title: Blockade of PrRP attenuates MPTP-induced toxicity in mice.
abstract: Prolactin-releasing peptide (PrRP) was isolated as an endogenous ligand of the orphan G-protein coupled receptor hGR3. PrRP has been shown to be involved in the regulation of food intake, stress responses, prolactin secretion and release, blood pressure, and the opioid system. Here we report that PrRP and its receptor, GPR10, were found in the mouse substantia nigra pars compacta (SNpc), the main location of dopaminergic (DA) neurons of the nigrostriatal system. We generated PrRP knockout (KO) mice, and then treated PrRP KO mice and their wild type (WT) littermates with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), a neuron toxin that selectively damages DA neurons in the SNpc. We found that PrRP KO mice were resistant to MPTP-induced lesions of the nigrostriatal system. These effects were further confirmed by the intracerebroventricular injection of P2L-1C, a monoclonal antibody against PrRP into mice. Taken together, our data established a critical role of PrRP in MPTP intoxication in mice.
authors.affiliation: Department of Regulation Biology, Faculty of Science, Saitama University, 255 Shimo-ohkubo, Sakura-ku, Saitama 338-8570, Japan. bsun@gladstone.ucsf.edu
authors.forename: Binggui
authors.initials: B
authors.lastname: Sun
authors.forename: Akikazu
authors.initials: A
authors.lastname: Mochiduki
authors.forename: Kimie
authors.initials: K
authors.lastname: Nakamura
authors.forename: Kotaro
authors.initials: K
authors.lastname: Yokoyama
authors.forename: Sachika
authors.initials: S
authors.lastname: Adachi
authors.forename: Ken
authors.initials: K
authors.lastname: Fujiwara
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Matsumoto
authors.forename: Kinji
authors.initials: K
authors.lastname: Inoue
mesh_terms: D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine / Q000494:pharmacology; D000818:Animals; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000494:pharmacology; D015153:Blotting, Western; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D004298:Dopamine / Q000378:metabolism; D007028:Hypothalamic Hormones / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D020267:MPTP Poisoning / Q000378:metabolism*; D008297:Male; D051379:Mice; D018345:Mice, Knockout; D009498:Neurotoxins / Q000494:pharmacology; D056690:Prolactin-Releasing Hormone; D043562:Receptors, G-Protein-Coupled / Q000378:metabolism; D013378:Substantia Nigra / Q000187:drug effects / Q000378:metabolism
chemical_list: D000911:Antibodies, Monoclonal; D007028:Hypothalamic Hormones; D009498:Neurotoxins; C534378:Prlh protein, mouse; C487625:Prlhr protein, mouse; D056690:Prolactin-Releasing Hormone; D043562:Receptors, G-Protein-Coupled; D015632:1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine; D004298:Dopamine