Notopterygium incisum extract (NRE) rescues cognitive deficits in APP/PS1 Alzhneimer's disease mice by attenuating amyloid-beta, tau, and neuroinflammation pathology

Published on Mar 1, 2020in Journal of Ethnopharmacology3.69
· DOI :10.1016/J.JEP.2019.112433
Xiaowen Jiang7
Estimated H-index: 7
(SPU: Shenyang Pharmaceutical University),
Wenwu Liu4
Estimated H-index: 4
(SPU: Shenyang Pharmaceutical University)
+ 5 AuthorsQingchun Zhao13
Estimated H-index: 13
(SPU: Shenyang Pharmaceutical University)
Abstract Ethnopharmacological relevance Alzheimer's disease (AD) is a frequently occurring disease of the elderly, and “deficiency” is the root of AD. Most famous experts of traditional Chinese medicine believe that the disease is based on deficiency, and the deficiency of kidney essence is the basis. Notopterygium incisum (Qiang huo) is specialized in bladder and liver and kidney. Treatment of liver and kidney deficiency, language difficulty, mental coma. Qiang huo yu feng tang has been used to treat liver and kidney deficiency, unclear language and mental paralysis in many traditional Chinese medicine books and records. In modern times, it has been used to treat AD and exhibited favourable efficacy. Aim of the study This study attempts to investigate the effects of furocoumarins from Notopterygium incisum (NRE) on the Aβ cascade, tau pathology and inflammatory pathology of AD. Materials and methods In this study, we reported a detailed protocol for stabilizing HEK APPswe293T cells with lentivirus for the first time. This cell line can secrete high concentration of Aβ. In addition, we treated N2a cells with AKT/PKC specific inhibitors (wortmannin/GF-109203X) and established a tau pathological cell model (AKT/PKC N2a) by activating GSK3β and triggering hyperphosphorylation of tau. The Aβ levels and the expression of phosphorylated tau were detected by ELISA and Western blot. The cognitive ability of NRE on APP/PS1 mice was detected using a Morris water maze (MWM) assay and Aβ contents were also evaluated. Results In HEK APPswe293T cells, NRE (10, 20, 40 μg/mL) significantly inhibited the secretion and production of Aβ in dose dependent manner. In addition, NRE also suppressed the expression of phosphorylated tau in wortmannin/GF-109203X treated N2a cells. Furthermore, NRE ameliorated the cognitive impairment of APP/PS1 mice, and the contents of Aβ, IL-1β and TNF-α were significantly depressed in hippocampus and cortex. Conclusion In conclusion, our results demonstrated that NRE has a potential anti-AD effect via the inhibition of the Aβ cascade, tau pathology and neuroinflammation in vitro and in vivo.
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