Sex-associated differences in the leptin and ghrelin systems related with the induction of hyperphagia under high-fat diet exposure in rats

Hormones and Behavior
T PriegoA Palou

Abstract

Leptin and ghrelin are known to be main hormones involved in the control of food intake, with opposing effects. Here we have explored whether changes in the leptin and ghrelin system are involved in the long-term effects of high-fat (HF) diet feeding in rats and whether sex-associated differences exist. Male and female Wistar rats were fed until the age of 6 months with a normal-fat (NF) or an HF-diet. Food intake and body weight were followed. Gastric and serum levels of leptin and ghrelin, and mRNA levels of leptin (in stomach and adipose tissue), ghrelin (in stomach), and NPY, POMC, and leptin and ghrelin receptors (OB-Rb and GHS-R) (in the hypothalamus) were measured. In both males and females, total caloric intake and body weight were greater under the HF-diet feeding. In females, circulating ghrelin levels and leptin mRNA expression in the stomach were higher under HF-diet. HF-diet feeding also resulted in higher hypothalamic NPY/POMC mRNA levels, more marked in females, and in lower OB-Rb mRNA levels, more marked in males. In addition, in females, serum ghrelin levels correlated positively with hypothalamic NPY mRNA levels, and these with caloric intake. In males, hypothalamic OB-Rb mRNA levels correlated positively with...Continue Reading

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Citations

Jan 7, 2015·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·Toshiya MatsuzakiMinoru Irahara
Feb 18, 2011·Physiology & Behavior·Olga D TaraschenkoStanley D Glick
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Jul 27, 2017·Frontiers in Physiology·Francisco Garcia-CarrizoCatalina Picó
Jun 11, 2019·Journal of Neuroendocrinology·Alejandra Freire-RegatilloJulie A Chowen
Jul 30, 2019·Frontiers in Endocrinology·Lorraine Jaimes-HoyPatricia Joseph-Bravo
Nov 2, 2021·Frontiers in Endocrinology·Rim HassounaVirginie Tolle

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