title: Innate immune properties of the immortalized macrophage cell line I-9.5.
abstract: A colony stimulating factor-1-dependent macrophage cell line, I-9.5, originally derived from a BALB/c splenic macrophage colony, was maintained in culture and examined for the expression of certain properties key to its innate immune function. Chemotaxis, phagocytosis, and superoxide release were assessed in this cell line and compared to either freshly isolated elicited murine peritoneal or splenic macrophages from BALB/c mice. Three separate experiments indicated that I-9.5 displayed comparable phagocytosis of 14C-radio-labeled Staphylococcus aureus and similar levels of superoxide release in response to opsonized zymosan. I-9.5, however, demonstrated impaired chemotaxis toward the chemoattractant, N-formyl-methionyl-leucyl-phenylalanine, and displayed impaired random migration in response to a balanced salt solution. This observation suggests that I-9.5 may serve as an important model for elucidating the structural and molecular correlates of chemotaxis.
authors.affiliation: Department of Biological Science, California State University, Fullerton 92634-9480, USA.
authors.forename: W
authors.initials: W
authors.lastname: Chang
authors.forename: S H
authors.initials: SH
authors.lastname: Yeh
authors.forename: D B
authors.initials: DB
authors.lastname: Drath
mesh_terms: D000818:Animals; D002250:Carbon Radioisotopes; D002461:Cell Line, Transformed; D002633:Chemotaxis; D008264:Macrophages / Q000276:immunology*; D017737:Macrophages, Peritoneal / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D009240:N-Formylmethionine Leucyl-Phenylalanine; D010587:Phagocytosis; D013154:Spleen / Q000166:cytology; D013211:Staphylococcus aureus; D013481:Superoxides / Q000378:metabolism
chemical_list: D002250:Carbon Radioisotopes; D013481:Superoxides; D009240:N-Formylmethionine Leucyl-Phenylalanine