/s00216-020-02726-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 05/13/2020] [Accepted: 05/19/2020] [Indexed: 01/09/2023]
Abstract
Nanoparticles used in biological settings are exposed to proteins that adsorb on the surface forming a protein corona. These adsorbed proteins dictate the subsequent cellular response. A major challenge has been predicting what proteins will adsorb on a given nanoparticle surface. Instead, each new nanoparticle and nanoparticle modification must be tested experimentally to determine what proteins adsorb on the surface. We propose that any future predictive ability will depend on large datasets of protein-nanoparticle interactions. As a first step towards this goal, we have developed an automated workflow using a liquid handling robot to form and isolate protein coronas. As this workflow depends on magnetic separation steps, we test the ability to embed magnetic nanoparticles within a protein nanoparticle. These experiments demonstrate that magnetic separation could be used for any type of nanoparticle in which a magnetic core can be embedded. Higher-throughput corona characterization will also require lower-cost approaches to proteomics. We report a comparison of fast, low-cost, and standard, slower, higher-cost liquid chromatography coupled with mass spectrometry to identify the protein corona. These methods will provide a step forward in the acquisition of the large datasets necessary to predict nanoparticle-protein interactions.
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Affiliation(s)
- Karsten M Poulsen
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Thomas Pho
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Julie A Champion
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
| | - Christine K Payne
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.
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11
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Meesaragandla B, García I, Biedenweg D, Toro-Mendoza J, Coluzza I, Liz-Marzán LM, Delcea M. H-Bonding-mediated binding and charge reorganization of proteins on gold nanoparticles. Phys Chem Chem Phys 2020; 22:4490-4500. [DOI: 10.1039/c9cp06371d] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Gold nanoparticles with various functionalities interact with the human serum albumin (HSA) leading to protein structural changes. HSA-nanoparticles bioconjugates display lower toxicity and slower cell uptake rates, compared to nanoparticles in the absence of protein.
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Affiliation(s)
- Brahmaiah Meesaragandla
- Institute of Biochemistry
- University of Greifswald
- 17489 Greifswald
- Germany
- ZIK HIKE – Center for Innovation Competence “Humoral Immune Reactions in Cardiovascular Diseases”
| | - Isabel García
- CIC biomaGUNE and CIBER de Bioingeniería
- Biomateriales y Nanomedicina (CIBER-BBN)
- 20014 Donostia-San Sebastián
- Spain
| | - Doreen Biedenweg
- ZIK HIKE – Center for Innovation Competence “Humoral Immune Reactions in Cardiovascular Diseases”
- University of Greifswald
- 17489 Greifswald
- Germany
| | - Jhoan Toro-Mendoza
- CIC biomaGUNE and CIBER de Bioingeniería
- Biomateriales y Nanomedicina (CIBER-BBN)
- 20014 Donostia-San Sebastián
- Spain
| | - Ivan Coluzza
- CIC biomaGUNE and CIBER de Bioingeniería
- Biomateriales y Nanomedicina (CIBER-BBN)
- 20014 Donostia-San Sebastián
- Spain
- Ikerbasque
| | - Luis M. Liz-Marzán
- CIC biomaGUNE and CIBER de Bioingeniería
- Biomateriales y Nanomedicina (CIBER-BBN)
- 20014 Donostia-San Sebastián
- Spain
- Ikerbasque
| | - Mihaela Delcea
- Institute of Biochemistry
- University of Greifswald
- 17489 Greifswald
- Germany
- ZIK HIKE – Center for Innovation Competence “Humoral Immune Reactions in Cardiovascular Diseases”
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12
