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I-BET151

CAS No. : 1300031-49-5

MCE 国际站：I-BET151

产品活性：I-BET151 (GSK1210151A) 是一种 BET 溴结构域 (BET bromodomain) 抑制剂，抑制 BRD4，BRD2 和 BRD3 的 pIC₅₀ 分别为 6.1，6.3 和 6.6。

研究领域：Epigenetics

作用靶点：Epigenetic Reader Domain

In Vitro: I-BET151 (1 μM; 72 hours) treatment displays the majority of live cells resided in the G₀ phase and commensurate with a dose- and time-dependent decrease in cell proliferation and abrogation of bromodeoxyuridine incorporation.
?I-BET151 (100 nM; 72 hours) causes a significant dose- and time-dependent decrease in the proportion of myeloma cells in S/G₂ phase.

In Vivo: I-BET151 demonstrates low blood clearance in the rat (~20% liver blood flow) and good oral systemic exposure which resulted in good oral bioavailability. High clearance is observed in the dog (~95% liver blood flow). The systemic exposure in the dog is low, resulting in a poor oral bioavailability of 16%. The high blood clearance in dog correlates well with the high intrinsic clearance observed in dog microsomes and hepatocytes, whereas the low intrinsic clearances seen in rat and mouse (mouse IVC 1.6 mL/min/g; CLb 8 mL/min/kg) correlate with lower in vivo blood clearances in these species. Due to the low systemic exposure observed in the dog, I-BET151 is investigated in the mini-pig as a potential second species for toxicological evaluation where it showed low clearance (~32% liver blood flow) and good bioavailability (65%).
?I-BET151 (30 mg/kg; i.p.; daily for 21 days)-treats mice has four- to five fold smaller myeloma tumors and a significantly reduces rate of tumor size doubling than vehicle-treated mice.

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