PKI-402
Catalog No.S2739
Molecular Weight(MW): 570.65
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.
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Biological Activity
| 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. | ||||||||||||||||||||||||||||||
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| In vitro |
Equivalent to the IC50 for wild-type PI3Kα, 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. In MDAMB-361, a breast tumor line with mutant PI3K-α (E545K) and elevated levels of Her2 receptor, PKI-402 treatment induces cleaved poly(ADP-ribose) polymerase (PARP), a marker for apoptosis. Less than 10% of MDAMB-361 cells exposed to PKI-402 at 0.3 μM (or higher) for 24 hours remain viable. [1] |
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| Cell Data |
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| 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] |
Protocol
| Kinase Assay:[1] |
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Fluorescence polarization format assay: Enzyme assays are done in fluorescent polarization (FP) format, adapted from the Echelon K-1100 PI3K FP assay kit protocol. Assay reaction buffer is 20 mM Hepes, pH 7.5, 2 mM MgCl2, 0.05% CHAPS, and 0.01% βME. Assay STOP/detection buffer is 100 mM Hepes, pH 7.5, 4 mM EDTA, 0.05% CHAPS. FP assays are run in Nunc 384-well black polypropylene fluor plates. The FP reaction is run in 20 μL of reaction buffer containing 20 μM PIP2, 25 μM ATP, and >4% DMSO. The reaction is run for 30 minutes at room temp. The reaction is stopped with 20 μL of STOP/detection buffer containing 10 nM probe and 40 nM GST-GRP. Assay plates are incubated for 2 hours, and fluorescence polarization is measured in a Perkin-Elmer Envision plate reader with TAMRA-FP filters. |
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| Cell Research:[1] |
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| Animal Research:[1] |
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Solubility (25°C)
| In vitro | DMSO | 0.4 mg/mL (0.7 mM) |
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| Water | Insoluble | |
| Ethanol | Insoluble | |
| In vivo | Add solvents to the product individually and in order(Data is from Selleck tests instead of citations): 30% PEG400+0.5% Tween80+5% propylene glycol For best results, use promptly after mixing. |
30 mg/mL |
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Chemical Information
| Molecular Weight | 570.65 |
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| Formula | C29H34N10O3 |
| CAS No. | 1173204-81-3 |
| Storage | powder |
| in solvent | |
| Synonyms | N/A |
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