title: Are the cannabinoids involved in bony fish reproduction?
abstract: Following the discovery of two CB1 genes in the fish Fugu rubripes, investigations on the phylogeny of endocannabinoids have indicated that this system is highly conserved. Our study demonstrated that CB1 receptors are expressed in the CNS and gonads of two teleosts, Carassius auratus and Pelvicachromis pulcher, and they show a high percentage of sequence identity with Fugu rubripes CB(1A) and Danio rerio CB1. By means of immunohistochemistry for CB1, sGnRH, and TH, we found a codistribution of these signaling molecules in the basal telencephalon/preoptic area, which are key centers for gonadotropic regulation. We therefore suggest that endocannabinoids are possibly involved in modulating fish reproduction at both the central and peripheral levels.
authors.affiliation: Dipartimento di Biologia Animale e dell'Uomo, Università degli Studi di Torino, Italy.
authors.forename: Erika
authors.initials: E
authors.lastname: Cottone
authors.forename: Ezio
authors.initials: E
authors.lastname: Campantico
authors.forename: Alda
authors.initials: A
authors.lastname: Guastalla
authors.forename: Stefania
authors.initials: S
authors.lastname: Aramu
authors.forename: Alberta M
authors.initials: AM
authors.lastname: Polzonetti-Magni
authors.forename: Mariafosca
authors.initials: M
authors.lastname: Franzoni
mesh_terms: D000818:Animals; D002186:Cannabinoids / Q000737:chemistry* / Q000378:metabolism; D023681:Cichlids / Q000502:physiology*; D005260:Female; D005399:Fishes; D006054:Goldfish / Q000502:physiology*; D008297:Male; D043884:Receptor, Cannabinoid, CB1 / Q000502:physiology*; D012098:Reproduction / Q000235:genetics / Q000502:physiology*
chemical_list: D002186:Cannabinoids; D043884:Receptor, Cannabinoid, CB1