Abstract
Activation of certain cytokines and adhesion molecules has been postulated being involved in the pathogenesis of experimental and human glomerulonephritis. In this study, we examined whether the transcription factor, nuclear factor kappaB (NFkappaB), mediated the expression of these genes involved with the inflammatory response of mesangial cells by using transcription factor decoy oligodeoxynucleotides (ODN) to block NFkappaB binding to the promoter site of its target genes. We hypothesized that the NFkappaB decoy ODN can inhibit the coordinated activation of cytokines and adhesion molecules induced by TNF-alpha. Increased binding activity of NFkappaB induced by TNF-alpha was effectively blocked by the NFkappaB decoy ODN. TNF-alpha stimulated CAT expression, which was significantly inhibited by transfection of NFkappaB, but not by scrambled decoy ODN. Of importance, NFkappaB, but not scrambled decoy ODN, significantly attenuated the increase in RNA and protein levels of IL-1alpha, IL-1beta, IL-6, ICAM-1 and VCAM-1 induced by TNF-alpha assessed by RT-PCR. Moreover, in vivo transfection of NFkappaB decoy ODN inhibited expressions of these cytokines and adhesion molecules induced by TNF-alpha injection. These results suggest a no...Continue Reading
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