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A Novel Method for Study of Gastric Mechanical Functions in Conscious Mice
- Janssen, Pieter (author)
- Nielsen, Maria Astin (author)
- Hirsch, Ika (author)
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- Hultin, Leif (author)
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- (creator_code:org_t)
- 2008-07-10
- 2009
- English.
- In: Digestive Diseases and Sciences. - : Springer Science and Business Media LLC. - 0163-2116 .- 1573-2568. ; 54:2, s. 222-231
- Journal article (peer-reviewed)
Abstract
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- A novel method has been developed for simultaneous study of gastric emptying, antral motility, and gastric muscle tone in conscious mice. Intragastric pressure was measured during infusion of an X-ray-opaque, viscous meal through a chronically implanted gastric fistula (0.25 ml/min). Compared with vehicle treatment, molsi-domine (nitric oxide donor) and atropine (muscarinic receptor antagonist) treatment significantly reduced the area under the intragastric pressure curve (AUC) by 37 +/- 4% and 35 +/- 3%, respectively, (mean +/- S.E.M.) whereas N-G-nitro-L-arginine methyl ester (L-NAME; nitric oxide synthase inhibitor) significantly increased the AUC by 20 +/- 3%. Atropine also significantly reduced the frequency and amplitude of stomach contraction-induced intragastric pressure waves while molsidomine only reduced the frequency. Gastric emptying, as assessed by X-ray imaging, was significantly delayed after L-NAME and atropine treatment. This methodology is the first to enable simultaneous assessment of gastric emptying, antral motility, and gastric tone in conscious mice and confirmed the important role of nitrergic and cholinergic innervation.
Keyword
- Mouse
- Gastric motility
- Gastric emptying
- X-ray
- Gastric muscle tone
- MEDICINE
- MEDICIN
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- ref (subject category)
- art (subject category)
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