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Transient frequency preference responses in cell signaling systems.

Candela L Szischik1,2, Juliana Reves Szemere1,2,3, Rocío Balderrama4,5

  • 1Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Física. Ciudad Universitaria, 1428, Buenos Aires, Argentina.

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Cell signaling systems exhibit unique transient frequency preferences during early responses to repetitive stimulation, a mechanism potentially used for filtering signals. This transient response differs from steady-state behavior and is crucial for understanding cellular information processing.

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Area of Science:

  • Systems biology
  • Cellular signaling
  • Gene expression

Background:

  • Cell signaling components like ligand-receptor systems, covalent modification cycles, and transcriptional networks are key to gene expression.
  • While steady-state responses to stimulation are understood, early-stage and transient responses to repetitive signals remain poorly characterized.
  • Early cellular responses can be as informative as late-stage ones, especially when stimulation is transient or component timescales differ.

Purpose of the Study:

  • To analyze the frequency response of simple biological motifs at different time stages, focusing on transient versus periodic regimes.
  • To investigate how transient frequency preferences in isolated motifs are reflected in larger cellular cascades and pathways.
  • To highlight the potential role of transient frequency preferences as a signal filtering mechanism in cellular circuits.

Main Methods:

  • Analysis of frequency response in simple biological motifs using dose-conserved pulsatile input signals.
  • Examination of various metrics versus frequency curves at different time stages of stimulation.
  • Evaluation of transient frequency preferences in isolated motifs and their impact on larger signaling cascades.

Main Results:

  • Ligand-receptor systems demonstrate frequency preference responses during transient stages, which are absent in the periodic regime.
  • A distinct frequency preference was observed in specific metrics during the early, transient phase of stimulation.
  • This transient frequency preference mechanism was found to be generalizable to more complex signaling cascades and pathways.

Conclusions:

  • Transient frequency preferences represent an overlooked but significant dynamic feature in cell signaling and gene expression.
  • Cells may utilize transient frequency preferences as a system-level mechanism to filter incoming signals for higher-order circuits.
  • Understanding these early-stage dynamics is crucial for a comprehensive view of cellular information processing.