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Foo W, Wiede A, Bierwirth S, Heintzmann R, Press AT, Hauswald W. Automated multicolor mesoscopic imaging for the 3-dimensional reconstruction of fluorescent biomarker distribution in large tissue specimens. BIOMEDICAL OPTICS EXPRESS 2022; 13:3723-3742. [PMID: 35991909 PMCID: PMC9352298 DOI: 10.1364/boe.455215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 06/15/2023]
Abstract
Research in translational medicine often requires high-resolution characterization techniques to visualize or quantify the fluorescent probes. For example, drug delivery systems contain fluorescent molecules enabling in vitro and in vivo tracing to determine biodistribution or plasma disappearance. Albeit fluorescence imaging systems with sufficient resolution exist, the sample preparation is typically too complex to image a whole organism of the size of a mouse. This article established a mesoscopic imaging technique utilizing a commercially available cryo-microtome and an in-house built episcopic imaging add-on to perform imaging during serial sectioning. Here we demonstrate that our automated red, green, blue (RGB) and fluorescence mesoscope can generate sequential block-face and 3-dimensional anatomical images at variable thickness with high quality of 6 µm × 6 µm pixel size. In addition, this mesoscope features a numerical aperture of 0.10 and a field-of-view of up to 21.6 mm × 27 mm × 25 mm (width, height, depth).
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Affiliation(s)
- Wanling Foo
- Jena University Hospital, Department of Anesthesiology and Intensive Care Medicine, Am Klinikum 1, 07747 Jena, Germany
| | - Alexander Wiede
- Leibniz-Institute of Photonic Technology (Leibniz-IPHT), a Member of the Leibniz Research Alliance Leibniz Health Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Jena University Hospital, Center for Sepsis Control and Care, Am Klinikum 1, 07747 Jena, Germany
| | - Sebastian Bierwirth
- Leibniz-Institute of Photonic Technology (Leibniz-IPHT), a Member of the Leibniz Research Alliance Leibniz Health Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Rainer Heintzmann
- Leibniz-Institute of Photonic Technology (Leibniz-IPHT), a Member of the Leibniz Research Alliance Leibniz Health Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Friedrich-Schiller-University, Institut für Physikalische Chemie and Abbe Center of Photonics, Helmholtzweg 4, 07743 Jena, Germany
| | - Adrian T Press
- Jena University Hospital, Department of Anesthesiology and Intensive Care Medicine, Am Klinikum 1, 07747 Jena, Germany
- Jena University Hospital, Center for Sepsis Control and Care, Am Klinikum 1, 07747 Jena, Germany
- Medical Faculty, Friedrich-Schiller-University, Kastanienstraße 1, 07747 Jena, Germany
- Contributed equally
| | - Walter Hauswald
- Leibniz-Institute of Photonic Technology (Leibniz-IPHT), a Member of the Leibniz Research Alliance Leibniz Health Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Contributed equally
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Study on the Absorption and Conduction Properties of Vanisulfane in Tobacco. J CHEM-NY 2022. [DOI: 10.1155/2022/6249042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The purposes of this study were to explore the systemic properties of vanisulfane in tobacco plant and to provide a reference for the rational use of vanisulfane in the field. After the tobacco plants were treated by hydroponics and foliar spraying, the contents of vanisulfane in root and stem leaf were detected by high-performance liquid chromatography tandem high-resolution mass spectrometry (UPLC-HRMS), and the position of vanisulfane in root and stem leaf was real-time observed through fluorescence two-photon confocal microscope. UPLC-HRMS results showed that the contents of vanisulfane in root and stem leaf gradually increased with the extension of processing time, and after 12 h treatment, the contents of vanisulfane in root and stem leaf reached the maximum levels of 31.95 and 0.215 mg/kg, respectively. In addition, fluorescence two-photon confocal microscope results showed that vanisulfane could observe in the root and stem leaf. These results showed that vanisulfane had excellent upward and downward of systemic in tobacco plants, which is helpful to guide a reference for the rational use of vanisulfane in the field.
