1
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Soliman MG, Trinh DN, Ravagli C, Meleady P, Henry M, Movia D, Doumett S, Cappiello L, Prina-Mello A, Baldi G, Monopoli MP. Development of a fast and simple method for the isolation of superparamagnetic iron oxide nanoparticles protein corona from protein-rich matrices. J Colloid Interface Sci 2024; 659:503-519. [PMID: 38184993 DOI: 10.1016/j.jcis.2023.11.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 01/09/2024]
Abstract
The adsorption of proteins onto the surface of nanoparticle (NP) leads to the formation of the so-called "protein corona" as consisting both loosely and tightly bound proteins. It is well established that the biological identity of NPs that may be acquired after exposure to a biological matrix is mostly provided by the components of the hard corona as the pristine surface is generally less accessible for binding. For that reason, the isolation and the characterisation of the NP-corona complexes and identification of the associated biomolecules can help in understanding its biological behaviour. Established methods for the isolation of the NP-HC complexes are time-demanding and can lead to different results based on the isolation method applied. Herein, we have developed a fast and simple method using ferromagnetic beads isolated from commercial MACS column and used for the isolation of superparamagnetic NP following exposure to different types of biological milieu. We first demonstrated the ability to easily isolate superparamagnetic iron oxide NPs (IONPs) from different concentrations of human blood plasma, and also tested the method on the corona isolation using more complex biological matrices, such as culture medium containing pulmonary mucus where the ordinary corona methods cannot be applied. Our developed method showed less than 20% difference in plasma corona composition when compared with centrifugation. It also showed effective isolation of NP-HC complexes from mucus-containing culture media upon comparing with centrifugation and MACS columns, which failed to wash out the unbound proteins. Our study was supported with a full characterisation profile including dynamic light scattering, nanoparticle tracking analysis, analytical disk centrifuge, and zeta potentials. The biomolecules/ proteins composing the HC were separated by vertical gel electrophoresis and subsequently analysed by liquid chromatography-tandem mass spectrometry. In addition to our achievements in comparing different isolation methods to separate IONPs with corona from human plasma, this is the first study that provides a complete characterisation profile of particle protein corona after exposure in vitro to pulmonary mucus-containing culture media.
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Affiliation(s)
- Mahmoud G Soliman
- Chemistry Department, RCSI (Royal College of Surgeons in Ireland), 123 St Stephen Green, Dublin 2, Ireland; Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.
| | - Duong N Trinh
- Chemistry Department, RCSI (Royal College of Surgeons in Ireland), 123 St Stephen Green, Dublin 2, Ireland
| | - Costanza Ravagli
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Paula Meleady
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Michael Henry
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Dania Movia
- Laboratory for Biological Characterisation of Advanced Materials (LBCAM), Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin 8, Ireland; Applied Radiation Therapy Trinity (ARTT), Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin 8, Ireland
| | - Saer Doumett
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Laura Cappiello
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Adriele Prina-Mello
- Laboratory for Biological Characterisation of Advanced Materials (LBCAM), Trinity Translational Medicine Institute (TTMI), Trinity College Dublin, Dublin 8, Ireland; Nanomedicine and Molecular Imaging Group, Trinity Translational Medicine Institute (TTMI), School of Medicine, Trinity College Dublin, Dublin 8, Ireland
| | - Giovanni Baldi
- Research Center Colorobbia, Cericol, Colorobbia Consulting, Via Pietramarina 123, 50053, Vinci, Florence, Italy
| | - Marco P Monopoli
- Chemistry Department, RCSI (Royal College of Surgeons in Ireland), 123 St Stephen Green, Dublin 2, Ireland.
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2
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Saiding Q, Zhang Z, Chen S, Xiao F, Chen Y, Li Y, Zhen X, Khan MM, Chen W, Koo S, Kong N, Tao W. Nano-bio interactions in mRNA nanomedicine: Challenges and opportunities for targeted mRNA delivery. Adv Drug Deliv Rev 2023; 203:115116. [PMID: 37871748 DOI: 10.1016/j.addr.2023.115116] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 10/25/2023]
Abstract
Upon entering the biological milieu, nanomedicines swiftly interact with the surrounding tissue fluid, subsequently being enveloped by a dynamic interplay of biomacromolecules, such as carbohydrates, nucleic acids, and cellular metabolites, but with predominant serum proteins within the biological corona. A notable consequence of the protein corona phenomenon is the unintentional loss of targeting ligands initially designed to direct nanomedicines toward particular cells or organs within the in vivo environment. mRNA nanomedicine displays high demand for specific cell and tissue-targeted delivery to effectively transport mRNA molecules into target cells, where they can exert their therapeutic effects with utmost efficacy. In this review, focusing on the delivery systems and tissue-specific applications, we aim to update the nanomedicine population with the prevailing and still enigmatic paradigm of nano-bio interactions, a formidable hurdle in the pursuit of targeted mRNA delivery. We also elucidate the current impediments faced in mRNA therapeutics and, by contemplating prospective avenues-either to modulate the corona or to adopt an 'ally from adversary' approach-aim to chart a course for advancing mRNA nanomedicine.
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Affiliation(s)
- Qimanguli Saiding
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Zhongyang Zhang
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States; The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Shuying Chen
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Fan Xiao
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou, Zhejiang 311121, China; Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Yumeng Chen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Yongjiang Li
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Xueyan Zhen
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Muhammad Muzamil Khan
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Wei Chen
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Seyoung Koo
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States.
| | - Na Kong
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou, Zhejiang 311121, China; Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States.
| | - Wei Tao
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, United States.
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3
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Poulsen KM, Payne CK. Concentration and composition of the protein corona as a function of incubation time and serum concentration: an automated approach to the protein corona. Anal Bioanal Chem 2022; 414:7265-7275. [PMID: 36018335 DOI: 10.1007/s00216-022-04278-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/03/2022] [Accepted: 08/09/2022] [Indexed: 11/24/2022]
Abstract
Nanoparticles in contact with proteins form a "corona" of proteins adsorbed on the nanoparticle surface. Subsequent biological responses are then mediated by the adsorbed proteins rather than the bare nanoparticles. The use of nanoparticles as nanomedicines and biosensors would be greatly improved if researchers were able to predict which specific proteins will adsorb on a nanoparticle surface. We use a recently developed automated workflow with a liquid handling robot and low-cost proteomics to determine the concentration and composition of the protein corona formed on carboxylate-modified iron oxide nanoparticles (200 nm) as a function of incubation time and serum concentration. We measure the concentration of the resulting protein corona with a colorimetric assay and the composition of the corona with proteomics, reporting both abundance and enrichment relative to the fetal bovine serum (FBS) proteins used to form the corona. Incubation time was found to be an important parameter for corona concentration and composition at high (100% FBS) incubation concentrations, with only a slight effect at low (10%) FBS concentrations. In addition to these findings, we describe two methodological advances to help reduce the cost associated with protein corona experiments. We have automated the digest step necessary for proteomics and measured the variability between triplicate samples at each stage of the proteomics experiments. Overall, these results demonstrate the importance of understanding the multiple parameters that influence corona formation, provide new tools for corona characterization, and advance bioanalytical research in nanomaterials.
