Human tumour xenografts in nude mice: single 6 mg/kg IP dose down-regulated tumour IGF-1R (target engagement, not a TED model)
“In nude mice bearing human tumours expressing IGF-1R, single dose of teprotumumab (6 mg/kg IP) lead to down-regulation of IGF-1R on the tumour cells as demonstrated ex vivo.”
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: TED mechanism of action plausible but not demonstrated to labeling standard; no PD study of autoantibody blockade
“Considering the overall weight of evidence (detailed in section 4.1.2 of this review, below), this reviewer concludes that the Applicant’s hypothesis may be accurate, but has not been demonstrated at the level usually expected for Investigator Brochure claims or labeling.”
✓ VerifiedFDA pharmacology/toxicology review, p. 25Source ↗