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Steffens S, Nahrendorf M, Madonna R. Immune cells in cardiac homeostasis and disease: emerging insights from novel technologies. Eur Heart J 2021; 43:1533-1541. [PMID: 34897403 DOI: 10.1093/eurheartj/ehab842] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 10/22/2021] [Accepted: 11/29/2021] [Indexed: 12/26/2022] Open
Abstract
The increasing use of single-cell immune profiling and advanced microscopic imaging technologies has deepened our understanding of the cardiac immune system, confirming that the heart contains a broad repertoire of innate and adaptive immune cells. Leucocytes found in the healthy heart participate in essential functions to preserve cardiac homeostasis, not only by defending against pathogens but also by maintaining normal organ function. In pathophysiological conditions, cardiac inflammation is implicated in healing responses after ischaemic or non-ischaemic cardiac injury. The aim of this review is to provide a concise overview of novel methodological advancements to the non-expert readership and summarize novel findings on immune cell heterogeneity and functions in cardiac disease with a focus on myocardial infarction as a prototypic example. In addition, we will briefly discuss how biological sex modulate the cardiac immune response. Finally, we will highlight emerging concepts for novel therapeutic applications, such as targeting immunometabolism and nanomedicine.
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Affiliation(s)
- Sabine Steffens
- Institute for Cardiovascular Prevention (IPEK), Ludwig-Maximilians-Universität, Pettenkoferstraße 9, Munich 80336, Germany.,Munich Heart Alliance, DZHK Partner Site, Munich, Germany
| | - Matthias Nahrendorf
- Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, 185 Cambridge Street, 8.228 Boston, MA 02114, USA.,Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Rosalinda Madonna
- Department of Internal Medicine, McGovern School of Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA.,Department of Pathology, Cardiology Division, University of Pisa, c/o Ospedale di Cisanello Via Paradisa, 2, 56124 Pisa, Italy
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Fluorescently Labeled PLGA Nanoparticles for Visualization In Vitro and In Vivo: The Importance of Dye Properties. Pharmaceutics 2021; 13:pharmaceutics13081145. [PMID: 34452106 PMCID: PMC8399891 DOI: 10.3390/pharmaceutics13081145] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/16/2021] [Accepted: 07/21/2021] [Indexed: 12/11/2022] Open
Abstract
Fluorescently labeled nanoparticles are widely used for evaluating their distribution in the biological environment. However, dye leakage can lead to misinterpretations of the nanoparticles' biodistribution. To better understand the interactions of dyes and nanoparticles and their biological environment, we explored PLGA nanoparticles labeled with four widely used dyes encapsulated (coumarin 6, rhodamine 123, DiI) or bound covalently to the polymer (Cy5.5.). The DiI label was stable in both aqueous and lipophilic environments, whereas the quick release of coumarin 6 was observed in model media containing albumin (42%) or liposomes (62%), which could be explained by the different affinity of these dyes to the polymer and lipophilic structures and which we also confirmed by computational modeling (log PDPPC/PLGA: DiI-2.3, Cou6-0.7). The importance of these factors was demonstrated by in vivo neuroimaging (ICON) of the rat retina using double-labeled Cy5.5/Cou6-nanoparticles: encapsulated Cou6 quickly leaked into the tissue, whereas the stably bound Cy.5.5 label remained associated with the vessels. This observation is a good example of the possible misinterpretation of imaging results because the coumarin 6 distribution creates the impression that nanoparticles effectively crossed the blood-retina barrier, whereas in fact no signal from the core material was found beyond the blood vessels.
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Álamo P, Pallarès V, Céspedes MV, Falgàs A, Sanchez JM, Serna N, Sánchez-García L, Voltà-Duràn E, Morris GA, Sánchez-Chardi A, Casanova I, Mangues R, Vazquez E, Villaverde A, Unzueta U. Fluorescent Dye Labeling Changes the Biodistribution of Tumor-Targeted Nanoparticles. Pharmaceutics 2020; 12:pharmaceutics12111004. [PMID: 33105866 PMCID: PMC7690626 DOI: 10.3390/pharmaceutics12111004] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/16/2020] [Accepted: 10/20/2020] [Indexed: 02/06/2023] Open
Abstract
Fluorescent dye labeling is a common strategy to analyze the fate of administered nanoparticles in living organisms. However, to which extent the labeling processes can alter the original nanoparticle biodistribution has been so far neglected. In this work, two widely used fluorescent dye molecules, namely, ATTO488 (ATTO) and Sulfo-Cy5 (S-Cy5), have been covalently attached to a well-characterized CXCR4-targeted self-assembling protein nanoparticle (known as T22-GFP-H6). The biodistribution of labeled T22-GFP-H6-ATTO and T22-GFP-H6-S-Cy5 nanoparticles has been then compared to that of the non-labeled nanoparticle in different CXCR4+ tumor mouse models. We observed that while parental T22-GFP-H6 nanoparticles accumulated mostly and specifically in CXCR4+ tumor cells, labeled T22-GFP-H6-ATTO and T22-GFP-H6-S-Cy5 nanoparticles showed a dramatic change in the biodistribution pattern, accumulating in non-target organs such as liver or kidney while reducing tumor targeting capacity. Therefore, the use of such labeling molecules should be avoided in target and non-target tissue uptake studies during the design and development of targeted nanoscale drug delivery systems, since their effect over the fate of the nanomaterial can lead to considerable miss-interpretations of the actual nanoparticle biodistribution.
