Possible chemotaxis of human monocytes by N-acetylmuramyl-L-alanyl-D-isoglutamine

N-Acetylmuramyl-l-alanyl-d-isoglutamine (MDP) induced the chemotaxis of human blood monocytes without mediation of serum complement. Specificity (dependency on chemical structure) of the chemotactic activity of MDP was evidenced by a negligible activity of analogs lacking most of the immunomodulating activities of MDP.