Cell Biology

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    Protocols in Current Issue
    Buoyant Density Fractionation of Small Extracellular Vesicle Sub-populations Derived from Mammalian Cells
    Authors:  Morayma M. Temoche-Diaz, Matthew J. Shurtleff and Randy Schekman, date: 08/05/2020, view: 73, Q&A: 0
    [Abstract] Small extracellular vesicles (sEVs) encompass a variety of distinct vesicles that are secreted to the extracellular space. Many methodologies currently used for EV isolation (e.g., differential ultracentrifugation concluding in a high-speed pellet, precipitation by macromolecular crowding agents or size excusion chromatography–SEC) do not ...
    Extracellular Vesicles Tracking and Quantification Using CT and Optical Imaging in Rats
    [Abstract] Exosomes, a subtype of extracellular vesicles, are nanovesicles of endocytic origin. Exosomes contain a plethora of proteins, lipids, and genetic materials of parent cells to facilitate intercellular communications. Tracking exosomes in vivo is fundamentally important to understand their biodistribution pattern and the mechanism of ...
    Isolating Multiple Extracellular Vesicles Subsets, Including Exosomes and Membrane Vesicles, from Bovine Milk Using Sodium Citrate and Differential Ultracentrifugation
    Authors:  Abderrahim Benmoussa, Sara Michel, Caroline Gilbert and Patrick Provost, date: 06/05/2020, view: 1044, Q&A: 0
    [Abstract] Milk is a complex fluid that contains various types of proteins and extracellular vesicles (EVs). Some proteins can mingle with EVs, and interfere with their isolation. Among these proteins, caseins form micelles of a size comparable to milk EVs, and can thus be co-isolated with EVs. Preliminary steps that affect milk are crucial for EV isolation ...
    Isolation and Characterization of Exosomes from Mouse Feces
    Authors:  Chunhua Yang, Mingzhen Zhang, Junsik Sung, Lixin Wang, Yunjin Jung and Didier Merlin, date: 04/20/2020, view: 1215, Q&A: 0
    [Abstract] Exosomes secreted by colonic epithelial cells are present in feces and contain valuable epigenetic information, such as miRNAs, proteins, and metabolites. An in-depth study of this information is conducive to the diagnosis or treatment of relevant diseases. A crucial prerequisite of such a study is to establish an efficient isolation method, ...
    Isolation, Purification and Characterization of Exosomes from Fibroblast Cultures of Skeletal Muscle
    Authors:  Diantha van de Vlekkert, Xiaohui Qiu, Ida Annunziata and Alessandra d'Azzo, date: 04/05/2020, view: 908, Q&A: 0
    [Abstract] Exosomes are dynamic nanovesicles secreted by virtually all cells and are present in all biological fluids. Given their highly heterogeneous content exosomes have been implicated in many physiological and pathological processes that they exert by influencing cell-cell and cell-ECM communication. In recent years an increasing number of methods have ...
    Isolation of Exosomes from Semen for in vitro Uptake and HIV-1 Infection Assays
    Authors:  Marisa N. Madison, Jennifer L. Welch and Chioma M. Okeoma, date: 04/05/2017, view: 7406, Q&A: 0
    [Abstract] Exosomes are membranous extracellular nanovesicles of endocytic origin. Exosomes are known to carry host and pathogen-derived genomic, proteomic, lipidomic cargos and other extraneous molecules. Exosomes are secreted by diverse cell types into the extracellular milieu and are subsequently internalized by recipient neighboring or distal cells. Upon ...
    Quantitative Analysis of Exosome Secretion Rates of Single Cells
    Authors:  Yu-Jui Chiu, Wei Cai, Tiffany Lee, Julia Kraimer and Yu-Hwa Lo, date: 02/20/2017, view: 8548, Q&A: 0
    [Abstract] To study the inhomogeneity within a cell population including exosomes properties such as exosome secretion rate of cells and surface markers carried by exosomes, we need to quantify and characterize those exosomes secreted by each individual cell. Here we develop a method to collect and analyze exosomes secreted by an array of single cells using ...
    Purification and Fluorescent Labeling of Exosomes
    Authors:  Asuka Nanbo, Eri Kawanishi, Ryuji Yoshida and Hironori Yoshiyama, date: 04/20/2014, view: 15876, Q&A: 0
    [Abstract] Exosomes are small membrane vesicles of endocytic origin secreted into the extracellular environment from a variety of different cells, and are thought to play important roles in intercellular communications. Here, we provide a useful protocol to purify the exosomes released from cell lines using sucrose gradient centrifugation. In this protocol, ...



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