| Name | PI-273 |
| Description | PI-273, a Substrate-Competitive, Specific Small-Molecule Inhibitor of PI4KIIα, Inhibits the Growth of Breast Cancer Cells |
| In vitro | PI-273 exhibited the greatest inhibitory effect on PI4KIIα kinase activity (IC50 = 0.47 μmol/L) and suppressed cell proliferation. Surface plasmon resonance and thermal shift assays indicated that PI-273 interacted directly with PI4KIIα. The kinetic analysis identified PI-273 as a reversible competitive inhibitor with respect to the substrate phosphatidylinositol (PI), which contrasted with most other PI kinase inhibitors that bind the ATP binding site. PI-273 reduced PI4P content, cell viability, and AKT signaling in wild-type MCF-7 cells, but not in PI4KIIα knockout MCF-7 cells, indicating that PI-273 is highly selective for PI4KIIα. Mutant analysis revealed the role of palmitoylation insertion in the selectivity of PI-273 for PI4KIIα. In addition, PI-273 treatment retarded cell proliferation by blocking cells in G2-M, inducing cell apoptosis and suppressing colony-forming ability. Importantly, PI-273 significantly inhibited MCF-7 cell-induced breast tumor growth without toxicity. PI-273 is the first substrate-competitive, a subtype-specific inhibitor of PI4KIIα, the use of which will facilitate evaluations of PI4KIIα as a cancer therapeutic target. |
| In vivo | PI-273 (intraperitoneal injection; 25 mg/kg/day; 15 days) significantly reduces tumor volume and weight in MCF-7 xenografts [1]. PI-273 (0.5 mg/kg intravenously or 1.5 mg/kg intragastrically; 0.08-5 hours) has a half-life of 0.411 hours for intravenous administration and 1.321 hours for intragastric administration, with an absolute bioavailability of 5.1% [1]. |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
| Solubility Information | DMSO : 1 mg/mL, Sonication is recommended.
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| Keywords | PI4K | Inhibitor | PI4 kinases | PI 273 | Apoptosis | inhibit | Phosphatidylinositol 4 kinases | PI273 | PI-273 |
| Inhibitors Related | Stavudine | 5-Fluorouracil | Acetylcysteine | Kaempferol | Myricetin | Sodium 4-phenylbutyrate | L-Ascorbic acid | Dextran sulfate sodium salt (MW 4500-5500) | Metronidazole | Sorafenib | Tributyrin | Lidocaine hydrochloride |
| Related Compound Libraries | Apoptosis Compound Library | Bioactive Compound Library | Kinase Inhibitor Library | Anti-Cancer Metabolism Compound Library | Antioxidant Compound Library | Inhibitor Library | Metabolism Compound Library | Anti-Aging Compound Library | Bioactive Compounds Library Max | Anti-Cancer Active Compound Library |
United States