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Affiliation(s)
- Karsten M Poulsen
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Christine K Payne
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.
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4
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Hlaváček A, Farka Z, Mickert MJ, Kostiv U, Brandmeier JC, Horák D, Skládal P, Foret F, Gorris HH. Bioconjugates of photon-upconversion nanoparticles for cancer biomarker detection and imaging. Nat Protoc 2022; 17:1028-1072. [PMID: 35181766 DOI: 10.1038/s41596-021-00670-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 11/19/2021] [Indexed: 02/07/2023]
Abstract
The detection of cancer biomarkers in histological samples and blood is of paramount importance for clinical diagnosis. Current methods are limited in terms of sensitivity, hindering early detection of disease. We have overcome the shortcomings of currently available staining and fluorescence labeling methods by taking an integrative approach to establish photon-upconversion nanoparticles (UCNP) as a powerful platform for cancer detection. These nanoparticles are readily synthesized in different sizes to yield efficient and tunable short-wavelength light emission under near-infrared excitation, which eliminates optical background interference of the specimen. Here we present a protocol for the synthesis of UCNPs by high-temperature co-precipitation or seed-mediated growth by thermal decomposition, surface modification by silica or poly(ethylene glycol) that renders the particles resistant to nonspecific binding, and the conjugation of streptavidin or antibodies for biological detection. To detect blood-based biomarkers, we present an upconversion-linked immunosorbent assay for the analog and digital detection of the cancer marker prostate-specific antigen. When applied to immunocytochemistry analysis, UCNPs enable the detection of the breast cancer marker human epidermal growth factor receptor 2 with a signal-to-background ratio 50-fold higher than conventional fluorescent labels. UCNP synthesis takes 4.5 d, the preparation of the antibody-silica-UCNP conjugate takes 3 d, the streptavidin-poly(ethylene glycol)-UCNP conjugate takes 2-3 weeks, upconversion-linked immunosorbent assay takes 2-4 d and immunocytochemistry takes 8-10 h. The procedures can be performed after standard laboratory training in nanomaterials research.
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Affiliation(s)
- Antonín Hlaváček
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Brno, Czech Republic.
| | - Zdeněk Farka
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic. .,CEITEC MU, Masaryk University, Brno, Czech Republic.
| | | | - Uliana Kostiv
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Julian C Brandmeier
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic.,Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Regensburg, Germany
| | - Daniel Horák
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Petr Skládal
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic.,CEITEC MU, Masaryk University, Brno, Czech Republic
| | - František Foret
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Brno, Czech Republic
| | - Hans H Gorris
- Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czech Republic.
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5
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Lin CY, Yang CM, Lindén M. Dissolution and morphology evolution of mesoporous silica nanoparticles under biologically relevant conditions. J Colloid Interface Sci 2022; 608:995-1004. [PMID: 34785474 DOI: 10.1016/j.jcis.2021.09.164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/21/2021] [Accepted: 09/26/2021] [Indexed: 12/20/2022]
Abstract
Mesoporous silica nanoparticles (MSN) are promising drug vectors due to their high drug loading capacities, degradability under biologically relevant conditions. The dissolution of MSN has been the focus of several recent studies, most of which have, however, been carried out in the absence of proteins, and do therefore not reflect the conditions prevailing during in vitro or in vivo administration of the particles. Furthermore, typically the dissolution studies are limited with respect to the range of MSN concentrations applied. Here, we report results related to the dissolution kinetics and structural particle evolution for MCM-48 MSN carried out in the presence of proteins, and where the particle concentration has been used as a parameter to cover typical concentrations used in in vitro and in vivo studies involving MSNs. Proteins adsorbing to the MSN surface form a diffusion limiting layer that leads to the intermediate formation of core-shell structured particles upon dissolution. Here, the protein concentration controls the kinetics of this process, as the amount of protein adsorbing to the MSN increase with increasing protein concentration. The results thus also imply that the MSN dissolution kinetics is faster under normally applied in vitro conditions as compared to what can be expected under full serum conditions.
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Affiliation(s)
- Chih-Yu Lin
- Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Chia-Min Yang
- Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan; Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan.
| | - Mika Lindén
- University of Ulm, Institute of Inorganic Chemistry II, Albert-Einstein-Allee 11, Ulm 89081, Germany.
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6
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Assenhöj M, Eriksson P, Dönnes P, Ljunggren SA, Marcusson-Ståhl M, Du Rietz A, Uvdal K, Karlsson H, Cederbrant K. Protein interaction, monocyte toxicity and immunogenic properties of cerium oxide crystals with 5% or 14% gadolinium, cobalt oxide and iron oxide nanoparticles - an interdisciplinary approach. Nanotoxicology 2021; 15:1035-1058. [PMID: 34468264 DOI: 10.1080/17435390.2021.1966115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Metal oxide nanoparticles are widely used in both consumer products and medical applications, but the knowledge regarding exposure-related health effects is limited. However, it is challenging to investigate nanoparticle interaction processes with biological systems. The overall aim of this project was to improve the possibility to predict exposure-related health effects of metal oxide nanoparticles through interdisciplinary collaboration by combining workflows from the pharmaceutical industry, nanomaterial sciences, and occupational medicine. Specific aims were to investigate nanoparticle-protein interactions and possible adverse immune reactions. Four different metal oxide nanoparticles; CeOx nanocrystals with 5% or 14% Gd, Co3O4, and Fe2O3, were characterized by dynamic light scattering and high-resolution transmission electron microscopy. Nanoparticle-binding proteins were identified and screened for HLA-binding peptides in silico. Monocyte interaction with nanoparticle-protein complexes was assessed in vitro. Herein, for the first time, immunogenic properties of nanoparticle-binding proteins have been characterized. The present study indicates that especially Co3O4-protein complexes can induce both 'danger signals', verified by the production of inflammatory cytokines and simultaneously bind autologous proteins, which can be presented as immunogenic epitopes by MHC class II. The clinical relevance of these findings should be further evaluated to investigate the role of metal oxide nanoparticles in the development of autoimmune disease. The general workflow identified experimental difficulties, such as nanoparticle aggregate formation and a lack of protein-free buffers suitable for particle characterization, protein analyses, as well as for cell studies. This confirms the importance of future interdisciplinary collaborations.