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Affiliation(s)
- Patricia Álamo
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Josep Carreras Leukaemia Research Institute (IJC Campus Sant Pau), 08025 Barcelona, Spain
| | - Victor Pallarès
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Josep Carreras Leukaemia Research Institute (IJC Campus Sant Pau), 08025 Barcelona, Spain
| | - María Virtudes Céspedes
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
| | - Aïda Falgàs
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Josep Carreras Leukaemia Research Institute (IJC Campus Sant Pau), 08025 Barcelona, Spain
| | - Julieta M. Sanchez
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- ICTA & Cátedra de Química Biológica, Departamento de Química, Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT) (CONICET—Universidad Nacional de Córdoba), FCEFyN, UNC. Av. Velez Sarsfield 1611, X 5016GCA Córdoba, Argentina
| | - Naroa Serna
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Laura Sánchez-García
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Eric Voltà-Duràn
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Gordon A. Morris
- Department of Chemical Sciences, School of Applied Science, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK;
| | - Alejandro Sánchez-Chardi
- Servei de Microscòpia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Isolda Casanova
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Josep Carreras Leukaemia Research Institute (IJC Campus Sant Pau), 08025 Barcelona, Spain
| | - Ramón Mangues
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Josep Carreras Leukaemia Research Institute (IJC Campus Sant Pau), 08025 Barcelona, Spain
- Correspondence: (R.M.); or (A.V.); (U.U.)
| | - Esther Vazquez
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Antonio Villaverde
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Correspondence: (R.M.); or (A.V.); (U.U.)
| | - Ugutz Unzueta
- Biomedical Research Institute Sant Pau (IIB Sant Pau), Sant Antoni Mª Claret 167, 08025 Barcelona, Spain; (P.Á.); (V.P.); (M.V.C.); (A.F.); (I.C.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), C/Monforte de Lemos 3–5, 28029 Madrid, Spain; (N.S.); (L.S.-G.); (E.V.-D.); (E.V.)
- Josep Carreras Leukaemia Research Institute (IJC Campus Sant Pau), 08025 Barcelona, Spain
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Correspondence: (R.M.); or (A.V.); (U.U.)
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Etrych T, Janoušková O, Chytil P. Fluorescence Imaging as a Tool in Preclinical Evaluation of Polymer-Based Nano-DDS Systems Intended for Cancer Treatment. Pharmaceutics 2019; 11:E471. [PMID: 31547308 PMCID: PMC6781319 DOI: 10.3390/pharmaceutics11090471] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 08/29/2019] [Accepted: 09/04/2019] [Indexed: 01/04/2023] Open
Abstract
Targeted drug delivery using nano-sized carrier systems with targeting functions to malignant and inflammatory tissue and tailored controlled drug release inside targeted tissues or cells has been and is still intensively studied. A detailed understanding of the correlation between the pharmacokinetic properties and structure of the nano-sized carrier is crucial for the successful transition of targeted drug delivery nanomedicines into clinical practice. In preclinical research in particular, fluorescence imaging has become one of the most commonly used powerful imaging tools. Increasing numbers of suitable fluorescent dyes that are excitable in the visible to near-infrared (NIR) wavelengths of the spectrum and the non-invasive nature of the method have significantly expanded the applicability of fluorescence imaging. This chapter summarizes non-invasive fluorescence-based imaging methods and discusses their potential advantages and limitations in the field of drug delivery, especially in anticancer therapy. This chapter focuses on fluorescent imaging from the cellular level up to the highly sophisticated three-dimensional imaging modality at a systemic level. Moreover, we describe the possibility for simultaneous treatment and imaging using fluorescence theranostics and the combination of different imaging techniques, e.g., fluorescence imaging with computed tomography.
