Low anti-drug antibody incidence; neutralizing antibodies low in rats and negligible in monkeys
“Incidences of neutralizing antibodies were low in rats and negligible in monkeys.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Biodistribution & persistence
Crosses placenta: infant monkey serum levels at birth comparable to maternal
“Measurable alirocumab serum concentrations were observed in the infant monkeys at birth at comparable levels to maternal serum, indicating that alirocumab, like other IgG antibodies, crosses the placental barrier.”
Suppressed humoral immunity (TDAR) in infant monkeys exposed in utero; exaggerated lipid-lowering pharmacology
“dose-related decreases in T-cell dependent antibody response (predominantly IgG) to a known antigen (KLH) were observed in infant monkeys exposed to alirocumab in utero, which indicated suppression of adaptive immunity.”
✓ VerifiedFDA pharmacology/toxicology review, p. 11Source ↗
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