Featured Publications
Lower Hepatic Fat Is Associated With Improved Insulin Secretion in a High-Risk Prediabetes Subphenotype During Lifestyle Intervention
Wagner R, Heni M, Kantartzis K, Sandforth A, Machann J, Schick F, Peter A, Fritsche L, Szendrödi J, Pfeiffer A, Schürmann A, Blüher M, Hauner H, Seissler J, Bornstein S, Roden M, Stefan N, Birkenfeld A, White M, Häring H, Fritsche A. Lower Hepatic Fat Is Associated With Improved Insulin Secretion in a High-Risk Prediabetes Subphenotype During Lifestyle Intervention. Diabetes 2022, 72: 362-366. PMID: 36525512, PMCID: PMC9935494, DOI: 10.2337/db22-0441.Peer-Reviewed Original ResearchConceptsInsulin secretionLifestyle interventionLiver fatOral glucose tolerance testHigh liver fatLifestyle intervention studyGlucose tolerance testHigh-risk clustersHepatic fatTolerance testInsulin sensitivitySpecific subphenotypesIntervention studiesSecretionTime pointsInterventionPrediabetesGlycemic traitsFatSubphenotypesGlycemiaCluster 3
2018
Metabolic Dysfunction within Brown Adipose Tissue and Skeletal Muscle Caused by Complete Hepatic Insulin Resistance Is Reversible by FGF-21 Treatment
STOEHR O, TAO R, COPPS K, WHITE M. Metabolic Dysfunction within Brown Adipose Tissue and Skeletal Muscle Caused by Complete Hepatic Insulin Resistance Is Reversible by FGF-21 Treatment. Diabetes 2018, 67 DOI: 10.2337/db18-1873-p.Peer-Reviewed Original ResearchHepatic insulin resistanceFGF-21Insulin resistanceGlucose toleranceSkeletal muscleGlucose uptakeAdipose tissue markersFGF-21 treatmentSkeletal muscle dysfunctionSystemic insulin resistanceBetter glucose toleranceSystemic glucose homeostasisDouble knockout miceBrown adipose tissueDeletion of FoxO1Hepatokine secretionThermogenesis markersHepatic infectionBody core temperatureGlucose intoleranceMuscle dysfunctionSevere hyperglycemiaControl miceInsulin sensitivityMetabolic dysfunctionInactivating hepatic follistatin alleviates hyperglycemia
Tao R, Wang C, Stöhr O, Qiu W, Hu Y, Miao J, Dong X, Leng S, Stefater M, Stylopoulos N, Lin L, Copps K, White M. Inactivating hepatic follistatin alleviates hyperglycemia. Nature Medicine 2018, 24: 1058-1069. PMID: 29867232, PMCID: PMC6039237, DOI: 10.1038/s41591-018-0048-0.Peer-Reviewed Original ResearchConceptsHepatic glucose productionAdipose tissue insulinGlucose toleranceTissue insulinSuppression of HGPGastric bypass surgeryFed obese miceHepatic insulin resistanceWhite adipose tissuePotential clinical significanceInsulin receptor substrate-1Bypass surgeryGlucose intoleranceHepatic inactivationObese miceInsulin resistanceObese individualsGlycated hemoglobinTranscription factor FOXO1Insulin sensitivityNormal suppressionClinical significanceReceptor substrate-1Adipose tissueExpression of Fst
2017
Endotoxemia-mediated activation of acetyltransferase P300 impairs insulin signaling in obesity
Cao J, Peng J, An H, He Q, Boronina T, Guo S, White M, Cole P, He L. Endotoxemia-mediated activation of acetyltransferase P300 impairs insulin signaling in obesity. Nature Communications 2017, 8: 131. PMID: 28743992, PMCID: PMC5526866, DOI: 10.1038/s41467-017-00163-w.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell Line, TumorE1A-Associated p300 ProteinEndoplasmic Reticulum StressEndotoxemiaGene Expression ProfilingImmunoblottingInsulinInsulin ResistanceLipopolysaccharidesLiverMaleMembrane ProteinsMice, Inbred C57BLMice, ObeseObesityProtein Serine-Threonine KinasesReceptor, InsulinSignal TransductionX-Box Binding Protein 1ConceptsInsulin resistanceP300 acetyltransferase activityHigh-fat diet-fedChronic low-grade inflammationObese ob/ob miceOb/ob miceLow-grade inflammationDiet-induced obesityAcetyltransferase activityElevated plasma concentrationsPromising therapeutic targetCytoplasm of hepatocytesEndoplasmic reticulum stressObese patientsObese miceInsulin sensitivityIntestinal permeabilityOb micePlasma concentrationsDisrupts insulinTherapeutic targetImpairs insulinPharmacological inhibitionGlucose productionObesity
2016
Serine 302 Phosphorylation of Mouse Insulin Receptor Substrate 1 (IRS1) Is Dispensable for Normal Insulin Signaling and Feedback Regulation by Hepatic S6 Kinase*
