Pelitinib (EKB-569)

Catalog No.S1392 Batch:S139203

Print

Technical Data

Formula

C24H23ClFN5O2
Molecular Weight 467.92 CAS No. 257933-82-7
Solubility (25°C)* In vitro DMSO 13 mg/mL (27.78 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 Pelitinib (EKB-569) is a potent irreversible EGFR inhibitor with IC50 of 38.5 nM. Pelitinib (EKB-569) also slightly inhibits Src, MEK/ERK and ErbB2 with IC50s of 282 nM, 800 nM and 1255 nM, respectively. Phase2.
Targets
EGFR [1] Src [1] MEK/ERK [1] ErbB2 [1] Raf [1]
38.5 nM 282 nM 800 nM 1.255 μM 3.353 μM
In vitro Pelitinib displays much higher inhibitory activity against EGFR, compared with the closely related c-erbB-2, as well as other kinases such as Src, Cdk4, c-Met, Raf, and MEK/ERK, with IC50 ranging from 282 nM for Src to >20 μM for Cdk4. Consistently, Pelitinib treatment significantly inhibits the autophosphorylation of EGFR but not c-Met in A431 cells. [1] Pelitinib potently inhibits the proliferation of normal human keratinocytes (NHEK), as well as A431 and MDA-468 tumor cells with IC50 of 61 nM, 125 nM, and 260 nM, respectively, while displaying little activity against MCF-7 cells with IC50 of 3.6 μM. Pelitinib inhibits EGF-induced phosphorylation of EGFR in A431 and NHEK cells with IC50 of 20-80 nM, as well as the phosphorylation of STAT3 with IC50 of 30-70 nM. Pelitinib at 75-500 nM also specifically inhibits the activation of AKT and ERK1/2, without affecting NF-κB pathway. In NHEK cells, Pelitinib also potently inhibits TGF-α mediated EGFR activation with IC50 of 56 nM, as well as activation of STAT3 and ERK1/2 with IC50 of 60 nM and 62 nM, respectively. [2]
In vivo A single oral dose of 10 mg/kg Pelitinib potently inhibits the EGFR phosphorylation in A431 xenografts with over-expressed EGFR, by 90% within 1 hour, and by >50% after 24 hours. Administration of Pelitinib at 20 mg/kg/day inhibits tumorigenesis in APCMin/+ mice by 87%, equivalent to the effect of used with 2 times doses of EKI-785 (40 mg/kg/day), consistent with greater in vivo potency. [1] Pelitinib selectively inhibits EGFR signaling in airway epithelial cells in vivo. In the mouse model of airway epithelial remodeling that is inducible by viral infection and features a delayed but permanent switch to goblet cell metaplasia, Pelitinib treatment at 20 mg/kg/day corrects all 3 aspects of epithelial remodeling, by completely blocking the increase of ciliated cells and decrease of Clara cells, and significantly inhibiting the metaplasia of goblet cells. [3]
Features An improved version of EKI-785.

Protocol (from reference)

Kinase Assay:

[1]
  • Autophosphorylation of EGFR in cells

    For experiments using cells in culture, A431 cells are treated with various concentrations of Pelitinib for 2.75 hours before co-incubation with 100 ng/mL EGF for 0.25 hour. Cells are washed twice with cold phosphate-buffered saline (PBS) before adding to lysis buffer (10 mM Tris, pH 7.5, 5 mM ethylenediamine tetra-acetic acid (EDTA), 150 mM NaCl, 1% Triton X-100, 1% Sodium deoxycholate, 0.1 % SDS, 1 mM PMSF, 10 mg/mL pepstatin A, 10 mg/mL leupeptin, 20 KIU/mL aprotinin, 2 mM sodium orthovanadate, and 100 mM sodium fluoride) for 20 minutes on ice, before immunoprecipitation and SDS-PAGE-immunoblotting. For immunoprecipitation, cultured cells are placed in cold lysis buffer and immediately homogenized on ice with a polytron with several pulses. The homogenate is first centrifuged at 2500 rpm (20 minutes, 4 °C) and then again at 14,000 rpm in a microcentrifuge (10 minutes, 4 °C). Supernatants (1000 μg protein) are incubated for 2 hours at 4 °C with 15 mL of EGFR polyclonal antibody. After 2 hours, 50 μL of protein G plus/protein A agarose beads is added and incubated with constant rotation for 2 hours at 4 °C. After washing with lysis buffer, beads are boiled for 2 minutes in Laemmli sample buffer. Proteins are then resolved by SDS-PAGE, transferred to immobilon membrane and probed overnight with an anti-phosphotyrosine antibody conjugated with horseradish peroxidase (HRP). Membranes are developed using the ECL reagent. Total EGFR protein is determined by stripping membranes and re-probing with receptor-specific antibodies. Quantitation of bands is done by densitometry, using ImageQuant software with a Molecular Dynamics laser transmittance scanner.
Cell Assay:

