GLP-2 suppresses LPS-induced inflammation in macrophages by inhibiting ERK phosphorylation and NF-κB activation.
Cell Physiol Biochem
; 34(2): 590-602, 2014.
Article
en En
| MEDLINE
| ID: mdl-25116357
ABSTRACT
BACKGROUND/AIMS:
GLP-2 has been shown to exert anti-inflammatory effects, but the underlying molecular mechanisms remained undefined. As macrophages are important in the development and maintenance of inflammation, we investigated whether exogenous GLP-2 modulates the expression of pro-inflammatory proteins in LPS stimulated murine peritoneal macrophages.METHODS:
Macrophages were pretreated with various concentrations of GLP-2 for 1 h and then stimulated with LPS. The effects on pro-inflammatory enzymes (iNOS and COX-2), and pro-inflammatory cytokines (TNF-α, IL-1ß and IL-6) were analysed by Western blotting, ELISA and qRT-PCR. We also examined whether NF-κB or MAPK signaling was involved in the effects of GLP-2.RESULTS:
In macrophages, GLP-2 blunted the effect of LPS on protein and mRNA expression levels of iNOS, COX-2, TNF-α, IL-1ß and IL-6. Pre-incubation of macrophages with GLP-2 also blunted LPS-induced IκB-α degradation, IκB-α phosphorylation and NF-κB translocation. In the presence of GLP-2, the effect of LPS treatment on ERK phosphorylation was also profoundly blunted. GLP-2 did, however, not significantly modify the effects of LPS on p38 and JNK activities.CONCLUSIONS:
These findings demonstrate that in LPS primed macrophages, GLP-2 reduced pro-inflammatory enzymes and cytokine production via mechanisms involving the suppression of NF-κB activity and ERK phosphorylation.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Lipopolisacáridos
/
FN-kappa B
/
Macrófagos Peritoneales
/
Quinasas MAP Reguladas por Señal Extracelular
/
Péptido 2 Similar al Glucagón
/
Inflamación
Límite:
Animals
Idioma:
En
Revista:
Cell Physiol Biochem
Asunto de la revista:
BIOQUIMICA
/
FARMACOLOGIA
Año:
2014
Tipo del documento:
Article