Melatonin facts: Lack of evidence that melatonin is a radical scavenger in living systems.

Boutin, Jean A.; Liberelle, Maxime; Yous, Said; Ferry, Gilles; Nepveu, Françoise

Document type :

Article dans une revue scientifique: Article de synthèse/Review paper

DOI :

10.1111/jpi.12926

PMID :

38146602

Permalink :

http://hdl.handle.net/20.500.12210/103214

Title :

Melatonin facts: Lack of evidence that melatonin is a radical scavenger in living systems.

Author(s) :

Boutin, Jean A. [Auteur]
Neuroendocrine, Endocrine and Germinal Differentiation Communication [NorDic]
Liberelle, Maxime [Auteur]

Lille Neurosciences & Cognition (LilNCog) - U 1172
Yous, Said [Auteur]

Lille Neurosciences & Cognition (LilNCog) - U 1172
Ferry, Gilles [Auteur]
Nepveu, Françoise [Auteur]
Pharmacochimie et Biologie pour le Développement [PHARMA-DEV]

Journal title :

Journal of Pineal Research

Abbreviated title :

J Pineal Res

Volume number :

Pages :

e12926

Publication date :

2024-01-01

ISSN :

1600-079X

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

Melatonin is a small natural compound, so called a neuro-hormone that is synthesized mainly in pineal gland in animals. Its main role is to master the clock of the body, under the surveillance of light. In other words, it ...
Show more >Melatonin is a small natural compound, so called a neuro-hormone that is synthesized mainly in pineal gland in animals. Its main role is to master the clock of the body, under the surveillance of light. In other words, it transfers the information concerning night and day to the peripheral organs which, without it, could not “know” which part of the circadian rhythm the body is in. Besides its main circadian and circannual rhythms mastering, melatonin is reported to be a radical scavenger and/or an antioxidant. Because radical scavengers are chemical species able to neutralize highly reactive and toxic species such as reactive oxygen species, one would like to transfer this property to living system, despite impossibilities already largely reported in the literature. In the present commentary, we refresh the memory of the readers with this notion of radical scavenger, and review the possible evidence that melatonin could be an in vivo radical scavenger, while we only marginally discuss here the fact that melatonin is a molecular antioxidant, a feature that merits a review on its own. We conclude four things: (i) the evidence that melatonin is a scavenger in acellular systems is overwhelming and could not be doubted; (ii) the transposition of this property in living (animal) systems is (a) theoretically impossible and (b) not proven in any system reported in the literature where most of the time, the delay of the action of melatonin is over several hours, thus signing a probable induction of cellular enzymatic antioxidant defenses; (iii) this last fact needs a confirmation through the discovery of a nuclear factor—a key relay in induction processes—that binds melatonin and is activated by it and (iv) we also gather the very important description of the radical scavenging capacity of melatonin in acellular systems that is now proven and shared by many other double bond-bearing molecules. We finally discussed briefly on the reason—scientific or else—that led this description, and the consequences of this claim, in research, in physiology, in pathology, but most disturbingly in therapeutics where a vast amount of money, hope, and patient bien-être are at stake.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
Inserm
CHU Lille

Collections :

Lille Neurosciences & Cognition (LilNCog) - U 1172

Submission date :

2024-01-18T22:05:23Z
2024-06-07T12:21:08Z

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Version	Link	Modification date
2	20.500.12210/103214*	2024-06-07T12:17:02Z
1	20.500.12210/103214.1	2024-01-18T22:05:23Z

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