Format

Send to

Choose Destination
Exp Anim. 2016 Nov 1;65(4):353-361. Epub 2016 May 30.

Influences of yokukansankachimpihange on aggressive behavior of zinc-deficient mice and actions of the ingredients on excessive neural exocytosis in the hippocampus of zinc-deficient rats.

Author information

1
Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52- 1 Yada, Shizuoka 422-8526, Japan.

Abstract

We examined the effect of Yokukansankachimpihange (YKSCH), a form of Yokukansan containing parts of two herbaceous plants, Citrus Unshiu Peel (Chimpi) and Pinellia Tuber (Hange), on aggressive behavior of mice housed individually. Mice were fed a zinc-deficient diet for 2 weeks. In a resident-intruder test, the cumulative duration of aggressive behavior was decreased in zinc-deficient mice administrated drinking water containing YKSCH (approximately 300 mg/kg body weight/day) for 2 weeks. We tested mice for geissoschizine methyl ether (GM), which is contained in Uncaria Hook, and 18β-glycyrrhetinic acid (GA), a major metabolite of glycyrrhizin contained in Glycyrrhiza, which were contained in YKS and YKSCH. In hippocampal slices from zinc-deficient rats, excess exocytosis at mossy fiber boutons induced with 60 mM KCl was attenuated in the presence of GA (100-500 µM) or GM (100 µM). The intracellular Ca2+ level, which showed an increase induced by 60 mM KCl, was also attenuated in the presence of GA (100-500 µM) or GM (100 µM). These results suggest that GA and GM ameliorate excess glutamate release from mossy fiber boutons by suppressing the increase in intracellular Ca2+ signaling. These ameliorative actions may contribute to decreasing the aggressiveness of mice individually housed under zinc deficiency, potentially by suppressing excess glutamatergic neuron activity in the hippocampus.

Supplemental Content

Full text links

Icon for J-STAGE, Japan Science and Technology Information Aggregator, Electronic Icon for PubMed Central
Loading ...
Support Center