Patient-derived desmoid tumor cell lines in vitro; in vivo only in non-desmoid Notch-driven xenografts (e.g., T-ALL)
“Nirogacestat also demonstrated growth inhibition in various Notch expressing patient‐derived desmoid tumor cell lines in vitro with IC50s of 4‐160 µM. Nirogacestat exhibited anti‐tumor activity in numerous Notch‐driven tumor xenograft models in mice but did not induce tumor growth inhibition in a non‐Notch‐driven tumor xenograft model.”
✓ VerifiedFDA multi-discipline review, p. 48Source ↗
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
EMA: mechanism in desmoid tumors not well defined nonclinically; some efficacy evidence from patient-derived culture models
“While this mechanism is not well defined by non-clinical evaluations to date, some evidence of nirogacestat-mediated antitumour efficacy in DT has been established using patient-derived culture models.”