IL-1 receptor-associated kinase M downregulates DSS-induced colitis.
Inflamm Bowel Dis
; 16(10): 1778-86, 2010 Oct.
Article
en En
| MEDLINE
| ID: mdl-20848470
ABSTRACT
BACKGROUND:
Ulcerative colitis is associated with increased colon permeability resulting in bacterial translocation into the lamina propria. We investigate the importance of the Toll-like receptor (TLR) regulating protein IL-1 receptor-associated kinase M (IRAK-M) using the erosive dextran sulfate sodium (DSS)-induced model of colitis.METHODS:
IRAK-M-competent and -incompetent mice were treated with 3% DSS for 5 days followed by 2 days of regular drinking water. Clinical signs of disease were followed for 7 days. At day 7 the mice were sacrificed and plasma and tissue were collected for histopathological examination and analyses of the production of cytokines and chemokines as well as expression of T-cell transcription factors.RESULTS:
At day 7 IRAK-M-deficient mice display a reduced total body weight (77.1 ± 2.1 versus 88.5 ± 2.0, *P = 0.002) and an increased macroscopical (2.7 ± 0.2 versus 1.6 ± 0.1, *P = 0.002) and histopathological (6.0 ± 0 versus 3.3 ± 0.5, *P = < 0.001) colon score compared to wildtype mice. Furthermore, IRAK-M-deficient mice have increased colon mRNA expression of proinflammatory cytokines and increased tumor necrosis factor concentrations (41.1 ± 13.5 versus 12.8 ± 2.0 pg/mL, *P = 0.010) in plasma.CONCLUSIONS:
This is the first report examining the role of IRAK-M in colitis. We find that IRAK-M is of critical importance in downregulating induction and progression of DSS colitis, and thereby suggesting that IRAK-M might be a target for future interventional therapies.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Sulfato de Dextran
/
Colitis
/
Modelos Animales de Enfermedad
/
Quinasas Asociadas a Receptores de Interleucina-1
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Animals
Idioma:
En
Revista:
Inflamm Bowel Dis
Asunto de la revista:
GASTROENTEROLOGIA
Año:
2010
Tipo del documento:
Article
País de afiliación:
Suecia