调节中性粒细胞的Regnase-1介导调节SARS-CoV-2肺炎
Keiko Yasuda1,2, Junichi Aoki1,3, Kotaro Tanaka1
1Department of Medical Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
PLoS pathogens
|February 9, 2026
概括
降低Regnase-1表达改善了对SARS-CoV-2 MA10感染的抵抗力,通过抑制中性粒细胞过度干扰素反应,减轻肺炎和细胞因子风暴.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 天生的免疫系统必须平衡病原体清除与防止自我损伤.
- 失调的免疫反应,特别是细胞因子的释放,有助于严重的COVID-19.
- 调节酶-1是一种负面调节免疫细胞激活的RNase.
研究的目的:
- 为了调查Regnase-1在SARS-CoV-2感染中的作用.
- 为了确定Regnase-1如何影响病毒感染期间的中性粒细胞功能.
- 确定Regnase-1通过哪些机制影响对SARS-CoV-2的免疫反应.
主要方法:
- 使用了一种适应小鼠的SARS-CoV-2 (MA10) 感染模型.
- 产生并分析了对感染耐药性的Regnase-1+/-小鼠.
- 在肺组织中性粒细胞上进行单细胞RNA测序.
- 研究了Regnase-1和Tsc22d3基因表达之间的调控关系.
主要成果:
- 雷格纳斯-1+/-小鼠对MA10感染表现出耐药性,并减少了肺炎.
- 在Regnase-1+/-小鼠中,中性粒细胞种群表现出功能变化和干扰素刺激基因 (ISG) 表达的减少.
- 确定Regnase-1是Tsc22d3的抑制剂,这是干扰素反应的负调节剂.
- 降低的Regnase-1导致干扰素反应减弱,而不会增加促炎性基因表达.
结论:
- 雷格纳斯-1 负面调节了对SARS-CoV-2 MA10 感染的耐药性.
- 通过Regnase-1介导的中性粒细胞中过度活跃的干扰素反应会加剧病毒性肺炎.
- 准Regnase-1可能为管理严重的COVID-19和相关炎症状况提供治疗策略.
相关概念视频
02:27Predicting Products: SN1 vs. SN2
17.4K
Nucleophilic substitution reactions of alkyl halides can proceed via an SN1 or an SN2 mechanism. While in SN2 reactions, the nucleophile attacks the substrate simultaneously as the leaving group departs, in SN1 reactions, the substrate first dissociates to give the carbocation intermediate. Various factors such as the structure of the substrate, the strength of the nucleophile, and the nature of the solvent promote one mechanism over the other.
With increased substitution on the alkyl halide,...
With increased substitution on the alkyl halide,...
17.4K
01:30Pneumonia I: Introduction
925
Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
925
01:29Pneumonia II: Pathophysiology
3.0K
The pathophysiology of pneumonia involves the following steps:
3.0K
01:20Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
926
Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
926
02:58Regulated Protein Degradation
8.9K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
8.9K
01:261° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
4.0K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
4.0K