2018
Effects of myeloid sirtuin 1 deficiency on hypothalamic neurogranin in mice fed a high-fat diet
Kim KE, Jeong EA, Shin HJ, Lee JY, Choi EB, An HS, Park KA, Jin Z, Lee DK, Horvath TL, Roh GS. Effects of myeloid sirtuin 1 deficiency on hypothalamic neurogranin in mice fed a high-fat diet. Biochemical And Biophysical Research Communications 2018, 508: 123-129. PMID: 30471862, DOI: 10.1016/j.bbrc.2018.11.126.Peer-Reviewed Original ResearchConceptsHigh-fat dietHypothalamic inflammationSIRT1 deletionWT miceInsulin resistanceKO miceFood intakeNeurogranin expressionParvalbumin protein levelsSIRT1 knockout miceAnorexigenic proopiomelanocortinArcuate nucleusVentromedial hypothalamusHigher food intakeHFDKnockout miceLow expressionMiceWeight gainInflammationProtein levelsNeurograninHypothalamusIntakeDietMyeloid sirtuin1 deficiency aggravates hippocampal inflammation in mice fed high-fat diets
Kim KE, Jeong EA, Lee JY, Yi CO, Park KA, Jin Z, Lee JE, Horvath TL, Roh GS. Myeloid sirtuin1 deficiency aggravates hippocampal inflammation in mice fed high-fat diets. Biochemical And Biophysical Research Communications 2018, 499: 1025-1031. PMID: 29634925, DOI: 10.1016/j.bbrc.2018.04.044.Peer-Reviewed Original ResearchConceptsSirt1 KO miceHigh-fat dietInsulin resistanceKO miceLipocalin-2Inflammation-induced insulin resistanceObesity-associated insulin resistanceAnti-inflammatory effectsPrecursor protein levelsWild-type miceHippocampal inflammationWT miceMacrophage infiltrationObese miceLCN2 expressionSIRT1 knockoutType miceHFDAdipose tissueMiceProtein levelsNeuroinflammationSIRT1DietDeficiencyAbsence of ANGPTL4 in adipose tissue improves glucose tolerance and attenuates atherogenesis
Aryal B, Singh AK, Zhang X, Varela L, Rotllan N, Goedeke L, Chaube B, Camporez JP, Vatner DF, Horvath TL, Shulman GI, Suárez Y, Fernández-Hernando C. Absence of ANGPTL4 in adipose tissue improves glucose tolerance and attenuates atherogenesis. JCI Insight 2018, 3: e97918. PMID: 29563332, PMCID: PMC5926923, DOI: 10.1172/jci.insight.97918.Peer-Reviewed Original ResearchMeSH KeywordsAdipocytesAdipose TissueAllelesAngiopoietin-Like Protein 4AnimalsAtherosclerosisBody WeightChemokinesCytokinesDiet, High-FatDiet, WesternFatty AcidsGene Expression ProfilingGene Expression RegulationGene Knockout TechniquesGlucoseInsulinIntegrasesIntercellular Signaling Peptides and ProteinsLipid MetabolismLipoprotein LipaseLipoproteinsLiverMaleMiceMice, Inbred C57BLMice, KnockoutMusclesObesityProprotein Convertase 9TriglyceridesConceptsAngiopoietin-like protein 4High-fat dietEctopic lipid depositionLipid depositionGlucose toleranceLipoprotein lipaseShort-term high-fat dietSevere metabolic abnormalitiesProgression of atherosclerosisMajor risk factorTriacylglycerol-rich lipoproteinsFatty acid uptakeAdipose tissue resultsProatherogenic lipoproteinsCardiometabolic diseasesMetabolic abnormalitiesKO miceRisk factorsWhole body lipidMetabolic disordersGlucose metabolismLPL activityAdipose tissueGenetic ablationRapid clearance
2016
Astrocytic Insulin Signaling Couples Brain Glucose Uptake with Nutrient Availability
García-Cáceres C, Quarta C, Varela L, Gao Y, Gruber T, Legutko B, Jastroch M, Johansson P, Ninkovic J, Yi CX, Le Thuc O, Szigeti-Buck K, Cai W, Meyer CW, Pfluger PT, Fernandez AM, Luquet S, Woods SC, Torres-Alemán I, Kahn CR, Götz M, Horvath TL, Tschöp MH. Astrocytic Insulin Signaling Couples Brain Glucose Uptake with Nutrient Availability. Cell 2016, 166: 867-880. PMID: 27518562, PMCID: PMC8961449, DOI: 10.1016/j.cell.2016.07.028.Peer-Reviewed Original ResearchConceptsBlood-brain barrierSystemic glucose metabolismInsulin receptorGlucose metabolismGlucose uptakeGlial fibrillary acidic proteinBrain glucose uptakePostnatal ablationHypothalamic glucose sensingGlutamate-aspartate transporterFibrillary acidic proteinPositron emission tomographyMelanocortin neuronsKO miceGlucose levelsAstrocyte morphologyNormal responseEmission tomographyGlucose-induced activationAcidic proteinAspartate transporterCircuit connectivityInsulinGlucose availabilityMitochondrial functionMitochondria 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
2009
Reduced anticipatory locomotor responses to scheduled meals in ghrelin receptor deficient mice
Blum ID, Patterson Z, Khazall R, Lamont EW, Sleeman MW, Horvath TL, Abizaid A. Reduced anticipatory locomotor responses to scheduled meals in ghrelin receptor deficient mice. Neuroscience 2009, 164: 351-359. PMID: 19666088, PMCID: PMC2996828, DOI: 10.1016/j.neuroscience.2009.08.009.Peer-Reviewed Original ResearchConceptsAnticipatory locomotor activityGHSR KO miceLocomotor activityKO miceGhrelin receptor deficient miceReceptor-deficient miceFeeding scheduleFos expression patternsWild-type littermatesRestricted feeding scheduleGhrelin receptor geneGhrelin injectionOrexigenic hormoneFos immunoreactivityHypothalamic nucleiDeficient miceLocomotor responseGhrelinH dailyMiceReceptor geneMealH patternTargeted mutationsBehavioral measures