Variations of plasma immunoreactive motilin, pancreatic polypeptide, gastrin and somatostatin along the duodenal motility cycle in the pig

• Published in: Regulatory peptides Vol. 23; no. 1; pp. 27 - 35
• Main Authors: Cuber, Jean-Claude, Laplace, Jean-Paul, Laredo, Catherine, Levenez, Florence, Chayvialle, Jean-Alain
• Format: Journal Article
• Language: English
• Published: Shannon Elsevier B.V 01.10.1988; Amsterdam Elsevier
• Subjects: Animals; Apud cells. Peptide and protein hormones. Growth factors; Biological and medical sciences; Duodenum - physiology; Electromyography; Fundamental and applied biological sciences. Psychology; Gastrins - blood; Gastrointestinal Motility; Insulin - blood; Migrating myoelectric complex; Motilin; Pancreatic polypeptide; Pancreatic Polypeptide - blood; Pig; Reference Values; Somatostatin; Somatostatin - blood; Swine; Vertebrates: endocrinology; Migrating myoelectric complex; Pancreatic polypeptide; Somatostatin; Motilin; Pig; Pancreatic hormone; Motility; Duodenum; Peptide hormone; Gut; Motiline; Vertebrata; Mammalia; Gastrointestinal hormone; Gastrin; Artiodactyla; Ungulata
• ISSN: 0167-0115; 1873-1686
• DOI: 10.1016/0167-0115(88)90418-1

The peripheral plasma concentrations of immunoreactive motilin, pancreatic polypeptide (PP), somatostatin and gastrin were measured in 7 pigs fasted to 24 h and subsequently fed a standard meal. Plasma motilin peaked during the last part of phase II activity of the migrating myoelectric complex (MMC) sequence (25.2 ± 2.3 pM), the lowest value being recorded during phase I (10.6 ± 1.5 pM) after a 24 h fast. Plasma motilin remained at a low level during the digestive pattern of duodenal activity, no fluctuation occurring when the first postprandial MMC recurred. At variance analysis, gastrin and PP were not released phasically with MMC in the fasting state, while at autocovariance both peptides tended to fluctuate during the MMC sequence with positive and negative peaks at regular intervals along MMC cycles. No variation of plasma somatostatin was observed in the fasting animals. These findings argue against a major role of circulating PP, gastrin and somatostatin-like components in the control of fasted and post absorptive duodenal motility in pigs while the role of motilin remains equivocal.