2016
Mitochondria controlled by UCP2 determine hypoxia-induced synaptic remodeling in the cortex and hippocampus
Varela L, Schwartz ML, Horvath TL. Mitochondria controlled by UCP2 determine hypoxia-induced synaptic remodeling in the cortex and hippocampus. Neurobiology Of Disease 2016, 90: 68-74. PMID: 26777666, DOI: 10.1016/j.nbd.2016.01.004.Peer-Reviewed Original ResearchConceptsHippocampal neuronsMitochondria-endoplasmic reticulum interactionUCP2-KO miceEarly postnatal exposureLoss of synapsesOxygen tensionHigher brain regionsAdaptive mitochondrial responsesProtein 2 expressionHypothalamic circuitsPostnatal exposureKO miceSynaptic remodelingSystemic metabolismSynaptic inputsBrain cellsMetabolic controlNeuronal mitochondriaBrain regionsAdaptive responseNeuronsHippocampusMitochondrial dynamicsMetabolic challengesCortex
2014
Leptin signaling in astrocytes regulates hypothalamic neuronal circuits and feeding
Kim JG, Suyama S, Koch M, Jin S, Argente-Arizon P, Argente J, Liu ZW, Zimmer MR, Jeong JK, Szigeti-Buck K, Gao Y, Garcia-Caceres C, Yi CX, Salmaso N, Vaccarino FM, Chowen J, Diano S, Dietrich MO, Tschöp MH, Horvath TL. Leptin signaling in astrocytes regulates hypothalamic neuronal circuits and feeding. Nature Neuroscience 2014, 17: 908-910. PMID: 24880214, PMCID: PMC4113214, DOI: 10.1038/nn.3725.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAstrocytesCell CountEatingExcitatory Postsynaptic PotentialsGlial Fibrillary Acidic ProteinHypothalamusImmunohistochemistryIn Situ HybridizationLeptinMaleMelanocortinsMiceMice, KnockoutMicroscopy, ElectronNerve NetNeuronsPrimary Cell CulturePro-OpiomelanocortinPulmonary Gas ExchangeReal-Time Polymerase Chain ReactionRNA, MessengerSignal Transduction
2010
Direct inhibition of hypocretin/orexin neurons in the lateral hypothalamus by nociceptin/orphanin FQ blocks stress-induced analgesia in rats
Gerashchenko D, Horvath TL, Xie X. Direct inhibition of hypocretin/orexin neurons in the lateral hypothalamus by nociceptin/orphanin FQ blocks stress-induced analgesia in rats. Neuropharmacology 2010, 60: 543-549. PMID: 21195099, PMCID: PMC3031765, DOI: 10.1016/j.neuropharm.2010.12.026.Peer-Reviewed Original ResearchMeSH KeywordsAnalgesiaAnalysis of VarianceAnimalsCell CountHypothalamic Area, LateralImmunohistochemistryIntracellular Signaling Peptides and ProteinsMaleMicroinjectionsMicroscopy, ElectronNeuronsNeuropeptidesOpioid PeptidesOrexinsPain MeasurementPain PerceptionProto-Oncogene Proteins c-fosRatsRats, Sprague-DawleyReceptors, OpioidRestraint, PhysicalStatistics, NonparametricStress, PhysiologicalConceptsStress-induced analgesiaHcrt neuronsLateral hypothalamusPerifornical areaNociceptin/orphanin FQ systemHypocretin/orexin neuronsNociceptin/orphanin FQHcrt neuronal activityDirect inhibitionThermal pain thresholdThermal nociceptive testsHypocretin/orexinFos immunohistochemistryOrexin neuronsBilateral microinjectionIntracerebroventricular injectionPain thresholdNociceptive testsOrphanin FQOFQ receptorMouse modelNeuronal activityBrain areasHypothalamusNeurons
2005
A Novel Growth Hormone Secretagogue-1a Receptor Antagonist That Blocks Ghrelin-Induced Growth Hormone Secretion but Induces Increased Body Weight Gain
