| Literature DB >> 16540188 |
Elin Kristenssson1, Monika Sundqvist, Maria Astin, Marita Kjerling, Hillevi Mattsson, Charlotta Dornonville de la Cour, Rolf Håkanson, Erik Lindström.
Abstract
Ghrelin is produced by the A-like cells of the stomach and mobilized by food deprivation. It was reported recently that acute psychological stress increases ghrelin gene expression in rat oxyntic mucosa. The aim of this study was to examine the effect of such stress on circulating ghrelin levels. To this end, we measured plasma ghrelin in Wistar Kyoto (WKY) rats (a high-anxiety strain) and Sprague-Dawley (SPD) rats (a low-anxiety strain), exposed to water avoidance stress for 60 min. Blood was collected before and after the stress. Acute stress increased the plasma ACTH concentration approximately 5-fold (p<0.01) in both strains of rats, while plasma ghrelin increased by 85% (p<0.01) in the SPD rats and by 40% (p<0.001) in the WKY rats. Ghrelin levels after acute stress were higher (p<0.05) in the SPD rats than in the WKY rats. Sham stress did not affect plasma ghrelin. We conclude that acute psychological stress mobilizes ghrelin and that the SPD rats respond with a higher plasma ghrelin concentration than the WKY rats.Entities:
Mesh：
Substances：
Year: 2006 PMID： 16540188 DOI： 10.1016/j.regpep.2006.02.003
Source DB: PubMed Journal: Regul Pept ISSN： 0167-0115