“In vivo, zidesamtinib demonstrated anti-tumor activity in patient-derived xenograft (PDX) murine models bearing subcutaneous NSCLC tumors expressing SDC4-ROS1 or CD74-ROS1G2032R following twice daily oral treatment at ≥0.2 mg/kg (SDC4-ROS1) or ≥1 mg/kg (CD74-ROS1G2032R).”
✓ VerifiedFDA multi-discipline review, p. 36Source ↗
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
FDA generally agreed with the primary pharmacology assessment, objecting only to subjective, potentially promotional terminology
“FDA generally agrees with the Applicant’s assessment of primary pharmacology; however, terminology such as is subjective and should be avoided as it may be considered promotional.”
✓ VerifiedFDA multi-discipline review, p. 43Source ↗