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Affiliation(s)
- Maria Assenhöj
- Division of Occupational and Environmental Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Peter Eriksson
- Division of Molecular Surface Physics and Nanoscience, Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden
| | | | - Stefan A Ljunggren
- Division of Occupational and Environmental Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | | | - Anna Du Rietz
- Division of Molecular Surface Physics and Nanoscience, Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden
| | - Kajsa Uvdal
- Division of Molecular Surface Physics and Nanoscience, Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden
| | - Helen Karlsson
- Division of Occupational and Environmental Medicine, Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
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7
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Peltomaa R, Benito-Peña E, Gorris HH, Moreno-Bondi MC. Biosensing based on upconversion nanoparticles for food quality and safety applications. Analyst 2021; 146:13-32. [PMID: 33205784 DOI: 10.1039/d0an01883j] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Food safety and quality regulations inevitably call for sensitive and accurate analytical methods to detect harmful contaminants in food and to ensure safe food for the consumer. Both novel and well-established biorecognition elements, together with different transduction schemes, enable the simple and rapid analysis of various food contaminants. Upconversion nanoparticles (UCNPs) are inorganic nanocrystals that convert near-infrared light into shorter wavelength emission. This unique photophysical feature, along with narrow emission bandwidths and large anti-Stokes shift, render UCNPs excellent optical labels for biosensing because they can be detected without optical background interferences from the sample matrix. In this review, we show how this exciting technique has evolved into biosensing platforms for food quality and safety monitoring and highlight recent applications in the field.
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Affiliation(s)
- Riikka Peltomaa
- Department of Biochemistry/Biotechnology, University of Turku, Kiinamyllynkatu 10, 20520, Turku, Finland
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8
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Kruszewska J, Zajda J, Matczuk M. How to effectively prepare a sample for bottom-up proteomic analysis of nanoparticle protein corona? A critical review. Talanta 2021; 226:122153. [PMID: 33676702 DOI: 10.1016/j.talanta.2021.122153] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/22/2021] [Accepted: 01/23/2021] [Indexed: 02/08/2023]
Abstract
Since the interest in the biomedical applications of inorganic nanoparticles (NPs) has rapidly grown over the last decades, there is a need for a thorough characterization of bio-nano interactions. NPs introduced to the body (mostly intravenously) encounter plasma proteins, that instantly create a so-called "protein corona" on the NPs surface, giving the nanomaterial a new biological identity. Type of the proteins that interact with NPs may affect the in vivo fate of NPs. For that reason, it is particularly important to establish analytical methods capable of corona protein identification. Bottom-up proteomics is most often used for that purpose. A crucial part of the experiment is sample preparation, as it is already proven that different protocols may lead to distinct results. This review is aimed at providing a characterization of two main stages of sample preparation: separation of NPs with protein corona from the unbound proteins and the digestion of corona proteins. Separation techniques such as centrifugation, magnetic separation, and chromatography and three digestion methods (in-gel, in-solution, and on-particle) are described with special emphasis paid on their advantages and disadvantages as well as their influence on the result of identification. This paper also indicates the need for standardization of protein corona identification protocols, as some of the proteins may be preferentially detected while applying a particular digestion procedure.
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Affiliation(s)
- Joanna Kruszewska
- Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664, Warsaw, Poland
| | - Joanna Zajda
- Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664, Warsaw, Poland
| | - Magdalena Matczuk
- Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego St. 3, 00-664, Warsaw, Poland.
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9
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Aliyandi A, Zuhorn IS, Salvati A. Disentangling Biomolecular Corona Interactions With Cell Receptors and Implications for Targeting of Nanomedicines. Front Bioeng Biotechnol 2020; 8:599454. [PMID: 33363128 PMCID: PMC7758247 DOI: 10.3389/fbioe.2020.599454] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 11/17/2020] [Indexed: 12/12/2022] Open
Abstract
Nanoparticles are promising tools for nanomedicine in a wide array of therapeutic and diagnostic applications. Yet, despite the advances in the biomedical applications of nanomaterials, relatively few nanomedicines made it to the clinics. The formation of the biomolecular corona on the surface of nanoparticles has been known as one of the challenges toward successful targeting of nanomedicines. This adsorbed protein layer can mask targeting moieties and creates a new biological identity that critically affects the subsequent biological interactions of nanomedicines with cells. Extensive studies have been directed toward understanding the characteristics of this layer of biomolecules and its implications for nanomedicine outcomes at cell and organism levels, yet several aspects are still poorly understood. One aspect that still requires further insights is how the biomolecular corona interacts with and is “read” by the cellular machinery. Within this context, this review is focused on the current understanding of the interactions of the biomolecular corona with cell receptors. First, we address the importance and the role of receptors in the uptake of nanoparticles. Second, we discuss the recent advances and techniques in characterizing and identifying biomolecular corona-receptor interactions. Additionally, we present how we can exploit the knowledge of corona-cell receptor interactions to discover novel receptors for targeting of nanocarriers. Finally, we conclude this review with an outlook on possible future perspectives in the field. A better understanding of the first interactions of nanomaterials with cells, and -in particular -the receptors interacting with the biomolecular corona and involved in nanoparticle uptake, will help for the successful design of nanomedicines for targeted delivery.
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Affiliation(s)
- Aldy Aliyandi
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, Netherlands
| | - Inge S Zuhorn
- Department of Biomedical Engineering, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Anna Salvati
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy, University of Groningen, Groningen, Netherlands
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Monge M, Fornaguera C, Quero C, Dols-Perez A, Calderó G, Grijalvo S, García-Celma MJ, Rodríguez-Abreu C, Solans C. Functionalized PLGA nanoparticles prepared by nano-emulsion templating interact selectively with proteins involved in the transport through the blood-brain barrier. Eur J Pharm Biopharm 2020; 156:155-164. [PMID: 32927077 DOI: 10.1016/j.ejpb.2020.09.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/30/2020] [Accepted: 09/05/2020] [Indexed: 01/13/2023]
Abstract
During the last few decades, extensive efforts has been made to design nanocarriers to transport drugs into the central nervous system (CNS). However, its efficacy is limited due to the presence of the Blood-Brain Barrier (BBB) which greatly reduces drug penetration making Drug Delivery Systems (DDS) necessary. Polymeric nanoparticles (NPs) have been reported to be appropriate for this purpose and in particular, poly(lactic-co-glycolic acid) (PLGA) has been used for its ability to entrap small molecule drugs with great efficiency and the ease with which it functionalizes NPs. Despite the fact that their synthetic identity has been studied in depth, the biological identity of such manufactured polymers still remains unknown as does their biodistribution and in vivo fate. This biological identity is a result of their interaction with blood proteins, the so-called "protein corona" which tends to alter the behavior of polymeric nanoparticles in the body. The aim of the present research is to identify the proteins bounded to polymeric nanoparticles designed to selectively interact with the BBB. For this purpose, four different PLGA NPs were prepared and analyzed: (i) "PLGA@Drug," in which a model drug was encapsulated in its core; (ii) "8D3-PLGA" NPs where the PLGA surface was functionalized with a monoclonal anti-transferrin receptor antibody (8D3 mAb) in order to specifically target the BBB; (iii) "8D3-PLGA@Drug" in which the PLGA@Drug surface was functionalized using the same antibody described above and (iv) bare PLGA NPs which were used as a control. Once the anticipated protein corona NPs were obtained, proteins decorating both bare and functionalized PLGA NPs were isolated and analyzed. Apart from the indistinct interaction with PLGA NPs with the most abundant serum proteins, specific proteins could also be identified in the case of functionalized PLGA NPs. These findings may provide valuable insight into designing novel vehicles based on PLGA NPs for crossing the BBB.
