alexa Activation of nuclear factor kappa B inflammatory bowel disease.
Immunology

Immunology

International Journal of Inflammation, Cancer and Integrative Therapy

Author(s): Schreiber S, Nikolaus S, Hampe J

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Abstract BACKGROUND: Expression of pro-inflammatory cytokines is increased in the intestinal lamina propria of patients with inflammatory bowel disease (IBD). Nuclear factor kappa B (NF kappa B) controls transcription of inflammation genes. On activation, NF kappa B is rapidly released from its cytoplasmic inhibitor (I kappa B), transmigrates into the nucleus, and binds to DNA response elements in gene promoter regions. AIMS: To investigate whether increased activation of NF kappa B is important in IBD and may be down-regulated by anti-inflammatory treatment. METHODS: Activation of NF kappa B was determined by western blot assessment and electrophoretic mobility shift assay in nuclear extracts of colonic biopsy samples as well as lamina propria mononuclear cells. RESULTS: Nuclear levels of NF kappa B p65 are increased in lamina propria biopsy specimens from patients with Crohn's disease in comparison with patients with ulcerative colitis and controls. Increased activation of NF kappa B was detected in lamina propria mononuclear cells from patients with active IBD. Corticosteroids strongly inhibit intestinal NF kappa B activation in IBD in vivo and in vitro by stabilising the cytosolic inhibitor I kappa B alpha against activation induced degradation. CONCLUSIONS: In both IBDs, but particularly Crohn's disease, increased activation of NF kappa B may be involved in the regulation of the inflammatory response. Inhibition of NF kappa B activation may represent a mechanism by which steroids exert an anti-inflammatory effect in IBD.
This article was published in Gut and referenced in International Journal of Inflammation, Cancer and Integrative Therapy

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