Carbonyl reductase 1 catalyzes 20β-reduction of glucocorticoids, modulating receptor activation and metabolic complications of obesity.

Carbonyl reductase 1 catalyzes 20β-reduction of glucocorticoids, modulating receptor activation and metabolic complications of obesity.
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DOI:
10.1038/s41598-017-10410-1
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发表时间:
2017-09-06
期刊:
影响因子:
4.6
通讯作者:
Walker BR
Walker BR
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Morgan RA;Beck KR;Nixon M;Homer NZM;Crawford AA;Melchers D;Houtman R;Meijer OC;Stomby A;Anderson AJ;Upreti R;Stimson RH;Olsson T;Michoel T;Cohain A;Ruusalepp A;Schadt EE;Björkegren JLM;Andrew R;Kenyon CJ;Hadoke PWF;Odermatt A;Keen JA;Walker BR

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羰基还原酶1(CBR 1)是一种广泛表达的细胞溶质酶,在外源性药物代谢中起重要作用,但其生理功能尚不清楚。在这里,我们描述了CBR 1在糖皮质激素代谢中的作用。CBR 1催化由皮质醇产生20β-二氢皮质醇(20β-DHF)的NADPH依赖性。CBR 1提供马皮质醇代谢的主要途径,并在马、人和小鼠肥胖症的脂肪组织中上调。我们证明20β-DHF是人糖皮质激素受体(GR)的弱内源性激动剂。CBR 1在小鼠饮食诱导的肥胖中的药理学抑制导致更显著的葡萄糖耐受不良,有证据表明肝脏GR信号传导增强。这些发现表明,CBR 1产生20β-二氢皮质醇是一种新的途径,调节GR激活,并提供酶保护,防止过度的GR激活肥胖。
Carbonyl Reductase 1 (CBR1) is a ubiquitously expressed cytosolic enzyme important in exogenous drug metabolism but the physiological function of which is unknown. Here, we describe a role for CBR1 in metabolism of glucocorticoids. CBR1 catalyzes the NADPH- dependent production of 20β-dihydrocortisol (20β-DHF) from cortisol. CBR1 provides the major route of cortisol metabolism in horses and is up-regulated in adipose tissue in obesity in horses, humans and mice. We demonstrate that 20β-DHF is a weak endogenous agonist of the human glucocorticoid receptor (GR). Pharmacological inhibition of CBR1 in diet-induced obesity in mice results in more marked glucose intolerance with evidence for enhanced hepatic GR signaling. These findings suggest that CBR1 generating 20β-dihydrocortisol is a novel pathway modulating GR activation and providing enzymatic protection against excessive GR activation in obesity.
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