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Depression: 21st Century Solutions + The Dark Side of Wheat

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Abstract Title:

Decrease in the Generation of Amyloid-β Due to Salvianolic Acid B by Modulating BACE1 Activity.

Abstract Source:

Curr Alzheimer Res. 2017 ;14(11):1229-1237. PMID: 28413985

Abstract Author(s):

Siva Sundara Kumar Durairajan, Venkat Reddy Chirasani, Sravan Gopalakrishnan Shetty, Ashok Iyaswamy, Sandeep Malampati, Juxian Song, Liangfeng Liu, Jiandong Huang, Sanjib Senapati, Min Li

Article Affiliation:

Siva Sundara Kumar Durairajan

Abstract:

OBJECTIVE: Generation and accumulation of the amyloid-β (Aβ) peptide after proteolytic processing of the full length amyloid precursor protein (FL-APP) by β-secretase (β-site APP cleaving enzyme or BACE1) and γ-secretase are the main causal factors of Alzheimer's disease (AD). Thus, inhibition of BACE1, a rate-limiting enzyme in the production ofAβ, is an attractive therapeutic approach for the treatment of AD. Recent studies suggest that salvianolic acid B (Sal B) is isolated from the radix of Salvia miltiorrhiza Bunge, a Chinese herbal medicine commonly used for the treatment of cardiovascular, cerebrovascular and liver diseases in China.

METHOD: In this study, we discovered that Sal B acted as a BACE1 modulator and reduced the level of secreted Aβ in two different Swedish APP (SwedAPP) mutant cell lines. Using N2a-mouse and H4- human neuroglioma cell lines expressing SwedAPP, it was demonstrated that Sal B significantly and dose-dependently decreased the generation of extracellular Aβ, soluble APPβ (by-product of APP cleaved by BACE1), and intracellular C-terminal fragment β from APP without influencing α-secretase and γ-secretase activity and the levels of FL-APP. In addition, using protein-docking, we determined the potential conformation of Sal B on BACE1 docking and revealed the interactions of Sal B with the BACE1 catalyticcenter.

RESULTS: The docking provides a feasible explanation for the experimental results, especially in terms of the molecular basis of Sal B's action. Our results indicate that Sal B is a BACE1 inhibitor and, as such, is a promising candidate for the treatment of AD.

Study Type : Animal Study

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Depression: 21st Century Solutions + The Dark Side of Wheat

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