IL-17A 通过 ATG5 和 ATG7 在脑出血中诱导自噬并促进小胶质细胞神经炎症。
IL-17A induces autophagy and promotes microglial neuroinflammation through ATG5 and ATG7 in intracerebral hemorrhage.
机构信息
Department of Neurosurgery, Yongchuan Hospital, Chongqing Medical University, Chongqing 402160, China.
Department of Neurology, Yongchuan Hospital, Chongqing Medical University, Chongqing 402160, China.
出版信息
J Neuroimmunol. 2018 Oct 15;323:143-151. doi: 10.1016/j.jneuroim.2017.07.015. Epub 2017 Jul 25.
Microglial inflammation plays a vital role in intracerebral hemorrhage (ICH)-induced secondary brain injury. IL-17A has been identified to promote microglia activation, but the role in the pathology following ICH remains unclear. Autophagy is involved in modulation of cell metabolism, cell survival, and immune response. However, the role of IL-17A in autophagy following ICH has not been well defined. In this study, we assessed the role of IL-17A in microglial autophagic activity following ICH. The microglia were treated with IL-17A, and then autophagy and inflammation were detected. In addition, RNA interference in essential autophagy genes (ATG5 and ATG7) was also utilized to analyze microglial autophagy in vitro. Furthermore, ICH mice were made by injection of autologous blood model in vivo. And the IL-17A-neutralizing antibody was utilized to assess the neurological scores and brain edema. These data demonstrated that IL-17A promoted microglial autophagy and microglial inflammation. The suppression of autophagy using RNA interference in essential autophagy genes (ATG5 and ATG7) decreased microglial autophagy and inflammation. Moreover, IL-17A Ab significantly reduced brain water content and improved neurological function of ICH mice. Taken together, these data demonstrated that IL-17A promoted microglial autophagy and microglial inflammation, and IL-17A-mediated activation of autophagy might represent novel clues in ICH therapy.
小胶质细胞炎症在脑出血(ICH)引起的继发性脑损伤中起着至关重要的作用。IL-17A 已被确定可促进小胶质细胞活化,但在 ICH 后的病理过程中的作用尚不清楚。自噬参与调节细胞代谢、细胞存活和免疫反应。然而,IL-17A 在 ICH 后自噬中的作用尚未得到很好的定义。在这项研究中,我们评估了 IL-17A 在 ICH 后小胶质细胞自噬活性中的作用。用 IL-17A 处理小胶质细胞,然后检测自噬和炎症。此外,还利用必需自噬基因(ATG5 和 ATG7)的 RNA 干扰来分析体外小胶质细胞自噬。此外,通过体内自体血模型注射在体内制造 ICH 小鼠。并利用 IL-17A 中和抗体评估神经评分和脑水肿。这些数据表明,IL-17A 促进小胶质细胞自噬和小胶质细胞炎症。使用必需自噬基因(ATG5 和 ATG7)的 RNA 干扰抑制自噬可减少小胶质细胞自噬和炎症。此外,IL-17A Ab 可显著降低 ICH 小鼠的脑水含量并改善其神经功能。总之,这些数据表明,IL-17A 促进小胶质细胞自噬和小胶质细胞炎症,而 IL-17A 介导的自噬激活可能代表 ICH 治疗的新线索。