Copps K, Hançer N, Qiu W, White M. Serine 302 Phosphorylation of Mouse Insulin Receptor Substrate 1 (IRS1) Is Dispensable for Normal Insulin Signaling and Feedback Regulation by Hepatic S6 Kinase*. Journal Of Biological Chemistry 2016, 291: 8602-8617. PMID: 26846849, PMCID: PMC4861431, DOI: 10.1074/jbc.m116.714915.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SubstitutionAnimalsCHO CellsCricetinaeCricetulusGene DeletionGlucose IntoleranceInsulinInsulin Receptor Substrate ProteinsLiverMechanistic Target of Rapamycin Complex 1MiceMice, TransgenicMultiprotein ComplexesMutation, MissensePhosphatidylinositol 3-KinasesPhosphorylationProto-Oncogene Proteins c-aktRibosomal Protein S6 KinasesSerineSignal TransductionTOR Serine-Threonine KinasesTuberous Sclerosis Complex 1 ProteinTumor Suppressor ProteinsConceptsInsulin receptor substrate-1Receptor substrate-1PI3K associationS6 kinaseSubstrate-1Insulin-stimulated Akt activityAkt phosphorylationK associationRapamycin complex 1S6K signalingInsulin-stimulated IRS1 tyrosine phosphorylationSer-302IRS1 tyrosine phosphorylationMTORC1 inhibitor rapamycinRibosomal S6 proteinTsc1 deletionFeedback phosphorylationIntracellular amino acidsInsulin sensitivityTyrosine phosphorylationAlanine mutationsS6 proteinS6KAkt activityInsulin signaling
2013
IRS1Ser307 phosphorylation does not mediate mTORC1-induced insulin resistance
Herrema H, Lee J, Zhou Y, Copps K, White M, Ozcan U. IRS1Ser307 phosphorylation does not mediate mTORC1-induced insulin resistance. Biochemical And Biophysical Research Communications 2013, 443: 689-693. PMID: 24333417, PMCID: PMC3926104, DOI: 10.1016/j.bbrc.2013.12.023.Peer-Reviewed Original ResearchConceptsInsulin resistanceGlucose intoleranceInsulin sensitivityImpaired insulin receptorStress-induced insulin resistanceRapamycin complex 1 (mTORC1) activityPhosphorylation of IRS1Endoplasmic reticulum stressDiabetic miceER stress-induced insulin resistanceMammalian targetIRS1 phosphorylationReticulum stressMiceIntoleranceInsulin receptorVivoSer307
2009
The IRS2 Gly1057Asp Variant Is Associated With Human Longevity
Barbieri M, Rizzo M, Papa M, Boccardi V, Esposito A, White M, Paolisso G. The IRS2 Gly1057Asp Variant Is Associated With Human Longevity. The Journals Of Gerontology Series A 2009, 65A: 282-286. PMID: 19887537, DOI: 10.1093/gerona/glp154.Peer-Reviewed Original ResearchConceptsInsulin receptor substrate 2Gene polymorphismsYears of ageIGF-1 signalingSs-cell functionInsulin-like growth factor-1 signalingIrs2 branchInsulin resistanceInsulin sensitivityMetabolic covariatesGly1057Asp variantIRS2 geneExtreme old ageLarge population groupsInternal medicineC participantsOlder ageHuman longevityCommon polymorphismsIGF signalingInsulinFurther studiesPopulation groupsAgeWhole populationThe Irs1 Branch of the Insulin Signaling Cascade Plays a Dominant Role in Hepatic Nutrient Homeostasis
Guo S, Copps K, Dong X, Park S, Cheng Z, Pocai A, Rossetti L, Sajan M, Farese R, White M. The Irs1 Branch of the Insulin Signaling Cascade Plays a Dominant Role in Hepatic Nutrient Homeostasis. Molecular And Cellular Biology 2009, 29: 5070-5083. PMID: 19596788, PMCID: PMC2738277, DOI: 10.1128/mcb.00138-09.Peer-Reviewed Original ResearchConceptsHigh-fat dietHepatic nutrient homeostasisIntracerebroventricular insulin infusionSuppression of HGPImpaired glucose toleranceHyperinsulinemic-euglycemic clampHepatic insulin actionHepatic glucose productionHepatic Irs1Cre-loxP approachLivers of controlGlucose toleranceInsulin infusionInsulin Signaling CascadeInsulin sensitivityPostprandial hyperglycemiaGlucose homeostasisInsulin actionPrincipal mediatorGlucose productionLipogenic genesMiceTyrosine phosphorylationLiverIRS2Targeted Disruption of ROCK1 Causes Insulin Resistance in Vivo *
