title: Macrophage activation by muramyl dipeptide (MDP) without lymphocyte participation.
abstract: An increase in the numbers of spread macrophages caused by macrophage stimulants was found to be a very sensitive measure for macrophage activation. Muramyl dipeptide (MDP), bacterial lipopolysaccharide (LPS), and lymphokines were found to activate macrophages dose-dependently as measured by this parameter. Macrophage activation by MDP was strictly dependent on its adjuvant-active stereochemically specific structures. Macrophage activation by MDP and LPS occurred without lymphocyte participation. It is suggested that LPS also activates macrophages via lymphocytes.
mesh_terms: D000119:Acetylmuramyl-Alanyl-Isoglutamine / Q000494:pharmacology*; D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005260:Female; D006020:Glycopeptides / Q000494:pharmacology*; D006168:Guinea Pigs; D007700:Kinetics; D008070:Lipopolysaccharides / Q000494:pharmacology; D008214:Lymphocytes / Q000502:physiology*; D008222:Lymphokines / Q000494:pharmacology; D008264:Macrophages / Q000502:physiology*
chemical_list: D006020:Glycopeptides; D008070:Lipopolysaccharides; D008222:Lymphokines; D000119:Acetylmuramyl-Alanyl-Isoglutamine