2010
Bisphenol A interferes with synaptic remodeling
Hajszan T, Leranth C. Bisphenol A interferes with synaptic remodeling. Frontiers In Neuroendocrinology 2010, 31: 519-530. PMID: 20609373, PMCID: PMC2964437, DOI: 10.1016/j.yfrne.2010.06.004.Peer-Reviewed Original Research
2008
Remodeling of Hippocampal Spine Synapses in the Rat Learned Helplessness Model of Depression
Hajszan T, Dow A, Warner-Schmidt JL, Szigeti-Buck K, Sallam NL, Parducz A, Leranth C, Duman RS. Remodeling of Hippocampal Spine Synapses in the Rat Learned Helplessness Model of Depression. Biological Psychiatry 2008, 65: 392-400. PMID: 19006787, PMCID: PMC2663388, DOI: 10.1016/j.biopsych.2008.09.031.Peer-Reviewed Original ResearchConceptsHippocampal spine synapsesSpine synapse lossSpine synapsesInescapable footshockEscape deficitSynapse lossDepressive behaviorHippocampal synaptic changesLoss of synapsesNonstressed control ratsStress-related disordersElectron microscopic stereologyStructural synaptic modificationsDesipramine treatmentSynaptic alterationsMotor cortexControl ratsDentate gyrusHippocampal dysfunctionMale ratsSingle injectionSynaptic changesHelplessness paradigmBehavioral effectsSynaptic modificationBisphenol A prevents the synaptogenic response to estradiol in hippocampus and prefrontal cortex of ovariectomized nonhuman primates
Leranth C, Hajszan T, Szigeti-Buck K, Bober J, MacLusky NJ. Bisphenol A prevents the synaptogenic response to estradiol in hippocampus and prefrontal cortex of ovariectomized nonhuman primates. Proceedings Of The National Academy Of Sciences Of The United States Of America 2008, 105: 14187-14191. PMID: 18768812, PMCID: PMC2544599, DOI: 10.1073/pnas.0806139105.Peer-Reviewed Original ResearchConceptsSpine synapse formationNonhuman primate modelSynapse formationPrimate modelAbility of BPAPrefrontal cortexOvariectomized nonhuman primatesLimbic brain areasHuman BPA exposureRodent animal modelsLow exposure levelsBPA administrationDaily doseMale ratsSpine synapsesBPA exposureAnimal modelsBrain areasSynthetic xenoestrogenCognitive functionNonhuman primatesAdverse effectsExposure levelsPolycarbonate plasticsExposure measurements
2007
Bisphenol A Prevents the Synaptogenic Response to Testosterone in the Brain of Adult Male Rats
Leranth C, Szigeti-Buck K, MacLusky NJ, Hajszan T. Bisphenol A Prevents the Synaptogenic Response to Testosterone in the Brain of Adult Male Rats. Endocrinology 2007, 149: 988-994. PMID: 18048497, PMCID: PMC2275360, DOI: 10.1210/en.2007-1053.Peer-Reviewed Original ResearchConceptsAdult male ratsMedial prefrontal cortexMale ratsSpine synapsesCA1 hippocampal areaAsymmetric spine synapsesSham-operated animalsElectron microscopic stereologyImpairs synaptogenesisSynaptogenic actionsOvariectomized ratsHippocampal areaTestosterone supplementationTestosterone propionateEstrogen receptorExposure measurement dataOil vehicleCompensatory increaseIntact animalsSynthetic xenoestrogenPrefrontal cortexRatsHippocampusCastrated malesPotential mechanismsPrenatal exposure to cocaine is associated with increased number of spine synapses in rat prelimbic cortex
Morrow BA, Hajszan T, Leranth C, Elsworth JD, Roth RH. Prenatal exposure to cocaine is associated with increased number of spine synapses in rat prelimbic cortex. Synapse 2007, 61: 862-865. PMID: 17630673, DOI: 10.1002/syn.20430.Peer-Reviewed Original ResearchConceptsPrenatal exposureFemale ratsSpine synapsesPrelimbic cortexDendritic spinesCognitive deficitsLayers II/IIIPrenatal saline controlsExcitatory synaptic inputsAsymmetric spine synapsesPrenatal cocaine exposureRat prelimbic cortexYoung adult malesPhysical disector methodPyramidal neuronsSaline controlsNeuronal activationCocaine exposureExcitatory synapsesFrontal cortexSynaptic inputsAnimal modelsExcess activationPrefrontal cortexCortexEffects of Androgens and Estradiol on Spine Synapse Formation in the Prefrontal Cortex of Normal and Testicular Feminization Mutant Male Rats
