EAE and Sle1 autoimmune models in huCD19 transgenic mice: B-cell depletion, reduced autoantibodies and disease scores
“Treatment with inebilizumab effectively depleted CD19+ B cells and plasma cells in EAE huCD19 Tg mice. This led to a global reduction of autoantibodies in blood and in the CNS and to significantly reduced disease scores (Chen et al, 2014 and Chen et al, 2016).”
Human-CD19-specific antibody with poor cross-reactivity in rat, rabbit and monkeys, so huCD19 Tg mice were the relevant species
“The in vivo pharmacological activity of inebilizumab was evaluated in huCD19 Tg mice as the relevant species since this mAb was specific for human CD19 and had poor cross-reactivity with CD19 on the surface of B cells from rat, rabbit, baboon, rhesus monkey, African green monkey, or cynomolgus monkey.”
EMA: in vitro and in vivo studies comprehensive and relevant; proof of concept and mode of action established
“In general, the in vitro and in vivo studies were comprehensive and relevant. Proof of concept and mode of action were established and are supported.”