title: Differential production of chemokines by phagocytosing rat neutrophils and macrophages.
abstract: In this study, rat neutrophils and macrophages produced cytokine-induced neutrophil chemoattractants (CINCs) and rat macrophage inflammatory protein-1 alpha (MIP-1 alpha) in different patterns during phagocytosis of heat-killed yeast cells in vitro. The cultured supernatants of the phagocytosing rat neutrophils and macrophages had chemotactic activities toward neutrophils, and the chemotactic potencies were markedly inhibited by anti-CINCs IgGs or/and anti-MIP-1 alpha IgG, suggesting that CINCs and MIP-1 alpha are major neutrophil chemoattractants produced by the phagocytosing neutrophils and macrophages. Dexamethasone suppressed the production of CINCs and MIP-1 alpha by the phagocytosing cells in a dose-dependent manner. Our results demonstrate significant differences in the production of CINCs and MIP-1 alpha by neutrophils and macrophages during phagocytosis of yeast cells and thus may suggest the different contribution of each chemokine to neutrophil recruitment in the processes of inflammation in rats.
authors.affiliation: Department of Physiological Chemistry, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: al-Mokdad
authors.forename: F
authors.initials: F
authors.lastname: Shibata
authors.forename: K
authors.initials: K
authors.lastname: Takano
authors.forename: H
authors.initials: H
authors.lastname: Nakagawa
mesh_terms: D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D054407:Chemokine CCL4; D018925:Chemokines / Q000096:biosynthesis* / Q000235:genetics; D019743:Chemokines, CXC; D002630:Chemotactic Factors / Q000096:biosynthesis / Q000235:genetics; D017931:DNA Primers / Q000235:genetics; D003907:Dexamethasone / Q000494:pharmacology; D006133:Growth Substances / Q000096:biosynthesis / Q000235:genetics; D007249:Inflammation / Q000209:etiology; D036341:Intercellular Signaling Peptides and Proteins; D007700:Kinetics; D019402:Macrophage Inflammatory Proteins / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D008264:Macrophages / Q000187:drug effects / Q000276:immunology / Q000502:physiology*; D009504:Neutrophils / Q000187:drug effects / Q000276:immunology / Q000502:physiology*; D010587:Phagocytosis / Q000502:physiology*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D012441:Saccharomyces cerevisiae / Q000276:immunology
chemical_list: D054407:Chemokine CCL4; D018925:Chemokines; D019743:Chemokines, CXC; D002630:Chemotactic Factors; D017931:DNA Primers; D006133:Growth Substances; D036341:Intercellular Signaling Peptides and Proteins; D019402:Macrophage Inflammatory Proteins; D012333:RNA, Messenger; D003907:Dexamethasone