A new mouse could help understand how some lung cancer cells evade drug treatment

Lung cancer is the leading cause of cancer mortality worldwide and lung adenocarcinoma is the most common type. Many cases of lung adenocarcinoma are attributed to a mutation in a gene for the epidermal growth factor receptor (EGFR). Lung cancer with changes in EGFR is initially treatable with a family of chemotherapeutic agents called tyrosine kinase inhibitors (TKIs), such as gefitinib and erlotinib. However, patients often develop resistance to these drugs through the acquisition of additional changes or secondary mutations that allow cancer cells to evade treatment.

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