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​Cell–cell contacts: desmosomes visualized via desmoplakin

3/21/2017

 
Z-stack with overlay
Low magnification timelapse
Figure. Movies of desmoplakin in desmosomes. Top: Z-stack of live hiPS cells expressing mEGFP-tagged desmoplakin imaged on a spinning-disk confocal microscope. Images start from the bottom of the cells and end at the top. The right panel shows the left panel overlaid onto the equivalent transmitted light image. Bottom: timelapse movie of a hiPS cell colony expressing mEGFP-tagged desmoplakin. Images were collected in 3D every 4 minutes for 8 hours on a spinning-disk confocal microscope. Images are maximum intensity projections; playback speed is 2400x real time.

Observations
  • Desmoplakin is involved in the linkage of intermediate filaments to cell-cell adhesion sites (desmosomes) in epithelial cells. These desmosomes are seen as small puncta at apical cell-cell boundaries.
  • In hiPS cells, desmoplakin puncta are not visible in all cells. However, when present there are between 1 and ~20 puncta present per cell.
  • There may be position-dependent differences in number of desmosomes depending on the spatial location of a cell within a colony. For example, we observe differences between the number of desmosomes in the tightly-packed centers of colonies vs. the flatter, less epithelial-like cells at the edges of colonies; however, this is a casual rather than a rigorous observation.
  • Desmosomes stay intact during cell division

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  • About
    • What We Do
    • FAQs
    • Videos & Tutorials
    • Site Updates
    • < Forum >
    • < AllenInstitute.org >
  • Animated Cell
    • Educational Resources
    • Visual Guide to Human Cells
    • Visual Guide Tutorial
    • Research Projects >
      • Pathtrace rendering
  • Cells & Biology
    • Cell Catalog
    • About our Cells >
      • hiPS Cell Biology Overview
      • Cell Structure Observations
      • Cell Catalog QuickView
    • Genomics
    • Methods & SOPs >
      • Methods for Cells in the Lab
      • Cell Methods: Videos from the Lab
      • Methods for Microscopy
    • Research Projects >
      • hiPS Cells During Mitosis
      • Drug Perturbation Pilot
      • Differentiation Into Cardiomyocytes
      • Why Endogenous Tagging?
  • Data & Tools
    • Cell Catalog
    • 3D Cell Viewer
    • Cell Feature Explorer
    • Integrated Mitotic Stem Cell Z-stack Viewer
    • Deep Cell Zoom
    • Segmenter
    • Data Downloading
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    • Research Projects >
      • Extracting Information
  • Modeling & Analysis
    • Integrated Mitotic Stem Cell
    • Allen Integrated Cell
    • Label-free Determination
    • Data Notebook Exploration >
      • Cell Shape Analysis
      • Programmatic Data Access
    • Research Projects >
      • 3D Probabilistic Modeling
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    • Publications
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