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- W4313354956 abstract "Abstract Calpain enzymes proteolytically modulate cellular function and have been implicated in inflammatory diseases. In this study, we found that calpain levels did not differ between intestinal tissues from inflammatory bowel disease (IBD) patients and healthy controls, but IBD tissues showed increased levels of the endogenous calpain inhibitor, calpastatin (CAST). To investigate the role of CAST in the immune system during IBD, mice were x-ray irradiated and reconstituted with either CAST knockout (KO) or wild-type (WT) bone marrow and subjected to dextran sulfate sodium (DSS)-induced colitis. CAST KO recipients with induced colitis exhibited more severe weight loss, bloody diarrhea, and anemia compared to WT controls. Histological evaluation of colons from KO recipients with colitis revealed increased inflammatory pathology. Macrophages purified from the colons of KO recipients had higher IL-6, TNFα, and IFNγ mRNA levels compared to WT controls. Mechanistic investigations using siRNA and KO bone marrow to generate CAST deficient macrophages showed that CAST deficiency during activation with bacterial PAMPs including heat-killed E. faecalis or CpG DNA led to increased IκB cleavage, NF-κB nuclear localization, and IL-6 and TNFα secretion. Thus, CAST plays a central role in regulating macrophage activation and limiting pathology during inflammatory disorders like IBD." @default.
- W4313354956 created "2023-01-06" @default.
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- W4313354956 date "2013-05-01" @default.
- W4313354956 modified "2023-10-14" @default.
- W4313354956 title "Calpastatin prevents NF-κB mediated hyperactivation of macrophages and attenuates colitis (P3151)" @default.
- W4313354956 doi "https://doi.org/10.4049/jimmunol.190.supp.43.37" @default.
- W4313354956 hasPublicationYear "2013" @default.
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