title: Recombinant human leptin attenuates stress axis activity in common carp (Cyprinus carpio L.).
abstract: Proper functioning of the endocrine stress axis requires communication between the stress axis and other regulatory mechanisms. We here describe an intimate interplay between the stress axis and recombinant human leptin (rhLeptin) in a teleostean fish, the common carp Cyprinus carpio. Restraint stress (by netting up to 96h) increased plasma cortisol but did not affect hepatic leptin expression. Perifusion of pituitary glands or head kidneys with rhLeptin revealed direct effects of rhLeptin on both tissues. RhLeptin suppresses basal and CRF-induced ACTH-secretion in a rapid and concentration-dependent manner. The rhLeptin effect persisted for over an hour after administration had been terminated. RhLeptin decreases basal interrenal cortisol secretion in vitro, and by doing so attenuates ACTH-stimulated cortisol production; rhLeptin does not affect interrenal ACTH-sensitivity. Our findings show that the endocrine stress axis activity and leptin are inseparably linked in a teleostean fish, a notion relevant to further our insights in the evolution of leptin physiology in vertebrates.
authors.affiliation: Department of Animal Physiology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen, The Netherlands. M.Gorissen@science.ru.nl
authors.forename: Marnix
authors.initials: M
authors.lastname: Gorissen
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Bernier
authors.forename: Remy
authors.initials: R
authors.lastname: Manuel
authors.forename: Stefan
authors.initials: S
authors.lastname: de Gelder
authors.forename: Juriaan R
authors.initials: JR
authors.lastname: Metz
authors.forename: Mark O
authors.initials: MO
authors.lastname: Huising
authors.forename: Gert
authors.initials: G
authors.lastname: Flik
mesh_terms: D000818:Animals; D037263:Asialoglycoprotein Receptor / Q000378:metabolism; D002347:Carps / Q000378:metabolism*; D006801:Humans; D007668:Kidney / Q000187:drug effects / Q000378:metabolism; D020738:Leptin / Q000494:pharmacology*; D010902:Pituitary Gland / Q000187:drug effects / Q000378:metabolism; D011994:Recombinant Proteins / Q000494:pharmacology*; D013312:Stress, Physiological
chemical_list: D037263:Asialoglycoprotein Receptor; D020738:Leptin; D011994:Recombinant Proteins