Effects of a polysaccharide fraction from the roots of Bupleurum falcatum L. on experimental gastric ulcer models in rats and mice.
Effects of an acidic polysaccharide fraction, BR-2, from the roots of Bupleurum falcatum L., on HCl-ethanol, ethanol and water immersion stress-induced gastric lesions in mice and pylorus-ligated ulcers in rats have been studied. Oral administration of BR-2 at doses of 50 to 200 mg kg-1 inhibited the formation of the gastric lesions induced by necrotizing agents such as HCl-ethanol and ethanol, in a dose dependent manner. This protective effect was observed after oral, intraperitoneal, and subcutaneous administration of BR-2 (25-100 mg kg-1). BR-2 also inhibited the formation of gastric ulcers which were induced by water immersion stress or pylorus-ligation. Prostaglandin E2 in gastric juice from rats and in gastric mucosa from mice was not influenced by oral administration of BR-2. The protective action of BR-2 against HCl-ethanol-induced gastric lesions was not abolished by pretreatment with indomethacin (20 mg kg-1, i.p.). The amount of alcian blue binding to mucosa also increased after administration of BR-2 (100 mg kg-1, p.o.); however, the amount of hexosamine and N-acetylneuraminic acid in mucosa did not change significantly.
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Oriental Medicine Research Center, Kitasato Institute, Tokyo, Japan.
Matsumoto
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Yamada
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D000818:Animals; D000897:Anti-Ulcer Agents / Q000494:pharmacology*; D004195:Disease Models, Animal; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D005753:Gastric Mucosa / Q000187:drug effects; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D011134:Polysaccharides / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013276:Stomach Ulcer / Q000188:drug therapy*
D000897:Anti-Ulcer Agents; D004365:Drugs, Chinese Herbal; D011134:Polysaccharides