Correlative two-photon and serial block face scanning electron microscopy in neuronal tissue using 3D near-infrared branding maps. 2017

Robert M Lees, and Christopher J Peddie, and Lucy M Collinson, and Michael C Ashby, and Paul Verkade
University of Bristol, Bristol, United Kingdom.

Linking cellular structure and function has always been a key goal of microscopy, but obtaining high resolution spatial and temporal information from the same specimen is a fundamental challenge. Two-photon (2P) microscopy allows imaging deep inside intact tissue, bringing great insight into the structural and functional dynamics of cells in their physiological environment. At the nanoscale, the complex ultrastructure of a cell's environment in tissue can be reconstructed in three dimensions (3D) using serial block face scanning electron microscopy (SBF-SEM). This provides a snapshot of high resolution structural information pertaining to the shape, organization, and localization of multiple subcellular structures at the same time. The pairing of these two imaging modalities in the same specimen provides key information to relate cellular dynamics to the ultrastructural environment. Until recently, approaches to relocate a region of interest (ROI) in tissue from 2P microscopy for SBF-SEM have been inefficient or unreliable. However, near-infrared branding (NIRB) overcomes this by using the laser from a multiphoton microscope to create fiducial markers for accurate correlation of 2P and electron microscopy (EM) imaging volumes. The process is quick and can be user defined for each sample. Here, to increase the efficiency of ROI relocation, multiple NIRB marks are used in 3D to target ultramicrotomy. A workflow is described and discussed to obtain a data set for 3D correlated light and electron microscopy, using three different preparations of brain tissue as examples.

UI MeSH Term Description Entries
D007259 Infrared Rays That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants. Heat Waves,Heat Wave,Infrared Ray,Ray, Infrared,Rays, Infrared,Wave, Heat,Waves, Heat
D008855 Microscopy, Electron, Scanning Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY. Scanning Electron Microscopy,Electron Scanning Microscopy,Electron Microscopies, Scanning,Electron Microscopy, Scanning,Electron Scanning Microscopies,Microscopies, Electron Scanning,Microscopies, Scanning Electron,Microscopy, Electron Scanning,Microscopy, Scanning Electron,Scanning Electron Microscopies,Scanning Microscopies, Electron,Scanning Microscopy, Electron
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D016610 Tissue Embedding The technique of placing cells or tissue in a supporting medium so that thin sections can be cut using a microtome. The medium can be paraffin wax (PARAFFIN EMBEDDING) or plastics (PLASTIC EMBEDDING) such as epoxy resins. Embedding, Tissue
D017785 Photons Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)
D057918 Fiducial Markers Materials used as reference points for imaging studies. Anatomic Fiducials,Fiducial Targets,Implanted Fiducials,Anatomic Fiducial,Fiducial Marker,Fiducial Target,Fiducial, Anatomic,Fiducial, Implanted,Fiducials, Anatomic,Fiducials, Implanted,Implanted Fiducial,Marker, Fiducial,Markers, Fiducial,Target, Fiducial,Targets, Fiducial
D021621 Imaging, Three-Dimensional The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object. Computer-Assisted Three-Dimensional Imaging,Imaging, Three-Dimensional, Computer Assisted,3-D Image,3-D Imaging,Computer-Generated 3D Imaging,Three-Dimensional Image,Three-Dimensional Imaging, Computer Generated,3 D Image,3 D Imaging,3-D Images,3-D Imagings,3D Imaging, Computer-Generated,3D Imagings, Computer-Generated,Computer Assisted Three Dimensional Imaging,Computer Generated 3D Imaging,Computer-Assisted Three-Dimensional Imagings,Computer-Generated 3D Imagings,Image, 3-D,Image, Three-Dimensional,Images, 3-D,Images, Three-Dimensional,Imaging, 3-D,Imaging, Computer-Assisted Three-Dimensional,Imaging, Computer-Generated 3D,Imaging, Three Dimensional,Imagings, 3-D,Imagings, Computer-Assisted Three-Dimensional,Imagings, Computer-Generated 3D,Imagings, Three-Dimensional,Three Dimensional Image,Three Dimensional Imaging, Computer Generated,Three-Dimensional Images,Three-Dimensional Imaging,Three-Dimensional Imaging, Computer-Assisted,Three-Dimensional Imagings,Three-Dimensional Imagings, Computer-Assisted

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