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Related Experiment Videos

Oscillations in cell morphology and redox state.

G Visser1, C Reinten, P Coplan

  • 1Department of Biochemistry, University of the Witwatersrand, Johannesburg, Republic of South Africa.

Biophysical Chemistry
|August 31, 1990
PubMed
Summary

Cell morphology and redox state rhythms, observed via light scattering, are inherent and modulated, suggesting intrinsic cellular dynamics rather than surface interactions. These findings offer insights into cell locomotion and signaling.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Biochemical Rhythms

Background:

  • Cells exhibit dynamic changes influencing light scattering and absorption.
  • Understanding cellular rhythms is crucial for interpreting cell behavior and signaling.

Purpose of the Study:

  • To analyze fluctuations in light scattering and absorption by cells in suspension.
  • To identify and characterize intrinsic cellular oscillations and their underlying causes.

Main Methods:

  • Analysis of light scattering and absorption intensity fluctuations.
  • Application of smoothing, periodogram, and power spectrum methods.
  • Investigation of rhythms with periods ranging from 10 seconds to 30 minutes.

Main Results:

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  • Oscillations attributed to cell morphology and redox states of NADH and FAD were detected.
  • Rhythms showed periodic amplitude modulation and burst characteristics.
  • Low-frequency dynamics linked to gross morphology; high-frequency variations to cell surface changes.
  • Agents like insulin and transferrin influenced these dynamics.

Conclusions:

  • Rhythmic changes in cell morphology, including those during locomotion, appear inherent to the cell.
  • Cellular rhythms are not solely due to periodic attachment/detachment from surfaces.
  • Light scattering analysis provides a method to study intrinsic cellular dynamics.