Sapitinib(AZD8931)

AZD8931(Sapitinib)is a novel potent reversible small molecule epidermal growth factor receptor, ERBB2 (HER2) and ERBB3 inhibitor with an IC50 of 4, 3, 4 nM, respectively. In proliferation assays, AZD8931 was significantly more potent than gefitinib or lapatinib in specific squamous cell carcinoma of the head and neck and non-small cell lung carcinoma cell lines. In vivo, AZD8931 inhibited xenograft growth in a range of models while significantly affecting EGFR, erbB2, and erbB3 phosphorylation and downstream signaling pathways, apoptosis, and proliferation. It has a unique pharmacologic profile providing equipotent inhibition of EGFR, erbB2, and erbB3 signaling and showing greater antitumor activity than agents with a narrower spectrum of erbB receptor inhibition in specific preclinical models.