The AmoyDx EGFR Mutations Detection Kit is a sensitive and selective assay for the detection of the most informative somatic mutations in the epidermal growth factor receptor (EGFR) gene. It is used clinically in China to select NSCLC patients who are most likely to respond to Iressa (Gefitinib) or Tarceva (Erlotinib). AmoyDx works closely with AstraZeneca in China to promote the use of molecular diagnostic tests for patient stratification.
The EGFR assay tests for a total of 29 mutations in eight PCR tubes, including both activating and resistance mutations. The presence of activating mutations indicates predicted response to mutant EGFR-targeting drugs. If the tumor tissue harbors resistance mutations, it may respond poorly to therapies designed to inhibit EGFR signalling.
The American Society for Clinical Oncology (ASCO) recommends that patients with NSCLC who are being considered for first-line therapy with an EGFR TKI (patients who have not previously received chemotherapy or an EGFR TKI) should have their tumor tested for EGFR mutations to determine whether an EGFR TKI or chemotherapy is the appropriate first-line therapy. (Keedy, V.L. et al. (2011) J. Clin. Oncol. 29(15), 2121).
The European Committee for Medicinal Products for Human Use (CHMP) recommended that EGFR mutation status be tested in patients with metastatic non-small cell lung cancer to predict sensitivity to Iressa. (EPAR summary for the public. EMEA/280173/2009. EMEA/H/C/1016).