Abstract:
:We have recently demonstrated that unconjugated bilirubin (UCB) limits the overexpression of adhesion molecules and inhibits the PMN endothelial adhesion induced by the pro-inflammatory cytokine TNFalpha. To understand the molecular events involved we investigated whether the inhibitory effect is determined by a direct influence of UCB on different nuclear pathways. Co-treatment of cells with UCB, TNFalpha, and pyrridoline dithiocarbamate (PDTC), a NF-kappaB inhibitor, additively enhanced the inhibitory effect of UCB. UCB prevented the nuclear translocation of NF-kappaB induced by TNFalpha. The failure of UCB to alter TNFalpha-induced phosphorylation of cAMP-response element-binding protein (CREB) suggested that the CREB pathway is not involved in the UCB inhibition and that UCB blunting effect on the overexpression of adhesion molecules occurs via inhibition of the NF-kappaB transduction pathway. Collectively these data may contribute to explain the protective effect of bilirubin against development of atherosclerosis.
journal_name
Biosci Trendsjournal_title
Bioscience trendsauthors
Mazzone GL,Rigato I,Ostrow JD,Tiribelli Csubject
Has Abstractpub_date
2009-08-01 00:00:00pages
151-7issue
4eissn
1881-7815issn
1881-7823journal_volume
3pub_type
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