Inhibition of β-Amyloid Aggregation by Albiflorin, Aloeemodin and Neohesperidin and their Neuroprotective Effect on Primary Hippocampal Cells Against β-Amyloid Induced Toxicity

Author(s): See-Lok Ho, Chung-Yan Poon, Chengyuan Lin, Ting Yan, Daniel Wai-Jing Kwong, Ken Kin-Lam Yung, Man S. Wong, Zhaoxiang Bian, Hung-Wing Li.

Journal Name: Current Alzheimer Research

Volume 12 , Issue 5 , 2015

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Abstract:

Being one of the hallmarks of Alzheimer’s disease, β-amyloid (Aβ) aggregates induce complicated neurotoxicity. Evidences show that the underlying mechanism of neurotoxicity involves a glutamate receptor subtype, N-methyl-D-aspartate (NMDA) receptor, an increase in intracellular calcium( II) ion loading as well as an elevation in oxidation stress. In this work, among the 35 chemical components of Chinese herbal medicines (CHMs) being screened for inhibitors of Aβ aggregation, four of them, namely albiflorin, aloeemodin, neohesperidin and physcion, were found for the first time to exhibit a potent inhibitory effect on Aβ1-40 and Aβ1-42 aggregation. Their neuroprotective capability on primary hippocampal neuronal cells was also investigated by MTT assay, ROS assay and intracellular calcium(II) ion concentration measurement. It was interesting to find that physcion was rather toxic to neuronal cells while albiflorin, aloeemodin and neohesperidin reduced the toxicity and ROS induced by both monomeric and oligomeric Aβ species. In addition, albiflorin was particularly powerful in maintaining the intracellular Ca2+ concentration.

Keywords: Amyloid aggregation, calcium influx, herbs, inhibitors, neuroprotection, reactive oxygen species.

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Article Details

VOLUME: 12
ISSUE: 5
Year: 2015
Page: [424 - 433]
Pages: 10
DOI: 10.2174/1567205012666150504144919
Price: $58

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