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Affiliation(s)
- Tomáš Etrych
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic.
| | - Olga Janoušková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Petr Chytil
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
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FÖrster resonance energy transfer (FRET)-based biosensors for biological applications. Biosens Bioelectron 2019; 138:111314. [DOI: 10.1016/j.bios.2019.05.019] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 05/08/2019] [Indexed: 12/14/2022]
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Ramos-Gomes F, Möbius W, Bonacina L, Alves F, Markus MA. Bismuth Ferrite Second Harmonic Nanoparticles for Pulmonary Macrophage Tracking. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1803776. [PMID: 30536849 DOI: 10.1002/smll.201803776] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Recently, second harmonic generation (SHG) nanomaterials have been generated that are efficiently employed in the classical (NIR) and extended (NIR-II) near infrared windows using a multiphoton microscope. The aim was to test bismuth ferrite harmonic nanoparticles (BFO-HNPs) for their ability to monitor pulmonary macrophages in mice. BFO-loaded MH-S macrophages are given intratracheally to healthy mice or BFO-HNPs are intranasally instilled in mice with allergic airway inflammation and lung sections of up to 100 μM are prepared. Using a two-photon-laser scanning microscope, it is shown that bright BFO-HNPs signals are detected from superficially localized cells as well as from deep within the lung tissue. BFO-HNPs are identified with an excellent signal-to-noise ratio and virtually no background signal. The SHG from the nanocrystals can be distinguished from the endogenous collagen-derived SHG around the blood vessels and bronchial structures. BFO-HNPs are primarily taken up by M2 alveolar macrophages in vivo. This SHG imaging approach provides novel information about the interaction of macrophages with cells and the extracellular matrix in lung disease as it is capable of visualizing and tracking NP-loaded cells at high resolution in thick tissues with minimal background fluorescence.
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Affiliation(s)
- Fernanda Ramos-Gomes
- Translational Molecular Imaging, Max-Planck Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075, Göttingen, Germany
| | - Wiebke Möbius
- Department of Neurogenetics, Max-Planck Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075, Göttingen, Germany
- Center Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany
- Electron Microscopy Core Unit, Max-Planck Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075, Göttingen, Germany
| | - Luigi Bonacina
- Department of Applied Physics, Université de Genève, 22, ch. de Pinchat, CH-1211, Geneva, Switzerland
| | - Frauke Alves
- Translational Molecular Imaging, Max-Planck Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075, Göttingen, Germany
- Clinic of Haematology and Medical Oncology, University Medicine Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- Institute of Diagnostic and Interventional Radiology, University Medicine Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany
| | - Marietta Andrea Markus
- Translational Molecular Imaging, Max-Planck Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075, Göttingen, Germany
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Cellular Uptake Mechanisms and Detection of Nanoparticle Uptake by Advanced Imaging Methods. BIOLOGICAL RESPONSES TO NANOSCALE PARTICLES 2019. [DOI: 10.1007/978-3-030-12461-8_8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10
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Arms L, Smith DW, Flynn J, Palmer W, Martin A, Woldu A, Hua S. Advantages and Limitations of Current Techniques for Analyzing the Biodistribution of Nanoparticles. Front Pharmacol 2018; 9:802. [PMID: 30154715 PMCID: PMC6102329 DOI: 10.3389/fphar.2018.00802] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 07/03/2018] [Indexed: 12/22/2022] Open
Abstract
Nanomedicines are typically submicrometer-sized carrier materials (nanoparticles) encapsulating therapeutic and/or imaging compounds that are used for the prevention, diagnosis and treatment of diseases. They are increasingly being used to overcome biological barriers in the body to improve the way we deliver compounds to specific tissues and organs. Nanomedicine technology aims to improve the balance between the efficacy and the toxicity of therapeutic compounds. Nanoparticles, one of the key technologies of nanomedicine, can exhibit a combination of physical, chemical and biological characteristics that determine their in vivo behavior. A key component in the translational assessment of nanomedicines is determining the biodistribution of the nanoparticles following in vivo administration in animals and humans. There are a range of techniques available for evaluating nanoparticle biodistribution, including histology, electron microscopy, liquid scintillation counting (LSC), indirectly measuring drug concentrations, in vivo optical imaging, computed tomography (CT), magnetic resonance imaging (MRI), and nuclear medicine imaging. Each technique has its own advantages and limitations, as well as capabilities for assessing real-time, whole-organ and cellular accumulation. This review will address the principles and methodology of each technique and their advantages and limitations for evaluating in vivo biodistribution of nanoparticles.
