Protocols in Current Issue
    Rapid Nickel-based Isolation of Extracellular Vesicles from Different Biological Fluids
    [Abstract] Extracellular vesicles (EVs) are membranous structures that cells massively release in extracellular fluids. EVs are cargo of cellular components such as lipids, proteins, and nucleic acids that can work as a formidable source in liquid biopsy studies searching for disease biomarkers. We recently demonstrated that nickel-based isolation (NBI) is a ...
    Automated Analysis of Cell Surface Ruffling: Ruffle Quantification Macro
    Authors:  Nicholas D. Condon, Jennifer L. Stow and Adam A. Wall, date: 01/20/2020, view: 255, Q&A: 0
    [Abstract] Cell surface protrusions include F-actin rich, wave-like ruffles that are erected transiently in response to stimuli and during cell migration. Macrophages are innate immune cells that ruffle constitutively and more dramatically in cells activated by pathogens. Dorsal ruffles and their resulting macropinosomes are key sites for environmental ...
    Quantification of Nitric Oxide and Reactive Oxygen Species in Leishmania-infected J774A.1 Macrophages as a Response to the in vitro Treatment with a Natural Product Compound
    Authors:  Kalliopi Karampetsou, Olga S. Koutsoni and Eleni Dotsika, date: 12/05/2019, view: 440, Q&A: 0
    [Abstract] Leishmaniasis is a parasitic disease caused by the obligatory intracellular protozoa Leishmania spp. Current therapeutic options are limited and thus, drug discovery against leishmaniasis is very important. Nevertheless, there is a great difficulty to develop therapeutic strategies against the disease because the parasite deploys various ...
    Mapping the Mechanome–A Protocol for Simultaneous Live Imaging and Quantitative Analysis of Cell Mechanoadaptation and Ingression
    [Abstract] Mechanomics, the mechanics equivalent of genomics, is a burgeoning field studying mechanical modulation of stem cell behavior and lineage commitment. Analogous to mechanical testing of a living material as it adapts and evolves, mapping of the mechanome necessitates the development of new protocols to assess changes in structure and function in ...
    Differentiation of Mouse Embryonic Stem Cells to Neuronal Cells Using Hanging Droplets and Retinoic Acid
    Authors:  Jeroen Witteveldt and Sara Macias, date: 11/05/2019, view: 563, Q&A: 0
    [Abstract] Controlled differentiation of embryonic stem cells is an essential tool in stem cell research. In this protocol, we describe a simple differentiation protocol involving the induction of embryoid body formation in mouse embryonic stem cells (mESC) using hanging droplets, followed by differentiation into a neuronal lineage.
    Quantitation of TLR4 Internalization in Response to LPS in Thioglycollate Elicited Peritoneal Mouse Macrophages by Flow Cytometry
    Authors:  Katharina Richard, Stefanie N. Vogel and Darren J. Perkins, date: 09/20/2019, view: 588, Q&A: 0
    [Abstract] Internalization of cell surface Toll-like Receptor 4 (TLR4) is a convenient read-out to measure LPS dependent activation of the TRIF adaptor pathway. We here provide a protocol to quantify the LPS dependent internalization of TLR4 using thioglycollate-elicited peritoneal macrophages by flow cytometry.
    Three-dimensional Reconstruction and Quantification of Proteins and mRNAs at the Single-cell Level in Cultured Cells
    Authors:  Xueer Jiang, Ingrid Brust-Mascher and Li-En Jao, date: 08/20/2019, view: 1130, Q&A: 0
    [Abstract] Gene expression is often regulated by the abundance, localization, and translation of mRNAs in both space and time. Being able to visualize mRNAs and protein products in single cells is critical to understand this regulatory process. The development of single-molecule RNA fluorescence in situ hybridization (smFISH) allows the detection of ...
    A Flow Cytometric Method to Determine Transfection Efficiency
    [Abstract] Mammalian cell transfection is a powerful technique commonly used in molecular biology to express exogenous DNA or RNA in cells and study gene and protein function. Although several transfection strategies have been developed, there is a wide variation with regards to transfection efficiency, cell toxicity and reproducibility. Thus, a sensitive ...
    Induced Germinal Center B Cell Culture System
    Authors:  Kei Haniuda and Daisuke Kitamura, date: 02/20/2019, view: 3698, Q&A: 0
    [Abstract] The germinal center (GC) is the site where B cells undergo clonal expansion, affinity-based selection, and differentiation into memory B cells or plasma cells. It has been difficult to elucidate regulatory mechanisms for the dynamic GC B cell maturation and differentiation, partly because experimental manipulation of GC B cells in vivo ...
    Isolation of Chromatin-bound Proteins from Subcellular Fractions for Biochemical Analysis
    Author:  Sébastien Gillotin, date: 10/05/2018, view: 6946, Q&A: 3
    [Abstract] Shuttling of proteins between different cellular compartments controls their proteostasis and can contribute in some cases to regulate their activity. Biochemical analysis of chromatin-bound proteins, such as transcription factors, is often difficult because of their low yield and due to the interference from nucleic acids. This protocol describes ...

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