Extracellular and intracellular factors regulating the migration direction of a chemotactic cell in traveling-wave chemotaxis

R. Ishiwata, M. Iwasa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This report presents a simple model that describes the motion of a single Dictyostelium discoideum cell exposed to a traveling wave of cyclic adenosine monophosphate (cAMP). The model incorporates two types of responses to stimulation by cAMP: the changes in the polarity and motility of the cell. The periodic change in motility is assumed to be induced by periodic cAMP stimulation on the basis of previous experimental studies. Consequently, the net migration of the cell occurs in a particular direction with respect to wave propagation, which explains the migration of D. discoideum cells in aggregation. The wave period and the difference between the two response times are important parameters that determine the direction of migration. The theoretical prediction compared with experiments presented in another study. The transition from the single-cell state of the population of D. discoideum cells to the aggregation state is understood to be a specific example of spontaneous breakage of symmetry in biology.

Original languageEnglish
Article number026004
JournalPhysical Biology
Volume12
Issue number2
DOIs
Publication statusPublished - 2015 Apr 1
Externally publishedYes

Keywords

  • Dictyostelium discoideum
  • aggregation
  • cAMP wave
  • mathematical model

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Molecular Biology
  • Cell Biology

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