2010
Evaluation of Cerebral Acetate Transport and Metabolic Rates in the Rat Brain in vivo Using 1H-[13C]-NMR
Patel AB, de Graaf RA, Rothman DL, Behar KL, Mason GF. Evaluation of Cerebral Acetate Transport and Metabolic Rates in the Rat Brain in vivo Using 1H-[13C]-NMR. Cerebrovascular And Brain Metabolism Reviews 2010, 30: 1200-1213. PMID: 20125180, PMCID: PMC2879471, DOI: 10.1038/jcbfm.2010.2.Peer-Reviewed Original Research
2006
Increased Brain Monocarboxylic Acid Transport and Utilization in Type 1 Diabetes
Mason GF, Petersen KF, Lebon V, Rothman DL, Shulman GI. Increased Brain Monocarboxylic Acid Transport and Utilization in Type 1 Diabetes. Diabetes 2006, 55: 929-934. PMID: 16567513, PMCID: PMC2995526, DOI: 10.2337/diabetes.55.04.06.db05-1325.Peer-Reviewed Original ResearchConceptsType 1 diabetesDiabetic subjectsControl subjectsType 1 diabetic subjectsInsulin-induced hypoglycemiaNondiabetic control subjectsMonocarboxylic acid transportBrain utilizationSimilar twofold increaseBrain energeticsHypoglycemiaType 1DiabetesOxidative metabolismNonglucose substratesBrainMetabolic substratesUpregulationPatientsAcid transportTwofold increaseSubjectsMagnetic resonance spectroscopyLactateMetabolism
2001
Decrease in GABA synthesis rate in rat cortex following GABA-transaminase inhibition correlates with the decrease in GAD67 protein
Mason G, Martin D, Martin S, Manor D, Sibson N, Patel A, Rothman D, Behar K. Decrease in GABA synthesis rate in rat cortex following GABA-transaminase inhibition correlates with the decrease in GAD67 protein. Brain Research 2001, 914: 81-91. PMID: 11578600, DOI: 10.1016/s0006-8993(01)02778-0.Peer-Reviewed Original ResearchConceptsTotal GAD activityGAD activityNon-treated control groupGABA-transaminase inhibitionNitrous oxide anesthesiaCortex of controlGlutamate-glutamine cyclingGlutamic acid decarboxylaseGABA synthesis rateGamma-aminobutyric acid (GABA) synthesisVigabatrin treatmentOxide anesthesiaRat cortexGAD67 proteinControl groupBasal conditionsAcid decarboxylaseEx vivoNeuronal compartmentsVigabatrinQuantitative immunoblottingIsoform compositionRatsCortexInhibition
2000
Nonlinear determination of Michaelis-Menten kinetics with model evaluation through estimation of uncertainties
Mason G, Lai J. Nonlinear determination of Michaelis-Menten kinetics with model evaluation through estimation of uncertainties. Metabolic Brain Disease 2000, 15: 133-149. PMID: 11092580, DOI: 10.1007/bf02679980.Peer-Reviewed Original Research
1999
Determination of the rate of the glutamate/glutamine cycle in the human brain by in vivo 13C NMR
Shen J, Petersen K, Behar K, Brown P, Nixon T, Mason G, Petroff O, Shulman G, Shulman R, Rothman D. Determination of the rate of the glutamate/glutamine cycle in the human brain by in vivo 13C NMR. Proceedings Of The National Academy Of Sciences Of The United States Of America 1999, 96: 8235-8240. PMID: 10393978, PMCID: PMC22218, DOI: 10.1073/pnas.96.14.8235.Peer-Reviewed Original ResearchConceptsGlutamate/glutamine cycleGlutamine cycleCerebral cortexMin/Rat cerebral cortexVivo 13C NMR spectraGlucose oxidation ratesHuman brainGlucose oxidationGlutamatergic activityRat modelTricarboxylic acid cycle rateParietal lobeHuman cortexCortexTime courseBrainGlutamine synthesisMajor metabolic fluxCycle rateTricarboxylic acid cycleHigh levelsInfusionRatsAcid cycle
1998
Stoichiometric coupling of brain glucose metabolism and glutamatergic neuronal activity
Sibson N, Dhankhar A, Mason G, Rothman D, Behar K, Shulman R. Stoichiometric coupling of brain glucose metabolism and glutamatergic neuronal activity. Proceedings Of The National Academy Of Sciences Of The United States Of America 1998, 95: 316-321. PMID: 9419373, PMCID: PMC18211, DOI: 10.1073/pnas.95.1.316.Peer-Reviewed Original ResearchConceptsGlutamatergic neuronal activityGlutamate neurotransmitter cyclingNeuronal activityGln synthesisBrain glucose metabolismSynaptic glutamate releaseGlc metabolismGlutamate releaseRat cortexSynaptic activityGlucose metabolismNeuronal functionBrain activation studiesTricarboxylic acid cycleCortexMetabolismAcid cycleActivation studiesAstrocytesNeuronsActivity
1997
In vivo 13C NMR measurements of cerebral glutamine synthesis as evidence for glutamate–glutamine cycling
Sibson N, Dhankhar A, Mason G, Behar K, Rothman D, Shulman R. In vivo 13C NMR measurements of cerebral glutamine synthesis as evidence for glutamate–glutamine cycling. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 2699-2704. PMID: 9122259, PMCID: PMC20152, DOI: 10.1073/pnas.94.6.2699.Peer-Reviewed Original Research
1995
Simultaneous Determination of the Rates of the TCA Cycle, Glucose Utilization, α-Ketoglutarate/Glutamate Exchange, and Glutamine Synthesis in Human Brain by NMR
Mason G, Gruetter R, Rothman D, Behar K, Shulman R, Novotny E. Simultaneous Determination of the Rates of the TCA Cycle, Glucose Utilization, α-Ketoglutarate/Glutamate Exchange, and Glutamine Synthesis in Human Brain by NMR. Cerebrovascular And Brain Metabolism Reviews 1995, 15: 12-25. PMID: 7798329, DOI: 10.1038/jcbfm.1995.2.Peer-Reviewed Original Research
1993
Rat Brain Glucose Concentration and Transport Kinetics Determined with 13C Nuclear Magnetic Resonance Spectroscopy
Mason G, Behar K, Martin M, Shulman R. Rat Brain Glucose Concentration and Transport Kinetics Determined with 13C Nuclear Magnetic Resonance Spectroscopy. Advances In Experimental Medicine And Biology 1993, 331: 29-34. PMID: 8333345, DOI: 10.1007/978-1-4615-2920-0_6.Peer-Reviewed Original Research
1992
NMR Determination of Intracerebral Glucose Concentration and Transport Kinetics in Rat Brain
Mason G, Behar K, Rothman D, Shulman R. NMR Determination of Intracerebral Glucose Concentration and Transport Kinetics in Rat Brain. Cerebrovascular And Brain Metabolism Reviews 1992, 12: 448-455. PMID: 1569138, DOI: 10.1038/jcbfm.1992.62.Peer-Reviewed Original Research