生物活性 | |||
---|---|---|---|
靶点 |
|
||
描述 | PI3Ks are divided into three classes (I, II, and III) based on substrate specificity, sequence homology, and types of regulatory subunits. Class I PI3Ks are further divided into Class IA and Class IB. Class IB of PI3Ks containing the only member, PI3Kγ, is activated primarily by G-protein coupled receptors. The PI3Kγ isoform is mainly expressed in immune cells. Preclinical studies suggest that PI3Kγ inhibition in tumor-associated myeloid cells may be effective to prevent tumor growth. IPI-549 is a potent inhibitor of PI3Kγ (IC50 = 16 nM, measured by Promega ADP-Glo Max assay kit) with >100-fold selectivity over other lipid and protein kinases. IPI-549 shows excellent PI3Kγ potency (IC50 = 1.2 nM) and selectivity against other Class I PI3K isoforms (>146-fold) measured by cellular phospho-AKT inhibition assays in SKOV-3, 786-O, RAW 264.7, and RAJI cells. Also, IPI-549 inhibited PI3Kγ-dependent BMDM migration in a dose-dependent manner in vitro. 0.1 - 3 mg/kg oral treatment of IPI-549 significantly reduced neutrophil migration in a dose-dependent manner while a significant inhibition of PI3Kγ can be observed in the mouse air pouch model. IPI-549 is currently in Phase 1 clinical evaluation of advanced solid tumors[1]. |
实验方案 | |||
---|---|---|---|
1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
1.89mL 0.38mL 0.19mL |
9.46mL 1.89mL 0.95mL |
18.92mL 3.78mL 1.89mL |
参考文献 |
---|