NF-κB-mediated regulation of rat CYP2E1 by two independent signaling pathways

Autoři: Qin Lin aff001;  Xiaolin Kang aff001;  Xuefeng Li aff001;  Tao Wang aff001;  Fengting Liu aff001;  Jinxue Jia aff001;  Ziqi Jin aff001;  Yongzhi Xue aff001
Působiště autorů: Institute of Pharmacokinetics and Liver Molecular Pharmacology, Department of Pharmacology, Baotou Medical College, Baotou, Inner Mongolia, China aff001
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article


Cytochrome P450 2E1 (CYP2E1) plays an important role in both alcohol-induced and immune-mediated liver injury. However, the mechanism underlying CYP2E1 transcriptional regulation has not been clarified. This study focused on the NF-κB-mediated transcriptional regulation of rat CYP2E1 by two independent signaling pathways in alcohol-induced and immune-mediated liver injury rat models. Male Sprague-Dawley rats were used in pharmacokinetic, molecular pharmacology, and morphology experiments. A rat model of alcohol-induced liver injury (AL) was established by feeding an ethanol-containing diet (42 g/kg/day) for 5 weeks as indicated. A rat immune-mediated liver injury (IM) model was established by the sequential injection of bacillus Calmette-Guérin (BCG, 125 mg/kg, once) via the tail vein after test day 21 and 10 μg/kg LPS 13 days later. HPLC, real-time PCR, western blot and ELISA analyses were performed. CYP2E1 expression was enhanced during the process of alcohol-induced liver injury (increased by 56%, P < 0.05) and significantly reduced during that of immune-mediated liver injury (reducedby52%, P < 0.05). NF-κB was activated in both the AL and IM groups (increased by 56% and76%, respectively, P < 0.05). Compared to those in the livers of AL model rats, the interleukin (IL)-1β, tumor necrosis factor (TNF)-α, and iNOS levels in IM model rat livers were increased (increased by 26%, 21% and 101%, respectively, P < 0.05). The differential changes in CYP2E1 in the processes of alcohol-induced and immune-mediated liver injury may result from the differential expression of inflammatory cytokines and iNOS after NF-κB activation, leading to the NF-κB-mediated transcriptional regulation of rat CYP2E1 by two independent signaling pathways.

Klíčová slova:

Analysis of variance – Blood plasma – Cytokines – Drug metabolism – Enzyme-linked immunoassays – Fatty liver – Inflammation – Transcriptional control


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