Infection-induced extracellular vesicles evoke neuronal transcriptional and epigenetic changes.

Infection-induced extracellular vesicles evoke neuronal transcriptional and epigenetic changes.
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DOI:
10.1038/s41598-023-34074-2
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发表时间:
2023-04-27
期刊:
影响因子:
4.6
通讯作者:
--
中科院分区:
综合性期刊3区
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--
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感染原生动物弓形虫会导致神经传递、神经炎症和行为的变化,但这些变化是如何发生的仍然是个谜。在这项研究中,我们研究了感染是如何改变去甲肾上腺素水平的。从受感染的去甲肾上腺素能细胞中分离的弓形虫诱导的神经元胞外小泡(TINEV)下调人和啮齿动物细胞中多巴胺-羟基酶(DBH)基因的表达。在这里,我们报告,脑内注射TINEV足以诱导DBH下调和扰乱儿茶酚胺能信号。此外,TINEV处理诱导了DBH基因上游的高甲基化。在提纯的TINEV制剂中发现了针对胸径的反义IncRNA。旁分泌信号诱导转录基因沉默和DNA甲基化可能是神经功能调节的一种常见模式。
Infection with the protozoan Toxoplasma gondii induces changes in neurotransmission, neuroinflammation, and behavior, yet it remains elusive how these changes come about. In this study we investigated how norepinephrine levels are altered by infection. TINEV (Toxoplasma-induced neuronal extracellular vesicles) isolated from infected noradrenergic cells down-regulated dopamine ß-hydroxylase (DBH) gene expression in human and rodent cells. Here we report that intracerebral injection of TINEVs into the brain is sufficient to induce DBH down-regulation and distrupt catecholaminergic signalling. Further, TINEV treatment induced hypermethylation upstream of the DBH gene. An antisense lncRNA to DBH was found in purified TINEV preparations. Paracrine signalling to induce transcriptional gene silencing and DNA methylation may be a common mode to regulate neurologic function.
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影响因子: --
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