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Affiliation(s)
- Lauren Arms
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
| | - Doug W. Smith
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
| | - Jamie Flynn
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - William Palmer
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
- School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | - Antony Martin
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
- School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia
| | - Ameha Woldu
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Susan Hua
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia
- Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
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Visual validation of the measurement of entrapment efficiency of drug nanocarriers. Int J Pharm 2018; 547:395-403. [PMID: 29894757 DOI: 10.1016/j.ijpharm.2018.06.025] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 05/27/2018] [Accepted: 06/08/2018] [Indexed: 01/09/2023]
Abstract
Entrapment efficiency (EE) is a crucial parameter for the evaluation of nanocarriers. The accurate measurement of EE demands clear separation of nanocarriers from free drugs, which so far has not been clearly validated due to a lack of functional tools to identify nanocarriers. Herein, an environment-responsive water-quenching fluorophore was employed to label and identify model nanocarriers, polycaprolactone nanoparticles (PN), methoxy polyethylene glycol-poly(d,l-lactic acid) polymeric micelles (PM) and solid lipid nanoparticles (SLN). The separation process of three commonly used methods (centrifugation, ultrafiltration and gel permeation chromatography) was visualized by live imaging. The separation efficiency of the centrifugation method is very poor, especially for PM (40 nm), SLN (100 nm) and PN (100 nm); only PN (200 nm) can be efficiently separated but at a consumption of enormous energy. The ultrafiltration method shows the best separation efficiency with only 0.32-0.93% of leakage of the nanocarriers. Gel permeation chromatography exhibits good separation as well but suffers from low recovery, a potential factor that might compromise the accuracy of EE measurement. In conclusion, the ultrafiltration method is the method of choice for efficient separation and accurate measurement of EE.
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Tsipotan AS, Gerasimova MA, Polyutov SP, Aleksandrovsky AS, Slabko VV. Comparative Analysis of Methods for Enhancement of the Photostability of CdTe@TGA QD Colloid Solutions. J Phys Chem B 2017; 121:5876-5881. [PMID: 28564541 DOI: 10.1021/acs.jpcb.7b03166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The employment of colloid quantum dots in a number of applications is limited by their instability under light irradiation. Additional methods of photostability enhancement of UV+visible-irradiated TGA-stabilized CdTe quantum dots are investigated. Photostability enhancement was observed via either addition of sodium sulphite in the role of chemical oxygen absorber or addition of 1% gelatin, or, finally, by additional stabilization by bovine serum albumine (BSA). The latter method is the most promising, since it not only enhances the quantum dots' photostability but also makes them more biocompatible and extends the possibilities of their biological applications.
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Affiliation(s)
| | | | | | - Aleksandr S Aleksandrovsky
- Siberian Federal University , Krasnoyarsk, 660041, Russia.,Kirensky Institute of Physics, Russian Academy of Sciences , Krasnoyarsk, 660036, Russia
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13
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Varache M, Escudé M, Laffont C, Rustique E, Couffin AC. Development and validation of an HPLC-fluorescence method for the quantification of IR780-oleyl dye in lipid nanoparticles. Int J Pharm 2017; 532:779-789. [PMID: 28619458 DOI: 10.1016/j.ijpharm.2017.06.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/06/2017] [Accepted: 06/07/2017] [Indexed: 11/24/2022]
Abstract
A reversed-phase (RP) high-performance liquid chromatography (HPLC) method for the content determination of IR780-oleyl (IRO) dye in lipid nanoparticles was developed and validated. Chromatographic separation was performed on a RP C18 column with a gradient program of water and acetonitrile both with 0.1% (v/v) TFA, at a flow rate of 1.0mL/min and a total run of 21min. IRO dye detection was made by fluorescence at emission wavelength of 773nm (excitation wavelength: 744nm). According to ICH guidelines, the developed method was shown to be specific, linear in the range 3-8μg/mL (R2=0.9998), precise at the intra-day and inter-day levels as reflected by the coefficient of variation (CV≤1.98%) at three different concentrations (4, 6 and 8 μg/mL) and accurate, with recovery rates between 98.2-101.6% and 99.2-100.5%. The detection and quantitation limits were 0.41 and 1.24μg/mL, respectively. Stability studies of sample processing showed that IRO dye was stable after 24h in the autosampler or after three freeze/thaw cycles. Combined with fluorescence measurements, the developed method was successfully applied to optimize the loading capacity of IRO dye in the core of lipid nanoparticles.
