期刊
FRONTIERS IN CELLULAR NEUROSCIENCE
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fncel.2019.00199
关键词
microglia; Listeria; extracellular traps; reactive oxygen species; vesicle
资金
- State's Key Project of Research and Development Plan [2016YFD0501302, 2017YFD0502200]
- National Natural Science Foundation of China [31172364, 81801972]
- Fund for Science and Technology Development of Jilin Province [20150101108JC]
- Important National Science and Technology Specific Projects [2012ZX10003002]
- Program for New Century Excellent Talents in University [NCET-09-0434]
- Project of the Education Department of Jilin Province [2016444]
- Science, Technology and Innovation Commission of Shenzhen Municipality [JCYJ2016031100720906, JSGG20160301100442775]
Previous studies have demonstrated that T cells and microglia could fight against cerebral Listeria monocytogenes (Listeria); however, their synergistic anti-Listeria mechanisms remain unknown. Following Listeria infection in a culture system, we found that microglia, but not nerve cells, could release extracellular traps (ETs) which originated from microglial vesicles. Specific inhibitor analysis showed that extracellular DNA (eDNA), matrix metallopeptidases (MMP9 and MMP12), citrullinated histone H3, and peptidyl arginine deiminase 2 were the major components of microglial ETs (MiETs) and were also the components of vesicles. Systematic analysis indicated that Listeria-induced MiETs were cytosolic reactive oxygen species (ROS)- and NADPH oxidase (NOX)-dependent and involved ERK. MiETs were exhibited in Listeria-infected mouse brain and might protected against Listeria infection via bacterial killing in a mouse meningitis model, and MiETs existed in cerebrospinal fluid (CSF) from Listeria meningitis patients in vivo and in vitro. Additionally, interferon-gamma could induce MiET formation in Listeria-infected microglia in vitro that was mediated by NOX, and there was a positive relationship between the elevated level of IFN-gamma and eDNA and nucleosomes in the brain homogenates and CSF of Listeria meningitis model mice and in the CSF before treatment in clinical Listeria meningitis patients. Together, this is the first report of MiET formation, these findings pave the way for deeper exploration of the innate immune response to pathogens in CNS.
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