title: Constitutive and LPS-induced gene expression in a macrophage-like cell line from the rainbow trout (Oncorhynchus mykiss).
abstract: The lack of cell lines from mononuclear phagocytes of salmonid fish has impeded the study of immune function at a cellular level in these economically and ecologically important animals. Here, we report on the further characterization of RTS11, a previously described macrophage-like cell line from the rainbow trout spleen, with regard to its expression of a number of immunologically relevant genes. Analysis of gene expression by reverse transcription-polymerase chain reaction, using rainbow-trout-specific primers demonstrated that RTS11 cells express the beta chain of the class II major histocompatibility complex, the cytokines transforming growth factor-beta (TGF-beta) and interleukin-1beta (IL-1beta), and cyclo-oxygenase-2 (COX-2). Inducing the cells with lipopolysaccharide led to increased expression of IL-1beta and COX-2, as determined by Northern blotting. These results together suggest that RTS11 retains many of the characteristics expected of mature macrophages, and should be a valuable tool for further study of the expression and function of these immunomodulatory proteins in fish.
authors.affiliation: Department of Biology, University of Waterloo, Ont., Canada.
authors.forename: J L
authors.initials: JL
authors.lastname: Brubacher
authors.forename: C J
authors.initials: CJ
authors.lastname: Secombes
authors.forename: J
authors.initials: J
authors.lastname: Zou
authors.forename: N C
authors.initials: NC
authors.lastname: Bols
mesh_terms: D000818:Animals; D002460:Cell Line; D051546:Cyclooxygenase 2; D016207:Cytokines / Q000096:biosynthesis; D005786:Gene Expression Regulation / Q000276:immunology*; D000949:Histocompatibility Antigens Class II / Q000096:biosynthesis; D007527:Isoenzymes / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008264:Macrophages / Q000201:enzymology / Q000276:immunology* / Q000378:metabolism*; D017686:Oncorhynchus mykiss / Q000235:genetics / Q000276:immunology*; D011451:Prostaglandin-Endoperoxide Synthases / Q000096:biosynthesis
chemical_list: D016207:Cytokines; D000949:Histocompatibility Antigens Class II; D007527:Isoenzymes; D008070:Lipopolysaccharides; D051546:Cyclooxygenase 2; D011451:Prostaglandin-Endoperoxide Synthases