Cell Biology

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    Protocols in Current Issue
    A Workflow for High-pressure Freezing and Freeze Substitution of the Caenorhabditis elegans Embryo for Ultrastructural Analysis by Conventional and Volume Electron Microscopy
    Authors:  Mohammad M. Rahman, Irene Y. Chang, Orna Cohen-Fix and Kedar Narayan, date: 04/05/2021, view: 127, Q&A: 0
    [Abstract]

    The free-living nematode Caenorhabditis elegans is a popular model system for studying developmental biology. Here we describe a detailed protocol to high-pressure freeze the C. elegans embryo (either ex vivo after dissection, or within the intact worm) followed by quick freeze substitution. Processed samples are suitable for ultrastructural

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    Retention Using Selective Hooks (RUSH) Cargo Sorting Assay for Live-cell Vesicle Tracking in the Secretory Pathway Using HeLa Cells
    Authors:  Mehrshad Pakdel, Natalia Pacheco-Fernandez and Julia von Blume, date: 03/20/2021, view: 714, Q&A: 0
    [Abstract]

    More than 30% of the total amount of proteins synthesized in mammalian cells follow the secretory pathway in order to mature and be properly sorted to their final destinations. Among several methodologies that describe live-cell monitoring of vesicles, the Retention Using Selective Hooks (RUSH) system is a powerful one that allows to visualize

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    Investigate Synaptic Vesicles Mobility in Neuronal Culture Axons by FRAP Imaging
    Authors:  Xiao Min Zhang, Fabrice P. Cordelieres and Etienne Herzog, date: 03/20/2021, view: 523, Q&A: 0
    [Abstract]

    Synaptic vesicles (SVs) are clustered in the presynaptic terminals and consistently trafficking along axons. Based on their release features, SVs are classified into different “pools”. Imaging of SVs that are traveling among multiple presynaptic terminals has helped define a new pool named “SV super-pool”. Here we describe

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    Retention Using Selective Hooks (RUSH) Cargo Sorting Assay for Protein Vesicle Tracking in HeLa Cells
    Authors:  Natalia Pacheco-Fernandez, Mehrshad Pakdel and Julia von Blume, date: 03/05/2021, view: 1040, Q&A: 0
    [Abstract]

    Monitoring vesicle trafficking is an excellent tool for the evaluation of protein dynamics in living cells. Such study is key for the understanding of protein sorting and secretion. Recent developments in microscopy, as well as new methodologies developed to study synchronized trafficking of proteins, allowed a better understanding of signaling,

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    Live Intravital Intestine with Blood Flow Visualization in Neonatal Mice Using Two-photon Laser Scanning Microscopy
    [Abstract]

    This protocol describes a novel technique to investigate the microcirculation dynamics underlying the pathology in the small intestine of neonatal mice using two-photon laser-scanning microscopy (TPLSM). Recent technological advances in multi-photon microscopy allow intravital analysis of different organs such as the liver, brain and intestine.

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    Generation and Implementation of Reporter BHK-21 Cells for Live Imaging of Flavivirus Infection
    Authors:  Jorge L. Arias-Arias and Rodrigo Mora-Rodríguez, date: 03/05/2021, view: 452, Q&A: 0
    [Abstract]

    The genus Flavivirus within the family Flaviviridae includes many viral species of medical importance, such as yellow fever virus (YFV), Zika virus (ZIKV), and dengue virus (DENV), among others. Presently, the identification of flavivirus-infected cells is based on either the immunolabeling of viral proteins, the application of recombinant

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    An Imaging Flow Cytometry Method to Measure Citrullination of H4 Histone as a Read-out for Neutrophil Extracellular Traps Formation
    Authors:  Emilia A. Barbu, Venina M. Dominical, Laurel Mendelsohn and Swee Lay Thein, date: 02/20/2021, view: 828, Q&A: 0
    [Abstract]

    The formation of neutrophil extracellular traps (NETs) is thought to play a critical role in infections and propagating sterile inflammation. Histone citrullination is an essential and early step in NETs formation, detectable prior to the formation of the hallmark extracellular DNA-scaffolded strands. In addition to the classical microscopy

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    Live Cell FRET Analysis of the Conformational Changes of Human P-glycoprotein
    Authors:  Ryota Futamata, Noriyuki Kioka and Kazumitsu Ueda, date: 02/20/2021, view: 1029, Q&A: 0
    [Abstract]

    The molecular mechanisms of P-glycoprotein (P-gp; also known as MDR1 or ABCB1) have been mainly investigated using artificial membranes such as lipid-detergent mixed micelles, artificial lipid bilayers, and membrane vesicles derived from cultured cells. Although these in vitro experiments help illustrate details about the molecular mechanisms of

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    Immuno-electrophysiology on Neuromuscular Junctions of Drosophila Third Instar Larva
    Authors:  Raffaella Klima, Giulia Romano, Monsurat Gbadamosi, Aram Megighian and Fabian Feiguin, date: 02/05/2021, view: 356, Q&A: 0
    [Abstract]

    Alterations in synaptic transmission are critical early events in neuromuscular disorders. However, reliable methodologies to analyze the functional organization of the neuromuscular synapses are still needed. This manuscript provides a detailed protocol to analyze the molecular assembly of the neuromuscular synapses through

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    Imaging of Human Cancer Cells in 3D Collagen Matrices
    Authors:  Karin Pfisterer, Brooke Lumicisi and Maddy Parsons, date: 01/20/2021, view: 1182, Q&A: 0
    [Abstract]

    Research on cell migration and interactions with the extracellular matrix (ECM) was mostly focused on 2D surfaces in the past. Many recent studies have highlighted differences in migratory behaviour of cells on 2D surfaces compared to complex cell migration modes in 3D environments. When embedded in 3D matrices, cells constantly sense the

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