Irbinitinib(ARRY-380; ONT-380) is a potent and selective HER2 inhibitor with IC50 of 8 nM, equipotent against truncated p95-HER2, 500-fold more selective for HER2 versus EGFR.

98%

Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

10 mM in DMSO

p95 HER2 ,ErbB2

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).