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PXR |
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We found that certain highly chlorinated PCBs are potent activators of rodent PXR but antagonize its human ortholog, the steroid and xenobiotic receptor (SXR), inhibiting target gene induction. The scientists discovered that the most stable and abundant PCBs found in human tissues activated PXR and induced expression of target genes for metabolizing the toxicants, producing a protective physiological reaction in rodents. |
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