Despite an improvement of prognosis in breast and colon cancer, the outcome of the metastatic disease is still severe. Microevolution of cancer cells often leads to drug resistance and tumor-recurrence. To target the driving forces of the tumor microevolution, we focused on synergistic drug combinations of selected compounds. | Synergisms of genome and metabolism stabilizing antitumor therapy GMSAT in human breast and colon cancer cell lines A novel approach to screen for synergism