OSU-03012 (AR-12) is an inhibitor of 3-phosphoinositide-dependent kinase-1 (PDK-1) with IC50 value of 5μm, which shows 2-fold higher potency over OSU-02067 [1].
OSU-03012 has represented to suppress PC-3 cell proliferation and induce apoptosis in PC-3 cells. Expression of the constitutively active forms of PDK-1 and Akt has revealed to reduce OSU-03012-induced apoptosis in PC-3 cell [1].
OSU-03012 could potently inhibit the growth of primary human VS cells and malignant schwannoma HMS-97 cells in a dose-dependent manner. In contrast, normal human Schwann cells showed to be more resistant to OSU-03012. Additionally, OSU-03012 revealed to inhibit phosphorylation of AKT at the threonine-308 site in both VS cells and HMS-97 cells [2].
References:
[1] Zhu J1, Huang JW, Tseng PH, Yang YT, Fowble J, Shiau CW, Shaw YJ, Kulp SK, Chen CS. From the cyclooxygenase-2 inhibitor celecoxib to a novel class of 3-phosphoinositide-dependent protein kinase-1 inhibitors. Cancer Res. 2004 Jun 15;64(12):4309-18.
[2] Lee TX1, Packer MD, Huang J, Akhmametyeva EM, Kulp SK, Chen CS, Giovannini M, Jacob A, Welling DB, Chang LS. Growth inhibitory and anti-tumour activities of OSU-03012, a novel PDK-1 inhibitor, on vestibular schwannoma and malignant schwannoma cells. Eur J Cancer. 2009 Jun;45(9):1709-20.