[2]
  • Cell lines

    NHEK, A431, MCF-7, and MDA-468

  • Concentrations

    Dissolved in DMSO, final concentrations ~10 μM

  • Incubation Time

    5 days

  • Method

    Cells are seeded in 96-well dishes, and after 2 hours, Pelitinib is added and incubated for 5 days. After incubation, the medium is removed from each well and fresh medium (150 μL) + 1 mg/mL MTT solution (50 μL) is added. After incubation for 2 hours at 37 °C, the medium is replaced with 150 μL DMSO, and absorbance at 540 nm in each well is determined. The IC50 is calculated by linear regression of the data.
Animal Study:

[1]
  • Animal Models

    Athymic nu/nu female mice bearing subcutaneous A431 tumors, or APCMin/+ male mice, a murine model of human familial adenomatous polyposis (FAP)

  • Dosages

    10, or 20 mg/kg/day

  • Administration

    Oral gavage

Customer Product Validation

Data from [Data independently produced by Infect Immun, 2014, 82(3), 1243-55]

Data from [J Immunol, 2012, 188, 4581-4589]

Data from [Data independently produced by , , Korean J Parasitol, 2017, 55(5):491-503]

Selleck's Pelitinib (EKB-569) has been cited by 11 publications

Integrative analysis of drug response and clinical outcome in acute myeloid leukemia [ Cancer Cell, 2022, S1535-6108(22)00312-9] PubMed: 35868306
EGFR Inhibition Potentiates FGFR Inhibitor Therapy and Overcomes Resistance in FGFR2 Fusion-Positive Cholangiocarcinoma [ Cancer Discov, 2022, 12(5):1378-1395] PubMed: 35420673
The multi-kinase inhibitor afatinib serves as a novel candidate for the treatment of human uveal melanoma [ Cell Oncol (Dordr), 2022, 45(4):601-619] PubMed: 35781872
Biomarker LEPRE1 induces pelitinib-specific drug responsiveness by regulating ABCG2 expression and tumor transition states in human leukemia and lung cancer [ Sci Rep, 2022, 12(1):2928] PubMed: 35190588
A Genome-Scale CRISPR Screen Identifies the ERBB and mTOR Signalling Networks as Key Determinants of Response to PI3K Inhibition in Pancreatic Cancer [ Mol Cancer Ther, 2020, 5;molcanther.1131.2019] PubMed: 32371585
Mapping phospho-catalytic dependencies of therapy-resistant tumours reveals actionable vulnerabilities. [ Nat Cell Biol, 2019, 21(6):778-790] PubMed: 31160710
Suppressors for Human Epidermal Growth Factor Receptor 2/4 (HER2/4): A New Family of Anti-Toxoplasmic Agents in ARPE-19 Cells [Kim YH Korean J Parasitol, 2017, 55(5):491-503] PubMed: 29103264
Sensitivity of Melanoma Cells to EGFR and FGFR Activation but Not Inhibition is Influenced by Oncogenic BRAF and NRAS Mutations. [Garay T, et al. Pathol Oncol Res, 2015, 10.1007/s12253-015-9916-9] PubMed: 25749811
Selective inhibition of human solute carrier transporters by multikinase inhibitors [Johnston RA, et al. Drug Metab Dispos, 2014, 42(11):1851-7] PubMed: 25165131
Role of epidermal growth factor receptor signaling in the interaction of Neisseria meningitidis with endothelial cells [Slanina H et al. Infect Immun, 2014, 82(3):1243-55] PubMed: 24379285

RETURN POLICY
Selleck Chemical’s Unconditional Return Policy ensures a smooth online shopping experience for our customers. If you are in any way unsatisfied with your purchase, you may return any item(s) within 7 days of receiving it. In the event of product quality issues, either protocol related or product related problems, you may return any item(s) within 365 days from the original purchase date. Please follow the instructions below when returning products.

SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.