PPAR-gamma agonist inhibits Ang II-induced activation of dendritic cells via the MAPK and NF-kappaB pathways.
Immunol Cell Biol
; 88(3): 305-12, 2010.
Article
em En
| MEDLINE
| ID: mdl-19997078
ABSTRACT
The renin-angiotensin system exerts a profound regulatory effect on the functional features of dendritic cells (DCs), thus suggesting a new target of angiotensin II (Ang II) action in the immune system. This study analyzed whether peroxisome proliferator-activated receptor-gamma (PPAR-gamma) activation in DCs regulated Ang II-induced activation of DCs and exploited the possible molecular mechanisms, especially focused on the signaling pathways of mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-kappaB). Ang II stimulation of human monocyte-derived DCs resulted in an intermediate state of DC maturation and function via modulating the balance of the negative or positive regulation of the signaling pathways of extracellular regulated kinase (ERK), p38 MAPK and NF-kappaB, but not c-Jun N-terminal kinase (JNK). Moreover, pretreatment of DCs with the PPAR-gamma agonist pioglitazone reverted these effects of Ang II on DCs via suppression of the MAPK and NF-kappaB signaling pathways at least in part. Collectively, our data support the notion that PPAR-gamma activation in human DCs inhibits the activation of DCs induced by Ang II, with which involves the regulation of MAPK and NF-kappaB signaling pathways. These findings may support the important role of these mediators in the regulation of DC-mediated inflammatory and immunologic processes.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células Dendríticas
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Angiotensina II
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Monócitos
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NF-kappa B
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Sistema de Sinalização das MAP Quinases
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Tiazolidinedionas
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PPAR gama
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Hipoglicemiantes
Limite:
Humans
Idioma:
En
Revista:
Immunol Cell Biol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
China