Bovine pancreatic secretion in the first week of life: potential involvement of intestinal CCK receptors.
The aim of this study was to evaluate pancreatic juice secretion of calves in the first postnatal days, and determine a potential involvement of cholecystokinin (CCK) and intestinal CCK receptor in its regulation. Nine neonatal Friesian calves (five controls and four treated intraduodenally with FK480, a CCK-A receptor antagonist) were surgically fitted with a pancreatic duct catheter and a duodenal cannula before the first colostrum feeding. Collections of pancreatic juice and duodenal luminal pressure recordings were started early after recovery from anaesthesia and continued for 6 days. From day 2 or 3 of life, periodic fluctuations in pancreatic secretions were observed in concert with duodenal myoelectric motor complex (MMC) and variations in plasma pancreatic polypeptide (PP) concentrations. Intraduodenal administration of FK480 reduced pancreatic juice secretion while intravenous infusion of CCK had no effect. Immunocytochemistry indicated an association of mucosal CCK-A and -B receptors with neural components of the small intestine. In conclusion, periodic activity of the exocrine pancreas exists in neonatal calves soon after birth and local neural intestinal CCK-A receptors could be partly responsible for the modulation of neonatal calf pancreatic secretion.
Zabielski
Romuald
R
The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Science, 05-110 Jabłonna, Poland.
Morisset
Jean
J
Podgurniak
Paweł
P
Romé
Véronique
V
Biernat
Marzena
M
Bernard
Christine
C
Chayvialle
Jean Alain
JA
Guilloteau
Paul
P
D000818:Animals; D000831:Animals, Newborn / Q000378:metabolism*; D001570:Benzodiazepinones / Q000494:pharmacology; D002417:Cattle; D002766:Cholecystokinin / Q000494:pharmacology; D003126:Colostrum; D007211:Indoles / Q000494:pharmacology; D007413:Intestinal Mucosa / Q000378:metabolism*; D008892:Milk; D010179:Pancreas / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology; D010191:Pancreatic Polypeptide / Q000378:metabolism; D010446:Peptide Fragments / Q000494:pharmacology; D019518:Postprandial Period; D051381:Rats; D043886:Receptor, Cholecystokinin A; D043887:Receptor, Cholecystokinin B; D011949:Receptors, Cholecystokinin / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013997:Time Factors
D001570:Benzodiazepinones; D007211:Indoles; D010446:Peptide Fragments; D043886:Receptor, Cholecystokinin A; D043887:Receptor, Cholecystokinin B; D011949:Receptors, Cholecystokinin; C053399:cholecystokinin 9; C082966:FR 120480; D010191:Pancreatic Polypeptide; D002766:Cholecystokinin