ch5132799 is an inhibitor of class i phosphatidylinositol 3-kinase (pi3k) with ic50 value of 14nm against pi3kα [1].ch5132799 shows inhibitory effect on class i pi3k with ic50 values of 0.014μm, 0.12μm, 0.5μm and 0.036μm against pi3kα, pi3kβ, pi3kδ and pi3kγ, respectively. pi3kα is especially sensitive to ch5132799. ch5132799 is a selective inhibitor. it shows less effect on class ii pi3ks, class iii pi3k and mtor. for other 26 protein kinases, ch5132799 nearly has no inhibition with ic50 value of > 10μm. ch5132799 is found to have potent antitumor activity. it exerts ic50 values of 0.2μm, 0.032μm, 0.056μm and 0.12μm in hct116, kpl-4, t-47d and sk-ov-3 cell lines, respectively. moreover, ch5132799 is oral available in animal models. treatment of ch5132799 shows strong tumor regression at dose of 12.5 mg/kg in mice bearing human breast cancer xenografts [1].
[1] ohwada j, ebiike h, kawada h, et al. discovery and biological activity of a novel class i pi3k inhibitor, ch5132799. bioorganic & medicinal chemistry letters, 2011, 21(6): 1767-1772.
