PROGRESSINBRAINRESEARCH VOLUME141 GONADOTROPIN-RELEASINGHORMONE:MOLECULESANDRECEPTORS OthervolumesinPROGRESSINBRAINRESEARCH Volume113: The Polymodal Receptor: A Gateway to Pathological Pain, by T. Kumazawa, L. Kruger and K.Mizumura(Eds.)–1996,ISBN0-444-82473-1. Volume114: The Cerebellum: From Structure to Control, by C.I. de Zeeuw, P. Strata and J. Voogd (Eds.) –1997,ISBN0-444-82313-1. Volume115: Brain Function in Hot Environment, by H.S. Sharma and J. Westman (Eds.) – 1998, ISBN 0-444-82377-8. Volume116: The Glutamate Synapse as a Therapeutical Target: Molecular Organization and Pathology of the Glutamate Synapse, by O.P. Ottersen, I.A. Langmoen and L. Gjerstad (Eds.) – 1998, ISBN 0-444-82754-4. Volume117: NeuronalDegenerationandRegeneration:FromBasicMechanismstoProspectsforTherapy,by F.W. van Leeuwen, A. Salehi, R.J. Giger, A.J.G.D. Holtmaat and J. Verhaagen (Eds.) – 1998, ISBN0-444-82817-6. Volume118: Nitric Oxide in Brain Development, Plasticity and Disease, by R.R. Mize, T.M. Dawson, V.L.DawsonandM.J.Friedlander(Eds.)–1998,ISBN0-444-82885-0. Volume119: AdvancesinBrainVasopressin,byI.J.A.Urban,J.P.H.BurbachandD.DeWied(Eds.) – 1999, ISBN0-444-50080-4. Volume120: Nucleotides and their Receptors in the Nervous System, by P. Illes and H. Zimmermann(Eds.) –1999,ISBN0-444-50082-0. Volume121: DisordersofBrain,BehaviorandCognition:TheNeurocomputationalPerspective,byJ.A.Reggia, E.RuppinandD.Glanzman(Eds.)–1999,ISBN0-444-50175-4. Volume122: TheBiologicalBasisforMindBodyInteractions,byE.A.MayerandC.B.Saper(Eds.) – 1999, ISBN0-444-50049-9. Volume123: Peripheral and Spinal Mechanisms in the Neural Control of Movement, by M.D. Binder (Ed.) –1999,ISBN0-444-50288-2. Volume124: CerebellarModules:Molecules, MorphologyandFunction,byN.M.Gerrits,T.J.H.Ruigrokand C.E.DeZeeuw(Eds.)–2000,ISBN0-444-50108-8. Volume125: Volume Transmission Revisited, by L.F. Agnati, K. Fuxe, C. Nicholson and E. Syková (Eds.) –2000,ISBN0-444-50314-5. Volume126: Cognition,EmotionandAutonomicResponses:TheIntegrativeRoleofthePrefrontalCortexand Limbic Structures, by H.B.M. Uylings, C.G. Van Eden, J.P.C. De Bruin, M.G.P. Feenstra and C.M.A.Pennartz(Eds.)–2000,ISBN0-444-50332-3. Volume127: Neural Transplantation II. Novel Cell Therapies for CNS Disorders, by S.B. Dunnett and A.Björklund(Eds.)–2000,ISBN0-444-50109-6. Volume128: NeuralPlasticityandRegeneration,byF.J.Seil(Ed.)–2000,ISBN0-444-50209-2. Volume129: NervousSystemPlasticityandChronicPain,byJ.Sandkühler,B.BrommandG.F.Gebhart(Eds.) –2000,ISBN0-444-50509-1. Volume130: AdvancesinNeuralPopulationCoding,byM.A.L.Nicolelis(Ed.)–2001,ISBN0-444-50110-X. Volume131: Concepts and Challenges in Retinal Biology, by H. Kolb, H. Ripps, and S. Wu (Eds.), – 2001, ISBN0-444-506772. Volume132: Glial Cell Function, by B. Castellano López and M. Nieto-Sampedro (Eds.) – 2001, ISBN 0-444-50508-3. Volume133: TheMaternal Brain. Neurobiological andneuroendocrine adaptation anddisorders inpregnancy and post partum, by J.A. Russell, A.J. Douglas, R.J. Windle and C.D. Ingram (Eds.) – 2001, ISBN0-444-50548-2. Volume134: Vision: From Neurons to Cognition, by C. Casanova and M. Ptito (Eds.) – 2001, ISBN 0-444- 50586-5. Volume135: DoSeizuresDamagetheBrain,byA.PitkänenandT.Sutula(Eds.)–2002,ISBN0-444-50814-7. Volume136: ChangingViewsofCajal’sNeuron,byE.C.Azmitia,J.DeFelipe,E.G.Jones,P.RakicandC.E. Ribak(Eds.)–2002,ISBN0-444-50815-5. Volume137: SpinalCordTrauma:Regeneration,NeuralRepairandFunctionalRecovery,byL.McKerracher, G.DoucetandS.Rossignol(Eds.)