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    Title: Regulatory Effects of Neuroinflammatory Responses Through Brain-Derived Neurotrophic Factor Signaling in Microglial Cells.
    Authors: La, Sheng-Wei;Lai, Sheng-Wei;Che, Jia-Hong;Chen, Jia-Hong;Li, Hsiao-Yun;Lin, Hsiao-Yun;Liu, Yu-Shu;Liu, Yu-Shu;蔡政芳;Tsai, Cheng-Fang;張培均;Chang, Pei-Chun;盧大宇;Lu, Dah-Yuu;*;Lin, Chingju;Lin, Chingju
    Contributors: 生物科技學系
    Date: 2018-01
    Issue Date: 2018-08-20 09:43:56 (UTC+8)
    Abstract: Inhibition of microglial over-activation is an important strategy to counter balance neurodegenerative progression. We previously demonstrated that the adenosine monophosphate-activated protein kinase (AMPK) may be a therapeutic target in mediating anti-neuroinflammatory responses in microglia. Brain-derived neurotrophic factor (BDNF) is one of the major neurotrophic factors produced by astrocytes to maintain the development and survival of neurons in the brain, and have recently been shown to modulate homeostasis of neuroinflammation. Therefore, the present study focused on BDNF-mediated neuroinflammatory responses and may provide an endogenous regulation of neuroinflammation. Among the tested neuroinflammation, epigallocatechin gallate (EGCG) and minocycline exerted BDNF upregulation to inhibit COX-2 and proinflammatory mediator expressions. Furthermore, both EGCG and minocycline upregulated BDNF expression in microglia through AMPK signaling. In addition, minocycline and EGCG also increased expressions of erythropoietin (EPO) and sonic hedgehog (Shh). In the endogenous modulation of neuroinflammation, astrocyte-conditioned medium (AgCM) also decreased the expression of COX-2 and upregulated BDNF expression in microglia. The anti-inflammatory effects of BDNF were mediated through EPO/Shh in microglia. Our results indicated that the BDNF-EPO-Shh novel-signaling pathway underlies the regulation of inflammatory responses and may be regarded as a potential therapeutic target in neurodegenerative diseases. This study also reveals a better understanding of an endogenous crosstalk between astrocytes and microglia to regulate anti-inflammatory actions, which could provide a novel strategy for the treatment of neuroinflammation and neurodegenerative diseases.

    Astrocytes; BDNF; Cox-2; Microglia; Neuroinflammation
    Appears in Collections:[Department of Biotechnology] Journal Article

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