Cynomolgus monkey only (surrogate REGN646); mouse fertility study with surrogate REGN1103
“three pivotal repeat dose toxicity studies and an enhanced pre- and postnatal developmental toxicity study (ePPND) in cynomolgus monkey with REGN646 which is a fully human homologous antibody specific for cynomolgus monkey IL4Rα, and a subcutaneous fertility study in mice with REGN1103, a mouse homologous antibody that binds to IL4Rα.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗
Why that species
Dupilumab does not cross-react with nonclinical species, so homologous surrogates for monkey and mouse were developed
“Because dupilumab does not cross-react with species used to evaluate nonclinical safety, the sponsor developed a fully human homologous antibody, REGN646,”
✓ VerifiedFDA pharmacology/toxicology review, p. 16Source ↗
Surrogate molecule
Yes: REGN646 (anti-cynomolgus IL4Rα) for monkey repeat-dose and ePPND studies; REGN1103 (anti-mouse IL4Rα) for a mouse fertility study
“three pivotal repeat dose toxicity studies and an enhanced pre- and postnatal developmental toxicity study (ePPND) in cynomolgus monkey with REGN646 which is a fully human homologous antibody specific for cynomolgus monkey IL4Rα, and a subcutaneous fertility study in mice with REGN1103, a mouse homologous antibody that binds to IL4Rα.”
✓ VerifiedFDA pharmacology/toxicology review, p. 6Source ↗