2021
Hunger-promoting AgRP neurons trigger an astrocyte-mediated feed-forward auto-activation loop in mice
Varela L, Stutz B, Song JE, Kim JG, Liu ZW, Gao XB, Horvath TL. Hunger-promoting AgRP neurons trigger an astrocyte-mediated feed-forward auto-activation loop in mice. Journal Of Clinical Investigation 2021, 131 PMID: 33848272, PMCID: PMC8121506, DOI: 10.1172/jci144239.Peer-Reviewed Original ResearchConceptsAgRP neuronsHypothalamic feeding circuitsInhibitory neurotransmitter GABAGhrelin administrationInhibitory toneAstrocytic responseMetabolic milieuProstaglandin E2Neurotransmitter GABANeuronal controlSynaptic plasticityGlial processesNeuronsNeural excitationMitochondrial adaptationsFood deprivationAstrocytesPerikaryaFeeding circuitRegion crucialFeedingObesityGABAExcitabilityChemogenetics
2019
Prefrontal Cortical and Behavioral Adaptations to Surgical Delivery Mediated by Metabolic Principles
Taylor-Giorlando M, Scheinost D, Ment L, Rothman D, Horvath TL. Prefrontal Cortical and Behavioral Adaptations to Surgical Delivery Mediated by Metabolic Principles. Cerebral Cortex 2019, 29: 5061-5071. PMID: 30877804, PMCID: PMC6918927, DOI: 10.1093/cercor/bhz046.Peer-Reviewed Original ResearchConceptsMode of deliverySurgical deliveryLayer 3 pyramidal neuronsAlters mitochondrial dynamicsValues of miceMurine findingsCerebral cortexPyramidal neuronsAdult behaviorHuman neonatesMaze testPrepulse inhibitionSpine synapsesPsychiatric illnessAdult miceNeuronal circuitryAnimal modelsClinical relevanceHuman clinical relevanceUCP-2Prefrontal cortexMitochondrial adaptationsImpaired performanceMitochondrial mechanismsBehavioral phenotypes
2015
Hypothalamic POMC neurons promote cannabinoid-induced feeding
Koch M, Varela L, Kim JG, Kim JD, Hernández-Nuño F, Simonds SE, Castorena CM, Vianna CR, Elmquist JK, Morozov YM, Rakic P, Bechmann I, Cowley MA, Szigeti-Buck K, Dietrich MO, Gao XB, Diano S, Horvath TL. Hypothalamic POMC neurons promote cannabinoid-induced feeding. Nature 2015, 519: 45-50. PMID: 25707796, PMCID: PMC4496586, DOI: 10.1038/nature14260.Peer-Reviewed Original ResearchConceptsPOMC neuronsΒ-endorphinHypothalamic pro-opiomelanocortin (POMC) neuronsOpioid peptide β-endorphinHypothalamic POMC neuronsPromotion of feedingPro-opiomelanocortin (POMC) neuronsCannabinoid receptor 1CB1R activityPOMC activitySated miceHormone releaseHypothalamic administrationFood intakeCentral regulationNeuronal activityParadoxical increaseCB1RReceptor 1POMC cellsNeuronsMitochondrial adaptationsDecreased activityPOMC geneUnsuspected role
2008
Exercise-Induced Synaptogenesis in the Hippocampus Is Dependent on UCP2-Regulated Mitochondrial Adaptation
Dietrich MO, Andrews ZB, Horvath TL. Exercise-Induced Synaptogenesis in the Hippocampus Is Dependent on UCP2-Regulated Mitochondrial Adaptation. Journal Of Neuroscience 2008, 28: 10766-10771. PMID: 18923051, PMCID: PMC3865437, DOI: 10.1523/jneurosci.2744-08.2008.Peer-Reviewed Original ResearchConceptsSynaptic plasticityVoluntary exerciseEssential organellesUCP2 functionProtein-2 mRNA expressionDendritic spine synapsesBioenergetic adaptationMitochondrial metabolismMitochondrial oxygen consumptionMitochondrial numberEnergetic needsMitochondrial adaptationsMitochondrial mechanismsExercise inducesDentate gyrusStratum radiatumSpine synapsesCA1 regionGlial morphologyHippocampal formationNeuronal activityGranule cellsAction potentialsNeuronal morphologyMRNA expression