The Effect of Feeding on Pancreatic Exocrine Secretion in Sheep

Nato, Seiyu; Usami, M.; Ushijima, Jun-ichi

doi:10.2508/chikusan.55.973

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the latter pattern, the delivery of nutrients into the duodenum can permanently stimulate the exocrine pancreas to a certain level close to maximal stimulation, and therefore the cephalic stimulation via vagal nerves cannot be manifested. The experiment performed on adult sheep (Kato et al 1984) is in accordance with this hypothesis. Indeed, it was found in this study that pancreatic juice was much more stimulated by food ingestion in sheep in which the flow of digesta into the duodenum was prevented for several hours, than in sheep with undisturbed digesta flow.…”

Section: Pancreatic Response To Food Ingestionsupporting

confidence: 77%

Kinetics of pancreatic juice secretion in relation to duodenal migrating myoelectric complex in preruminant and ruminant calves fed twice daily

et al. 1997

View full text Add to dashboard Cite

Daily secretion of pancreatic juice, including postprandial responses to food, was investigated in two groups of calves: preruminant (fed with liquid food) and ruminant (fed with solid food). Male Friesian calves (1 week old and 6 weeks old) were surgically fitted with a pancreatic duct catheter, duodenal cannula and two duodenal electrodes. Continuous 24 h collections of pancreatic juice and myoelectrical recordings were performed with minimal restraint and disturbance of animals. In both groups of calves clear periodic fluctuations in pancreatic juice secretion (volume, protein output and trypsin activity) coinciding with duodenal migrating myoelectric complexes (MMC) were recorded. Secretion of juice per cycle and per day was greater in ruminant calves, but the frequency and amplitude of cycles were lower in this group. There were no differences between day and night-time preprandial pancreatic cycles and duodenal MMC in preruminant calves, whilst in ruminant calves, evening MMC were longer than morning MMC. The pancreatic cephalic phase (increase of volume flow, protein output and trypsin activity during and just after food intake) was significant only in preruminant calves following morning feeding. Postprandial pancreatic cycles did not differ from preprandial cycles, except the pancreatic cycle (juice volume and trypsin activity) in which food was offered in preruminant calves. No gastric or intestinal phase was observed in either group of calves. In conclusion, biological cycles of the gastrointestinal tract are present in both preruminant and ruminant calves, and these cycles evolve along with the change from liquid to solid food.

show abstract

Section: Pancreatic Response To Food Ingestionsupporting

confidence: 77%

Kinetics of pancreatic juice secretion in relation to duodenal migrating myoelectric complex in preruminant and ruminant calves fed twice daily

et al. 1997

View full text Add to dashboard Cite

show abstract

“…Therefore, additional cephalic stimulation during solid feed ingestion could not substantially increase the secretion of juice over the already stimulated preprandial level. This was also observed in adult sheep with blocked flow of the digesta into the duodenum (Kato et al, 1984). Under these conditions, pancreatic secretion was much more stimulated by feed ingestion than it was in sheep with undisturbed digesta flow.…”

Section: Cephalic Stimulation Of Pancreatic Secretionmentioning

confidence: 54%

Development and regulation of pancreatic juice secretion in cattle. State-of-the-art

Zabielski¹,

Pierzynowski²

2001

J. Anim. Feed Sci.

View full text Add to dashboard Cite

The secretion of pancreatic juice was studied in cattle from the first days of life to the start of rumination and in adult cows. Synchronized periodic oscillations of pancreatic secretion in phase with the duodenal migrating motor complex were observed in calves from 2 nd -3 rd day of life. These pancreatic oscillations developed with the maturation of the gastrointestinal tract. In adult cattle, pancreatic secretion was relatively stable and essentially did not respond to feeding. However, manipulation of the diet effectively changed daily exocrine secretion, and it is hypothesized that the insulo-acinar axis may be important in this respect. The importance of the vagal nerves, gastrointestinal regulatory peptides, and duodenal contents in the regulation of pancreatic secretion in young and adult cattle is discussed. Some gastrointestinal regulatory peptides affect the pancreas indirectly from the site of their release, i.e., the proximal duodenum in preruminant calves. Vagal extrinsic innervation appears to play a critical permissive role in the effect of gastrointestinal regulatory peptides on the exocrine pancreas.

