Fig. 4. BLU-285 demonstrates antitumor activity across multiple KIT-driven in vivo disease models. BLU-285 demonstrates antitumor activity across multiple KIT-driven in vivo disease models. BLU-285 antitumor activity in both primary and refractory KIT-driven disease models. (A to C) Antitumor activity (A), body weight (B), and PK/PD (C) relationship for BLU-285 and dasatinib in a P815 KIT D814Y mastocytoma allograft model. (D to F) Antitumor activity of BLU-285 and reference compounds (top) and pharmacodynamic analysis of KIT inhibition (bottom) in human GIST PDX models of disease with (D) KIT exon 11/17 delW557K558/Y823D, (E) KIT exon 11 delW557-V559insF, and (F) KIT exon 11/13 delW557K558/V654A mutations. QD, once daily; BID, twice daily. Erica K. Evans et al., Sci Transl Med 2017;9:eaao1690 Published by AAAS