Pixantrone (BBR 2778) dimaleate 是一种拓扑异构酶 II (topoisomerase II) 的抑制剂和 DNA 嵌入剂,具有抗肿瘤活性。
生物活性 | Pixantrone (BBR 2778) dimaleate is atopoisomeraseIIinhibitor and DNA intercalator, with anti-tumor activity. |
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体外研究 (In Vitro) | Pixantrone (0-10 μM, 72 h) dimaleate induces cell death in multiple cancer cell lines independent of cell cycle perturbation, with IC50s of 37.3 nM, 126 nM and 136 nM for T47D, MCF-10A and OVCAR5 cells, respectively[1]. Pixantrone (25-500 nM, 2 4 h) dimaleate induces DNA damage at high concentration of 500 nM and induces severe chromosomal aberrations and mitotic catastrophe in PANC1 cells[1]. Pixantrone (100 nM, 24 h) dimaleate may disrupt chromosome segregation because of generating merotelic kinetochore attachments that cause chromosome non-disjunction[1]. Pixantrone (0-100 μM, 72 h) dimaleate potently inhibits growth of human leukemia K562 cells, etoposide-resistant K/VP.5 cells, MDCK and ABCB1-transfected MDCK/MDR cells with IC50s of 0.10 μM, 0.56 μM, 0.058 μM and 4.5 μM, respectively[2]. Pixantrone (0.01-0.2 μM) dimaleate leads to a concentration-dependent formation of linear DNA through acting on topoisomerase Iiα and produces semiquinone free radicals in an enzymatic reducing system, although not in a cellular system, most likely due to low cellular uptake[2]. Pixantrone (0.01-10 μM) dimaleate shows potent inhibitory activities against rat 97-116 peptide-specific T cell proliferation[4].
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体内研究 (In Vivo) | Pixantrone (i.v., 27 mg/kg, every 7 days, three times) dimaleate does not worsen pre-existing moderate degenerative cardiomyopathy, causes minimal cardiotoxic in mice following repeated treatment cycles and results in less mortality than mitoxantrone in doxorubicin-pretreated mice[3]. Pixantrone (i.v., 16.25 mg/kg, every week, three times) dimaleate modulates Lymph node cells (LNC) responses, affacts T cell subpopulations in TAChR-immunized Lewis rats and also shows preventive and therapeutic effect in experimental autoimmune myasthenia gravis (EAMG) rats[4].
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运输条件 | Room temperature in continental US; may vary elsewhere. |
储存方式 | 4°C, sealed storage, away from moisture *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture) |
溶解性数据 | In Vitro: DMSO : 33.33 mg/mL(59.78 mM;Need ultrasonic) H2O : 5 mg/mL(8.97 mM;ultrasonic and warming and heat to 80℃) 配制储备液 1 mM | 1.7937 mL | 8.9684 mL | 17.9369 mL | 5 mM | 0.3587 mL | 1.7937 mL | 3.5874 mL | 10 mM | 0.1794 mL | 0.8968 mL | 1.7937 mL |
*请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液;一旦配成溶液,请分装保存,避免反复冻融造成的产品失效。 储备液的保存方式和期限:-80℃, 6 months; -20℃, 1 month (sealed storage, away from moisture)。-80℃ 储存时,请在 6 个月内使用,-20℃ 储存时,请在 1 个月内使用。 In Vivo: 请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照In Vitro方式配制澄清的储备液,再依次添加助溶剂: ——为保证实验结果的可靠性,澄清的储备液可以根据储存条件,适当保存;体内实验的工作液,建议您现用现配,当天使用;
以下溶剂前显示的百 分比是指该溶剂在您配制终溶液中的体积占比;如在配制过程中出现沉淀、析出现象,可以通过加热和/或超声的方式助溶 1. 请依序添加每种溶剂: PBS Solubility: 50 mg/mL (89.68 mM); Clear solution; Need ultrasonic 2. 请依序添加每种溶剂: 10% DMSO 40%PEG300 5%Tween-80 45% saline Solubility: ≥ 0.83 mg/mL (1.49 mM); Clear solution
此方案可获得 ≥ 0.83 mg/mL (1.49 mM,饱和度未知) 的澄清溶液。 以 1 mL 工作液为例,取 100 μL 8.3 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中,混合均匀;向上述体系中加入50 μL Tween-80,混合均匀;然后继续加入 450 μL生理盐水定容至 1 mL。 3. 请依序添加每种溶剂: 10% DMSO 90% (20%SBE-β-CDin saline) Solubility: ≥ 0.83 mg/mL (1.49 mM); Clear solution
此方案可获得 ≥ 0.83 mg/mL (1.49 mM,饱和度未知) 的澄清溶液。 以 1 mL 工作液为例,取 100 μL 8.3 mg/mL 的澄清 DMSO 储备液加到 900 μL20% 的 SBE-β-CD 生理盐水水溶液中,混合均匀。 *以上所有助溶剂都可在本网站选购。
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