ArticleBio-protocol2021
Electron Tomography to Study the Three-dimensional Structure of the Reovirus Egress Pathway in Mammalian Cells.
Article in Bio-protocol, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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0 citing papers in PubMed, 2 citations in OpenAlex.
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Authors and funding
4 authors at 4 institutions in 3 countries.
Funding
Abstract
Mammalian orthoreoviruses (reoviruses) are nonenveloped, double-stranded RNA viruses that replicate and assemble in cytoplasmic membranous organelles called viral inclusions (VIs). To define the cellular compartments involved in nonlytic reovirus egress, we imaged viral egress in infected, nonpolarized human brain microvascular endothelial cells (HBMECs). Electron and confocal microscopy showed that reovirus mature virions are recruited from VIs to modified lysosomes termed sorting organelles (SOs). Later in infection, membranous carriers (MCs) emerge from SOs and transport new virions to the plasma membrane for nonlytic egress. Transmission electron microscopy (TEM) combined with electron tomography (ET) and three-dimensional (3D) reconstruction revealed that these compartments are connected and form the exit pathway. Connections are established by channels through which mature virions are transported from VIs to MCs. In the last step, MCs travel across the cytoplasm and fuse with the plasma membrane, which facilitates reovirus egress. This bio-protocol describes the combination of imaging approaches (TEM, ET, and 3D reconstruction) to analyze reovirus egress zones. The spatial information present in the 3D reconstructions, along with the higher resolution relative to 2D projections, allowed us to identify components of a new nonlytic viral egress pathway.
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