生物活性 | |||
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描述 | Casein kinase 1 ε (CK1ε) and casein kinase 1 δ (CK1δ) are closely related Ser-Thr protein kinases that serve as key clock regulators as demonstrated by mammalian mutations in each that dramatically alter the circadian period. PF-4800567 is a novel and potent inhibitor of CK1ε (IC50 = 32 nM) with greater than 20-fold selectivity over CK1δ (IC50 = 711 nM). PF-4800567 effectively blocked nuclear translocation mediated by CK1ε down to 0.01 μM. Further, PF-4800567 could completely block the enhanced PER2 degradation. These data show that each of the modulatory roles that CK1ε has on the PER proteins can be potently inhibited by PF-4800567. In addition, PF-4800567 had minor effect on the circadian clock at concentrations up to 30 nM. In C57BL/6J mice, PF-4800567 (100 mg/kg, s.c.) was rapidly absorpted and distributed in plasma and brain of mice. The brain-to-plasma ratios was constant throughout the 24-h time course with an average value of 2.1. F-4800567 (100 mg/kg; dosed daily for 3days) delayed the active period by 0.5 h[1]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.78mL 0.56mL 0.28mL |
13.90mL 2.78mL 1.39mL |
27.79mL 5.56mL 2.78mL |
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