2025
1727-P: Reduced Aromatic Amino Acid Suppression during Acute Hyperglycemia in Young Adults with Obesity
MATSON B, GUNAWAN F, ROTHMAN D, MASON G, NEWGARD C, HWANG J. 1727-P: Reduced Aromatic Amino Acid Suppression during Acute Hyperglycemia in Young Adults with Obesity. Diabetes 2025, 74 DOI: 10.2337/db25-1727-p.Peer-Reviewed Original ResearchCentral nervous systemAcute hyperglycemiaLean controlsBrain glucose levelsMass spectrometry-based metabolomic profilingMeasured plasma amino acidsInsulin resistanceGlucose levelsBranched chain amino acidsPlasma amino acidsDevelopment of insulin resistanceAromatic amino acid levelsChain amino acidsAcid suppressionResponse to hyperglycemiaMetabolomic profilesImpaired suppressionHyperglycemic clampObesityInsulin sensitivityHyperglycemiaNervous systemAmino acid changesBrain glucoseHealthy adults358-OR: Acute Fatty Acid Elevation Does Not Alter Brain Glucose Uptake in Humans
MATSON B, CHANG W, PALMIOTTO J, ROTHMAN D, BELFORT DE AGUIAR R, MASON G, HWANG J. 358-OR: Acute Fatty Acid Elevation Does Not Alter Brain Glucose Uptake in Humans. Diabetes 2025, 74 DOI: 10.2337/db25-358-or.Peer-Reviewed Original ResearchElevation of non-esterified fatty acidsNon-esterified fatty acid levelsHyperglycemic clampBrain glucose uptakeCirculating non-esterified fatty acidsBrain glucoseAcute elevationIntralipid infusionInsulin resistanceIntravenous infusion of salineAbsence of insulin resistanceNon-esterified fatty acidsInduce peripheral insulin resistanceHealthy adultsInfusion of salinePresence of hyperglycemiaGlucose uptakeMeasures of insulin sensitivityPeripheral insulin resistanceHigh-fat dietGlucose infusion rateIntravenous infusionPlasma glucoseLean individualsMRS scans
2024
12241 Association Between Brain Glucose And Circulating Glucagon Levels In Response To Acute Hyperglycemia
Matson B, Gunawan F, Coppoli A, Jiang L, Rangel E, De Aguiar R, Rothman D, Mason G, Hwang J. 12241 Association Between Brain Glucose And Circulating Glucagon Levels In Response To Acute Hyperglycemia. Journal Of The Endocrine Society 2024, 8: bvae163.674. PMCID: PMC11454728, DOI: 10.1210/jendso/bvae163.674.Peer-Reviewed Original ResearchCentral nervous systemBrain glucose levelsPlasma glucagon levelsHyperglycemic clampType 2 diabetesGlucagon levelsGlucagon secretionGlucose levelsResponse to hyperglycemiaAcute hyperglycemiaOral glucose tolerance testBrain glucose metabolismResponse to central nervous systemPathophysiology of type 2 diabetesResponse to hypoglycemiaBrain glucoseIndices of insulin sensitivityEffect of obesityRegulation of glucagon secretionGlucose tolerance testConsequences of obesityModulating glucagon secretionOvert metabolic abnormalitiesBrain glucose uptakeCirculating glucagon levels
2022
Pathophysiology and management of hypoglycemia in diabetes
Sanchez‐Rangel E, Deajon‐Jackson J, Hwang JJ. Pathophysiology and management of hypoglycemia in diabetes. Annals Of The New York Academy Of Sciences 2022, 1518: 25-46. PMID: 36202764, DOI: 10.1111/nyas.14904.Peer-Reviewed Original ResearchConceptsType 1 diabetes mellitusCounter-regulatory hormonal responsesMechanism of hypoglycemiaDuration of diabetesManageable chronic diseaseOptimal glycemic controlManagement of hypoglycemiaTreatment of hypoglycemiaNew insulin formulationsDiscovery of insulinGlycemic controlDiabetes mellitusTherapeutic optionsBrain glucoseChronic diseasesNovel therapiesDiabetes managementHypoglycemiaPharmacologic targetHormonal responsesInsulin formulationsDiabetesPatientsCurrent literatureDelivery devicesReversibility of brain glucose kinetics in type 2 diabetes mellitus
Sanchez-Rangel E, Gunawan F, Jiang L, Savoye M, Dai F, Coppoli A, Rothman DL, Mason GF, Hwang JJ. Reversibility of brain glucose kinetics in type 2 diabetes mellitus. Diabetologia 2022, 65: 895-905. PMID: 35247067, PMCID: PMC8960594, DOI: 10.1007/s00125-022-05664-y.Peer-Reviewed Original ResearchConceptsType 2 diabetesBrain glucose levelsGlucose levelsHyperglycaemic clampGlycaemic controlBrain glucoseUncontrolled type 2 diabetesType 2 diabetes mellitusConclusions/interpretationThese findingsAims/hypothesisWePlasma glucose levelsLinear mixed-effects regression modelsMixed-effects regression modelsContinuous glucose monitoringMinimal weight changeMagnitude of improvementAge 44.8MethodsEight individualsSD HbA1cDiabetes mellitusCerebral glucoseInterpretationThese findingsWeek interventionRegimen intensificationPost intervention
