2024
Hypothalamic hormone deficiency enables physiological anorexia in ground squirrels during hibernation
Mohr S, Dai Pra R, Platt M, Feketa V, Shanabrough M, Varela L, Kristant A, Cao H, Merriman D, Horvath T, Bagriantsev S, Gracheva E. Hypothalamic hormone deficiency enables physiological anorexia in ground squirrels during hibernation. Nature Communications 2024, 15: 5803. PMID: 38987241, PMCID: PMC11236985, DOI: 10.1038/s41467-024-49996-2.Peer-Reviewed Original ResearchConceptsHypothalamic feeding centersHormone deficiencyHypothalamic arcuate nucleus neuronsArcuate nucleus neuronsThyroid hormone deficiencyFeeding centerEffects of ghrelinAnorexigenic effectNucleus neuronsPhysiological anorexiaThyroid hormonesNormal physiological functionsGround squirrelsInterbout arousalAnorexiaThirteen-lined ground squirrelsProlonged periodReduced sensitivityPhysiological functionsDeficiency
2010
Estrogen Promotes Parvalbumin Expression in Arcuate Nucleus POMC Neurons
Sotonyi P, Gao Q, Bechmann I, Horvath TL. Estrogen Promotes Parvalbumin Expression in Arcuate Nucleus POMC Neurons. Reproductive Sciences 2010, 17: 1077-1080. PMID: 20713969, DOI: 10.1177/1933719110379651.Peer-Reviewed Original ResearchConceptsPOMC neuronsArcuate nucleus neuronsLean body massSuppression of feedingSuppress appetiteParvalbumin expressionEstrogen treatmentHypothalamic neuronsArcuate nucleusNeuronal degenerationNucleus neuronsFemale miceCalcium overloadExcitatory activityCalcium-binding proteinsCalcium influxReceptor presenceCalcium entrySustained satietyNeuronsEnergy expenditureEstradiolParvalbuminAppetiteBody mass
2008
UCP2 mediates ghrelin’s action on NPY/AgRP neurons by lowering free radicals
Andrews ZB, Liu ZW, Walllingford N, Erion DM, Borok E, Friedman JM, Tschöp MH, Shanabrough M, Cline G, Shulman GI, Coppola A, Gao XB, Horvath TL, Diano S. UCP2 mediates ghrelin’s action on NPY/AgRP neurons by lowering free radicals. Nature 2008, 454: 846-851. PMID: 18668043, PMCID: PMC4101536, DOI: 10.1038/nature07181.Peer-Reviewed Original ResearchMeSH KeywordsAgouti-Related ProteinAnimalsCarnitine O-PalmitoyltransferaseFatty AcidsFeeding BehaviorGene Expression RegulationGhrelinHypothalamusIon ChannelsMembrane Potential, MitochondrialMiceMitochondriaMitochondrial ProteinsNeuronsNeuropeptide YPhosphorylationReactive Oxygen SpeciesSynapsesUncoupling Protein 2ConceptsNPY/AgRP neuronsAgRP neuronsNeuronal activityCo-express neuropeptide YGut-derived hormone ghrelinAgRP neuronal activityArcuate nucleus neuronsFatty acid oxidation pathwayHypothalamic mitochondrial respirationG protein-coupled receptorsGhrelin actionNeuropeptide YNucleus neuronsHormone ghrelinFood intakeGhrelinFree radicalsSynaptic plasticityNeuronal functionIntracellular mechanismsNeuronsMitochondrial mechanismsProtein 2Mitochondrial proliferationRobust changes
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 cells
2003
Estrogen, synaptic plasticity and hypothalamic reproductive aging
Hung AJ, Stanbury MG, Shanabrough M, Horvath TL, Garcia-Segura LM, Naftolin F. Estrogen, synaptic plasticity and hypothalamic reproductive aging. Experimental Gerontology 2003, 38: 53-59. PMID: 12543261, DOI: 10.1016/s0531-5565(02)00183-3.Peer-Reviewed Original ResearchConceptsConstant estrusReproductive agingEstrogen exposureMale ratsAnti-oxidant vitamin EEarly estrogen exposureArcuate nucleus neuronsHypothalamic arcuate nucleus neuronsConstant vaginal estrusHypothalamic failureEstradiol exposureGonadotrophin surgeOvarian estrogenArcuate nucleusConstant diestrusNucleus neuronsOvarian failureElevated estradiolPerikaryal membraneFemale ratsPerinatal periodTesticular androgensRat brainSex steroidsHormonal factors
1995
Galanin neurons exhibit estrogen receptor immunoreactivity in the female rat mediobasal hypothalamus
Horvath T, Leranth C, Kalra S, Naftolin F. Galanin neurons exhibit estrogen receptor immunoreactivity in the female rat mediobasal hypothalamus. Brain Research 1995, 675: 321-324. PMID: 7540929, DOI: 10.1016/0006-8993(94)01374-q.Peer-Reviewed Original ResearchConceptsPituitary hormone secretionEstrogen receptorHormone secretionMediobasal hypothalamusEstrogen receptor immunoreactivityHypothalamic luteinizing hormoneArcuate nucleus neuronsRat mediobasal hypothalamusPopulations of neuronsGalanin neuronsReceptor immunoreactivityOvarian steroidsEstrogen effectsNucleus neuronsLuteinizing hormoneFemale ratsHormone releaseGalaninHypothalamusNeuronsVibratome sectionsImmunoreactivityReceptorsHormoneSecretion