ABSTRACT

Light and temperature constitute two major entrainers of the circadian timing system. Understanding how photic signals are transduced through the SCN and how core body temperature influences peripheral cells is critical for understanding the emergence of biological rhythms in the peripheral tissues. This work discusses mechanistic mathematical models that capture the essential hierarchical structure of the photic and temperature signal transduction through the SCN leading to rhythmic patterns of endocrine hormones (cortisol) and peripheral clock genes activation with profound downstream physiological and pharmacological effects. We analyze the implications of disrupted light signals in the form of (social) jetlag and shift work and the implications of alterations in core body temperature rhythms. Such model predictions would add insights toward understanding the organization of the central timing system and the health implications of disrupting and restoring circadian rhythms. Finally, we discuss how population studies examining human behavior can shed light on the role the disruption of circadian rhythms plays in the development of chronic disease.

Invitation