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Camptothecin (CPT) belongs to the alkaloid group of natural products and is a specific DNA topoisomerase I (Topo I) inhibitor (IC50=679 nM) with specificity. Camptothecin has antitumor activity and induces apoptosis.

Enoxacin hydrate (AT-2266 hydrate) is a broad-spectrum 6-fluoronaphthyridinone antibacterial agent.

Enoxacin (NSC-629661) is a broad-spectrum 6-fluoronaphthyridinone antibacterial agent (fluoroquinolones) structurally related to nalidixic acid.

Cl-amidine hydrochloride is an orally available PAD inhibitor that blocks histone 3 deimination and neutrophil extracellular trap formation and improves survival in septic mice. It induces apoptosis in cancer cells and induces miR-16 to cause cell cycle arrest.

LIN28 inhibitor LI71 is a potent and cell-permeable compound that effectively abolishes LIN28-mediated oligouridylation, with an IC50 of 7 µM (micromolar).

Lin28-let-7a antagonist 1, with an IC50 of 4.03 μM for Lin28A-let-7a-1 interaction,and shows a clear antagonistic effect against the Lin28-let-7a interaction.

PIN1 inhibitor API-1 is a specific Pin1 inhibitor (IC50: 72.3 nM) that retains the active conformation of pXPO5, restoring its ability to transport pre-miRNAs from the nucleus to the cytoplasm, thereby up-regulating anticancer miRNA biogenesis to suppress hepatocellular carcinoma development both in vitro and in vivo. PIN1 inhibitor API-1 directly and specifically binds to the Pin1 peptidyl-prolyl isomerase domain, effectively inhibiting Pin1 cis-trans isomerizing activity.

1. Pseudoprotodioscin has moderate cytotoxicity.

Aurintricarboxylic acid (NSC-4056) is a strong inhibitor of topoisomerases and other nucleases. It is a potent inhibitor of ribonuclease and topoisomerase II by preventing the binding of the nucleic acid to the enzyme.