Hajszan T, MacLusky NJ, Johansen JA, Jordan CL, Leranth C. Effects of Androgens and Estradiol on Spine Synapse Formation in the Prefrontal Cortex of Normal and Testicular Feminization Mutant Male Rats. Endocrinology 2007, 148: 1963-1967. PMID: 17317772, PMCID: PMC2128740, DOI: 10.1210/en.2006-1626.Peer-Reviewed Original ResearchConceptsSpine synapse formationMale ratsWild-type animalsPrefrontal cortexTfm ratsSpine synapsesAndrogen receptorSynapse formationEffects of androgensSynaptogenic actionsTfm malesGonadal steroidsSynaptogenic effectsGonadal hormonesSynaptic remodelingTfm animalsFemale monkeysRatsCortexCortical spinesCognitive effectsAndrogensReceptorsSynapsesAdult malesSex steroids and the dentate gyrus
Hajszan T, Milner TA, Leranth C. Sex steroids and the dentate gyrus. Progress In Brain Research 2007, 163: 399-816. PMID: 17765731, PMCID: PMC1964752, DOI: 10.1016/s0079-6123(07)63023-4.Peer-Reviewed Original ResearchConceptsDentate gyrusSex steroidsGonadal hormonesSynaptic remodelingActivational effectsNormal dentate gyrusExpression of estrogenDentate gyrus neurogenesisCholinergic septohippocampal systemNormal cognitive functionSteroid-mediated actionsMore granule cellsCertain mouse strainsGyrus neurogenesisNeuroprotective potentialDentate neuronsAndrogen receptorGonadal originDentate cellsAdult brainHippocampal formationGranule cellsCellular injuryClinical importanceAlzheimer's disease
2006
Androgen Effects on Hippocampal CA1 Spine Synapse Numbers Are Retained in Tfm Male Rats with Defective Androgen Receptors
MacLusky NJ, Hajszan T, Johansen JA, Jordan CL, Leranth C. Androgen Effects on Hippocampal CA1 Spine Synapse Numbers Are Retained in Tfm Male Rats with Defective Androgen Receptors. Endocrinology 2006, 147: 2392-2398. PMID: 16439462, DOI: 10.1210/en.2005-0673.Peer-Reviewed Original ResearchConceptsDefective androgen receptorHippocampal synaptic responsesEstradiol benzoateAndrogen receptorMale ratsSpine synapsesTfm malesSynaptic responsesAndrogen effectsTfm mutationEffects of EBDose of EBHippocampal CA1 synapsesSpine synapse numberSesame oil vehicleDendritic spine synapsesCA1 stratum radiatumAdult male ratsHippocampal spine synapsesVehicle-injected controlsHormone-induced increaseAgonists/antagonistsWild-type animalsWild-type malesCA1 synapses
2005
The Environmental Estrogen Bisphenol A Inhibits Estradiol-Induced Hippocampal Synaptogenesis
MacLusky NJ, Hajszan T, Leranth C. The Environmental Estrogen Bisphenol A Inhibits Estradiol-Induced Hippocampal Synaptogenesis. Environmental Health Perspectives 2005, 113: 675-679. PMID: 15929888, PMCID: PMC1257590, DOI: 10.1289/ehp.7633.Peer-Reviewed Original ResearchConceptsEnvironmental BPA exposureHippocampal synapse formationDendritic spine synapsesEndogenous estrogen productionHuman exposureNormal sex differencesHippocampus-dependent memoryHippocampal synaptogenesisOvariectomized ratsPyramidal neuronsBPA doseCA1 areaEstrogen productionSpine synapsesBPA exposureSignificant inhibitory effectSynaptic remodelingHippocampal functionSynapse formationCognitive functionNormal agingRapid effectsInhibitory effectManufacture of plasticsDental prostheses