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Vernet H, Fullana AM, Sorribas FJ, Gualda EJ. Development of Microscopic Techniques for the Visualization of Plant–Root-Knot Nematode Interaction. PLANTS 2022; 11:plants11091165. [PMID: 35567165 PMCID: PMC9104198 DOI: 10.3390/plants11091165] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 11/16/2022]
Abstract
Plant-parasitic nematodes are a significant cause of yield losses and food security issues. Specifically, nematodes of the genus Meloidogyne can cause significant production losses in horticultural crops around the world. Understanding the mechanisms of the ever-changing physiology of plant roots by imaging the galls induced by nematodes could provide a great insight into their control. However, infected roots are unsuitable for light microscopy investigation due to the opacity of plant tissues. Thus, samples must be cleared to visualize the interior of whole plants in order to make them transparent using clearing agents. This work aims to identify which clearing protocol and microscopy system is the most appropriate to obtain 3D images of tomato cv. Durinta and eggplant cv. Cristal samples infected with Meloidogyne incognita to visualize and study the root–nematode interaction. To that extent, two clearing solutions (BABB and ECi), combined with three different dehydration solvents (ethanol, methanol and 1-propanol), are tested. In addition, the advantages and disadvantages of alternative imaging techniques to confocal microscopy are analyzed by employing an experimental custom-made setup that combines two microscopic techniques, light sheet fluorescence microscopy and optical projection tomography, on a single instrument.
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Abstract
Light-Sheet Fluorescence Microscopy has recently emerged as the technique of choice for obtaining high quality three-dimensional (3D) images of whole organisms, with low photo-damage and fast acquisition rates. Unlike conventional optical and confocal microscopy or scanning electron microscopy systems, it offers the possibility of obtaining multiple views of the sample by rotating it. We show that the use of light-sheet fluorescence microscopy, for the analysis of invertebrates, provides a fair compromise compared to scanning electron microscopy in terms of resolution, but avoids some of its drawbacks, such as sample preparation or limited three-dimensional perspectives. In this paper, we will show how LSFM techniques can provide a cheap, high quality, multicolor, 3D alternative to classic microscopes, for the study of the morphological structure of insects and invertebrates in morphogenesis studies of the whole animal.
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Ovečka M, von Wangenheim D, Tomančák P, Šamajová O, Komis G, Šamaj J. Multiscale imaging of plant development by light-sheet fluorescence microscopy. NATURE PLANTS 2018; 4:639-650. [PMID: 30185982 DOI: 10.1038/s41477-018-0238-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 07/31/2018] [Indexed: 05/21/2023]
Abstract
Light-sheet fluorescence microscopy (LSFM) methods collectively represent the major breakthrough in developmental bio-imaging of living multicellular organisms. They are becoming a mainstream approach through the development of both commercial and custom-made LSFM platforms that are adjusted to diverse biological applications. Based on high-speed acquisition rates under conditions of low light exposure and minimal photo-damage of the biological sample, these methods provide ideal means for long-term and in-depth data acquisition during organ imaging at single-cell resolution. The introduction of LSFM methods into biology extended our understanding of pattern formation and developmental progress of multicellular organisms from embryogenesis to adult body. Moreover, LSFM imaging allowed the dynamic visualization of biological processes under almost natural conditions. Here, we review the most important, recent biological applications of LSFM methods in developmental studies of established and emerging plant model species, together with up-to-date methods of data editing and evaluation for modelling of complex biological processes. Recent applications in animal models push LSFM into the forefront of current bio-imaging approaches. Since LSFM is now the single most effective method for fast imaging of multicellular organisms, allowing quantitative analyses of their long-term development, its broader use in plant developmental biology will likely bring new insights.
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Affiliation(s)
- Miroslav Ovečka
- Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University Olomouc, Olomouc, Czech Republic
| | - Daniel von Wangenheim
- Plant Sciences Division, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, UK
| | - Pavel Tomančák
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Olga Šamajová
- Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University Olomouc, Olomouc, Czech Republic
| | - George Komis
- Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University Olomouc, Olomouc, Czech Republic
| | - Jozef Šamaj
- Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University Olomouc, Olomouc, Czech Republic.
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Baroux C, Schubert V. Technical Review: Microscopy and Image Processing Tools to Analyze Plant Chromatin: Practical Considerations. Methods Mol Biol 2018; 1675:537-589. [PMID: 29052212 DOI: 10.1007/978-1-4939-7318-7_31] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
In situ nucleus and chromatin analyses rely on microscopy imaging that benefits from versatile, efficient fluorescent probes and proteins for static or live imaging. Yet the broad choice in imaging instruments offered to the user poses orientation problems. Which imaging instrument should be used for which purpose? What are the main caveats and what are the considerations to best exploit each instrument's ability to obtain informative and high-quality images? How to infer quantitative information on chromatin or nuclear organization from microscopy images? In this review, we present an overview of common, fluorescence-based microscopy systems and discuss recently developed super-resolution microscopy systems, which are able to bridge the resolution gap between common fluorescence microscopy and electron microscopy. We briefly present their basic principles and discuss their possible applications in the field, while providing experience-based recommendations to guide the user toward best-possible imaging. In addition to raw data acquisition methods, we discuss commercial and noncommercial processing tools required for optimal image presentation and signal evaluation in two and three dimensions.
