scholarly journals Protein Kinase CK2 Controls the Fate between Th17 Cell and Regulatory T Cell Differentiation

2017 ◽  
Vol 198 (11) ◽  
pp. 4244-4254 ◽  
Author(s):  
Sara A. Gibson ◽  
Wei Yang ◽  
Zhaoqi Yan ◽  
Yudong Liu ◽  
Amber L. Rowse ◽  
...  
2015 ◽  
Vol 195 (9) ◽  
pp. 4154-4161 ◽  
Author(s):  
Ruan Zhang ◽  
Christopher M. Borges ◽  
Martin Y. Fan ◽  
John E. Harris ◽  
Laurence A. Turka

2020 ◽  
Vol 117 (24) ◽  
pp. 13740-13749 ◽  
Author(s):  
Yusuke Higuchi ◽  
Jun-ichirou Yasunaga ◽  
Yu Mitagami ◽  
Hirotake Tsukamoto ◽  
Kazutaka Nakashima ◽  
...  

Human T cell leukemia virus type 1 (HTLV-1) is the etiologic agent of a T cell neoplasm and several inflammatory diseases. A viral gene, HTLV-1 bZIP factor (HBZ), induces pathogenic Foxp3-expressing T cells and triggers systemic inflammation and T cell lymphoma in transgenic mice, indicating its significance in HTLV-1–associated diseases. Here we show that, unexpectedly, a proinflammatory cytokine, IL-6, counteracts HBZ-mediated pathogenesis. Loss of IL-6 accelerates inflammation and lymphomagenesis in HBZ transgenic mice. IL-6 innately inhibits regulatory T cell differentiation, suggesting that IL-6 functions as a suppressor against HBZ-associated complications. HBZ up-regulates expression of the immunosuppressive cytokine IL-10. IL-10 promotes T cell proliferation only in the presence of HBZ. As a mechanism of growth promotion by IL-10, HBZ interacts with STAT1 and STAT3 and modulates the IL-10/JAK/STAT signaling pathway. These findings suggest that HTLV-1 promotes the proliferation of infected T cells by hijacking the machinery of regulatory T cell differentiation. IL-10 induced by HBZ likely suppresses the host immune response and concurrently promotes the proliferation of HTLV-1 infected T cells.


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