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Published on: November 7, 2013
A cellular funicular: A hydrodynamic coupling between the anterior- and posterior-directed cytoplasmic flows
Ritsuya Niwayama1, Akatsuki Kimura
1Department of Genetics; School of Life Science; The Graduate University for Advanced Studies; (Sokendai); and Cell Architecture Laboratory; Center for Frontier Research; National Institute of Genetics, Mishima, Japan.
Worm
|September 24, 2013
Summary
Cellular organelles move directionally using active forces. A myosin-generated force in C. elegans embryos drives opposing cytoplasmic flows, demonstrating efficient, coordinated bidirectional organelle movement.
Area of Science:
- Cell Biology
- Biophysics
- Developmental Biology
Background:
- Directed organelle movement is crucial for cellular function.
- Active force generation mechanisms drive intracellular transport.
Purpose of the Study:
- To investigate the mechanism of cytoplasmic streaming in C. elegans embryos.
- To explore how a single active force can drive bidirectional organelle movement.
Main Methods:
- Utilized studies on cytoplasmic streaming in C. elegans embryos.
- Analyzed myosin-generated forces and hydrodynamic properties of cytoplasm.
- Compared findings with centrosome positioning and neurogenesis studies.
Main Results:
- Demonstrated that myosin-generated force drives both anterior and posterior cytoplasmic flows.
- Showcased that hydrodynamic properties mediate this coupled flow.
- Identified similar "funicular-like" coupling in centrosome positioning and neurogenesis.
Conclusions:
- A single active force mechanism can drive bidirectional organelle movement, termed "funicular-like" coupling.
- This strategy is efficient and allows for coordinated movement speeds.
- Funicular-like coupling may be a general and advantageous mechanism in cellular processes.
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