2015
Estrogen- and Satiety State-Dependent Metabolic Lateralization in the Hypothalamus of Female Rats
Toth I, Kiss DS, Jocsak G, Somogyi V, Toronyi E, Bartha T, Frenyo LV, Horvath TL, Zsarnovszky A. Estrogen- and Satiety State-Dependent Metabolic Lateralization in the Hypothalamus of Female Rats. PLOS ONE 2015, 10: e0137462. PMID: 26339901, PMCID: PMC4560379, DOI: 10.1371/journal.pone.0137462.Peer-Reviewed Original ResearchConceptsAd libitum fed animalsFemale ratsRight-sided dominanceSatiety stateFed animalsOvariectomized female ratsContribution of estrogenMetabolic differencesHours of fastingIntensity of cellsState 3 mitochondrial respirationHypothalamic functionMetabolic asymmetryTissue metabolismHypothalamusEstrogenProportion of animalsHypothalamic asymmetryRatsAd libitumLateralizationHigher centersMitochondrial respiration rateEnergy metabolism
2006
Anorectic estrogen mimics leptin's effect on the rewiring of melanocortin cells and Stat3 signaling in obese animals
Gao Q, Mezei G, Nie Y, Rao Y, Choi CS, Bechmann I, Leranth C, Toran-Allerand D, Priest CA, Roberts JL, Gao XB, Mobbs C, Shulman GI, Diano S, Horvath TL. Anorectic estrogen mimics leptin's effect on the rewiring of melanocortin cells and Stat3 signaling in obese animals. Nature Medicine 2006, 13: 89-94. PMID: 17195839, DOI: 10.1038/nm1525.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnorexiaArcuate Nucleus of HypothalamusBody WeightEstradiolEstrogen Receptor alphaExcitatory Postsynaptic PotentialsFemaleInjections, IntraventricularLeptinMaleMelanocortinsMiceMice, Inbred C57BLMice, KnockoutMice, ObeseMicroscopy, ElectronNeuronsObesityOvariectomyPro-OpiomelanocortinRatsRats, Sprague-DawleySignal TransductionSTAT3 Transcription FactorConceptsArcuate nucleusFood intakeLeptin receptor-deficient miceGonadal steroid estradiolRearrangement of synapsesReceptor-deficient miceBody weight regulationBody weight gainWild-type ratsPOMC neuronsLeptin effectsExcitatory inputsMetabolic hormonesLeptin receptorObese animalsSteroids estradiolWeight regulationBody weightSynaptic plasticityWeight gainRobust increaseInput organizationSTAT3 activationEnergy expenditureAdiposity
2005
Estrogen enhances light‐induced activation of dorsal raphe serotonergic neurons
Abizaid A, Mezei G, Thanarajasingam G, Horvath TL. Estrogen enhances light‐induced activation of dorsal raphe serotonergic neurons. European Journal Of Neuroscience 2005, 21: 1536-1546. PMID: 15845081, DOI: 10.1111/j.1460-9568.2005.03964.x.Peer-Reviewed Original ResearchConceptsOvariectomized ratsRaphe nucleusDorsal raphe serotonergic neuronsEstradiol-treated ovariectomized ratsAbility of estradiolDouble-labeled cellsFos-immunoreactive cellsRaphe serotonergic neuronsMedian raphe nucleusFos-positive nucleiRaphe nuclei regionMidbrain rapheSerotonin immunocytochemistryOvarian functionSerotonergic neuronsEstrogen treatmentFos immunoreactivitySerotonergic systemFood intakeNeuronal responsesDirect projectionsPhotic stimulationEstradiolEstrogenNormal onset
2004
Estradiol enhances light-induced expression of transcription factors in the SCN
Abizaid A, Mezei G, Horvath TL. Estradiol enhances light-induced expression of transcription factors in the SCN. Brain Research 2004, 1010: 35-44. PMID: 15126115, DOI: 10.1016/j.brainres.2004.01.089.Peer-Reviewed Original ResearchAnimalsCalbindinsCholesterolCircadian RhythmCREB-Binding ProteinCyclic AMP Response Element-Binding ProteinDNA-Binding ProteinsEarly Growth Response Protein 1EstradiolEstrous CycleFemaleImmediate-Early ProteinsLightNuclear ProteinsOvariectomyPhotic StimulationProto-Oncogene Proteins c-fosRatsRats, Sprague-DawleyS100 Calcium Binding Protein GSuprachiasmatic NucleusTrans-ActivatorsTranscription FactorsUp-Regulation
