- P-ISSN 1010-0695
- E-ISSN 2288-3339
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- P-ISSN1010-0695
- E-ISSN2288-3339
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Antipruritic Effects of Puerariae Radix on 5-HT or AEW-Induced Itch Behavior in Mice
Journal of Korean Medicine / Journal of Korean Medicine, (P)1010-0695; (E)2288-3339
2007, v.28 no.3, pp.165-172
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(2007). Antipruritic Effects of Puerariae Radix on 5-HT or AEW-Induced Itch Behavior in Mice. Journal of Korean Medicine, 28(3), 165-172.
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Abstract
Objectives: To find antipruritic herbal medicines, we screened the water extracts of four herbal medicines which have been frequently prescribed to treat dermatologic diseases in oriental medicine. Methods: Water extracts of Bupleuri Radix, Scutellariae Radix, Cimicifugae Rhizoma and Puerariae Radix were administered at a dose of 300 mg/kg to male ICR mice. 1 hour later, serotonin hydrochloride dissolved in physiologic saline at a concentration of 100 nmol / 50 ㎕ was administered intradermally to the nape of the neck at a dose of 50 ㎕. Then the scratching behavior was observed. Dry skin pruritus was induced with cutaneous application of acetone / ether (1:1) mixture and water (AEW) to the rostral back of male ICR mice, twice a day for 5 days. 14 hours after the last application, the most effective material in the first experiment was administered perorally at doses of 75, 150, 300, 600 and 1200 mg/kg. 1 hour later, the scratching behavior was observed. Results: Water extracts of Puerariae Radix significantly inhibited the serotonin-induced scratching behavior and the mean of scratching bouts was reduced by half compared with the control group. Bupleuri Radix group also showed a 29% decrease in the mean of scratching bouts, but there was no statistical significance. Water extracts of Puerariae Radix also inhibited the AEW-induced scratching behavior, in a dose-dependent manner. The dose of 150 mg/kg showed the highest and statistically significant antipruritic effect. Conclusions: These results suggest that Puerariae Radix and its constituents have antipruritic effect, and are new candidates as antipruritic agents.
- keywords
- herbal medicine, Puerariae Radix, itch, scratching, serotonin, dermatitis, herbal medicine, Puerariae Radix, itch, scratching, serotonin, dermatitis
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