Differential effects of p95HER2 and FL-HER2 on gene expression in PB2 mouse breast tumor xenografts at early and late stages.

To explore how p95HER2 regulates gene expression to promote tumor growth in immunocompetent mice, we engineered PB2 mouse breast cancer cells to express either p95HER2 or control FL-HER2 under the control of doxycycline. Both FL-HER2 and p95HER2 cells were implanted to the mammary fat pads of immunocompetent C57BL/6 mice that were placed under a DOX625 doxycycline diet. Tumor xenografts were harvested 10 and 22 days after inoculation. We then performed transcriptomic analysis using RNA-seq data from PB2-FL-HER2 and PB2-p95HER2 tumors.