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01.04.2013 | Review

Melatonin Antioxidative Defense: Therapeutical Implications for Aging and Neurodegenerative Processes

verfasst von: Seithikurippu R. Pandi-Perumal, Ahmed S. BaHammam, Gregory M. Brown, D. Warren Spence, Vijay K. Bharti, Charanjit Kaur, Rüdiger Hardeland, Daniel P. Cardinali

Erschienen in: Neurotoxicity Research | Ausgabe 3/2013

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Abstract

The pineal product melatonin has remarkable antioxidant properties. It is secreted during darkness and plays a key role in various physiological responses including regulation of circadian rhythms, sleep homeostasis, retinal neuromodulation, and vasomotor responses. It scavenges hydroxyl, carbonate, and various organic radicals as well as a number of reactive nitrogen species. Melatonin also enhances the antioxidant potential of the cell by stimulating the synthesis of antioxidant enzymes including superoxide dismutase, glutathione peroxidase, and glutathione reductase, and by augmenting glutathione levels. Melatonin preserves mitochondrial homeostasis, reduces free radical generation and protects mitochondrial ATP synthesis by stimulating Complexes I and IV activities. The decline in melatonin production in aged individuals has been suggested as one of the primary contributing factors for the development of age-associated neurodegenerative diseases. The efficacy of melatonin in preventing oxidative damage in either cultured neuronal cells or in the brains of animals treated with various neurotoxic agents, suggests that melatonin has a potential therapeutic value as a neuroprotective drug in treatment of Alzheimer’s disease (AD), Parkinson’s disease (PD), amyotrophic lateral sclerosis (ALS), Huntington’s disease (HD), stroke, and brain trauma. Therapeutic trials with melatonin indicate that it has a potential therapeutic value as a neuroprotective drug in treatment of AD, ALS, and HD. In the case of other neurological conditions, like PD, the evidence is less compelling. Melatonin’s efficacy in combating free radical damage in the brain suggests that it can be a valuable therapeutic agent in the treatment of cerebral edema following traumatic brain injury or stroke. Clinical trials employing melatonin doses in the range of 50–100 mg/day are warranted before its relative merits as a neuroprotective agent is definitively established.

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Titel: Melatonin Antioxidative Defense: Therapeutical Implications for Aging and Neurodegenerative Processes
verfasst von: Seithikurippu R. Pandi-Perumal
Ahmed S. BaHammam
Gregory M. Brown
D. Warren Spence
Vijay K. Bharti
Charanjit Kaur
Rüdiger Hardeland
Daniel P. Cardinali
Publikationsdatum: 01.04.2013
Verlag: Springer-Verlag
Erschienen in: Neurotoxicity Research / Ausgabe 3/2013
Print ISSN: 1029-8428
Elektronische ISSN: 1476-3524
DOI: https://doi.org/10.1007/s12640-012-9337-4

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