“In vivo, sevabertinib exhibited antitumor activity against NSCLC patient-derived xenograft (PDX) models harboring the HER2 exon 20 insertion YVMA.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Why that model
Not stated in public reviews
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reviewer's view of the efficacy data
Inhibits WT HER2 and HER2 exon 20 insertion/point mutants in cells at concentrations below clinical free Cmax
“In cellular assays, sevabertinib inhibited the in vitro proliferation of cells overexpressing WT HER2 (IC50 = 5.30 nM) and a panel of HER2 exon 20 insertion mutations and activating point mutations (IC50 = 0.54 to 13.9 nM) at concentrations below the free Cmax of 88 nM at the recommended dose of 20 mg BID based on ~95% protein binding.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