Effects of Hange-shashin-to on Cholera Toxin-Induced Fluid Secretion in the Small Intestine of Rats

概要

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The effects of Hange-shashin-to (TJ-14) on cholera toxin-induced intestinal fluid secretion were studied to elucidate the mechanism by which this kampo medicine manifests antidiarrheal effects. TJ-14 suppressed the intestinal fluid secretion induced by cholera toxin (1 μg/rat) in a dose-dependent manner at doses between 125 and 1000 mg/kg. It also inhibited the luminal prostaglandin E_2 (PGE_2) level. On the other hand, serotonin (5-HT) release was not affected by TJ-14. Subcutaneous injection of indomethacin at 10 mg/kg or ondansetron at 100 μg/kg significantly suppressed intestinal secretion. The luminal PGE_2 level was also inhibited by indomethacin (10 mg/kg, s.c.). TJ-14,even at 10^<-4> g/ml, and little effect on the phasic contration of isolated guinea pig ileum induced by 5-HT (2×10^<-6> g/ml), while ondansetron suppressed the phasic contraction caused by 5-HT.These results indicate that TJ-14 is useful in suppressing cholera toxin-stimulated intestinal fluid secretion, and that this effect is partially due to its suppressive action on the PGE_2 level.
社団法人日本薬学会の論文
1998-02-15