Cited by 178Circadian rhythm and melatoninRetinal Development and Disordersmelanin and skin pigmentation

The mammalian pineal gland: known facts, unknown facets

Maronde, Erik, Stehle, Jörg H.·2007·Trends in Endocrinology & Metabolism

Abstract

In the mammalian pineal gland, information on environmental lighting conditions that is neuronally encoded by the retina is converted into nocturnally elevated synthesis of the hormone melatonin. Evolutionary pressure has changed the morphology of vertebrate pinealocytes, eliminating direct photoreception and the endogenous clock function. Despite these changes, nocturnally elevated melatonin synthesis has remained a reliable indicator of time throughout evolution. In the photo-insensitive mammalian pineal gland this message of darkness depends on the master circadian pacemaker in the hypothalamic suprachiasmatic nuclei. The dramatic change in vertebrate pinealocytes has received little attention; here, we therefore link the known evolutionary morphodynamics and well-investigated biochemical details responsible for rhythmic synthesis of melatonin with recently characterized patterns of gene expression in the pineal gland. We also address the enigmatic function of clockwork molecules in mammalian pinealocytes.

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Crossref · 10.1016/j.tem.2007.03.001

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  • The 262 Pineal Crx Glut subclass has particularly strong circadian gene expression fluctuations.

    “The 262 Pineal Crx Glut subclass, located in the dorsal part of the third ventricle and on top of superior colliculus (SC) in the MERFISH data, which probably represents the pinealocytes that evolved from photoreceptor cells and secret melatonin116, has particularly strong circadian gene expression fluctuations (Extended Data Fig. 18b,c).”

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Authors
Maronde, E., & Stehle, J. H.
Affiliations
Goethe University Frankfurt (DE)
Corresponding author
Stehle, Jörg H.
Venue
Trends in Endocrinology & Metabolism
Publisher
Elsevier BV
Published
2007-05
Volume
18
Issue
4
Pages
142-149
ISSN
1043-2760 (ISSN-L)
OpenAlex
W2073145669
Cited by
178
References
82
Citations by year
2026: 3 · 2025: 9 · 2024: 4 · 2023: 8 · 2022: 12 · 2021: 7 · 2020: 12 · 2019: 9 · 2018: 11 · 2017: 9 · 2016: 12 · 2015: 10 · 2014: 10 · 2013: 4 · 2012: 8
FWCI
1.26
Type
journal article
Language
en
Open access
closed
Locations
  • Trends in Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
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 › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
Keywords
pineal gland, melatonin synthesis, pinealocytes, circadian clock, suprachiasmatic nucleus, photoreception, gene expression, clock genes, mammalian evolution
MeSH terms
Animals, Biological Clocks, Circadian Rhythm, Biological Evolution, Humans, Light, Melatonin, Nerve Tissue Proteins, Pineal Gland

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