Mammary tumor growth curves in NSG mice implanted with MDA231-LM2 or SUM159-LM1 cells and treated with paclitaxel as single agent or in combination with JNKi. Each value represents the mean ± SEM. MDA231-LM2: n = 12 tumors per group. SUM159-LM1: vehicle, JNKi and PAX n = 12 tumors per group; PAX + JNKi n = 10 tumors. **P < 0.01, ***P < 0.001. 