2003
Estrogen mediates sex differences in stress-induced prefrontal cortex dysfunction
Shansky RM, Glavis-Bloom C, Lerman D, McRae P, Benson C, Miller K, Cosand L, Horvath TL, Arnsten AF. Estrogen mediates sex differences in stress-induced prefrontal cortex dysfunction. Molecular Psychiatry 2003, 9: 531-538. PMID: 14569273, DOI: 10.1038/sj.mp.4001435.Peer-Reviewed Original ResearchConceptsMajor depressive disorderFemale ratsBenzodiazepine inverse agonistPrefrontal cortex dysfunctionStress-related disordersSex differencesEstrogen replacementPrefrontal cortex functionDepressive disorderOvariectomized femalesPFC dysfunctionLow dosesCortex functionInverse agonistUncontrollable stressAnxiety disordersDisordersNeurobiological basisDysfunctionRatsPresent studyStress systemExposureMemory taskProestrus
2001
Oestrogen‐Induced Changes in the Synaptology of the Monkey (Cercopithecus aethiops) Arcuate Nucleus During Gonadotropin Feedback
Zsarnovszky A, Horvath TL, Garcia‐Segura L, Horvath B, Naftolin F. Oestrogen‐Induced Changes in the Synaptology of the Monkey (Cercopithecus aethiops) Arcuate Nucleus During Gonadotropin Feedback. Journal Of Neuroendocrinology 2001, 13: 22-28. DOI: 10.1111/j.1365-2826.2001.00602.x.Peer-Reviewed Original ResearchConceptsGnRH neuronesGnRH cellsDay 1Day 2Day 8Pg/Gonadotropin secretionArcuate nucleusOestrogen-induced LH surgeAfrican green monkeysGonadotropin feedbackInhibitory innervationEstrogen modulationOVX monkeysLH surgeSerum concentrationsExcitatory inputsInhibitory synapsesExcitatory synapsesInhibitory inputsSynaptic connectionsGnRHNeuronesGreen monkeysSynapsesOestrogen-induced changes in the synaptology of the monkey (Cercopithecus aethiops) arcuate nucleus during gonadotropin feedback.
Zsarnovszky A, Horvath T, Garcia-Segura L, Horvath B, Naftolin F. Oestrogen-induced changes in the synaptology of the monkey (Cercopithecus aethiops) arcuate nucleus during gonadotropin feedback. Journal Of Neuroendocrinology 2001, 13: 22-8. PMID: 11123512, DOI: 10.1046/j.1365-2826.2001.00602.x.Peer-Reviewed Original ResearchConceptsGnRH neuronesGnRH cellsDay 1Day 2Day 8Pg/Gonadotropin secretionOestrogen-induced LH surgeAfrican green monkeysInhibitory innervationEstrogen modulationOVX monkeysLH surgeArcuate nucleusSerum concentrationsExcitatory inputsInhibitory synapsesExcitatory synapsesInhibitory inputsSynaptic connectionsGnRHNeuronesGreen monkeysSynapsesPronounced alterations
2000
Estrogen Is Essential for Maintaining Nigrostriatal Dopamine Neurons in Primates: Implications for Parkinson's Disease and Memory
Leranth C, Roth R, Elsworth J, Naftolin F, Horvath T, Redmond D. Estrogen Is Essential for Maintaining Nigrostriatal Dopamine Neurons in Primates: Implications for Parkinson's Disease and Memory. Journal Of Neuroscience 2000, 20: 8604-8609. PMID: 11102464, PMCID: PMC6773080, DOI: 10.1523/jneurosci.20-23-08604.2000.Peer-Reviewed Original ResearchConceptsNigrostriatal dopamine neuronsDopamine neuronsParkinson's diseaseSubstantia nigraDopamine cellsTyrosine hydroxylase-expressing neuronsTyrosine hydroxylase-immunoreactive cellsNigral dopamine systemsEstrogen replacement therapyNew treatment strategiesUnbiased stereological analysisTypes of neuronsProgression of diseaseEstrogen replacementPostmenopausal womenEstrogen deprivationReplacement therapyTreatment strategiesCompact zoneGonadal hormonesLong-term effectsDopamine systemEstrogenDiseaseNeurons
1997
Gonadal steroids target AMPA glutamate receptor-containing neurons in the rat hypothalamus, septum and amygdala: a morphological and biochemical study.
