Journal
NEUROGASTROENTEROLOGY AND MOTILITY
Volume 18, Issue 10, Pages 919-926Publisher
WILEY
DOI: 10.1111/j.1365-2982.2006.00812.x
Keywords
accommodation; dyspepsia; fundic relaxation; 5-HT1A agonist; proximal stomach; visceral perception
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As fundic dysaccommodation represents one of the pathophysiological mechanisms underlying functional dyspepsia, gastric relaxant agents may serve as a new treatment of this disorder. Previous studies have suggested the involvement of 5HT(1) receptors in the control of gastric tone. Our aim was to study the effect of R137696, a novel 5HT(1A) agonist, on fundus sensorimotor function in healthy volunteers. The effect of single oral doses (1-2 mg) R137696 was evaluated in a double-blind, placebo-controlled manner on fasting fundic volume, visceral perception, distension-evoked symptoms and fundic compliance in 21 healthy male subjects. R137696 increased the proximal stomach volumes in a dose-dependent manner. Distention-evoked symptoms or distention and discomfort threshold were not altered by R137696. A logistic regression model, characterizing the relationships between the volume and the visual analogue scale score for dyspeptic symptoms (nausea, fullness, discomfort, pain and satiety) as a sigmoidal curve, revealed that R137696 had no effect on distension-induced discomfort, fullness, pain and satiety compared to placebo. R137696 relaxes the gastric fundus in fasting conditions but has no effect on distension-evoked dyspeptic symptoms in healthy volunteers.
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