Transgenic mice expressing human IL-4 and IL-4Rα in type 2 immune response models; no atopic dermatitis model
“Although no preclinical models of atopic dermatitis were available a transgenic mouse expressing hIL-4 and hIL-4Rα was generated and used for proof of efficacy studies with dupilumab in models of type 2 immune responses.”
No in vivo atopic dermatitis model, so classical IL-4/IL-13-mediated type 2 immune response models were used
“Due to the lack of an in vivo model of atopic dermatitis the proof of principle experiments have been performed using classical models of type 2 immune response which have been shown to be mediated at least in part through signalling via IL-4 and IL-13.”
EMA: comprehensive basis for mechanism of action in AD and appropriateness of surrogate antibodies for toxicity studies
“Taken together the studies provide a comprehensive basis for the potential mechanism of action of dupilumab in atopic dermatitis as well as establishing the appropriateness of the surrogate antibodies for the toxicity studies.”