It is provided an inhibitor of Toll-like Receptor 2 (TLR2) that specifically blocks an interaction between S1009A and Toll-like Receptor 2 (TLR2), and more particularly a humanized antibody against S100A9 protein for inhibiting and treating inflammatory conditions in a human patient. Particularly, this humanized antibody is specific for blocking the interaction between the S100A9 protein and the TLR-2 receptor.