Cited by 996Circadian rhythm and melatoninRetinal Development and DisordersVisual perception and processing mechanisms

Central projections of melanopsin‐expressing retinal ganglion cells in the mouse

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Hattar, Samer, Kumar, Monica, Park, Alexander, Tong, Patrick, Tung, Jonathan, Yau, King‐Wai, Berson, David M.·2006·Journal of Comparative Neurology

Abstract

A rare type of ganglion cell in mammalian retina is directly photosensitive. These novel retinal photoreceptors express the photopigment melanopsin. They send axons directly to the suprachiasmatic nucleus (SCN), intergeniculate leaflet (IGL), and olivary pretectal nucleus (OPN), thereby contributing to photic synchronization of circadian rhythms and the pupillary light reflex. Here, we sought to characterize more fully the projections of these cells to the brain. By targeting tau‐lacZ to the melanopsin gene locus in mice, ganglion cells that would normally express melanopsin were induced to express, instead, the marker enzyme β‐galactosidase. Their axons were visualized by X‐gal histochemistry or anti‐β‐galactosidase immunofluorescence. Established targets were confirmed, including the SCN, IGL, OPN, ventral division of the lateral geniculate nucleus (LGv), and preoptic area, but the overall projections were more widespread than previously recognized. Targets included the lateral nucleus, peri‐supraoptic nucleus, and subparaventricular zone of the hypothalamus, medial amygdala, margin of the lateral habenula, posterior limitans nucleus, superior colliculus, and periaqueductal gray. There were also weak projections to the margins of the dorsal lateral geniculate nucleus. Co‐staining with the cholera toxin B subunit to label all retinal afferents showed that melanopsin ganglion cells provide most of the retinal input to the SCN, IGL, and lateral habenula and much of that to the OPN, but that other ganglion cells do contribute at least some retinal input to these targets. Staining patterns after monocular enucleation revealed that the projections of these cells are overwhelmingly crossed except for the projection to the SCN, which is bilaterally symmetrical. J. Comp. Neurol. 497:326–349, 2006. © 2006 Wiley‐Liss, Inc.

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  • There are several indirect pathways affected by light at night that may contribute to mood disturbances.

    “In addition, there are several indirect pathways affected by light at night that may contribute to mood disturbances37.”

    From Circadian rhythm disruption and mental health (2020) · cites this paper as [37]

    The Discussion (page unavailable) describes several routes by which retinal light signals reach brain regions involved in sleep, circadian activity, and neuroendocrine function. It does not address light specifically at night or suggest that these pathways contribute to mood disturbances. (LLM, conf=0.84)

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  • ipRGCs have other direct and indirect targets throughout the brain, including mood-related structures such as the amygdala and habenula.

    “In addition, ipRGCs have other direct and indirect targets throughout the brain, including mood-related structures (e.g. amygdala and habenula)37.”

    From Circadian rhythm disruption and mental health (2020) · cites this paper as [37]

    The Discussion reports mRGC projections to the medial amygdala and habenular region, supporting the named anatomical targets. It does not characterize those structures as mood-related or establish a broader set of indirect ipRGC targets; its habenula discussion only suggests that some light responses may arise through indirect pathways. The indexed copy provides no page numbers for these passages. (LLM, conf=0.82)

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Research works printed but not linked: 2

  1. Ling C, Schneider GE, Northmore D, Jhaveri S. Afferents from the colliculus, cortex, and retina have distinct terminal morphologies in the lateral posterior thalamic nucleus. J Comp Neurol. 1997;388:467–483. [PubMed] [Google Scholar]
  2. Morin LP, Blanchard JH. Interconnections among nuclei of the subcortical visual shell: the intergeniculate leaflet is a major constituent of the hamster subcortical visual system. J Comp Neurol. 1998;396:288–309. [PubMed] [Google Scholar]

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Authors
Hattar, S., Kumar, M., Park, A., Tong, P., Tung, J., Yau, K., & Berson, D. M.
Affiliations
  • Johns Hopkins University (US)
  • Brown University (US)
Corresponding author
Berson, David M.
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2006-05-30
Volume
497
Issue
3
Pages
326-349
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2147949992
Cited by
996
References
111
Citations by year
2026: 29 · 2025: 34 · 2024: 56 · 2023: 54 · 2022: 63 · 2021: 73 · 2020: 72 · 2019: 50 · 2018: 62 · 2017: 63 · 2016: 59 · 2015: 52 · 2014: 56 · 2013: 51 · 2012: 48
FWCI
12.06
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Eye Institute (R01EY012793, R01EY017137, R01EY014596, R01EY006837)
  • National Institute on Deafness and Other Communication Disorders (R01DC006904)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
melanopsin, retinal ganglion cells, retinal projections, suprachiasmatic nucleus, intergeniculate leaflet, olivary pretectal nucleus, pupillary light reflex, lateral habenula, lateral geniculate nucleus, lateral nucleus, superior colliculus, periaqueductal gray, medial amygdala, retinal afferents, monocular enucleation
MeSH terms
Melanopsin, Animals, beta-Galactosidase, Female, Functional Laterality, Male, Photoreceptor Cells, Retinal Ganglion Cells, Staining and Labeling, Visual Pathways, Eye Enucleation, Biomarkers, Rod Opsins, Mice, Knockout, Mice, Light Signal Transduction

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