“The in vivo activity of BGB-3111 was evaluated in a subcutaneous xenograft model of MCL, using the REC-1 cell line.”
✓ VerifiedFDA multi-discipline review, p. 29Source ↗
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: mode-of-action proof of concept shown, but not entirely convincing (no ex vivo primary lymphoma data; limited systemic xenograft efficacy)
“However, since ex vivo studies using relevant primary lymphoma cells are missing and the efficacy in the systemic xenograft model appear limited, non-clinical proof of concept is not entirely convincing.”