Avapritinib (BLU-285) (C09-0735-557)

InformationAvapritinib (BLU-285) is a small molecule kinase inhibitor that potently inhibitsPDGFRα D842Vmutant activity in vitro (IC50 = 0.5 nM) and PDGFRα D842V autophosphorylation in the cellular setting (IC50 = 30 nM); also a potent inhibitor of the analogousKit (c-Kit)mutation, D816V in Kit (c-Kit) Exon 17 (IC50 = 0.5 nM).TargetsPDGFRα (D842V) ; c-Kit (D816V) 0.5 nM; 0.5 nMIn vitroBLU-285 is a selective oral inhibitor that targets KIT Exon 17 and PDGFRα D842 activation loop mutants. Cellular assays measuring inhibition of KIT mutant autophosphorylation confirm the activity of BLU-285 against the KIT D816 mutants D816V (HMC1.2 cells, IC50 = 3 nM) and D816Y (P815 cells, IC50 = 22 nM) as well as other KIT Exon 17 mutants such as N822K (Kasumi cells, IC50 = 40 nM) found in treatment-refractory GIST.In vivoBLU-285 is a well-tolerated, orally bioavailable agent that achieves dose dependent tumor growth inhibition in a D816Y-driven xenograft model. A PK-PD-efficacy relationship with BLU-285 has been established demonstrating that tumor regression results from >90% target suppression and is observed with 30 mg/kg once daily dosing. With potent activity against PDGFRα D842V and KIT Exon 17 mutants, BLU-285 targets previously unaddressed genomic drivers of disease and provides promise for the treatment of PDGFRα D842V-driven GIST(gastrointestinal stromal tumor) or SM(systemic mastocytosis), where more than 90% of patients carry the KIT D816V mutation. Besides single agent activity, the highly selective BLU-285 offers an opportunity for combination with other agents in GIST to cover the entirety of KIT primary and resistance mutants. Specification: 0.98 Molecular Formula: C26H27FN10 Molecular Weight: 498.56 PubChem CID: 118023034 Isomeric SMILES: C[C@](C1=CC=C(C=C1)F)(C2=CN=C(N=C2)N3CCN(CC3)C4=NC=NN5C4=CC(=C5)C6=CN(N=C6)C)N Related Documents: https://ald-pub-files.oss-cn-shanghai.aliyuncs.com/aladdinsci/pdp/sds/1/A414052-SCI_fb2095bf748af80262a3855e326adf7c.pdf