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Unresectable metastatic colorectal cancer (CRC) can be rendered resectable with systemic chemotherapy in approximately 20% of cases. Most patients with metastatic CRC receive chemotherapy with the addition of targeted therapy with anti–vascular endothelial growth factor (VEGF) or anti–epidermal growth factor receptor (EGFR) antibodies. We sought to determine whether anti-VEGF receptor (VEGFR) or anti-EGFR therapy would impair liver regeneration after partial hepatectomy (PH) in mice.

Mice underwent either 66% PH or sham laparotomy. In the first experiment, mice in the PH group were randomly assigned to receive daily intraperitoneal injections of monoclonal antibodies (MoABs) to murine VEGFR-2 or nonspecific MoABs (control). In the second experiment, mice in the PH group were randomly assigned to receive intraperitoneal injections of …