–2002,ISBN0-444-50817-1. Volume138: PlasticityintheAdultBrain:FromGenestoNeurotherapy,byM.A.Hofman,G.J.Boer,A.J.G.D. Holtmaat,E.J.W.VanSomeren,J.VerhaagenandD.F.Swaab(Eds.)–2002,ISBN0-444-50981-X. Volume139: Vasopressin andOxytocin: FromGenestoClinical Applications, byD. Poulain,S. OlietandD. Theodosis(Eds.)–2002,ISBN0-444-50982-8. Volume140: The Brain’s Eye, by J. Hyönä, D.P. Munoz, W. Heide and R. Radach (Eds.) – 2002, ISBN 0-444-51097-4. PROGRESSINBRAINRESEARCH VOLUME141 GONADOTROPIN-RELEASING HORMONE: MOLECULES AND RECEPTORS EDITEDBY ISHWARS.PARHAR DepartmentofPhysiology,NipponMedicalSchool, Tokyo113-8602,Japan ELSEVIER AMSTERDAM–BOSTON–LONDON–NEWYORK–OXFORD–PARIS SANDIEGO–SANFRANCISCO–SINGAPORE–SYDNEY–TOKYO 2002 ELSEVIERSCIENCEB.V. SaraBurgerhartstraat25 P.O.Box211,1000AEAmsterdam,TheNetherlands ©2002ElsevierScienceB.V.Allrightsreserved. ThisworkisprotectedundercopyrightbyElsevierScience,andthefollowingtermsandconditionsapplytoitsuse: Photocopying Singlephotocopiesofsinglechaptersmaybemadeforpersonaluseasallowedbynationalcopyrightlaws.Permissionofthe Publisherandpaymentofafeeisrequiredforallotherphotocopying,includingmultipleorsystematiccopying,copyingfor advertisingorpromotionalpurposes,resale,andallformsofdocumentdelivery.Specialratesareavailableforeducationalinsti- tutionsthatwishtomakephotocopiesfornon-profiteducationalclassroomuse. 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Parhar.--1sted. p.;cm.--(Progressinbrainresearch;v.141) Includesbibliographicalreferencesandindex. ISBN0-444-50979-8(alk.paper)--ISBN0-444-80104-9(series) 1.Luteinizinghormonereleasinghormone.2.Luteinizinghormonereleasing hormone--Receptors.3.Neurochemistry.I.Parhar,IshwarS.,1958-II.Series. [DNLM:1.Gonadotropins--physiology.2.Receptors,Gonadotropin--physiology.WK 900G63782002] QP572.L85G6552002 573.6’374--dc21 2002034691 BritishLibraryCataloguinginPublicationData AcataloguerecordfromtheBritishLibraryhasbeenappliedfor. ISBN: 0-444-50979-8(volume) ISBN: 0-444-80104-9(series) ISSN: 0079-6123 (cid:1)∞ThepaperusedinthispublicationmeetstherequirementsofANSI/NISOZ39.48-1992(PermanenceofPaper). PrintedinTheNetherlands. v List of Contributors Y.Arai,DepartmentofHumanSciences,UniversityofHumanandArts,Iwatsuki,Saitama 339-8539,Japan L. Asarian, Department of Psychology, Columbia University, College of Physicians and Surgeons,NewYork,NY10032,USA M. Blomenröhr, Department of Experimental Zoology, Utrecht University, Padualaan 8, 3584CHUtrecht,TheNetherlands J. Bogerd, Department of Experimental Zoology, Utrecht University, Padualaan 8, 3584 CHUtrecht,TheNetherlands P.-M.Bouloux,CentreforNeuroendocrinology,RoyalFreeandUniversityCollegeMedical School,LondonNW32QG,UK J.P. Chang, Departmentof BiologicalSciences,Universityof Alberta,CW 405 Biological SciencesCentre,Edmonton,ABT6G2E9,Canada G.Childs,DepartmentofAnatomy,UniversityofArkansasforMedicalSciences,4301W. MarkhamStreet,SlotNo.510,LittleRock,AK72205,USA A.D’Aniello,StazioneZoologica,VillaComunale,80100Napoli,Italy W.L.Dees,DepartmentofVeterinaryAnatomyandPublicHealth,TexasA&MUniversity, UniversityDrive,CollegeStation,TX77843,USA M.M.DiFiore,DepartmentofLifeSciences,SUN,ViaVivaldi43,81100Caserta,Italy H.L.Eisthen,DepartmentofZoology,MichiganStateUniversity,EastLansing,MI48824, USA M. Fiorentino, Department of Zoology, University of Naples Federico II, Via Mezzocan- none8,80134Napoli,Italy