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  • Title: Involvement of RelB in aryl hydrocarbon receptor-mediated induction of chemokines.
    Author: Vogel CF, Sciullo E, Matsumura F.
    Journal: Biochem Biophys Res Commun; 2007 Nov 23; 363(3):722-6. PubMed ID: 17900530.
    Abstract:
    2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a well-known immunotoxic compound affecting the expression of inflammatory genes. We found that TCDD induces the expression of the B-cell activating factor of the tumor necrosis factor family (BAFF), B-lymphocyte chemoattractant (BLC), CC-chemokine ligand 1 (CCL1), and the transcription factor interferon gamma responsive factor (IFR3) in U937 macrophages in an aryl hydrocarbon receptor- (AhR) and RelB-dependent manner. The induction was associated with increased binding activity of an AhR/RelB complex without participation of ARNT to a NF-kappaB element that is recognized by the NF-kappaB subunit RelB and localized on promoters of the cytokine and chemokine genes BAFF, BLC, CCL1, and the transcription factor IRF3. The interaction of AhR with RelB binding on a novel type of NF-kappaB binding site represents a new regulatory function of the AhR.
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