Document Detail


Local versus peripheral blood administration of cholecystokinin-8 and secretin on pancreatic secretion in calves.
MedLine Citation:
PMID:  8074843     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of local and peripheral administration of cholecystokinin-8 (CCK-8) and secretin on the interdigestive pancreatic secretion were examined in conscious preruminating calves. Six calves were surgically fitted with a pancreatic catheter and duodenal cannula, duodenal electrodes and strain gauges, and cooling devices on the cervical vagi. Local intra-arterial (I.A.) infusions were made into the duodenal branch of the right gastroepiploic artery, and peripheral infusions (I.V.) into the external jugular vein. CCK-8 and secretin were infused I.A. and I.V. for 5 min (0, 10, 30 and 100 pmol (kg body weight)-1) during the asecretory phase of the pancreatic interdigestive cycle. CCK-8 and secretin at 100 pmol kg-1 were administered concomitant with reversible cold vagal blockade. Local infusion of CCK-8 without vagal blockade resulted in a significantly faster and stronger pancreatic response than the respective peripheral infusion, although CCK in peripheral blood plasma was paradoxically only minimally increased after I.A. CCK-8 in comparison with a marked increase after I.V. CCK-8. Vagal blockade noticeably decreased the pancreatic response for I.A. CCK-8, but not for I.V. CCK-8. Secretin produced similar pancreatic responses after I.V. and I.A. administration, but the plasma secretin concentration in peripheral blood was markedly lower after I.A. than after I.V. infusions. Cold vagal blockade uniformly reduced the stimulatory effect of I.A. and I.V. secretin infusion on the exocrine pancreas. In calves, CCK-8 apparently stimulates the exocrine pancreas by two different mechanisms: by a direct effect that is vagally independent as well as by an indirect effect in the duodenum that is vagally dependent. The indirect effect of secretin in the duodenum is less clear, but both direct and indirect effects of secretin depend on vagal integrity.
Authors:
R Zabielski; T Onaga; H Mineo; S G Pierzynowski; S Kato
Related Documents :
16862683 - The thai anesthesia incidents study (thai study) of perioperative death: analysis of ri...
750253 - The place of apomorphine prior to obstetric analgesia.
15349743 - Surgical evacuation of acute subdural hematoma improves cerebral hemodynamics in childr...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Experimental physiology     Volume:  79     ISSN:  0958-0670     ISO Abbreviation:  Exp. Physiol.     Publication Date:  1994 May 
Date Detail:
Created Date:  1994-10-03     Completed Date:  1994-10-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9002940     Medline TA:  Exp Physiol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  301-11     Citation Subset:  IM    
Affiliation:
Department of Animal Physiology, Faculty of Veterinary Medicine, Warsaw Agricultural University, Poland.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn
Cattle
Digestion / physiology
Duodenum / physiology
Injections, Intra-Arterial
Injections, Intravenous
Male
Myoelectric Complex, Migrating / drug effects
Pancreas / drug effects,  secretion*
Secretin / administration & dosage*
Sincalide / administration & dosage*
Chemical
Reg. No./Substance:
1393-25-5/Secretin; 25126-32-3/Sincalide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  The struggle to maintain hydration and osmoregulation in animals experiencing severe dehydration and...
Next Document:  Post-crucial period effects of visual experience and deprivation on the guinea-pig superior collicul...