Journal
JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY
Volume 23, Issue 6, Pages 871-876Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14756360701626223
Keywords
Melatonin; serotonin; radical scavenging; DMPD; Cuprac method
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Melatonin (N-acetyl-5-methoxytryptamine) is the chief secretory product of the pineal gland and synthesized enzymatically from serotonin (5-hydroxytryptamine). These indoleamine derivatives play an important role in the prevention of oxidative damage. In the present study, DMPD radical scavenging and cupric ion (Cu2+) reducing ability of melatonin and serotonin as trolox equivalent antioxidant activity (TEAC) was investigated. Melatonin and serotonin demonstrated 73.5 and 127.4g/mL trolox equivalent DMPD+ scavenging activity at the concentration of 100g/mL. Also, at the same concentration, melatonin and serotonin showed 14.41 and 116.09g/mL trolox equivalent cupric ion (Cu2+) reducing ability. These results showed that melatonin and serotonin had marked DMPD+ radical scavenging and cupric ions (Cu2+) reducing ability. Especially, serotonin had higher DMPD radical scavenging and cupric ions (Cu2+) reducing activity than melatonin because of its phenolic group.
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