Nutrient-specific feeding and endocrine effects of jejunal infusions in obese animals

Megan J. Dailey, Alexander A. Moghadam, Timothy H. Moran

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Intestinal nutrient infusions result in variable decreases in food intake and body weight based on the nutrient type and the specific intestinal infusion site. We previously found that intrajejunal infusions of a fatty acid and glucose, but not casein hydrolysate, decreases food intake and body weight in lean chow-fed laboratory rats. To test whether obese, high fat-fed animals would show similar decreases in food intake and body weight in response to intrajejunal infusions of the same nutrients, equal kilocalorie loads of these nutrients (11.4 kcal) or vehicle were infused into the jejunum of obese, high fat-fed male Sprague-Dawley rats over 7 h/day for 5 consecutive days. Food intake was continuously monitored, and body weight was measured daily. After the infusion on the final day, rats were killed and plasma was collected. Similar to lean chow-fed rats, intrajejunal infusions of linoleic acid (LA) and glucose (Glu), but not casein hydrolysate (Cas), suppressed food intake with no compensatory increase in food intake after the infusion period. In contrast to lean chow-fed rats, only the LA, and not the Glu or Cas, produced decreases in body weight in the obese high fat-fed rat. There also were no differences in plasma glucagon-like peptide-1 levels in any of the nutrient infusion groups compared with saline infusion. These results suggest that there is a differential response to the same nutrients in lean vs. obese animals.

Original languageEnglish (US)
Pages (from-to)R420-R428
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Issue number6
StatePublished - Mar 15 2014


  • Food intake
  • Glucagon-like peptide-1
  • Intestinal infusion
  • Obese

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)


Dive into the research topics of 'Nutrient-specific feeding and endocrine effects of jejunal infusions in obese animals'. Together they form a unique fingerprint.

Cite this