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    Mubritinib (TAK 165)
    Mubritinib (TAK 165)

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    This product is for research use only, not for human use. We do not sell to patients.
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    InvivoChem Cat #: V0581
    CAS #: 366017-09-6Purity ≥98%

    Description: Mubritinib (formerly also known as TAK165; TAK-165) is a novel, potent, selective and investigational inhibitor of HER2/ErbB2 with potential anticancer activity. It inhibits HER2/ErbB2 with an IC50 of 6 nM in BT-474 cells; it has no activity against EGFR, FGFR, PDGFR, JAK1, Src and Blk in BT-474 cells. It was developed by Takeda for the treatment of cancer and has completed phase I clinical trials (may have been discontinued since December 2008). Mubritinib displays potent anti-proliferative activity against ErbB2-overexpressing cancer cell lines with an IC50 of 5 nM in BT474 breast cancer cells, and significant in vivo antitumor efficacy aganinst bladder, breast and prostate cancer xenografts in vivo.

    References: Int J Urol. 2006 May;13(5):587-92.

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    Molecular Weight (MW)468.47
    CAS No.366017-09-6
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 13 mg/mL (27.7 mM)
    Water: <1 mg/mL
    Ethanol: <1 mg/mL
    Solubility (In vivo)1% DMSO+30% polyethylene glycol+1% Tween 80: 5mg/mL
    SynonymsTAK-165; Mubritinib; TAK 165; TAK165 

    Chemical Name: (E)-4-((4-(4-(1H-1,2,3-triazol-1-yl)butyl)phenoxy)methyl)-2-(4-(trifluoromethyl)styryl)oxazole


    InChi Code: InChI=1S/C25H23F3N4O2/c26-25(27,28)21-9-4-20(5-10-21)8-13-24-30-22(18-34-24)17-33-23-11-6-19(7-12-23)3-1-2-15-32-16-14-29-31-32/h4-14,16,18H,1-3,15,17H2/b13-8+

    SMILES Code: FC(C1=CC=C(C=C1)/C=C/C2=NC(COC3=CC=C(CCCCN4N=NC=C4)C=C3)=CO2)(F)F

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    In Vitro

    In vitro activity: Mubritinib displays > 4000-fold selectivity over other tyrosine kinases, such as EGFR, FGFR, PDGFR, Jak1, Src and Blk. Mubritinib even at low concentration of 0.1 μM significantly blocks HER2 phosphorylation, leading to the downregulation of PI3K-Akt and MAPK pathway in cell line BT474 with high level of HER2. Mubritinib not only exhibits highly potent antiproliferative effect in ErbB2-overexpressing cancer cell line BT474 with an IC50 of 5 nM, but also displays marked antiproliferative effects in cell lines with HER2 expressed weakly with IC50 of 53 nM, 90 nM and 91 nM for LNCaP, LN-REC4 and T24, respectively. Mubritinib displays no inhibitory activities against PC-3 cells with HER2 expressed very faintly with IC50 of 4.62 μM, as well as EGFR-overexpressing HT1376 and ACHN cell lines with IC50 of >25 μM.

    Kinase Assay: BT-474 cells are seeded on 24-well plates and cultured overnight. Mubritinib is then added at various concentrations. After incubation for 2 hours, the cells are harvested directly into sodium dodecyl sulfate (SDS)-sample buffer (200 μL). Aliquots containing equal amounts of total cell extract are run on 7.5% to 15% gradient SDS–polyacrylamide gel electrophoresis (PAGE). Following electrophoresis, proteins are transferred onto a polyvinylidene fluoride (PVDF) membrane, for western blot analysis using a relevant primary antibody. Detection of protein is accomplished by an enhanced chemiluminescent (ECL) detection method. The extent of tyrosine phosphorylation of HER2/erbB2 is measured by the LAS-1000 plus lumino-image analyser. The concentration of Mubritinib that inhibits HER2/erbB2 phosphorylation by 50% (IC50) is calculated from a dose–response curve generated by least-squares linear regression of the response using SAS software.

    Cell Assay: Cells (BT474, HT1376, UMUC-3, T24, ACHN, DU-145, PC-3, LN-REC4, and LNCaP cells) are seeded into 6-well plates and cultured overnight. Mubritinib is then added at various concentrations, and the cells are treated continuously for 72 hours. After the incubation period, cells are counted for the measurement of antiproliferative activity.

    In VivoMubritinib significantly inhibits LN-REC4 xenograft with treatment/control tumor volume ratio of 26.5%. Although ineffective to inhibit the growth of UMUC-3 and ACHN cells in vitro (IC50s of 1.812 and >25 μM, respectively), oral administration of Mubritinib (10 or 20 mg/kg per day) significantly inhibits the growth of UMUC-3 and ACHN xenografts with treatment/control tumor volume ratio of 22.9% and 26%, respectively, as compared with Herceptin (20 mg/kg) which is ineffective to UMUC-3 tumor growth.
    Animal modelAthymic nude mice (BALB/c nu/nμ) and SCID mice (C.B.-17 Scid/Scid) are implanted subcutaneously with UMUC-3, LN-REC4 or ACHN cells
    Formulation & DosageDissolved in DMSO; 10 or 20 mg/kg/day; p.o.

    Int J Urol. 2006 May;13(5):587-92.

    These protocols are for reference only. InvivoChem does not independently validate these methods.


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