Glucagon-like peptide-2 acutely increases proximal small intestinal blood flow in TPN-fed neonatal piglets

Am J Physiol Regul Integr Comp Physiol. 2006 Feb;290(2):R283-9. doi: 10.1152/ajpregu.00588.2005. Epub 2005 Sep 15.


Glucagon-like peptide-2 (GLP-2) is a gut hormone that is secreted in response to enteral feeding and stimulates small intestinal mucosal growth. We have previously shown that GLP-2 infusion acutely increases portal venous blood flow in TPN-fed piglets. The aim of this study was to localize the vasoactive effect of GLP-2 within the gastrointestinal tissues and other visceral organs in TPN-fed piglets. Tissue blood flow rates were quantified using fluorescent microsphere deposition in anesthetized TPN-fed piglets given intravenous infusion of GLP-2 at either 500 pmol x kg(-1) x h(-1) (low GLP-2, n = 7 pigs) or 2,000 pmol x kg(-1) x h(-1) (high GLP-2, n = 8 pigs) for 2 h. Compared with baseline, the low and the high GLP-2 treatment significantly increased the blood flow rate in the duodenum (+77%) and jejunum (+40% and 80%), respectively, but blood flow to the distal small intestine and colon (-15%) was unchanged or slightly decreased. Baseline mucosal blood flow was five-fold higher than serosal blood flow; however, high GLP-2 treatment increased serosal (+140%) to a larger degree than mucosal blood flow (+73%). The high GLP-2 dose increased pancreatic flow (+34%) but decreased blood flow in the kidneys (-14%) and stomach (-12%), whereas the spleen and brain were unaffected. These findings suggest that the acute GLP-2-mediated stimulation of portal blood flow in TPN-fed piglets occurs principally via increased blood flow through the superior mesenteric artery to the proximal small intestine, a tissue region where the GLP-2R mRNA abundance and trophic GLP-2 effects are greatest.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Brain / blood supply
  • Brain / drug effects
  • Colon / blood supply
  • Colon / drug effects
  • Dose-Response Relationship, Drug
  • Glucagon-Like Peptide 2
  • Glucagon-Like Peptides / blood
  • Glucagon-Like Peptides / pharmacology*
  • Intestine, Small / blood supply*
  • Intestine, Small / drug effects*
  • Kidney / blood supply
  • Kidney / drug effects
  • Pancreas / blood supply
  • Pancreas / drug effects
  • Parenteral Nutrition, Total*
  • Spleen / blood supply
  • Spleen / drug effects
  • Stomach / blood supply
  • Stomach / drug effects
  • Swine / physiology*


  • Glucagon-Like Peptide 2
  • Glucagon-Like Peptides