“Y-mAbs conducted a GLP-compliant 13-week toxicology study in nude rats.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Why that species
Immunodeficient nude rats (with NK cells and PMN) chosen to avoid anti-drug antibodies during long-term dosing; FDA judged the model inadequate
“Investigators reasoned that the use of nude rats rather than fully immune competent animals would allow for avoidance of the formation of anti-drug antibodies that would prevent long-term assessment of a human antibody in a rodent model.”
✓ VerifiedFDA multi-discipline review, p. 41Source ↗
Surrogate molecule
No surrogate in toxicology studies; the clinical antibody was tested in nude rats (literature anti-GD2 14.G2a used for rat pain pharmacology)
“Intravenous or intrathecal administration of a murine IgG2a isotype anti-GD2 monoclonal antibody (14.G2a) to adult immunocompetent Sprague Dawley rats led to mechanical allodynia, confirming the enhanced pain effect of anti-GD2 administration in animals.”
✓ VerifiedFDA multi-discipline review, p. 41Source ↗