Phosphatase PP2A is essential for T <subscript>H</subscript> 17 differentiation.
In: Proceedings of the National Academy of Sciences of the United States of America, Jg. 116 (2019-01-15), Heft 3, S. 982-987
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Zugriff:
Phosphatase PP2A expression levels are positively correlated to the clinical severity of systemic lupus erythematosus (SLE) and IL17A cytokine overproduction, indicating a potential role of PP2A in controlling T H 17 differentiation and inflammation. By generating a mouse strain with ablation of the catalytic subunit α of PP2A in peripheral mature T cells (PP2A cKO), we demonstrate that the PP2A complex is essential for T H 17 differentiation. These PP2A cKO mice had reduced T H 17 cell numbers and less severe disease in an experimental autoimmune encephalomyelitis (EAE) model. PP2A deficiency also ablated C-terminal phosphorylation of SMAD2 but increased C-terminal phosphorylation of SMAD3. By regulating the activity of RORγt via binding, the changes in the phosphorylation status of these R-SMADs reduced Il17a gene transcription. Finally, PP2A inhibitors showed similar effects on T H 17 cells as were observed in PP2A cKO mice, i.e., decreased T H 17 differentiation and relative protection of mice from EAE. Taken together, these data demonstrate that phosphatase PP2A is essential for T H 17 differentiation and that inhibition of PP2A could be a possible therapeutic approach to controlling T H 17-driven autoimmune diseases.
Competing Interests: The authors declare no conflict of interest.
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Phosphatase PP2A is essential for T <subscript>H</subscript> 17 differentiation.
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Autor/in / Beteiligte Person: | Xu, Q ; Jin, X ; Zheng, M ; Rohila, D ; Fu, G ; Wen, Z ; Lou, J ; Wu, S ; Sloan, R ; Wang, L ; Hu, H ; Gao, X ; Lu, L |
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Zeitschrift: | Proceedings of the National Academy of Sciences of the United States of America, Jg. 116 (2019-01-15), Heft 3, S. 982-987 |
Veröffentlichung: | Washington, DC : National Academy of Sciences, 2019 |
Medientyp: | academicJournal |
ISSN: | 1091-6490 (electronic) |
DOI: | 10.1073/pnas.1807484116 |
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