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Affiliation(s)
- Célia Baroux
- Department of Plant and Microbial Biology, Zürich-Basel Plant Science Center, University of Zürich, Zollikerstrasse 107, 8008, Zürich, Switzerland.
| | - Veit Schubert
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, 06466, Seeland, Germany
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Schmohl KA, Müller AM, Wechselberger A, Rühland S, Salb N, Schwenk N, Heuer H, Carlsen J, Göke B, Nelson PJ, Spitzweg C. Thyroid hormones and tetrac: new regulators of tumour stroma formation via integrin αvβ3. Endocr Relat Cancer 2015; 22:941-52. [PMID: 26307023 DOI: 10.1530/erc-15-0245] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/25/2015] [Indexed: 12/18/2022]
Abstract
To improve our understanding of non-genomic, integrin αvβ3-mediated thyroid hormone action in tumour stroma formation, we examined the effects of triiodo-l-thyronine (T3), l-thyroxine (T4) and integrin-specific inhibitor tetrac on differentiation, migration and invasion of mesenchymal stem cells (MSCs) that are an integral part of the tumour's fibrovascular network. Primary human bone marrow-derived MSCs were treated with T3 or T4 in the presence of hepatocellular carcinoma (HCC) cell-conditioned medium (CM), which resulted in stimulation of the expression of genes associated with cancer-associated fibroblast-like differentiation as determined by qPCR and ELISA. In addition, T3 and T4 increased migration of MSCs towards HCC cell-CM and invasion into the centre of three-dimensional HCC cell spheroids. All these effects were tetrac-dependent and therefore integrin αvβ3-mediated. In a subcutaneous HCC xenograft model, MSCs showed significantly increased recruitment and invasion into tumours of hyperthyroid mice compared to euthyroid and, in particular, hypothyroid mice, while treatment with tetrac almost completely eliminated MSC recruitment. These studies significantly improve our understanding of the anti-tumour activity of tetrac, as well as the mechanisms that regulate MSC differentiation and recruitment in the context of tumour stroma formation, as an important prerequisite for the utilisation of MSCs as gene delivery vehicles.
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MESH Headings
- Angiogenesis Inhibitors/pharmacology
- Angiogenesis Inhibitors/therapeutic use
- Animals
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Differentiation/drug effects
- Cell Line, Tumor
- Cell Lineage
- Cell Movement
- Culture Media, Conditioned
- Heterografts
- Humans
- Hyperthyroidism/chemically induced
- Hyperthyroidism/complications
- Hypothyroidism/chemically induced
- Hypothyroidism/complications
- Integrin alphaVbeta3/physiology
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Liver Neoplasms, Experimental/complications
- Liver Neoplasms, Experimental/pathology
- Male
- Mesenchymal Stem Cells/drug effects
- Mice
- Mice, Nude
- Neoplasm Invasiveness
- Neoplasm Proteins/physiology
- Neovascularization, Pathologic/drug therapy
- Neovascularization, Pathologic/physiopathology
- Specific Pathogen-Free Organisms
- Spheroids, Cellular
- Stromal Cells/pathology
- Thyroxine/analogs & derivatives
- Thyroxine/pharmacology
- Thyroxine/therapeutic use
- Thyroxine/toxicity
- Triiodothyronine/pharmacology
- Triiodothyronine/therapeutic use
- Triiodothyronine/toxicity
- Tumor Microenvironment
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Kathrin A Schmohl
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Andrea M Müller
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Alexandra Wechselberger
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Svenja Rühland
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Nicole Salb
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Nathalie Schwenk
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Heike Heuer
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Janette Carlsen
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Burkhard Göke
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Peter J Nelson
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
| | - Christine Spitzweg
- Department of Internal Medicine IIUniversity Hospital of Munich, Munich, GermanyMedizinische Klinik und Poliklinik IVUniversity Hospital of Munich, Munich, GermanyDepartment of Biology IILudwig-Maximilians-University, Munich, GermanyLeibniz Institute for Environmental MedicineDüsseldorf, GermanyDepartment of Nuclear MedicineUniversity Hospital of Munich, Munich, GermanyUniversity Medical Center Hamburg-EppendorfHamburg, Germany
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