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描述 | BMK1 (Big MAP Kinase 1) is a member of the MAP kinase family. MAP kinases act as an integration point for multiple biochemical signals, and are involved in a wide variety of cellular processes such as proliferation, differentiation, transcription regulation and development. BMK1 is specifically activated by mitogen-activated protein kinase kinase 5 (MAP2K5/MEK5). It is involved in the downstream signaling processes of various receptor molecules including receptor type kinases, and G protein-coupled receptors. In response to extracelluar signals, this kinase translocates to cell nucleus, where it regulates gene expression by phosphorylating, and activating different transcription factors[3]. XMD8-92 is a BMK1 inhibitor. The dissociation constant (Kd) of XMD8-92 towards BMK1 was 80 nM, and data of XMD8-92 against other kinases suggested selectivity of XMD8-92 to BMK1. In a kinase activity assay utilizing Hela cell lysates, the IC50 of XMD8-92 against BMK1 was 1.5 μM. Furthermore, growth factor-induced activation of cellular BMK1 was effectively blocked by 1 μM XMD8-92, detected by mobility retardation. Cell proliferation assay revealed that 5 μM XMD8-92 inhibited more than 50% PC3, Hela and LL/2 cell growth when incubated for 48h[4]. 48h treatment of 25 μM XMD8-92 also inhibited cell proliferation of pancreatic tumor AsPC-1cells to the extent of more than 50%[5]. In animal experiments, treatment of mice bearing Hela or LL/2 xenografts with XMD8-92 at the dose of 50 mg/kg twice daily 1 day, several days, or weeks after inoculation of the tumor cells all significantly inhibit the growth of the tumors[4]. In an AsPC-1 xenograft model established in NOD/SCID mice, XMD8-92 administrated at the dose of 50 mg/kg i.p. daily for 15 days significantly inhibited tumor growth[5]. | ||
作用机制 | XMD8-92 inhibits BMK1 via ATP site competition-binding. The selective binding and inhibition of XMD8-92 towards BMK1 was revealed by ATP-site competition binding assay and KiNativ method utilizing Hela cell lysates[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 HeLa cells | Function assay | Inhibition of EGF-induced BMK1 autophosphorylation in human HeLa cells by SDS-PAGE analysis, IC50=0.24 μM | 21412406 |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.11mL 0.42mL 0.21mL |
10.54mL 2.11mL 1.05mL |
21.07mL 4.21mL 2.11mL |
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