Cited by 172Circadian rhythm and melatoninMitochondrial Function and Pathologymelanin and skin pigmentation

Mitochondria: the birth place, battle ground and the site of melatonin metabolism in cells

Open access
Tan, Dun-Xian, Reiter, Russel. J.·2019·Melatonin Research

Abstract

It was a surprising discovery when mitochondria, as the power houses of cells, were also found to synthesize the potent mitochondrial targeted antioxidant, melatonin. The melatonin synthetic enzyme serotonin N-acetyltransferase (SNAT) was found in matrix and also in the intermembrane space of mitochondria. We hypothesize that the melatonin synthesis occurs in the matrix due to substrate (N-acetyl co-enzyme A) availability while the intermembrane space may serve as the recycling pool of SNAT to regulate the melatonin circadian rhythm. Another surprise was that the melatonin membrane receptors, including MT1 and MT2, were also present in mitochondria. The protective effects of melatonin against neuronal injury induced by brain ischemia/reperfusion were proven to be mainly mediated by mitochondrial melatonin receptors rather than the cell surface membrane receptors which is contrary to the classical principle. In addition, melatonin metabolic enzyme has also been identified in the mitochondria. This enzyme can convert melatonin to N-acetylserotonin to strengthen the antitumor effects of melatonin. Thus, mitochondria are the generator, battle ground and metabolic sites of melatonin. The biological significance of the strong association between mitochondria and melatonin should be intensively investigated.

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Crossref · 10.32794/mr11250011

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Authors
Tan, D.-X., & Reiter, R. J.
Affiliations
The University of Texas at San Antonio Health Science Center (US)
Venue
Melatonin Research
Publisher
ST Bio-life
Published
2019-02-28
Volume
2
Issue
1
Pages
44-66
ISSN
2641-0281 (ISSN-L)
OpenAlex
W2919912171
Cited by
172
References
168
Citations by year
2026: 4 · 2025: 5 · 2024: 12 · 2023: 20 · 2022: 20 · 2021: 38 · 2020: 41 · 2019: 32
FWCI
18.08
Type
journal article
Language
en
Open access
Locations
Melatonin Research (publishedVersion, cc-by)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
Keywords
melatonin synthesis, mitochondria, serotonin N-acetyltransferase, mitochondrial matrix, intermembrane space, melatonin receptors, MT1 receptor, MT2 receptor, cerebral ischemia-reperfusion injury, neuronal injury, N-acetylserotonin, melatonin metabolism, circadian rhythm, anticancer activity

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