Cited by 84Circadian rhythm and melatoninRetinal Development and DisordersVisual perception and processing mechanisms

Melanopsin-expressing retinal ganglion cells: implications for human diseases

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La Morgia, Chiara, Ross-Cisneros, Fred N., Hannibal, Jens, Montagna, Pasquale, Sadun, Alfredo A., Carelli, Valerio·2011·Vision Research

Abstract

In the last decade, there was the seminal discovery of melanopsin-expressing retinal ganglion cells (mRGCs) as a new class of photoreceptors that subserve the photoentrainment of circadian rhythms and other non-image forming functions of the eye. Since then, there has been a growing research interest on these cells, mainly focused on animal models. Only recently, a few studies have started to address the relevance of the mRGC system in humans and related diseases. We recently discovered that mRGCs resist neurodegeneration in two inherited mitochondrial disorders that cause blindness, i.e. Leber hereditary optic neuropathy and dominant optic atrophy. The mechanism leading to mRGCs sparing in these blinding disorders, characterized by extensive and selective loss of RGCs, is currently unknown and under investigation. Other studies reported on mRGCs in glaucoma, on genetic variation of the melanopsin gene (OPN4) in seasonal affective disorder and on the role of mRGCs in migraineous photophobia. Our own data and studies from others have shown a significant reduction of mRGCs with aging. We anticipate that these studies will lead to many other investigations addressing the role of mRGCs and circadian photoreception in the pathogenesis of circadian and sleep abnormalities in neurodegenerative disorders.

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  1. Hannibal, J., Hindersson, P., Knudsen, S. M., Georg, B., & Fahrenkrug, J. (2002). The photopigment melanopsin is exclusively present in PACAP containing retinal ganglion cells of the retinohypothalamic tract. Journal of Neuroscience, 22(RC191), 1-7.
  2. Pérez-Rico, C., de la Villa, P., Blanco, R., Germain, F., Paz-Moreno, J., & Arribas- Gómez, I. (2009). Alterations in nocturnal melatonin secretion in patients with optic neuropathies. Archivos de la Sociedad Espanola de Oftalmologia, 84(5), 251-257.

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Authors
La Morgia, C., Ross-Cisneros, F. N., Hannibal, J., Montagna, P., Sadun, A. A., & Carelli, V.
Affiliations
  • University of Copenhagen (DK)
  • University of Bologna (IT)
  • University of Southern California (US)
Venue
Vision Research
Publisher
Elsevier BV
Published
2011-01
Volume
51
Issue
2
Pages
296-302
ISSN
0042-6989 (ISSN-L)
OpenAlex
W2000714496
Cited by
84
References
116
Citations by year
2026: 7 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 3 · 2021: 2 · 2020: 2 · 2019: 5 · 2018: 6 · 2017: 7 · 2016: 12 · 2015: 7 · 2014: 9 · 2013: 6 · 2012: 7
FWCI
0.51
Type
journal article
Language
en
Open access
Locations
  • Vision Research (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
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
circadian photoreception, non-image-forming vision, circadian entrainment, Leber's hereditary optic neuropathy, autosomal dominant optic atrophy, neuroprotection, glaucoma, seasonal affective disorder, aging, neurodegenerative diseases, sleep disorders
MeSH terms
Melanopsin, Humans, Retinal Diseases, Retinal Ganglion Cells, Visual Pathways, Seasonal Affective Disorder, Rod Opsins, Photophobia, Mitochondrial Diseases

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