Cited by 54Circadian rhythm and melatoninmelanin and skin pigmentationEffects of Radiation Exposure

Melatonin and Its Metabolites Ameliorate UVR-Induced Mitochondrial Oxidative Stress in Human MNT-1 Melanoma Cells

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Kleszczyński, Konrad, Bilska, Bernadetta, Stegemann, Agatha, Flis, Damian Jozef, Ziolkowski, Wieslaw, Pyza, Elżbieta, Luger, Thomas A., Reiter, Russel J. +2 more·2018·International Journal of Molecular Sciences

Abstract

Melatonin (Mel) is the major biologically active molecule secreted by the pineal gland. Mel and its metabolites, 6-hydroxymelatonin (6(OH)Mel) and 5-methoxytryptamine (5-MT), possess a variety of functions, including the scavenging of free radicals and the induction of protective or reparative mechanisms in the cell. Their amphiphilic character allows them to cross cellular membranes and reach subcellular organelles, including the mitochondria. Herein, the action of Mel, 6(OH)Mel, and 5-MT in human MNT-1 melanoma cells against ultraviolet B (UVB) radiation was investigated. The dose of 50 mJ/cm2 caused a significant reduction of cell viability up to 48%, while investigated compounds counteracted this deleterious effect. UVB exposure increased catalase activity and led to a simultaneous Ca++ influx (16%), while tested compounds prevented these disturbances. Additional analysis focused on mitochondrial respiration performed in isolated mitochondria from the liver of BALB/cJ mice where Mel, 6(OH)Mel, and 5-MT significantly enhanced the oxidative phosphorylation at the dose of 10−6 M with lower effects seen at 10−9 or 10−4 M. In conclusion, Mel, 6(OH)Mel and 5-MT protect MNT-1 cells, which express melatonin receptors (MT1 and MT2) against UVB-induced oxidative stress and mitochondrial dysfunction, including the uncoupling of oxidative phosphorylation.

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Authors
Kleszczyński, K., Bilska, B., Stegemann, A., Flis, D. J., Ziolkowski, W., Pyza, E., Luger, T. A., Reiter, R. J., Böhm, M., & Slominski, A. T.
Affiliations
  • University of Münster (DE)
  • Jagiellonian University (PL)
  • Department of Bioenergetics and Nutrition, Gdańsk University of Physical Education and Sport, Górski Str. 1, 80-336 Gdańsk, Poland
  • The University of Texas at San Antonio Health Science Center (US)
  • University of Alabama at Birmingham (US)
Corresponding author
  • Kleszczyński, Konrad
  • Slominski, Andrzej T.
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2018-11-28
Volume
19
Issue
12
Pages
3786
ISSN
1422-0067 (ISSN-L)
OpenAlex
W2902234339
Cited by
54
References
94
Citations by year
2026: 2 · 2025: 6 · 2024: 3 · 2023: 8 · 2022: 8 · 2021: 9 · 2020: 8 · 2019: 9
FWCI
3.66
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Homo Politicus (Academy of Humanities and Economics in Lodz) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Deutsche Forschungsgemeinschaft (KL2900/2-1)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
Keywords
melatonin, 6-hydroxymelatonin, 5-methoxytryptamine, UV-B radiation, melanoma, mitochondrial oxidative stress, mitochondrial dysfunction, oxidative phosphorylation, catalase activity, calcium influx, melatonin receptors, photoprotection
MeSH terms
Animals, Calcium, Catalase, Cell Survival, Humans, Liver, Melanoma, Melatonin, 5-Methoxytryptamine, Mice, Inbred BALB C, Mitochondria, Oxidative Phosphorylation, Ultraviolet Rays, Oxidative Stress, Cell Line, Tumor

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