2000
Contrasting Effects of IRS-1 Versus IRS-2 Gene Disruption on Carbohydrate and Lipid Metabolism in Vivo *
Previs S, Withers D, Ren J, White M, Shulman G. Contrasting Effects of IRS-1 Versus IRS-2 Gene Disruption on Carbohydrate and Lipid Metabolism in Vivo *. Journal Of Biological Chemistry 2000, 275: 38990-38994. PMID: 10995761, DOI: 10.1074/jbc.m006490200.Peer-Reviewed Original ResearchMeSH KeywordsAdipose TissueAnimalsCarbohydrate MetabolismFatty Acids, NonesterifiedFood DeprivationGas Chromatography-Mass SpectrometryGlucoseGlycerolInsulinInsulin Receptor Substrate ProteinsIntracellular Signaling Peptides and ProteinsLipid MetabolismLiverMaleMiceMusclesMutationPhenotypePhosphoproteinsRadioimmunoassayTime FactorsConceptsLipid metabolismInsulin resistanceIRS-2Glucose utilizationPlasma free fatty acid concentrationsWhole-body glucose utilizationGlycerol turnoverFree fatty acid concentrationsMarked insulin resistancePeripheral glucose metabolismPeripheral glucose utilizationHyperinsulinemic-euglycemic clampEndogenous glucose productionIRS-1Effect of insulinHepatic glycogen synthesisWT miceFatty acid concentrationsInsulin receptor substrateGlucose metabolismFasted miceAdipose tissueReduced suppressionGlucose productionMiceEffects of Caffeine on Muscle Glycogen Utilization and the Neuroendocrine Axis during Exercise1
Laurent D, Schneider K, Prusaczyk W, Franklin C, Vogel S, Krssak M, Petersen K, Goforth H, Shulman G. Effects of Caffeine on Muscle Glycogen Utilization and the Neuroendocrine Axis during Exercise1. The Journal Of Clinical Endocrinology & Metabolism 2000, 85: 2170-2175. PMID: 10852448, DOI: 10.1210/jcem.85.6.6655.Peer-Reviewed Original ResearchConceptsMuscle glycogen contentMuscle glycogen utilizationGlycogen contentCaffeine ingestionNeuroendocrine axisGlycogen utilizationGlycogen-sparing effectFree fatty acid concentrationsBeta-endorphin levelsCaffeine-treated groupExercise-induced glycogen depletionMaximal oxygen consumptionEffects of caffeineHigher muscle glycogen contentPlacebo groupExercise enduranceFatty acid concentrationsPlasma concentrationsNeuroendocrine hormonesCortisol releaseProlonged exerciseGlycogen depletionPlasma lactateNormal valuesThigh musclesMechanism of muscle glycogen autoregulation in humans
Laurent D, Hundal R, Dresner A, Price T, Vogel S, Petersen K, Shulman G. Mechanism of muscle glycogen autoregulation in humans. AJP Endocrinology And Metabolism 2000, 278: e663-e668. PMID: 10751200, DOI: 10.1152/ajpendo.2000.278.4.e663.Peer-Reviewed Original ResearchConceptsInsulin-stimulated ratesWhole body glucose oxidation ratesMuscle glycogenGlycogen loadingPlasma free fatty acid concentrationsWhole-body glucose uptakeFree fatty acid concentrationsMuscle glycogen contentGlucose oxidation ratesMuscle glycogen synthesisPlasma lactate concentrationTwofold increaseHyperinsulinemic clampGlycogen synthase activityFatty acid concentrationsLoading protocolGlucose infusionHealthy volunteersLactate concentrationGlycogen contentGlucose uptakeAnaerobic glycolysisGlycogen synthesisUnlabeled glucose infusionGlycogen
1999
Intramyocellular lipid concentrations are correlated with insulin sensitivity in humans: a 1H NMR spectroscopy study
Krssak M, Falk Petersen K, Dresner A, DiPietro L, Vogel SM, Rothman DL, Shulman G, Roden M. Intramyocellular lipid concentrations are correlated with insulin sensitivity in humans: a 1H NMR spectroscopy study. Diabetologia 1999, 42: 113-116. PMID: 10027589, DOI: 10.1007/s001250051123.Peer-Reviewed Original ResearchConceptsIntramyocellular lipid concentrationsIntramyocellular lipid contentInsulin sensitivityLipid concentrationsPlasma non-esterified fatty acid concentrationsNon-esterified fatty acid concentrationsWhole-body insulin sensitivityNon-diabetic adultsNon-esterified fatty acidsBody insulin sensitivityNon-obese humansMuscle biopsy studiesCross-sectional analysisInsulin resistanceIntramuscular lipid contentBiopsy studiesClamp testFatty acid concentrationsLipid contentPlasma concentrationsSoleus muscleLinear regression analysisPmol/Inverse correlationM values
1998
Effect of insulin on glycerol production in obese adolescents
Robinson C, Tamborlane W, Maggs D, Enoksson S, Sherwin R, Silver D, Shulman G, Caprio S. Effect of insulin on glycerol production in obese adolescents. American Journal Of Physiology 1998, 274: e737-e743. PMID: 9575836, DOI: 10.1152/ajpendo.1998.274.4.e737.Peer-Reviewed Original ResearchConceptsNet lipid oxidationObese adolescentsLean adultsGlycerol turnoverTwo-step euglycemic-hyperinsulinemic clampFree fatty acid concentrationsBody fat massEuglycemic hyperinsulinemic clampSensitivity of adipocytesEffect of insulinAction of insulinObese groupLean subjectsInsulin resistanceAdipose massPlasma insulinFatty acid concentrationsAdolescent obesityFat massLean adolescentsImpaired stimulationPhysiological incrementsFFA levelsGlucose metabolismIndirect calorimetry
1980
Effect of hyperglycemia independent of changes in insulin or glucagon on lipolysis in the conscious dog
Shulman G, Williams P, Liljenquist J, Lacy W, Keller U, Cherrington A. Effect of hyperglycemia independent of changes in insulin or glucagon on lipolysis in the conscious dog. Metabolism 1980, 29: 317-320. PMID: 6103495, DOI: 10.1016/0026-0495(80)90004-9.Peer-Reviewed Original ResearchConceptsArterial plasma glucose concentrationDirect antilipolytic effectHepatic glycerol uptakeFree fatty acid concentrationsInfusion of somatostatinContinuous glucose infusionPlasma glucose concentrationBlood glycerol levelsHyperglycemia independentConscious dogsBlood glycerolFatty acid concentrationsPancreatic hormonesAntilipolytic effectGlucose infusionBasal levelsSignificant decreaseGlycerol levelsGlucose concentrationHyperglycemiaInfusionGlucagonInsulinFractional extraction