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• W2106870605 abstract "Chronic infections with viruses such as hepatitis B virus, hepatitis C virus, and HIV constitute a major global public health problem. Studies of chronic viral infections in humans and mice show that persistent antigenic stimulation induces dysregulation of T cell responses; virus-specific T cells either undergo clonal deletion or lose their ability to display the full spectrum of effector functions, a condition termed functional exhaustion. The ability to generate and retain sufficient numbers of functionally competent T cells, therefore, becomes vitally important in controlling chronic viral infections. Our understanding of the mechanisms governing T cell homeostasis during chronic viral infections, however, is poor. The phosphatidylinositol 3-kinase (PI3K)/Akt signaling pathway controls cell fate decisions in many cell types by modulating the activity of downstream effectors, including the FOXO family of transcription factors. We have observed dynamic, in vivo alterations in the phosphorylation levels of three key proteins (Akt, FOXO1/FOXO3 [FOXO1/3], and mammalian target of rapamycin [mTOR]) involved in this signaling cascade and have identified the transcription factor FOXO3 as a negative regulator of the magnitude and effector function of CD8 T cells during chronic lymphocytic choriomeningitis virus (LCMV) infection in mice. We report that ablation of FOXO3 in T cells reduced apoptosis, increased the abundance of polyfunctional virus-specific CD8 T cells, and improved viral control. Thus, FOXO3 is a promising candidate target for immunotherapies of chronic viral infection." @default.
• W2106870605 created "2016-06-24" @default.
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• W2106870605 date "2012-09-01" @default.
• W2106870605 modified "2023-10-18" @default.
• W2106870605 title "FOXO3 Regulates the CD8 T Cell Response to a Chronic Viral Infection" @default.
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• W2106870605 doi "https://doi.org/10.1128/jvi.00942-12" @default.
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