ER+ breast cancer xenograft and patient-derived xenograft mouse models (≥96% TGI at ≥30 mg/kg/day)
“In in vivo ER+/PR+/HER2- xenograft and ER+ patient derived xenograft (PDX) breast cancer models, elacestrant led to ≥96% tumor growth inhibition (TGI) at ≥30 mg/kg/day.”
✓ VerifiedFDA multi-discipline review, p. 39Source ↗
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: xenograft data are proof of concept only; predictive value of in vivo models for patient efficacy is limited
“Thus, the predictive value of the in vivo models for the efficacy of elacestrant in (specific) patient (populations) is limited.”