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Sewar Y, Amran M, Avudaiappan S, Gamil Y, Rashid RS. Bonding strength performance of bamboo-based composite materials: An in-depth insight for sustainable construction applications. Heliyon 2024; 10:e32155. [PMID: 39035520 PMCID: PMC11259787 DOI: 10.1016/j.heliyon.2024.e32155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 05/24/2024] [Accepted: 05/29/2024] [Indexed: 07/23/2024] Open
Abstract
This review systematically examines the multitude of factors influencing bonding strength in bamboo-based composite materials, given the rising prominence of bamboo as a green building material. With bamboo's inherent variability in mechanical properties and structure, engineered bamboo products have emerged to address challenges related to connections and joints. Such advancements have necessitated a detailed exploration of adhesive systems, a significant cost determinant in bamboo production. The adhesive bonding mechanism in bamboo, akin to wood, involves intricate processes including adhesive spreading, penetration, and solidification, influenced by the unique chemical composition of bamboo. The interfacial bond quality plays a pivotal role in determining the durability and performance of the final products, with numerous factors such as bamboo species, layered structure, adhesive type, and treatment types impacting the mechanical properties. Particular attention is given to the disparities in physical and mechanical properties between the bamboo culm's core and shell layers, attributing complexities to the gluing process. Examining shear failure strength reveals its criticality in mechanical investigations, with variations in bonding strength affecting the outcome. The review underscores the need for consistent quality control and adept manipulation of these influential factors for the successful manufacture of bamboo-based products. A comprehensive discussion ensues on the variables controlling the bonding properties of the developed bamboo products, aiming to evaluate and highlight the optimal parameters and procedures essential for enhancing the quality and reliability of bamboo-based composite materials for sustainable construction applications.
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Affiliation(s)
- Yousef Sewar
- Civil Engineering Department, Faculty of Engineering, Thamar University, 9676, Thamar, Yemen
| | - Mugahed Amran
- Department of Civil Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, 11942, Alkharj, Saudi Arabia
- Department of Civil Engineering, Faculty of Engineering and IT, Amran University, 9677, Amran, Yemen
| | - Siva Avudaiappan
- Departamento de Ciencias de la Construcción, Facultad de Ciencias de la Construcción y Ordenamiento Territorial Universidad Tecnológica Metropolitana, Santiago, Chile
| | - Yaser Gamil
- Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Sweden
- Department of Civil Eng., School of Eng., Monash University Malaysia, Jalan Lagoon Selatan, 47500, Sunway, Selangor, Malaysia
| | - Raizal S.M. Rashid
- Department of Civil Engineering, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
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2
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Grover K, Koblova A, Pezacki AT, Chang CJ, New EJ. Small-Molecule Fluorescent Probes for Binding- and Activity-Based Sensing of Redox-Active Biological Metals. Chem Rev 2024; 124:5846-5929. [PMID: 38657175 DOI: 10.1021/acs.chemrev.3c00819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Although transition metals constitute less than 0.1% of the total mass within a human body, they have a substantial impact on fundamental biological processes across all kingdoms of life. Indeed, these nutrients play crucial roles in the physiological functions of enzymes, with the redox properties of many of these metals being essential to their activity. At the same time, imbalances in transition metal pools can be detrimental to health. Modern analytical techniques are helping to illuminate the workings of metal homeostasis at a molecular and atomic level, their spatial localization in real time, and the implications of metal dysregulation in disease pathogenesis. Fluorescence microscopy has proven to be one of the most promising non-invasive methods for studying metal pools in biological samples. The accuracy and sensitivity of bioimaging experiments are predominantly determined by the fluorescent metal-responsive sensor, highlighting the importance of rational probe design for such measurements. This review covers activity- and binding-based fluorescent metal sensors that have been applied to cellular studies. We focus on the essential redox-active metals: iron, copper, manganese, cobalt, chromium, and nickel. We aim to encourage further targeted efforts in developing innovative approaches to understanding the biological chemistry of redox-active metals.
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Affiliation(s)
- Karandeep Grover
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Alla Koblova
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Aidan T Pezacki
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Christopher J Chang
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California 94720, United States
| | - Elizabeth J New
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Nano Institute, The University of Sydney, Sydney, New South Wales 2006, Australia
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3
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Lin Z, Zhang X, Nandi P, Lin Y, Wang L, Chu YS, Paape T, Yang Y, Xiao X, Liu Q. Correlative single-cell hard X-ray computed tomography and X-ray fluorescence imaging. Commun Biol 2024; 7:280. [PMID: 38448784 PMCID: PMC10917812 DOI: 10.1038/s42003-024-05950-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 02/21/2024] [Indexed: 03/08/2024] Open
Abstract
X-ray computed tomography (XCT) and X-ray fluorescence (XRF) imaging are two non-invasive imaging techniques to study cellular structures and chemical element distributions, respectively. However, correlative X-ray computed tomography and fluorescence imaging for the same cell have yet to be routinely realized due to challenges in sample preparation and X-ray radiation damage. Here we report an integrated experimental and computational workflow for achieving correlative multi-modality X-ray imaging of a single cell. The method consists of the preparation of radiation-resistant single-cell samples using live-cell imaging-assisted chemical fixation and freeze-drying procedures, targeting and labeling cells for correlative XCT and XRF measurement, and computational reconstruction of the correlative and multi-modality images. With XCT, cellular structures including the overall structure and intracellular organelles are visualized, while XRF imaging reveals the distribution of multiple chemical elements within the same cell. Our correlative method demonstrates the feasibility and broad applicability of using X-rays to understand cellular structures and the roles of chemical elements and related proteins in signaling and other biological processes.
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Affiliation(s)
- Zihan Lin
- Biology Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Xiao Zhang
- Biology Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Purbasha Nandi
- Biology Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yuewei Lin
- Computational Science Initiative, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Liguo Wang
- Laboratory for BioMolecular Structure, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yong S Chu
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Timothy Paape
- Biology Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
- U.S. Department of Agriculture's Agricultural Research Service at Children's Nutrition Research Center, Houston, TX, 77030, USA
| | - Yang Yang
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA.
| | - Xianghui Xiao
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA.
| | - Qun Liu
- Biology Department, Brookhaven National Laboratory, Upton, NY, 11973, USA.
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA.
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4
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Janovszky P, Kéri A, Palásti DJ, Brunnbauer L, Domoki F, Limbeck A, Galbács G. Quantitative elemental mapping of biological tissues by laser-induced breakdown spectroscopy using matrix recognition. Sci Rep 2023; 13:10089. [PMID: 37344545 DOI: 10.1038/s41598-023-37258-y] [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: 03/23/2023] [Accepted: 06/19/2023] [Indexed: 06/23/2023] Open
Abstract
The present study demonstrates the importance of converting signal intensity maps of organic tissues collected by laser-induced breakdown spectroscopy (LIBS) to elemental concentration maps and also proposes a methodology based on machine learning for its execution. The proposed methodology employs matrix-matched external calibration supported by a pixel-by-pixel automatic matrix (tissue type) recognition performed by linear discriminant analysis of the spatially resolved LIBS hyperspectral data set. On a swine (porcine) brain sample, we successfully performed this matrix recognition with an accuracy of 98% for the grey and white matter and we converted a LIBS intensity map of a tissue sample to a correct concentration map for the elements Na, K and Mg. Found concentrations in the grey and white matter agreed the element concentrations published in the literature and our reference measurements. Our results revealed that the actual concentration distribution in tissues can be quite different from what is suggested by the LIBS signal intensity map, therefore this conversion is always suggested to be performed if an accurate concentration distribution is to be assessed.
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Affiliation(s)
- Patrick Janovszky
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm square 7, Szeged, 6720, Hungary
| | - Albert Kéri
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm square 7, Szeged, 6720, Hungary
| | - Dávid J Palásti
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm square 7, Szeged, 6720, Hungary
| | - Lukas Brunnbauer
- Institute of Chemical Technologies and Analytics, TU Wien, Getreidemarkt 9/164, 1060, Vienna, Austria
| | - Ferenc Domoki
- Department of Physiology, University of Szeged, Dóm square 10, Szeged, 6720, Hungary
| | - Andreas Limbeck
- Institute of Chemical Technologies and Analytics, TU Wien, Getreidemarkt 9/164, 1060, Vienna, Austria
| | - Gábor Galbács
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm square 7, Szeged, 6720, Hungary.
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Bencharski C, Soria EA, Falchini GE, Pasqualini ME, Perez RD. Study of anti-tumorigenic actions of essential fatty acids in a murine mammary gland adenocarcinoma by micro-XRF. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:2044-2051. [PMID: 37073557 DOI: 10.1039/d2ay02094g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In the present work, a statistical experiment based on the microscopy X-ray fluorescence technique was developed to evaluate the effect of diets rich in ω-3 and ω-6 polyunsaturated fatty acids on tumour tissues. Relative variations on the local content of P, S, Ca, Fe, Cu and Zn were analysed in the experiment. Neoplastic tissues were obtained from mammary gland adenocarcinomas inoculated in mice belonging to three different dietary groups: normal, rich in ω-3 and in ω-6 polyunsaturated fatty acids. Slices of 30 microns thick sections of these samples were scanned in the air atmosphere in areas of 5 mm × 5 mm with a spatial resolution of 50 microns using synchrotron radiation. Principal component analysis was employed to analyse the correlation between the X-ray fluorescence signals of P, S, Ca, Fe, Cu and Zn. The subsequent application of the K-means clustering was used for the automatic segmentation of the image scans. By comparison with conventional histological analysis, the clusters were positively identified as tumour parenchyma, transition and necrotic region. The calculation of the mean content of P, S, Ca, Fe, Cu, and Zn in these regions showed that dietary polyunsaturated fatty acids modify elemental content of tumour parenchyma, suggesting its involvement in the antitumour effects of chia oil and protumour effects of safflower oil.
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Affiliation(s)
- C Bencharski
- IFEG (Physics Institute Enrique Gaviola), CONICET (National Research Council Scientific and Technical), Córdoba, Argentina.
| | - Elio A Soria
- National University of Córdoba, Córdoba, Argentina
| | | | | | - Roberto Daniel Perez
- IFEG (Physics Institute Enrique Gaviola), CONICET (National Research Council Scientific and Technical), Córdoba, Argentina.
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6
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Vatamaniuk MZ, Huang R, Zhao Z, Lei XG. SXRF for Studying the Distribution of Trace Metals in the Pancreas and Liver. Antioxidants (Basel) 2023; 12:antiox12040846. [PMID: 37107221 PMCID: PMC10135242 DOI: 10.3390/antiox12040846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/05/2023] Open
Abstract
Transition metals such as iron, copper and zinc are required for the normal functioning of biological tissues, whereas others, such as cadmium, are potentially highly toxic. Any disturbances in homeostasis caused by lack of micronutrients in the diet, pollution or genetic heredity result in malfunction and/or diseases. Here, we used synchrotron X-ray fluorescence, SXRF, microscopy and mice with altered functions of major antioxidant enzymes to show that SXRF may become a powerful tool to study biologically relevant metal balance in the pancreas and liver of mice models with disturbed glucose homeostasis.
