名称 | KW-2478 |
描述 | KW-2478 is a non-ansamycin HSP90 inhibitor with IC50 of 3.8 nM. |
细胞实验 | To measure the IC50, OPM-2/green fluorescent protein (GFP) cells, KMS-11 cells, OPM-2/GFP and other cells are plated into 96-well plates and treat with KW-2478. After 72 hours of cultivation, cell viability is determined using Cell Proliferation Reagent WST-1. WST reagent is added to the wells, followed by incubation for 4 hours at 37 °C. After that, the absorbance at 450 nm with reference at 650 nm is measured with a microplate spectrophotometer. To examine time dependency of antiproliferative activity of KW-2478, the cells are plated into 96-well V-bottomed plates and treated with KW-2478. After 0 hour and at intervals from 3 to 72 hours at 37 °C, the supernatant is aspirated. After drug-free medium is added to the wells, the supernatant is aspirated again. Finally, drug-free medium is added to the wells, and the plates are further incubated for the remainder of the 72-hour period, followed by measurement of cell viabil(Only for Reference) |
激酶实验 | Hsp90 Binding Assay: Human Hsp90α solution (0.5 μg/mL) is fixed on 96-well plates, followed by blocking with TBS containing 1% bovine serum albumin. KW-2478 solutions is added to the wells, and bRD is added to a concentration of 0.1 μmol/L. After removal of solution, poly-HRP streptavidin solution dilutes with poly-HRP dilution buffer is added to the wells. After removal of solution, equal volumes of TMB peroxidase substrate and peroxidase solution B are added to the wells. To stop the HRP reaction, 2 mol/L H2SO4 are added, followed by measurement of absorbance at 450 nm using a microplate spectrophotometer. |
体外活性 | KW-2478 通过IC50为3.8 nM来抑制bRD与Hsp90α的结合。该化合物能降解Hsp90的客体蛋白,包括FGFR3、IGF-1Rβ和c-Raf-1。KW-2478减少磷酸化Erk1/2的水平,并通过PARP的裂解触发U266细胞中的凋亡,PARP是caspase-3的底物。KW-2478抑制细胞增殖活动存在时间依赖性,连续暴露至少12小时是必要的以发挥强大的抗肿瘤活性。KW-2478降低IgH位点的易位产物,并主要通过抑制Cdk9的功能来抑制c-Maf和cyclin D1基因的转录。文献[1]显示,KW-2478对各种细胞系具有强大且广泛的生长抑制活性,对B细胞性淋巴瘤、套细胞淋巴瘤和多发性骨髓瘤细胞系的癌细胞生长抑制,EC50分别为101-252 nM、81.4-91.4 nM和120-622 nM。KW-2478还对原发性CLL和NHL细胞显示出强大的生长抑制活性,EC50分别为40-170 nM和200-400 nM。文献[2]。 |
体内活性 | KW-2478在剂量达到或超过100 mg/kg时,通过诱导肿瘤中客体蛋白的降解,抑制NCI-H929 s.c.接种模型中的肿瘤生长。同样剂量下,KW-2478亦能降低OPM-2/GFP i.v.接种小鼠模型中的血清M蛋白水平和骨髓中的多发性骨髓瘤(MM)肿瘤负荷。[1] |
存储条件 | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
溶解度 | DMSO : 106 mg/mL (184.5 mM) Ethanol : 3 mg/mL (5.22 mM) H2O : < 1 mg/mL (insoluble or slightly soluble)
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关键字 | inhibit | Heat shock proteins | KW-2478 | KW 2478 | Inhibitor | HSP |
相关产品 | SNX2112 | Teprenone | SNX0723 | Gedunin | Tamoxifen Citrate | Rifabutin | Paeoniflorin | Tamoxifen | Ethoxyquin | Ganetespib | DN401 | KRIBB11 |
相关库 | 抑制剂库 | 抗癌活性化合物库 | 经典已知活性库 | 抗癌化合物库 | 已知活性化合物库 | 细胞骨架化合物库 | 药物功能重定位化合物库 | 抗代谢疾病化合物库 | 抗癌临床化合物库 | 抗癌药物库 |