Diano S, Naftolin F, Horvath T. Gonadal steroids target AMPA glutamate receptor-containing neurons in the rat hypothalamus, septum and amygdala: a morphological and biochemical study. Endocrinology 1997, 138: 778-89. PMID: 9003015, DOI: 10.1210/endo.138.2.4937.Peer-Reviewed Original ResearchConceptsGonadal steroidsHypothalamic regionsExcitatory neurotransmissionAMPA receptorsReceptor-containing neuronsAMPA receptor expressionLevels of GluR1GluR2/3 expressionHormonal milieuHypothalamic areaFemale ratsAndrogen receptorDouble immunocytochemistryEstradiol treatmentHypothalamic functionReceptor expressionGlutamate receptorsEstrogen receptorBed nucleusHormonal treatmentRat hypothalamusHigh incidenceStimulatory influenceWestern blotHypothalamus
1996
Morphological and pharmacological evidence for neuropeptide Y-galanin interaction in the rat hypothalamus
Horvath TL, Naftolin F, Leranth C, Sahu A, Kalra SP. Morphological and pharmacological evidence for neuropeptide Y-galanin interaction in the rat hypothalamus. Endocrinology 1996, 137: 3069-3077. PMID: 8770933, DOI: 10.1210/endo.137.7.8770933.Peer-Reviewed Original ResearchMeSH KeywordsAnalysis of VarianceAnimalsArcuate Nucleus of HypothalamusAxonsCerebral VentriclesColchicineDendritesEstradiolEstrusFemaleGalaninHypothalamusHypothalamus, AnteriorImmunoenzyme TechniquesImmunohistochemistryLuteinizing HormoneMicroscopy, ImmunoelectronNeuronsNeuropeptide YOvariectomyParaventricular Hypothalamic NucleusPreoptic AreaProgesteroneRatsRats, Sprague-DawleySignal TransductionSubstance PSupraoptic NucleusConceptsNeuropeptide YMedial preoptic areaLH releaseGAL neuronsArcuate nucleusIntraventricular injectionParaventricular nucleusPreoptic areaSupraoptic nucleusSynaptic connectionsBasal LH releaseNPY-immunoreactive axonsPituitary hormone secretionPituitary gonadotropin releaseRelease of gonadotropinsMicroscopic examinationHypothalamic peptidergic systemsPeroxidase-antiperoxidase techniqueAvidin-biotin peroxidaseLight microscopic examinationMechanism of actionDiaminobenzidine reactionGAL releaseNPY inputNPY administration
1993
Role of neuropeptide-Y in episodic luteinizing hormone release in ovariectomized rats: an excitatory component and opioid involvement
Xu B, Sahu A, Crowley WR, Leranth C, Horvath T, Kalra SP. Role of neuropeptide-Y in episodic luteinizing hormone release in ovariectomized rats: an excitatory component and opioid involvement. Endocrinology 1993, 133: 747-754. PMID: 8344213, DOI: 10.1210/endo.133.2.8344213.Peer-Reviewed Original ResearchConceptsEpisodic LH secretionPlasma LH levelsLH releaseLH secretionLH pulsesExcitatory componentLH levelsOVX ratsOvariectomized ratsMean plasma LH levelsAlpha-helical CRHBeta-endorphin neuronsInhibitory LH responseSuppression of LHLH pulse frequencyInfusion of naloxoneContinuous intraventricular infusionFrequency of LHRole of neuropeptidesNormal rabbit serumExogenous NPYNPY injectionLH responseIntracerebroventricular administrationIntraventricular administrationNeuropeptide-Y innervation of estrogen-induced progesterone receptor-containing dopamine cells in the monkey hypothalamus: a triple labeling light and electron microscopic study
