Melatonin: Perbedaan antara revisi
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'''Melatonin''' ({{lang-en|melatonin, N-acetyl-5-methoxytryptamine}}) adalah [[hormon]] neurotropik dengan [[gugus fungsional|gugus]] [[antioksidan]] [[indolamina]],<ref>{{en}} {{cite web
| url = http://www.ncbi.nlm.nih.gov/pubmed/15992934
| title = Molecular tools to study melatonin pathways and actions
| accessdate = 2010-10-26
| work = Pharmacologie Moléculaire et Cellulaire, Institut de Recherches Servier; Boutin JA, Audinot V, Ferry G, Delagrange P.
}}</ref> yang disintesis oleh [[kelenjar pineal]] yang terletak di dalam [[otak]] dari [[senyawa organik|senyawa]] [[asam amino]] [[triptofan]].<ref>{{en}} {{cite web
| url = http://www.sleepdex.org/melatonin.htm
| title = Melatonin
| accessdate = 2010-10-26
| work = Sleepdex
}}</ref> Melalui pencerapnya, melatonin berperan dalam berbagai proses [[fisiologi]]s seperti [[ritme biologis]], regulasi [[tekanan darah]], [[onkogenesis]], [[retina]], reproduksi, [[ovarium]], [[sistem kekebalan]] dan [[diferensiasi]] [[osteoblas]].<ref>{{en}} {{cite web
| url = http://www.ncbi.nlm.nih.gov/pubmed/17298593
| title = Melatonin: therapeutic and clinical utilization
| accessdate = 2010-10-26
| work = Department of Cardiology, Medical School, Trakya University; Altun A, Ugur-Altun B.
}}</ref> [[Transduksi sinyal selular|transduksi sinyal]] pada lintasan melatonin meningkatkan rasio [[enzim]] antioksidan seperti [[superoksida dismutase]], [[peroksidase]], [[glutathion]] dan meredam enzim prooksidan seperti [[nitrogen monoksida sintase]] dan [[liposigenase]].<ref>{{en}} {{cite web
| url = http://www.ncbi.nlm.nih.gov/pubmed/16217125
| title = Antioxidative protection by melatonin: multiplicity of mechanisms from radical detoxification to radical avoidance
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