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Liquiritin potentiate neurite outgrowth induced by nerve growth factor in PC12 cells
Authors:Zheng-ai Chen  Jun-Long Wang  Rui-Ting Liu  Jian-Ping Ren  Li-Qing Wen  Xiao-Juan Chen  Guang-Xing Bian
Institution:1. Department of Pharmacology, Medical College, Yanbian University, 13300, Yanji, Jilin Province, People’s Republic of China
2. Department of Pharmacology and Toxicology, Beijing Institute of Radiation Medicine, 100850, Beijing, People’s Republic of China
Abstract:Neurite outgrowth and neuronal differentiation play a crucial role in the development of the nervous system. Understanding of neurotrophins induced neurite outgrowth was important to develop therapeutic strategy for axon regeneration in neurodegenerative diseases as well as after various nerve injuries. It has been reported that extension of neurite and differentiation of sympathetic neuron-like phenotype was modulated by nerve growth factor (NGF) in PC12 cells. In this study, NGF mediated neurite outgrowth was investigated in PC12 cells after liquiritin exposure. Liquiritin is a kind of flavonoids that is extracted from Glycyrrhizae radix, which is frequently used to treat injury or swelling for its life-enhancing properties as well as detoxification in traditional Oriental medicine. The result showed that liquiritin significantly promotes the neurite outgrowth stimulated by NGF in PC12 cells in dose dependant manners whereas the liquiritin alone did not induce neurite outgrowth. Oligo microarray and RT-PCR analysis further clarified that the neurotrophic effect of liquiritin was related to the overexpression of neural related genes such as neurogenin 3, neurofibromatosis 1, notch gene homolog 2, neuromedin U receptor 2 and neurotrophin 5. Thus, liquiritin may be a good candidate for treatment of various neurodegenerative diseases such as Alzheimer’s disease or Parkinson’s disease.
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