Gedatolisib (PKI-587)

Catalog No.S2628 Batch:S262804

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Technical Data

Formula

C32H41N9O4
Molecular Weight 615.73 CAS No. 1197160-78-3
Solubility (25°C)* In vitro DMSO 3 mg/mL (4.87 mM)
Water Insoluble
Ethanol Insoluble
* <1 mg/ml means slightly soluble or insoluble.
* 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.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Gedatolisib (PF-05212384, PKI-587) is a highly potent dual inhibitor of PI3Kα, PI3Kγ and mTOR with IC50 of 0.4 nM, 5.4 nM and 1.6 nM in cell-free assays, respectively. Phase 2.
Targets
PI3Kα [1]
(Cell-free assay)		 mTOR [1]
(Cell-free assay)		 PI3Kγ [1]
(Cell-free assay)
0.4 nM 1.6 nM 5.4 nM
In vitro PKI-587 shows potent inhibitory activity against PI3K-α, PI3K-γ and mTOR with IC50 of 0.4 nM, 5.4 nM and 1.6 nM, respectively. Furthermore, PKI-587 also exhibits its potency against the most frequently occurring mutant forms of PI3Kα, notably the H1047R and E545K with IC50 of 0.6 nM and 0.6 nM, respectively. [1] Correlated with suppression of phosphorylation of PI3K/mTOR signaling pathway proteins, PKI-587 causes tumor cell growth inhibition in MDA-361 and PC3-MM2 cell lines with IC50 of 4 nM and 13.1 nM, respectively. [1]
In vivo In nude mice, PKI-587 treatment at 25 mg/kg iv leads to low plasma clearance (7 (mL/min)/kg), high volume of distribution (7.2 L/kg), and long half-life, (14.4 hours). In the MDA-361 xenograft model, PKI-587 produces potent antitumor efficacy with the minimum efficacious dose (MED) of 3 mg/kg against MDA-361 tumors and maximum tolerated single dose (MTD) of 30 mg/kg. While in the H1975 (non-small-cell lung carcinoma, mutant EGFR [L858R, T790M]) xenograft model, PKI-587 at 25 mg/kg for 7 weeks results in 90% survival of the group treated. [1]

Protocol (from reference)

Kinase Assay:[1]
  • PI3K and mTOR kinase assay

    Enzyme assays are done in fluorescent polarization (FP) format, adapted from the Echelon K-1100 PI3K FP assay kit protocol. Human class I PI3Ks and PI3K-α mutants (E545K and H1047R) are produced in Sf9 or purchased from Upstate Biotech. GST-GRP1 (murine) is produced in Escherichia coli and isolated by GST-Sepharose. Assay buffers are reaction buffer [20 mM HEPES (pH 7.1), 2 mM MgCl2, 0.05% CHAPS, and 0.01% β-mercaptoethanol] and stop/detection buffer [100 mM HEPES (pH 7.5), 4 mM EDTA, 0.05% CHAPS]. FP reaction is run for 30 minutes at room temperature in 20 μL of reaction buffer containing 20 μM phosphatidylinositol 4,5-bisphosphate (PIP2), 25 μM ATP, and <4% DMSO. FP reaction is stopped with 20 μL of stop/detection buffer (10 nM probe and 40 nM GST-GRP), and after 2 hours, data are collected using an Envision plate reader. The routine assays with purified FLAG-TOR (FL and 3.5) are performed in 96-well plates as follows. Enzymes are first diluted in kinase assay buffer (10 mM Hepes (pH 7.4), 50 mM NaCl, 50 mM β-glycerophosphate, 10 mM MnCl2, 0.5 mM DTT, 0.25 μM microcystin LR, and 100 μg/mL BSA). To each well, 12 μL of the diluted enzyme is mixed briefly with 0.5 μL test inhibitor or control vehicle dimethyl sulfoxide (DMSO). The kinase reaction is initiated by adding 12.5 μL kinase assay buffer containing ATP and His6-S6K to give a final reaction volume of 25 μL containing 800 ng/mL FLAG-TOR, 100 μM ATP, and 1.25 μM His6-S6K. The reaction plate is incubated for 2 hours (linear at 1–6 hours) at room temperature with gentle shaking and then terminated by adding 25 μL Stop buffer (20 mM Hepes (pH 7.4), 20 mM EDTA, and 20 mM EGTA).
Cell Assay:[1]
  • Cell lines

