Linked Life Data

14511072

Source:http://linkedlifedata.com/resource/pubmed/id/14511072

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pubmed-article:14511072pubmed:abstractText1. Inflammatory bowel disease (IBD) is a condition that involves proinflammatory cytokines such as interleukins 1beta and 6 (ILs). In this disease, it has been shown that an abnormal microcirculatory system is implicated. 2. Therefore, the effects of in vivo treatment for three days with interleukins 1beta and 6 were investigated on rat isolated mesenteric vascular bed (MVB). 3. A significant concentration-dependent increase in vascular response to noradrenaline (NA) was found, with a significant difference in Emax between control (93.01 +/- 16.78 mmHg) and treated preparations (137.91 +/- 5.20 mmHg). Endothelin-1(ET-1) induced a significantly greater increase of perfusion pressure in treated rats in comparison with control rats at the highest concentration used (0.1 microm). 4. The concentration-dependent decrease of perfusion pressure induced by acetylcholine (ACh) in MVB precontracted with NA was significantly reduced in specimens from treated rats in comparison with control rats, with a significant difference in Emax between control and treated preparations. 5. Perivascular nerve stimulation (PNS) evoked contractions with no difference between treatments. Similarly, no difference in relaxant effect was found after PNS in specimens precontracted with NA, in the presence of guanethidine. 6. These findings indicate that the precocious inflammation acts only at postsynaptic level, facilitating vascular contraction. These data seem to support the hypothesis that vascular dysfunction caused by overproduction of ILs may contribute, among other immunological factors, to vasculitis in IBD that leads to intestinal ischaemia through vasoconstriction.lld:pubmed
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pubmed-article:14511072pubmed:articleTitleEffects of in vivo treatment with interleukins 1beta and 6 on rat mesenteric vascular bed reactivity.lld:pubmed
pubmed-article:14511072pubmed:affiliationDepartment of Pharmacology and Human Physiology, Medical School, University of Bari, Piazza G. Cesare, 70124 Bari, Italy.lld:pubmed
pubmed-article:14511072pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:14511072pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:14511072pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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