“About 3-5 percent of lung cancers are caused by changes in the gene ALK. In 2011, the FDA granted accelerated approval for the drug crizotinib to target these ALK changes. However, two major problems have remained: Crizotinib does not pass into the brain and so is unable to target ALK-positive lung cancer in the central nervous system, and the genetic diversity of cancer allows the later growth of subpopulations that can resist the drug, leading to renewed growth. In response, researchers have been actively developing next-generation ALK-inhibitors.
“Results of a multi-center, 222-person phase 2 clinical trial of the next-generation ALK inhibitor, brigatinib at 180mg/day, used after failure of crizotinib showed a 54 percent response rate and 12.9 month progression-free survival. (Effects were lower at a lower dose.) Results are published in the Journal of Clinical Oncology.”
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