Type II topoisomerase inhibitor 1 可用于抗菌领域。Type II topoisomerase inhibitor 1 是大肠杆菌DNA 旋转酶的选择性抑制剂,IC50值为 1.7 nM,并能与 Asp73 残基形成氢键。Type II topoisomerase inhibitor 1 抑制拓扑异构酶 IV 的活性,IC50值为 0.98 μM。
Topoisomerase II inhibitor 3 (Compound 6 h) is an acridone derivative that acts as a Type II DNA topoisomerase (topo II) inhibitor. It specifically inhibits the topo IIα/β subtypes, with an IC50 value of 0.17 μM for topo IIα and 0.23 μM for topo IIβ. This compound elicits significant DNA damage and induces apoptosis by triggering the loss of mitochondrial membrane potential [1].
Topoisomerase I inhibitor 5 is an efficient inhibitor of topoisomerase I, with an IC50 value. It effectively disrupts DNA and inhibits the activity of topoisomerase I. Moreover, it can induce apoptosis in MCF-7 cells and arrest the cell cycle at the G1 phase. Topoisomerase I inhibitor 5 also exhibits potency in reversing P-gp-mediated resistance to Adriamycin [1].
Topoisomerase I inhibitor 4 (compound 7a) is a potent inhibitor of topoisomerase I activity. It effectively inhibits the proliferation of various cancer cell lines including HepG2, A549, MCF-7, and HeLa, with IC50 values of 1.20 μM, 2.09 μM, 1.56 μM, and 1.92 μM, respectively. Thus, Topoisomerase I inhibitor 4 holds promise for cancer research applications [1].