Summary
This study demonstrates that cone photoreceptors in the retina function as autonomous circadian oscillators and provide input to the master circadian clock, particularly under constant light conditions. These findings deepen our understanding of which retinal cell types contribute to circadian entrainment, with potential implications for how spectral properties of light sources affect the circadian system.
Key Findings
- Using Nrl-/- cone gain-of-function mice, cones were shown to harbor an autonomous circadian oscillator within the retinal network.
- Novel evidence was provided for a functional input from cone photoreceptors to the suprachiasmatic nucleus (master clock), revealed under constant light conditions.
- The retinal circadian system is composed of multiple cell-type-specific oscillators, with cones representing a previously undercharacterized component.
Categories
The Science of Light: Investigates the role of cone photoreceptors as autonomous circadian oscillators within the retina and their input to the master clock, advancing understanding of photoreceptor biology in circadian entrainment.
Sleep & Circadian Health: Provides mechanistic evidence for cone-mediated contributions to circadian entrainment, relevant to understanding how different retinal photoreceptors shape light-dark cycle synchronization.
Author(s)
C Sandu, P Wongchitrat, N Mazzaro, C Jaeger
Publication Year
2020
Related Publications
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
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