title: Proximal and distal gut hormone secretion in slow transit constipation.
abstract: BACKGROUND
  It has been suggested that slow transit constipation might be part of a panenteric disorder. Gastrointestinal peptides are involved in regulation of motility.
  
  
  METHODS
  In the present study we have evaluated whether plasma levels of proximal and distal gut hormones in the fasting state, and for 120 min after a solid meal in 29 patients with slow transit constipation are different from those obtained from 29 healthy controls. Plasma levels of the gut hormones cholecystokinin, gastrin, pancreatic polypeptide, motilin, neurotensin and peptide YY were determined using sensitive radioimmunoassays. In the patient group, oro-caecal transit time was determined by means of the hydrogen breath test on a separate test day. The results of transit were related with postprandial hormone secretion.
  
  
  RESULTS
  Fasting plasma levels of cholecystokinin and pancreatic polypeptide were significantly (P < 0.05) increased in constipated patients. Postprandially, secretion of pancreatic polypeptide and cholecystokinin was significantly (P < 0.05) increased in the patients, while secretion of peptide YY was significantly (P < 0.05) reduced. Plasma motilin levels were not different between patients and controls. Altered postprandial hormone secretion was mainly observed in constipated patients with prolonged oro-caecal transit time.
  
  
  CONCLUSIONS
  In patients with slow transit constipation, fasting and postprandial secretion of proximal gut hormones apart from motilin is increased and of distal gut hormones decreased, especially in those with severely delayed intestinal transit.
authors.affiliation: Department of Gastroenterology-Hepatology, Leiden University Medical Centre, The Netherlands.
authors.forename: C
authors.initials: C
authors.lastname: Penning
authors.forename: J B
authors.initials: JB
authors.lastname: Delemarre
authors.forename: W A
authors.initials: WA
authors.lastname: Bemelman
authors.forename: I
authors.initials: I
authors.lastname: Biemond
authors.forename: C B
authors.initials: CB
authors.lastname: Lamers
authors.forename: A A
authors.initials: AA
authors.lastname: Masclee
mesh_terms: D000328:Adult; D000368:Aged; D003248:Constipation / Q000503:physiopathology*; D004064:Digestive System / Q000503:physiopathology*; D005215:Fasting; D005260:Female; D005768:Gastrointestinal Hormones / Q000097:blood / Q000378:metabolism*; D005772:Gastrointestinal Transit; D006801:Humans; D008297:Male; D008875:Middle Aged; D019518:Postprandial Period / Q000502:physiology*
chemical_list: D005768:Gastrointestinal Hormones