title: Effect of protein source in diets fed during gestation and lactation on food intake regulation in male offspring of Wistar rats.
abstract: We hypothesized that protein source in the nutritionally adequate AIN-93G diets fed during gestation, lactation, and weaning influences food intake (FI) regulation in male offspring of Wistar rats. Pregnant rats were fed the recommended casein-based (C) or soy protein-based (S) diet during gestation (experiment 1) or during gestation and lactation (experiment 2). Pups (n = 12 per group) weaned to C or S diets were followed for 9 wk (experiment 1) or 14 wk (experiment 2). At termination, body weight was 5.4% and 9.4% higher, respectively, in offspring of dams fed the S diet. Altered FI regulation was shown by failure of devazepide (a CCK-A receptor blocker) to block FI reduction after protein preloads in offspring of S diet-fed dams, whereas it had a strong effect on offspring of C diet-fed dams (P < 0.005). Similarly, naloxone (an opioid receptor blocker) blocked FI reduction more after casein than after soy protein preloads (P < 0.01). In experiment 2, offspring of dams fed the S diet had higher hypothalamic gene expression of agouti related protein at weaning (P < 0.05), and higher FI was found throughout postweaning (P < 0.0001). FI reduction after protein preloads at week 7 and after glucose preloads at week 13 was greater in offspring of C diet-fed dams (P < 0.05). Plasma insulin at weaning and insulin, ghrelin, and glucagon-like peptide-1 at week 15 were higher in offspring of S diet-fed dams (all P < 0.05). In conclusion, nutritionally complete C and S diets consumed during gestation and lactation differ in their effects on body weight and FI regulation in the offspring. Extending the diet from gestation alone to throughout gestation and lactation exaggerated the adverse effects of the S diet. However, the diet consumed postweaning had little effect on the outcome.
authors.affiliation: Dept. of Nutritional Sciences, Faculty of Medicine, University of Toronto, 150 College Street, Toronto, Ontario, Canada.
authors.forename: Alireza
authors.initials: A
authors.lastname: Jahan-Mihan
authors.forename: Chris E
authors.initials: CE
authors.lastname: Smith
authors.forename: G Harvey
authors.initials: GH
authors.lastname: Anderson
mesh_terms: D054369:Agouti-Related Protein / Q000235:genetics; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000831:Animals, Newborn; D001069:Appetite Regulation / Q000187:drug effects; D001522:Behavior, Animal / Q000187:drug effects; D001835:Body Weight; D002364:Caseins / Q000008:administration & dosage* / Q000378:metabolism; D020109:Devazepide / Q000494:pharmacology; D004044:Dietary Proteins / Q000008:administration & dosage* / Q000378:metabolism; D005260:Female; D005865:Gestational Age; D054439:Ghrelin / Q000097:blood; D052216:Glucagon-Like Peptide 1 / Q000097:blood; D006727:Hormone Antagonists / Q000494:pharmacology; D007031:Hypothalamus / Q000187:drug effects / Q000378:metabolism; D007328:Insulin / Q000097:blood; D007774:Lactation; D008297:Male; D039382:Maternal Nutritional Physiological Phenomena; D009270:Naloxone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D051381:Rats; D017208:Rats, Wistar; D043886:Receptor, Cholecystokinin A / Q000037:antagonists & inhibitors / Q000378:metabolism; D030262:Soybean Proteins / Q000008:administration & dosage* / Q000378:metabolism; D013997:Time Factors; D014886:Weaning
chemical_list: D054369:Agouti-Related Protein; D002364:Caseins; D004044:Dietary Proteins; D054439:Ghrelin; D006727:Hormone Antagonists; D007328:Insulin; D009292:Narcotic Antagonists; D043886:Receptor, Cholecystokinin A; D030262:Soybean Proteins; D009270:Naloxone; D052216:Glucagon-Like Peptide 1; D020109:Devazepide