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Quercetin ameliorates diabetic encephalopathy through SIRT1/ER stress pathway in db/db mice

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机构: [1]Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China [2]Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China [3]Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
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关键词: quercetin diabetic encephalopathy SIRT1 ER stress

摘要:
Studies have shown that diabetes is an important risk factor for cognitive dysfunction, also called diabetic encephalopathy (DE). Quercetin has been reported to be effective in improving cognitive dysfunction in DE. But its detailed mechanism is still ambiguous. In this study, we used db/db mice to investigate whether quercetin could activate SIRT1 and inhibit ER pathways to improve DE. Behavioral tests (Morris water maze and new objects) showed that quercetin (70 mg/kg) can effectively improve the learning and memory ability in db/db mice. OGTT and ITT tests indicated that quercetin could alleviate impaired glucose tolerance and insulin resistance in db/db mice. Western blot analysis and Nissl staining showed that quercetin can improve the expression of nerve and synapse-associated proteins (PSD93, PSD95, NGF and BDNF) and inhibit neurodegeneration. Meanwhile, quercetin up-regulates SIRT1 protein expression and inhibits the expression of ER signaling pathway-related proteins (PERK, IRE-1 alpha, ATF6, elF2 alpha, BIP and PDI). In addition, oxidative stress levels were significantly reduced after quercetin treatment. In conclusion, current experimental results indicated that SIRT1/ER stress is a promising mechanism involved in quercetin-treated diabetic encephalopathy.

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出版当年[2019]版:
大类 | 2 区 医学
小类 | 2 区 老年医学 3 区 细胞生物学
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出版当年[2018]版:
Q1 GERIATRICS & GERONTOLOGY Q1 CELL BIOLOGY
最新[2023]版:
Q2 CELL BIOLOGY Q2 GERIATRICS & GERONTOLOGY

影响因子: 最新[2023版] 最新五年平均 出版当年[2018版] 出版当年五年平均 出版前一年[2017版] 出版后一年[2019版]

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第一作者机构: [1]Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China [2]Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
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通讯机构: [1]Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China [2]Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
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