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Wei S, Zou X, Tian J, Huang H, Guo W, Chen Z. Control of Protein Conformation and Orientation on Graphene. J Am Chem Soc 2019; 141:20335-20343. [PMID: 31774666 DOI: 10.1021/jacs.9b10705] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Graphene-based biosensors have attracted considerable attention due to their advantages of label-free detection and high sensitivity. Many such biosensors utilize noncovalent van der Waals force to attach proteins onto graphene surface while preserving graphene's high conductivity. Maintaining the protein structure without denaturation/substantial conformational change and controlling proper protein orientation on the graphene surface are critical for biosensing applications of these biosensors fabricated with proteins on graphene. Based on the knowledge we obtained from our previous experimental study and computer modeling of amino acid residual level interactions between graphene and peptides, here we systemically redesigned an important protein for better conformational stability and desirable orientation on graphene. In this paper, immunoglobulin G (IgG) antibody-binding domain of protein G (protein GB1) was studied to demonstrate how we can preserve the protein native structure and control the protein orientation on graphene surface by redesigning protein mutants. Various experimental tools including sum frequency generation vibrational spectroscopy, attenuated total refection-Fourier transform infrared spectroscopy, fluorescence spectroscopy, and circular dichroism spectroscopy were used to study the protein GB1 structure on graphene, supplemented by molecular dynamics simulations. By carefully designing the protein GB1 mutant, we can avoid strong unfavorable interactions between protein and graphene to preserve protein conformation and to enable the protein to adopt a preferred orientation. The methodology developed in this study is general and can be applied to study different proteins on graphene and beyond. With the knowledge obtained from this research, one could apply this method to optimize protein function on surfaces (e.g., to enhance biosensor sensitivity).
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Affiliation(s)
- Shuai Wei
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Xingquan Zou
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Jiayi Tian
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Hao Huang
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Wen Guo
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
| | - Zhan Chen
- Department of Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States
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13
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Casalini T, Limongelli V, Schmutz M, Som C, Jordan O, Wick P, Borchard G, Perale G. Molecular Modeling for Nanomaterial-Biology Interactions: Opportunities, Challenges, and Perspectives. Front Bioeng Biotechnol 2019; 7:268. [PMID: 31681746 PMCID: PMC6811494 DOI: 10.3389/fbioe.2019.00268] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/27/2019] [Indexed: 12/17/2022] Open
Abstract
Injection of nanoparticles (NP) into the bloodstream leads to the formation of a so-called "nano-bio" interface where dynamic interactions between nanoparticle surfaces and blood components take place. A common consequence is the formation of the protein corona, that is, a network of adsorbed proteins that can strongly alter the surface properties of the nanoparticle. The protein corona and the resulting structural changes experienced by adsorbed proteins can lead to substantial deviations from the expected cellular uptake as well as biological responses such as NP aggregation and NP-induced protein fibrillation, NP interference with enzymatic activity, or the exposure of new antigenic epitopes. Achieving a detailed understanding of the nano-bio interface is still challenging due to the synergistic effects of several influencing factors like pH, ionic strength, and hydrophobic effects, to name just a few. Because of the multiscale complexity of the system, modeling approaches at a molecular level represent the ideal choice for a detailed understanding of the driving forces and, in particular, the early events at the nano-bio interface. This review aims at exploring and discussing the opportunities and perspectives offered by molecular modeling in this field through selected examples from literature.