show abstract

“…Presently, we are unaware of any data that directly measured the effects of monitor peptide and luminal CCK releasing factor in ruminants. Direct extrapolation of conclusions from nonruminant data might lead one to conclude that these peptides do not exert influence on release of CCK from the ruminant small intestine because ruminants apparently do not experience postprandial increases in pancreatic secretions (Kato et al, 1984;Zabielski et al, 1997). An alternative hypothesis may be that monitor peptide and luminal CCK releasing factor may potentiate significant responses in CCK release from the small intestine in ruminants; particularly, in response to greater amounts of protein flowing to the duodenum.…”

Section: Adaptation Of α-Glycohydrolase Secretions To Dietary Proteinmentioning

confidence: 99%

RUMINANT NUTRITION SYMPOSIUM: Effects of postruminal flows of protein and amino acids on small intestinal starch digestion in beef cattle

Brake

Swanson

2018

Journal of Animal Science

View full text Add to dashboard Cite

Many nutritionists adopt feeding strategies designed to increase ruminal starch fermentation because ruminal capacity for starch degradation often exceeds amounts of starch able to be digested in the small intestine of cattle. However, increases in fermentable energy supply are positively correlated with increased instances of metabolic disorders and reductions in DMI, and energy derived by cattle subsequent to fermentation is less than that derived when glucose is intestinally absorbed. Small intestinal starch digestion (SISD) appears to be limited by α-glycohydrolase secretions and a precise understanding of digestion of carbohydrates in the small intestine remains equivocal. Interestingly, small intestinal α-glycohydrolase secretions are responsive to luminal appearance of milk-specific protein (i.e., casein) in the small intestine of cattle, and SISD is increased by greater postruminal flows of individual AA (i.e., Glu). Greater flows of casein and Glu appear to augment SISD, but by apparently different mechanisms. Greater small intestinal absorption of glucose has been associated with increased omental fat accretion even though SISD can increase NE from starch by more than 42% compared to ruminal starch degradation. Nonetheless, in vitro data suggest that greater glucogenicity of diets can allow for greater intramuscular fat accretion, and if greater small intestinal absorption of glucose does not mitigate hepatic gluconeogenesis then increases in SISD may provide opportunity to increase synthesis of intramuscular fat. If duodenal metabolizable AA flow can be altered to allow for improved SISD in cattle, then diet modification may allow for large improvements in feed efficiency and beef quality. Few data are available on direct effects of increases in SISD in response to greater casein or metabolizable Glu flow. An improved understanding of effects of increased SISD in response to greater postruminal flow of Glu and casein on improvements in NE and fates of luminally assimilated glucose could allow for increased efficiency of energy use from corn and improvements in conversion of corn grain to beef. New knowledge related to effects of greater postruminal flow of Glu and casein on starch utilization by cattle will allow nutritionists to more correctly match dietary nutrients to cattle requirements, thereby allowing large improvements in nutrient utilization and efficiency of gain among cattle fed starch-based diets.

show abstract

The Effect of Feeding on Pancreatic Exocrine Secretion in Sheep

Cited by 4 publications

References 0 publications

Kinetics of pancreatic juice secretion in relation to duodenal migrating myoelectric complex in preruminant and ruminant calves fed twice daily

Kinetics of pancreatic juice secretion in relation to duodenal migrating myoelectric complex in preruminant and ruminant calves fed twice daily

Development and regulation of pancreatic juice secretion in cattle. State-of-the-art

RUMINANT NUTRITION SYMPOSIUM: Effects of postruminal flows of protein and amino acids on small intestinal starch digestion in beef cattle

Contact Info

Product

Resources

About