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Anaplastic Lymphoma Kinase as a Therapeutic Target in Non–Small Cell Lung Cancer

AbstractThe therapeutic targeting of anaplastic lymphoma kinase (ALK) has been a burgeoning area of research since 2007 when ALK fusions were initially identified in patients with non–small cell lung cancer. The field has rapidly progressed through development of the first-generation ALK inhibitor, crizotinib, to an understanding of mechanisms of acquired resistance to crizotinib and is currently witnessing an explosion in the development of next-generation ALK inhibitors such as ceritinib, alectinib, PF-06463922, AP26113, X-396, and TSR-011. As with most targeted therapies, acquired resistance appears to be an inevitable outcome. Current preclinical and clinical studies are focused on the development of rational therapeutic strategies, including novel ALK inhibitors, as well as rational combination therapies to maximize disease control by delaying or overcoming acquired therapeutic resistance. This review summarizes the existing clinical data and ongoing research pertaining to the clinical application of ALK inhibitors in patients with non–small cell lung cancer.