4.6 Article

Role of C/EBP-β in Methamphetamine-Mediated Microglial Apoptosis

Journal

FRONTIERS IN CELLULAR NEUROSCIENCE
Volume 13, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fncel.2019.00366

Keywords

methamphetamine; C/EBP-beta; lipocalin2; microglia; apoptosis

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Funding

  1. National Natural Science Foundation of China [81430045, 81871528]
  2. Guangzhou Sci-Tech Project [201804010307]
  3. Natural Science Foundation of Guangdong Province [2018A030313876]

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Methamphetamine (MA) is a widely abused psychoactive drug that primarily damages the nervous system. However, the involvement of MA in the survival of microglia remains poorly understood. CCAAT-enhancer binding protein (C/EBP-beta) is a transcription factor and an important regulator of cell apoptosis. Lipocalin2 (lcn2) is a known apoptosis inducer and is involved in many cell death processes. We hypothesized that C/EBP-beta is involved in MA-induced lcn2-mediated microglial apoptosis. To test this hypothesis, we measured the protein expression of C/EBP-beta after MA treatment and evaluated the effects of silencing C/EBP-beta or lcn2 on MA-induced apoptosis in BV-2 cells and the mouse striatum after intrastriatal MA injection. MA exposure increased the expression of C/EBP-beta and stimulated the lcn2-mediated modulation of apoptosis. Moreover, silencing the C/EBP-beta-dependent lcn2 upregulation reversed the MA-induced microglial apoptosis. The in vivo relevance of these findings was confirmed in mouse models, which demonstrated that the microinjection of anti-C/EBP-beta into the striatum ameliorated the MA-induced decrease survival of microglia. These findings provide a new insight regarding the specific contributions of C/EBP-O-lcn2 to microglial survival in the context of MA abuse.

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