title: Effect of a dosing-time on quetiapine-induced acute hyperglycemia in mice.
abstract: Although rare, second-generation antipsychotic drugs cause severe hyperglycemia within several days after the initiation of therapy. Because glucose tolerance exhibits circadian rhythmicity, we evaluated an effect of a dosing-time on quetiapine-induced acute hyperglycemia in mice. A single intraperitoneal dose of quetiapine dosing-time-independently induced insulin resistance in fasted C57BL/6J mice. However, acute hyperglycemic effect was detected only after dosing of the drug at the beginning of an active phase. Under the conditions in which hepatic glucose production was stimulated by pyruvate administration, hyperglycemic effect of quetiapine was dosing-time-independently observed. In addition, the dosing-time-dependent hyperglycemic effect of quetiapine disappeared in the liver-specific circadian clock-disrupted mice in which circadian rhythmicity in hepatic glucose production is deranged. Furthermore, the dosing-time had little impact on the pharmacokinetics of quetiapine in normal mice. These results suggest that quetiapine acutely causes hyperglycemia only when hepatic glucose production elevates. Therefore, quetiapine therapy with once daily dosing at a rest phase might be safer than that at an active phase. Further studies are needed to confirm the hypothesis.
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Snehal
authors.initials: S
authors.lastname: Kapse
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Ando
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Fujiwara
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Chisato
authors.initials: C
authors.lastname: Suzuki
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Ushijima
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Kitamura
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Hosohata
authors.affiliation: Division of Community and Family Medicine, Center for Community Medicine, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kotani
authors.affiliation: Department of Health Science, School of Pharmacy, Nihon University, Funabashi, Japan.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Shimba
authors.affiliation: Division of Clinical Pharmacology, Department of Pharmacology, School of Medicine, Jichi Medical University, Shimotsuke, Japan. Electronic address: akiofuji@jichi.ac.jp.
authors.forename: Akio
authors.initials: A
authors.lastname: Fujimura
mesh_terms: D000818:Animals; D014150:Antipsychotic Agents / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics; D001786:Blood Glucose / Q000032:analysis; D004305:Dose-Response Relationship, Drug; D005947:Glucose / Q000378:metabolism; D006943:Hyperglycemia / Q000097:blood / Q000139:chemically induced*; D007333:Insulin Resistance; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D000069348:Quetiapine Fumarate / Q000008:administration & dosage* / Q000097:blood / Q000493:pharmacokinetics
chemical_list: D014150:Antipsychotic Agents; D001786:Blood Glucose; D000069348:Quetiapine Fumarate; D005947:Glucose
keywords: Antipsychotic drugs; Chronotherapy; Circadian rhythm; Hyperglycemia; Quetiapine