From a therapeutic perspective, our findings indicate that miR-30c and miR-21 inhibition halts lung tumorigenesis in vitro and in vivo by switching off simultaneously KRAS effector signalings such as PI3K/AKT, ERKs, and the NF-κB pathways and that these microRNAs could be potential biomarkers for NSCLC early detection and to stratify KRAS-driven NSCLC. The gene discussed is KRAS; the disease is non-small cell lung carcinoma.