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Affiliation(s)
- Marta Monge
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Department of Pharmacy, Pharmaceutical Technology, and Physicochemistry, IN2UB, R+D Associated Unit to CSIC Pharmaceutical Nanotechnology, University of Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Cristina Fornaguera
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Carme Quero
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain
| | - Aurora Dols-Perez
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Gabriela Calderó
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Santiago Grijalvo
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain.
| | - María José García-Celma
- Department of Pharmacy, Pharmaceutical Technology, and Physicochemistry, IN2UB, R+D Associated Unit to CSIC Pharmaceutical Nanotechnology, University of Barcelona, Joan XXIII 27-31, 08028 Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Carlos Rodríguez-Abreu
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
| | - Conxita Solans
- Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Spain
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11
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Francia V, Schiffelers RM, Cullis PR, Witzigmann D. The Biomolecular Corona of Lipid Nanoparticles for Gene Therapy. Bioconjug Chem 2020; 31:2046-2059. [PMID: 32786370 DOI: 10.1021/acs.bioconjchem.0c00366] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Gene therapy holds great potential for treating almost any disease by gene silencing, protein expression, or gene correction. To efficiently deliver the nucleic acid payload to its target tissue, the genetic material needs to be combined with a delivery platform. Lipid nanoparticles (LNPs) have proven to be excellent delivery vectors for gene therapy and are increasingly entering into routine clinical practice. Over the past two decades, the optimization of LNP formulations for nucleic acid delivery has led to a well-established body of knowledge culminating in the first-ever RNA interference therapeutic using LNP technology, i.e., Onpattro, and many more in clinical development to deliver various nucleic acid payloads. Screening a lipid library in vivo for optimal gene silencing potency in hepatocytes resulted in the identification of the Onpattro formulation. Subsequent studies discovered that the key to Onpattro's liver tropism is its ability to form a specific "biomolecular corona". In fact, apolipoprotein E (ApoE), among other proteins, adsorbed to the LNP surface enables specific hepatocyte targeting. This proof-of-principle example demonstrates the use of the biomolecular corona for targeting specific receptors and cells, thereby opening up the road to rationally designing LNPs. To date, however, only a few studies have explored in detail the corona of LNPs, and how to efficiently modulate the corona remains poorly understood. In this review, we summarize recent discoveries about the biomolecular corona, expanding the knowledge gained with other nanoparticles to LNPs for nucleic acid delivery. In particular, we address how particle stability, biodistribution, and targeting of LNPs can be influenced by the biological environment. Onpattro is used as a case study to describe both the successful development of an LNP formulation for gene therapy and the key influence of the biological environment. Moreover, we outline the techniques available to isolate and analyze the corona of LNPs, and we highlight their advantages and drawbacks. Finally, we discuss possible implications of the biomolecular corona for LNP delivery and we examine the potential of exploiting the corona as a targeting strategy beyond the liver to develop next-generation gene therapies.
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Affiliation(s)
- Valentina Francia
- Department of Biochemistry and Molecular Biology, University of British Columbia, V6T 1Z3, Vancouver, British Columbia, Canada.,Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, 3584 CX, Utrecht, Netherlands
| | - Raymond M Schiffelers
- Department of Clinical Chemistry and Haematology, University Medical Center Utrecht, 3584 CX, Utrecht, Netherlands
| | - Pieter R Cullis
- Department of Biochemistry and Molecular Biology, University of British Columbia, V6T 1Z3, Vancouver, British Columbia, Canada.,NanoMedicines Innovation Network (NMIN), University of British Columbia, V6T 1Z3, Vancouver, British Columbia, Canada
| | - Dominik Witzigmann
- Department of Biochemistry and Molecular Biology, University of British Columbia, V6T 1Z3, Vancouver, British Columbia, Canada.,NanoMedicines Innovation Network (NMIN), University of British Columbia, V6T 1Z3, Vancouver, British Columbia, Canada
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12
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Sanchez-Guzman D, Giraudon-Colas G, Marichal L, Boulard Y, Wien F, Degrouard J, Baeza-Squiban A, Pin S, Renault JP, Devineau S. In Situ Analysis of Weakly Bound Proteins Reveals Molecular Basis of Soft Corona Formation. ACS NANO 2020; 14:9073-9088. [PMID: 32633939 DOI: 10.1021/acsnano.0c04165] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Few experimental techniques allow the analysis of the protein corona in situ. As a result, little is known on the effects of nanoparticles on weakly bound proteins that form the soft corona. Despite its biological importance, our understanding of the molecular bases driving its formation is limited. Here, we show that hemoglobin can form either a hard or a soft corona on silica nanoparticles depending on the pH conditions. Using cryoTEM and synchrotron-radiation circular dichroism, we show that nanoparticles alter the structure and the stability of weakly bound proteins in situ. Molecular dynamics simulation identified the structural elements driving protein-nanoparticle interaction. Based on thermodynamic analysis, we show that nanoparticles stabilize partially unfolded protein conformations by enthalpy-driven molecular interactions. We suggest that nanoparticles alter weakly bound proteins by shifting the equilibrium toward the unfolded states at physiological temperature. We show that the classical approach based on nanoparticle separation from the biological medium fails to detect destabilization of weakly bound proteins, and therefore cannot be used to fully predict the biological effects of nanomaterials in situ.
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Affiliation(s)
| | | | - Laurent Marichal
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay Cedex, France
| | - Yves Boulard
- Université Paris-Saclay, CEA, CNRS, I2BC, B3S, Gif-sur-Yvette 91190, France
| | - Frank Wien
- Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France
| | - Jéril Degrouard
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay Cedex, France
| | | | - Serge Pin
- Université Paris-Saclay, CEA, CNRS, NIMBE, Gif-sur-Yvette 91190, France
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13
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Böhmert L, Voß L, Stock V, Braeuning A, Lampen A, Sieg H. Isolation methods for particle protein corona complexes from protein-rich matrices. NANOSCALE ADVANCES 2020; 2:563-582. [PMID: 36133244 PMCID: PMC9417621 DOI: 10.1039/c9na00537d] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 01/08/2020] [Indexed: 05/20/2023]
Abstract
Background: Nanoparticles become rapidly encased by a protein layer when they are in contact with biological fluids. This protein shell is called a corona. The composition of the corona has a strong influence on the surface properties of the nanoparticles. It can affect their cellular interactions, uptake and signaling properties. For this reason, protein coronae are investigated frequently as an important part of particle characterization. Main body of the abstract: The protein corona can be analyzed by different methods, which have their individual advantages and challenges. The separation techniques to isolate corona-bound particles from the surrounding matrices include centrifugation, magnetism and chromatographic methods. Different organic matrices, such as blood, blood serum, plasma or different complex protein mixtures, are used and the approaches vary in parameters such as time, concentration and temperature. Depending on the investigated particle type, the choice of separation method can be crucial for the subsequent results. In addition, it is important to include suitable controls to avoid misinterpretation and false-positive or false-negative results, thus allowing the achievement of a valuable protein corona analysis result. Conclusion: Protein corona studies are an important part of particle characterization in biological matrices. This review gives a comparative overview about separation techniques, experimental parameters and challenges which occur during the investigation of the protein coronae of different particle types.
