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- W1999059100 abstract "Nonsteroidal anti-inflammatory drugs (NSAIDs) such as indomethacin produce damage in the small intestine as a major adverse reaction. We examined the effect of various NSAIDs on intestinal motility and investigated the pathogenic importance of motility changes in the intestinal ulcerogenic response to indomethacin in rats.Animals without fasting were given various NSAIDs (indomethacin 10 mg/kg, diclofenac 40 mg/kg, flurbiprofen 20 mg/kg, naproxen 40 mg/kg) s.c., and in the case of indomethacin, the following parameters were examined in the small intestine 24 h later; the lesion score, the number of enterobacteria and myeloperoxidase (MPO) as well as inducible nitric oxide (iNOS) activity. Intestinal motility was monitored as intraluminal pressure recordings using a balloon under anesthesia.All NSAIDs tested decreased mucosal PGE(2) levels and produced hemorrhagic lesions in the small intestine, accompanied by intestinal hypermotility. As representative of NSAIDs, indomethacin also increased the extent of enterobacterial invasion and MPO as well as iNOS activity before the occurrence of intestinal damage, and the hypermotility response was observed earlier than the onset of any other event caused by this agent. The intestinal lesions induced by indomethacin were prevented by either supplementation with dmPGE(2), inhibition of bacterial invasion with ampicillin or inhibition of iNOS activity with aminoguanidine, while the hypermotility response was prevented by dmPGE(2) only. In addition, the observed effects of dmPGE(2) were all mimicked by atropine when the intestinal hypermotility was suppressed by this agent.These results suggest the pathogenic importance of intestinal hypermotility in the intestinal ulcerogenic response to NSAIDs in rats and show that this event is critical for the occurrence of enterobacterial invasion under PG deficiency, followed by various inflammatory changes and damage in the mucosa. This study also suggests that the antispasmodic drug is protective against NSAID-induced intestinal lesions." @default.
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- W1999059100 date "2002-01-01" @default.
- W1999059100 modified "2023-10-17" @default.
- W1999059100 title "Pathogenic Importance of Intestinal Hypermotility in NSAID-Induced Small Intestinal Damage in Rats" @default.
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- W1999059100 doi "https://doi.org/10.1159/000064419" @default.
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