Epidermal growth factor receptor tyrosine kinase inhibitors as initial therapy for non- small cell lung cancer: Focus on epidermal growth factor receptor.

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Epidermal growth factor receptor tyrosine kinase inhibitors as initial therapy for non- small cell lung cancer: Focus on epidermal growth factor receptor mutation testing and mutation-positive patients  Monic Roengvoraphoj, Gregory J. Tsongalis, Konstantin H. Dragnev, James R. Rigas  Cancer Treatment Reviews  Volume 39, Issue 8, Pages 839-850 (December 2013) DOI: 10.1016/j.ctrv.2013.05.001 Copyright © 2013 The Authors Terms and Conditions

Fig. 1 The EGFR signaling pathway. Upon ligand binding, EGFR or another ErbB family member dimerizes and is activated through phosphorylation of its intracellular tyrosine kinase domain. This leads to signal transduction through several downstream pathways that regulate apoptosis and cell proliferation. Abbreviations: EGFR, epidermal growth factor receptor; ErbB, erythroblastic leukemia viral oncogene homolog; PI3K, phosphoinositide-3-kinase; AKT, protein kinase B; RAS, retrovirus-associated DNA sequences; RAF, v-raf 1 murine leukemia viral oncogene homolog 1; MEK, mitogen-activated protein kinase kinase; MAPK, mitogen-activated protein kinase; JAK, Janus tyrosine kinase; STAT, signal transducers and activators of transcription. Cancer Treatment Reviews 2013 39, 839-850DOI: (10.1016/j.ctrv.2013.05.001) Copyright © 2013 The Authors Terms and Conditions

Fig. 2 Frequency of mutations in exons 18–21 of the EGFR gene and the association with responsiveness to EGFR TKIs. Diagram depicting the locations and frequencies of EGFR gene mutations detected in the tumors of patients with NSCLC. The most common EGFR mutations are exon 19 deletions and exon 21 point mutations at codon 858, which together account for approximately 80–90% of cases. Reprinted with permission from Macmillan Publishers Ltd: Modern Pathology,30 © 2012. Abbreviations: EGFR, epidermal growth factor receptor; TKI, tyrosine kinase inhibitor; NSCLC, non-small cell lung cancer. Cancer Treatment Reviews 2013 39, 839-850DOI: (10.1016/j.ctrv.2013.05.001) Copyright © 2013 The Authors Terms and Conditions