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Affiliation(s)
| | - Rong Huang
- Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14850, USA
| | - Zeping Zhao
- Animal Science Department, Cornell University, Ithaca, NY 14853, USA
| | - Xin Gen Lei
- Animal Science Department, Cornell University, Ithaca, NY 14853, USA
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7
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Pascolo L, Pachetti M, Camillo A, Cernogoraz A, Rizzardi C, Mikus KV, Zanconati F, Salomé M, Suárez VT, Romano F, Zito G, Gianoncelli A, Ricci G. Detention and mapping of iron and toxic environmental elements in human ovarian endometriosis: A suggested combined role. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 864:161028. [PMID: 36549535 DOI: 10.1016/j.scitotenv.2022.161028] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Endometriosis is a disease affecting 10-15 % of women worldwide, consisting in the ectopic growth of endometrial cells outside the uterine cavity. Whist the pathogenetic mechanisms of endometriosis remain elusive and contemplating even environmental causes, iron deposits are common in endometrial lesions, indicating an altered iron metabolism at this level. This study was undertaken to reveal a possible relationship between iron dysmetabolism and accumulation of environmental metals. METHODS By combining histological and histochemical analysis (H&E and Perl's staining) with μ- and nano- synchrotron-based (SR-based) X-ray Fluorescence (XRF) microscopy, we investigated the distribution of iron and other elements in the ovarian endometriomas of 12 endometriosis patients and in 7 healthy endometrium samples. RESULTS XRF microscopy expanded the findings obtained by Perl's staining, revealing with an exceptional sensitivity intracellular features of iron accumulation in the epithelial endometrium, stroma and macrophages of the endometriotic lesions. XRF evidenced that iron was specifically accumulated in multiple micro aggregates, reaching concentrations up to 10-20 % p/p. Moreover, by XRF analysis we revealed for the first time the retention of a number of exogenous and potentially toxic metals such as Pb, Br, Ti, Al Cr, Si and Rb partially or totally co-localizing with iron. CONCLUSION μXRF reveals accumulation and colocalization of iron and environmental metals in human ovarian endometriosis, suggesting a role in the pathogenesis of endometriosis.
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Affiliation(s)
- Lorella Pascolo
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, 34137 Trieste, Italy.
| | - Maria Pachetti
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, 34137 Trieste, Italy
| | - Anna Camillo
- Department of Obstetrics and Gynecology, AOUI Verona, Piazzale A. Stefani 1, 37126 Verona, Italy
| | - Alice Cernogoraz
- Department of Gynecology and Obstetrics, F. Del Ponte Hospital, University of Insubria, Varese, Italy
| | - Clara Rizzardi
- Department of Medical, Surgical, and Health Sciences, University of Trieste, 34149 Trieste, Italy
| | - Katarina Vogel Mikus
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia; Slovenia Biotechnical Faculty, University of Ljubljana, 1000 Ljubljana, Slovenia
| | - Fabrizio Zanconati
- Department of Medical, Surgical, and Health Sciences, University of Trieste, 34149 Trieste, Italy
| | - Murielle Salomé
- ESRF, The European Synchrotron, 38043 Grenoble Cedex 9, France
| | | | - Federico Romano
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, 34137 Trieste, Italy
| | - Gabriella Zito
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, 34137 Trieste, Italy
| | - Alessandra Gianoncelli
- Elettra, Sincrotrone Trieste, Strada Statale 14 - km 163,5 in AREA Science Park, Trieste, Italy
| | - Giuseppe Ricci
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, 34137 Trieste, Italy; Department of Medical, Surgical, and Health Sciences, University of Trieste, 34149 Trieste, Italy
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8
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Merolle L, Pascolo L, Zupin L, Parisse P, Bonanni V, Gariani G, Kenig S, Bedolla DE, Crovella S, Ricci G, Iotti S, Malucelli E, Kourousias G, Gianoncelli A. Impact of Sample Preparation Methods on Single-Cell X-ray Microscopy and Light Elemental Analysis Evaluated by Combined Low Energy X-ray Fluorescence, STXM and AFM. Molecules 2023; 28:molecules28041992. [PMID: 36838979 PMCID: PMC9962160 DOI: 10.3390/molecules28041992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/08/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023] Open
Abstract
BACKGROUND Although X-ray fluorescence microscopy is becoming a widely used technique for single-cell analysis, sample preparation for this microscopy remains one of the main challenges in obtaining optimal conditions for the measurements in the X-ray regime. The information available to researchers on sample treatment is inadequate and unclear, sometimes leading to wasted time and jeopardizing the experiment's success. Many cell fixation methods have been described, but none of them have been systematically tested and declared the most suitable for synchrotron X-ray microscopy. METHODS The HEC-1-A endometrial cells, human spermatozoa, and human embryonic kidney (HEK-293) cells were fixed with organic solvents and cross-linking methods: 70% ethanol, 3.7%, and 2% paraformaldehyde; in addition, HEK-293 cells were subjected to methanol/ C3H6O treatment and cryofixation. Fixation methods were compared by coupling low-energy X-ray fluorescence with scanning transmission X-ray microscopy and atomic force microscopy. RESULTS Organic solvents lead to greater dehydration of cells, which has the most significant effect on the distribution and depletion of diffusion elements. Paraformaldehyde provides robust and reproducible data. Finally, the cryofixed cells provide the best morphology and element content results. CONCLUSION Although cryofixation seems to be the most appropriate method as it allows for keeping cells closer to physiological conditions, it has some technical limitations. Paraformaldehyde, when used at the average concentration of 3.7%, is also an excellent alternative for X-ray microscopy.
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Affiliation(s)
- Lucia Merolle
- AUSL-IRCCS di Reggio Emilia, Transfusion Medicine Unit, 42123 Reggio Emilia, Italy
| | - Lorella Pascolo
- IRCCS Burlo Garofolo, Institute for Maternal and Child Health, 34137 Trieste, Italy
| | - Luisa Zupin
- IRCCS Burlo Garofolo, Institute for Maternal and Child Health, 34137 Trieste, Italy
| | - Pietro Parisse
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, 34149 Trieste, Italy
- Elettra—Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - Valentina Bonanni
- Elettra—Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - Gianluca Gariani
- Elettra—Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - Sasa Kenig
- Faculty of Health Sciences, University of Primorska, Polje 42, 6310 Izola, Slovenia
| | - Diana E. Bedolla
- Elettra—Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Area Science Park, Padriciano 99, 34149 Trieste, Italy
| | - Sergio Crovella
- Biological Science Program, Department of Biological and Environmental Science, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
| | - Giuseppe Ricci
- IRCCS Burlo Garofolo, Institute for Maternal and Child Health, 34137 Trieste, Italy
- Department of Medical, Surgical, and Health Sciences, University of Trieste, 34149 Trieste, Italy
| | - Stefano Iotti
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy
- National Institute of Biostructures and Biosystems, 00136 Rome, Italy
| | - Emil Malucelli
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy
| | - George Kourousias
- Elettra—Sincrotrone Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
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9
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Costa C, De Jesus J, Nikula C, Murta T, Grime GW, Palitsin V, Dartois V, Firat K, Webb R, Bunch J, Bailey MJ. A Multimodal Desorption Electrospray Ionisation Workflow Enabling Visualisation of Lipids and Biologically Relevant Elements in a Single Tissue Section. Metabolites 2023; 13:metabo13020262. [PMID: 36837881 PMCID: PMC9964958 DOI: 10.3390/metabo13020262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023] Open
Abstract
The colocation of elemental species with host biomolecules such as lipids and metabolites may shed new light on the dysregulation of metabolic pathways and how these affect disease pathogeneses. Alkali metals have been the subject of extensive research, are implicated in various neurodegenerative and infectious diseases and are known to disrupt lipid metabolism. Desorption electrospray ionisation (DESI) is a widely used approach for molecular imaging, but previous work has shown that DESI delocalises ions such as potassium (K) and chlorine (Cl), precluding the subsequent elemental analysis of the same section of tissue. The solvent typically used for the DESI electrospray is a combination of methanol and water. Here we show that a novel solvent system, (50:50 (%v/v) MeOH:EtOH) does not delocalise elemental species and thus enables elemental mapping to be performed on the same tissue section post-DESI. Benchmarking the MeOH:EtOH electrospray solvent against the widely used MeOH:H2O electrospray solvent revealed that the MeOH:EtOH solvent yielded increased signal-to-noise ratios for selected lipids. The developed multimodal imaging workflow was applied to a lung tissue section containing a tuberculosis granuloma, showcasing its applicability to elementally rich samples displaying defined structural information.
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Affiliation(s)
- Catia Costa
- University of Surrey Ion Beam Centre, Guildford GU2 7XH, UK
| | - Janella De Jesus
- Department of Chemistry, University of Surrey, Guildford GU2 7XH, UK
- The National Physical Laboratory, Teddington TW11 0LW, UK
| | - Chelsea Nikula
- The National Physical Laboratory, Teddington TW11 0LW, UK
| | - Teresa Murta
- The National Physical Laboratory, Teddington TW11 0LW, UK
| | | | | | - Véronique Dartois
- Center for Discovery and Innovation, Hackensack Meridian School of Medicine, Nutley, NJ 07110, USA
| | - Kaya Firat
- Center for Discovery and Innovation, Hackensack Meridian School of Medicine, Nutley, NJ 07110, USA
| | - Roger Webb
- University of Surrey Ion Beam Centre, Guildford GU2 7XH, UK
| | | | - Melanie J. Bailey
- University of Surrey Ion Beam Centre, Guildford GU2 7XH, UK
- Department of Chemistry, University of Surrey, Guildford GU2 7XH, UK
- Correspondence: ; Tel.: +44-(0)1483682593
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10
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Han B, Sun D, Wan W, Dong C, Li D, Zhao L, Wang H. Correlation among Composition, Microstructure and Hardness of 7xxx Aluminum Alloy Using Original Statistical Spatial-Mapping Method. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5767. [PMID: 36013903 PMCID: PMC9413701 DOI: 10.3390/ma15165767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/31/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
The quantitative study of the relationship between material composition, microstructure and properties is of great importance for the improvement in material properties. In this study, the continuous data of elemental composition, recrystallization, hardness and undissolved phase distribution of the same sample in the range of 60 to 150 square millimeters were obtained by high-throughput testing instrument. The distribution characteristics and rules of a single data set were analyzed. In addition, each data set was divided into micro-areas according to the corresponding relationship of location, and the mapping between multi-source heterogeneous micro-area data sets was established to analyze and quantify the correlation between material composition, structure and hardness. The conclusions are as follows: (1) the average size of the insoluble phase in the middle of the two materials is larger than that of the surface, but due to the existence of central segregation, the average area of the T4 insoluble phase showed an abnormal decrease; (2) there was positive micro-segregation of Al, Cr, Ti, and Zr elements, and negative micro-segregation of Zn, Cu, and Fe elements in the recrystallized grains of the T5 middle segregation zone; (3) the growth process of the insoluble phase was synchronous with the recrystallization proportion and the size of the recrystallized grains; (4) the composition segregation and recrystallized coarse grains were the main reasons for the formation of low hardness zone in T4 and T5 materials, respectively.
