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- W4313331998 abstract "Abstract The mechanisms regulating resistance or susceptibility to African trypanosomes have been enigmatic. In this study, we assessed the production of several cytokines (IL-4, IFN-γ, and TNF-α) in vivo and in vitro using genetically susceptible (BALB/c) or resistant (C57BL/6) mice infected with cloned Trypanosoma congolense and the role of these cytokines in pathogenesis of this infection. Plasma of infected BALB/c mice contained higher levels of IL-4 and IFN-γ than the plasma of infected C57BL/6 mice. Conversely, plasma TNF-α levels were elevated significantly in the resistant mice relative to the susceptible ones. Splenic IFN-γ mRNA appeared earlier and were maintained at higher levels in infected BALB/c than in C57BL/6 mice. Both spontaneous and Con A-induced secretions of IL-4 and IFN-γ by splenocytes from infected BALB/c mice were significantly higher than those from their C57BL/6 counterparts. Con A-induced proliferation of splenocytes from infected BALB/c mice was progressively suppressed. Nitric oxide was not involved in this suppression, but the suppression was positively correlated with IFN-γ secretion. Addition of neutralizing Abs to IFN-γ to cultures of Con A-stimulated spleen cells from infected BALB/c mice effectively reversed this suppression. Furthermore, administration of anti-IFN-γ Abs to BALB/c mice early during infection dramatically shifted the phenotype of these susceptible mice to a more resistant-like phenotype, as expressed by a low and undulating parasitemia and a >300% increase in survival period. These results strongly suggest that the enhanced induction and secretion of IFN-γ during T. congolense infections contribute to the relative susceptibility of BALB/c mice to the disease." @default.
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- W4313331998 date "1998-11-15" @default.
- W4313331998 modified "2023-10-17" @default.
- W4313331998 title "Experimental Murine<i>Trypanosoma congolense</i>Infections. I. Administration of Anti-IFN-γ Antibodies Alters Trypanosome-Susceptible Mice to a Resistant-Like Phenotype" @default.
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- W4313331998 doi "https://doi.org/10.4049/jimmunol.161.10.5507" @default.
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