title: Antidepressant-like effects of liquiritin and isoliquiritin from Glycyrrhiza uralensis in the forced swimming test and tail suspension test in mice.
abstract: Two classic animal behavior despair tests--the Forced Swimming Test (FST) and the Tail Suspension Test (TST) were used to evaluate the antidepressant activity of liquiritin and isoliquiritin from Glycyrrhiza uralensis in mice. It was observed that both liquiritin and isoliquiritin at doses of 10, 20 and 40 mg/kg significantly reduced the immobility time in the FST and TST in mice 30 min after treatment. Measurement of locomotor activity indicated that liquiritin and isoliquiritin had no central nervous system (CNS)-stimulating effects. The main monoamine neurotransmitters and their metabolites in mouse brain regions were also simultaneously determined by HPLC-ECD. It was found that these two compounds significantly increased the concentrations of the main neurotransmitters 5-HT and NE in the hippocampus, hypothalamus and cortex. Liquiritin and isoliquiritin also significantly reduced the ratio of 5-HIAA/5-HT in the hippocampus, hypothalamus and cortex, slowing down 5-HT metabolism compared with mice treated with vehicle+stress. In conclusion, liquiritin and isoliquiritin produced significant antidepressant-like effects, and their mechanism of action may be due to increased 5-HT and NE in the mouse hippocampus, hypothalamus and cortex.
authors.affiliation: School of Pharmaceutical Sciences, Peking University, Beijing, China.
authors.forename: Weixing
authors.initials: W
authors.lastname: Wang
authors.forename: Xinying
authors.initials: X
authors.lastname: Hu
authors.forename: Zhiyu
authors.initials: Z
authors.lastname: Zhao
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Yuchi
authors.initials: Y
authors.lastname: Hu
authors.forename: Jianping
authors.initials: J
authors.lastname: Zhou
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Zhou
authors.forename: Zhibin
authors.initials: Z
authors.lastname: Wang
authors.forename: Dean
authors.initials: D
authors.lastname: Guo
authors.forename: Hongzhu
authors.initials: H
authors.lastname: Guo
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000928:Antidepressive Agents / Q000494:pharmacology*; D001522:Behavior, Animal / Q000187:drug effects; D001923:Brain Chemistry / Q000187:drug effects; D002599:Chalcone / Q000031:analogs & derivatives* / Q000737:chemistry / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D044950:Flavanones / Q000737:chemistry / Q000494:pharmacology*; D005960:Glucosides / Q000737:chemistry / Q000494:pharmacology*; D029882:Glycyrrhiza uralensis / Q000737:chemistry*; D019417:Hindlimb Suspension / Q000379:methods; D046353:Immobility Response, Tonic / Q000187:drug effects*; D051379:Mice; D009043:Motor Activity / Q000187:drug effects; D018377:Neurotransmitter Agents / Q000378:metabolism; D013550:Swimming
chemical_list: D000928:Antidepressive Agents; D044950:Flavanones; D005960:Glucosides; D018377:Neurotransmitter Agents; C098467:neoisoliquiritin; D002599:Chalcone; C512196:liquiritin