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Affiliation(s)
- Bing Han
- Qingdao NCS Testing & Corrosion Protection Technology Co., Ltd., Qingdao 266071, China
- Beijing Key Laboratory of Metal Materials Characterization, Central Iron & Steel Research Institute, Beijing 100081, China
| | - Dandan Sun
- Qingdao NCS Testing & Corrosion Protection Technology Co., Ltd., Qingdao 266071, China
| | - Weihao Wan
- Beijing Key Laboratory of Metal Materials Characterization, Central Iron & Steel Research Institute, Beijing 100081, China
| | - Caichang Dong
- Qingdao NCS Testing & Corrosion Protection Technology Co., Ltd., Qingdao 266071, China
| | - Dongling Li
- Beijing Key Laboratory of Metal Materials Characterization, Central Iron & Steel Research Institute, Beijing 100081, China
| | - Lei Zhao
- Beijing Key Laboratory of Metal Materials Characterization, Central Iron & Steel Research Institute, Beijing 100081, China
| | - Haizhou Wang
- Beijing Key Laboratory of Metal Materials Characterization, Central Iron & Steel Research Institute, Beijing 100081, China
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11
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Zhang Q, Wei Z, Weng H, Chen Y, Zhang J, Mei S, Wei J, Zhu X, Nong Y, Ruan J, Liu W, Zhou R, Wang F, Xie Y, Huang J, Zhang X, Liu F. Folic Acid Preconditioning Alleviated Radiation-Induced Ovarian Dysfunction in Female Mice. Front Nutr 2022; 9:854655. [PMID: 35836584 PMCID: PMC9274203 DOI: 10.3389/fnut.2022.854655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 06/01/2022] [Indexed: 11/17/2022] Open
Abstract
Radiological therapy/examination is the primary source of artificial radiation exposure in humans. While its application has contributed to major advances in disease diagnosis and treatment, ionizing radiation exposure is associated with ovarian damage. The use of natural products, either alone or as an adjunct, has become increasingly common for reducing the side effects of radiological therapy during disease treatment. Herein, we explored the protective effect of folic acid (FA), a widely used B vitamin, against radiation-induced ovarian injury and its mechanism of action. Female mice with normal ovarian function were randomly divided into control, FA, radiation, and radiation + FA groups. The intervention strategy included daily intragastric administration of FA (5 mg/kg) for 3 weeks prior to radiation exposure. Mice in the radiation and radiation + FA groups received a single dose of 5 Gy X-ray irradiation. Changes in the estrous cycle were then recorded, and ovarian tissues were collected. Pathophysiological changes as well as reproductive and endocrine-related indexes were determined via H&E staining, immunohistochemistry, Western blot, and ELISA. The reproductive performance and emotional symptoms of animals were also monitored. Our results indicated that FA intervention effectively alleviated ovarian damage, leading to more regular estrous cycles, lesser impairment of follicular morphology and endocrine status, as well as greater germ cell preservation. Reduced levels of oxidative stress, inflammation, and enhanced DNA repair were associated these changes. FA pre-administration improved the reproductive performance, leading to higher pregnancy rates and greater litter sizes. Further, the anxiety levels of animals were significantly reduced. Our results indicate that FA pre-administration significantly alleviates radiation-induced ovarian damage in rodents, highlighting its potential as a protective strategy against radiation exposure in the female population.
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Affiliation(s)
- Qianyu Zhang
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
- Jinan University, Guangzhou, China
| | - Zhifu Wei
- Department of Gynaecology, The Affiliated Shunde Hospital of Jinan University, Foshan, China
| | - Huinan Weng
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Ye Chen
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Jie Zhang
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Shiwei Mei
- Department of Radiation, Guangdong Women and Children Hospital, Guangzhou, China
| | - Jiahui Wei
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Xiulan Zhu
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Yingqi Nong
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Jianxing Ruan
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Wenjuan Liu
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Ruiqiong Zhou
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Fang Wang
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Yanni Xie
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
| | - Junjiu Huang
- MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Junjiu Huang
| | - Xiqian Zhang
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
- Xiqian Zhang
| | - Fenghua Liu
- Department of Reproductive Health and Infertility, Guangdong Women and Children Hospital, Guangzhou, China
- *Correspondence: Fenghua Liu
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12
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Sala S, Zhang Y, De La Rosa N, Dreier T, Kahnt M, Langer M, Dahlin LB, Bech M, Villanueva-Perez P, Kalbfleisch S. Dose-efficient multimodal microscopy of human tissue at a hard X-ray nanoprobe beamline. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:807-815. [PMID: 35511013 PMCID: PMC9070709 DOI: 10.1107/s1600577522001874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
X-ray fluorescence microscopy performed at nanofocusing synchrotron beamlines produces quantitative elemental distribution maps at unprecedented resolution (down to a few tens of nanometres), at the expense of relatively long measuring times and high absorbed doses. In this work, a method was implemented in which fast low-dose in-line holography was used to produce quantitative electron density maps at the mesoscale prior to nanoscale X-ray fluorescence acquisition. These maps ensure more efficient fluorescence scans and the reduction of the total absorbed dose, often relevant for radiation-sensitive (e.g. biological) samples. This multimodal microscopy approach was demonstrated on human sural nerve tissue. The two imaging modes provide complementary information at a comparable resolution, ultimately limited by the focal spot size. The experimental setup presented allows the user to swap between them in a flexible and reproducible fashion, as well as to easily adapt the scanning parameters during an experiment to fine-tune resolution and field of view.
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Affiliation(s)
- Simone Sala
- MAX IV Laboratory, Lund University, 22100 Lund, Sweden
| | - Yuhe Zhang
- Division of Synchrotron Radiation Research and NanoLund, Department of Physics, Lund University, 22100 Lund, Sweden
| | - Nathaly De La Rosa
- Department of Medical Radiation Physics, Clinical Sciences Lund, Lund University, 22185 Lund, Sweden
| | - Till Dreier
- Department of Medical Radiation Physics, Clinical Sciences Lund, Lund University, 22185 Lund, Sweden
- Excillum AB, 16440 Kista, Sweden
| | - Maik Kahnt
- MAX IV Laboratory, Lund University, 22100 Lund, Sweden
| | - Max Langer
- Univ Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, U1206, 69621 Villeurbanne, France
| | - Lars B. Dahlin
- Department of Translational Medicine – Hand Surgery, Lund University, Malmö, Sweden
- Department of Hand Surgery, Skåne University Hospital, Malmö, Sweden
| | - Martin Bech
- Department of Medical Radiation Physics, Clinical Sciences Lund, Lund University, 22185 Lund, Sweden
| | - Pablo Villanueva-Perez
- Division of Synchrotron Radiation Research and NanoLund, Department of Physics, Lund University, 22100 Lund, Sweden
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13
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Musyoka Wayua D, Kalambuka Angeyo H, Dehayem-Kamadjeu A, Amiga Kaduki K. Direct Analysis of Blood for Diagnostic Metals for Malaria by Peak-Free Laser-Induced Breakdown Spectroscopy (LIBS) with Artificial Neural Networks (ANN) and Partial Least Squares (PLS). ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2067862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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14
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Ralbovsky NM, Zou L, Chen B, Zhang NR, Hines CDG, Vavrek M, Zhong W, Smith JP, Bu X. Simultaneous multielement imaging of liver tissue using laser ablation inductively coupled plasma mass spectrometry. Talanta 2021; 235:122725. [PMID: 34517593 DOI: 10.1016/j.talanta.2021.122725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/16/2021] [Accepted: 07/17/2021] [Indexed: 11/26/2022]
Abstract
Analysis of the spatial distribution of metals, metalloids, and non-metals in biological tissues is of significant interest in the life sciences, helping to illuminate the function and roles these elements play within various biological pathways. Chemical imaging methods are commonly employed to address biological questions and reveal individual spatial distributions of analytes of interest. Elucidation of these spatial distributions can help determine key elemental and molecular information within the respective biological specimens. However, traditionally utilized imaging methods prove challenging for certain biological tissue analysis, especially with respect to applications that require high spatial resolution or depth profiling. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has been shown to be effective for direct elemental analysis of solid materials with high levels of precision. In this work, chemical imaging using LA-ICP-MS has been applied as a powerful analytical methodology for the analysis of liver tissue samples. The proposed analytical methodology successfully produced both qualitative and quantitative information regarding specific elemental distributions within images of thin tissue sections with high levels of sensitivity and spatial resolution. The spatial resolution of the analytical methodology was innovatively enhanced, helping to broaden applicability of this technique to applications requiring significantly high spatial resolutions. This information can be used to further understand the role these elements play within biological systems and impacts dysregulation may have.
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Affiliation(s)
- Nicole M Ralbovsky
- Analytical Research & Development, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Lanfang Zou
- Analytical Research & Development, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Bingming Chen
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Nanyan Rena Zhang
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Catherine D G Hines
- Translational Imaging Biomarkers, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Marissa Vavrek
- Pharmacokinetics, Pharmacodynamics and Drug Metabolism, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Wendy Zhong
- Analytical Research & Development, MRL, Merck & Co., Inc., West Point, PA, 19486, USA
| | - Joseph P Smith
- Analytical Research & Development, MRL, Merck & Co., Inc., West Point, PA, 19486, USA.
| | - Xiaodong Bu
- Analytical Research & Development, MRL, Merck & Co., Inc., West Point, PA, 19486, USA.
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15
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Sbarato VM, Falchini GE, Sánchez HJ, Perez RD. Monitoring of metal phytofiltration performance by micro-XRF methodology. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:2701-2709. [PMID: 34037638 DOI: 10.1039/d1ay00360g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this work, micro-XRF was considered as a possible technique for monitoring the rate of incorporation of Cu and Zn into aquatic plants of a laboratory-scale phytofiltration system. This system employed Salvinia biloba Raddi under controlled conditions of light and nutrients. This aquatic plant is being considered as an efficient hyperaccumulator of Cu and Zn and is widely spread in South American lakes and rivers. One set of plants was exposed to 40 ppm w/w of Cu and another to 40 ppm w/w of Zn. The analytical procedure was based on the periodic in vivo quantitative analysis of Cu and Zn at selected points in the plants using micro-XRF. The accuracy of this quantification was effectively improved with the assistance of the Monte Carlo XMI-MSIM simulation code. In order to establish the input parameters of this software, careful measurements of the experimental parameters necessary for the correct modeling of the micro-XRF spectrometer were performed. After that, specially manufactured standards made of tissue equivalent material were employed to validate the configuration of the simulation code and input parameters. It was fulfilled by the comparison of measured and simulated micro-XRF spectra of these standards. Once the configuration code and input parameters were verified, two strategies were considered for the application of Monte Carlo simulation for elemental quantification in plants: an iterative process and inverse method established with external virtual standards. Benefits and drawbacks of both approaches to improve the monitoring of phytofiltration systems were carefully discussed.
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Affiliation(s)
- Viviana M Sbarato
- Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Córdoba, Argentina
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16
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Single-cell visualization and quantification of trace metals in Chlamydomonas lysosome-related organelles. Proc Natl Acad Sci U S A 2021; 118:2026811118. [PMID: 33879572 DOI: 10.1073/pnas.2026811118] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The acidocalcisome is an acidic organelle in the cytosol of eukaryotes, defined by its low pH and high calcium and polyphosphate content. It is visualized as an electron-dense object by transmission electron microscopy (TEM) or described with mass spectrometry (MS)-based imaging techniques or multimodal X-ray fluorescence microscopy (XFM) based on its unique elemental composition. Compared with MS-based imaging techniques, XFM offers the additional advantage of absolute quantification of trace metal content, since sectioning of the cell is not required and metabolic states can be preserved rapidly by either vitrification or chemical fixation. We employed XFM in Chlamydomonas reinhardtii to determine single-cell and organelle trace metal quotas within algal cells in situations of trace metal overaccumulation (Fe and Cu). We found up to 70% of the cellular Cu and 80% of Fe sequestered in acidocalcisomes in these conditions and identified two distinct populations of acidocalcisomes, defined by their unique trace elemental makeup. We utilized the vtc1 mutant, defective in polyphosphate synthesis and failing to accumulate Ca, to show that Fe sequestration is not dependent on either. Finally, quantitation of the Fe and Cu contents of individual cells and compartments via XFM, over a range of cellular metal quotas created by nutritional and genetic perturbations, indicated excellent correlation with bulk data from corresponding cell cultures, establishing a framework to distinguish the nutritional status of single cells.
