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Updated: Jun 27, 2026
09:52
Visualizing Neuroblast Cytokinesis During C. elegans Embryogenesis
Published on: March 13, 2014
A cytokinesis furrow is positioned by two consecutive signals
Henrik Bringmann1, Anthony A Hyman
1Max Planck Institute for Molecular Cell Biology and Genetics, Pfotenhauer Strasse 108, 01307 Dresden, Germany. bringman@mpi-cbg.de
Nature
|August 5, 2005
Summary
The cell division furrow
Area of Science:
- Cell Biology
- Developmental Biology
- Genetics
Background:
- Cytokinesis furrow position dictates daughter cell size and content distribution.
- Mitotic spindle position typically specifies furrow placement in animal cells.
- Discrepancies exist regarding whether spindle asters or the midzone primarily position the furrow.
Purpose of the Study:
- To investigate the distinct roles of the mitotic spindle's components in positioning the cytokinesis furrow.
- To elucidate the sequential signaling events that determine furrow placement in the C. elegans zygote.
Main Methods:
- Utilized ultraviolet laser to spatially separate the spindle midzone from microtubule asters in C. elegans zygotes.
- Observed and analyzed the impact of this separation on cytokinesis furrow formation and position.
Main Results:
- Demonstrated that microtubule asters initially signal furrow position.
- Showed a subsequent signal from the spindle midzone refines furrow placement.
- Identified two consecutive signaling events crucial for furrow positioning.
Conclusions:
- Cytokinesis furrow positioning is a two-step process involving both microtubule asters and the spindle midzone.
- This mechanism ensures accurate partitioning of cellular components during cell division.
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