Brequinar(布喹那)是一种合成的喹啉羧酸类似物,也是有效的二氢乳清酸脱氢酶(DHODH)抑制剂,对人 的 IC50 值为 5.2 nM,可以通过抑制DHODH,从而阻断嘧啶的从头合成。此外,Brequinar还可诱导肿瘤的铁死亡(Ferroptosis),具有抗肿瘤和抗病毒活性。
体外研究:Brequinar将病毒后代产量减少> 90%,EC50为17 nM。 Brequinar(5μM)也抑制其他正痘病毒,并阻断病毒DNA复制。 Brequinar不影响病毒早期基因表达,但对病毒周期的晚期有严重影响。 Brequinar以剂量依赖性方式降低包膜蛋白产生水平和病毒滴度,在CFI测定中EC50为78 nM。 Brequinar(5μM)抑制病毒RNA合成。 Brequinar具有抗病毒作用,但效果被嘧啶逆转。 Brequinar抗性病毒可以在细胞培养中选择。 Brequinar(5μM)抑制来自WT和NS5突变体复制子的萤光素酶活性。 Brequinar钠有效地阻止了PyNTP水平的增加,IC50为0.26μM。 Brequinar钠有效抑制细胞增殖,IC50为0.26μM。 Brequinar钠抑制p56lck的自身磷酸化,IC50为70μM;对于25,50和100μMBrequinar钠,抑制分别为39,41和60%。 Brequinar钠还抑制外源底物组蛋白2B的p56lck的磷酸化,IC50为70μM;对于25,50,100和200μMBrequinar钠,抑制分别为10,43,59和86%。 Brequinar钠抑制p59fyn的自磷酸化,IC50为105μM;对于25,50,100和200μMBrequinar钠,抑制分别为0,17,48和65%。 Brequinar钠还抑制组蛋白2B的p59fyn的磷酸化,IC50为20μM;对于10,25,50,100和200μMBrequinar钠,抑制分别为26,54,79,83和84%。
体内研究:与未处理的BALB / c小鼠相比,Brequinar钠处理(10-20mg / kg /天)小鼠的填充细胞体积百分比减少31%。 Brequinar钠分别将骨髓细胞中的UTP和CTP水平分别降低30%和25%。 Brequinar钠(10-20mg / kg /天)联合尿苷(1000-2000mg / kg /天)预防贫血,并且血细胞比容保持在与未治疗对照相当的水平(61-63%)。
体外实验* | |
---|---|
细胞系 | BSC-40 cells |
方法 | BSC-40 cells are seeded in 96-well plates in the presence of concentrations of Brequinar ranging from 0.01 μM to 75 μM for 24 h. Control cells are incubated with 0.1% DMSO. Neutral red is methanol/acetic acid-extracted from cells and is quantitated at an absorbance of 490 nm (A490). All measurements expressed the average of four independent assays. |
浓度 | 0.01 μM to 75 μM |
处理时间 | 24 h |
*上述方法来自公开文献,仅供相同目的实验参考。如实验目的、材料、方法不同,请参考其他文献。
体内实验* | |
---|---|
动物模型 | Mice |
配制 | 0.9% NaCl |
剂量 | 100mg/kg |
给药处理 | i.p. |
*上述方法来自公开文献,仅供相同目的实验参考。如实验目的、材料、方法不同,请参考其他文献。
化学性质
分子量 | 375.37 |
分子式 | C23H15F2NO2 |
CAS号 | 96187-53-0 |
溶解性(25°C) | DMSO 25 mg/mL |
储存条件 | 粉末型式 -20°C 3年;4°C 2年 溶于溶剂 -80°C 6个月;-20°C 1个月 |
运输方式 | 冰袋运输,根据产品的不同,可能会有相应调整。 |
储备液配制
*下述溶液配置方法仅为基于分子量计算出的理论值。不同产品在配置溶液前,需考虑其在不同溶剂中的溶解度限制。
Concentration / Solvent Volume / Mass | 1 mg | 5 mg | 10 mg |
---|---|---|---|
1 mM | 2.664 mL | 13.3202 mL | 26.6404 mL |
5 mM | 0.5328 mL | 2.664 mL | 5.3281 mL |
10 mM | 0.2664 mL | 1.332 mL | 2.664 mL |
Kinase Assay | Immunoprecipitated p59fyn or p56lck from CTLL-4 cells or LSTRA cells (5×106) is preincubated with various concentrations of BQR in the PTK buffer (50 mM HEPES (pH 7.4), 10 mM MgCl2, and 10 mM MnCl2) on ice for 10 min. Exogenous substrate, histone 2B (2 μg), is added and, after 10 min, the reaction is initiated by addition of 10 μCi [γ-32P]ATP. After incubation at 20°C for 10 min, the reaction mixture is subjected to electrophoresis in a 12.5% SDS-polyacrylamide gel. Phosphorylation of the kinase and the exogenous substrate is analyzed by autoradiography. |
---|
Cell Assay | The neutral-red uptake assay is used to evaluate cell viability. BSC-40 cells are seeded in 96-well plates in the presence of concentrations of Brequinar ranging from 0.01 μM to 75 μM for 24 h. Control cells are incubated with 0.1% DMSO. Neutral red is methanol/acetic acid-extracted from cells and is quantitated at an absorbance of 490 nm (A490). All measurements expressed the average of four independent assays. |
---|
Animal Administration | Brequinar is administered once daily by i.p. injection, while uridine is administered twice daily. Mice are bled through the orbital vein using a microhematocrit capillary tube, and the blood is centrifuged for 10 min at 550 × g. The percentage of packed cell volumes is determined with a microhematocrit capillary tube reader. All mice are killed 4 h after receiving their last dose of Brequinar or uridine. |
---|
https://www.abmole.cn/products/brequinar.html
参考文献
[1] He T, et al. Oncogene. Inhibition of the mitochondrial pyrimidine biosynthesis enzyme dihydroorotate dehydrogenase by doxorubicin and brequinar sensitizes cancer cells to TRAIL-induced apoptosis.
[2] Schnellrath LC, et al. Int J Antimicrob Agents. Potent antiviral activity of brequinar against the emerging Cantagalo virus in cell culture.
关键词:Brequinar, DUP785; Biphenquinate; BPQ;NSC 368390, Brequinar供应商AbMole, DHODH抑制剂, 购买Brequinar, Brequinar溶解度, Brequinar结构式