Background:
More than half of colorectal tumors harbor activating mutations in RAS/RAF proteins. Selumetinib (AZD6244, ARRY-142886) is a small molecule kinase inhibitor targeting MEK kinase, downstream of RAS. We examined the efficacy and safety of selumetinib with irinotecan in second-line therapy.
Methods:
Patients with K-RAS mutated colorectal cancer, progressing on first-line oxaliplatin‐based chemotherapy with bevacizumab, were eligible for this multicenter openlabel phase I/II trial. In part A, a dose was determined using a standard “3 + 3” design; in part B, efficacy was determined. The primary endpoint was RECIST response rate. Historical data for irinotecan were used as reference. Secondary endpoints included progression-free survival and overall survival.
Used by permission: Howard Hochster, MD, Yale University