title: Activation of macrophages by quinonyl-N-acetylmuramyl dipeptide.
abstract: The effect of 6-O-QS-10-N-acetylmuramyl-L-valyl-D-isoglutamine methyl ester (quinonyl-MDP-66) on various functions of macrophages was examined. Mouse peritoneal macrophages, when treated either in vitro or in vivo with quinonyl-MDP-66 suspended in phosphate-buffered saline, showed a capacity for cytolysis and cytostasis against tumor targets and released H2O2 in the presence of phorbol myristate acetate. The macrophages induced by quinonyl-MDP-66 also had both antibody-dependent cell-mediated cytotoxicity and phagocytic activity against erythroid targets. The fact that synthetic quinonyl-MDP-66 stimulates the macrophages to become more cytotoxic than do other MDP analogs suggests that the lipophilic residue (QS-10) in quinonyl-MDP-66 may be important for the development of this activity.
mesh_terms: D000119:Acetylmuramyl-Alanyl-Isoglutamine / Q000031:analogs & derivatives* / Q000276:immunology / Q000494:pharmacology; D000818:Animals; D000920:Antibody-Dependent Cell Cytotoxicity / Q000187:drug effects; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D005260:Female; D006861:Hydrogen Peroxide / Q000096:biosynthesis; D008262:Macrophage Activation; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D010587:Phagocytosis / Q000187:drug effects
chemical_list: D000119:Acetylmuramyl-Alanyl-Isoglutamine; C023846:quinonyl-MDP-66; D006861:Hydrogen Peroxide