The Synergistic Role of Light-Feeding Phase Relations on Entraining Robust Circadian Rhythms in the Periphery

May 5, 2017Gene regulation and systems biology

How the Timing of Light and Eating Together Helps Set Strong Body Clocks Outside the Brain

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Abstract

A semimechanistic mathematical model predicts that peripheral clock genes in human liver cells can be completely entrained to feeding rhythms, independent of light/dark cycles.

  • Feeding and fasting cycles serve as significant behavioral signals that synchronize biological rhythms in peripheral organs.
  • Phase misalignment between feeding rhythms and light/dark cycles may lead to circadian disruptions and physiological abnormalities.
  • The model incorporates the effects of light/dark cycles and feeding rhythms on the dynamics of clock genes in liver cells.
  • The activity of sirtuin 1, a cellular energy sensor, is included as a key factor in the model.
  • Different light-feeding phase relationships and intensities were simulated to explore their effects on feeding entrainment mechanisms.
  • The findings suggest that the relationship between light and feeding signals is crucial for maintaining robust circadian rhythms.

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