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http://dx.doi.org/10.5352/JLS.2015.25.6.656

A Screen for Dual-protection Molecules from a Natural Product Library against Neuronal Cell Death and Microglial Cell Activation  

Min, Ju-Sik (School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University)
Lee, Dong-Seok (School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University)
Publication Information
Journal of Life Science / v.25, no.6, 2015 , pp. 656-662 More about this Journal
Abstract
Natural products and natural product structures play a general and highly significant role in drug discovery and development process because it has various merits and potentials for new drug source that have extensive clinical experience, development time contraction, excellent stability and safety. In several neurological disorders, neuronal death and excessive activation of microglia (neuro-inflammation) are observed. A number of drug discovery-related neuronal cell death and neuro-inflammation was studied from natural products, respectively. However, until now, it has not been possible to study dual-protection molecules recorded in the Natural Product library. In the present study, using the natural product-derived library of the Institute for Korea Traditional Medical Industry, we investigated dual-protective molecules against glutamate (a classical excitatory neurotransmitter)-induced oxidative stress mediated neuronal cell death and LPS-induced excessive activated microglial cells (immune cells of the brain). Chrysophanol, extracted from Rheum palmatum, had dual-protective effects against both glutamate-induced neuronal cell death and LPS-induced NO production, triggering proinflammatory cytokines and microglia activation and resulting in neuroinflammation. Flow-cytometry analysis revealed that chrysophanol had a scavenger effect, scavenging glutamate- and LPS-induced reactive oxygen species (ROS) produced by neuronal and microglial cells, respectively. Based on the present study, chrysophanol may have an important protective role against neuronal cell death and neuroinflammation in the brain. The results may be helpful for studying drug development candidates for treating central nervous system disorders.
Keywords
Microglial cell; natural product; neuroinflammation; neuronal cell; reactive oxygen species;
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