title: A novel hypothalamic neuroendocrine peptide: URP (urotensin-II-related peptide)?
abstract: Urotensin-II-related peptide (URP) is an eight-amino-acid peptide recently isolated from rat brain and considered as the endogenous ligand for the urotensin-II receptor. Immunohistochemical treatment of mouse brain sections with anti-URP antibodies revealed numerous immunopositive fibres in the median eminence and vascular organ of the lamina terminalis as well as labelled cell bodies, mainly in the preoptic area. In consecutive serial sections, in situ hybridization demonstrated URP-mRNA in neuronal perikarya. Double-immunofluorescence labelling showed a co-localization of URP and GnRH in fibres and cell bodies. These results suggest the existence of URP as a novel hypothalamic neuroendocrine peptide co-localized and possible co-released with GnRH.
authors.affiliation: CNRS UMR 7101, université Pierre-et-Marie-Curie, Paris-6, 7, quai Saint-Bernard, 75252 Paris cedex 05, France. johann.egginger@sny.jussieu.fr
authors.forename: Johann-Günther
authors.initials: JG
authors.lastname: Egginger
authors.forename: André
authors.initials: A
authors.lastname: Calas
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology* / Q000502:physiology; D007987:Gonadotropin-Releasing Hormone / Q000378:metabolism; D007031:Hypothalamus / Q000166:cytology* / Q000502:physiology; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018613:Microscopy, Confocal; D036361:Peptide Hormones / Q000235:genetics / Q000378:metabolism*
chemical_list: D036361:Peptide Hormones; C503205:urotensin II-related peptide, mouse; D007987:Gonadotropin-Releasing Hormone