Abstract

Background: Mutations in KRAS account for ∼25% of lung cancer cases and are refractory to therapy. Tumors with KRAS mutations encounter increased levels of genotoxic, proteotoxic and metabolic stress, which disrupt proliferation and homeostasis. The Integrated Stress Response (ISR) plays a key role in adaptation to stress via phosphorylation of eukaryotic initiation factor 2 (p-eIF2). When ISR is activated, p-eIF2 mediates translational and transcriptional reprogramming of genes with roles in survival and adaptation. Here we demonstrate the importance of ISR in the development of KRAS lung adenocarcinoma (LUAD), the most common histological type of lung cancer and a leading cause of cancer death worldwide.

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