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Affiliation(s)
- Linda Böhmert
- German Federal Institute for Risk Assessment, Dept. Food Safety Max-Dohrn-Str. 8-10 10589 Berlin Germany +49 (30) 18412-25800
| | - Linn Voß
- German Federal Institute for Risk Assessment, Dept. Food Safety Max-Dohrn-Str. 8-10 10589 Berlin Germany +49 (30) 18412-25800
| | - Valerie Stock
- German Federal Institute for Risk Assessment, Dept. Food Safety Max-Dohrn-Str. 8-10 10589 Berlin Germany +49 (30) 18412-25800
| | - Albert Braeuning
- German Federal Institute for Risk Assessment, Dept. Food Safety Max-Dohrn-Str. 8-10 10589 Berlin Germany +49 (30) 18412-25800
| | - Alfonso Lampen
- German Federal Institute for Risk Assessment, Dept. Food Safety Max-Dohrn-Str. 8-10 10589 Berlin Germany +49 (30) 18412-25800
| | - Holger Sieg
- German Federal Institute for Risk Assessment, Dept. Food Safety Max-Dohrn-Str. 8-10 10589 Berlin Germany +49 (30) 18412-25800
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14
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Li Z, Wang Y, Zhu J, Zhang Y, Zhang W, Zhou M, Luo C, Li Z, Cai B, Gui S, He Z, Sun J. Emerging well-tailored nanoparticulate delivery system based on in situ regulation of the protein corona. J Control Release 2020; 320:1-18. [PMID: 31931050 DOI: 10.1016/j.jconrel.2020.01.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/02/2020] [Accepted: 01/04/2020] [Indexed: 12/12/2022]
Abstract
The protein corona significantly changes the nanoparticle (NP) identity both physicochemically and biologically, and in situ regulation of specific plasma protein adsorption on NP surfaces has emerged as a promising strategy for disease-targeting therapy. In the past decade, great progress in protein corona regulation has been achieved via surface chemistry-based nanomedicine development. This review first outlines the latest advances in bio-nano interactions, with special attention to factors that influence the protein corona, including NP physicochemical properties, the biological environment and the duration time. Second, NP surface chemistry strategies designed to inhibit and regulate protein corona formation are highlighted, with special emphasis on albumin, transferrin, apolipoprotein (apo) E, vascular endothelial growth factor (VEGF) and retinol binding protein 4 (RBP4). Finally, the current techniques used to characterize the protein corona are briefly discussed.
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Affiliation(s)
- Zhenbao Li
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China; Engineering Technology Research Center of Modernized Pharmaceutics, Anhui Province, China.
| | - Yongqi Wang
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China; Engineering Technology Research Center of Modernized Pharmaceutics, Anhui Province, China
| | - Jiaojiao Zhu
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China; Engineering Technology Research Center of Modernized Pharmaceutics, Anhui Province, China
| | - Yachao Zhang
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China; Engineering Technology Research Center of Modernized Pharmaceutics, Anhui Province, China
| | - Wenjing Zhang
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China; Engineering Technology Research Center of Modernized Pharmaceutics, Anhui Province, China
| | - Mei Zhou
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China
| | - Cong Luo
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Zegeng Li
- The First Affiliated Hospital of Anhui University of traditional Chinese Medicine, Anhui 230038, China
| | - Biao Cai
- School of Integrated Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Shuangying Gui
- College of Pharmacy, Anhui University of Chinese Medicine and Anhui Academy of Chinese Medicine, Hefei 230012, China; Engineering Technology Research Center of Modernized Pharmaceutics, Anhui Province, China.
| | - Zhonggui He
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Jin Sun
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China
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15
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Gubala V, Giovannini G, Kunc F, Monopoli MP, Moore CJ. Dye-doped silica nanoparticles: synthesis, surface chemistry and bioapplications. Cancer Nanotechnol 2020. [DOI: 10.1186/s12645-019-0056-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Abstract
Background
Fluorescent silica nanoparticles have been extensively utilised in a broad range of biological applications and are facilitated by their predictable, well-understood, flexible chemistry and apparent biocompatibility. The ability to couple various siloxane precursors with fluorescent dyes and to be subsequently incorporated into silica nanoparticles has made it possible to engineer these fluorophores-doped nanomaterials to specific optical requirements in biological experimentation. Consequently, this class of nanomaterial has been used in applications across immunodiagnostics, drug delivery and human-trial bioimaging in cancer research.
Main body
This review summarises the state-of-the-art of the use of dye-doped silica nanoparticles in bioapplications and firstly accounts for the common nanoparticle synthesis methods, surface modification approaches and different bioconjugation strategies employed to generate biomolecule-coated nanoparticles. The use of dye-doped silica nanoparticles in immunoassays/biosensing, bioimaging and drug delivery is then provided and possible future directions in the field are highlighted. Other non-cancer-related applications involving silica nanoparticles are also briefly discussed. Importantly, the impact of how the protein corona has changed our understanding of NP interactions with biological systems is described, as well as demonstrations of its capacity to be favourably manipulated.
Conclusions
Dye-doped silica nanoparticles have found success in the immunodiagnostics domain and have also shown promise as bioimaging agents in human clinical trials. Their use in cancer delivery has been restricted to murine models, as has been the case for the vast majority of nanomaterials intended for cancer therapy. This is hampered by the need for more human-like disease models and the lack of standardisation towards assessing nanoparticle toxicity. However, developments in the manipulation of the protein corona have improved the understanding of fundamental bio–nano interactions, and will undoubtedly assist in the translation of silica nanoparticles for disease treatment to the clinic.
