PF-04691502

Химические свойства

Pale Yellow Solid

Использование

PF-04691502 is an ATP-competitive PI3K/mTOR inhibitor with IC50 of 32 nM and also inhibits Akt T308/S473 with IC50 of 7.5 nM/3.8 nM.

Ферментативный ингибитор

This ATP-competitive PI3K/mTOR dual inhibitor (FW = 325.49 g/mol; CAS 1013101-36-4; Solubility = 14 mg/mL DMSO, < 1 mg/ML H2O), also systematically named 2-amino-8-((1R,4R)-4-(2-hydroxyethoxy)cyclohexyl)-6-(6-methoxypyridin-3-yl)-4-methylpyrido[2,3-d]pyrimidin-7(8H)- one, potently inhibits recombinant Class-I PI3Kα (Ki = 1.8 nM), PI3Kβ (Ki = 2.1 nM), PI3Kδ (Ki = 1.6 nM), PI3Kγ (Ki = 1.9 nM), and mTOR (Ki = 16 nM) in biochemical assays, with little activity against either Vps34, AKT, PDK1, p70S6K, MEK, ERK, p38, or JNK. PF-04691502 also suppresses avian fibroblast transformation mediated by wild-type PI3K γ, δ, or mutant PI3Kα. In PIK3CA-mutant and PTEN-deleted cancer cell lines, PF- 04691502 reduces phosphorylation of AKT T308 (IC50 = 7.5–47 nM) and AKT S473 (IC50 = 3.8–20 nM) and inhibits cell proliferation (IC50 = 180– 310 nM). PF-04691502 also inhibite mTORC1 activity within cells, asmeasured by PI3K-independent, nutrient-stimulated assay (IC50 = 32 nM) and inhibited the activation of PI3K and mTOR downstream effectors, including AKT, FKHRL1, PRAS40, p70S6K, 4EBP1, and S6RP. Shortterm exposure to PF-04691502 predominantly inhibits PI3K, whereas mTOR inhibition persists for 24 to 48 hours. PF-04691502 also induces cell cycle G1 arrest, concomitant with upregulation of p27 Kip1 and reduction of retinbalstoma protein, or Rb. At doses below the maximal tolerable dose, PD-0325901 potently inhibits tumor growth, when Kras and/or PI3K are drivers of tumor growth and progression.