Influence of abomasal infusion of glucose or partially hydrolyzed starch on pancreatic exocrine secretion in beef steers.
Five crossbred steers (348 +/- 12 kg) fitted with a pancreatic pouch draining the main pancreatic duct and duodenal re-entrant and abomasal infusion cannulas were used in a 5 x 5 Latin square design to determine the influence of postruminal carbohydrate source and level on pancreatic exocrine secretion in beef steers. Abomasal infusion treatments (250 mL infused/h) were water (control), 20 g/h glucose, 40 g/h glucose, 20 g/h starch hydrolysate (SH), and 40 g/h SH. Infusion periods were 8 d with 3 to 4 d of rest between periods. Pancreatic juice was collected for 6 h on d 8 of each collection period. Every 30 min a 10% subsample was composited and frozen and the remainder was infused into the duodenum via the reentrant cannula. Abomasal infusion of glucose or SH increased (P < 0.10) total secretion of pancreatic juice and decreased (P < 0.10) secretion of alpha-amylase activity. Abomasal carbohydrate infusion did not influence total secretion of protein, trypsin activity, or chymotrypsin activity. This experiment indicates that increasing postruminal glucose or SH decreases pancreatic alpha-amylase secretion.
Swanson
K C
KC
Animal Sciences Department, University of Kentucky, Lexington 40546-0215, USA.
Richards
C J
CJ
Harmon
D L
DL
D000018:Abomasum / Q000378:metabolism; D000818:Animals; D002404:Catheterization / Q000662:veterinary; D002417:Cattle / Q000378:metabolism* / Q000502:physiology; D005947:Glucose / Q000008:administration & dosage / Q000378:metabolism*; D007262:Infusions, Intravenous / Q000662:veterinary; D008297:Male; D010179:Pancreas / Q000378:metabolism*; D010189:Pancreatic Juice / Q000737:chemistry* / Q000201:enzymology; D011897:Random Allocation; D013213:Starch / Q000008:administration & dosage / Q000378:metabolism*; D000516:alpha-Amylases / Q000378:metabolism*
D013213:Starch; D000516:alpha-Amylases; D005947:Glucose