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17
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X-ray Fluorescence Uptake Measurement of Functionalized Gold Nanoparticles in Tumor Cell Microsamples. Int J Mol Sci 2021; 22:ijms22073691. [PMID: 33916283 PMCID: PMC8037401 DOI: 10.3390/ijms22073691] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
Quantitative cellular in vitro nanoparticle uptake measurements are possible with a large number of different techniques, however, all have their respective restrictions. Here, we demonstrate the application of synchrotron-based X-ray fluorescence imaging (XFI) on prostate tumor cells, which have internalized differently functionalized gold nanoparticles. Total nanoparticle uptake on the order of a few hundred picograms could be conveniently observed with microsamples consisting of only a few hundreds of cells. A comparison with mass spectroscopy quantification is provided, experimental results are both supported and sensitivity limits of this XFI approach extrapolated by Monte-Carlo simulations, yielding a minimum detectable nanoparticle mass of just 5 pg. This study demonstrates the high sensitivity level of XFI, allowing non-destructive uptake measurements with very small microsamples within just seconds of irradiation time.
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18
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Hu Q, Antipova OA, O’Halloran TV, Wolfner MF. X-ray fluorescence microscopy scanning of Drosophila oocytes and eggs. STAR Protoc 2021; 2:100247. [PMID: 33437967 PMCID: PMC7786125 DOI: 10.1016/j.xpro.2020.100247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
X-ray fluorescence microscopy (XFM) is a powerful tool for mapping and quantifying the spatial distribution of elemental composition of biological samples. Recently, it was reported that transition metal fluctuations occur during Drosophila reproduction, analogous to what is seen in mammals and nematodes, and may contribute to Drosophila female fertility. To further support XFM studies on Drosophila reproduction, we describe procedures for isolating oocytes and activated eggs and examining their elemental composition by XFM scanning and analysis. For complete details on the use and execution of this protocol, please refer to Hu et al. (2020).
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Affiliation(s)
- Qinan Hu
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA
| | - Olga A. Antipova
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Thomas V. O’Halloran
- The Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Molecular Biosciences, Northwestern University, Evanston, IL 60208, USA
| | - Mariana F. Wolfner
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA
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19
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Falchini G, Malezan A, Poletti M, Soria E, Pasqualini M, Perez R. Analysis of phosphorous content in cancer tissue by synchrotron micro-XRF. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2020.109157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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20
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Bakkar N, Starr A, Rabichow BE, Lorenzini I, McEachin ZT, Kraft R, Chaung M, Macklin-Isquierdo S, Wingfield T, Carhart B, Zahler N, Chang WH, Bassell GJ, Betourne A, Boulis N, Alworth SV, Ichida JK, August PR, Zarnescu DC, Sattler R, Bowser R. The M1311V variant of ATP7A is associated with impaired trafficking and copper homeostasis in models of motor neuron disease. Neurobiol Dis 2020; 149:105228. [PMID: 33359139 DOI: 10.1016/j.nbd.2020.105228] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/04/2020] [Accepted: 12/17/2020] [Indexed: 02/08/2023] Open
Abstract
Disruption in copper homeostasis causes a number of cognitive and motor deficits. Wilson's disease and Menkes disease are neurodevelopmental disorders resulting from mutations in the copper transporters ATP7A and ATP7B, with ATP7A mutations also causing occipital horn syndrome, and distal motor neuropathy. A 65 year old male presenting with brachial amyotrophic diplegia and diagnosed with amyotrophic lateral sclerosis (ALS) was found to harbor a p.Met1311Val (M1311V) substitution variant in ATP7A. ALS is a fatal neurodegenerative disease associated with progressive muscle weakness, synaptic deficits and degeneration of upper and lower motor neurons. To investigate the potential contribution of the ATP7AM1311V variant to neurodegeneration, we obtained and characterized both patient-derived fibroblasts and patient-derived induced pluripotent stem cells differentiated into motor neurons (iPSC-MNs), and compared them to control cell lines. We found reduced localization of ATP7AM1311V to the trans-Golgi network (TGN) at basal copper levels in patient-derived fibroblasts and iPSC-MNs. In addition, redistribution of ATP7AM1311V out of the TGN in response to increased extracellular copper was defective in patient fibroblasts. This manifested in enhanced intracellular copper accumulation and reduced survival of ATP7AM1311V fibroblasts. iPSC-MNs harboring the ATP7AM1311V variant showed decreased dendritic complexity, aberrant spontaneous firing, and decreased survival. Finally, expression of the ATP7AM1311V variant in Drosophila motor neurons resulted in motor deficits. Apilimod, a drug that targets vesicular transport and recently shown to enhance survival of C9orf72-ALS/FTD iPSC-MNs, also increased survival of ATP7AM1311V iPSC-MNs and reduced motor deficits in Drosophila expressing ATP7AM1311V. Taken together, these observations suggest that ATP7AM1311V negatively impacts its role as a copper transporter and impairs several aspects of motor neuron function and morphology.
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Affiliation(s)
- Nadine Bakkar
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA
| | - Alexander Starr
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA
| | - Benjamin E Rabichow
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA
| | - Ileana Lorenzini
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA
| | - Zachary T McEachin
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Robert Kraft
- Departments of Molecular and Cellular Biology, Neuroscience, and Neurology, University of Arizona, Tucson, AZ 85721, USA
| | - Matthew Chaung
- Departments of Molecular and Cellular Biology, Neuroscience, and Neurology, University of Arizona, Tucson, AZ 85721, USA
| | - Sam Macklin-Isquierdo
- Departments of Molecular and Cellular Biology, Neuroscience, and Neurology, University of Arizona, Tucson, AZ 85721, USA
| | - Taylor Wingfield
- Departments of Molecular and Cellular Biology, Neuroscience, and Neurology, University of Arizona, Tucson, AZ 85721, USA
| | - Briggs Carhart
- Departments of Molecular and Cellular Biology, Neuroscience, and Neurology, University of Arizona, Tucson, AZ 85721, USA
| | | | | | - Gary J Bassell
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | - Nicholas Boulis
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA 30322, USA
| | | | | | | | - Daniela C Zarnescu
- Departments of Molecular and Cellular Biology, Neuroscience, and Neurology, University of Arizona, Tucson, AZ 85721, USA
| | - Rita Sattler
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA.
| | - Robert Bowser
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ 85013, USA.
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21
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Brister EY, Vasi Z, Antipova O, Robinson A, Tan X, Agarwal A, Stock SR, Carriero A, Richter CP. X-ray fluorescence microscopy: A method of measuring ion concentrations in the ear. Hear Res 2020; 391:107948. [PMID: 32283439 DOI: 10.1016/j.heares.2020.107948] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/18/2020] [Accepted: 03/05/2020] [Indexed: 12/31/2022]
Abstract
This technical note describes synchrotron x-ray fluorescence microscopy (XFM) as a method for measuring the concentrations of different elements in cross-sections of the ear at extremely high resolution. This method could be of great importance for addressing many open questions in hearing research. XFM uses synchrotron radiation to evoke emissions from many biologically relevant elements in the tissue. The intensity and wavelength of the emitted radiation provide a fingerprint of the tissue composition that can be used to measure the concentration of the elements in the sampled location. Here, we focus on energies that target biologically-relevant elements of the periodic table between magnesium and zinc. Since a highly focused x-ray beam is used, the spot size is well below 1 μm and the samples can be scanned at a nanometer lateral resolution. This study shows that measurement of the concentrations of different elements is possible in a mid-modiolar cross-section of a mouse cochlea. Images are presented that indicate potassium and chloride "hot spots" in the spiral ligament and the spiral limbus, providing experimental evidence for the potassium recycling pathway and showing the cochlear structures involved. Scans of a section obtained from the incus, one of the middle ear ossicles, in a developing mouse have shown that zinc is not uniformly distributed This supports the hypothesis that zinc plays a special role in the process of ossification. Although limited by sophisticated sample preparation and sectioning, the method provides ample exciting opportunities, to understand the role of genetics and epigenetics on hearing mechanisms in ontogeny and phylogeny.
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Affiliation(s)
- Eileen Y Brister
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Department of Speech and Hearing Sciences, Indiana University, Bloomington, IN, United States
| | - Zahra Vasi
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Illinois Mathematics and Science Academy, Aurora, IL, United States
| | - Olga Antipova
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois, United States
| | - Alan Robinson
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Xiaodong Tan
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Aditi Agarwal
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Stuart R Stock
- Department of Cell and Developmental Biology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Alessandra Carriero
- Department of Biomedical Engineering, The City College of New York, NY, United States
| | - Claus-Peter Richter
- Department of Otolaryngology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Department of Biomedical Engineering, Northwestern University, Evanston, IL, United States; The Hugh Knowles Center, Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, United States.
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22
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Hartnell D, Andrews W, Smith N, Jiang H, McAllum E, Rajan R, Colbourne F, Fitzgerald M, Lam V, Takechi R, Pushie MJ, Kelly ME, Hackett MJ. A Review of ex vivo Elemental Mapping Methods to Directly Image Changes in the Homeostasis of Diffusible Ions (Na +, K +, Mg 2 +, Ca 2 +, Cl -) Within Brain Tissue. Front Neurosci 2020; 13:1415. [PMID: 32038130 PMCID: PMC6987141 DOI: 10.3389/fnins.2019.01415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 12/16/2019] [Indexed: 12/11/2022] Open
Abstract
Diffusible ions (Na+, K+, Mg2+, Ca2+, Cl-) are vital for healthy function of all cells, especially brain cells. Unfortunately, the diffusible nature of these ions renders them difficult to study with traditional microscopy in situ within ex vivo brain tissue sections. This mini-review examines the recent progress in the field, using direct elemental mapping techniques to study ion homeostasis during normal brain physiology and pathophysiology, through measurement of ion distribution and concentration in ex vivo brain tissue sections. The mini-review examines the advantages and limitations of specific techniques: proton induced X-ray emission (PIXE), X-ray fluorescence microscopy (XFM), secondary ion mass spectrometry (SIMS), laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and the sample preparation requirements to study diffusible ions with these methods.
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Affiliation(s)
- David Hartnell
- School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, Perth, WA, Australia
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
- Curtin Institute for Functional Molecules and Interfaces, Curtin University, Perth, WA, Australia
| | - Wendy Andrews
- School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, Perth, WA, Australia
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
- Curtin Institute for Functional Molecules and Interfaces, Curtin University, Perth, WA, Australia
| | - Nicole Smith
- School of Molecular Sciences, Faculty of Science, University of Western Australia, Perth, WA, Australia
| | - Haibo Jiang
- School of Molecular Sciences, Faculty of Science, University of Western Australia, Perth, WA, Australia
| | - Erin McAllum
- Melbourne Dementia Research Centre, Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Ramesh Rajan
- Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Frederick Colbourne
- Department of Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AL, Canada
- Department of Psychology, Faculty of Arts, University of Alberta, Edmonton, AL, Canada
| | - Melinda Fitzgerald
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
- School of Biological Sciences, University of Western Australia, Perth, WA, Australia
- Perron Institute for Neurological and Translational Science, Perth, WA, Australia
| | - Virginie Lam
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, WA, Australia
| | - Ryusuke Takechi
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, WA, Australia
| | - M. Jake Pushie
- Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Michael E. Kelly
- Department of Surgery, College of Medicine, University of Saskatchewan, Saskatoon, SK, Canada
| | - Mark J. Hackett
- School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, Perth, WA, Australia
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA, Australia
- Curtin Institute for Functional Molecules and Interfaces, Curtin University, Perth, WA, Australia
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23
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Victor TW, O'Toole KH, Easthon LM, Ge M, Smith RJ, Huang X, Yan H, Chu YS, Chen S, Gursoy D, Ralle M, Imperiali B, Allen KN, Miller LM. Lanthanide-Binding Tags for 3D X-ray Imaging of Proteins in Cells at Nanoscale Resolution. J Am Chem Soc 2020; 142:2145-2149. [PMID: 31923358 DOI: 10.1021/jacs.9b11571] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We report the application of lanthanide-binding tags (LBTs) for two- and three-dimensional X-ray imaging of individual proteins in cells with a sub-15 nm beam. The method combines encoded LBTs, which are tags of minimal size (ca. 15-20 amino acids) affording high-affinity lanthanide ion binding, and X-ray fluorescence microscopy (XFM). This approach enables visualization of LBT-tagged proteins while simultaneously measuring the elemental distribution in cells at a spatial resolution necessary for visualizing cell membranes and eukaryotic subcellular organelles.
