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Biological and Pharmaceutical Bulletin 2003-Jul

Inhibition of experimental allergic rhinitis by the n-butanol fraction from the anomalous fruits of Gleditsia sinensis.

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Lin-Jun Fu
Yue Dai
Zheng-Tao Wang
Mian Zhang

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Abstrakt

This study was conducted to clarify the effect of the n-butanol fraction from the anomalous fruits of Gleditsia sinensis LAM. (NBGS) on experimental allergic rhinitis. NBGS (100, 200, 400 mg/kg, p.o.) dose-dependently inhibited nasal symptoms (sneezing and nasal rubbing) and dye leakage induced by antigen challenge into the nasal cavity of actively sensitized rats. Significant effects were observed at doses of 200 and 400 mg/kg. NBGS (200, 400 mg/kg) also showed a clear inhibition of sneezing and an inhibitory tendency on nasal rubbing induced by histamine in normal rats. At 400 mg/kg, it significantly reduced dye leakage induced by histamine into the nasal cavity of rats. Terfenadine (10 mg/kg, p.o.), an antihistaminic drug, clearly inhibited the nasal symptoms and the amount of dye leakage induced by antigen or histamine. Furthermore, NBGS significantly reduced in vitro histamine release from rat peritoneal mast cells triggered by compound 48/80 at concentrations of 30 and 100 microg/ml. These results suggest that NBGS may be clinically effective in alleviating the nasal symptoms of allergic rhinitis, probably by inhibiting both histamine release from mast cells and nasal vascular permeability.

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