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Affiliation(s)
- Tommaso Casalini
- Polymer Engineering Laboratory, Department of Innovative Technologies, Institute for Mechanical Engineering and Materials Technology, University of Applied Sciences and Arts of Southern Switzerland (SUPSI), Manno, Switzerland
| | - Vittorio Limongelli
- Faculty of Biomedical Sciences, Center for Computational Medicine in Cardiology, Institute of Computational Science, Università della Svizzera italiana (USI), Lugano, Switzerland
- Department of Pharmacy, University of Naples “Federico II”, Naples, Italy
| | - Mélanie Schmutz
- Technology and Society Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), St. Gallen, Switzerland
| | - Claudia Som
- Technology and Society Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), St. Gallen, Switzerland
| | - Olivier Jordan
- School of Pharmaceutical Sciences, University of Geneva, Genève, Switzerland
| | - Peter Wick
- Laboratory for Particles – Biology Interactions, Swiss Federal Laboratories for Materials Science and Technology (Empa), St. Gallen, Switzerland
| | - Gerrit Borchard
- School of Pharmaceutical Sciences, University of Geneva, Genève, Switzerland
| | - Giuseppe Perale
- Polymer Engineering Laboratory, Department of Innovative Technologies, Institute for Mechanical Engineering and Materials Technology, University of Applied Sciences and Arts of Southern Switzerland (SUPSI), Manno, Switzerland
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Wien, Austria
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14
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Affiliation(s)
- Christine K. Payne
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
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15
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Shamsi M, Mohammadi A, Manshadi MK, Sanati-Nezhad A. Mathematical and computational modeling of nano-engineered drug delivery systems. J Control Release 2019; 307:150-165. [DOI: 10.1016/j.jconrel.2019.06.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/10/2019] [Accepted: 06/12/2019] [Indexed: 12/20/2022]
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16
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Tavanti F, Pedone A, Menziani MC. Multiscale Molecular Dynamics Simulation of Multiple Protein Adsorption on Gold Nanoparticles. Int J Mol Sci 2019; 20:ijms20143539. [PMID: 31331044 PMCID: PMC6678212 DOI: 10.3390/ijms20143539] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 07/11/2019] [Accepted: 07/17/2019] [Indexed: 01/06/2023] Open
Abstract
A multiscale molecular dynamics simulation study has been carried out in order to provide in-depth information on the adsorption of hemoglobin, myoglobin, and trypsin over citrate-capped AuNPs of 15 nm diameter. In particular, determinants for single proteins adsorption and simultaneous adsorption of the three types of proteins considered have been studied by Coarse-Grained and Meso-Scale molecular simulations, respectively. The results, discussed in the light of the controversial experimental data reported in the current experimental literature, have provided a detailed description of the (i) recognition process, (ii) number of proteins involved in the early stages of corona formation, (iii) protein competition for AuNP adsorption, (iv) interaction modalities between AuNP and protein binding sites, and (v) protein structural preservation and alteration.
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Affiliation(s)
- Francesco Tavanti
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Alfonso Pedone
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy
| | - Maria Cristina Menziani
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Campi 103, 41125, Modena, Italy.
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17
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Tollefson EJ, Allen CR, Chong G, Zhang X, Rozanov ND, Bautista A, Cerda JJ, Pedersen JA, Murphy CJ, Carlson EE, Hernandez R. Preferential Binding of Cytochrome c to Anionic Ligand-Coated Gold Nanoparticles: A Complementary Computational and Experimental Approach. ACS NANO 2019; 13:6856-6866. [PMID: 31082259 DOI: 10.1021/acsnano.9b01622] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Membrane-bound proteins can play a role in the binding of anionic gold nanoparticles (AuNPs) to model bilayers; however, the mechanism for this binding remains unresolved. In this work, we determine the relative orientation of the peripheral membrane protein cytochrome c in binding to a mercaptopropionic acid-functionalized AuNP (MPA-AuNP). As this is nonrigid binding, traditional methods involving crystallographic or rigid molecular docking techniques are ineffective at resolving the question. Instead, we have implemented a computational assay technique using a cross-correlation of a small ensemble of 200 ns long molecular dynamics trajectories to identify a preferred nonrigid binding orientation or pose of cytochrome c on MPA-AuNPs. We have also employed a mass spectrometry-based footprinting method that enables the characterization of the stable protein corona that forms at long time-scales in solution but remains in a dynamic state. Through the combination of these computational and experimental primary results, we have established a consensus result establishing the identity of the exposed regions of cytochrome c in proximity to MPA-AuNPs and its complementary pose(s) with amino-acid specificity. Moreover, the tandem use of the two methods can be applied broadly to determine the accessibility of membrane-binding sites for peripheral membrane proteins upon adsorption to AuNPs or to determine the exposed amino-acid residues of the hard corona that drive the acquisition of dynamic soft coronas. We anticipate that the combined use of simulation and experimental methods to characterize biomolecule-nanoparticle interactions, as demonstrated here, will become increasingly necessary as the complexity of such target systems grows.
