In transient transfection assays performed in human hepatoma HepG2 cells, NR1H3 (LXR alpha) was found to interact with the nuclear receptor corepressor (NCOR) and nuclear receptor coactivator 1 (NCOA1 or SRC1) to regulate the UGT1A3 gene promoter (Verreault M et al. 2006). In the unliganded state, LXR:RXR heterodimers are bound to DNA response elements in association with co-repressor complexes resulting in repression of target genes (Wagner BL et al. 2003). Ligand binding to LXR induces conformational changes leading to release of co-repressor complexes and recruitment of co-activator complexes and transcription of target genes.
Kaeding, J, Verreault, M, Trottier, J, Caron, P, Staels, B, Tukey, RH, Bonzo, JA, Bélanger, J, Barbier, O, Senekeo-Effenberger, K
Jakobsson, T, Gustafsson, JA, Steffensen, KR, Treuter, E
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