Brief Description

PKI-402 is a potent dual pan-PI3K/mTOR inhibitor targeting PI3Kα/β/γ/δ and mTOR with IC50 of 2 nM/7 nM/16 nM/14 nM and 3 nM, respectively; also potent to PI3Kα mutants E545K and H1047R.
IC50 value: 2 nM/7 nM/16 nM/14 nM(PI3Kα/β/γ/δ); 3 nM (mTOR) [1]
Target: pan-PI3K/mTOR
in vitro: PKI-402 inhibits E545K and H1047R PI3Kα mutants with IC50 of 3 nM. In a panel of 236 human protein kinases, PKI-402 only displays inhibitory activity against C-Raf and B-Raf with IC50 of 7 μM, and displays little activity against all other kinases with IC50 of > 10 μM. PKI-402 inhibits the growth of human tumor cell lines with IC50 of 6-349 nM. Consistently, PKI-402 inhibits phosphorylation of PI3K and mTOR effector proteins, particularly phosphorylated Akt (p-Akt) at T308 and S473 with IC50 of <10 nM and <30 nM, respectively. PKI-402 inhibits both p70S6K and 4EBP1 phosphorylation with IC50 of <10 nM. PKI-402 inhibits Akt phosphorylation of PRAS40 at T246 with IC50 of <30 nM, and inhibits Akt phosphorylation of ENOS at S1177 and GSK3α/GSK3β at S9/S21 with IC50 of <10 nM [1].
in vivo: Single dose of PKI-402 (100 mg/kg) suppresses Akt phosphorylation (at T308) and induces cleaved PARP in MDA-MB-361 tumors. In normal tissue (heart and lung), PKI-402 (100 mg/kg) has minimal effect on p-Akt, with no detectable cleaved PARP. Consistently, PKI-402 at 100 mg/kg (daily for 5 days, one round) reduces initial tumor volume of 260 mm3 to 129 mm3 and prevents tumor regrowth for 70 days in MDA-MB-361. PKI-402 significantly inhibits the growth of A549 tumors in nude mice at 25 mg/kg and 50 mg/kg. PKI-402 at 100 mg/kg (daily for 5 days, one round) causes significant (P < 0.01) reduction in tumor growth of U87MG [1].
References on PKI-402:
[1]. Mallon R et al. Antitumor efficacy profile of PKI-402, a dual phosphatidylinositol 3-kinase/mammalian target of rapamycin inhibitor. Mol Cancer Ther. 2010 Apr;9(4):976-84.

Solubility

DMSO <1.2mg/mL; Water <1.2mg/mL; Ethanol <1.2mg/mL

Melting point

Boiling point

Density

Formula Weight:

Flash point

Storage conditions

at -20°C 2 years

Appearance:

White to off-white solid