A.Franchi,CentrodeEstudiosFarmacólogicosyBotánicosCONICET,Serrano669,1414 BuenosAires,Argentina T. Funabashi, Department of Physiology, Yokohama City University School of Medicine, 3-9Fukuura,Kanazawa-ku,Yokohama236-0004,Japan K. Gen, Inland Station, National Research Institute of Aquaculture, Fisheries Research Agency,224-1,Hiruta,Tamaki,Watarai,Mie519-0423,Japan H.Goos,DepartmentofExperimentalZoology,UtrechtUniversity,Padualaan8,3584CH Utrecht,TheNetherlands A.C.Gore,KastorNeurobiologyofAgingLaboratories,Mount SinaiSchoolofMedicine, Box1639,1425MadisonAvenue,NewYork,NY10029,USA H.R. Habibi, Department of Biological Sciences, University of Calgary, 2500 University Drive,N.W.Calgary,ABT2N1N4,Canada J.Han,SchoolofBiologicalSciences,SeoulNationalUniversity,Seoul,151-742,Korea F.Hirahara,DepartmentofGynecologyandObstetrics,YokohamaCityUniversitySchool ofMedicine,3-9Fukuura,Kanazawa-ku,Yokohama,236-0004,Japan vi Y.Hu,CentreforNeuroendocrinology,RoyalFreeandUniversityCollegeMedicalSchool, LondonNW32QG,UK L. Iela, Department of Zoology, University of Naples Federico II, Via Mezzocannone 8, 80134Napoli,Italy L.Jennes,DepartmentofAnatomy andNeurobiology, Universityof Kentucky, Collegeof Medicine,430HealthScienceResearchBuilding,Lexington,KY40536,USA H.Kagawa,NationalResearchInstituteofAquaculture,FisheriesResearchAgency,422-1, Nakatsuhamaura,Nansai,Watarai,Mie516-0913,Japan S.S.Kakar,DepartmentofMedicine,UniversityofLouisville,Louisville,KY40202,USA S. Karanth, Pennington Biomedical Research Center, Louisiana State University, 6400 PerkinsRoad,BatonRouge,LA70808-4124,USA K.L. Keen, Wisconsin National Primate Research Center, 1223 Capital Court, Madison, WI53715-1299,USA M. Khalil, Department of Biochemistry and Molecular Biophysics, Columbia University, CollegeofPhysiciansandSurgeons,NewYork,NY10032,USA H.H. Kim, Department of Obstetricsand Gynecology, University of Chicago, 5839 South MarylandAvenue,MC5053,Chicago,IL60637,USA K.Kim,SchoolofBiologicalSciences,SeoulNationalUniversity,Seoul,151-742,Korea F.Kimura,DepartmentofPhysiology,YokohamaCityUniversitySchoolofMedicine,3-9 Fukuura,Kanazawa-ku,Yokohama236-0004,Japan C. Klausen, Department of Biological Sciences, University of Calgary, 2500 University Drive,N.W.Calgary,ABT2N1N4,Canada N. Kumakura, Department of Aquatic Biosciences,Tokyo Universityof Fisheries,Tokyo, 108-8477,Japan S. Lakhlani, Department of Anatomy and Neurobiology, University of Kentucky, College ofMedicine,430HealthScienceResearchBuilding,Lexington,KY40536,USA M. Lasaga, Centro de Investigaciones en Reproducción, Fac. Medicine, UBA, Buenos Aires,Argentina R. Leurs, Department of Pharmacochemistry, Free University, De Boelelaan 1083, 1081 HVAmsterdam,TheNetherlands W. Lin, Department of Anatomy and Neurobiology, University of Kentucky, College of Medicine,430HealthScienceResearchBuilding,Lexington,KY40536,USA A. Lomniczi, Centro de Estudios Farmacólogicos y Botánicos CONICET, Serrano 669, 1414BuenosAires,Argentina G. MacColl, Centre for Neuroendocrinology, Royal Free and University College Medical School,LondonNW32QG,UK M.T. Malik, Department of Medicine, University of Louisville, Louisville, KY 40202, USA C.A. Mastronardi, Pennington Biomedical Research Center, Louisiana State University, 6400PerkinsRoad,BatonRouge,LA70808-4124,USA S.M. McCann, Pennington Biomedical ResearchCenter, Louisiana State University, 6400 PerkinsRoad,BatonRouge,LA70808-4124,USA B.Miller,DepartmentofAnatomyandNeuroscience,UniversityofTexasMedicalBranch, 