Mice implanted with patient-derived lung cancer cells (ST-3107, HER2 exon 20-YVMA): dose-dependent tumor growth inhibition
“In one model, mice implanted with patient-derived lung cancer cells (ST-3107) expressing HER2 exon 20-YVMA demonstrated dose-dependent tumor growth inhibition (TGI) of ≥119% following twice daily oral administration of ≥30 mg/kg zongertinib.”
✓ VerifiedFDA multi-discipline review, p. 46Source ↗
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
In vitro data show inhibition of wild-type and TKD-mutant HER2 at clinical concentrations; non-TKD HER2 mutations not evaluated
“The Applicant did not evaluate the effect of zongertinib on non-TKD HER2 mutations in lung cancer cells. Overall, in vitro studies demonstrated that zongertinib inhibits wild-type HER2 and TKD HER2 mutations at clinically relevant concentrations.”
✓ VerifiedFDA multi-discipline review, p. 46Source ↗