GITRL modulates the activities of p38 MAPK and STAT3 to promote Th17 cell differentiation in autoimmune arthritis.
Oncotarget
; 7(8): 8590-600, 2016 Feb 23.
Article
em En
| MEDLINE
| ID: mdl-26657118
ABSTRACT
The glucocorticoid-induced TNFR family-related protein (GITR) and its ligand play a critical role in the pathogenesis of autoimmune arthritis by enhancing the Th17 cell response, but their molecular mechanisms remain largely unclear. This study aims to define the role of p38 mitogen-activated protein kinases (MAPK) and signal transducer and activator of transcription 3 (STAT3) signaling in GITRL-induced Th17 cells in autoimmune arthritis. We found that the p38 phosphorylation was enhanced by GITRL in activated CD4+T cells, and the p38 inhibitor restrained the GITRL-induced Th17 cell expansion in a dose-dependent manner. Moreover, there was decreased STAT3 activity on Tyr705 and Ser727 with the p38 inhibitor in vitro. Notably, the p38 inhibitor could prevent GITRL-treated arthritis progression and markedly decrease the Th17 cell percentages. The phosphorylation of the Tyr705 site was significantly lower in the GITRL-treated CIA mice administrated with the p38 inhibitor. A significantly higher phosphorylation of p38 was detected in RA patients and had a positive relationship with the serum level of anti-cyclic citrullinated peptide (anti-CCP) antibody. Our findings have indicated that GITRL could promote Th17 cell differentiation by p38 MAPK and STAT3 signaling in autoimmune arthritis.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Medicinas Complementares:
Homeopatia
Assunto principal:
Artrite
/
Doenças Autoimunes
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Diferenciação Celular
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Proteínas Quinases p38 Ativadas por Mitógeno
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Fatores de Necrose Tumoral
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Fator de Transcrição STAT3
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Células Th17
Tipo de estudo:
Observational_studies
Idioma:
En
Revista:
Oncotarget
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
China