Summary
This study identifies a distinct melanopsin-expressing retinal ganglion cell subtype confined to the dorsal retina that exclusively projects to the supraoptic nucleus (SON), a region regulating fluid homeostasis and neuroendocrine function. This finding expands the known diversity of ipRGC subtypes and their downstream targets beyond circadian (SCN) pathways, with potential implications for understanding how light influences neuroendocrine and autonomic responses.
Key Findings
- A GlyT2 Cre mouse line revealed a novel ipRGC subtype restricted to the dorsal retina that tiles that region in a mosaic pattern.
- This ipRGC subtype selectively projects to the supraoptic nucleus (SON) rather than to canonical circadian targets such as the SCN, indicating a specialized non-circadian light-signaling pathway.
Categories
The Science of Light: Describes a novel ipRGC subtype with specific retinal topography and projection to the supraoptic nucleus, advancing understanding of non-visual photoreceptor biology and circadian/neuroendocrine light signaling pathways.
Author(s)
MH Berry, M Moldavan, T Garrett, M Meadows
Publication Year
2023
Number of Citations
5
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