MCC950, a specific small molecule inhibitor of NLRP3 inflammasome attenuates colonic inflammation in spontaneous colitis mice.
Agampodi Promoda PereraRuchira FernandoTanvi ShindeRohit GundamarajuBenjamin SouthamSukhwinder Singh SohalAvril A B RobertsonKate SchroderDale KundeRajaraman D EriPublished in: Scientific reports (2018)
MCC950 a potent, highly specific small molecule inhibitor of canonical and noncanonical activation of NLRP3 inflammasome has been evaluated in a multitude of NLRP3 driven inflammatory diseases. However, the effect of MCC950 on colonic inflammation has not yet been reported. In the present study we investigated the effect of MCC950 in a spontaneous chronic colitis mouse model Winnie, which mimics human ulcerative colitis. Oral administration of 40 mg/kg MCC950 commencing at Winnie week seven for three weeks significantly improved body weight gain, colon length, colon weight to body weight ratio, disease activity index and histopathological scores. MCC950 significantly suppressed release of proinflammatory cytokines IL-1β, IL-18, IL1-α, IFNγ, TNF-α, IL6, IL17, chemokine MIP1a and Nitric Oxide in colonic explants. Moreover, MCC950 resulted in a significant decrease of IL-1β release and activation of caspase-1 in colonic explants and macrophage cells isolated from Winnie. Complete inhibition with MCC950 in Winnie colonic explants shows, for the first time, the contribution of inflammatory effects resulting exclusively from canonical and noncanonical NLRP3 inflammasome activation in colitis. Taken together, our results illustrate the efficacy of MCC950 in the treatment of murine ulcerative colitis and provides avenue for a potential novel therapeutic agent for human inflammatory bowel diseases.
Keyphrases
- ulcerative colitis
- nlrp inflammasome
- small molecule
- weight gain
- rheumatoid arthritis
- disease activity
- oxidative stress
- nitric oxide
- body weight
- body mass index
- induced apoptosis
- endothelial cells
- mouse model
- systemic lupus erythematosus
- adipose tissue
- dendritic cells
- cell death
- climate change
- cell proliferation
- clinical trial
- combination therapy
- induced pluripotent stem cells
- cell cycle arrest
- atomic force microscopy
- gestational age
- smoking cessation
- replacement therapy
- placebo controlled