Cell Biology

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    Quantification of Mouse Hematopoietic Progenitors’ Formation Using Time-lapse Microscopy and Image Analysis
    [Abstract] In vitro differentiation of mouse embryonic stem cells (mESCs) towards blood cells constitutes a well-established system to study the endothelial-to-hematopoietic transition (EHT) at the onset of blood development. Assessing the emergence of small non-adherent round blood cells in the culture without disturbing it is essential to evaluate ...
    Analysis of the Mitochondrial Membrane Potential Using the Cationic JC-1 Dye as a Sensitive Fluorescent Probe
    Authors:  Farzane Sivandzade, Aditya Bhalerao and Luca Cucullo, date: 01/05/2019, view: 187, Q&A: 0
    [Abstract] In recent years, fluorescent dyes have been frequently used for monitoring mitochondrial membrane potential to evaluate mitochondrial viability and function. However, the reproducibility of the results across laboratories strongly depends upon following well validated and reliable protocols along with the appropriate controls. Herein, we provide a ...
    Microirradiation for Precise, Double-strand Break Induction in vivo in Caenorhabditis elegans
    Authors:  Kailey E. Harrell, Emily Koury and Sarit Smolikove, date: 12/20/2018, view: 273, Q&A: 0
    [Abstract] DNA double-strand breaks (DSBs) are toxic lesions that every cell must accurately repair in order to survive. The repair of DSBs is an integral part of a cell life cycle and can lead to lethality if repaired incorrectly. Laser microirradiation is an established technique which has been used in yeast, mammalian cell culture, and Drosophila ...
    Systematic Quantification of GFP-tagged Protein Foci in Schizosaccharomyces pombe Nuclei
    Authors:  Kim Kiat Lim and Ee Sin Chen, date: 12/20/2018, view: 227, Q&A: 0
    [Abstract] DNA damage repair proteins form foci in response to DNA damaging agents. The efficiency and integrity of the DNA repair pathway of a particular eukaryotic (mutant) strain is usually determined by the number of foci formed compared with their wild-type counterpart. Conventionally, focus number is determined visually, and this low accuracy may ...
    Quantitative Analysis of Cargo Density in Single-extracellular Vesicles by Imaging
    Authors:  Taketoshi Kajimoto and Shun-ichi Nakamura, date: 12/20/2018, view: 343, Q&A: 0
    [Abstract] Function of extracellular vesicles such as exosomes and microvesicles is determined by their wide ranges of cargoes inside them. Even in the pure exosomes or microvesicles the cargo contents are very heterogeneous. To understand this heterogeneous nature of extracellular vesicles, we need information of the vesicles, which will give us some ...
    An in vitro Microscopy-based Assay for Microtubule-binding and Microtubule-crosslinking by Budding Yeast Microtubule-associated Protein
    Authors:  Yili Zhu, Weimin Tan and Wei-Lih Lee, date: 12/05/2018, view: 410, Q&A: 0
    [Abstract] In this protocol, we describe a simple microscopy-based method to assess the interaction of a microtubule-associated protein (MAP) with microtubules. The interaction between MAP and microtubules is typically assessed by a co-sedimentation assay, which measures the amount of MAP that co-pellets with microtubules by centrifugation, followed by ...
    Cluster Analysis of Endogenous HER2 and HER3 Receptors in SKBR3 Cells
    [Abstract] The Human Epidermal Growth Factor Receptor (HER) family of receptor tyrosine kinases consists of four, single pass, transmembrane receptor homologs (HER1-4) that act to regulate many critical processes in normal and tumor cells. HER2 is overexpressed in many tumors, and the deregulated proliferation of cancerous cells is driven by cooperation with ...
    Blinded Visual Scoring of Images Using the Freely-available Software Blinder
    Authors:  Steven D. Cothren, Joel N. Meyer and Jessica H. Hartman, date: 12/05/2018, view: 331, Q&A: 0
    [Abstract] In nearly all subfields of biomedical sciences, there are phenotypes that are currently classified by expert visual scoring. In research applications, these classifications require the experimenter to be blinded to the treatment group in order to avoid unintentional bias in scoring. Currently, many labs either use laborious and tedious methods to ...
    Electron Microscopic Detection of Proteins and Protein Complexes in Mammalian Cells Using APEX-tagged, Conditionally Stable Nanobodies
    Authors:  Thomas E. Hall, James Rae, Nicholas Ariotti and Robert G. Parton, date: 11/20/2018, view: 453, Q&A: 0
    [Abstract] The recent development of 3D electron microscopic techniques for cells and tissues has necessitated the development of new methods for the detection of proteins and protein-complexes in situ. The development of new genetic tags, such as the ascorbate peroxidase, APEX, for electron microscopic detection of tagged proteins has expanded the ...
    Mosaic Labeling and 3-Dimensional Morphological Analysis of Single Cells in the Zebrafish Left-right Organizer
    Authors:  Agnik Dasgupta, Andrew E. Jacob and Jeffrey D. Amack, date: 11/20/2018, view: 369, Q&A: 0
    [Abstract] A transient epithelial structure called the left-right organizer (LRO) establishes left-right asymmetry in vertebrate embryos. Developmental defects that alter LRO formation result in left-right patterning errors that often lead to congenital heart malformations. However, little is known about mechanisms that regulate individual cell behaviors ...



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