2025
Determinants of increased muscle insulin sensitivity of exercise-trained versus sedentary normal weight and overweight individuals
Pesta D, Anadol-Schmitz E, Sarabhai T, Kamp Y, Gancheva S, Trinks N, Zaharia O, Mastrototaro L, Lyu K, Habets I, Kamp-Bruls Y, Dewidar B, Weiss J, Schrauwen-Hinderling V, Zhang D, Gaspar R, Strassburger K, Kupriyanova Y, Al-Hasani H, Szendroedi J, Schrauwen P, Phielix E, Shulman G, Roden M. Determinants of increased muscle insulin sensitivity of exercise-trained versus sedentary normal weight and overweight individuals. Science Advances 2025, 11: eadr8849. PMID: 39742483, PMCID: PMC11691647, DOI: 10.1126/sciadv.adr8849.Peer-Reviewed Original ResearchConceptsOverweight-to-obeseNormal weightEndurance-trained humansMuscle mitochondrial contentAthlete's paradoxTrained athletesExercise-trainedOverweight individualsAthletesObesity subtypesObservational studyIntramyocellular triglyceride accumulationInsulin sensitivityHigher insulin sensitivityMitochondrial contentIncreased insulin sensitivityMuscleFemale individualsIndividualsInsulin resistanceObesityMitochondrial partitioningIncreased calpainNPKC activityProtein kinase C
2020
A Membrane-Bound Diacylglycerol Species Induces PKCϵ-Mediated Hepatic Insulin Resistance
Lyu K, Zhang Y, Zhang D, Kahn M, Ter Horst KW, Rodrigues MRS, Gaspar RC, Hirabara SM, Luukkonen PK, Lee S, Bhanot S, Rinehart J, Blume N, Rasch MG, Serlie MJ, Bogan JS, Cline GW, Samuel VT, Shulman GI. A Membrane-Bound Diacylglycerol Species Induces PKCϵ-Mediated Hepatic Insulin Resistance. Cell Metabolism 2020, 32: 654-664.e5. PMID: 32882164, PMCID: PMC7544641, DOI: 10.1016/j.cmet.2020.08.001.Peer-Reviewed Original ResearchConceptsPlasma membraneEndoplasmic reticulumHigh-fat diet-induced hepatic insulin resistanceSubcellular fractionation methodInsulin receptor kinaseKey lipid speciesHepatic insulin resistanceDiet-induced hepatic insulin resistanceReceptor kinaseDiacylglycerol acyltransferase 2Molecular mechanismsAcute knockdownPhosphorylationLipid dropletsLipid speciesAcyltransferase 2KnockdownLiver-specific overexpressionDAG accumulationPKCϵDAG contentMembraneFractionation methodKinaseMitochondria
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