Journal: Advanced Science
Article Title: METTL14‐Induced M 6 A Methylation Increases G6pc Biosynthesis, Hepatic Glucose Production and Metabolic Disorders in Obesity
doi: 10.1002/advs.202417355
Figure Lengend Snippet: METTL14 m 6 A‐dependently increases G6pc mRNA stability and translation in hepatocytes. A) Huh7 cells were cotransfected with METTL14 and G6pc plasmids for 2 days. METTL14‐bound G6pc mRNA was measured using METTL14‐linked RIP ( n = 3 per group). B) Mettl14 f/f males were transduced with AAV8‐TBG‐GFP or AAV8‐TBG‐Cre vector for 6 weeks (on HFD). METTL14‐bound G6pc mRNA was measured in the liver using RIP assays ( n = 3 mice per group). C) Levels of m 6 A‐marked G6pc mRNA were measured in primary hepatocytes using MeRIP (normalized to G6pc input; n = 3 per group). D) Liver m 6 A distribution across the G6pc gene between Mettl14 f/f and Mettl14 Δ hep males. E) C57BL/6J mice were transduced with adeno‐METTL14 or adeno‐GFP vector ( n = 3 per group). 2 weeks later, liver m 6 A‐marked G6pc mRNA was measured using MeRIP (normalized to G6pc mRNA input). F) Huh7 cells were cotransfected with METTL14 and G6pc plasmids. 12 hours later, cells were treated with STM2457 (5 µg mL −1 ) for 36 h to measure m 6 A‐marked G6pc mRNA (normalized to G6pc mRNA input, DMSO as control, n = 3 per group). G) Primary hepatocytes were treated with actinomycin D to measure G6pc mRNA stability ( n = 3 mice per group). H) Primary hepatocyte culture (C57BL/6J males) was transduced with adeno‐METTL14 or adeno‐GFP vector for 24 h. G6pc mRNA decays were assessed using actinomycin D ( n = 3 mice per group). I) Poly‐bound and mono‐bound G6pc mRNA were measured in primary hepatocytes from males (8 weeks). J) OPP assays on primary hepatocytes to assess G6pc translation (normalized to G6pc input; n = 3 mice per group). K,L) Primary hepatocyte culture (C57BL/6J males) was transduced with adeno‐METTL14 or adeno‐GFP vector. Poly/mono‐bound G6pc mRNA and G6pc translation (OPP assays) were measured 48 and 24 h later, respectively ( n = 3 mice per group). M–O) Huh7 cells were cotransfected with METTL14 and G6pc or G6pc Δ 5A plasmids for 2 days. G6pc mRNA m 6 A methylations (normalized to G6pc input) and G6pc mRNA levels (normalized to GAPDH levels) were measured. Cell extracts were immunoblotted with anti‐G6pc antibody to measure G6pc levels (normalized to p85 levels, N = 3 per group). P) Huh7 cells were cotransfected with METTL14 and G6pc or G6pc Δ 5A plasmids for 36 h and then treated with actinomycin D. G6pc mRNA levels were measured and normalized to the initial values ( n = 3 per group). Data are presented as mean ± SEM. * p < 0.05, ** p < 0.01, *** p < 0.001, two‐sided unpaired t ‐test (A–C, E, I–L), two‐way ANOVA with Šidák's multiple‐comparison test (G,H,P) and one‐way ANOVA with Tukey's multiple‐comparison test (M–O).
Article Snippet: [ ] The RefSeq gene annotation files including G6pc were downloaded from the University of California, Santa Cruz (UCSC) browser.
Techniques: Transduction, Plasmid Preparation, Control, Comparison