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Abstract Title:

(+)-Sesamin attenuates chronic unpredictable mild stress-induced depressive-like behaviors and memory deficits via suppression of neuroinflammation.

Abstract Source:

J Nutr Biochem. 2019 02 ;64:61-71. Epub 2018 Oct 25. PMID: 30445417

Abstract Author(s):

Yihang Zhao, Qianxu Wang, Mengzhen Jia, Shangchen Fu, Junru Pan, Chuanqi Chu, Xiaoning Liu, Xuebo Liu, Zhigang Liu

Article Affiliation:

Yihang Zhao

Abstract:

Depression is a mood disorder that is related to neuroinflammation and cognition loss. This study is aimed to determine the potential antidepressant effects of (+)-sesamin, a lignan component of sesame, in a mild stress-induced depression mouse model. CD-1 mice were treated with chronic unpredictable mild stress (CUMS) process and orally administrated with sesamin (50 mg/kg/d) for 6 weeks. Behavioral tests including forced swimming test, tail suspension test, open field test, and elevated plus maze test demonstrated that sesamin treatment inhibited CUMS-induced mice depressant-like behaviors and anxiety, without changing immobility. It was found that sesamin prevented stress-induced decease levels of 5-HT and NE in striatum and serum. Cognitive deficits were assessed using Y-maze and Morris water maze test. Sesamin treatment also prevented stressed-induced memory impairments and neuronal damages. Consistently, sesamin also enhanced synapse ultrastructure and improved expressions of PSD-95 in stressed mice hippocampus with improving neurotrophic factors expression including BDNF and NT3. Moreover, sesamin treatment significantly prevented CUMS-induced neuroinflammation by inhibiting over-activation of microglia and expressions of inflammatory mediators including iNOS, COX-2, TNF-α and IL-1β in stressed mice hippocampus and cortex. These results illustrated that sesamin markedly improved CUMS-induced depression and memory loss via inhibiting neuroinflammation, which indicate that as food component, sesamin might be also a novel potential therapeutic for depression.

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