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Affiliation(s)
- Emily J Tollefson
- Department of Chemistry , University of Minnesota-Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Caley R Allen
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Gene Chong
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Xi Zhang
- Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Nikita D Rozanov
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Anthony Bautista
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Jennifer J Cerda
- Department of Chemistry , University of Minnesota-Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Joel A Pedersen
- Environmental Chemistry and Technology Program , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Catherine J Murphy
- Department of Chemistry , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Erin E Carlson
- Department of Chemistry , University of Minnesota-Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Rigoberto Hernandez
- Department of Chemistry , Johns Hopkins University , Baltimore , Maryland 21218 , United States
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18
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Abstract
Understanding the cellular basis of human health and disease requires the spatial resolution of microscopy and the molecular-level details provided by spectroscopy. This review highlights imaging methods at the intersection of microscopy and spectroscopy with applications in cell biology. Imaging methods are divided into three broad categories: fluorescence microscopy, label-free approaches, and imaging tools that can be applied to multiple imaging modalities. Just as these imaging methods allow researchers to address new biological questions, progress in biological sciences will drive the development of new imaging methods. We highlight four topics in cell biology that illustrate the need for new imaging tools: nanoparticle-cell interactions, intracellular redox chemistry, neuroscience, and the increasing use of spheroids and organoids. Overall, our goal is to provide a brief overview of individual imaging methods and highlight recent advances in the use of microscopy for cell biology.
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Affiliation(s)
- Joshua D Morris
- School of Science and Technology, Georgia Gwinnett College, Lawrenceville, Georgia 30043, USA
| | - Christine K Payne
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA;
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19
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Li B, Zhang R, Shi X. Aggregation of amyloid peptides into fibrils driven by nanoparticles and their curvature effect. Phys Chem Chem Phys 2019; 21:1784-1790. [PMID: 30624452 DOI: 10.1039/c8cp07211f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fibrillation of amyloid peptides induces human diseases such as Alzheimer's disease, which has become a huge challenge. Some nanoparticles (NPs) could enhance peptide fibrillation by decreasing the lag time, yet how the size and shape of NPs affect amyloid fibrillation as well as the underlying mechanism remains unclear. Here, we investigated amyloid fibrillation on the surface of spherical NPs and cylindrical nanorods (NRs) of different sizes using coarse-grained Monte Carlo simulations. We focused on the curvature effect of NPs/NRs on the adsorption and fibrillation of peptide chains due to the size/shape difference. As the size of the NPs/NRs increases, the number of assembled peptide chains shows a non-monotonic tendency, and there is an optimal size for the highest adsorption. In most cases, the NRs could adsorb more peptides than the NPs of the same diameter due to the lower curvature. The mechanism beneath these observations was elucidated from a thermodynamic point of view. Our findings could provide a physical basis for the adsorption and fibrillation of amyloid peptides on NPs, and guide the design of future curvature-dependent NP-based amyloid treatment.
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Affiliation(s)
- Bin Li
- Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing 100190, P. R. China.
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20
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Zou X, Wei S, Badieyan S, Schroeder M, Jasensky J, Brooks CL, Marsh ENG, Chen Z. Investigating the Effect of Two-Point Surface Attachment on Enzyme Stability and Activity. J Am Chem Soc 2018; 140:16560-16569. [DOI: 10.1021/jacs.8b08138] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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21
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Bush DB, Knotts TA. The effects of antigen size, binding site valency, and flexibility on fab-antigen binding near solid surfaces. J Chem Phys 2018; 149:165102. [PMID: 30384722 DOI: 10.1063/1.5045356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Next generation antibody microarray devices have the potential to outperform current molecular detection methods and realize new applications in medicine, scientific research, and national defense. However, antibody microarrays, or arrays of antibody fragments ("fabs"), continue to evade mainstream use in part due to persistent reliability problems despite improvements to substrate design and protein immobilization strategies. Other factors could be disrupting microarray performance, including effects resulting from antigen characteristics. Target molecules embody a wide range of sizes, shapes, number of epitopes, epitope accessibility, and other physical and chemical properties. As a result, it may not be ideal for microarray designs to utilize the same substrate or immobilization strategy for all of the capture molecules. This study investigates how three antigen properties, such as size, binding site valency, and molecular flexibility, affect fab binding. The work uses an advanced, experimentally validated, coarse-grain model and umbrella sampling to calculate the free energy of ligand binding and how this energy landscape is different on the surface compared to in the bulk. The results confirm that large antigens interact differently with immobilized fabs compared to smaller antigens. Analysis of the results shows that despite these differences, tethering fabs in an upright orientation on hydrophilic surfaces is the best configuration for antibody microarrays.