Horvath TL, Shanabrough M, Naftolin F, Leranth C. Neuropeptide-Y innervation of estrogen-induced progesterone receptor-containing dopamine cells in the monkey hypothalamus: a triple labeling light and electron microscopic study. Endocrinology 1993, 133: 405-414. PMID: 8100520, DOI: 10.1210/endo.133.1.8100520.Peer-Reviewed Original ResearchConceptsTyrosine hydroxylase-immunoreactive neuronsHydroxylase-immunoreactive neuronsProgesterone receptorSynaptic contactsAxon terminalsDopamine cellsTyrosine hydroxylase-immunopositive cellsHypophyseal hormone secretionEffects of NPYDorsomedial hypothalamic nucleusCoronal vibratome sectionsNuclear progesterone receptorPR-containing cellsAfrican green monkeysDiaminobenzidine reactionNPY axonsPeriventricular areaOVX animalsHormone secretionMonkey hypothalamusAnterior hypothalamusHypothalamic nucleiDopamine neuronsPRL releaseEstrogenAromatase immunoreactivity in the rat brain: Gonadectomy-sensitive hypothalamic neurons and an unresponsive “limbic ring” of the lateral septum-bed nucleus-amygdala complex
Jakab RL, Horvath TL, Leranth C, Harada N, Naftolin F. Aromatase immunoreactivity in the rat brain: Gonadectomy-sensitive hypothalamic neurons and an unresponsive “limbic ring” of the lateral septum-bed nucleus-amygdala complex. The Journal Of Steroid Biochemistry And Molecular Biology 1993, 44: 481-498. PMID: 8476763, DOI: 10.1016/0960-0760(93)90253-s.Peer-Reviewed Original ResearchConceptsAromatase-immunoreactive neuronsRat brainAromatase systemStria terminalisLateral septal areaDorsomedial hypothalamic nucleusCentral amygdaloid nucleusMidline thalamic regionAxon-like processesDorsolateral hypothalamic areaNeuron systemConversion of androgensLaterodorsal divisionSubincertal nucleusHuman placental aromataseAromatase immunoreactivityBrain distributionGonadectomized ratsHypothalamic areaHypothalamic neuronsAmygdaloid nucleusLimbic areasHypothalamic nucleiZona incertaSeptal area
1992
Neuropeptide-Y innervation of beta-endorphin-containing cells in the rat mediobasal hypothalamus: a light and electron microscopic double immunostaining analysis
Horvath TL, Naftolin F, Kalra SP, Leranth C. Neuropeptide-Y innervation of beta-endorphin-containing cells in the rat mediobasal hypothalamus: a light and electron microscopic double immunostaining analysis. Endocrinology 1992, 131: 2461-2467. PMID: 1425443, DOI: 10.1210/endo.131.5.1425443.Peer-Reviewed Original ResearchConceptsPituitary LH releaseLH releaseOvariectomized ratsMediobasal hypothalamusSynaptic connectionsNPY-immunoreactive axonsBeta-endorphin systemSynaptic membrane specializationsRat mediobasal hypothalamusDirect synaptic connectionsDiaminobenzidine reactionLHRH neuronsNPY neuronsDual effectHypothalamic NPYLH secretionMedial basalLHRH secretionOvarian steroidsPrecise neural mechanismsFemale ratsAxon terminalsElectron microscopic examinationPeptidergic systemsNeuroendocrine regulation