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
“An increase in TNF or IL-6 concentration was observed in 2 samples after nemolizumab exposure (1 sample for each of the cytokines), but the levels were considerably lower than the levels reached with the positive controls”
Crossed placenta in monkeys: offspring plasma on PND 7 comparable to dams
“Concentrations of nemolizumab in offspring plasma on postnatal day (PND) 7 were comparable to those in dams, suggesting that nemolizumab crossed the placenta.”
Higher postnatal loss in high-dose monkey ePPND; otherwise no unexpected or off-target toxicity
“In vitro and in vivo toxicity studies conducted with nemolizumab identified no unexpected toxicities or off-target findings, with the exception of higher postnatal loss in ePPND study in dams treated with high dose of 25 kg/mg/q2w.”
ADA in both monkey repeat-dose studies, neutralizing in some animals; ADA correlated with loss of exposure
“ADA were detected in both RTD studies, and in some animals neutralizing effects were evident. As expected, there was a good correlation between the development of ADA and loss of exposure to nemolizumab.”
PN: 7% treatment-emergent ADA, 3% neutralizing (24 weeks); AD: 6.1% (67/1092) up to 16 weeks
“Prurigo Nodularis: In the Phase 3 trials (OLYMPIA 1, OLYMPIA 2) up to 24 weeks, the incidence of treatment-emergent ADAs was 7%; neutralizing antibodies were seen in 3% of subjects. Atopic Dermatitis: In the phase 3 trials (ARCADIA 1, ARCADIA 2) up to 16 weeks, the incidence of treatment-emergent ADAs was 6.1% (67/1092).”