Hydroxytyrosol attenuates diquat-induced oxidative stress by activating Nrf2 pathway and modulating colonic microbiota in mice

文献类型： 外文期刊

第一作者： Han, Hui

作者： Han, Hui;Zhong, Ruqing;Zhang, Shunfen;Wang, Mengyu;Wen, Xiaobin;Yi, Bao;Zhao, Yong;Chen, Liang;Zhang, Hongfu;Han, Hui;Chen, Liang;Zhang, Hongfu

作者机构：

关键词： Hydroxytyrosol; Oxidative stress; NF-E2-related factor 2; Gut microbiota; Antioxidant capacity

期刊名称：JOURNAL OF NUTRITIONAL BIOCHEMISTRY （ 影响因子：5.6； 五年影响因子：5.9 ）

ISSN： 0955-2863

年卷期： 2023 年 113 卷

页码：

收录情况： SCI

摘要： This study was conducted to investigate the antioxidant effects of hydroxytyrosol (HT) administration in diquat (DQ)-challenged mice. The results showed that HT treatment markedly alleviated DQ-induced oxidative stress, which was indicated by the enhanced total antioxidant capacity (T-AOC), in-creased activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase and decreased malondialdehyde (MDA) concentration in serum. Additionally, HT increased the mRNA expression levels of NF-E2-related factor 2 (Nrf2) and its downstream genes, including NADPH quinone oxidore-ductase 1 (NQO1) and catalase (CAT) in the small intestine of DQ-challenged mice. 16S rRNA gene sequencing results showed that HT treatment increased the relative abundance of Firmicutes and Lactobacillus and decreased the relative abundance of Bacteroidetes. Interestingly, Pearson correlation analysis showed that there were strong association between colonic Firmicutes, Lactobacillus, and Bacteroidetes and the activities of serum antioxidant enzymes. Meanwhile, HT significantly enhanced the colonic butyrate concentration in DQ-challenged mice. Additionally, HT treatment decreased the serum metabolites involving in glycerophospholipid metabolism, pentose, and glucuronate interconversions, which were associated with alleviated oxidative stress. These results indicate that oral administration of 100 mg/kg body weight HT alleviates oxidative stress in DQ-challenged mice, which may involve Nrf2 signaling pathways via modulation of colonic microbiota.(c) 2022 Elsevier Inc. All rights reserved.

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