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Affiliation(s)
- Derek B Bush
- Department of Chemical Engineering, Brigham Young University Provo, Provo, Utah 84602, USA
| | - Thomas A Knotts
- Department of Chemical Engineering, Brigham Young University Provo, Provo, Utah 84602, USA
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22
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Tavakol M, Montazeri A, Naghdabadi R, Hajipour MJ, Zanganeh S, Caracciolo G, Mahmoudi M. Disease-related metabolites affect protein-nanoparticle interactions. NANOSCALE 2018; 10:7108-7115. [PMID: 29616243 DOI: 10.1039/c7nr09502c] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Once in biological fluids, the surface of nanoparticles (NPs) is rapidly covered with a layer of biomolecules (i.e., the "protein corona") whose composition strongly determines their biological identity, regulates interactions with biological entities including cells and the immune system, and consequently directs the biological fate and pharmacokinetics of nanoparticles. We recently introduced the concept of a "personalized protein corona" which refers to the formation of different biological identities of the exact same type of NP after being exposed to extract plasmas from individuals who have various types of diseases. As different diseases have distinct metabolomic profiles and metabolites can interact with proteins, it is legitimate to hypothesize that metabolomic profiles in plasma may have the capacity to, at least partially, drive the formation of a personalized protein corona. To test this hypothesis, we employed a multi-scale approach composed of coarse-grained (CG) and all atom (AA) molecular dynamics (MD) simulations to probe the role of glucose and cholesterol (model metabolites in diabetes and hypercholesterolemia patients) in the interaction of fibrinogen protein and polystyrene NPs. Our results revealed that glucose and cholesterol had the capacity to induce substantial changes in the binding site of fibrinogen to the surface of NPs. More specifically, the simulation results demonstrated that increasing the metabolite amount could change the profiles of fibrinogen adsorption and replacement, what is known as the Vroman effect, on the NP surface. In addition, we also found out that metabolites can substantially determine the immune triggering potency of the fibrinogen-NP complex. Our proof-of-concept outcomes further emphasize the need for the development of patient-specific NPs in a disease type-specific manner for high yielding and safe clinical applications.
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Affiliation(s)
- Mahdi Tavakol
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
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23
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Gianneli M, Polo E, Lopez H, Castagnola V, Aastrup T, Dawson KA. Label-free in-flow detection of receptor recognition motifs on the biomolecular corona of nanoparticles. NANOSCALE 2018; 10:5474-5481. [PMID: 29511756 DOI: 10.1039/c7nr07887k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Nanomedicine, nanotargeting and nanotherapeutics have in the last few years faced several difficulties in translating the promising results obtained in vitro to an in vivo scenario. The origin of this discrepancy might be found in the lack of a detailed and realistic characterization of the biological surface of nanoparticles. Despite the capability to engineer nanomaterials with a great variety and a precise control of the surface functionalization, the targeting capability is lost when the nanoparticles are embedded in complex biological media, due to the formation of a biological layer (biomolecular corona). This biological layer represents the ultimate nanoparticle surface, likely to interact with the cell machinery. Therefore, in addition to traditional nanoparticle characterization techniques, a more insightful investigation of the biomolecular corona is needed, including the capability to assess the orientation and functionality of specific key molecular features. Here we present a method for the rapid screening of exposed protein recognition motifs on the surface of nanoparticles exploiting quartz crystal microbalance (QCM). We quantify accessible functional epitopes of transferrin-coated nanoparticles and correlate them to differences in nanoparticle size and functionalization. The target recognition occurs label free in flow, thereby pushing our investigation into a more in vivo-like scenario. Our method is applicable to a wide array of nanoparticles and therefore holds the potential to become an advanced technique for the classification of all kinds of nanobioconstructs based on their biological external functionality.
