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Title: Glial cells expressing visual cycle genes are vital for photoreceptor survival in the zebrafish pineal gland
Authors: Elazary, Yotam
Cheow, Kathleen
Cheng, Ruey-Kuang
Ghosh, Raghumoy
Shainer, Inbal
Wexler, Yair
Crasta, Karen
Gothilf, Yoav
Jesuthasan, Suresh
Keywords: Science::Biological sciences
Issue Date: 2023
Source: Elazary, Y., Cheow, K., Cheng, R., Ghosh, R., Shainer, I., Wexler, Y., Crasta, K., Gothilf, Y. & Jesuthasan, S. (2023). Glial cells expressing visual cycle genes are vital for photoreceptor survival in the zebrafish pineal gland. Journal of Pineal Research, 74(3), e12854-.
Project: NRF2017‐NRF‐ISF002‐2676 
Journal: Journal of Pineal Research 
Abstract: Photoreceptors in the vertebrate eye are dependent on the retinal pigmented epithelium for a variety of functions including retinal re-isomerization and waste disposal. The light-sensitive pineal gland of fish, birds, and amphibians is evolutionarily related to the eye but lacks a pigmented epithelium. Thus, it is unclear how these functions are performed. Here, we ask whether a subpopulation of zebrafish pineal cells, which express glial markers and visual cycle genes, is involved in maintaining photoreceptors. Selective ablation of these cells leads to a loss of pineal photoreceptors. Moreover, these cells internalize exorhodopsin that is secreted by pineal rod-like photoreceptors, and in turn release CD63-positive extracellular vesicles (EVs) that are taken up by pdgfrb-positive phagocytic cells in the forebrain meninges. These results identify a subpopulation of glial cells that is critical for pineal photoreceptor survival and indicate the existence of cells in the forebrain meninges that receive EVs released by these pineal cells and potentially function in waste disposal.
ISSN: 0742-3098
DOI: 10.1111/jpi.12854
Schools: Lee Kong Chian School of Medicine (LKCMedicine) 
Rights: © 2023 John Wiley & Sons A/S. All rights reserved. This article may be downloaded for personal use only. Any other use requires prior permission of the copyright holder. The Version of Record is available online at
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:LKCMedicine Journal Articles

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