2018
Glycemic Variability and Brain Glucose Levels in T1DM
Hwang JJ, Jiang L, Sanchez Rangel E, Fan X, Ding Y, Lam W, Leventhal J, Dai F, Rothman DL, Mason GF, Sherwin RS. Glycemic Variability and Brain Glucose Levels in T1DM. Diabetes 2018, 68: db180722. PMID: 30327383, PMCID: PMC6302539, DOI: 10.2337/db18-0722.Peer-Reviewed Original ResearchConceptsBrain glucose levelsGlycemic variabilityGlucose levelsHyperglycemic clampType 1 diabetes mellitusPlasma glucose levelsBrain glucose transportHealthy control participantsDiabetes mellitusBrain glucoseControl ratsContinuous glucose monitorGlucose clampRat modelOccipital lobeMRS scanningT1DMGlucose kineticsControl participantsGlucose transport kineticsGlucose monitorSimilar changesRatsClampGlucose transport
2017
Blunted rise in brain glucose levels during hyperglycemia in adults with obesity and T2DM
Hwang JJ, Jiang L, Hamza M, Rangel E, Dai F, Belfort-DeAguiar R, Parikh L, Koo BB, Rothman DL, Mason G, Sherwin RS. Blunted rise in brain glucose levels during hyperglycemia in adults with obesity and T2DM. JCI Insight 2017, 2: e95913. PMID: 29046482, PMCID: PMC5846903, DOI: 10.1172/jci.insight.95913.Peer-Reviewed Original ResearchConceptsGlucose levelsPlasma free fatty acid levelsSimilar plasma glucose levelsFree fatty acid levelsCerebral glucose metabolismPlasma glucose levelsBrain glucose levelsFatty acid levelsAltered feeding behaviorGlucose incrementHyperglycemic clampBrain glucoseCerebral functionLean participantsOccipital lobeRodent modelsGlucose metabolismObesityT2DMGlucose responseHyperglycemiaNeurocognitive consequencesSimilar findingsAcid levelsIntracerebral glucose
2008
Effect of Acute and Recurrent Hypoglycemia on Changes in Brain Glycogen Concentration
Herzog RI, Chan O, Yu S, Dziura J, McNay EC, Sherwin RS. Effect of Acute and Recurrent Hypoglycemia on Changes in Brain Glycogen Concentration. Endocrinology 2008, 149: 1499-1504. PMID: 18187548, PMCID: PMC2276713, DOI: 10.1210/en.2007-1252.Peer-Reviewed Original ResearchConceptsHypoglycemia-associated autonomic failureRecurrent hypoglycemiaAcute hypoglycemiaAutonomic failureBrain glycogenGlycogen levelsBrain glucoseGlucose levelsRH groupInsulin-induced acute hypoglycemiaSimilar blood glucose levelsIntensive insulin treatmentHyperinsulinemic-hypoglycemic clamp studyBrain glycogen concentrationHypoglycemic clamp studiesBlood glucose levelsBrain glucose levelsCounterregulatory failureDiabetic patientsGlycogen supercompensationRecurrent episodesSingle boutInsulin treatmentClamp studiesAnimal models
1993
Localized 1H NMR measurement of glucose consumption in the human brain during visual stimulation.
Chen W, Novotny E, Zhu X, Rothman D, Shulman R. Localized 1H NMR measurement of glucose consumption in the human brain during visual stimulation. Proceedings Of The National Academy Of Sciences Of The United States Of America 1993, 90: 9896-9900. PMID: 8234332, PMCID: PMC47679, DOI: 10.1073/pnas.90.21.9896.Peer-Reviewed Original ResearchConceptsCerebral metabolic rateGlucose levelsPhotic stimulationBrain glucose concentrationsGlucose metabolic ratePrimary visual cortexAverage maximum changeMetabolic rateVisual cortex regionsBrain glucoseCalcarine fissureVisual cortexGlucose changesLactate concentrationCortex regionsVisual stimulationStimulationGlucose concentrationHuman brainGlucose consumptionGlucose transportIndividual subjectsMinCortexLevelsNon-Invasive Measurements of the Cerebral Steady-State Glucose Concentration and Transport in Humans by 13C Nuclear Magnetic Resonance
Gruetter R, Novotny E, Boulware S, Rothman D, Mason G, Shulman G, Tamborlane W, Shulman R. Non-Invasive Measurements of the Cerebral Steady-State Glucose Concentration and Transport in Humans by 13C Nuclear Magnetic Resonance. Advances In Experimental Medicine And Biology 1993, 331: 35-40. PMID: 8333347, DOI: 10.1007/978-1-4615-2920-0_7.Peer-Reviewed Original Research
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