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Affiliation(s)
- Tiffany W Victor
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States.,Department of Chemistry , Stony Brook University , Stony Brook , New York 11794 , United States
| | - Katherine H O'Toole
- Department of Chemistry , Boston University , Boston , Massachusetts 02215 , United States
| | - Lindsey M Easthon
- Department of Chemistry , Boston University , Boston , Massachusetts 02215 , United States
| | - Mingyuan Ge
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Randy J Smith
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Xiaojing Huang
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Hanfei Yan
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Yong S Chu
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Si Chen
- Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States
| | - Doga Gursoy
- Advanced Photon Source , Argonne National Laboratory , Lemont , Illinois 60439 , United States.,Department of Electrical Engineering and Computer Science , Northwestern University , Evanston , Illinois 60298 , United States
| | - Martina Ralle
- Department of Molecular and Medical Genetics , Oregon Health Science University , Portland , Oregon 97239 , United States
| | - Barbara Imperiali
- Department of Biology , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Karen N Allen
- Department of Chemistry , Boston University , Boston , Massachusetts 02215 , United States
| | - Lisa M Miller
- National Synchrotron Light Source II , Brookhaven National Laboratory , Upton , New York 11973 , United States.,Department of Chemistry , Stony Brook University , Stony Brook , New York 11794 , United States
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24
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Rumancev C, Gräfenstein A, Vöpel T, Stuhr S, von Gundlach AR, Senkbeil T, Garrevoet J, Jolmes L, König B, Falkenberg G, Ebbinghaus S, Schroeder WH, Rosenhahn A. X-ray fluorescence analysis of metal distributions in cryogenic biological samples using large-acceptance-angle SDD detection and continuous scanning at the Hard X-ray Micro/Nano-Probe beamline P06 at PETRA III. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:60-66. [PMID: 31868737 PMCID: PMC6927521 DOI: 10.1107/s1600577519014048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
A new Rococo 2 X-ray fluorescence detector was implemented into the cryogenic sample environment at the Hard X-ray Micro/Nano-Probe beamline P06 at PETRA III, DESY, Hamburg, Germany. A four sensor-field cloverleaf design is optimized for the investigation of planar samples and operates in a backscattering geometry resulting in a large solid angle of up to 1.1 steradian. The detector, coupled with the Xspress 3 pulse processor, enables measurements at high count rates of up to 106 counts per second per sensor. The measured energy resolution of ∼129 eV (Mn Kα at 10000 counts s-1) is only minimally impaired at the highest count rates. The resulting high detection sensitivity allows for an accurate determination of trace element distributions such as in thin frozen hydrated biological specimens. First proof-of-principle measurements using continuous-movement 2D scans of frozen hydrated HeLa cells as a model system are reported to demonstrate the potential of the new detection system.
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Affiliation(s)
- C. Rumancev
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - A. Gräfenstein
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - T. Vöpel
- Department of Physical Chemistry II, Ruhr University Bochum, 44780 Bochum, Germany
| | - S. Stuhr
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - A. R. von Gundlach
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - T. Senkbeil
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - J. Garrevoet
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, Hamburg, Germany
| | - L. Jolmes
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - B. König
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
| | - G. Falkenberg
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, Hamburg, Germany
| | - S. Ebbinghaus
- Department of Physical Chemistry II, Ruhr University Bochum, 44780 Bochum, Germany
- Institute of Physical and Theoretical Chemistry, TU Braunschweig, Rebenring 56, 38106 Braunschweig, Germany
| | - W. H. Schroeder
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, Hamburg, Germany
- Nanotech Consulting, Arnoldsweilerstrasse 10, 52382 Niederzier, Germany
| | - A. Rosenhahn
- Analytical Chemistry – Biointerfaces, Ruhr University Bochum, 44780 Bochum, Germany
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25
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Abstract
For the past several decades, synchrotron radiation has been extensively used to measure the spatial distribution and chemical affinity of elements found in trace concentrations (<few μg/g) in animal and human tissues. Intense and highly focused (lateral size of several micrometers) X-ray beams combined with small steps of photon energy tuning (2-3 eV) of synchrotron radiation allowed X-ray fluorescence (XRF) and X-ray absorption spectroscopy (XAS) techniques to nondestructively and simultaneously detect trace elements as well as identify their chemical affinity and speciation in situ, respectively. Although limited by measurement time and radiation damage to the tissue, these techniques are commonly used to obtain two-dimensional and three-dimensional maps of several elements at synchrotron facilities around the world. The spatial distribution and chemistry of the trace elements obtained is then correlated to the targeted anatomical structures and to the biological functions (normal or pathological). For example, synchrotron-based in vitro studies of various human tissues showed significant differences between the normal and pathological distributions of metallic trace elements such as iron, zinc, copper, and lead in relation to human diseases ranging from Parkinson's disease and cancer to osteoporosis and osteoarthritis. Current research effort is aimed at not only measuring the abnormal elemental distributions associated with various diseases, but also indicate or discover possible biological mechanisms that could explain such observations. While a number of studies confirmed and strengthened previous knowledge, others revealed or suggested new possible roles of trace elements or provided a more accurate spatial distribution in relation to the underlying histology. This area of research is at the intersection of several current fundamental and applied scientific inquiries such as metabolomics, medicine, biochemistry, toxicology, food science, health physics, and environmental and public health.
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26
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Di ZW, Chen S, Gursoy D, Paunesku T, Leyffer S, Wild SM, Vogt S. Optimization-based simultaneous alignment and reconstruction in multi-element tomography. OPTICS LETTERS 2019; 44:4331-4334. [PMID: 31465395 DOI: 10.1364/ol.44.004331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 07/27/2019] [Indexed: 05/27/2023]
Abstract
As x-ray microscopy is pushed into the nanoscale with the advent of more bright and coherent x-ray sources, associated improvement in spatial resolution becomes highly vulnerable to geometrical errors and uncertainties during data collection. We address a form of error in tomography experiments, namely, the drift between projections during the tomographic scan. Our proposed method can simultaneously recover the drift, while tomographically reconstructing the specimen based on a joint iterative optimization scheme. This approach utilizes the correlation provided from different view angles and different signals. While generally applicable, we demonstrate our method on x-ray fluorescence tomography from a tissue specimen and compare the reconstruction quality with conventional methods.
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27
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Morris EK, Morris DJP, Vogt S, Gleber SC, Bigalke M, Wilcke W, Rillig MC. Visualizing the dynamics of soil aggregation as affected by arbuscular mycorrhizal fungi. THE ISME JOURNAL 2019; 13:1639-1646. [PMID: 30742058 PMCID: PMC6775962 DOI: 10.1038/s41396-019-0369-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 12/30/2018] [Accepted: 01/19/2019] [Indexed: 11/09/2022]
Abstract
Stable soils provide valuable ecosystem services and mechanical soil stability is enhanced by the presence of arbuscular mycorrhizal fungi (AMF). Soil aggregation, which is the major driver of mechanical soil stability, is often treated as a static phenomenon, even though aggregate turnover is continually ongoing. In fact, some breakdown of macroaggregates is necessary to allow new aggregate formation and inclusion of new organic matter into microaggregates. We determined how aggregate turnover times were affected by AMF by tracking movement of rare earth elements (REE), applied as their immobile oxides, between aggregate size classes, and using X-ray fluorescence microscopy to spatially localize REEs in a sample of aggregates. Here we show that AMF increased large macroaggregate formation and slowed down disintegration of large and small macroaggregates. Microaggregate turnover was increased in the presence of AMF. Internal aggregate organization suggested that although formation of microaggregates by accretion of soil to particulate organic matter is common, it is not the only mechanism in operation.
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Affiliation(s)
- E K Morris
- Department of Biology, Xavier University, 3800 Victory Parkway, Cincinnati, OH, 45207, USA.
- Institut für Biologie, Pflanzenökologie, Freie Universität Berlin, Altensteinstr. 6, 14195, Berlin, Germany.
| | - D J P Morris
- Department of Physics, Xavier University, 3800 Victory Parkway, Cincinnati, OH, 45207, USA
| | - S Vogt
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Ave., Lemont, IL, 60439, USA
| | - S-C Gleber
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Ave., Lemont, IL, 60439, USA
- Institut für Röntgenphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
| | - M Bigalke
- Institute of Geography, University of Bern, Hallerstrasse 12, 3012, Bern, Switzerland
| | - W Wilcke
- Institut für Geographie und Geoökologie, Karlsruher Institut für Technologie (KIT), Reinhard-Baumeister-Platz 1, 76131, Karlsruhe, Germany
| | - M C Rillig
- Institut für Biologie, Pflanzenökologie, Freie Universität Berlin, Altensteinstr. 6, 14195, Berlin, Germany
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28
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Popović J, Klajn A, Paunesku T, Ma Q, Chen S, Lai B, Stevanović M, Woloschak GE. Neuroprotective Role of Selected Antioxidant Agents in Preventing Cisplatin-Induced Damage of Human Neurons In Vitro. Cell Mol Neurobiol 2019; 39:619-636. [PMID: 30874981 PMCID: PMC6535150 DOI: 10.1007/s10571-019-00667-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 02/28/2019] [Indexed: 12/17/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a side effect of platinum-based chemotherapy and decreases the quality of life of cancer patients. We compared neuroprotective properties of several agents using an in vitro model of terminally differentiated human cells NT2-N derived from cell line NT2/D1. Sodium azide and an active metabolite of amifostine (WR1065) increase cell viability in simultaneous treatment with cisplatin. In addition, WR1065 protects the non-dividing neurons by decreasing cisplatin caused oxidative stress and apoptosis. Accumulation of Pt in cisplatin-treated cells was heterogeneous, but the frequency and concentration of Pt in cells were lowered in the presence of WR1065 as shown by X-ray fluorescence microscopy (XFM). Transition metals accumulation accompanied Pt increase in cells; this effect was equally diminished in the presence of WR1065. To analyze possible chemical modulation of Pt-DNA bonds, we examined the platinum LIII near edge spectrum by X-ray absorption spectroscopy. The spectrum found in cisplatin-DNA samples is altered differently by the addition of either WR1065 or sodium azide. Importantly, a similar change in Pt edge spectra was noted in cells treated with cisplatin and WR1065. Therefore, amifostine should be reconsidered as a candidate for treatments that reduce or prevent CIPN.
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Affiliation(s)
- Jelena Popović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA
| | - Andrijana Klajn
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia
| | - Tatjana Paunesku
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA
| | - Qing Ma
- DND CAT, Northwestern Synchrotron Research Center at the Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Milena Stevanović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia.
- Faculty of Biology, University of Belgrade, Belgrade, 11000, Serbia.
- Serbian Academy of Sciences and Arts, Belgrade, 11000, Serbia.
| | - Gayle E Woloschak
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA.
