Baboon model of acquired TTP induced by an inhibitory anti-ADAMTS13 antibody (preventive and therapeutic dosing)
“The in vivo efficacy of caplacizumab was evaluated in a baboon model of TTP after preventive and therapeutic treatment. In this model mimicking the early onset of acquired TTP, the disease is induced by functional inhibition of ADAMTS13 through administration of an inhibitory monoclonal antibody (3H9).”
Baboons and guinea pigs are cross-reactive species; mice are not
“The non-clinical pharmacokinetic properties of caplacizumab were analysed in guinea pigs and baboons as cross-reactive species, as well as in mice (not cross-reactive).”
EMA: acute baboon model has limitations (no long-term/relapse data), superseded by clinical efficacy data
“This acute disease model has limitations as no information is available regarding the long-term effect and /or relapses of the disease. However, the lack of such preclinical information is considered superseded by clinical efficacy data in patients.”