Non-small cell lung cancer (Homo sapiens)
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Description
Non-small cell lung cancer (NSCLC) represents 85% of lung cancer and is defined as any type of epithelial lung cancer that is NOT small cell carcinoma, including squamous cell (SCC), adeno (AC) and large-cell carcinoma.
Mutations in NSCLC:
- KRAS (mutated in ~29% of NSCLC patients) inactivates its GTPase activity and the p21-RAS protein continuously transmits growth signals to the nucleus.
- Mutations or overexpression of EGFR (~22% of NSCLC patients) leads to increased proliferation.
- The abnormal fusion of EML4-ALK (~5% of NSCLC patients) leads to constitutive ALK activation, which causes cell proliferation, invasion, and inhibition of apoptosis.
- Inactivating mutation of p53 (~50% of NSCLC patients) leads to reduced apoptosis and proliferation.
- The protein encoded by the p16INK4a, CDKN2A, inhibits formation of CDK-cyclin-D complexes by competitive binding of CDK4 and CDK6. p16INK4a is mutated in ~12% of NSCLC patients, which leads to a loss of this inhibitory effect.
- RARB is a nuclear retinoic acid receptor whose function is often lost in NSCLC, leading to a loss of cell growth control.
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Bibliography
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- Connolly RM, Nguyen NK, Sukumar S; ''Molecular pathways: current role and future directions of the retinoic acid pathway in cancer prevention and treatment.''; Clin Cancer Res, 2013 PubMed Europe PMC Scholia
- Riely GJ, Smit EF, Ahn MJ, Felip E, Ramalingam SS, Tsao A, Johnson M, Gelsomino F, Esper R, Nadal E, Offin M, Provencio M, Clarke J, Hussein M, Otterson GA, Dagogo-Jack I, Goldman JW, Morgensztern D, Alcasid A, Usari T, Wissel P, Wilner K, Pathan N, Tonkovyd S, Johnson BE; ''A plain language summary of the PHAROS study: the combination of encorafenib and binimetinib for people with BRAF V600E-mutant metastatic non-small-cell lung cancer.''; Future Oncol, 2024 PubMed Europe PMC Scholia
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- Kwak EL, Bang YJ, Camidge DR, Shaw AT, Solomon B, Maki RG, Ou SH, Dezube BJ, Jänne PA, Costa DB, Varella-Garcia M, Kim WH, Lynch TJ, Fidias P, Stubbs H, Engelman JA, Sequist LV, Tan W, Gandhi L, Mino-Kenudson M, Wei GC, Shreeve SM, Ratain MJ, Settleman J, Christensen JG, Haber DA, Wilner K, Salgia R, Shapiro GI, Clark JW, Iafrate AJ; ''Anaplastic lymphoma kinase inhibition in non-small-cell lung cancer.''; N Engl J Med, 2010 PubMed Europe PMC Scholia
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