Body’s internal clocks in managing energy use and fuel processing

Circadian systems optimize energy acquisition and storage in synchrony with the Earth's rotation.

• Circadian clocks in plants regulate gene expression for photosynthesis during the day and nitrogen fixation at night.
• In mammals, the core clock in the suprachiasmatic nucleus coordinates peripheral clocks with the light cycle.
• Local clocks in the endocrine pancreas are involved in insulin secretion, highlighting their role in maintaining organismal balance.
• Disruption of circadian rhythms may affect nuclear hormone receptor signaling and the regulation of metabolism.
• Genetic studies suggest significant interactions between circadian and metabolic systems, influencing fuel use during the sleep-wake cycle.

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