Summary
This study examined how glutamate (100 μM) applied over different durations and repetitions modulates clock gene expression in the chick retina, finding gene-specific responses that may inform understanding of retinal circadian entrainment. For lighting design and healthcare, the findings highlight that glutamatergic signaling in the retina plays a nuanced role in circadian clock regulation, with implications for how light-driven neural signals reset biological rhythms.
Key Findings
- Clock gene expression was upregulated by both medium changes and glutamate treatment, in a stimulus-repetition-dependent manner.
- Per2 expression showed ultradian oscillation patterns in response to glutamate treatment, but was unaffected by medium changes alone.
- Bmal1 expression was not affected by either medium changes or glutamate treatment under the tested protocols.
- Glutamate was applied at 100 μM for 6 and 12 hours in 1 or 3 pulse repetitions, with gene expression assessed by quantitative PCR.
Categories
Sleep & Circadian Health: Investigates how glutamate modulates clock gene expression (Clock, Per2, Bmal1) in the retina, directly relevant to circadian entrainment mechanisms.
The Science of Light: Studies photic information processing in the retina of Gallus gallus and its role in synchronizing biological clocks via glutamatergic signaling.
Author(s)
RBA Dias
Publication Year
2014
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