title: The role of kisspeptin and RFRP in the circadian control of female reproduction.
abstract: In female mammals, reproduction shows ovarian and daily rhythms ensuring that the timing of the greatest fertility coincides with maximal activity and arousal. The ovarian cycle, which lasts from a few days to a few weeks, depends on the rhythm of follicle maturation and ovarian hormone production, whereas the daily cycle depends on a network of circadian clocks of which the main one is located in the suprachiasmatic nuclei (SCN). In the last ten years, major progress has been made in the understanding of the neuronal mechanisms governing mammalian reproduction with the finding that two hypothalamic Arg-Phe-amide peptides, kisspeptin (Kp) and RFRP, regulate GnRH neurons. In this review we discuss the pivotal role of Kp and RFRP neurons at the interface between the SCN clock signal and GnRH neurons to properly time gonadotropin-induced ovulation. We also report recent findings indicating that these neurons may be part of the multi-oscillatory circadian system that times female fertility. Finally, we will discuss recent investigations indicating a role, and putative therapeutic use, of these neuropeptides in human reproduction.
authors.affiliation: Institut des Neurosciences Cellulaires et Intégratives (CNRS UPR 3212), 5 rue Blaise Pascal, 67084 Strasbourg, France.
authors.forename: Matthew
authors.initials: M
authors.lastname: Beymer
authors.affiliation: Institut des Neurosciences Cellulaires et Intégratives (CNRS UPR 3212), 5 rue Blaise Pascal, 67084 Strasbourg, France.
authors.forename: Jo
authors.initials: J
authors.lastname: Henningsen
authors.affiliation: Institut des Neurosciences Cellulaires et Intégratives (CNRS UPR 3212), 5 rue Blaise Pascal, 67084 Strasbourg, France; Service d'Endocrinologie et Diabète, Hôpital Civil, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.
authors.forename: Thibault
authors.initials: T
authors.lastname: Bahougne
authors.affiliation: Institut des Neurosciences Cellulaires et Intégratives (CNRS UPR 3212), 5 rue Blaise Pascal, 67084 Strasbourg, France. Electronic address: simonneaux@inci-cnrs.unistra.fr.
authors.forename: Valérie
authors.initials: V
authors.lastname: Simonneaux
mesh_terms: D000818:Animals; D057906:Circadian Clocks / Q000502:physiology; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D059648:Kisspeptins / Q000378:metabolism*; D008954:Models, Biological; D009479:Neuropeptides / Q000378:metabolism*; D012098:Reproduction / Q000502:physiology*
chemical_list: D059648:Kisspeptins; D009479:Neuropeptides; C416987:RFamide peptide
keywords: AVP; Circadian; GnIH; Kisspeptin; RFRP; VIP