生物活性 | |||
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描述 | Activation of the PI3K (phosphoinositide 3-kinase) pathway is a frequent occurrence in human tumors and is thought to promote growth, survival, and resistance to diverse therapies. Voxtalisib (XL765) is a potent and highly selective pan inhibitor of class I PI3Ks (α, β, γ, and δ) with activity against mTOR. In cellular assays, XL765 inhibits the formation of PIP3 in the membrane, and inhibits phosphorylation of AKT, p70S6K, and S6 phosphorylation in multiple tumor cell lines with different genetic alterations affecting the PI3K pathway. XL765 displayed potent inhibitory activity against class I PI3K isoforms p110α, p110β, p110δ, and p120γ, with IC50 values of 39, 110, 43, and 9 nM, respectively, IC50 values of 160 and 910 nM for mTORC1 and mTORC2, respectively. In a vitro study, XL765 inhibits colony growth with an IC50 value of 270 nM in PC-3 cells and 230 nM in MCF7 cells. Oral administration of XL765 (10, 30, 100, or 300 mg/kg) caused a dose-dependent decrease of phosphorylation of AKT, p70S6K, and S6 in the tumors on melanoma xenograft mice, reaching a maximum of 84% inhibition of S6 phosphorylation at 30 mg/kg at 4h[3]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
3.70mL 0.74mL 0.37mL |
18.50mL 3.70mL 1.85mL |
37.00mL 7.40mL 3.70mL |
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