Liquid Biopsies in NSCLCTuesday, 17 November 2015 at 15:00 Add to Calendar ▼SELECTBIOenquiries@selectbiosciences.com ALK inhibitors have shown efficacy in Non-Small Cell Lung cancer (NSCLC) patients whose tumors have activating rearrangements comprising ALK kinase. ALK rearrangements are routinely assessed in formalin-fixed samples by FISH, IHC or NGS. Unfortunately, patients progress after therapy with ALK inhibitors because of the appearance of secondary activating mutations in ALK and other escape pathways, which leads to acquired resistance. Quantitative assessment of dynamic changes of ALK rearrangement in plasma could be used as an indicator of initial treatment response, and appearance of secondary mutations could indicate development of acquired resistance. We will present data from plasma samples of patients enrolled in phase 2 studies treated with the ALK inhibitor alectinib. These results suggest that cell free DNA in plasma is a useful method to assess response and resistance in NSCLC. |