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16
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Chen Y, Ge Q. A Bifunctional Zwitterion That Serves as Both a Membrane Modifier and a Draw Solute for Forward Osmosis Wastewater Treatment. ACS APPLIED MATERIALS & INTERFACES 2019; 11:36118-36129. [PMID: 31498984 DOI: 10.1021/acsami.9b13142] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Producing clean water and simultaneously recovering valuable compounds are a big challenge in wastewater treatment. Here we designed a bifunctional zwitterion of (1-(3-aminopropyl)imidazole) propanesulfonate (APIS) for membrane modification and being a draw solute as well for water production and protein enrichment via forward osmosis (FO). Immobilized to the membrane surface by a fast amidation reaction, APIS endows the membrane with favorable properties benefiting the FO process. The APIS-modified sulfonated poly(ether sulfone) (APIS-sPES) membrane produces a water flux 101% higher than that of the nascent membrane (from 9.3 to 18.7 LMH) with 0.5 M NaCl as the draw solution. The APIS-sPES membrane also exhibits higher fouling resistance with a much smaller decline in water permeation and stronger renewability with the flux restored to 88% of the original value compared to a 59% recovery rate of the nascent membrane after 20-h experiments against a 200 ppm ovalbumin solution. APIS produces a fair good water flux coupled with negligible reverse diffusion when used as a draw solute and can be readily regenerated via pH regulation. Unlike the conventional NaCl draw solute, APIS does not contaminate or damage protein structure. The APIS-sPES membrane and APIS draw solute prove a perfect match in protein-containing wastewater treatment and protein enrichment.
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Affiliation(s)
- Yichen Chen
- College of Environment and Resources , Fuzhou University , Fujian 350116 , China
| | - Qingchun Ge
- College of Environment and Resources , Fuzhou University , Fujian 350116 , China
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17
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Marichal L, Giraudon-Colas G, Cousin F, Thill A, Labarre J, Boulard Y, Aude JC, Pin S, Renault JP. Protein-Nanoparticle Interactions: What Are the Protein-Corona Thickness and Organization? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10831-10837. [PMID: 31333024 DOI: 10.1021/acs.langmuir.9b01373] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Protein adsorption on a surface is generally evaluated in terms of the evolution of the proteins' structures and functions. However, when the surface is that of a nanoparticle, the protein corona formed around it possesses a particular supramolecular structure that gives a "biological identity" to the new object. Little is known about the actual shape of the protein corona. Here, the protein corona formed by the adsorption of model proteins (myoglobin and hemoglobin) on silica nanoparticles was studied. Small-angle neutron scattering and oxygenation studies were combined to assess both the structural and functional impacts of the adsorption on proteins. Large differences in the oxygenation properties could be found while no significant global shape changes were seen after adsorption. Moreover, the structural study showed that the adsorbed proteins form an organized yet discontinuous monolayer around the nanoparticles.
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Affiliation(s)
| | | | - Fabrice Cousin
- Laboratoire Léon-Brillouin, UMR 12 CEA-CNRS , Université Paris-Saclay, CEA-Saclay , Gif-sur-Yvette 91191 , France
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18
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Castillo RR, Vallet-Regí M. Functional Mesoporous Silica Nanocomposites: Biomedical applications and Biosafety. Int J Mol Sci 2019; 20:E929. [PMID: 30791663 PMCID: PMC6413128 DOI: 10.3390/ijms20040929] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 02/07/2023] Open
Abstract
The rise and development of nanotechnology has enabled the creation of a wide number of systems with new and advantageous features to treat cancer. However, in many cases, the lone application of these new nanotherapeutics has proven not to be enough to achieve acceptable therapeutic efficacies. Hence, to avoid these limitations, the scientific community has embarked on the development of single formulations capable of combining functionalities. Among all possible components, silica-either solid or mesoporous-has become of importance as connecting and coating material for these new-generation therapeutic nanodevices. In the present review, the most recent examples of fully inorganic silica-based functional composites are visited, paying particular attention to those with potential biomedical applicability. Additionally, some highlights will be given with respect to their possible biosafety issues based on their chemical composition.
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Affiliation(s)
- Rafael R Castillo
- Dpto. Química en Ciencias Farmacéuticas. Facultad de Farmacia, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain.
- Centro de Investigación Biomédica en Red-CIBER, 28029 Madrid, Spain.
- Instituto de Investigación Sanitaria Hospital 12 de Octubre-imas12, 28041 Madrid, Spain.
| | - María Vallet-Regí
- Dpto. Química en Ciencias Farmacéuticas. Facultad de Farmacia, Universidad Complutense de Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain.
- Centro de Investigación Biomédica en Red-CIBER, 28029 Madrid, Spain.
- Instituto de Investigación Sanitaria Hospital 12 de Octubre-imas12, 28041 Madrid, Spain.
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19
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Weiss ACG, Krüger K, Besford QA, Schlenk M, Kempe K, Förster S, Caruso F. In Situ Characterization of Protein Corona Formation on Silica Microparticles Using Confocal Laser Scanning Microscopy Combined with Microfluidics. ACS APPLIED MATERIALS & INTERFACES 2019; 11:2459-2469. [PMID: 30600987 DOI: 10.1021/acsami.8b14307] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In biological fluids, proteins bind to particles, forming so-called protein coronas. Such adsorbed protein layers significantly influence the biological interactions of particles, both in vitro and in vivo. The adsorbed protein layer is generally described as a two-component system comprising "hard" and "soft" protein coronas. However, a comprehensive picture regarding the protein corona structure is lacking. Herein, we introduce an experimental approach that allows for in situ monitoring of protein adsorption onto silica microparticles. The technique, which mimics flow in vascularized tumors, combines confocal laser scanning microscopy with microfluidics and allows the study of the time-evolution of protein corona formation. Our results show that protein corona formation is kinetically divided into three different phases: phase 1, proteins irreversibly and directly bound (under physiologically relevant conditions) to the particle surface; phase 2, irreversibly bound proteins interacting with preadsorbed proteins, and phase 3, reversibly bound "soft" protein corona proteins. Additionally, we investigate particle-protein interactions on low-fouling zwitterionic-coated particles where the adsorption of irreversibly bound proteins does not occur, and on such particles, only a "soft" protein corona is formed. The reported approach offers the potential to define new state-of-the art procedures for kinetics and protein fouling experiments.
