An anti-CD3 monoclonal antibody protects mice against a lethal infection with Listeria monocytogenes through induction of endogenous cytokines.
Mice were protected against a lethal infection with Listeria monocytogenes when treated with low doses of an anti-CD3 monoclonal antibody (MAb). Injection of anti-CD3 MAb induced rapid production of endogenous tumor necrosis factor (TNF) in the spleens and endogenous gamma interferon (IFN-gamma) in the bloodstreams and spleens of mice. Administration of anti-Thy1.2 MAb or a combination of anti-CD4 MAb and anti-CD8 MAb resulted in suppression of anti-CD3 MAb-induced endogenous cytokine production and antilisterial resistance. Alternatively, in vivo depletion of anti-CD3 MAb-induced TNF and IFN-gamma by the simultaneous administration of antibodies against TNF and IFN-gamma suppressed anti-CD3 MAb-induced antilisterial resistance. Moreover, injection of anti-complement receptor type 3 (Mac-1, CD11b) resulted in inhibition of anti-CD3 MAb-induced antilisterial resistance. These results suggest that the preventive effect of anti-CD3 MAb might be due to activation of phagocytes by TNF and IFN-gamma induced by stimulating CD4+ T cells and CD8+ T cells with the MAb. Furthermore, treatment with anti-CD3 MAb did not inhibit establishment of acquired resistance against secondary infection with L. monocytogenes.
Nakane
A
A
Department of Microbiology, Hokkaido University School of Medicine, Sapporo, Japan.
Okamoto
M
M
Asano
M
M
Kohanawa
M
M
Minagawa
T
T
D000818:Animals; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D017252:CD3 Complex / Q000276:immunology*; D005260:Female; D007113:Immunity, Innate; D007371:Interferon-gamma / Q000096:biosynthesis*; D008089:Listeria monocytogenes / Q000254:growth & development; D008088:Listeriosis / Q000276:immunology*; D051379:Mice; D008810:Mice, Inbred C57BL; D010586:Phagocytes / Q000502:physiology; D016176:T-Lymphocyte Subsets / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis*
D000911:Antibodies, Monoclonal; D017252:CD3 Complex; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma