title: Effects of chlorogenic acid and its metabolites on the sleep-wakefulness cycle in rats.
abstract: The effect of chlorogenic acid on the sleep-wakefulness cycle in rats was investigated in comparison with those of caffeic acid (the metabolite of chlorogenic acid) and dihydrocaffeic acid (the metabolite of caffeic acid). A significant prolongation of sleep latency was observed with chlorogenic acid and caffeic acid at a dose of 500 and 200 mg/kg, respectively. On the other hand, no remarkable effects were observed with dihydrocaffeic acid even at a dose of 500 mg/kg. Caffeine caused a significant increase in sleep latency and waking time and decrease in non-rapid eye movement sleep time at a dose of 10 mg/kg. In contrast, chlorogenic acid and its metabolites had no significant effects on each sleep state. From these results, it may be concluded that chrologenic acid caused a mild arousal effect compared with that of caffeine, and the effect of chlorogenic acid may have occurred through its metabolite caffeic acid.
authors.affiliation: Department of Pharmacology, Faculty of Pharmaceutical Sciences, Okayama University, Tsushima-naka 1-1-1, Okayama 700-8530, Japan.
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Shinomiya
authors.forename: Junji
authors.initials: J
authors.lastname: Omichi
authors.forename: Ryoko
authors.initials: R
authors.lastname: Ohnishi
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Ito
authors.forename: Takashi
authors.initials: T
authors.lastname: Yoshida
authors.forename: Chiaki
authors.initials: C
authors.lastname: Kamei
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D002109:Caffeic Acids / Q000494:pharmacology; D002110:Caffeine / Q000494:pharmacology; D000697:Central Nervous System Stimulants / Q000494:pharmacology; D002726:Chlorogenic Acid / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004569:Electroencephalography / Q000187:drug effects; D004576:Electromyography / Q000187:drug effects; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012890:Sleep / Q000187:drug effects*; D012895:Sleep, REM / Q000187:drug effects; D014851:Wakefulness / Q000187:drug effects*
chemical_list: D000975:Antioxidants; D002109:Caffeic Acids; D000697:Central Nervous System Stimulants; C000995:3,4-dihydroxyphenylpropionic acid; D002726:Chlorogenic Acid; D002110:Caffeine; C040048:caffeic acid