Beta-Lapachone
mRNA synthesis
In vitro transcription of capped mRNA with modified nucleotides and Poly(A) tail
Tyramide Signal Amplification (TSA)
TSA (Tyramide Signal Amplification), used for signal amplification of ISH, IHC and IC etc.
Phos Binding Reagent Acrylamide
Separation of phosphorylated and non-phosphorylated proteins without phospho-specific antibody
Cell Counting Kit-8 (CCK-8)
A convenient and sensitive way for cell proliferation assay and cytotoxicity assay
SYBR Safe DNA Gel Stain
Safe and sensitive stain for visualization of DNA or RNA in agarose or acrylamide gels.
Inhibitor Cocktails
Protect the integrity of proteins from multiple proteases and phosphatases for different applications.
Beta-Lapachone是一种DNA拓扑异构酶I抑制剂[1].
在DNA解旋试验中,beta-Lapachone被发现可抑制DNA拓扑异构酶I的活性.在浓度为1 μM时抑制松弛.用beta-Lapachone在37°C预处理拓扑异构酶I 5分钟可以增加beta-Lapachone的效力.Beta-Lapachone对拓扑异构酶I有选择性,对拓扑异构酶II没有显示出抑制活性.此外,beta-Lapachone也被证明对拓扑异构酶I介导的DNA裂解没有诱导作用[1].
Beta-Lapachone对人癌细胞具有广泛的抗肿瘤活性.它诱导AD2780s\HT-29\DLD\G480和MCF-7的细胞死亡,IC50值分别为2 μM\5 μM\5 μM\4 μM和2 μM.研究发现,beta-Lapachone通过释放细胞色素C,诱导细胞凋亡和细胞坏死.也报道beta-Lapachone影响细胞周期.Beta-Lapachone在SW480细胞中主要诱引起S期阻滞,在SW620细胞中导致S晚期和G2/M期阻滞,在DLD1细胞中导致S早期阻滞[2,3].
参考文献:
[1] Li CJ, Averboukh L, Pardee AB. beta-Lapachone, a novel DNA topoisomerase I inhibitor with a mode of action different from camptothecin. J Biol Chem. 1993 Oct 25;268(30):22463-8.
[2] Li YZ, Li CJ, Pinto AV, Pardee AB. Release of mitochondrial cytochrome C in both apoptosis and necrosis induced by beta-lapachone in human carcinoma cells. Mol Med. 1999 Apr;5(4):232-9.
[3] Huang L, Pardee AB. beta-lapachone induces cell cycle arrest and apoptosis in human colon cancer cells. Mol Med. 1999 Nov;5(11):711-20.
Physical Appearance | A solid |
Storage | Store at -20°C |
M.Wt | 242.27 |
Cas No. | 4707-32-8 |
Formula | C15H14O3 |
Solubility | insoluble in H2O; ≥10.85 mg/mL in DMSO; ≥4.32 mg/mL in EtOH |
Chemical Name | 2,2-dimethyl-3,4-dihydrobenzo[h]chromene-5,6-dione |
SDF | Download SDF |
Canonical SMILES | CC1(CCC2=C(O1)C3=CC=CC=C3C(=O)C2=O)C |
运输条件 | 蓝冰运输或根据您的需求运输。 |
一般建议 | 不同厂家不同批次产品溶解度各有差异,仅做参考。若实验所需浓度过大至产品溶解极限,请添加助溶剂助溶或自行调整浓度。溶液形式一般不宜长期储存,请尽快用完。 |
细胞实验 [1]: | |
细胞系 |
HL-60、PC-3、DU145和LNCaP细胞 |
制备方法 |
在DMSO中的溶解度大于10.85 mg/mL。若配制更高浓度的溶液,一般步骤如下:请将试管置于37 °C加热10分钟和/或将其置于超声波浴中震荡一段时间。原液于-20 °C可放置数月。 |
反应条件 |
0.005 ~ 50 μM;12小时 |
实验结果 |
在HL-60、PC-3、DU145和LNCaP细胞中,1 ~ 5 μM Beta-Lapachone使细胞停滞于细胞周期的G0/G1期。此外,在DNA合成早期或之前,Beta-Lapachone呈p53非依赖性地诱导细胞凋亡。Beta-Lapachone将Topo I锁定到DNA上并阻止复制叉运动,从而诱导细胞凋亡。 |
动物实验 [2]: | |
动物模型 |
携带人卵巢癌36M2细胞的裸小鼠 |
给药剂量 |
25 ~ 50 mg/kg;腹腔注射 |
实验结果 |
在携带人卵巢癌36M2细胞的裸小鼠中,Beta-Lapachone (50 mg/kg) 有效抑制肿瘤生长。Beta-Lapachone和Taxol联合用药协同诱导细胞凋亡。此外,联合用药没有引起体重减轻。于尸检时,也未观察到显著畸形的内脏器官。 |
注意事项 |
请于室内测试所有化合物的溶解度。虽然化合物的实际溶解度可能与其理论值略有不同,但仍处于实验系统误差的允许范围内。 |
References: [1]. Planchon SM, Wuerzberger S, Frydman B, Witiak DT, Hutson P, Church DR, Wilding G, Boothman DA. Beta-lapachone-mediated apoptosis in human promyelocytic leukemia (HL-60) and human prostate cancer cells: a p53-independent response. Cancer Res. 1995 Sep 1;55(17):3706-11. [2]. Li CJ, Li YZ, Pinto AV, Pardee AB. Potent inhibition of tumor survival in vivo by beta-lapachone plus taxol: combining drugs imposes different artificial checkpoints. Proc Natl Acad Sci U S A. 1999 Nov 9;96(23):13369-74. |
Description | Beta-Lapachone是一种选择性DNA拓扑异构酶I抑制剂 | |||||
靶点 | IDO1 | Topo I | ||||
IC50 | 0.44 μM |
质量控制和MSDS
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