Weakly immunogenic; ADA in all groups (including pre-existing) without effect on exposure
“ADA response was assessed in the in vivo studies. Although antibodies were detected in all the studied groups, no effects were detected in brolucizumab exposure.”
Serum exposure after IVT >7000-fold (monkey) and >20000-fold (rabbit) lower than vitreous
“Following IVT administration, systemic (serum) exposure of free brolucizumab in rabbits and cynomolgus monkeys was found to be >20000-fold and >7000-fold lower than in vitreous humor.”
Systemic VEGF inhibition: potential impairment of fertility and embryo-fetal development
“Based on its mechanism of action (VEGF inhibitor), brolucizumab has the potential to impair fertility and embryo-foetal development in relation to the degree of systemic VEGF-inhibition.”
Monkey: ADA up to 47% (17/36) after final IVT dose; no correlation with dose or systemic exposure
“Regarding levels of ADA during pivotal repeated dose toxicity studies, increase was observed after the final injection (6 IVT) in Alcon Study N-12-042, wherein ADA levels were up to 47% (17/36 animals). However, no dose-response relationship and no correlation between ADA titers and systemic exposure were observed.”
Treatment-emergent ADA in 53% to 76% of patients; pre-existing in 36% to 64%
“Anti-brolucizumab antibodies were detected in the pre-treatment sample of 36% to 64% of treated naive patients. After initiation of dosing, anti-brolucizumab antibodies were detected in at least one serum sample in 53% to 76% of patients treated with BEOVU.”
In vitro whole-blood cytokine release far below alemtuzumab/TGN1412 controls; no effects on monkey TDAR, lymphocyte subsets or serum cytokines; ADA in some monkeys