| Pharmacological modulation of gut mucosal and large vessel blood flow. | |
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MedLine Citation:
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PMID: 17311602 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Constipation, diminished gut blood flow, ischaemic colitis and drug therapy may be associated. AIM: To study the effect of constipating medication on, and the regulation of, gut blood flow. METHODS: 24 healthy females (mean age 30) received, in a double-blind, three-way crossover study: (i) placebo, (ii) ipratropium 40 microg by inhalation (positive control known to reduce rectal mucosal blood flow) and (iii) oral loperamide 4 mg. Mucosal blood flow was measured at the splenic flexure and rectum using laser Doppler flowmetry. Blood flow in the superior and inferior mesenteric arteries was measured by trans-abdominal Doppler ultrasound. RESULTS: Ipratropium decreased rectal mucosal blood flow by 16% (P=0.009) and splenic flexure mucosal blood flow by 8% (P=0.075). Loperamide caused no change in rectal (P=0.40) or splenic flexure mucosal blood flow (P=0.73). Neither treatment changed superior or inferior mesenteric artery blood flow. Splenic flexure mucosal blood flow showed a positive correlation with rectal mucosal blood flow (r=0.69; P<0.0001). CONCLUSIONS: Vasoactive agents may reduce gut mucosal blood flow in the absence of reduced large vessel flow. Constipating drugs do not necessarily reduce gut blood flow. Rectal mucosal blood flow correlates with splenic flexure mucosal flow, and potentially may be used as a more convenient surrogate for studying splenic flexure blood flow. |
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Authors:
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M A Kamm; C C Jordan; B R Leaker; F B Nicholson; C D R Murray; S Taylor; M Marshall; A Gibbs; E G Carter; A V Emmanuel |
Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Alimentary pharmacology & therapeutics Volume: 25 ISSN: 0269-2813 ISO Abbreviation: Aliment. Pharmacol. Ther. Publication Date: 2007 Mar |
Date Detail:
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Created Date: 2007-02-21 Completed Date: 2007-06-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8707234 Medline TA: Aliment Pharmacol Ther Country: England |
Other Details:
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Languages: eng Pagination: 693-702 Citation Subset: IM |
Affiliation:
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St Mark's Hospital, London, UK. kamm@imperial.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Administration, Inhalation Administration, Oral Adult Colon, Transverse / blood supply* Constipation / drug therapy Cross-Over Studies Double-Blind Method Female Humans Intestinal Mucosa / blood supply Ipratropium / pharmacology* Laser-Doppler Flowmetry Loperamide / pharmacology* Mesenteric Artery, Inferior / drug effects Mesenteric Artery, Superior / drug effects Middle Aged Rectum / blood supply* Regional Blood Flow Splanchnic Circulation / drug effects* |
| Chemical | |
Reg. No./Substance:
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53179-11-6/Loperamide; 60205-81-4/Ipratropium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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