title: Pristane induces an indomethacin inhibitable inflammatory influx of CD4+ T cells and IFN-gamma production in plasmacytoma-susceptible BALB/cAnPt mice.
abstract: In BALB/cAnPt (BALB/c) mice, the intraperitoneal injection of pristane induces the formation of chronic oil granulomatous tissue and a high incidence of plasmacytomas (PCT). DBA/2N (DBA) and (BALB/c x DBA)F1 hybrid (CDF1) mice develop oil granulomas but no PCT. Recent studies comparing pristane-injected conventionally housed BALB/c mice with specific pathogen-free BALB/c mice (SPF) demonstrated a significant reduction in both the incidence of PCT and the T cell infiltration of oil granulomatous tissue in SPF mice. In this study, FACS analysis was performed to determine the proportion of myeloid, T. and B cells present in pristane-induced peritoneal exudate (PE), and oil granulomas (OG) of BALB/c, DBA, and CDF1 mice. At all time points studied, the majority of cells recovered from the PE and OG of all three strains of mice were Mac-1+, presumably macrophages and neutrophils. Neither Ly-5(B220)+ B cells nor CD8+ T cells were significantly altered by pristane injection. BALB/c mice had a dramatic influx of CD4+ T lymphocytes (three- to fivefold) more than 50 days after the initial injection of pristane. The PCT-resistant DBA and CDF1 mice did not. This increase in CD4+ cells in BALB/c mice was not significantly affected by a second injection of pristane nor was it induced by a second injection in DBA mice. Indomethacin, which has been shown to prevent the development of PCT in BALB/c mice, prevented the infiltration of CD4+ T cells. In addition, pristane-induced levels of interferon-gamma greater than controls were found in the peritoneal lavages of BALB/c mice at all time points tested but not in DBA or indomethacin-treated BALB/c mice. In contrast, pristane injection increased levels of interleukin-5 in DBA but not BALB/c mice.
authors.affiliation: Laboratory of Genetics, National Cancer Institute/National Institutes of Health, Bethesda, Maryland 20892.
authors.forename: A H
authors.initials: AH
authors.lastname: McDonald
authors.forename: A
authors.initials: A
authors.lastname: Degrassi
mesh_terms: D000818:Animals; D015704:CD4 Antigens / Q000276:immunology*; D007213:Indomethacin / Q000494:pharmacology*; D007249:Inflammation / Q000188:drug therapy*; D007371:Interferon-gamma / Q000378:metabolism*; D015848:Interleukin-5 / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D008811:Mice, Inbred DBA; D009374:Neoplasms, Experimental; D010954:Plasmacytoma / Q000139:chemically induced; D013601:T-Lymphocytes / Q000187:drug effects* / Q000276:immunology; D013729:Terpenes / Q000494:pharmacology*
chemical_list: D015704:CD4 Antigens; D015848:Interleukin-5; D013729:Terpenes; C009042:pristane; D007371:Interferon-gamma; D007213:Indomethacin