Halem HA, Taylor JE, Dong JZ, Shen Y, Datta R, Abizaid A, Diano S, Horvath TL, Culler MD. A Novel Growth Hormone Secretagogue-1a Receptor Antagonist That Blocks Ghrelin-Induced Growth Hormone Secretion but Induces Increased Body Weight Gain. Neuroendocrinology 2005, 81: 339-349. PMID: 16210868, DOI: 10.1159/000088796.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsArea Under CurveBehavior, AnimalBinding, CompetitiveBody WeightBrainCell CountCHO CellsCricetinaeCricetulusDose-Response Relationship, DrugDrug InteractionsFeeding BehaviorGhrelinGrowth HormoneHumansImmunohistochemistryIodine IsotopesMaleOncogene Proteins v-fosPeptide HormonesRatsRats, Sprague-DawleyReceptors, G-Protein-CoupledReceptors, GhrelinTime FactorsConceptsDorsal medial hypothalamusGHS-1a receptorGrowth hormone secretionBIM-28163Fos-IRWeight gainGH secretionHormone secretionGrowth hormone secretagogue 1a receptorAntagonist of ghrelinMedial arcuate nucleusAction of ghrelinFos protein immunoreactivityAnti-obesity strategiesBody weight gainGhrelin activationConcomitant administrationGhrelin actionMedial hypothalamusArcuate nucleusReceptor antagonistGhrelin receptorFood intakeProtein immunoreactivityHuman ghrelinAgouti-related peptide–expressing neurons are mandatory for feeding
Gropp E, Shanabrough M, Borok E, Xu AW, Janoschek R, Buch T, Plum L, Balthasar N, Hampel B, Waisman A, Barsh GS, Horvath TL, Brüning JC. Agouti-related peptide–expressing neurons are mandatory for feeding. Nature Neuroscience 2005, 8: 1289-1291. PMID: 16158063, DOI: 10.1038/nn1548.Peer-Reviewed Original ResearchMeSH KeywordsAgouti-Related ProteinAnimalsAnorexiaArcuate Nucleus of HypothalamusBeta-GalactosidaseBody WeightCell CountDiphtheria ToxinEatingFeeding BehaviorGene Expression RegulationIntercellular Signaling Peptides and ProteinsMiceMice, KnockoutNeuronsNeuropeptide YPro-OpiomelanocortinProteinsTime Factors
2004
Sex differences in adult suprachiasmatic nucleus neurons emerging late prenatally in rats
Abizaid A, Mezei G, Sotonyi P, Horvath TL. Sex differences in adult suprachiasmatic nucleus neurons emerging late prenatally in rats. European Journal Of Neuroscience 2004, 19: 2488-2496. PMID: 15128402, DOI: 10.1111/j.0953-816x.2004.03359.x.Peer-Reviewed Original ResearchMeSH KeywordsAgingAnalysis of VarianceAnimalsAnimals, NewbornArginine VasopressinBromodeoxyuridineCalbindin 1CalbindinsCell CountEmbryo, MammalianFemaleGeniculate BodiesGlial Fibrillary Acidic ProteinImmunohistochemistryMaleNeuronsNeuropeptide YPregnancyPrenatal Exposure Delayed EffectsRatsRats, Sprague-DawleyS100 Calcium Binding Protein GSex CharacteristicsSuprachiasmatic NucleusTestosterone PropionateConceptsSuprachiasmatic nucleusGonadal steroidsFemale ratsLate gestationSex differencesPregnant female ratsVasoactive intestinal peptideGestational day 18Postnatal day 60BrdU-labeled cellsCalbindin-D28KSuprachiasmatic nucleus neuronsCircadian rhythmIntestinal peptideNucleus neuronsDouble immunocytochemistryGonadal functionTestosterone propionateBrain sectionsRat fetusesDay 18Day 60Cell groupsRatsSCN cellsLow CA1 Spine Synapse Density is Further Reduced by Castration in Male Non-human Primates
Leranth C, Prange-Kiel J, Frick KM, Horvath TL. Low CA1 Spine Synapse Density is Further Reduced by Castration in Male Non-human Primates. Cerebral Cortex 2004, 14: 503-510. PMID: 15054066, DOI: 10.1093/cercor/bhh012.Peer-Reviewed Original ResearchConceptsSpine synapse densitySynapse densityNon-human primatesSpine synapsesCA1 spine synapse densityPyramidal cell apical dendritesCA1 hippocampal areaCell apical dendritesCA1 stratum radiatumFemale non-human primatesMale non-human primatesMale primatesOrchidectomized animalsApical dendritesCA1 areaDendritic shaftsHippocampal areaStratum radiatumGonadal hormonesControl monkeysMale hippocampusGonadectomized animalsOvariectomized femalesAndrogen hormonesPrimate hippocampusPresynaptic N‐methyl‐D‐aspartate receptor expression is increased by estrogen in an aromatase‐rich area of the songbird hippocampus
