[PDF][PDF] The impact of human EGFR kinase domain mutations on lung tumorigenesis and in vivo sensitivity to EGFR-targeted therapies

H Ji, D Li, L Chen, T Shimamura, S Kobayashi… - Cancer cell, 2006 - cell.com
H Ji, D Li, L Chen, T Shimamura, S Kobayashi, K McNamara, U Mahmood, A Mitchell, Y Sun…
Cancer cell, 2006cell.com
To understand the role of human epidermal growth factor receptor (hEGFR) kinase domain
mutations in lung tumorigenesis and response to EGFR-targeted therapies, we generated
bitransgenic mice with inducible expression in type II pneumocytes of two common hEGFR
mutants seen in human lung cancer. Both bitransgenic lines developed lung
adenocarcinoma after sustained hEGFR mutant expression, confirming their oncogenic
potential. Maintenance of these lung tumors was dependent on continued expression of the …
Summary
To understand the role of human epidermal growth factor receptor (hEGFR) kinase domain mutations in lung tumorigenesis and response to EGFR-targeted therapies, we generated bitransgenic mice with inducible expression in type II pneumocytes of two common hEGFR mutants seen in human lung cancer. Both bitransgenic lines developed lung adenocarcinoma after sustained hEGFR mutant expression, confirming their oncogenic potential. Maintenance of these lung tumors was dependent on continued expression of the EGFR mutants. Treatment with small molecule inhibitors (erlotinib or HKI-272) as well as prolonged treatment with a humanized anti-hEGFR antibody (cetuximab) led to dramatic tumor regression. These data suggest that persistent EGFR signaling is required for tumor maintenance in human lung adenocarcinomas expressing EGFR mutants.
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