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Sökning: WFRF:(Perry M) > (2000-2004)

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  • Holm, Lena, et al. (författare)
  • NO-flurbiprofen maintains duodenal blood flow, enhances mucus secretion contributing to lower mucosal injury
  • 2002
  • Ingår i: American Journal of Physiology - Gastrointestinal and Liver Physiology. - : American Physiological Society. - 0193-1857 .- 1522-1547. ; 283:5, s. G1090-G1097
  • Tidskriftsartikel (refereegranskat)abstract
    • This study investigates possible mechanisms behind the reduced gastrointestinal ulcerogenicity of nitric oxide (NO)-flurbiprofen compared with flurbiprofen. The duodenal mucosa of Inactin-anaesthetised rats was exteriorized for intravital microscopy. Blood flow was measured with laser-Doppler flowmetry (LDF), mucus thickness with micropipettes, ICAM-1 and P-selectin expression with dual-labeled antibody technique, and mucosal integrity by (51)Cr-EDTA permeability. Exposure of the duodenum to flurbiprofen (1.0 mg/ml) for 90 min significantly reduced LDF to 70 +/- 4%, whereas NO-flurbiprofen (1.3 mg/ml) had no significant effect. Mucus accumulation after 60-min exposure was 75 +/- 23 microm (control), -1 +/- 17 microm (flurbiprofen), and 104 +/- 35 microm (NO-flurbiprofen). Mucosal permeability to (51)Cr-EDTA was unchanged in the control and NO-flurbiprofen groups but increased significantly from 1.0 +/- 0.2 to 3.7 +/- 0.7 microl x min(-1) x g(-1) after 90-min exposure to flurbiprofen. Expression of ICAM-1 was significantly increased after oral flurbiprofen but not by NO-flurbiprofen. Positive effects of NO-flurbiprofen compared with flurbiprofen on mucus formation, blood flow, and adhesion molecule expression likely contribute to the reduced mucosal injury observed with NO-flurbiprofen.
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