Developmental control of rod number via a light-dependent retrograde pathway from intrinsically photosensitive retinal ganglion cells
Document Type
Journal Article
Publication Date
8-8-2024
Journal
Developmental cell
DOI
10.1016/j.devcel.2024.07.018
Keywords
adaptation; ipRGCs; photoreceptor pruning; sensory experience; visual experience
Abstract
Photoreception is essential for the development of the visual system, shaping vision's first synapse to cortical development. Here, we find that the lighting environment controls developmental rod apoptosis via Opn4-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs). Using genetics, sensory environment manipulations, and computational approaches, we establish a pathway where light-dependent glutamate released from ipRGCs is detected via a transiently expressed glutamate receptor (Grik3) on rod precursors within the inner retina. Communication between these cells is mediated by hybrid neurites on ipRGCs that sense light before eye opening. These structures span the ipRGC-rod precursor distance over development and contain the machinery for photoreception (Opn4) and neurotransmitter release (Vglut2 & Syp). Assessment of the human gestational retina identifies conserved hallmarks of an ipRGC-to-rod axis, including displaced rod precursors, transient GRIK3 expression, and ipRGCs with deep-projecting neurites. This analysis defines an adaptive retrograde pathway linking the sensory environment to rod precursors via ipRGCs prior to eye opening.
APA Citation
D'Souza, Shane P.; Upton, Brian A.; Eldred, Kiara C.; Glass, Ian; Nayak, Gowri; Grover, Kassidy; Ahmed, Abdulla; Nguyen, Minh-Thanh; Hu, Yueh-Chiang; Gamlin, Paul; and Lang, Richard A., "Developmental control of rod number via a light-dependent retrograde pathway from intrinsically photosensitive retinal ganglion cells" (2024). GW Authored Works. Paper 5497.
https://hsrc.himmelfarb.gwu.edu/gwhpubs/5497
Department
School of Medicine and Health Sciences Student Works