Related Experiment Video
Updated: Dec 24, 2025
07:33
Author Spotlight: Studying Behavior of Acanthamoeba to Develop Targeted Strategies for Preventing Acanthamoeba Keratitis
Published on: September 20, 2024
3.1K
Dissection of amoeboid movement into two mechanically distinct modes
Kunito Yoshida1, Thierry Soldati
1Department of Biological Sciences, Sir Alexander Fleming Building, Imperial College, South Kensington, London, SW7 2AZ, UK.
Journal of Cell Science
|August 24, 2006
Summary
Cell locomotion involves more than just actin polymerization. New research shows that cell blebbing, driven by myosin II, significantly contributes to amoeboid motility in Dictyostelium.
Area of Science:
- Cell Biology
- Biophysics
Background:
- The dominant model of cell locomotion relies on actin polymerization driving filopodia and lamellipodia.
- This model inadequately explains complex amoeboid motility seen in embryogenesis and metastasis.
Purpose of the Study:
- To investigate the role of cell blebbing in amoeboid cell locomotion.
- To determine the contribution of focal blebbing to cell movement.
Main Methods:
- Observation of Dictyostelium cell movement in a physiological environment.
- Inhibition of blebbing using high osmolarity and blebbistatin.
- Analysis of myosin-II-null cells.
Main Results:
- Dictyostelium cells continuously produce blebs at their leading edges.
- Bleb formation requires myosin II activity.
- Inhibition of blebbing significantly reduced pseudopodia extension, cell body retraction, and overall cell displacement.
Conclusions:
- Amoeboid motility involves two distinct mechanical processes: blebbing and filopodia-lamellipodia formation.
- Focal blebbing is a significant contributor to cell locomotion.
- Myosin II activity is crucial for bleb-driven cell motility.
