2022
Distinct subcellular localisation of intramyocellular lipids and reduced PKCε/PKCθ activity preserve muscle insulin sensitivity in exercise-trained mice
Gaspar R, Lyu K, Hubbard B, Leitner B, Luukkonen P, Hirabara S, Sakuma I, Nasiri A, Zhang D, Kahn M, Cline G, Pauli J, Perry R, Petersen K, Shulman G. Distinct subcellular localisation of intramyocellular lipids and reduced PKCε/PKCθ activity preserve muscle insulin sensitivity in exercise-trained mice. Diabetologia 2022, 66: 567-578. PMID: 36456864, PMCID: PMC11194860, DOI: 10.1007/s00125-022-05838-8.Peer-Reviewed Original ResearchConceptsProtein kinase CsSubcellular compartmentsDistinct subcellular localisationMuscle insulin sensitivityMultiple subcellular compartmentsInsulin receptor kinaseNovel protein kinase CsActivation of PKCεSubcellular localisationPKCθ translocationReceptor kinasePlasma membraneSubcellular distributionTriacylglycerol contentCrucial pathwaysIntramuscular triacylglycerol contentRC miceDiacylglycerolConclusions/interpretationThese resultsPKCεPM compartmentPhosphorylationMuscle triacylglycerol contentSkeletal muscleRecent findings
2021
335-OR: Lipid-Induced Insulin Resistance in the Renal Cortex Is Associated with Plasma Membrane Sn-1,2-diacylglycerol Accumulation and PKCe Translocation
HUBBARD B, GASPAR R, ZHANG D, KAHN M, NASIRI A, ZHANG X, CLINE G, SHULMAN G. 335-OR: Lipid-Induced Insulin Resistance in the Renal Cortex Is Associated with Plasma Membrane Sn-1,2-diacylglycerol Accumulation and PKCe Translocation. Diabetes 2021, 70 DOI: 10.2337/db21-335-or.Peer-Reviewed Original ResearchHigh-fat dietInsulin receptorInsulin resistanceLipid-Induced Insulin ResistanceRC miceProtein kinase CεRegular chowHFD miceRenal cortexCitrate synthase fluxHyperinsulinemic-euglycemic clamp conditionsAktS473 phosphorylationFatty acid fluxPyruvate oxidationPKCε translocationPyruvate dehydrogenase fluxPhosphorylationDiacylglycerol accumulationHFD feedingFat dietSpouse/partnerFold increaseSynthase fluxTranslocationIonis Pharmaceuticals