99009-20-8 吡唑并吖啶

• 生物活性 Pyrazoloacridine (NSC 366140) 具有抗癌活性，抑制拓扑异构酶 1 和 2 的活性 (topoisomerases 1 and 2)。Pyrazoloacridine (NSC 366140) 对 K562 髓系白血病细胞中的 IC50 值为 1.25 μM (24 h)。
• 体外研究 Pyrazoloacridine (NSC 366140, PD 115934) exhibits IC 50 values of 10.7 μM and 4.5 μM for oxic and hypoxic HCT-8 cells. Pyrazoloacridine (NSC 366140, 2-4 μM) abolishes the catalytic activity of both topo I and topo II in vitro. Pyrazoloacridine (NSC 366140) displays activity against cisplatin- and paclitaxel-resistant ovarian cancer. Pyrazoloacridine (NSC 366140) has been shown to cause delayed DNA fragmentation in MCF-7 breast cancer cells. Pyrazoloacridine (NSC 366140) induces apoptosis in P53-deficient Hep 3B human hepatoma cells. Cell Cytotoxicity Assay Cell Line: K562 Myeloid Leukemia Cells. Concentration: 0-500 μM. Incubation Time: 1 h or 24 h. Result: When K562 cells were incubated with PA for 1 h and then plated in soft agar, an IC 50 of -50 μM was observed. In contrast, when cells were incubated for 24 h with PA, the IC 50 was 1.25 μM.

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