Bibliographic Details
| Title: |
An Improved Drugs Screening System Reveals that Baicalein Ameliorates the Aβ/AMPA/NMDA-Induced Depolarization of Neurons. |
| Authors: |
Tian-Syuan Lin, Han-Jung Tsai, Chih-Han Lee, Yan-Qing Song, Rih-Sheng Huang, Hsiu-Mei Hsieh-Li, Yenshou Lin, Mei-Chih Liang, Lin, Tian-Syuan, Tsai, Han-Jung, Lee, Chih-Han, Song, Yan-Qing, Huang, Rih-Sheng, Hsieh-Li, Hsiu-Mei, Lin, Yenshou, Liang, Mei-Chih |
| Source: |
Journal of Alzheimer's Disease; 2017, Vol. 56 Issue 3, p959-976, 18p, 6 Color Photographs, 1 Chart, 2 Graphs |
| Subject Terms: |
ALZHEIMER'S disease research, AMYLOID beta-protein, TAU proteins, GLUTAMATE receptors, MEMANTINE, ANIMAL experimentation, ANIMALS, BIOLOGICAL transport, CELL culture, CELL receptors, CEREBRAL cortex, DRUGS, DRUG design, CLINICAL drug trials, EPITHELIAL cells, HERBAL medicine, MICE, NEURONS, NEUROTRANSMITTERS, PEPTIDES, TRANSFERASES, PLANT extracts, NEUROPROTECTIVE agents, FLAVANONES, PHARMACODYNAMICS, PHYSIOLOGY |
| Abstract: |
The presence of amyloid-β (Aβ) plaque and tau protein hyperphosphorylation in brain tissue is the pathological hallmark of Alzheimer's disease (AD). At least some Aβ neurotoxicity is caused by the presence of excess glutamate that has been induced by Aβ accumulation. Memantine is currently the only NMDA receptor inhibitor approved for treating moderate-to-severe AD patients. We utilized primary cortical neurons and DiBAC4(3), a slow-response voltage sensitive fluorescence dye, to create a novel system for screening herbal medicines that allows the identification of pure compounds able to ameliorate Aβ-induced abnormal depolarization. The intensity of DiBAC4(3) fluorescence was increased when primary neurons were stimulated by Aβ; furthermore, pre-treatment with memantine abolished this change. Using this system, we identified six crude extracts made from herbal medicines that effectively alleviated this Aβ-induced abnormal depolarization. Among these herbal medicines, one pure compound, baicalein, which was known to be present in Scutellaria baricalensis and is known to improve memory using an AD mouse model, was identified by our assay. However, the compound's molecular mechanism remained unknown. We found that baicalein, in addition to inhibiting Aβ-induced depolarization, possibly functions as an antagonist of AMPA and NMDA receptors. Taken together, we have established a system/platform to identify herbal medicines that ameliorate Aβ-induced depolarization of neurons. Equally important, baicalein is a candidate drug with great potential for the treatment of AD patients. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
