Journal: Nature Metabolism
Article Title: Skeletal muscle from TBC1D4 p.Arg684Ter variant carriers is severely insulin resistant but exhibits normal metabolic responses during exercise
doi: 10.1038/s42255-024-01153-1
Figure Lengend Snippet: a , Graphical representation of the EHC. b , GIR during the insulin clamp. c – e , GIR ( c ), endogenous glucose rate of appearance (RA) ( d ) and glucose rate of disappearance (RD) ( e ) at 120 min of the clamp. f , Plasma FAs during the clamp. g , Average leg glucose uptake during the last 40 min of the clamp. h , Targeted immunoblotting analyses of proteins associated with glucose metabolism, fat metabolism and the mitochondrial electron transport chain in skeletal muscle. i , Volcano plot showing proteome log 2 fold change (FC) (carriers/controls) plotted against –log 10 P value highlighting downregulated proteins TBC1D4, TBC1D1 and GLUT4 (SLC2A4). *Difference between TBC1D4 carriers and controls at the given time point. ‡Different from basal (time 0) within the same group. n = 5 ( b – g , i ). n = 7 ( h ) except for mTOR, p70S6K and ACC ( n = 5 in controls and TBC1D4 carriers) as well as Akt2, AMPKα2, CS, CD36 and FATP4 ( n = 6) in controls and GLUT1 ( n = 6) in TBC1D4 carriers. Data are means ± s.e.m. Data were analysed using a two-tailed paired Student’s t -test ( c – e , g ), a two-tailed non-paired Student’s t -test ( h ) as well as a two-way repeated ANOVA test (two-factor repeated) and two-tailed Student–Newman–Keuls post hoc analyses for multiple comparisons ( b , f ). Graphics in a created using BioRender.com . a.u., arbitrary units.
Article Snippet: For staining, four to six individual fibres were teased out from the fixed fibre bundles with fine forceps and blocked for 2 h in PBS containing 5% goat serum, 1% BSA and 0.04% saponin and then incubated overnight with primary antibody raised against GLUT4 (rabbit polyclonal; no. PA5-23052; lot WJ3403509, Thermo Scientific).
Techniques: Western Blot, Two Tailed Test