Summary
Disruption of core circadian clock genes (Cry1 and Cry2) in mice induces salt-dependent hypertension through abnormal aldosterone synthesis in the adrenal gland, with the pathophysiologic mechanism conserved in humans. For lighting designers and healthcare professionals, this research underscores that chronic circadian disruption—such as that caused by poor lighting environments—may have serious metabolic and cardiovascular consequences beyond sleep disturbance.
Key Findings
- Deletion of both Cry1 and Cry2 genes in mice causes salt-dependent hypertension due to overproduction of the mineralocorticoid aldosterone in adrenal zona glomerulosa cells.
- The newly identified steroidogenic enzyme Hsd3b6, whose expression is elevated in Cry1/2-deficient mice, is functionally conserved in humans, suggesting a direct link to human idiopathic hyperaldosteronism.
- Circadian clock disruption is associated not only with sleep-arousal disorders but also with hypertension, diabetes, obesity, and cancer, broadening the disease relevance of circadian dysfunction.
Categories
Sleep & Circadian Health: Examines how circadian clock gene disruption (Cry1/Cry2) leads to systemic disease, linking circadian dysfunction to hypertension, diabetes, obesity, and cancer.
The Science of Light: Provides mechanistic insight into peripheral circadian clock function in the adrenal gland, relevant to understanding how light-entrainable clocks regulate downstream physiological processes.
Author(s)
S Kießling
Publication Year
2010
Related Publications
Sleep & Circadian Health
- Phototransduction by retinal ganglion cells that set the circadian clock
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- The two‐process model of sleep regulation: a reappraisal
- Melanopsin is required for non-image-forming photic responses in blind mice
- Strange vision: ganglion cells as circadian photoreceptors
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice