细胞外蛋白作为与败血症相关的大脑损伤的潜在生物标志物
Jinlan Dong1, Shuang Wang1, Zhonghua Hu1
1Department of Anesthesiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China.
Frontiers in immunology
|October 30, 2023
概括
研究人员确定了关键的细胞外蛋白,S100A8和MMP8,作为感染性脑病变 (SAE) 的潜在生物标志物. 升高的S100A8水平可以准确预测SAE的严重程度和死亡率,为改善诊断和预后提供希望.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 生物化学 生化学
背景情况:
- 败血性脑病 (SAE) 是败血症的严重并发症,与增加的死亡率和不良结果有关.
- 目前,缺乏用于诊断和预测SAE的客观临床标志物.
- 这项研究调查了与败血症引起的脑损伤有关的基因和细胞外蛋白,以找到SAE生物标志物.
研究的目的:
- 识别与败血性脑病 (SAE) 相关的新型细胞外蛋白差异表达基因 (EP-DEGs).
- 评估已识别的EP-DEG在败血症患者和动物模型中的诊断和预后潜力.
- 阐明这些蛋白质在败血症引起的大脑损伤的病理生理学中的作用.
主要方法:
- 使用基因表达综合 (GEO) 数据库,分析来自败血症患者脑组织的EP-DEG.
- 使用基因本体学 (GO) 和KEGG.使用EP-DEGs的功能和途径分析.
- 构建蛋白质与蛋白质相互作用 (PPI) 网络,以确定关键的EP-DEGs.
- 在人类血液样本和大鼠败血症模型中验证关键的EP-DEGs (结和穿刺 - CLP).
- 在CLP后的老鼠中评估认知和空间记忆.
主要成果:
- 确定了31个EP-DEG,其功能与免疫反应相关,如中性粒细胞迁移.
- 与对照组相比,败血症大鼠在血液和脑脊液中显示MMP8和S100A8蛋白水平升高.
- 在人体外围血液中发现了四种关键的细胞外蛋白质 (MMP8,CSF3,IL-6,S100A8).
- 对于SAE,S100A8显示出高诊断准确度 (AUC:0.962),具有80%的灵敏度和100%的特异性.
- 高S100A8水平与28天死亡率和较低的格拉斯哥昏迷表 (GCS) 评分有显著的相关性.
结论:
- 细胞外蛋白MMP8,CSF3,IL-6和S100A8可能参与SAE病理生理学.
- 作为SAE发病和进展的生物标志物,MMP8和S100A8显示出有前途.
- 这项研究有助于了解SAE病原体,并可能改善临床诊断和预后.
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