Related Experiment Video
Updated: Jun 8, 2026
06:09
Studying the Protein Quality Control System of D. discoideum Using Temperature-controlled Live Cell Imaging
Published on: December 2, 2016
Understanding streaming in Dictyostelium discoideum: theory versus experiments
J C Dallon1, Brittany Dalton, Chelsea Malani
1Department of Mathematics, Brigham Young University, Provo, UT 84602-6539, USA. dallon@math.byu.edu
Bulletin of Mathematical Biology
|October 12, 2010
Summary
Cell aggregation in Dictyostelium discoideum relies on random cell motion and chemotaxis to higher cell density, not chemoattractant localization. These factors explain experimental results and reconcile theory with observations.
Area of Science:
- Cellular biology
- Biophysics
- Mathematical modeling
Background:
- Dictyostelium discoideum aggregation involves chemoattractant signaling.
- Experimental findings on chemoattractant localization appear to contradict theoretical models.
- Previous models reproduced cell streaming without considering localized signaling.
Purpose of the Study:
- To reconcile discrepancies between experimental results and theoretical models of Dictyostelium discoideum aggregation.
- To identify the key factors driving stream formation during cell aggregation.
- To evaluate the role of chemoattractant localization in stream formation.
Main Methods:
- Analysis of experimental data on Dictyostelium discoideum aggregation.
- Theoretical modeling of cell aggregation dynamics.
- Comparison of mathematical models with and without localized chemoattractant release.
Main Results:
- Random cell motion and chemotaxis to regions of higher cell density are crucial for stream formation.
- Random motion reduces streaming, while chemotaxis enhances it.
- Experimental results are explained by variations in random motion and chemotaxis, not chemoattractant localization.
Conclusions:
- Chemoattractant localization is not the primary driver of stream formation in Dictyostelium discoideum aggregation.
- The interplay between random cell motion and chemotaxis to cell density is sufficient to explain observed streaming patterns.
- Mathematical models show minimal difference in streaming patterns regardless of chemoattractant localization simulation.
Related Concept Videos
01:27Diversity of Protists IV
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
01:15Theories of Dissolution: Diffusion Layer Model
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...