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β-隐黄质通过调节啮齿动物高脂饮食诱导的胰岛素抵抗中的NF-κB和Nrf2信号通路来改善代谢危险因素。

β-Cryptoxanthin ameliorates metabolic risk factors by regulating NF-κB and Nrf2 pathways in insulin resistance induced by high-fat diet in rodents.

作者信息

Sahin Kazim, Orhan Cemal, Akdemir Fatih, Tuzcu Mehmet, Sahin Nurhan, Yılmaz Ismet, Juturu Vijaya

机构信息

Firat University, Department of Animal Nutrition, Elazig, Turkey.

Firat University, Department of Animal Nutrition, Elazig, Turkey.

出版信息

Food Chem Toxicol. 2017 Sep;107(Pt A):270-279. doi: 10.1016/j.fct.2017.07.008. Epub 2017 Jul 6.

Abstract

The aim of this experiment was to determine the effects of β-cryptoxanthin (BCX) on the cardiometabolic health risk factors and NF-κB and Nrf2 pathway in insulin resistance induced by high-fat diet (HFD) in rodents. Twenty-eight Sprague-Dawley rats were allocated into four groups: (1) Control, rats fed a standard diet for 12 weeks; (2) BCX, rats fed a standard diet and supplemented with BCX (2.5 mg/kg BW) for 12 weeks; (3) HFD, rats fed a HFD for 12 weeks, (4) HFD + BCX, rats fed a HFD and supplemented with BCX for 12 weeks. BCX reduced cardio-metabolic health markers and decreased inflammatory markers (P < 0.001). Rats fed a HFD had the lower total antioxidant capacity and antioxidant enzymes activities and higher MDA concentration than control rats (P < 0.001 for all). Comparing with the HFD group, BCX in combination with HFD inhibited liver NF-κB and TNF-α expression by 22% and 14% and enhanced liver Nrf2, HO-1, PPAR-α, and p-IRS-1 by 1.43, 1.41, 3.53, and 1.33 fold, respectively (P < 0.001). Furthermore, in adipose tissue, BCX up-regulated Nrf2, HO-1, PPAR-α, and p-IRS-1 expression, whereas, down-regulated NF-κB and TNF-α expression. In conclusion, BCX decreased visceral fat and cardiometabolic health risk factors through modulating expressions of nuclear transcription factors.

摘要

本实验的目的是确定β-隐黄质(BCX)对高脂饮食(HFD)诱导的啮齿动物胰岛素抵抗中心血管代谢健康风险因素以及NF-κB和Nrf2信号通路的影响。28只Sprague-Dawley大鼠被分为四组:(1)对照组,大鼠喂食标准饮食12周;(2)BCX组,大鼠喂食标准饮食并补充BCX(2.5毫克/千克体重)12周;(3)HFD组,大鼠喂食HFD 12周;(4)HFD + BCX组,大鼠喂食HFD并补充BCX 12周。BCX降低了心血管代谢健康指标并减少了炎症指标(P < 0.001)。与对照组大鼠相比,喂食HFD的大鼠总抗氧化能力和抗氧化酶活性较低,丙二醛浓度较高(所有P < 0.001)。与HFD组相比,BCX与HFD联合使用可使肝脏NF-κB和TNF-α表达分别抑制22%和14%,并使肝脏Nrf2、HO-1、PPAR-α和p-IRS-1分别增加1.43、1.41、3.53和1.33倍(P < 0.001)。此外,在脂肪组织中,BCX上调了Nrf2、HO-1、PPAR-α和p-IRS-1的表达,而下调了NF-κB和TNF-α的表达。总之,BCX通过调节核转录因子的表达降低了内脏脂肪和心血管代谢健康风险因素。

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