Summary
This review covers the molecular mechanisms governing retinal ganglion cell (RGC) development and subtype specification, including intrinsically photosensitive RGCs (ipRGCs) that drive circadian photoentrainment. Understanding RGC subtype diversity and the factors controlling their development is foundational for designing lighting systems that optimally stimulate non-visual pathways, and for anticipating how retinal diseases may impair circadian light responses.
Key Findings
- RGCs are the first retinal neurons generated during development, preceding all other retinal cell types across species.
- RGC subtypes are anatomically, physiologically, functionally, and molecularly distinct, with different transcription factor cascades governing specification of each subtype.
- The ciliary marginal zone is identified as a new stem cell niche in mice that contributes to retinal neurogenesis, particularly to ipsilateral RGC generation.
- Albinism disrupts RGC neurogenesis and ipsilateral projection specification, resulting in profound visual deficits — illustrating how genetic perturbation of RGC development affects visual system organization.
Categories
The Science of Light: This paper covers retinal ganglion cell (RGC) biology, including ipRGC subtypes, which are the primary photoreceptors mediating non-visual light responses relevant to circadian entrainment and melanopsin signaling.
Eye Health & Vision: The paper addresses RGC neurogenesis, subtype specification, and how genetic diseases like albinism disrupt retinal development and cause visual deficits.
Author(s)
KT Nguyen-Ba-Charvet, A Rebsam
Publication Year
2020
Number of Citations
36
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
Eye Health & Vision
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Genetic reactivation of cone photoreceptors restores visual responses in retinitis pigmentosa
- Melanopsin and rod–cone photoreceptors play different roles in mediating pupillary light responses during exposure to continuous light in humans
- Characteristic patterns of dendritic remodeling in early-stage glaucoma: evidence from genetically identified retinal ganglion cell types
- Intrinsically photosensitive melanopsin retinal ganglion cell contributions to the pupillary light reflex and circadian rhythm