1. In situ fiducial markers for 3D correlative cryo-fluorescence and FIB-SEM imaging
- Author
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Perrine Paul-Gilloteaux, Katya Rechav, Nadav Scher, Ori Avinoam, Weizmann Institute of Science [Rehovot, Israël], Structure fédérative de recherche François Bonamy (SFR François Bonamy), Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche en Santé de l'Université de Nantes (IRS-UN), unité de recherche de l'institut du thorax UMR1087 UMR6291 (ITX), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), ANR-18-CE45-0015,CROCOVAL,Recalage transmodal en microscopies corrélatives pour la caractérisation physiopathologique de la valvulopathie(2018), Paul-Gilloteaux, Perrine, APPEL À PROJETS GÉNÉRIQUE 2018 - Recalage transmodal en microscopies corrélatives pour la caractérisation physiopathologique de la valvulopathie - - CROCOVAL2018 - ANR-18-CE45-0015 - AAPG2018 - VALID, and Unité de recherche de l'institut du thorax (ITX-lab)
- Subjects
0301 basic medicine ,In situ ,Correlative ,Cell biology ,Materials science ,Scanning electron microscope ,[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging ,Science ,02 engineering and technology ,Focused ion beam ,Article ,Technical aspects of cell biology ,03 medical and health sciences ,[INFO.INFO-CV] Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV] ,Fluorescence microscope ,Multidisciplinary ,Nuclear organization ,[INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV] ,021001 nanoscience & nanotechnology ,Fluorescence ,3. Good health ,030104 developmental biology ,[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging ,[INFO.INFO-TI] Computer Science [cs]/Image Processing [eess.IV] ,[INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV] ,0210 nano-technology ,Fiducial marker ,Structural biology ,Biomedical engineering - Abstract
Summary Imaging of cells and tissues has improved significantly over the last decade. Dual-beam instruments with a focused ion beam mounted on a scanning electron microscope (FIB-SEM), offering high-resolution 3D imaging of large volumes and fields-of-view are becoming widely used in the life sciences. FIB-SEM has most recently been implemented on fully hydrated, cryo-immobilized, biological samples. Correlative light and electron microscopy workflows combining fluorescence microscopy (FM) with FIB-SEM imaging exist, whereas workflows combining cryo-FM and cryo-FIB-SEM imaging are not yet commonly available. Here, we demonstrate that fluorescently labeled lipid droplets can serve as in situ fiducial markers for correlating cryo-FM and FIB-SEM datasets and that this approach can be used to target the acquisition of large FIB-SEM stacks spanning tens of microns under cryogenic conditions. We also show that cryo-FIB-SEM imaging is particularly informative for questions related to organelle structure and inter-organellar contacts, nuclear organization, and mineral deposits in cells., Graphical abstract, Highlights • 3D CLEM of cryo-FM and FIB-SEM datasets using fluorescently labeled lipid droplets • Cryo-FIB-SEM imaging of organelle-organelle interactions and nuclear organization, Cell biology; Technical aspects of cell biology; Structural biology
- Published
- 2021
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