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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Zhao, Tong Qiao, Qinglian Liu, Qian Liu, Zhigang Ren, Bo Sun, Yali Zhang, Wentong Liu, Xuebo |
| Copyright Year | 2017 |
| Abstract | Sesamol, a nutritional component from sesame, possesses antioxidant, lipid lowering and antidepressant activities. Nonetheless, few studies report its effects on high-energy-dense diet-induced cognitive loss. The present research aimed to elucidate the action of sesamol on high-fat and high-fructose (HFFD) “western”-diet-induced central nervous system insulin resistance and learning and memory impairment, and further determined the possible underlying mechanism. 3 month-old C57BL/6J mice were divided into 3 groups with/without sesamol in the drinking water (0.05%, w/v) and standard diet, HFFD, and HFFD with sesamol supplementation. Morris water maze tests demonstrated that sesamol improved HFFD-elicited learning and memory loss. Sesamol was also found to attenuate neuron damage in HFFD-fed mice. Importantly, sesamol treatment up-regulated brain insulin signaling by stimulating IRS-1/AKT as well as ERK/CREB/BDNF pathways; meanwhile it down-regulated neuronal death signaling GSK3β and JNK. Moreover, sesamol also normalized mRNA expressions of neurotrophins including BDNF and NT-3, as well as expressions of mitochondrial metabolic and biogenesis related genes Sirt1 and PGC1α. Consistently, sesamol also reversed high-glucose-induced oxidized cellular status, mitochondrial membrane potential loss, insulin signaling inhibition and cell death in SH-SY5Y neuronal cells. Taken together, the current study proved that sesamol reduced western-diet-induced cognitive defects in a mouse model by inhibiting insulin resistance, normalizing mitochondrial function and cell redox status, and improving IRS/AKT cell surviving and energy metabolism regulating signaling. This compelling evidence indicated that sesamol is a potential nutritional supplement to prevent unhealthy-diet-induced learning and memory loss. |
| Starting Page | 710 |
| Ending Page | 719 |
| Page Count | 10 |
| File Format | HTM / HTML PDF |
| ISSN | 20426496 |
| Volume Number | 8 |
| Issue Number | 2 |
| Journal | Food & Function |
| DOI | 10.1039/c6fo01562j |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | BDNF Morris Sesamol Antioxidant Lipid metabolism Antidepressant Central nervous system Insulin resistance Memory Morris water navigation task Neuron Insulin Internal Revenue Service Protein kinase B Mitogen-activated protein kinase CREB Brain-derived neurotrophic factor GSK3B C-Jun N-terminal kinases Messenger RNA Neurotrophin-3 Sirtuin 1 Membrane potential SH-SY5Y Mouse Redox Metabolism |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Food Science |
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