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Affiliation(s)
- Mathieu Varache
- CEA-LETI, Microtechnologies for Biology and Healthcare Division, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France; Université Grenoble Alpes, 38000 Grenoble, France
| | - Marie Escudé
- CEA-LETI, Microtechnologies for Biology and Healthcare Division, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France; Université Grenoble Alpes, 38000 Grenoble, France
| | - Corentin Laffont
- CEA-LETI, Microtechnologies for Biology and Healthcare Division, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France; Université Grenoble Alpes, 38000 Grenoble, France
| | - Emilie Rustique
- CEA-LETI, Microtechnologies for Biology and Healthcare Division, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France; Université Grenoble Alpes, 38000 Grenoble, France
| | - Anne-Claude Couffin
- CEA-LETI, Microtechnologies for Biology and Healthcare Division, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France; Université Grenoble Alpes, 38000 Grenoble, France.
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14
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Abstract
The fields of biomedical nanotechnology and theranostics have enjoyed exponential growth in recent years. The "Molecular Imaging in Nanotechnology and Theranostics" (MINT) Interest Group of the World Molecular Imaging Society (WMIS) was created in order to provide a more organized and focused forum on these topics within the WMIS and at the World Molecular Imaging Conference (WMIC). The interest group was founded in 2015 and was officially inaugurated during the 2016 WMIC. The overarching goal of MINT is to bring together the many scientists who work on molecular imaging approaches using nanotechnology and those that work on theranostic agents. MINT therefore represents scientists, labs, and institutes that are very diverse in their scientific backgrounds and areas of expertise, reflecting the wide array of materials and approaches that drive these fields. In this short review, we attempt to provide a condensed overview over some of the key areas covered by MINT. Given the breadth of the fields and the given space constraints, we have limited the coverage to the realm of nanoconstructs, although theranostics is certainly not limited to this domain. We will also focus only on the most recent developments of the last 3-5 years, in order to provide the reader with an intuition of what is "in the pipeline" and has potential for clinical translation in the near future.
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Affiliation(s)
- Chrysafis Andreou
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Suchetan Pal
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Lara Rotter
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Jiang Yang
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Moritz F Kircher
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA.
- Center for Molecular Imaging and Nanotechnology (CMINT), Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA.
- Department of Radiology, Weill Cornell Medical College, New York, NY, 10065, USA.
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Tang J, Pérez-Medina C, Zhao Y, Sadique A, Mulder WJM, Reiner T. A Comprehensive Procedure to Evaluate the In Vivo Performance of Cancer Nanomedicines. J Vis Exp 2017. [PMID: 28287606 DOI: 10.3791/55271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Inspired by the success of previous cancer nanomedicines in the clinic, researchers have generated a large number of novel formulations in the past decade. However, only a small number of nanomedicines have been approved for clinical use, whereas the majority of nanomedicines under clinical development have produced disappointing results. One major obstacle to the successful clinical translation of new cancer nanomedicines is the lack of an accurate understanding of their in vivo performance. This article features a rigorous procedure to characterize the in vivo behavior of nanomedicines in tumor-bearing mice at systemic, tissue, single-cell, and subcellular levels via the integration of positron emission tomography-computed tomography (PET-CT), radioactivity quantification methods, flow cytometry, and fluorescence microscopy. Using this approach, researchers can accurately evaluate novel nanoscale formulations in relevant mouse models of cancer. These protocols may have the ability to identify the most promising cancer nanomedicines with high translational potential or to aid in the optimization of cancer nanomedicines for future translation.
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Affiliation(s)
- Jun Tang
- Department of Radiology, Memorial Sloan Kettering Cancer Center;
| | - Carlos Pérez-Medina
- Department of Radiology, Memorial Sloan Kettering Cancer Center; Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai
| | - Yiming Zhao
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai
| | - Ahmad Sadique
- Department of Radiology, Memorial Sloan Kettering Cancer Center
| | - Willem J M Mulder
- Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai
| | - Thomas Reiner
- Department of Radiology, Memorial Sloan Kettering Cancer Center
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