“Treatment with reslizumab decreased pulmonary eosinophilia after ovalbumin challenge in mice and guinea pigs, as well as in Ascaris-challenged monkeys. Reslizumab also reduced eosinophil influx into the skin of antigen challenged New Zealand rabbits.”
✓ VerifiedFDA pharmacology/toxicology review, p. 21Source ↗
Why that model
Reslizumab binds human, monkey and mouse IL-5 with similar affinity, allowing testing of the clinical antibody in animals
“Reslizumab binds with similar affinity to human, monkey, and mouse IL-5 (KD = 24, 20, and 31 pM; respectively, as determined by BIAcore biosensor assays).”
✓ VerifiedFDA pharmacology/toxicology review, p. 30Source ↗
Reviewer's view of the efficacy data
EMA: asthma models support therapeutic potential, but effect on circulating eosinophils not investigated in pharmacology studies
“Testing of reslizumab in different animal models on asthma supports a therapeutic potential for reslizumab in airway eosinophilic conditions. It is however noted that the effect of reslizumab on eosinophils in circulation has not been investigated in any of the non-clinical pharmacology studies included in the dossier.”