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Local photic entrainment of the retinal circadian oscillator in the absence of rods, cones, and melanopsin
Light resets the eye’s internal clock even without rods, cones, or melanopsin
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Abstract
Retinas of Opn4(-/-);rd1/rd1 mice synchronize to light/dark cycles independently of the brain's master circadian pacemaker.
- The mammalian retina functions as its own circadian clock.
- Lighting cycles can entrain the retinal circadian clock in vitro without the involvement of rods, cones, or melanopsin.
- In vivo observations indicate that retinal synchronization occurs regardless of the master circadian pacemaker's phase.
- This suggests that the retina may utilize a distinct mechanism for local circadian entrainment compared to the overall organismal rhythm.
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