During various inflammatory processes circulating cytokines including IL-6, IL-1xcexb2, and TNFxcexb1 elicit a broad and clinically relevant impairment of hepatic detoxification that is based on the simultaneous downregulation of many drug metabolizing enzymes and transporter genes. To address the question whether a common mechanism is involved we treated human primary hepatocytes with IL-6, the major mediator of the acute phase response in liver, and characterized acute phase and detoxification responses in quantitative gene expression and (phospho-)proteomics data sets. Selective inhibitors were used to disentangle the roles of JAK/STAT, MAPK, and PI3K signaling pathways. A prior knowledge-based fuzzy logic model comprising signal transduction and gene regulation was established and trained with perturbation-derived gene expression data from five hepatocyte donors. Our model suggests a greater role of MAPK/PI3K compared to JAK/STAT with the orphan nuclear receptor RXRxcexb1 playing a central role in mediating transcriptional downregulation. Validation experiments revealed a striking similarity of RXRxcexb1 gene silencing versus IL-6 induced negative gene regulation (rs = 0.79, P<0.0001). These results concur with RXRxcexb1 functioning as obligatory heterodimerization partner for several nuclear receptors that regulate drug and lipid metabolism. 