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29
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Grochowski C, Blicharska E, Krukow P, Jonak K, Maciejewski M, Szczepanek D, Jonak K, Flieger J, Maciejewski R. Analysis of Trace Elements in Human Brain: Its Aim, Methods, and Concentration Levels. Front Chem 2019; 7:115. [PMID: 30891444 PMCID: PMC6411644 DOI: 10.3389/fchem.2019.00115] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 02/14/2019] [Indexed: 12/20/2022] Open
Abstract
Trace elements play a crucial role in many biochemical processes, mainly as components of vitamins and enzymes. Although small amounts of metal ions have protective properties, excess metal levels result in oxidative injury, which is why metal ion homeostasis is crucial for the proper functioning of the brain. The changes of their level in the brain have been proven to be a risk factor for Alzheimer's, Parkinson's, and Huntington's diseases, as well as amyotrophic lateral sclerosis. Therefore, it is currently an important application of various analytical methods. This review covers the most important of them: inductively coupled ground mass spectrometry (ICP-MS), flame-induced atomic absorption spectrometry (FAAS), electrothermal atomic absorption spectrometry (GFAAS), optical emission spectrometry with excitation in inductively coupled plasma (ICP-OES), X-ray fluorescence spectrometry (XRF), and neutron activation analysis (NAA). Additionally, we present a summary of concentration values found by different research groups.
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Affiliation(s)
- Cezary Grochowski
- Department of Anatomy, Medical University of Lublin, Lublin, Poland
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Lublin, Poland
| | - Eliza Blicharska
- Department of Analytical Chemistry, Medical University of Lublin, Lublin, Poland
| | - Paweł Krukow
- Department of Clinical Neuropsychiatry, Medical University of Lublin, Lublin, Poland
| | - Kamil Jonak
- Department of Psychiatry, Psychotherapy and Early Intervention, Medical University of Lublin, Lublin, Poland
- Department of Biomedical Engineering, Lublin University of Technology, Lublin, Poland
| | - Marcin Maciejewski
- Institute of Electronics and Information Technology, Lublin University of Technology, Lublin, Poland
| | - Dariusz Szczepanek
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Lublin, Poland
| | - Katarzyna Jonak
- Department of Foreign Languages, Medical University of Lublin, Lublin, Poland
| | - Jolanta Flieger
- Department of Analytical Chemistry, Medical University of Lublin, Lublin, Poland
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30
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Fan W, Tang W, Lau J, Shen Z, Xie J, Shi J, Chen X. Breaking the Depth Dependence by Nanotechnology-Enhanced X-Ray-Excited Deep Cancer Theranostics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806381. [PMID: 30698854 DOI: 10.1002/adma.201806381] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/26/2018] [Indexed: 05/12/2023]
Abstract
The advancements in nanotechnology have created multifunctional nanomaterials aimed at enhancing diagnostic accuracy and treatment efficacy for cancer. However, the ability to target deep-seated tumors remains one of the most critical challenges for certain nanomedicine applications. To this end, X-ray-excited theranostic techniques provide a means of overcoming the limits of light penetration and tissue attenuation. Herein, a comprehensive overview of the recent advances in nanotechnology-enhanced X-ray-excited imaging and therapeutic methodologies is presented, with an emphasis on the design of multifunctional nanomaterials for contrast-enhanced computed tomography (CT) imaging, X-ray-excited optical luminescence (XEOL) imaging, and X-ray-excited multimodal synchronous/synergistic therapy. The latter is based on the concurrent use of radiotherapy with chemotherapy, gas therapy, photodynamic therapy, or immunotherapy. Moreover, the featured biomedical applications of X-ray-excited deep theranostics are discussed to highlight the advantages of X-ray in high-sensitivity detection and efficient elimination of malignant tumors. Finally, key issues and technical challenges associated with this deep theranostic technology are identified, with the intention of advancing its translation into the clinic.
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Affiliation(s)
- Wenpei Fan
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Wei Tang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Joseph Lau
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Zheyu Shen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Jin Xie
- Department of Chemistry, University of Georgia, Athens, GA, 30602, USA
| | - Jianlin Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
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31
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Crawford AM, Deb A, Penner-Hahn JE. M-BLANK: a program for the fitting of X-ray fluorescence spectra. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:497-503. [PMID: 30855260 PMCID: PMC6412182 DOI: 10.1107/s1600577519000651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 01/14/2019] [Indexed: 05/23/2023]
Abstract
The X-ray fluorescence data from X-ray microprobe and nanoprobe measurements must be fitted to obtain reliable elemental maps. The most common approach in many fitting programs is to initially remove a per-pixel baseline. Using X-ray fluorescence data of yeast and glial cells, it is shown that per-pixel baselines can result in significant, systematic errors in quantitation and that significantly improved data can be obtained by calculating an average blank spectrum and subtracting this from each pixel.
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Affiliation(s)
- Andrew M. Crawford
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
- Department of Geology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - Aniruddha Deb
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
| | - James E. Penner-Hahn
- Department of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
- Department of Biophysics, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109-1055, USA
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32
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Zelinka SL, Jakes JE, Kirker GT, Passarini L, Hunt CG, Lai B, Antipova O, Li L, Vogt S. Copper distribution and oxidation states near corroded fasteners in treated wood. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0249-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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33
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Deng J, Lo YH, Gallagher-Jones M, Chen S, Pryor A, Jin Q, Hong YP, Nashed YSG, Vogt S, Miao J, Jacobsen C. Correlative 3D x-ray fluorescence and ptychographic tomography of frozen-hydrated green algae. SCIENCE ADVANCES 2018; 4:eaau4548. [PMID: 30406204 PMCID: PMC6214637 DOI: 10.1126/sciadv.aau4548] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 09/24/2018] [Indexed: 05/20/2023]
Abstract
Accurate knowledge of elemental distributions within biological organisms is critical for understanding their cellular roles. The ability to couple this knowledge with overall cellular architecture in three dimensions (3D) deepens our understanding of cellular chemistry. Using a whole, frozen-hydrated Chlamydomonas reinhardtii cell as an example, we report the development of 3D correlative microscopy through a combination of simultaneous cryogenic x-ray ptychography and x-ray fluorescence microscopy. By taking advantage of a recently developed tomographic reconstruction algorithm, termed GENeralized Fourier Iterative REconstruction (GENFIRE), we produce high-quality 3D maps of the unlabeled alga's cellular ultrastructure and elemental distributions within the cell. We demonstrate GENFIRE's ability to outperform conventional tomography algorithms and to further improve the reconstruction quality by refining the experimentally intended tomographic angles. As this method continues to advance with brighter coherent light sources and more efficient data handling, we expect correlative 3D x-ray fluorescence and ptychographic tomography to be a powerful tool for probing a wide range of frozen-hydrated biological specimens, ranging from small prokaryotes such as bacteria, algae, and parasites to large eukaryotes such as mammalian cells, with applications that include understanding cellular responses to environmental stimuli and cell-to-cell interactions.
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Affiliation(s)
- Junjing Deng
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Yuan Hung Lo
- Department of Physics and Astronomy and California NanoSystems Institute, University of California Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California Los Angeles, CA 90095, USA
| | - Marcus Gallagher-Jones
- Department of Physics and Astronomy and California NanoSystems Institute, University of California Los Angeles, CA 90095, USA
- Department of Chemistry & Biochemistry, UCLA-DOE Institute for Genomics and Proteomics, Los Angeles, CA 90095-1570, USA
| | - Si Chen
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Alan Pryor
- Department of Physics and Astronomy and California NanoSystems Institute, University of California Los Angeles, CA 90095, USA
| | - Qiaoling Jin
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
| | - Young Pyo Hong
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
| | - Youssef S. G. Nashed
- Mathematics and Computing Science Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Jianwei Miao
- Department of Physics and Astronomy and California NanoSystems Institute, University of California Los Angeles, CA 90095, USA
- Corresponding author. (J.M.); (C.J.)
| | - Chris Jacobsen
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
- Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Corresponding author. (J.M.); (C.J.)
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34
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Morrell AP, Mosselmans JFW, Geraki K, Ignatyev K, Castillo-Michel H, Monksfield P, Warfield AT, Febbraio M, Roberts HM, Addison O, Martin RA. Implications of X-ray beam profiles on qualitative and quantitative synchrotron micro-focus X-ray fluorescence microscopy. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:1719-1726. [PMID: 30407182 DOI: 10.1107/s160057751801247x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 09/04/2018] [Indexed: 06/08/2023]
Abstract
Synchrotron radiation X-ray fluorescence microscopy is frequently used to investigate the spatial distribution of elements within a wide range of samples. Interrogation of heterogeneous samples that contain large concentration ranges has the potential to produce image artefacts due to the profile of the X-ray beam. The presence of these artefacts and the distribution of flux within the beam profile can significantly affect qualitative and quantitative analyses. Two distinct correction methods have been generated by referencing the beam profile itself or by employing an adaptive-thresholding procedure. Both methods significantly improve qualitative imaging by removing the artefacts without compromising the low-intensity features. The beam-profile correction method improves quantitative results but requires accurate two-dimensional characterization of the X-ray beam profile.
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Affiliation(s)
- Alexander P Morrell
- Aston Institute of Materials Research, School of Engineering, University of Aston, Birmingham B4 7ET, UK
| | | | - Kalotina Geraki
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon OX11 0DE, UK
| | - Konstantin Ignatyev
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon OX11 0DE, UK
| | | | - Peter Monksfield
- University Hospitals Birmingham, NHS Foundation Trust, Edgbaston, Birmingham B15 2TH, UK
| | - Adrian T Warfield
- University Hospitals Birmingham, NHS Foundation Trust, Edgbaston, Birmingham B15 2TH, UK
| | - Maria Febbraio
- School of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada T6G 1C9
| | - Helen M Roberts
- School of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada T6G 1C9
| | - Owen Addison
- School of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada T6G 1C9
| | - Richard A Martin
- Aston Institute of Materials Research, School of Engineering, University of Aston, Birmingham B4 7ET, UK
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35
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Crawford AM, Sylvain NJ, Hou H, Hackett MJ, Pushie MJ, Pickering IJ, George GN, Kelly ME. A comparison of parametric and integrative approaches for X-ray fluorescence analysis applied to a Stroke model. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:1780-1789. [PMID: 30407190 PMCID: PMC6225743 DOI: 10.1107/s1600577518010895] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 07/29/2018] [Indexed: 05/07/2023]
Abstract
Synchrotron X-ray fluorescence imaging enables visualization and quantification of microscopic distributions of elements. This versatile technique has matured to the point where it is used in a wide range of research fields. The method can be used to quantitate the levels of different elements in the image on a pixel-by-pixel basis. Two approaches to X-ray fluorescence image analysis are commonly used, namely, (i) integrative analysis, or window binning, which simply sums the numbers of all photons detected within a specific energy region of interest; and (ii) parametric analysis, or fitting, in which emission spectra are represented by the sum of parameters representing a series of peaks and other contributing factors. This paper presents a quantitative comparison between these two methods of image analysis using X-ray fluorescence imaging of mouse brain-tissue sections; it is shown that substantial errors can result when data from overlapping emission lines are binned rather than fitted. These differences are explored using two different digital signal processing data-acquisition systems with different count-rate and emission-line resolution characteristics. Irrespective of the digital signal processing electronics, there are substantial differences in quantitation between the two approaches. Binning analyses are thus shown to contain significant errors that not only distort the data but in some cases result in complete reversal of trends between different tissue regions.
