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A time-lapse imaging assay to study nuclear envelope breakdown.

Sunita S Shankaran1, Douglas R Mackay, Katharine S Ullman

  • 1Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA.

Methods in Molecular Biology (Clifton, N.J.)
|October 3, 2012
PubMed
Summary

This study visualizes nuclear envelope breakdown during mitosis using real-time imaging and a permeabilized cell system. The method allows detailed observation of nuclear remodeling and disassembly mechanisms.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biophysics

Background:

  • Nuclear envelope breakdown is a key event in mitosis.
  • Visualizing this process in real-time is crucial for understanding cell division.
  • Existing methods have limitations in dynamic visualization.

Purpose of the Study:

  • To develop a versatile platform for visualizing nuclear envelope breakdown.
  • To probe mechanisms coordinating nuclear disassembly during mitosis.
  • To study dynamic nuclear remodeling in a controlled system.

Main Methods:

  • Utilizing real-time imaging with a permeabilized cell system.
  • Employing digitonin to permeabilize cells expressing fluorescently tagged nucleoporin POM121 and Histone H2B.
  • Incubating cells with mitotic Xenopus egg extract to recapitulate mitotic nuclear remodeling.

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Main Results:

  • Successful visualization of dynamic nuclear envelope breakdown.
  • Demonstration of a system to recapitulate major mitotic nuclear remodeling events.
  • Establishment of a platform for mechanistic studies of nuclear disassembly.

Conclusions:

  • The described strategy offers a powerful tool for studying mitosis.
  • This method facilitates the investigation of pathways coordinating nuclear envelope breakdown.
  • Real-time imaging of permeabilized cells provides new insights into nuclear remodeling.