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Related Experiment Videos

Deterministic dynamics control oscillations of bone marrow cell proliferation.

Claire Wolfrom1, Philippe Bourin, Nguyen-Phong Chau

  • 1INSERM U.347, le Kremlin-Bicêtre, France. wolfrom@kb.inserm.fr

Experimental Hematology
|September 4, 2004
PubMed
Summary

Mouse bone marrow cell proliferation exhibits large, regular oscillations controlled by a negative feedback mechanism. This dampening control of proliferation peaks protects the stem cell supply.

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Area of Science:

  • Hematology
  • Cell Biology
  • Systems Biology

Background:

  • Normal and tumoral blood cell production exhibit oscillatory dynamics.
  • Cells in long-term cultures often display significant oscillations in proliferation rates.

Purpose of the Study:

  • To characterize the proliferation dynamics of mouse bone marrow cells (MBM) and their clonogenic progenitor production (BMP).
  • To investigate the underlying control mechanisms governing these oscillatory dynamics.

Main Methods:

  • Utilized Dexter-type cultures of MBM and BMP over extended periods (up to seven months).
  • Applied a previously established method based on two-dimensional recurrent representation for analyzing nonlinear dynamics.
  • Analyzed complex oscillation patterns with variable amplitudes in cell proliferation time series.

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Main Results:

  • Mouse bone marrow cell proliferation demonstrated large amplitude oscillations occurring every 2-3 weeks.
  • Mathematical analysis identified a deterministic mechanism regulating proliferation maxima in MBM cells.
  • Progenitor production dynamics mirrored those of the parental cells, indicating predominant negative feedback.

Conclusions:

  • Bone marrow cell proliferation dynamics are controlled by a bipolar mechanism, distinct from hepatoma cells.
  • A predominant dampening control mechanism targets proliferation maxima in bone marrow cells.
  • This control mechanism likely serves to protect the stem cell population.