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Affiliation(s)
- Alessia C G Weiss
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , 3010 Victoria , Australia
| | - Kilian Krüger
- Physical Chemistry I , University of Bayreuth , Universitätsstraβe 30 , 95447 Bayreuth , Germany
- JCSN-1/ICS-1 , Forschungszentrum Jülich GmbH , Wilhelm-Johnen-Straβe , 52428 Jülich , Germany
| | - Quinn A Besford
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , 3010 Victoria , Australia
| | - Mathias Schlenk
- Physical Chemistry I , University of Bayreuth , Universitätsstraβe 30 , 95447 Bayreuth , Germany
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and Monash Institute of Pharmaceutical Sciences , Monash University , Parkville , 3052 Victoria , Australia
| | - Stephan Förster
- Physical Chemistry I , University of Bayreuth , Universitätsstraβe 30 , 95447 Bayreuth , Germany
- JCSN-1/ICS-1 , Forschungszentrum Jülich GmbH , Wilhelm-Johnen-Straβe , 52428 Jülich , Germany
- Physical Chemistry , RWTH Aachen University , 52074 Aachen , Germany
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering , The University of Melbourne , Parkville , 3010 Victoria , Australia
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20
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Oliveira H, Bednarkiewicz A, Falk A, Fröhlich E, Lisjak D, Prina‐Mello A, Resch S, Schimpel C, Vrček IV, Wysokińska E, Gorris HH. Critical Considerations on the Clinical Translation of Upconversion Nanoparticles (UCNPs): Recommendations from the European Upconversion Network (COST Action CM1403). Adv Healthc Mater 2019; 8:e1801233. [PMID: 30536962 DOI: 10.1002/adhm.201801233] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/20/2018] [Indexed: 11/07/2022]
Abstract
The unique photoluminescent properties of upconversion nanoparticles (UCNPs) have attracted worldwide research interest and inspired many bioanalytical applications. The anti-Stokes emission with long luminescence lifetimes, narrow and multiple absorption and emission bands, and excellent photostability enable background-free and multiplexed detection in deep tissues. So far, however, in vitro and in vivo applications of UCNPs are restricted to the laboratory use due to safety concerns. Possible harmful effects may originate from the chemical composition but also from the small size of UCNPs. Potential end users must rely on well-founded safety data. Thus, a risk to benefit assessment of the envisioned combined therapeutic and diagnostic ("theranostic") applications is fundamentally important to bridge the translational gap between laboratory and clinics. The COST Action CM1403 "The European Upconversion Network-From the Design of Photon-Upconverting Nanomaterials to Biomedical Applications" integrates research on UCNPs ranging from fundamental materials synthesis and research, detection instrumentation, biofunctionalization, and bioassay development to toxicity testing. Such an interdisciplinary approach is necessary for a better and safer theranostic use of UCNPs. Here, the status of nanotoxicity research on UCNPs is compared to other nanomaterials, and routes for the translation of UCNPs into clinical applications are delineated.
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Affiliation(s)
- Helena Oliveira
- Department of BiologyCESAM‐Centre for Environmental and Marine StudiesCICECO‐Aveiro Institute of MaterialsUniversity of Aveiro 3810‐193 Aveiro Portugal
| | - Artur Bednarkiewicz
- Institute of Low Temperature and Structure ResearchPolish Academy of Sciences ul.Okolna 2 50422 Wroclaw Poland
- PORT Sp. z o.o. Stablowicka 147 Str. 54‐066 Wroclaw Poland
| | - Andreas Falk
- BioNanoNet Forschungsgesellschaft mbH Steyrergasse 17 8010 Graz Austria
| | - Eleonore Fröhlich
- Center for Medical ResearchMedical University of Graz Stiftingtalstrasse 24 8010 Graz Austria
| | - Darja Lisjak
- Department for Materials SynthesisJožef Stefan Institute Jamova 39 1000 Ljubljana Slovenia
| | - Adriele Prina‐Mello
- LBCAM and Nanomedicine LaboratoryTrinity Translational Medicine InstituteTrinity College Dublin Dublin 8 Republic of Ireland
| | - Susanne Resch
- BioNanoNet Forschungsgesellschaft mbH Steyrergasse 17 8010 Graz Austria
| | - Christa Schimpel
- BioNanoNet Forschungsgesellschaft mbH Steyrergasse 17 8010 Graz Austria
| | - Ivana Vinković Vrček
- Institute for Medical Research and Occupational Health Ksaverska cesta 2 10000 Zagreb Croatia
| | - Edyta Wysokińska
- Hirszfeld Institute of Immunology and Experimental TherapyPolish Academy of Sciences Wrocław Poland
| | - Hans H. Gorris
- Institute of Analytical ChemistryChemo‐ and BiosensorsUniversity of Regensburg 93040 Regensburg Germany
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21
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Silica nanoparticles induce conformational changes of tau protein and oxidative stress and apoptosis in neuroblastoma cell line. Int J Biol Macromol 2018; 124:1312-1320. [PMID: 30248427 DOI: 10.1016/j.ijbiomac.2018.09.118] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 09/19/2018] [Accepted: 09/20/2018] [Indexed: 12/31/2022]
Abstract
The adverse effects of SiO2 NPs on the biological systems like nervous system have not been well explored. This study aimed to evaluate the toxicity of SiO2 NPs on the nervous system in vitro. Therefore, human tau protein and neuroblastoma cell line (SH-SY5Y) were used as targets. In this study we examined the side effects of SiO2 NPs on tau protein structure using several techniques including CD, ANS fluorescence, UV-vis (360 nm), Congo red absorbance, TEM, and molecular dynamic. Also, the cytotoxicity effects of SiO2 NPs against SH-SY5Y cell line were evaluated using MTT, ROS and apoptotic assays. Spectroscopic and molecular dynamic investigations indicated that natively unfolded structure of tau in the presence of SiO2 NPs experienced a partially folded and amorphous aggregated structure. Cellular assay demonstrated that SiO2 NPs exerted cytotoxic effect on SH-SY5Y cells through ROS accumulation and induction of apoptosis. Overall, these findings proved that SiO2 NPs could induce adverse effects on tau structure and SH-SY5Y cell integrity. Moreover, further studies are required to elucidate the molecular mechanism of SiO2 NPs-induced side effects in vivo.
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22
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Coty JB, Varenne F, Benmalek A, Garsaa O, Le Potier I, Taverna M, Smadja C, Vauthier C. Characterization of nanomedicines’ surface coverage using molecular probes and capillary electrophoresis. Eur J Pharm Biopharm 2018; 130:48-58. [DOI: 10.1016/j.ejpb.2018.06.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 06/12/2018] [Accepted: 06/12/2018] [Indexed: 11/17/2022]
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23
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Morsbach S, Gonella G, Mailänder V, Wegner S, Wu S, Weidner T, Berger R, Koynov K, Vollmer D, Encinas N, Kuan SL, Bereau T, Kremer K, Weil T, Bonn M, Butt HJ, Landfester K. Engineering von Proteinen an Oberflächen: Von komplementärer Charakterisierung zu Materialoberflächen mit maßgeschneiderten Funktionen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712448] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Svenja Morsbach
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Grazia Gonella
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Volker Mailänder
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
- Abteilung für Dermatologie; Universitätsmedizin der Johannes Gutenberg-Universität Mainz; Langenbeckstraße 1 55131 Mainz Deutschland
| | - Seraphine Wegner
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Si Wu
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Tobias Weidner
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
- Abteilung für Chemie; Universität Aarhus; Langelandsgade 140 8000 Aarhus C Dänemark
| | - Rüdiger Berger
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Kaloian Koynov
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Doris Vollmer
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Noemí Encinas
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Seah Ling Kuan
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Tristan Bereau
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Kurt Kremer
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Tanja Weil
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Mischa Bonn
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Hans-Jürgen Butt
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Katharina Landfester
- Max Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
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24
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Morsbach S, Gonella G, Mailänder V, Wegner S, Wu S, Weidner T, Berger R, Koynov K, Vollmer D, Encinas N, Kuan SL, Bereau T, Kremer K, Weil T, Bonn M, Butt HJ, Landfester K. Engineering Proteins at Interfaces: From Complementary Characterization to Material Surfaces with Designed Functions. Angew Chem Int Ed Engl 2018; 57:12626-12648. [PMID: 29663610 PMCID: PMC6391961 DOI: 10.1002/anie.201712448] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 03/13/2018] [Indexed: 01/17/2023]
Abstract
Once materials come into contact with a biological fluid containing proteins, proteins are generally—whether desired or not—attracted by the material's surface and adsorb onto it. The aim of this Review is to give an overview of the most commonly used characterization methods employed to gain a better understanding of the adsorption processes on either planar or curved surfaces. We continue to illustrate the benefit of combining different methods to different surface geometries of the material. The thus obtained insight ideally paves the way for engineering functional materials that interact with proteins in a predetermined manner.
