Mubritinib (TAK 165)

Catalog No.S2216

Mubritinib (TAK-165) is a potent inhibitor of HER2/ErbB2 with IC50 of 6 nM in BT-474 cell; no activity to EGFR, FGFR, PDGFR, JAK1, Src and Blk in BT-474 cell line. Phase 1.

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Mubritinib (TAK 165) Chemical Structure

Mubritinib (TAK 165) Chemical Structure
Molecular Weight: 468.47

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Related Compound Libraries

Mubritinib (TAK 165) is available in the following compound libraries:

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Product Information

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  • Research Area
  • Inhibition Profile

Product Description

Biological Activity

Description Mubritinib (TAK-165) is a potent inhibitor of HER2/ErbB2 with IC50 of 6 nM in BT-474 cell; no activity to EGFR, FGFR, PDGFR, JAK1, Src and Blk in BT-474 cell line. Phase 1.
Targets HER2/ErbB2 [1]
(BT-474 cells)
EGFR [1]
(BT-474 cells)
FGFR [1]
(BT-474 cells)
(BT-474 cells)

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IC50 6.0 nM >25 μM >25 μM >25 μM
In vitro 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. [1]
In vivo Mubritinib 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. [1]

Protocol(Only for Reference)

Kinase Assay: [1]

Inhibition of HER2/erbB2 tyrosine kinase activity 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: [1]

Cell lines BT474, HT1376, UMUC-3, T24, ACHN, DU-145, PC-3, LN-REC4, and LNCaP cells
Concentrations Dissolved in DMSO, final concentrations ~50 mM
Incubation Time 72 hours
Method 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.

Animal Study: [1]

Animal Models Athymic 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 Dissolved in DMOS and diluted in saline
Dosages 10 or 20 mg/kg/day
Administration Orally twice daily

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

SpeciesMouseRatRabbitGuinea pigHamsterDog
Weight (kg)
Body Surface Area (m2)0.0070.0250.
Km factor36128520
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Rat dose (mg/kg) = mouse dose (22.4 mg/kg) ×  mouse Km(3)  = 11.2 mg/kg
rat Km(6)


[1] Nagasawa J, et al. Int J Urol, 2006, 13(5), 587-592.

Clinical Trial Information( data from, updated on 2016-07-30)

NCT Number Recruitment Conditions Sponsor
Start Date Phases
NCT00034281 Completed Breast Neoplasm|Pancreatic Neoplasm|Lung Neoplasm|Ovarian Neoplasm|Renal Neoplasm Takeda June 2002 Phase 1

Chemical Information

Download Mubritinib (TAK 165) SDF
Molecular Weight (MW) 468.47


CAS No. 366017-09-6
Storage 3 years -20℃powder
2 years -80℃in solvent
Synonyms N/A
Solubility (25°C) * In vitro DMSO 13 mg/mL (27.74 mM)
Water <1 mg/mL
Ethanol <1 mg/mL
In vivo 1% DMSO+30% polyethylene glycol+1% Tween 80 5 mg/mL
* <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.
Chemical Name (E)-1-(4-(4-((2-(4-(trifluoromethyl)styryl)oxazol-4-yl)methoxy)phenyl)butyl)-1H-1,2,3-triazole

Tech Support

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
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