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3-AP

CAS No. : 143621-35-6

MCE 站：3-AP

产品活性：3-AP (PAN-811) 是一种核糖核苷酸还原酶 (ribonucleotide reductase，RR) 的 M2 亚基抑制剂，是有效的放射致敏剂。

研究领域：Cell Cycle/DNA Damage

作用靶点：DNA/RNA Synthesis

In Vitro: 3-AP (Triapine) is a potent derivative of α-heterocyclic carboxaldehyde thiosemicarbazone (HCT) that inhibits hRRM2 and p53R2 isoforms of the M2 subunit. 3-AP (Triapine) is thought to inhibit ribonucleotide reductase through its preformed iron chelate, rather than directly by removing iron from the active site. In cells containing less topoisomerase IIα fewer DNA strand breaks will be produced, and thus topoisomerase II poisons will be less inhibitory in the K/VP.5 cell line. The IC₅₀s for Dp44mT growth inhibition are 48±9 nM and 60±12 nM, for K562 and K/VP.5 cells, respectively. The IC₅₀s for 3-AP growth inhibition are 476±39 nM and 661±69 nM for K562 and K/VP.5 cells, respectively. PKIH and DpT Fe chelators show high antiproliferative activity against a range of tumor cell lines. Dp44mT shows the greatest antitumor efficacy with an IC₅₀ that ranged from 0.005 to 0.4 μM. The average IC₅₀ of Dp44mT over 28 cell types is 0.03±0.01 μM, which is significantly lower than that of 3-AP (Triapine; average IC₅₀: 1.41±0.37 μM).

In Vivo: 3-AP (Triapine) causes a significant increase (1.7-fold) in splenic weight when expressed as a percentage of total body weight (1.02±0.06%; n=25) compared with control mice (0.6±0.03%; n=27). In the long-term group, a significant increase in heart weight is observed after Dp44mT (0.4 mg/kg per day) (0.8±0.06%; n=4) compared with control mice (0.5±0.01%; n=6). A significant decrease in the expression of Ndrg1, TfR1, and VEGF1 in the liver is noted for Dp44mT- and 3-AP (12 mg/kg per day)-treated animals. The decreased expression could be related to the increased liver Fe in both Dp44mT- and 3-AP-treated mice.

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