The equilibrium KD of Ixekizumab for human and cynomolgus monkey IL-17A were 1.8 pM and 0.8 pM, respectively. Ixekizumab also bound to rabbit IL-17A, but the affinity was lower, and the binding was heterogeneous (KD of 1.3 nM and 14 nM). Ixekizumab shows no binding to either mouse or rat IL-17A.
Ixekizumab (0.1-10000 pM) inhibits human IL-17A- or human IL-17A/F heterodimer-induced growth-regulated oncogene (GRO)α secretion from HT-29 cells in a dose-dependent fashion. Ixekizumab inhibits cynomolgus monkey IL-17A-induced GROα secretion from HT-29 cells in a dose-dependent fashion.