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Infect Immun. 1992 February; 60(2): 523-528

Endogenous tumor necrosis factor, interleukin-6, and gamma interferon levels during Listeria monocytogenes infection in mice.

A Nakane, A Numata and T Minagawa

Department of Microbiology, Hokkaido University School of Medicine, Sapporo, Japan.

ABSTRACT

Mice were infected intravenously with a sublethal dose of Listeria monocytogenes cells and then levels of tumor necrosis factor (TNF), interleukin-6 (IL-6), and gamma interferon (IFN-gamma) in the bloodstreams, spleens, and livers were monitored. The maximum level of TNF was detected at 72 h in the spleens and livers, but TNF was never detected in the bloodstreams. IL-6 appeared in the bloodstreams and spleens and peaked at 48 h. The maximum level of IFN-gamma could be detected in all three specimens, and the highest titer was shown in the spleens. Endogenous TNF production was suppressed by in vivo administration of anti-CD4 monoclonal antibody (MAb) or anti-asialo GM1 antibody but not by anti-CD8 MAb, whereas none of these antibodies suppressed endogenous IL-6 production. Endogenous production of neither IL-6 nor IFN-gamma was inhibited in rabbit anti-recombinant mouse TNF-alpha antibody-treated mice. Similarly, production of TNF and IL-6 did not decrease in anti-mouse IFN-gamma MAb-treated animals, but TNF production was augmented in these animals. These results suggest that the these endogenous cytokines are produced by different mechanisms in L. monocytogenes infection.


Infect Immun. 1992 February; 60(2): 523-528




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