کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2512719 1118372 2012 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A conserved antioxidant response element (ARE) in the promoter of human carbonyl reductase 3 (CBR3) mediates induction by the master redox switch Nrf2
موضوعات مرتبط
علوم پزشکی و سلامت داروسازی، سم شناسی و علوم دارویی داروشناسی
پیش نمایش صفحه اول مقاله
A conserved antioxidant response element (ARE) in the promoter of human carbonyl reductase 3 (CBR3) mediates induction by the master redox switch Nrf2
چکیده انگلیسی

Carbonyl reductase activity catalyzes the two electron reduction of several endogenous and exogenous carbonyl substrates. Recent data indicate that the expression of human carbonyl reductase 3 (CBR3) is regulated by the master redox switch Nrf2. Nrf2 binds to conserved antioxidant response elements (AREs) in the promoters of target genes. The presence of functional AREs in the CBR3 promoter has not yet been reported. In this study, experiments with reporter constructs showed that the prototypical Nrf2 activator tert-butyl hydroquinone (t-BHQ) induces CBR3 promoter activity in cultures of HepG2 (2.7-fold; p < 0.05) and MCF-7 cells (22-fold; p < 0.01). Computational searches identified a conserved ARE in the distal CBR3 promoter region (−2698ARE). Deletion of this ARE from a 4212-bp CBR3 promoter construct impacted basal promoter activity and induction of promoter activity in response to treatment with t-BHQ. Deletion of −2698ARE also impacted the induction of CBR3 promoter activity in cells overexpressing Nrf2. Electrophoretic mobility shift assays (EMSA) demonstrated increased binding of specific protein complexes to −2698ARE in nuclear extracts from t-BHQ treated cells. The presence of Nrf2 in the specific nuclear protein–−2698ARE complexes was evidenced in EMSA experiments with anti-Nrf2 antibodies. These data suggest that the distal −2698ARE mediates the induction of human CBR3 in response to prototypical activators of Nrf2.

A conserved antioxidant response element (−2698ARE) in the promoter of human carbonyl reductase 3 (CBR3) mediates gene induction via the master redox switch Nrf2.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Pharmacology - Volume 83, Issue 1, 1 January 2012, Pages 139–148
نویسندگان
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