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Affiliation(s)
- M Gianneli
- Attana AB, Greta Arwidssons Väg 21, SE-11419 Stockholm, Sweden
| | - E Polo
- Centre for BioNano Interactions, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Dublin, Ireland.
| | - H Lopez
- Centre for BioNano Interactions, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Dublin, Ireland.
| | - V Castagnola
- Centre for BioNano Interactions, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Dublin, Ireland.
| | - T Aastrup
- Attana AB, Greta Arwidssons Väg 21, SE-11419 Stockholm, Sweden
| | - K A Dawson
- Centre for BioNano Interactions, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Dublin, Ireland.
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24
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Mahmoudi M. Debugging Nano-Bio Interfaces: Systematic Strategies to Accelerate Clinical Translation of Nanotechnologies. Trends Biotechnol 2018; 36:755-769. [PMID: 29559165 DOI: 10.1016/j.tibtech.2018.02.014] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 02/23/2018] [Accepted: 02/26/2018] [Indexed: 12/21/2022]
Abstract
Despite considerable efforts in the field of nanomedicine that have been made by researchers, funding agencies, entrepreneurs, and the media, fewer nanoparticle (NP) technologies than expected have made it to clinical trials. The wide gap between the efforts and effective clinical translation is, at least in part, due to multiple overlooked factors in both in vitro and in vivo environments, a poor understanding of the nano-bio interface, and misinterpretation of the data collected in vitro, all of which reduce the accuracy of predictions regarding the NPs' fate and safety in humans. To minimize this bench-to-clinic gap, which may accelerate successful clinical translation of NPs, this opinion paper aims to introduce strategies for systematic debugging of nano-bio interfaces in the current literature.
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Affiliation(s)
- Morteza Mahmoudi
- Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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25
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Runa S, Hussey M, Payne CK. Nanoparticle-Cell Interactions: Relevance for Public Health. J Phys Chem B 2018; 122:1009-1016. [PMID: 29111728 PMCID: PMC5789389 DOI: 10.1021/acs.jpcb.7b08650] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/30/2017] [Indexed: 12/21/2022]
Abstract
Nanoparticles, especially metal oxide nanoparticles, are used in a wide range of commercial and industrial applications that result in direct human contact, such as titanium dioxide nanoparticles in paints, food colorings, and cosmetics, or indirectly through release of nanoparticle-containing materials into the environment. Workers who process nanoparticles for downstream applications are exposed to especially high concentrations of nanoparticles. For physical chemists, nanoparticles present an interesting area of study as the small size of nanoparticles changes the properties from that of the bulk material, leading to novel properties and reactivity. For the public health community, this reduction in particle size means that exposure limits and outcomes that were determined from bulk material properties are not necessarily valid. Informed determination of exposure limits requires a fundamental understanding of how nanoparticles interact with cells. This Feature Article highlights the areas of intersection between physical chemistry and public health in understanding nanoparticle-cell interactions, with a focus on titanium dioxide nanoparticles. It provides an overview of recent research examining the interaction of titanium dioxide nanoparticles with cells in the absence of UV light and provides recommendations for additional nanoparticle-cell research in which physical chemistry expertise could help to inform the public health community.
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Affiliation(s)
- Sabiha Runa
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332, United
States
| | - Michael Hussey
- Rollins
School of Public Health, Emory University, Atlanta, Georgia 30322, United States
| | - Christine K. Payne
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332, United
States
- Parker
H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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