Anti-drug antibodies in 3/22 monkeys (13.6%), affecting serum concentration in one
“Antibody responses were observed in 3/22 (13.6%) Cynomolgus monkeys. An effect on cetuximab serum concentrations was observed for one of these animals only.”
Saturable clearance at higher doses; distribution mainly within plasma volume
“Clearance decreased and terminal half-life increased with increasing dose, indicating a saturated clearance at higher doses. Distribution volume indicated that cetuximab is mainly located in the plasma volume.”
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