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Affiliation(s)
- Andrew M. Crawford
- Geology, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Nicole J. Sylvain
- Division of Neurosurgery, Department of Surgery, College of Medicine, University of Saskatchewan, 103 Hospital Drive, Saskatoon, Saskatchewan S7N 0W8, Canada
| | - Huishu Hou
- Division of Neurosurgery, Department of Surgery, College of Medicine, University of Saskatchewan, 103 Hospital Drive, Saskatoon, Saskatchewan S7N 0W8, Canada
| | - Mark J. Hackett
- Curtin Institute for Functional Molecules and Interfaces, Department of Chemistry, Faculty of Science and Engineering, Curtin University, Kent Street, Bently, Western Australia 6102, Australia
- Curtin Health Innovation Research Institute, Curtin University, Kent Street, Bently, Western Australia 6102, Australia
| | - M. Jake Pushie
- Division of Neurosurgery, Department of Surgery, College of Medicine, University of Saskatchewan, 103 Hospital Drive, Saskatoon, Saskatchewan S7N 0W8, Canada
| | - Ingrid J. Pickering
- Geology, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Graham N. George
- Geology, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - Michael E. Kelly
- Division of Neurosurgery, Department of Surgery, College of Medicine, University of Saskatchewan, 103 Hospital Drive, Saskatoon, Saskatchewan S7N 0W8, Canada
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Ching DJ, Hidayetoğlu M, Biçer T, Gürsoy D. Rotation-as-fast-axis scanning-probe x-ray tomography: the importance of angular diversity for fly-scan modes. APPLIED OPTICS 2018; 57:8780-8789. [PMID: 30461860 DOI: 10.1364/ao.57.008780] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 09/15/2018] [Indexed: 06/09/2023]
Abstract
We investigate the effects of angular diversity on image-reconstruction quality of scanning-probe x-ray tomography for both fly- and step-mode data collection. We propose probe-coverage maps as a tool for both visualizing and quantifying the distribution of probe interactions with the object. We show that data sampling with more angular diversity yields better tomographic image reconstruction as long as it does not come at the cost of not covering some voxels in the object. Therefore, for fly-mode data collection, rotation-as-fast-axis (RAFA) trajectories are superior to raster or other non-RAFA trajectories because they allow for the increasing of angular diversity without sacrificing spatial coverage uniformity. In contrast, for step-mode data collection and a fixed measurement budget, increasing angular diversity can come at the cost of not covering some voxels, and may not be desired. This study has implications for how scanning-probe microscopes should be collecting data in order to make the most of limited resources.
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Structure and Chemical Organization in Damselfly Calopteryx haemorrhoidalis Wings: A Spatially Resolved FTIR and XRF Analysis with Synchrotron Radiation. Sci Rep 2018; 8:8413. [PMID: 29849036 PMCID: PMC5976759 DOI: 10.1038/s41598-018-26563-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 05/14/2018] [Indexed: 12/05/2022] Open
Abstract
Insects represent the majority of known animal species and exploit a variety of fascinating nanotechnological concepts. We investigated the wings of the damselfly Calopteryx haemorrhoidalis, whose males have dark pigmented wings and females have slightly pigmented wings. We used scanning electron microscopy (SEM) and nanoscale synchrotron X-ray fluorescence (XRF) microscopy analysis for characterizing the nanostructure and the elemental distribution of the wings, respectively. The spatially resolved distribution of the organic constituents was examined by synchrotron Fourier transform infrared (s-FTIR) microspectroscopy and subsequently analyzed using hierarchical cluster analysis. The chemical distribution across the wing was rather uniform with no evidence of melanin in female wings, but with a high content of melanin in male wings. Our data revealed a fiber-like structure of the hairs and confirmed the presence of voids close to its base connecting the hairs to the damselfly wings. Within these voids, all detected elements were found to be locally depleted. Structure and elemental contents varied between wing membranes, hairs and veins. The elemental distribution across the membrane was rather uniform, with higher Ca, Cu and Zn levels in the male damselfly wing membranes.
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38
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Nietzold T, West BM, Stuckelberger M, Lai B, Vogt S, Bertoni MI. Quantifying X-Ray Fluorescence Data Using MAPS. J Vis Exp 2018. [PMID: 29553551 DOI: 10.3791/56042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The quantification of X-ray fluorescence (XRF) microscopy maps by fitting the raw spectra to a known standard is crucial for evaluating chemical composition and elemental distribution within a material. Synchrotron-based XRF has become an integral characterization technique for a variety of research topics, particularly due to its non-destructive nature and its high sensitivity. Today, synchrotrons can acquire fluorescence data at spatial resolutions well below a micron, allowing for the evaluation of compositional variations at the nanoscale. Through proper quantification, it is then possible to obtain an in-depth, high-resolution understanding of elemental segregation, stoichiometric relationships, and clustering behavior. This article explains how to use the MAPS fitting software developed by Argonne National Laboratory for the quantification of full 2-D XRF maps. We use as an example results from a Cu(In,Ga)Se2 solar cell, taken at the Advanced Photon Source beamline 2-ID-D at Argonne National Laboratory. We show the standard procedure for fitting raw data, demonstrate how to evaluate the quality of a fit and present the typical outputs generated by the program. In addition, we discuss in this manuscript certain software limitations and offer suggestions for how to further correct the data to be numerically accurate and representative of spatially resolved, elemental concentrations.
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Affiliation(s)
- Tara Nietzold
- School for Engineering of Matter, Transport, and Energy, Arizona State University
| | - Bradley M West
- School of Electrical, Computer, and Energy Engineering, Arizona State University
| | | | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory
| | - Mariana I Bertoni
- School of Electrical, Computer, and Energy Engineering, Arizona State University;
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Single-cell RNA sequencing reveals metallothionein heterogeneity during hESC differentiation to definitive endoderm. Stem Cell Res 2018; 28:48-55. [PMID: 29427839 DOI: 10.1016/j.scr.2018.01.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 12/04/2017] [Accepted: 01/11/2018] [Indexed: 12/25/2022] Open
Abstract
Differentiation of human pluripotent stem cells towards definitive endoderm (DE) is the critical first step for generating cells comprising organs such as the gut, liver, pancreas and lung. This in-vitro differentiation process generates a heterogeneous population with a proportion of cells failing to differentiate properly and maintaining expression of pluripotency factors such as Oct4. RNA sequencing of single cells collected at four time points during a 4-day DE differentiation identified high expression of metallothionein genes in the residual Oct4-positive cells that failed to differentiate to DE. Using X-ray fluorescence microscopy and multi-isotope mass spectrometry, we discovered that high intracellular zinc level corresponds with persistent Oct4 expression and failure to differentiate. This study improves our understanding of the cellular heterogeneity during in-vitro directed differentiation and provides a valuable resource to improve DE differentiation efficiency.
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Li YF, Zhao J, Gao Y, Chen C, Chai Z. Advanced Nuclear and Related Techniques for Metallomics and Nanometallomics. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1055:213-243. [PMID: 29884967 DOI: 10.1007/978-3-319-90143-5_9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Metallomics, focusing on the global and systematic understanding of the metal uptake, trafficking, role, and excretion in biological systems, has attracted more and more attention. Metal-related nanomaterials, including metallic and metal-containing nanomaterials, have unique properties compared to their macroscale counterparts and therefore require special attention. The absorption, distribution, metabolism, excretion (ADME) behavior of metal-related nanomaterials in the biological systems is influenced by their physicochemical properties, the exposure route, and the microenvironment of the deposition site. Nanomaterials not only may interact directly or indirectly with genes, proteins, and other molecules to bring genotoxicity, immunotoxicity, DNA damage, and cytotoxicity but may also stimulate the immune responses, circumvent tumor resistance, and inhibit tumor metastasis. Because of their advantages of absolute quantification, high sensitivity, excellent accuracy and precision, low matrix effects, and nondestructiveness, nuclear and related analytical techniques have been playing important roles in the study of metallomics and nanometallomics. In this chapter, we present a comprehensive overview of nuclear and related analytical techniques applied to the quantification of metallome and nanometallome, the biodistribution, bioaccumulation, and transformation of metallome and nanometallome in vivo, and the structural analysis. Besides, metallomics and nanometallomics need to cooperate with other -omics, like genomics, proteomics, and metabolomics, to obtain the knowledge of underlying mechanisms and therefore to improve the application performance and to reduce the potential risk of metallome and nanometallome.
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Affiliation(s)
- Yu-Feng Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and Laboratory for Metallomic and Nanometallomics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Jiating Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and Laboratory for Metallomic and Nanometallomics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Yuxi Gao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and Laboratory for Metallomic and Nanometallomics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, Beijing, China
| | - Zhifang Chai
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and Laboratory for Metallomic and Nanometallomics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China.
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Abstract
X-ray fluorescence-detected flow cytometry can enable the detection and characterization of ultra-trace, trace, and bulk elemental content at the cellular level using synchrotron-induced x-ray emission from fully aquated actively respiring cells. Although very much still a technique in development, this technique has been used to characterize cell-to-cell elemental variability in bovine red blood cells, Saccharomyces cerevisiae, and NIH3T3 mouse fibroblasts. Herein we describe the experimental setup and the key methodological aspects of data collection and processing.
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42
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Brown K, Thurn T, Xin L, Liu W, Bazak R, Chen S, Lai B, Vogt S, Jacobsen C, Paunesku T, Woloschak GE. Intracellular in situ labeling of TiO 2 nanoparticles for fluorescence microscopy detection. NANO RESEARCH 2018; 11:464-476. [PMID: 29541425 PMCID: PMC5846489 DOI: 10.1007/s12274-017-1654-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Titanium dioxide (TiO2) nanoparticles are produced for many different purposes, including development of therapeutic and diagnostic nanoparticles for cancer detection and treatment, drug delivery, induction of DNA double-strand breaks, and imaging of specific cells and subcellular structures. Currently, the use of optical microscopy, an imaging technique most accessible to biology and medical pathology, to detect TiO2 nanoparticles in cells and tissues ex vivo is limited with low detection limits, while more sensitive imaging methods (transmission electron microscopy, X-ray fluorescence microscopy, etc.) have low throughput and technical and operational complications. Herein, we describe two in situ post-treatment labeling approaches to stain TiO2 nanoparticles taken up by the cells. The first approach utilizes fluorescent biotin and fluorescent streptavidin to label the nanoparticles before and after cellular uptake; the second approach is based on the copper-catalyzed azide-alkyne cycloaddition, the so-called Click chemistry, for labeling and detection of azide-conjugated TiO2 nanoparticles with alkyne-conjugated fluorescent dyes such as Alexa Fluor 488. To confirm that optical fluorescence signals of these nanoparticles match the distribution of the Ti element, we used synchrotron X-ray fluorescence microscopy (XFM) at the Advanced Photon Source at Argonne National Laboratory. Titanium-specific XFM showed excellent overlap with the location of optical fluorescence detected by confocal microscopy. Therefore, future experiments with TiO2 nanoparticles may safely rely on confocal microscopy after in situ nanoparticle labeling using approaches described here.
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Affiliation(s)
- Koshonna Brown
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Ted Thurn
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Lun Xin
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - William Liu
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Remon Bazak
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Stefan Vogt
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Chris Jacobsen
- Department of Physics & Astronomy, Weinberg College of Arts and Sciences, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Tatjana Paunesku
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
| | - Gayle E Woloschak
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
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43
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New EJ, Wimmer VC, Hare DJ. Promises and Pitfalls of Metal Imaging in Biology. Cell Chem Biol 2017; 25:7-18. [PMID: 29153850 DOI: 10.1016/j.chembiol.2017.10.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 06/02/2017] [Accepted: 10/18/2017] [Indexed: 10/18/2022]
Abstract
A picture may speak a thousand words, but if those words fail to form a coherent sentence there is little to be learned. As cutting-edge imaging technology now provides us the tools to decipher the multitude of roles played by metals and metalloids in molecular, cellular, and developmental biology, as well as health and disease, it is time to reflect on the advances made in imaging, the limitations discovered, and the future of a burgeoning field. In this Perspective, the current state of the art is discussed from a self-imposed contrarian position, as we not only highlight the major advances made over the years but use them as teachable moments to zoom in on challenges that remain to be overcome. We also describe the steps being taken toward being able to paint a completely undisturbed picture of cellular metal metabolism, which is, metaphorically speaking, the Holy Grail of the discipline.