301UniversityBoulevard,MRB10104,Galveston,TX77555-1043,USA D.Mitsushima,DepartmentofPhysiology,YokohamaCityUniversitySchoolofMedicine, 3-9Fukuura,Kanazawa-ku,Yokohama236-0004,Japan C. Mohn, Centro de Estudios Farmacólogicos y Botánicos CONICET, Serrano 669, 1414 BuenosAires,Argentina vii A. Mori, Department of Aquatic Biosciences, Tokyo University of Fisheries, Tokyo, 108-8477,Japan S. Murakami, Department of Anatomy, Juntendo University, School of Medicine, Hongo, Tokyo,113-8421,Japan T.J.Nakamura,DepartmentofPhysiology,YokohamaCityUniversitySchoolofMedicine, 3-9Fukuura,Kanazawa-ku,Yokohama236-0004,Japan Y. Oka, MisakiMarine BiologicalStation,Graduate School of Science,The Universityof Tokyo,Kanagawa,238-0225,Japan K.Okuzawa,InlandStation,NationalResearchInstituteofAquaculture,FisheriesResearch Agency,224-1,Hiruta,Tamaki,Watarai,Mie519-0423,Japan I.S.Parhar,DepartmentofPhysiology,NipponMedicalSchool,Tokyo113-8602,Japan D.W. Pfaff, Laboratory of Neurobiology and Behavior, The Rockefeller University, 1230 YorkAvenue,Box275,NewYork,NY10021,USA S. Radovick, Department of Pediatrics, University of Chicago, 5839 South Maryland Avenue,MC5053,Chicago,IL60637,USA R.K.Rastogi,DepartmentofZoology,UniversityofNaplesFedericoII,ViaMezzocannone 8,80134Napoli,Italy V. Rettori,Centro de EstudiosFarmacólogicosyBotánicos CONICET, Serrano669, 1414 BuenosAires,Argentina T.A. Richter,Wisconsin National Primate ResearchCenter, 1223 Capital Court, Madison, WI53715-1299,USA E.F.Rissman,DepartmentofBiochemistryandMolecularGenetics,UniversityofVirginia MedicalSchool,P.O.Box800733,Charlottesville,VA22908,USA Y.Sakuma,DepartmentofPhysiology,NipponMedicalSchool,Sendagi1,Bunkyo,Tokyo 113,Japan M. Schwanzel-Fukuda, Laboratory of Neurobiology and Behavior, The Rockefeller Uni- versity,1230YorkAvenue,Box275,NewYork,NY10021,USA C. Scorticati, Centro de Estudios Farmacólogicos y Botánicos CONICET, Serrano 669, 1414BuenosAires,Argentina T.Seki,DepartmentofAnatomy,JuntendoUniversity,SchoolofMedicine,Hongo,Tokyo, 113-8421,Japan J.Y. Seong, Hormone ResearchCenter,Chonnam NationalUniversity, Kwangju, 500-757, Korea K. Shinohara, Department of Physiology, Yokohama City University School of Medicine, 3-9Fukuura,Kanazawa-ku,Yokohama236-0004,Japan R.Silver,DepartmentofPsychology,BarnardCollege,NewYork,NY10032,USA A.-J. Silverman,DepartmentofAnatomy andCell Biology, Columbia University,College ofPhysiciansandSurgeons,NewYork,NY10032,USA G.H.Son,SchoolofBiologicalSciences,SeoulNationalUniversity,Seoul,151-742,Korea S. Sower, Departmentof Biochemistryand MolecularBiology, Universityof New Hamp- shire,46CollegeRoad,Room310,Durham,NH03824,USA S. Srinivasan, Departments of Psychiatry and Behavioral Sciences, Duke University MedicalCenter,Box3497,028CARLBuilding,Durham,NC27710,USA K.Suyama,DepartmentofPhysiology,YokohamaCityUniversitySchoolofMedicine,3-9 Fukuura,Kanazawa-ku,Yokohama236-0004,Japan J.L.Temple,DepartmentofBiology,UniversityofVirginia,P.O.Box400328,275Gilmer Hall,Charlottesville,VA22903,USA viii E. Terasawa,Wisconsin National Primate Research Center, 1223 Capitol Court, Madison, WI53715-1299,USA T. Uemura, Department of Gynecology and Obstetrics, Fujisawa City Hospital, 2-6-1 Fujisawa,Fujisawa251-0052,Japan P. Vissio, Centro de Estudios Farmacólogicos y Botánicos CONICET, Serrano 669, 1414 BuenosAires,Argentina W.C.Wetsel,DepartmentsofPsychiatryandBehavioralSciences,DukeUniversityMedical