2024
1583-P: Measuring Mitochondrial Metabolism In Vivo with [1,2-13C2]-L-Glutamine Mass Isotopomers
SIEBEL S, CARDONE R, MASON G, KIBBEY R. 1583-P: Measuring Mitochondrial Metabolism In Vivo with [1,2-13C2]-L-Glutamine Mass Isotopomers. Diabetes 2024, 73 DOI: 10.2337/db24-1583-p.Peer-Reviewed Original ResearchGlucose Regulation of β-Cell KATP Channels: It Is Time for a New Model!
Merrins M, Kibbey R. Glucose Regulation of β-Cell KATP Channels: It Is Time for a New Model! Diabetes 2024, 73: 856-863. PMID: 38768366, PMCID: PMC11109790, DOI: 10.2337/dbi23-0032.Peer-Reviewed Original ResearchConceptsB-cell metabolismInsulin secretionEfficiency of mitochondrial ATP productionModel of glucose-stimulated insulin secretionGlucose-stimulated insulin secretionMitochondrial ATP productionNADPH productionGenetic evidenceInitial insulin secretionATP productionGlycolytic enzymesOXPHOSPyruvate kinaseATP/ADP ratioHealthy B cellsKATP channel closureB cellsDiabetes pathophysiologyGlycolysisStoichiometric yieldKATP channelsBioenergeticsATP/ADPMembrane depolarizationMetabolism
2022
UCP2-dependent redox sensing in POMC neurons regulates feeding
Yoon N, Jin S, Kim J, Liu Z, Sun Q, Cardone R, Kibbey R, Diano S. UCP2-dependent redox sensing in POMC neurons regulates feeding. Cell Reports 2022, 41: 111894. PMID: 36577374, PMCID: PMC9885759, DOI: 10.1016/j.celrep.2022.111894.Peer-Reviewed Original ResearchConceptsPOMC neuronsGlucose metabolismPOMC neuronal activityAnorexigenic pro-opiomelanocortin (POMC) neuronsPro-opiomelanocortin (POMC) neuronsHigh-fat dietFatty acid metabolismMitochondrial respirationLactate levelsCerebrospinal fluidNeuronal activityGlucose utilizationFed stateNeuronsPyruvate levelsExtracellular pyruvate levelsAcid metabolismMalate-aspartate shuttleMetabolismAddition of lactateMitochondrial pyruvate carrierInhibitionObesityPyruvate carrierSatietyMetabolic cycles and signals for insulin secretion
Merrins MJ, Corkey BE, Kibbey RG, Prentki M. Metabolic cycles and signals for insulin secretion. Cell Metabolism 2022, 34: 947-968. PMID: 35728586, PMCID: PMC9262871, DOI: 10.1016/j.cmet.2022.06.003.Peer-Reviewed Original Research