TGF-ß-induced phosphorylation of Akt and Foxo transcription factors negatively regulates induced regulatory T cell differentiation.
Biochem Biophys Res Commun
; 480(1): 114-119, 2016 Nov 04.
Article
em En
| MEDLINE
| ID: mdl-27697523
Transforming growth factor-ß (TGF-ß) is a pivotal cytokine in the differentiation of regulatory T cells, and Foxo transcription factors positively regulate this process. On the other hand, the function of Foxo transcription factors is negatively regulated by PI3K/Akt signaling, which is activated by TGF-ß in many types of cells; yet the role of TGF-ß in Akt activity and its downstream substrates in CD4+ T cells, including Foxo transcription factors, remains to be determined. Herein, we demonstrate that TGF-ß selectively induces Akt phosphorylation at Ser473 but not at Thr308 in a class IA PI3K-dependent manner in CD4+ T cells, resulting in the phosphorylation and inhibition of Foxo transcription factors and negatively regulating the differentiation of induced regulatory T cells (iTregs). These observations reveal a novel negative regulatory mechanism involving Akt and Foxo transcription factors induced by TGF-ß in the iTreg differentiation process.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fator de Crescimento Transformador beta
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Linfócitos T Reguladores
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Proteínas Proto-Oncogênicas c-akt
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Proteína Forkhead Box O1
Limite:
Animals
Idioma:
En
Revista:
Biochem Biophys Res Commun
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Japão