Lymphokine expression profile of resting and stimulated CD4+ CTL clones specific for the glycoprotein of vesicular stomatitis virus.
A panel of long-term murine T lymphocyte clones specific for the glycoprotein of vesicular stomatitis virus (VSV) in association with either H-2I-Ad or I-E(d) was tested for the production of cytokines in both resting and poststimulation states using both in situ hybridization and bioassay. All but one of the clones showed antigen-specific cytolytic activity in a 4-hr 51Cr release assay. Unexpectedly, the clones did not appear to be typical Th1 cells. Five of these T cell clones produced both IL-2 and IFN-gamma but not IL-4 after stimulation with either phorbol 12-myristate 13-acetate (PMA) or concanavalin A (Con A). Some clones constitutively expressed mRNA for IL-2 and INF-gamma. The proliferation of these clones was factor independent, suggesting an autocrine growth mechanism. Three clones produced variable levels of IL-4 mRNA and some, to significant quantities, of IL-2 mRNA. One cytolytic clone produced neither IL-2 nor IL-4 mRNA to detectable levels, although mRNA for IFN-gamma was observed. A noncytolytic, Ag-specific clone produced IL-6, tumor necrosis factor (TNF), and lymphotoxin (LT), but no IL-2, IL-4, or IFN-gamma mRNA. There was a strong quantitative correlation between the expression of IL-2-, INF-gamma-, and LT-specific mRNAs by the clones. All the T cell clones tested which secreted INF-gamma and LT expressed no measurable IL-4 mRNA. We examined expression of several other genes in the panel of clones. These included TNF, met-enkephalin (met-enk), IL-1, and IL-6. IL-1 m-RNA synthesis was not observed in any of the T cell clones. Almost all clones produced TNF mRNA. Parallel bioassays showed that secreted IL-2/IL-4 activity levels and mRNA levels correlated well for all clones. Thus, we observed a great degree of heterogeneity among CD4+ cytolytic T lymphocyte clones.
Cao
B N
BN
Division of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115.
Huneycutt
B S
BS
Gapud
C P
CP
Arceci
R J
RJ
Reiss
C S
CS
D000818:Animals; D001483:Base Sequence; D015704:CD4 Antigens / Q000032:analysis; D002999:Clone Cells / Q000276:immunology / Q000378:metabolism; D006023:Glycoproteins / Q000276:immunology*; D007371:Interferon-gamma / Q000378:metabolism; D007376:Interleukin-2 / Q000378:metabolism; D051379:Mice; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000032:analysis; D016415:Sequence Alignment; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000378:metabolism; D014721:Vesicular stomatitis Indiana virus / Q000276:immunology*; D014764:Viral Proteins / Q000276:immunology*
D015704:CD4 Antigens; D006023:Glycoproteins; D007376:Interleukin-2; D012333:RNA, Messenger; D014764:Viral Proteins; D007371:Interferon-gamma