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Dual blockade of epidermal growth factor receptor and insulin‐like growth factor receptor–1 signaling in metastatic pancreatic cancer: Phase Ib and randomized phase II trial of gemcitabine, erlotinib, and cixutumumab versus gemcitabine plus erlotinib (SWOG S0727)

Targeting a single pathway in pancreatic adenocarcinoma (PC) is unlikely to affect its natural history. We tested the hypothesis that simulataneous targeting of the epidermal growth factor receptor (EGFR) and insulin‐like growth factor receptor–1 (IGF‐1R) pathways would significantly improve progression‐free survival (PFS) by abrogating reciprocal signaling that promote drug resistance