Journal: Cell reports
Article Title: A cancer-associated METTL14 mutation induces aberrant m6A modification, affecting tumor growth.
doi: 10.1016/j.celrep.2023.112688
Figure Lengend Snippet: Figure 7. Mutant METTL14-mediated aber- rant m6A modifications destabilize c-MET mRNA (A) A GSEA was performed for the genes upregu- lated by c-MET between METTL14+/+ and METTL14Mu/Mu clones. The FDR q value is indi- cated in the panel. (B) The expression of c-MET mRNA relative to that of GAPDH mRNA was quantified by qPCR and is displayed as the mean ± SEM by setting the mean value of wild-type HEC108 cells (METTL14+/+) as one. Significant differences are indicated by as- terisks (Mann-Whitney U tests; *p < 0.05, ns, no significance). (C) Representative images of western blot analysis of c-MET expression in HEC108 cells of each ge- notype (left panel). The level of c-MET expression was quantified by normalizing it to that of GAPDH (right panel). Significant differences are indicated by asterisks (Mann-Whitney U tests; *p < 0.05, ns, no significance). (D) MeRIP-seq peaks identified in c-MET mRNA for each genotype are indicated with black boxes. Differential methylation sites analyzed by exome- Peak are indicated. (E) After transcription was inhibited by the addition of Act.D, the amount of remaining c-MET mRNA was quantified by qPCR 8 h after Act.D treatment. The amount of c-MET mRNA is displayed as the mean ± SEM by setting the initial amount for each genotype as 100%. Significant difference is indi- cated by an asterisk (Mann-Whitney U tests; *p < 0.05). (F) The effect of foretinib, a c-MET kinase inhibitor, on the expression levels of c-MET, phosphorylated c-MET, and c-Myc in each indicated clone was determined by western blotting. The expression of GAPDH is shown as a reference. (G) Cell viability of the indicated HEC108 clones was analyzed in the presence of foretinib. The cell viability without foretinib was set as one. Mu = R298P.
Article Snippet: HEC108-derived cells were seeded into 96-welled microplates in the presence of either the c-Myc-Max dimerization inhibitor 10058-F4 (ab145065; Abcam) or the ATP-competitive c-MET kinase inhibitor foretinib (GSK1363089, Selleck) at various concentrations.
Techniques: Mutagenesis, Clone Assay, Expressing, MANN-WHITNEY, Western Blot, Methylation