IZCZ-3 induces only weak growth inhibition in the BJ fibroblasts (IC50=15.9 μM) and mouse mesangial cells (IC50=15.6 μM), suggesting that IZCZ-3 is more effective against cancer cells than against c-MYC-independent normal cells. IZCZ-3 (0-5 μM; 12 hours) induces an apparent accumulation of cells in the G0/G1 phase in SiHa cells in a dose-dependent manner.IZCZ-3 (2.1 μM-15.9 μM; 24 hours) significantly inhibits SiHa, HeLa, Huh7, and A375 cancer cell proliferation (IC50s of 3.3, 2.1,4.1, and 4.2 μM, respectively).

IZCZ-3 inhibits tumor growth in BALB/c nude mice with SiHa human cervical squamous cancer xenograft.