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Abstract Title:

Sesamol supplementation prevents systemic inflammation-induced memory impairment and amyloidogenesis via inhibition of nuclear factor kappaB.

Abstract Source:

Mol Nutr Food Res. 2016 Nov 15. Epub 2016 Nov 15. PMID: 27860258

Abstract Author(s):

Zhigang Liu, Yuwei Chen, Qinglian Qiao, Yali Sun, Qian Liu, Bo Ren, Xuebo Liu

Article Affiliation:

Zhigang Liu

Abstract:

SCOPE: The aim of the present study was to investigate the inhibitory effects of sesamol, a phenolic lignan from sesame, on the systemic inflammation-induced neuroinflammation and amyloidogenesis as well as memory impairment.

METHODS AND RESULTS: C57BL/6J mice were treated with 0.05% sesamol (w/v) in the drinking water for 7 weeks, and then the mice were treated by intraperitoneal injection of LPS (0.25 mg/kg) for 9 days. Sesamol supplementation significantly improved (by 36.9%) LPS-induced decreased spontaneous alteration in Y-maze test, as well as significantly restored LPS-elicited mice cognitive deficits through restoring performances such as escape distance in Morris water maze test. Moreover, sesamol prevented LPS-induced increases in Aβ1-42 formation, levels of amyloid precursor protein, and neuronal β-secretase 1 (BACE1) in the brain. Sesamol reduced LPS-induced glial over-activation by inhibiting MAPK and NFκB pathway as well as expressions of inflammatory mediators such as IL-1β and TNFα. Furthermore, LPS-induced transcriptional factor NFκB DNA binding activity was also inhibited by sesamol as examined by the electrophoretic mobility shift assay and molecular modeling.

CONCLUSION: These results indicated that sesamol mitigated LPS-induced amyloidogenesis and memory impairment via inhibiting NFκB signal pathway, suggesting that the compound might be plausible therapeutic intervention for neuroinflammation-related diseases such as AD.

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