The microglial sensome revealed by direct RNA sequencing.

The microglial sensome revealed by direct RNA sequencing.
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DOI:
10.1038/nn.3554
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发表时间:
2013-12
影响因子:
25
通讯作者:
El Khoury, Joseph
El Khoury, Joseph
中科院分区:
医学1区
文献类型:
--
作者:
Hickman, Suzanne E.;Kingery, Nathan D.;Ohsumi, Toshiro K.;Borowsky, Mark L.;Wang, Li-chong;Means, Terry K.;El Khoury, Joseph

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小胶质细胞是大脑的主要神经免疫哨兵,它不断地感知环境的变化,并对入侵的病原体、毒素和细胞碎片做出反应。小胶质细胞表现出可塑性,可以处于神经毒性或神经保护性启动状态,这决定了它们对危险的反应。我们采用RNA直接测序的方法,不需要扩增,也不需要合成DNA,来确定健康成年和老年小鼠小胶质细胞的定量转录。我们通过荧光双原位杂交、无偏蛋白质组学分析和定量聚合酶链式反应验证了我们的发现。我们在这里报道,小胶质细胞有一个独特的转录特征,并表达一组独特的转录本,编码用于感知内源配体和微生物的蛋白质,我们将其称为“感觉体”。随着年龄的增长,内源性配体识别的敏感转录下调,而参与微生物识别和宿主防御的敏感转录上调。此外,衰老与参与神经保护的小胶质细胞基因的整体表达增加有关。
Microglia, the principal neuroimmune sentinels of the brain, continuously sense changes in their environment and respond to invading pathogens, toxins and cellular debris. Microglia exhibit plasticity and can assume neurotoxic or neuroprotective priming states that determine their responses to danger. We used direct RNA sequencing, without amplification or cDNA synthesis, to determine the quantitative transcriptomes of microglia of healthy adult and aged mice. We validated our findings by fluorescent dual in-situ hybridization, unbiased proteomic analysis and quantitative PCR. We report here that microglia have a distinct transcriptomic signature and express a unique cluster of transcripts encoding proteins for sensing endogenous ligands and microbes that we term the “sensome”. With aging, sensome transcripts for endogenous ligand recognition are downregulated, whereas those involved in microbe recognition and host defense are upregulated. In addition, aging is associated with an overall increase in expression of microglial genes involved in neuroprotection.
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发表时间: 2013-01-31
期刊: Nature
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