Lee D, Shi J, Jeoung N, Kim M, Zabolotny J, Lee S, White M, Wei L, Kim Y. Targeted Disruption of ROCK1 Causes Insulin Resistance in Vivo *. Journal Of Biological Chemistry 2009, 284: 11776-11780. PMID: 19276091, PMCID: PMC2673246, DOI: 10.1074/jbc.c900014200.Peer-Reviewed Original ResearchMeSH KeywordsAdiposityAnimalsDiabetes Mellitus, Type 2GlucoseGTPase-Activating ProteinsInsulinInsulin Receptor Substrate ProteinsInsulin ResistanceMiceMice, KnockoutObesityPhosphatidylinositol 3-KinasesPhosphorylationProto-Oncogene Proteins c-aktRho-Associated KinasesRibosomal Protein S6 KinasesSignal TransductionConceptsIRS-1Skeletal muscleWhole-body glucose homeostasisInsulin resistanceBody glucose homeostasisCultured cell linesPhosphorylation of AktPhospho-tyrosinesGlucose homeostasisROCK1-deficient miceSerine phosphorylationNovel regulatorTyrosine phosphorylationS6KRho kinase isoformsInsulin sensitivityPhysiological roleGene ablationAbility of insulinInsulin receptorTargeted disruptionPhosphorylationNormal glucose homeostasisGlucose-induced insulin secretionROCK1
2004
Islet-Sparing Effects of Protein Tyrosine Phosphatase-1b Deficiency Delays Onset of Diabetes in IRS2 Knockout Mice
Kushner J, Haj F, Klaman L, Dow M, Kahn B, Neel B, White M. Islet-Sparing Effects of Protein Tyrosine Phosphatase-1b Deficiency Delays Onset of Diabetes in IRS2 Knockout Mice. Diabetes 2004, 53: 61-66. PMID: 14693698, DOI: 10.2337/diabetes.53.1.61.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBlood GlucoseCrosses, GeneticDiabetes Mellitus, Type 1Glucose Tolerance TestInsulinInsulin Receptor Substrate ProteinsIntracellular Signaling Peptides and ProteinsIslets of LangerhansKineticsLeptinMaleMiceMice, KnockoutModels, AnimalPhosphoproteinsProtein Tyrosine Phosphatase, Non-Receptor Type 1Protein Tyrosine PhosphatasesSignal TransductionConceptsPeripheral insulin sensitivityBeta-cell areaBeta-cell functionInsulin sensitivityPancreatic beta cell areaPancreatic beta-cell functionDecreased insulin requirementIrs2 knockout miceBeta cell homeostasisMonths of ageInsulin requirementsPeripheral actionsGlucose toleranceGlucose homeostasisKnockout miceDelay onsetMiceInsulin receptorPTP1B deficiencyDiabetesReceptor complexIRS2Novel roleInsulinDownstream targets
2003
Chapter 72 IRS-Protein Scaffolds and Insulin/IGF Action
White M. Chapter 72 IRS-Protein Scaffolds and Insulin/IGF Action. 2003, 409-419. DOI: 10.1016/b978-012124546-7/50433-2.Peer-Reviewed Original ResearchIRS protein familyMultiple biological processesIRS proteinsIL-9 signalingTissue agingBiological processesIRS-2Growth controlPeripheral insulin sensitivityPeripheral insulin actionType 2 diabetesPancreatic p-cellsCell functionIRS2IGF actionIL-4Insulin sensitivityInflammatory responseInsulin actionInsulin secretionIL-7Immune responseFundamental roleTumor growthP cells
1999
Search for variants of the gene-promoter and the potential phosphotyrosine encoding sequence of the insulin receptor substrate-2 gene: evaluation of their relation with alterations in insulin secretion and insulin sensitivity
Almind K, Frederiksen S, Bernal D, Hansen T, Ambye L, Urhammer S, Ekstrøm C, Berglund L, Reneland R, Lithell H, White M, Van Obberghen E, Pedersen O. Search for variants of the gene-promoter and the potential phosphotyrosine encoding sequence of the insulin receptor substrate-2 gene: evaluation of their relation with alterations in insulin secretion and insulin sensitivity. Diabetologia 1999, 42: 1244-1249. PMID: 10525667, DOI: 10.1007/s001250051299.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAmino Acid SubstitutionBase SequenceDiabetes Mellitus, Type 2Gene FrequencyGenetic Carrier ScreeningGenetic TestingGlucose Tolerance TestHumansInsulinInsulin Receptor Substrate ProteinsInsulin SecretionIntracellular Signaling Peptides and ProteinsMaleMiddle AgedMolecular Sequence DataPedigreePhosphoproteinsPhosphotyrosinePolymorphism, Single-Stranded ConformationalPromoter Regions, GeneticProspective StudiesTwo-Hybrid System TechniquesConceptsType II diabetic patientsII diabetic patientsSerum insulin concentrationsInsulin secretionDiabetic patientsInsulin sensitivityInsulin concentrationsGly1057Asp variantInsulin receptor substrate-2 (IRS-2) geneIntravenous glucose tolerance testGlucose-tolerant offspringGlucose tolerance testGlucose-tolerant subjectsIRS-2Elderly Swedish menMiddle-aged subjectsYoung healthy subjectsAmino acid variantsWildtype carriersDiabetic parentsTolerance testTolerant subjectsHealthy subjectsStudy groupInsulin sensivity