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Affiliation(s)
- Elizabeth J New
- School of Chemistry, The University of Sydney, Camperdown, NSW 2006, Australia
| | - Verena C Wimmer
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC 3052, Australia
| | - Dominic J Hare
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC 3052, Australia; Elemental Bio-imaging Facility, University of Technology Sydney, Broadway, NSW 2007, Australia; Department of Pathology, The University of Melbourne, Parkville, VIC 3052, Australia.
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44
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X-ray ptychographic and fluorescence microscopy of frozen-hydrated cells using continuous scanning. Sci Rep 2017; 7:445. [PMID: 28348401 PMCID: PMC5428657 DOI: 10.1038/s41598-017-00569-y] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/03/2017] [Indexed: 01/19/2023] Open
Abstract
X-ray microscopy can be used to image whole, unsectioned cells in their native hydrated state. It complements the higher resolution of electron microscopy for submicrometer thick specimens, and the molecule-specific imaging capabilites of fluorescence light microscopy. We describe here the first use of fast, continuous x-ray scanning of frozen hydrated cells for simultaneous sub-20 nm resolution ptychographic transmission imaging with high contrast, and sub-100 nm resolution deconvolved x-ray fluorescence imaging of diffusible and bound ions at native concentrations, without the need to add specific labels. By working with cells that have been rapidly frozen without the use of chemical fixatives, and imaging them under cryogenic conditions, we are able to obtain images with well preserved structural and chemical composition, and sufficient stability against radiation damage to allow for multiple images to be obtained with no observable change.
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45
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Kieler-Ferguson HM, Chan D, Sockolosky J, Finney L, Maxey E, Vogt S, Szoka FC. Encapsulation, controlled release, and antitumor efficacy of cisplatin delivered in liposomes composed of sterol-modified phospholipids. Eur J Pharm Sci 2017; 103:85-93. [PMID: 28263913 DOI: 10.1016/j.ejps.2017.03.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/01/2017] [Accepted: 03/02/2017] [Indexed: 10/20/2022]
Abstract
We employed a recently introduced class of sterol-modified lipids (SML) to produce m-PEG-DSPE containing liposome compositions with a range of cis-platinum content release rates. SML have a cholesterol succinate attached to the phosphatidylglycerol head group and a fatty acid at the 2 position. These compositions were compared to the well-studied liposome phospholipid compositions: mPEG-DSPE/Hydrogenated Soy PC/cholesterol or mPEG-DSPE/POPC/cholesterol to determine the effect of the cis-platinum release extent on C26 tumor proliferation in the BALB/c colon carcinoma mouse model. The release rates of cis-platinum from liposomes composed of SML are a function of the acyl chain length. SML-liposomes with shorter acyl chain lengths C-8 provided more rapid cisplatin release, lower in vitro IC50, and were easier to formulate compared to liposomes using traditional phospholipid compositions. Similar to other liposome cis-platinum formulations, the half-life of m-PEG-DSPE SML liposome cisplatin is substantially longer than the free drug. This resulted in a higher tumor cisplatin concentration at 48h post-dosing compared to the free drug and higher Pt-DNA adducts in the tumor. Moreover, the maximum tolerated dose of the liposome formulations where up to four fold greater than the free drug. Using X-ray fluorescence spectroscopy on tumor sections, we compared the location of platinum, to the location of a fluorescence lipid incorporated in the liposomes. The liposome platinum co-localized with the fluorescent lipid and both were non-uniformly distributed in the tumor. Non-encapsulated Cis-platinum, albeit at a low concentration, was more uniformly distributed thorough the tumor. Three liposome formulations, including the well-studied hydrogenated HSPC composition, had better antitumor activity in the murine colon 26 carcinoma model as compared to the free drug at the same dose but the SML liposome platinum formulations did not perform better than the HSPC formulation.
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Affiliation(s)
- Heidi M Kieler-Ferguson
- Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA; Department of Bioengineering and Therapeutic Sciences, School of Pharmacy, University of California, San Francisco, CA 94143-0912, USA
| | - Darren Chan
- Department of Bioengineering and Therapeutic Sciences, School of Pharmacy, University of California, San Francisco, CA 94143-0912, USA
| | - Jonathan Sockolosky
- Department of Bioengineering and Therapeutic Sciences, School of Pharmacy, University of California, San Francisco, CA 94143-0912, USA
| | - Lydia Finney
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Evan Maxey
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Stefan Vogt
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Francis C Szoka
- Department of Bioengineering and Therapeutic Sciences, School of Pharmacy, University of California, San Francisco, CA 94143-0912, USA.
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46
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Kirker G, Zelinka S, Gleber SC, Vine D, Finney L, Chen S, Hong YP, Uyarte O, Vogt S, Jellison J, Goodell B, Jakes JE. Synchrotron-based X-ray fluorescence microscopy enables multiscale spatial visualization of ions involved in fungal lignocellulose deconstruction. Sci Rep 2017; 7:41798. [PMID: 28139778 PMCID: PMC5282557 DOI: 10.1038/srep41798] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 12/28/2016] [Indexed: 12/18/2022] Open
Abstract
The role of ions in the fungal decay process of lignocellulose biomaterials, and more broadly fungal metabolism, has implications for diverse research disciplines ranging from plant pathology and forest ecology, to carbon sequestration. Despite the importance of ions in fungal decay mechanisms, the spatial distribution and quantification of ions in lignocellulosic cell walls and fungal hyphae during decay is not known. Here we employ synchrotron-based X-ray fluorescence microscopy (XFM) to map and quantify physiologically relevant ions, such as K, Ca, Mn, Fe, and Zn, in wood being decayed by the model brown rot fungus Serpula lacrymans. Two-dimensional XFM maps were obtained to study the ion spatial distributions from mm to submicron length scales in wood, fungal hyphae with the dried extracellular matrix (ECM) from the fungus, and Ca oxalate crystals. Three-dimensional ion volume reconstructions were also acquired of wood cell walls and hyphae with ECM. Results show that the fungus actively transports some ions, such as Fe, into the wood and controls the distribution of ions at both the bulk wood and cell wall length scales. These measurements provide new insights into the movement of ions during decay and illustrate how synchrotron-based XFM is uniquely suited study these ions.
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Affiliation(s)
- Grant Kirker
- Durability and Wood Protection Research, USDA Forest Service, Forest Products Laboratory, Madison, WI, USA
| | - Sam Zelinka
- Building and Fire Sciences, USDA Forest Service, Forest Products Laboratory, Madison, WI, USA
| | | | - David Vine
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - Lydia Finney
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - Si Chen
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - Young Pyo Hong
- Department of Physics and Astronomy, Northwestern University, Evanston, IL, USA
| | - Omar Uyarte
- Departamento de Biotecnologia, Escola de Engenharia de Lorena, Universidade de São Paulo, Brazil.,Centro I+D, CMPC Celulosa, Chile
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - Jody Jellison
- Center for Agriculture, Food and the Environment, University of Massachusetts - Amherst, Amherst, MA, USA
| | - Barry Goodell
- Department of Microbiology, University of Massachusetts - Amherst, Amherst, MA, USA
| | - Joseph E Jakes
- Forest Biopolymers Science and Engineering, USDA Forest Service, Forest Products Laboratory, Madison, WI, USA
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47
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Ackerman CM, Lee S, Chang CJ. Analytical Methods for Imaging Metals in Biology: From Transition Metal Metabolism to Transition Metal Signaling. Anal Chem 2017; 89:22-41. [PMID: 27976855 PMCID: PMC5827935 DOI: 10.1021/acs.analchem.6b04631] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Cheri M. Ackerman
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Sumin Lee
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Christopher J. Chang
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
- Howard Hughes Medical Institute, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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48
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Lee LCC, Leung KK, Lo KKW. Recent development of luminescent rhenium(i) tricarbonyl polypyridine complexes as cellular imaging reagents, anticancer drugs, and antibacterial agents. Dalton Trans 2017; 46:16357-16380. [DOI: 10.1039/c7dt03465b] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This Perspective summarizes recent advances in the biological applications of luminescent rhenium(i) tricarbonyl polypyridine complexes.
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Affiliation(s)
| | - Kam-Keung Leung
- Department of Chemistry
- City University of Hong Kong
- P. R. China
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49
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West BM, Stuckelberger M, Jeffries A, Gangam S, Lai B, Stripe B, Maser J, Rose V, Vogt S, Bertoni MI. X-ray fluorescence at nanoscale resolution for multicomponent layered structures: a solar cell case study. JOURNAL OF SYNCHROTRON RADIATION 2017; 24:288-295. [PMID: 28009569 DOI: 10.1107/s1600577516015721] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 10/06/2016] [Indexed: 06/06/2023]
Abstract
The study of a multilayered and multicomponent system by spatially resolved X-ray fluorescence microscopy poses unique challenges in achieving accurate quantification of elemental distributions. This is particularly true for the quantification of materials with high X-ray attenuation coefficients, depth-dependent composition variations and thickness variations. A widely applicable procedure for use after spectrum fitting and quantification is described. This procedure corrects the elemental distribution from the measured fluorescence signal, taking into account attenuation of the incident beam and generated fluorescence from multiple layers, and accounts for sample thickness variations. Deriving from Beer-Lambert's law, formulae are presented in a general integral form and numerically applicable framework. The procedure is applied using experimental data from a solar cell with a Cu(In,Ga)Se2 absorber layer, measured at two separate synchrotron beamlines with varied measurement geometries. This example shows the importance of these corrections in real material systems, which can change the interpretation of the measured distributions dramatically.
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Affiliation(s)
- Bradley M West
- School of Electrical, Computer, and Energy Engineering, Arizona State University, 551 E Tyler Mall, Tempe, AZ 85281, USA
| | - Michael Stuckelberger
- School of Electrical, Computer, and Energy Engineering, Arizona State University, 551 E Tyler Mall, Tempe, AZ 85281, USA
| | - April Jeffries
- School for Engineering of Matter, Transport, and Energy, Arizona State University, 551 E Tyler Mall, Tempe, AZ 85281, USA
| | - Srikanth Gangam
- School of Electrical, Computer, and Energy Engineering, Arizona State University, 551 E Tyler Mall, Tempe, AZ 85281, USA
| | - Barry Lai
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Benjamin Stripe
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Jörg Maser
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Volker Rose
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Stefan Vogt
- Advanced Photon Source, Argonne National Laboratory, Lemont, IL 60439, USA
| | - Mariana I Bertoni
- School of Electrical, Computer, and Energy Engineering, Arizona State University, 551 E Tyler Mall, Tempe, AZ 85281, USA
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In vitro toxicity assessment of oral nanocarriers. Adv Drug Deliv Rev 2016; 106:381-401. [PMID: 27544694 DOI: 10.1016/j.addr.2016.08.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 08/04/2016] [Accepted: 08/09/2016] [Indexed: 02/08/2023]
Abstract
The fascinating properties of nanomaterials opened new frontiers in medicine. Nanocarriers are useful systems in transporting drugs to site-specific targets. The unique physico-chemical characteristics making nanocarriers promising devices to treat diseases may also be responsible for potential adverse effects. In order to develop functional nano-based drug delivery systems, efficacy and safety should be carefully evaluated. To date, no common testing strategy to address nanomaterial toxicological challenges has been generated. Different cell culture models are currently used to evaluate nanocarrier safety using conventional in vitro assays, but overall they have generated a huge amount of conflicting data. In this review we describe state-of-the-art approaches for in vitro testing of orally administered nanocarriers, highlighting the importance of developing harmonized and validated standard operating procedures. These procedures should be applied in a safe-by-design context with the aim to reduce and/or eliminate the uncertainties and risks associated with nanomedicine development.
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