Home Protein Tyrosine Kinase HER2 inhibitor Mubritinib (TAK 165) For research use only.

Mubritinib (TAK 165)

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.

Mubritinib (TAK 165) Chemical Structure

Mubritinib (TAK 165) Chemical Structure

CAS No. 366017-09-6

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Mubritinib (TAK 165) Related Products

Signaling Pathway

HER2 Signaling Pathways

HER2 Signaling Pathway

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.
Targets
HER2/ErbB2 [1]
(BT-474 cells)
6.0 nM
In vitro
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]
Kinase Assay 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 Research 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.
Experimental Result Images Methods Biomarkers Images PMID
Western blot pERK / ERK / pAKT / AKT / p-STAT3 / STAT3 / pHER2 / HER2 c-myc / p21 / p27 25407459
Growth inhibition assay Cell viability 25407459
In Vivo
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 20 mg/kg which is ineffective to UMUC-3 tumor growth. [1]
Animal Research 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
Dosages 10 or 20 mg/kg/day
Administration Orally twice daily
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT00034281 Completed
Breast Neoplasm|Pancreatic Neoplasm|Lung Neoplasm|Ovarian Neoplasm|Renal Neoplasm
Takeda
 June 2002 Phase 1

Chemical Information & Solubility

Molecular Weight 468.47 Formula

C25H23F3N4O2
CAS No. 366017-09-6 SDF Download Mubritinib (TAK 165) SDF
Smiles C1=CC(=CC=C1CCCCN2C=CN=N2)OCC3=COC(=N3)C=CC4=CC=C(C=C4)C(F)(F)F
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 13 mg/mL ( (27.74 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble


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Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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