Summary
This study examined whether a synonymous A-to-G substitution at position 2548 in the HPER1 gene influences morningness-eveningness preferences in 463 middle-aged participants, finding no significant association. For lighting designers and clinicians, this suggests that individual chronotype variability is not meaningfully driven by this particular HPER1 polymorphism, and other genetic or environmental factors (including light exposure) likely play larger roles.
Key Findings
- HPER1 2548G allele frequency was 0.85 and HPER1 2548A allele frequency was 0.15 in the Wisconsin Sleep Cohort Study sample (n=463).
- Morningness-eveningness scores (Horne-Ostberg questionnaire) did not differ significantly across HPER1 2548 genotype groups.
- Unlike previously reported CLOCK gene polymorphism findings, the HPER1 2548 variant does not appear to modulate chronotype in the general population.
Categories
Sleep & Circadian Health: Investigates genetic polymorphisms in HPER1 and their association with chronotype (morningness-eveningness tendencies).
The Science of Light: Examines molecular components of the circadian clock machinery relevant to understanding entrainment biology.
Author(s)
JD Carpen
Publication Year
2007
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 twoāprocess 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