Heterogeneous run-and-tumble motion accounts for transient non-Gaussian super-diffusion in haematopoietic

Benjamin Partridge1, Sara Gonzalez Anton2,3, Reema Khorshed2

  • 1Department of Bioengineering, Imperial College London, South Kensington Campus, London, United Kingdom.

Plos One
|September 13, 2022
PubMed

Insights

Multi-potent progenitor (MPP) cells exhibit transient super-diffusion, a finding explained by a run-and-tumble motion model. This research estimates the transition from super-diffusion to Fickian diffusion, highlighting motility

Area of Science:

  • Hematology
  • Cell Biology
  • Biophysics

Background:

  • Multi-potent progenitor (MPP) cells are crucial intermediates linking hematopoietic stem cells to mature blood cells.
  • MPP cell fate is influenced by migration between distinct spatial niches.
  • Understanding MPP cell dynamics is key to comprehending early hematopoietic development.

Purpose of the Study:

  • To statistically analyze MPP cell trajectory data from in vivo imaging.
  • To model MPP cell motion and explain observed super-diffusion.
  • To predict the transition from super-diffusion to Fickian diffusion at extended timescales.

Main Methods:

  • Long time-course 3D in vivo imaging of MPP cells in irradiated mouse calvaria.
  • Statistical analysis of cell trajectory data.
  • Development and application of a run-and-tumble cell motion model.

Main Results:

  • MPP cells exhibit transient super-diffusion with non-Gaussian displacement distributions.
  • A run-and-tumble model successfully explains the observed heterogeneous MPP dynamics.
  • Model extrapolation estimates the timescale for super-diffusion to transition to Fickian diffusion.

Conclusions:

  • Cellular motility plays a significant role in the function of early hematopoietic progenitors.
  • The run-and-tumble model provides a framework for understanding complex cell migration patterns.
  • This study offers quantitative insights into the diffusion dynamics of MPPs.

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