PMID- 32308456 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220414 IS - 1178-7007 (Print) IS - 1178-7007 (Electronic) IS - 1178-7007 (Linking) VI - 13 DP - 2020 TI - Resveratrol Prevents Cognitive Impairment in Type 2 Diabetic Mice by Upregulating Nrf2 Expression and Transcriptional Level. PG - 1061-1075 LID - 10.2147/DMSO.S243560 [doi] AB - PURPOSE: This study aimed to determine whether the natural antioxidant resveratrol (RSV) prevents type 2 diabetes mellitus (T2DM)-induced cognitive impairment and to explore whether redox-associated factor nuclear factor erythroid 2-related factor 2 (Nrf2) plays a critical role in the neuroprotective effect of RSV. MATERIALS AND METHODS: We established a T2DM model with 8-week-old male ICR mice by administration of a high-fat diet for 2 months and low-dose streptozotocin for 3 days. Then, diabetic and age-matched control mice were treated with or without RSV for 4 months every other day and subjected to the Morris water maze test. After the mice were euthanized, whole brains were sectioned for Nissl staining and immunofluorescence labeling. Hippocampal sections were observed by transmission electron microscopy to evaluate the ultrastructure of synapses. Inflammatory factors, oxidative stress-related indexes, and Nrf2 and downstream target gene expression were analyzed in hippocampal tissues by quantitative real-time PCR, Western blotting, and associated quantitative kits. RESULTS: In the Morris water maze test, compared to control mice, T2DM mice showed learning and memory impairments, but RSV treatment prevented the learning and memory decline in T2DM mice. Similarly, RSV prevented T2DM-induced hippocampal neuron destruction and synaptic ultrastructural damage. The expression levels of inflammatory factors and oxidative stress-related indicators were increased in the T2DM group compared with the control group but were decreased significantly by RSV treatment in the T2DM group. Additionally, the expression of Nrf2 and its downstream target genes was decreased in the T2DM group compared with the control group and was significantly increased by RSV treatment in the T2DM group. CONCLUSION: RSV prevented T2DM-induced cognitive impairment through anti-inflammatory and antioxidant activities. This effect was accompanied by the upregulation of Nrf2 transcriptional activity and the increased expression of downstream antioxidant genes. CI - (c) 2020 Wang et al. FAU - Wang, Xiaoxiao AU - Wang X AUID- ORCID: 0000-0002-4458-9166 AD - Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei 050017, People's Republic of China. FAU - Fang, Hui AU - Fang H AD - Second Department of Endocrinology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, People's Republic of China. FAU - Xu, Gang AU - Xu G AD - Department of Burns and Orthopedics, Tangshan Gongren Hospital, Tangshan, Hebei 063000, People's Republic of China. FAU - Yang, Ying AU - Yang Y AD - Second Department of Endocrinology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, People's Republic of China. FAU - Xu, Ruizhe AU - Xu R AD - Department of Clinical Medicine, Tangshan Vocational and Technical College, Tangshan, Hebei, 063000, People's Republic of China. FAU - Liu, Qiang AU - Liu Q AD - Department of Internal Medicine, North China University of Science and Technology, Tangshan, Hebei 063000, People's Republic of China. FAU - Xue, Xiangyu AU - Xue X AD - Department of Internal Medicine, North China University of Science and Technology, Tangshan, Hebei 063000, People's Republic of China. FAU - Liu, Jiaqi AU - Liu J AD - Department of Internal Medicine, North China University of Science and Technology, Tangshan, Hebei 063000, People's Republic of China. FAU - Wang, Hezhi AU - Wang H AUID- ORCID: 0000-0002-3194-8086 AD - Department of Surgery, Hebei Medical University, Shijiazhuang 050017, People's Republic of China. LA - eng PT - Journal Article DEP - 20200407 PL - New Zealand TA - Diabetes Metab Syndr Obes JT - Diabetes, metabolic syndrome and obesity : targets and therapy JID - 101515585 EIN - Diabetes Metab Syndr Obes. 2020 Jun 17;13:2057. PMID: 32606864 PMC - PMC7150671 OTO - NOTNLM OT - Nrf2 activator OT - inflammation OT - natural antioxidant OT - oxidative stress COIS- The authors report that there are no potential conflicts of interest associated with this article. EDAT- 2020/04/21 06:00 MHDA- 2020/04/21 06:01 PMCR- 2020/04/07 CRDT- 2020/04/21 06:00 PHST- 2019/12/24 00:00 [received] PHST- 2020/03/26 00:00 [accepted] PHST- 2020/04/21 06:00 [entrez] PHST- 2020/04/21 06:00 [pubmed] PHST- 2020/04/21 06:01 [medline] PHST- 2020/04/07 00:00 [pmc-release] AID - 243560 [pii] AID - 10.2147/DMSO.S243560 [doi] PST - epublish SO - Diabetes Metab Syndr Obes. 2020 Apr 7;13:1061-1075. doi: 10.2147/DMSO.S243560. eCollection 2020.