TGX-221, an effective, specific, and cell membrane permeable inhibitor of the PI3K p110β catalytic subunit, is utilized for cancer treatment.

p110δ:0.1 μM, p110β:5 nM

在小鼠模型中,TGX-221能够改善血流量,增加尾出血和肾出血时间.

在J774.2巨噬细胞中,TGX-221能够抑制胰岛素诱导的PKB的Ser473的磷酸化。在体外循环（ECC）模型中, TGX-221抑制血小板-ECC相互作用,血小板聚集和血小板 - 粒细胞结合。在PC3细胞中,TGX-221（0.2-20 μM）能够抑制细胞增殖,降低p110βPI3K亚型的活性。

Lipid kinase activity : IC50 values are measured using a standard lipid kinase activity with PI as a substrate. (i)100 μM cold ATP is used instead of 10 μM, (ii) the DMSO concentration is 1%, and (iii) [γ-33P]ATP is used instead of [γ-32P]ATP. The TLC plates are quantified using a phosphorimager screen. The reported IC50 values are determined by non-linear regression analysis on the basis of at least three independent experiments repeated across multiple preparations of recombinant protein.

For measurement of proliferation, cells are seeded in triplicate in 96-well culture plates and incubated overnight to allow cell attachment. The cells are incubated with TGX-221 for 24, 48, and 72 hours. At designated time intervals, cells are quantified by a crystal violet staining-based colorimetric assay. Briefly, cells are fixed by addition of 100 μl of 2.5% glutaraldehyde solution and incubated at room temperature for 30 minutes. Plates are washed three times by submersion in PBS solution. Plates are air-dried and stained by addition of 100 μL of 0.1% solution of crystal violet dissolved in deionized water and incubated for 20 minutes at room temperature, excess dye is removed by extensive washing with deionized water, and plates are air-dried prior to bound dye solubilization in 100 μL of 10% acetic acid. The optical density of dye extracts is measured directly in plates using a microplate reader at 570 nm.(Only for Reference)