Figure 7. Activation of MYC-dependent gene expression in KRAS mutant lung adenocarcinomas.
A. Heatmap of 82 MYC-dependent genes in 58 lung adenocarcinomas (GSE32867) demonstrating increased gene expression in KRAS mutant tumors (n=22) (denoted by black hash marks below heatmap) as compared to KRAS wild-type tumors (n=36). Samples displaying overexpression of MYC target genes are enclosed within a thick black rectangle. B. Relative MYC gene expression in KRAS wild-type (WT) and mutant (MUT) tumors. C. Relative MYC gene expression in EGFR wild-type and mutant tumors. Graphs display mean±SEM of MYC gene expression normalized to the median value of wild-type tumors. D. Heatmap of 82 MYC-dependent genes in 38 lung adenocarcinomas (GSE29066) demonstrating increased gene expression in KRAS mutant tumors (n=12) as compared to KRAS wild-type tumors (n=26). Pearson correlation analysis of MUC1 and MYC gene expression in KRAS mutant (E) and wild-type (F) tumors.