Bay 11-7082

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Description

Bay 11-7082 (Bay 11-7821) is an irreversible inhibitor of TNF-α-stimulated IκBα phosphorylation. Bay 11-7082 selectively and irreversibly inhibits NF-κB activation by blocking TNF-α-induced phosphorylation of IκB-α without affecting constitutive IκB-α phosphorylation. Bay 11-7082 inhibits the TNF-α-induced surface expression of adhesion molecules ICAM-1, VCAM-1, and E-selectin in human endothelial cells with IC50 values of 5-10 µM. Bay 11-7082 also reversibly activates MAP kinases and stimulates apoptosis. Bay 11-7082 rapidly and efficiently reduced the DNA binding of NF-kappaB in HTLV-I-infected T-cell lines and down-regulated the expression of the antiapoptotic gene, Bcl-x(L), regulated by NF-kappaB, whereas it had little effect on the DNA binding of another transcription factor, AP-1. Furthermore, Bay 11-7082- induced apoptosis of primary ATL cells was more prominent than that of normal peripheral blood mononuclear cells, and apoptosis of these cells was also associated with down-regulation of NF-kappaB activity.

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