    MDA-361 and PC3-MM2

  • Concentrations

    0-10 μM

  • Incubation Time

    72 hours

  • Method

    Cells are plated in 96-well culture plates at about 3000 cells per well. One day following plating, PKI-587 is added to cells. Three days after PKI-587 treatment, viable cell densities are determined by measuring metabolic conversion (by viable cells) of the dye MTS, a previously established cell proliferation assay. For each assay, MTS and PMS stocks are freshly thawed and mixed (MTS/PMS, 20:1). The MTS/PMS mixture is then added to 96-well cell plates at 20 μL/well, and plates are incubated for 1 hour–2 hours in cell culture incubator. MTS assay results are read in a 96-well format plate reader by measuring absorbance at 490 nm. The effect of each PKI-587 treatment is calculated as a percentage of control cell growth obtained from vehicle-treated cells grown in the same culture plate.
Animal Study:[1]
  • Animal Models

    MDA-361 and H1975 cells are injected subcutaneously into the nude mice.

  • Dosages

    ≤30 mg/kg

  • Administration

    Administered via i.v.

Customer Product Validation

Data from [Data independently produced by Pigment Cell Melanoma Res, 2014, 27(5), 813-21]

, , Dr. Zhang of Tianjin Medical University

Selleck's Gedatolisib (PKI-587) has been cited by 25 publications

AKT1 phosphorylation of cytoplasmic ME2 induces a metabolic switch to glycolysis for tumorigenesis [ Nat Commun, 2024, 15(1):686] PubMed: 38263319
Selective Eradication of Colon Cancer Cells Harboring PI3K and/or MAPK Pathway Mutations in 3D Culture by Combined PI3K/AKT/mTOR Pathway and MEK Inhibition [ Int J Mol Sci, 2023, 24(2)1668] PubMed: 36675180
RECOVER identifies synergistic drug combinations in vitro through sequential model optimization [ Cell Rep Methods, 2023, 3(10):100599] PubMed: 37797618
In Vitro Angiogenesis Inhibition and Endothelial Cell Growth and Morphology [ Int J Mol Sci, 2022, 23(8)4277] PubMed: 35457095
Fibroblast-Induced Paradoxical PI3K Pathway Activation in PTEN-Competent Colorectal Cancer: Implications for Therapeutic PI3K/mTOR Inhibition [ Front Oncol, 2022, 12:862806] PubMed: 35719951
BPTF promotes the progression of distinct subtypes of breast cancer and is a therapeutic target [ Front Oncol, 2022, 12:1011173] PubMed: 36530982
Changes in intracellular activation-related gene expression and induction of Akt contribute to acquired resistance toward nelarabine in CCRF-CEM cell line [ Leuk Lymphoma, 2022, 63(2):404-415] PubMed: 35080473
Microenvironment drives cell state, plasticity, and drug response in pancreatic cancer [ Cell, 2021, 184(25):6119-6137.e26] PubMed: 34890551
The PI3K/mTOR inhibitor Gedatolisib eliminates dormant breast cancer cells in organotypic culture, but fails to prevent metastasis in preclinical settings [ Mol Oncol, 2021, 10.1002/1878-0261.13031] PubMed: 34058066
ABCB1 and ABCG2 restricts the efficacy of gedatolisib (PF-05212384), a PI3K inhibitor in colorectal cancer cells [ Cancer Cell Int, 2021, 21(1):108] PubMed: 33593355

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SHIPPING AND STORAGE
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