Cited by 298Circadian rhythm and melatoninReceptor Mechanisms and SignalingNeuropeptides and Animal Physiology

Melatonin receptors, heterodimerization, signal transduction and binding sites: what's new?

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Jockers, R, Maurice, P, Boutin, J A, Delagrange, P·2008·British Journal of Pharmacology

Abstract

Melatonin is a neurohormone that has been claimed to be involved in a wide range of physiological functions. Nevertheless, for most of its effects, the mechanism of action is not really known. In mammals, two melatonin receptors, MT 1 and MT 2, have been cloned. They belong to the G‐protein‐coupled receptor (GPCR) superfamily. They share some specific short amino‐acid sequences, which suggest that they represent a specific subfamily. Another receptor from the same subfamily, the melatonin‐related receptor has been cloned in different species including humans. This orphan receptor also named GPR50 does not bind melatonin and its endogenous ligand is still unknown. Nevertheless, this receptor has been shown to behave as an antagonist of the MT 1 receptor, which opens new pharmacological perspectives for GPR50 despite the lack of endogenous or synthetic ligands. Moreover, MT 1 and MT 2 interact together through the formation of heterodimers at least in cells transfected with the cDNA of these two receptors. Lastly, signalling complexes associated with MT 1 and MT 2 receptors are starting to be deciphered. A third melatonin‐binding site has been purified and characterized as the enzyme quinone reductase 2 (QR2). Inhibition of QR2 by melatonin may explain melatonin's protective effect that has been reported in different animal models and that is generally associated with its well‐documented antioxidant properties. British Journal of Pharmacology(2008)154, 1182–1195; doi:10.1038/bjp.2008.184; published online 19 May 2008

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Crossref · 10.1038/bjp.2008.184

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Authors
Jockers, R., Maurice, P., Boutin, J. A., & Delagrange, P.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Institut de Recherches Internationales Servier (France) (FR)
Corresponding author
Delagrange, P
Venue
British Journal of Pharmacology
Publisher
Wiley
Published
2008-07
Volume
154
Issue
6
Pages
1182-1195
ISSN
  • 0007-1188 (ISSN-L)
  • 1476-5381
OpenAlex
W2106497761
Cited by
293
References
179
Citations by year
2026: 4 · 2025: 7 · 2024: 14 · 2023: 17 · 2022: 19 · 2021: 18 · 2020: 17 · 2019: 20 · 2018: 16 · 2017: 12 · 2016: 10 · 2015: 11 · 2014: 25 · 2013: 20 · 2012: 22
FWCI
2.21
Type
journal article
Language
en
Open access
Locations
  • British Journal of Pharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • Association pour la Recherche sur le Cancer
  • Fondation pour la Recherche Médicale
  • Fédération pour la Recherche sur le Cerveau
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
melatonin receptors, MT1 receptor, MT2 receptor, GPR50, G protein-coupled receptors, receptor heterodimerization, signal transduction, quinone reductase 2, melatonin binding sites, antioxidant activity, receptor antagonism
MeSH terms
Animals, Binding Sites, Humans, Nerve Tissue Proteins, Tissue Distribution, Signal Transduction, Dimerization, Receptors, G-Protein-Coupled, Receptors, Melatonin, Receptor, Melatonin, MT1, Receptor, Melatonin, MT2

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