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A Microfluidics Approach for the Functional Investigation of Signaling Oscillations Governing Somitogenesis
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Feedback regulation in multistage cell lineages.

Wing-Cheong Lo1, Ching-Shan Chou, Kimberly K Gokoffski

  • 1Departments of Mathematics, University of California, Irvine, CA, United States.

Mathematical Biosciences and Engineering : MBE
|March 19, 2009
PubMed
Summary

This study models olfactory epithelium neurogenesis, finding that autoregulation of transit amplifying progenitor cells and low terminally differentiated cell death stabilize the system. This research clarifies how tissues autoregulate development and regeneration.

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Area of Science:

  • Developmental Biology
  • Stem Cell Biology
  • Neuroscience

Background:

  • Multistage cell lineages, including stem cells and transit amplifying (TA) progenitors, specify differentiated cell types in self-renewing tissues.
  • Feedback regulation governs stem and progenitor cell self-renewal and differentiation.
  • Tissue autoregulation of cell number and identity relies on lineage complexity and feedback.

Purpose of the Study:

  • To model neurogenesis in the mouse olfactory epithelium (OE).
  • To analyze the stability of steady states in OE neurogenesis.
  • To identify conditions for system stability under different feedback representations.

Main Methods:

  • Mathematical modeling of neurogenesis in the olfactory epithelium.
  • Analysis of steady-state existence, uniqueness, and stability.
  • Investigation of negative feedback loops using Hill functions and general terms.

Main Results:

  • Established the existence and uniqueness of steady states in the OE neurogenesis model.
  • Identified parameter conditions for local and global stability.
  • Demonstrated that autoregulation of TA cell proliferation and low terminally differentiated (TD) cell death enhance system stability.

Conclusions:

  • Autoregulation of transit amplifying progenitor cell proliferation is crucial for olfactory epithelium development stability.
  • A low death rate of terminally differentiated olfactory receptor neurons contributes to system stability.
  • The findings provide insights into the mechanisms of tissue autoregulation in development and regeneration.