Document Detail

Influence of sildenafil on gastric sensorimotor function in humans.
MedLine Citation:
PMID:  15475488     Owner:  NLM     Status:  MEDLINE    
After a meal, the proximal stomach relaxes probably through the activation of nitrergic neurons in the gastric wall. Nitric oxide-induced smooth muscle relaxation involves activation of soluble guanylate cyclase, with cGMP production, which is then degradated by phosphodiesterase-5 (PDE-5). The aim of this study was to investigate the effect of sildenafil, a selective PDE-5 inhibitor, on fasting and postprandial proximal gastric volume and on gastric emptying rates in humans. A gastric barostat was used to study gastric compliance and perception to isobaric distension in healthy subjects before and after placebo (n = 13) or sildenafil, 50 mg (n = 15). In 10 healthy subjects, two gastric barostat studies were performed in randomized order to study the effect of placebo or sildenafil on postprandial gastric relaxation. Similarly, solid and liquid gastric emptying rates were studied in 12 healthy subjects. Sildenafil significantly increased fasting intragastric volume (141 +/- 15 vs. 163 +/- 15 ml, P < 0.05) and volumes of first perception. Sildenafil induced a higher and prolonged gastric relaxation either at 30 min (357 +/- 38 vs. 253 +/- 42 ml, P < 0.05) or 60 min (348 +/- 49 vs. 247 +/- 38 ml, P < 0.05) after the meal. Sildenafil did not alter solid half-emptying time but significantly delayed liquid emptying (43 +/- 4 vs. 56 +/- 4 min, P < 0.01). In conclusion, sildenafil significantly increases postprandial gastric volume and slows liquid emptying rate, confirming that meal-induced accommodation in humans involves the activation of a nitrergic pathway. The effect of sildenafil on gastric fundus suggests a therapeutic potential for phosphodiesterase inhibitors in patients with impaired gastric accommodation.
Giovanni Sarnelli; Daniel Sifrim; Jozef Janssens; Jan Tack
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  American journal of physiology. Gastrointestinal and liver physiology     Volume:  287     ISSN:  0193-1857     ISO Abbreviation:  Am. J. Physiol. Gastrointest. Liver Physiol.     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-10-11     Completed Date:  2004-11-24     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  100901227     Medline TA:  Am J Physiol Gastrointest Liver Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  G988-92     Citation Subset:  IM    
Department of Internal Medicine, Division of Gastroenterology, University Hospital Gasthuisberg, University of Leuven, B-3000 Leuven, Belgium.
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MeSH Terms
Balloon Dilatation
Gastric Emptying / drug effects
Gastrointestinal Motility / drug effects*
Phosphodiesterase Inhibitors / pharmacology*
Piperazines / pharmacology*
Postprandial Period
Sensation / drug effects*
Single-Blind Method
Stomach / drug effects*,  physiology*
Reg. No./Substance:
0/Phosphodiesterase Inhibitors; 0/Piperazines; 0/Purines; 0/Sulfones; 139755-83-2/sildenafil

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