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描述 | WP1130 is a partly selective DUB inhibitor, directly inhibiting DUB activity of USP9x, USP5, USP14, and UCH37, which are known to regulate survival protein stability and 26S proteasome function. WP1130 at 5μM induced rapid accumulation of polyubiquitinated (K48/K63-linked) proteins into juxtanuclear aggresomes, without affecting 20S proteasome activity. WP1130-mediated inhibition of tumor-activated DUBs resulted in downregulation of antiapoptotic and upregulation of proapoptotic proteins, such as MCL-1 and p53, in BV173 cells treated by 5μM WP1130 for 4h[3]. WP1130 at 5μM specifically and rapidly down-regulatef both wild-type and mutant Bcr/Abl protein without affecting bcr/abl gene expression in chronic myelogenous leukemia (CML) cells, not requiring the participation of the proteasomal pathway. And this loss of Bcr/Abl protein correlated with the onset of apoptosis and reduced phosphorylation of Bcr/Abl substrates, including p-Stat5 and p-Hck. It was more effective in reducing leukemic versus normal hematopoietic colony formation and strongly inhibited colony formation of cells derived from patients with T315I mutant Bcr/Abl–expressing CML in blast crisis. WP1130 suppressed the growth of K562 heterotransplanted tumors of mice treated with WP1130 at 30mg/kg, i.p., every other day for 9 days[4]. |
细胞研究 | |||||
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细胞系 | 浓度 | 检测类型 | 检测时间 | 活动说明 | 数据源 |
human A375 cells | Cytotoxicity assay | 72 h | Cytotoxicity against human A375 cells after 72 hrs by MTT assay, IC50=1.7 μM | 24457091 | |
human K562 cells | Cytotoxicity assay | 72 h | Cytotoxicity against human K562 cells after 72 hrs by MTT assay, IC50=2.4 μM | 24457091 | |
human Mino cells | Cytotoxicity assay | 72 h | Cytotoxicity against human Mino cells after 72 hrs by MTT assay, IC50=0.8 μM | 24457091 |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.60mL 0.52mL 0.26mL |
13.01mL 2.60mL 1.30mL |
26.02mL 5.20mL 2.60mL |
参考文献 |
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