The pattern of the circadian rhythm of pancreatic secretion in fed pigs

Journal of Animal Science
M J ThaelaB W Karlsson

Abstract

The pattern of the circadian rhythm of pancreatic secretion was studied in four 6- to 7-wk-old intact male pigs that were kept in metabolic cages under 12 h light:12 h dark cycles and fed three times a day at 0800, 1500, and 2200. Three 24-h collections of pancreatic juice and blood were begun at 0800 every 2nd day during 5 d. A biphasic pattern of the exocrine pancreas was detected. Secretions during the first phase (postprandial peak) contained large amounts of protein and enzymes, and secretions appeared immediately after feed ingestion. Secretions during the second phase (between meals) had lesser amounts (P < .001) of protein and enzymes, but were of longer duration (P < .001). The output of protein and trypsin activity were generally correlated (P < .001) with each other, but the correlation of either with the volume outflow were small. However, these variables were correlated (P < .01) with the volume outflow at night during the second phase. Plasma concentrations of insulin and glucose increased after each meal, but the increase was significant (P < .05) only for insulin. Insulin and glucose concentrations were correlated (P < .01) with each other after the meals at 0800 and 1500. The results indicated a biphasic patter...Continue Reading

Citations

Mar 19, 2004·Pancreas·Danuta KruszewskaStefan G Pierzynowski
Jan 20, 2007·Journal of Animal Science·J J G C van den BorneS G Pierzynowski
Jun 24, 2005·Journal of Animal Physiology and Animal Nutrition·V SileikieneS G Pierzynowski
Mar 19, 2004·Pancreas·Scott A HolowachukRandal K Buddington
Oct 13, 2020·Frontiers in Endocrinology·María García-CostelaJosefa León

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