dorsal/arxiv
View SchemaSelf-organized Vortex State in Two-dimensional Dictyostelium Dynamics
| Authors | Wouter-Jan Rappel, Alastair Nicol, Armand Sarkissian, Herbert Levine, William F. Loomis |
|---|---|
| Categories | |
| ArXiv ID | patt-sol/9811001 |
| URL | https://arxiv.org/abs/patt-sol/9811001 |
| DOI | 10.1103/PhysRevLett.83.1247 |
Abstract
We present results of experiments on the dynamics of Dictyostelium discoideum in a novel set-up which constraints cell motion to a plane. After aggregation, the amoebae collect into round ''pancake" structures in which the cells rotate around the center of the pancake. This vortex state persists for many hours and we have explicitly verified that the motion is not due to rotating waves of cAMP. To provide an alternative mechanism for the self-organization of the Dictyostelium cells, we have developed a new model of the dynamics of self-propelled deformable objects. In this model, we show that cohesive energy between the cells, together with a coupling between the self-generated propulsive force and the cell's configuration produces a self-organized vortex state. The angular velocity profiles of the experiment and of the model are qualitatively similar. The mechanism for self-organization reported here can possibly explain similar vortex states in other biological systems.
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"abstract": "We present results of experiments on the dynamics of Dictyostelium discoideum\nin a novel set-up which constraints cell motion to a plane. After aggregation,\nthe amoebae collect into round \u0027\u0027pancake\" structures in which the cells rotate\naround the center of the pancake. This vortex state persists for many hours and\nwe have explicitly verified that the motion is not due to rotating waves of\ncAMP. To provide an alternative mechanism for the self-organization of the\nDictyostelium cells, we have developed a new model of the dynamics of\nself-propelled deformable objects. In this model, we show that cohesive energy\nbetween the cells, together with a coupling between the self-generated\npropulsive force and the cell\u0027s configuration produces a self-organized vortex\nstate. The angular velocity profiles of the experiment and of the model are\nqualitatively similar. The mechanism for self-organization reported here can\npossibly explain similar vortex states in other biological systems.",
"arxiv_id": "patt-sol/9811001",
"authors": [
"Wouter-Jan Rappel",
"Alastair Nicol",
"Armand Sarkissian",
"Herbert Levine",
"William F. Loomis"
],
"categories": [
"patt-sol",
"cond-mat.soft",
"nlin.PS",
"q-bio.CB"
],
"doi": "10.1103/PhysRevLett.83.1247",
"title": "Self-organized Vortex State in Two-dimensional Dictyostelium Dynamics",
"url": "https://arxiv.org/abs/patt-sol/9811001"
},
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