Effects of cisapride on postcibal jejunal motor activity.
In the jejunum of fasting humans, cisapride induces a phase 2-like, highly propagative motor pattern. This study investigated cisapride's effects on the fed pattern of the jejunum. Starting 5 min after a phase 3 of the migrating motor complex, 18 healthy men received 5 or 10 mg cisapride or placebo orally in random double-blind fashion and ingested meals containing 1000 and 4200 kJ, respectively. Jejunal pressures were recorded pneumohydraulically with five catheter orifices 10-30 cm aboard the ligament of Treitz. After the 4200-kJ meal, total number and number of propagated contractions as well as area under the curve increased significantly more than after 1000 kJ. Following the 1000-kJ but not the 4200-kJ meal, 10 mg cisapride increased total number of contractions, number of propagated contractions, mean amplitude, and area under curve significantly more than placebo. Fed-pattern duration increased with the meal's caloric content but was not influenced systematically by cisapride. In conclusion, cisapride stimulates jejunal motor activity and induces a propagative pattern after a 1000-kJ but not after a 4200-kJ meal, suggesting that it can produce no further stimulation when motor activity is near maximally enhanced already.
Stacher
G
G
Department of Psychiatry, University of Vienna, Austria.
Gaupmann
G
G
Steinringer
H
H
Schneider
C
C
Stacher-Janotta
G
G
Steiner-Mittelbach
G
G
Abatzi
T A
TA
D000328:Adult; D020117:Cisapride; D004311:Double-Blind Method; D004435:Eating; D005215:Fasting; D005769:Gastrointestinal Motility / Q000187:drug effects*; D006801:Humans; D007583:Jejunum / Q000187:drug effects; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D010880:Piperidines / Q000494:pharmacology*; D011312:Pressure; D011897:Random Allocation; D012016:Reference Values
D010880:Piperidines; D020117:Cisapride