Tucatinib (Irbinitinib, ONT-380, ARRY-380) is an oral, potent, selective, reversible and ATP-competitive small-molecule inhibitor of ErbB-2 (also called HER2) with IC50s of 8 nM and 7 nM for ErbB-2 and p95 HER2, respectively in cell-based assays, showing
Storage Temp
Store at -20°C
Shipped In
Ice chest + Ice pads
Grade
Moligand™
Action Type
INHIBITOR
Mechanism of action
Receptor protein-tyrosine kinase erbB-2 inhibitor
Product Description
Information
Tucatinib (Irbinitinib, ONT-380, ARRY-380) is an oral, potent, selective, reversible and ATP-competitive small-molecule inhibitor ofErbB-2(also called HER2) with IC50s of 8 nM and 7 nM for ErbB-2 and p95 HER2, respectively in cell-based assays, showing ~500-fold selective for HER2 vs EGFR. It has potential antineoplastic activity.
The compound is a reversible, ATP-competitive inhibitor with nanomolar potency against ErbB2 in both in vitro and in cell-based assays. Incell-based assays, ARRY-380 is ~500-fold selective for HER2 vs. EGFR and is equipotent against truncated p95-HER2.
In vivo
ARRY-380 significantly inhibits tumor growth in multiple HER2-dependent tumor xenograft models. It shows excellent activity in numerous mouse tumor models including breast (BT-474, MDA-MB-453), ovarian (SKOV-3) and gastric (N87) carcinoma models. In the BT-474 model, ARRY-380 demonstrated significant dose-related tumor growth inhibition (TGI; 50% at 50 mg/kg/d and 96% at 100 mg/kg/d) with numerous partial regressions (>50% reduction from baseline size).
1.Moulder SL, Borges VF, Baetz T, Mcspadden T, Fernetich G, Murthy RK, Chavira R, Guthrie K, Barrett E, Chia SK. (2017) Phase I Study of ONT-380, a HER2 Inhibitor, in Patients with HER2+-Advanced Solid Tumors, with an Expansion Cohort in HER2+ Metastatic Breast Cancer (MBC).. Clin Cancer Res, 23 (14):(3529-3536). [PMID:28053022]
2.Kulukian A, Lee P, Taylor J, Rosler R, de Vries P, Watson D, Forero-Torres A, Peterson S. (2020) Preclinical Activity of HER2-Selective Tyrosine Kinase Inhibitor Tucatinib as a Single Agent or in Combination with Trastuzumab or Docetaxel in Solid Tumor Models.. Mol Cancer Ther, 19 (4):(976-987). [PMID:32241871]
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