Isoliquiritigenin isolated from Glycyrrhiza uralensis protects neuronal cells against glutamate-induced mitochondrial dysfunction

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• 作者：Eun-Ju Yang^a ; ¹ ; Ju Sik Min^b ; ¹ ; Hyun-Yeong Ku^c ; Hoon-Sung Choi^b ; Moon-ki Park^e ; Min Kyu Kim^f ; Kyung-Sik Song^d ; ^{kssong@knu.ac.kr} ; Dong-Seok Lee^b ; ^{lee1@knu.ac.kr}
• 关键词：Isoliquiritigenin (ISL) ; Glutamate ; Neuronal cells ; Mitochondrial dysfunction ; Reactive oxygen species (ROS) ; Apoptosis-inducing factor (AIF)
• 刊名：Biochemical and Biophysical Research Communications
• 出版年：2012
• 期刊代码：159_0006291x
• 类别：bio
• 出版时间：18 May, 2012
• 卷：421
• 期：4
• 页码：658-664
• 文件大小：727 K

摘要

Glutamate-mediated excitotoxicity, which is associated with reactive oxygen species (ROS), is hypothesized to be a major contributor to pathological cell death in the mammalian central nervous system, and to be involved in many acute and chronic brain diseases.

Here, we showed that isoliquiritigenin (ISL) isolated from Glycyrrhiza uralensis (Gu), one of the most frequently prescribed oriental herbal medicines, protected HT22 hippocampal neuronal cells from glutamate-induced oxidative stress. In addition, we clarified the molecular mechanisms by which it protects against glutamate-induced neuronal cell death. ISL reversed glutamate-induced ROS production and mitochondrial depolarization, as well as glutamate-induced changes in expression of the apoptotic regulators Bcl-2 and Bax. Pretreatment of HT22 cells with ISL suppresses the release of apoptosis-inducing factor from mitochondria into the cytosol. Taken together, our results suggest that ISL may protect against mitochondrial dysfunction by limiting glutamate-induced oxidative stress.

In conclusion, our results demonstrated that ISL isolated from Gu has protective effects against glutamate-induced mitochondrial damage and hippocampal neuronal cell death. We expect ISL to be useful in the development of drugs to prevent or treat neurodegenerative diseases.