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- W1994310347 abstract "Viral infections induce CD8 T cell expansion and interferon (IFN)-gamma production for defense, but the innate cytokines shaping these responses have not been identified. Although interleukin (IL)-12 has the potential to contribute, IL-12-dependent T cell IFN-gamma has not been detected during viral infections. Moreover, certain viruses fail to induce IL-12, and elicit high levels of IFN-alpha/beta to negatively regulate it. The endogenous factors promoting virus-induced T cell IFN-gamma production were defined in studies evaluating CD8 T cell responses during lymphocytic choriomeningitis virus infections of mice. Two divergent supporting pathways were characterized. Under normal conditions of infections, the CD8 T cell IFN-gamma response was dependent on endogenous IFN-alpha/beta effects, but was IL-12 independent. In contrast, in the absence of IFN-alpha/beta functions, an IL-12 response was revealed and substituted an alternative pathway to IFN-gamma. IFN-alpha/beta-mediated effects resulted in enhanced, but the alternative pathway also promoted, resistance to infection. These observations define uniquely important IFN-alpha/beta-controlled pathways shaping T cell responses during viral infections, and demonstrate plasticity of immune responses in accessing divergent innate mechanisms to achieve similar ultimate goals." @default.
- W1994310347 created "2016-06-24" @default.
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- W1994310347 date "1999-04-19" @default.
- W1994310347 modified "2023-09-24" @default.
- W1994310347 title "Two Roads Diverged: Interferon α/β– and Interleukin 12–mediated Pathways in Promoting T Cell Interferon γ Responses during Viral Infection" @default.
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- W1994310347 doi "https://doi.org/10.1084/jem.189.8.1315" @default.
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