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Affiliation(s)
- Svenja Morsbach
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Grazia Gonella
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Volker Mailänder
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.,Department of Dermatology, University Medical Center Johannes Gutenberg-University Mainz, Langenbeckstraße 1, 55131, Mainz, Germany
| | - Seraphine Wegner
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Si Wu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Tobias Weidner
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.,Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Rüdiger Berger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Doris Vollmer
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Noemí Encinas
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Seah Ling Kuan
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Tristan Bereau
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Kurt Kremer
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Tanja Weil
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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25
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Rascol E, Pisani C, Dorandeu C, Nyalosaso JL, Charnay C, Daurat M, Da Silva A, Devoisselle JM, Gaillard JC, Armengaud J, Prat O, Maynadier M, Gary-Bobo M, Garcia M, Chopineau J, Guari Y. Biosafety of Mesoporous Silica Nanoparticles. Biomimetics (Basel) 2018; 3:E22. [PMID: 31105244 PMCID: PMC6352691 DOI: 10.3390/biomimetics3030022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/01/2018] [Accepted: 08/02/2018] [Indexed: 12/25/2022] Open
Abstract
Careful analysis of any new nanomedicine device or disposal should be undertaken to comprehensively characterize the new product before application, so that any unintended side effect is minimized. Because of the increasing number of nanotechnology-based drugs, we can anticipate that regulatory authorities might adapt the approval process for nanomedicine products due to safety concerns, e.g., request a more rigorous testing of the potential toxicity of nanoparticles (NPs). Currently, the use of mesoporous silica nanoparticles (MSN) as drug delivery systems is challenged by a lack of data on the toxicological profile of coated or non-coated MSN. In this context, we have carried out an extensive study documenting the influence of different functionalized MSN on the cellular internalization and in vivo behaviour. In this article, a synthesis of these works is reviewed and the perspectives are drawn. The use of magnetic MSN (Fe3O4@MSN) allows an efficient separation of coated NPs from cell cultures with a simple magnet, leading to results regarding corona formation without experimental bias. Our interest is focused on the mechanism of interaction with model membranes, the adsorption of proteins in biological fluids, the quantification of uptake, and the effect of such NPs on the transcriptomic profile of hepatic cells that are known to be readily concerned by NPs' uptake in vivo, especially in the case of an intravenous injection.
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Affiliation(s)
- Estelle Rascol
- Institute of Chemistry and Biology of Membranes and Nano-objects (CBMN) UMR-5248, CNRS, University of Bordeaux, INP, Allée Geoffroy St Hilaire, 33600 Pessac, France.
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
| | - Cédric Pisani
- The French Alternative Energies and Atomic Energy Commission (CEA), Biosciences and Biotechnologies Institute (BIAM), 30200 Bagnols-sur-Cèze, France.
| | - Christophe Dorandeu
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
| | - Jeff L Nyalosaso
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
| | - Clarence Charnay
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
| | - Morgane Daurat
- NanoMedSyn, 15 Avenue Charles Flahault, 34090 Montpellier, France.
| | - Afitz Da Silva
- NanoMedSyn, 15 Avenue Charles Flahault, 34090 Montpellier, France.
| | - Jean-Marie Devoisselle
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
| | - Jean-Charles Gaillard
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, 30207 Bagnols-sur-Cèze, France.
| | - Jean Armengaud
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic (Li2D), Service de Pharmacologie et Immunoanalyse (SPI), CEA, INRA, 30207 Bagnols-sur-Cèze, France.
| | - Odette Prat
- The French Alternative Energies and Atomic Energy Commission (CEA), Biosciences and Biotechnologies Institute (BIAM), 30200 Bagnols-sur-Cèze, France.
| | - Marie Maynadier
- NanoMedSyn, 15 Avenue Charles Flahault, 34090 Montpellier, France.
| | - Magali Gary-Bobo
- Max Mousseron Biomolecule Institute of Montpellier (IBMM), 15 Avenue Charles Flahault, 34090 Montpellier, France.
| | - Marcel Garcia
- NanoMedSyn, 15 Avenue Charles Flahault, 34090 Montpellier, France.
| | - Joël Chopineau
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
| | - Yannick Guari
- Institute Charles Gerhardt of Montpellier (ICGM), Place E. Bataillon, 34095 Montpellier, France.
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26
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Weber C, Simon J, Mailänder V, Morsbach S, Landfester K. Preservation of the soft protein corona in distinct flow allows identification of weakly bound proteins. Acta Biomater 2018; 76:217-224. [PMID: 29885856 DOI: 10.1016/j.actbio.2018.05.057] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 04/25/2018] [Accepted: 05/31/2018] [Indexed: 12/22/2022]
Abstract
Nanocarriers that are used for targeted drug delivery come in contact with biological liquids and subsequently proteins will adsorb to the nanocarriers' surface to form the so called 'protein corona'. The protein corona defines the biological identity and determines the biological response towards the nanocarriers in the body. To make nanomedicine safe and reliable it is required to get a better insight into this protein corona and, therefore, the adsorbed proteins have to be characterized. Currently, centrifugation is the common method to isolate the protein corona for further investigations. However, with this method it is only possible to investigate the strongly bound proteins, also referred to as 'hard protein corona'. Therefore, we want to introduce a new separation technique to separate nanoparticles including the soft protein corona containing also loosely bound proteins for further characterization. The used separation technique is the asymmetric flow field-flow fractionation (AF4). We were able to separate the nanoparticles with proteins forming the soft protein corona and were able to show that in our system only the hard protein corona directly influenced the cell uptake behavior. STATEMENT OF SIGNIFICANCE Currently, there is an ongoing debate whether only strongly bound proteins (hard corona) or also loosely bound proteins (soft corona) contribute to the biological identity of nanocarriers, because up to now isolation of the soft corona was not possible. Here, asymmetric flow field-flow fractionation was used to isolate nanoparticles with a preserved soft corona from the biological medium. This enabled the characterization of the soft corona composition and to evaluate its influence on cellular uptake. For our system we found that only the strongly bound proteins (hard corona) determined cell internalization. This method can now be used to evaluate the impact of the soft corona further and to characterize nanomaterials that cannot be separated from blood plasma by other means.
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