(A and B) In vivo primary tumor growth derived from BT549 cells with Luciferase or MIG-6 knockdown (six mice per group). Cells were injected into the mammary fat pads of nude mice, and tumor sizes were measured weekly by caliper. Kaplan-Meier plot analysis is used to determine the incidence of Luciferase or MIG-6 knockdown BT549-xenograft tumors (A). Volumes of Luciferase or MIG-6 knockdown BT549 tumors at week 10 are presented as mean ± SEM (B). 