Saldanha CJ, Schlinger BA, Micevych PE, Horvath TL. Presynaptic N‐methyl‐D‐aspartate receptor expression is increased by estrogen in an aromatase‐rich area of the songbird hippocampus. The Journal Of Comparative Neurology 2004, 469: 522-534. PMID: 14755533, DOI: 10.1002/cne.11035.Peer-Reviewed Original ResearchConceptsHP neuronsVertebrate hippocampusSongbird hippocampusN-methyl-d-aspartate receptor expressionSubcellular characteristicsInfluence of estrogenFunctional plasticityType glutamate receptorsZebra finch brainPrecise mechanismSomal sizeExcitatory pathwaysReceptor expressionExcitatory neurotransmissionExcitatory synapsesGlutamate receptorsPostsynaptic locusPresynaptic boutonsHippocampusEstrogenKey interfacePlasticityNeuronsAromataseAutoreception
2003
Coenzyme Q Induces Nigral Mitochondrial Uncoupling and Prevents Dopamine Cell Loss in a Primate Model of Parkinson’s Disease
Horvath TL, Diano S, Leranth C, Garcia-Segura LM, Cowley MA, Shanabrough M, Elsworth JD, Sotonyi P, Roth RH, Dietrich EH, Matthews RT, Barnstable CJ, Redmond DE. Coenzyme Q Induces Nigral Mitochondrial Uncoupling and Prevents Dopamine Cell Loss in a Primate Model of Parkinson’s Disease. Endocrinology 2003, 144: 2757-2760. PMID: 12810526, DOI: 10.1210/en.2003-0163.Peer-Reviewed Original ResearchConceptsDopamine cell lossParkinson's diseaseCell lossShort-term oral administrationMitochondrial uncouplingSubstantia nigraDopamine neuronsTetrahydropyridine (MPTP) administrationCoenzyme QPrimate modelOral administrationDiseaseOxidative stressState 4 respirationMitochondrial uncoupling proteinAdministrationUncoupling proteinUncouplingNeuronsNigraTetrahydropyridineEstradiol affects axo-somatic contacts of neuroendocrine cells in the arcuate nucleus of adult rats
Parducz A, Zsarnovszky A, Naftolin F, Horvath TL. Estradiol affects axo-somatic contacts of neuroendocrine cells in the arcuate nucleus of adult rats. Neuroscience 2003, 117: 791-794. PMID: 12654332, DOI: 10.1016/s0306-4522(02)00967-3.Peer-Reviewed Original ResearchConceptsAxo-somatic contactsArcuate nucleusSynaptic plasticityGABAergic axo-somatic synapsesMorphological synaptic plasticityAxo-somatic synapsesEffects of estradiolSynapse quantificationArcuate neuronsTracer FluorogoldGonadal steroidsAnterior pituitaryAdult ratsHypophysiotropic neuronsMedian eminenceNervous systemTransient decreaseSystemic applicationNeuroendocrine cellsDisector methodNeuronsNumerical densityEstradiolFluorogoldCells
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 systemEstrogenDiseaseNeuronsEstrogen effects on tyrosine hydroxylase-immunoreactive cells in the ventral mesencephalon of the female rat: further evidence for the two cell hypothesis of dopamine function
Zsarnovszky A, Scalise T, Horvath T, Naftolin F. Estrogen effects on tyrosine hydroxylase-immunoreactive cells in the ventral mesencephalon of the female rat: further evidence for the two cell hypothesis of dopamine function. Brain Research 2000, 868: 363-366. PMID: 10854590, DOI: 10.1016/s0006-8993(00)02323-4.Peer-Reviewed Original ResearchConceptsSubstantia nigra compactaFemale ratsTyrosine hydroxylaseVentral mesencephalic dopaminergic neuronsTyrosine hydroxylase-immunoreactive cellsMesencephalic dopaminergic neuronsVentral tegmental areaTH-immunoreactive perikaryaDifferential effectsVentral mesencephalonTH immunoreactivityDopaminergic neuronsEstrogen effectsEstradiol benzoateTegmental areaMidbrain neuronsInterfascicular nucleusDopamine functionCell hypothesisRatsCell countingNeuronsPresent studyFurther evidenceOVX