title: Age-related changes in phagocytic activity and production of pro-inflammatory cytokines by lipopolysaccharide stimulated porcine alveolar macrophages.
abstract: The aim of the present study was to determine the age-related changes of phagocytic capacity and the kinetic production of cytokines in lipopolysaccharide-stimulated porcine alveolar macrophages. For this purpose, AMs were isolated from 5 (newborn), 40 (post-weaned) and 120 (young) day old pigs. Results of phagocytosis assay showed that AMs from newborn piglets had less phagocytic capacity than those of young pigs (P<0.05). For the kinetics study, cells and supernatant were collected at 1, 6, 12, 24, 36 and 48 h after LPS stimulation for quantification of cytokine mRNA and protein by quantitative real-time PCR and ELISA, respectively. The kinetics results showed that AMs from newborn piglets were significantly less capable of producing IL1β, IL6, IL12β, TNFα and IL8 than post-weaned piglets or young pigs. IL18 mRNA did not show significant differences between ages. MIP2 and MCP1 mRNA was higher in young pigs. Hence, higher production of cytokines by AMs may be the surfactant factors in the pulmonary host defense system. These results indicate that AMs from newborn piglets might be functionally immature, which may lead to increased susceptibility to lung infections. Future studies of cytokine kinetics in more animals are clearly needed to confirm these results across a wider age range.
authors.affiliation: Institute of Animal Science, University of Bonn, Endenicher Allee 15, 53115 Bonn, Germany. misl@itw.uni-bonn.de
authors.forename: Mohammad Ariful
authors.initials: MA
authors.lastname: Islam
authors.forename: Muhammad Jasim
authors.initials: MJ
authors.lastname: Uddin
authors.forename: Ernst
authors.initials: E
authors.lastname: Tholen
authors.forename: Dawit
authors.initials: D
authors.lastname: Tesfaye
authors.forename: Christian
authors.initials: C
authors.lastname: Looft
authors.forename: Karl
authors.initials: K
authors.lastname: Schellander
authors.forename: Mehmet Ulas
authors.initials: MU
authors.lastname: Cinar
mesh_terms: D000375:Aging / Q000276:immunology*; D000818:Animals; D001992:Bronchoalveolar Lavage Fluid / Q000166:cytology; D016207:Cytokines / Q000097:blood* / Q000235:genetics; D006090:Gram-Negative Bacteria / Q000276:immunology; D016905:Gram-Negative Bacterial Infections / Q000276:immunology*; D008070:Lipopolysaccharides / Q000276:immunology; D016676:Macrophages, Alveolar / Q000276:immunology* / Q000378:metabolism*; D010587:Phagocytosis; D012333:RNA, Messenger / Q000032:analysis; D013552:Swine
chemical_list: D016207:Cytokines; D008070:Lipopolysaccharides; D012333:RNA, Messenger