Center,Box3497,028CARLBuilding,Durham,NC27710,USA A.F. Wiechmann, Department of Cell Biology, University of Oklahoma Health Sciences Center,940S.L.YoungBoulevard,OklahomaCity,OK73104,USA S.J. Winters, Department of Medicine, University of Louisville, Louisville, KY 40202, USA C.R. Wirsig-Wiechmann, Department of Cell Biology, University of Oklahoma Health SciencesCenter,940S.L.YoungBoulevard,OklahomaCity,OK73104,USA A.Wolfe,DepartmentofPediatrics,UniversityofChicago,5839SouthMarylandAvenue, MC5053,Chicago,IL60637,USA S. Yamaguchi, Department of Animal and Marine Bioresources Science, Faculty of Bioresources and Bioenvironmental Sciences, Kyushu University, Fukuoka, Fukuoka 812-8581,Japan W.H. Yu, Pennington Biomedical Research Center, Louisiana State University, 6400 PerkinsRoad,BatonRouge,LA70808-4124,USA ix Preface Gonadotropin-releasinghormone(GnRH,previouslycalledluteinizing-hormonereleas- ing hormone = LHRH) represents the first step in a cascade of events coordinating the complex physiology of reproduction and reproductive behavior in vertebrates. It was initially assumed that GnRH occurred as a single molecular form, in the septo-preoptic area of the vertebrate brain, and that it served a single function. However, over the last decade, 13 structurally distinct forms of GnRHs have been isolated from different ver- tebrate species. Recent research has also demonstrated the existence of GnRH receptor subtypes,whichhaveevolvedinconjunctionwithdistinctGnRHligands.Themultiplicity of GnRH moleculesand receptors has recentlyexpanded with the discovery of chickenII GnRH in the brain of humans and other mammals. It has become increasingly clear that, all vertebratespecies investigatedto date possess two or three different GnRH genes, and that GnRH has multiple functions in addition to stimulatingthe release of gonadotropins. Non-mammalianvertebratespecieshaveplayedacentralroleinthediscoveryofmolecular diversity of GnRHs. Furthermore, comparative studies using different vertebrate models show remarkable similarity in the distribution pattern of GnRH neurons. The embryonic originofGnRHneuronsfromtheolfactoryplacodeandtheirsubsequentmigrationintothe septo-preoptic area is unique among brain cells,which is evolutionarilyconserved among vertebratespeciesrangingfromfishtohumans. This volume summarizes the evolution and physiology of GnRH molecules and recep- tors,andprovidesinsightastohowsocialbehaviorinfluencescellularandmolecularevents in the brain from a comparative perspective. The chapters in this volume are divided into three major sections: Development and Cell Migration, GnRH Receptors, and Physiology andRegulation.Thereviewpapersaroseprimarilyfrom presentationsmadeattheSecond InternationalSymposiumontheComparativeBiologyofGnRH,heldinPenang,Malaysia, June2–4,2001;asatellitesymposium inconjunctionwiththeXIVInternationalCongress of Comparative Endocrinology, Sorrento, Italy. In addition, leading neuroscientists doing cutting-edge researchin the field of GnRH were invitedas authors to make this volume a valuablereference. I would like to acknowledge the cooperation and support received from the authors. I am indebted to those who helped in organizing the symposium, in particular Dr. Tengku SifzizulTengkuMuhammad,Dr.MalikMumtaz,andMs.DiljitKaurfromUniversitiSains Malaysia. The assistance given by Maureen Twaig and Tom Merriweather at the Elsevier officeismostgratefullyacknowledged. IshwarS.Parhar Tokyo,Japan