矩阵金属蛋白酶-8通过核因子kappa-B p65/β-catenin通路调节晚期多微生物败血症中的树突细胞耐受性
Zhong-Qiu Lu1, Chen Zhang1, Lin-Jun Zhao1,2
1Department of Emergency Medicine, The First Affiliated Hospital of Wenzhou Medical University, Fanhai West Road, Ouhai District, Wenzhou 325000, China.
Burns & trauma
|March 1, 2024
概括
矩阵金属蛋白酶-8 (MMP8) 驱动了树突细胞 (DC) 中的败血症诱导的免疫耐受性. 减少MMP8可以通过恢复免疫反应来防止败血症致死率和器官功能障碍.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物化学 生化学
背景情况:
- 宽容性树突细胞 (DCs) 与败血症预后不佳有关.
- 矩阵金属蛋白酶 (MMPs) 具有免疫调节功能,但它们在败血症期间DC重编程中的作用尚不清楚.
研究的目的:
- 调查MMPs在败血症引起的DC耐受性中的作用.
- 阐明MMPs在败血症中对DC功能重编程作出贡献的机制.
主要方法:
- 在小鼠的结和穿孔 (CLP) 模型中诱导晚期败血症.
- 微阵列分析检测MMP家族表达在败血症诱导的宽容性DCs.
- 在实验室和体内评估MMP8在DC分化,成熟和重编程中的作用.
主要成果:
- 败血症引起的DCs显示MMP8,MMP9,MMP14,MMP19,MMP25和MMP27的水平升高,其中MMP8是最突出的.
- 在体内和体外,MMP8缺乏改善了败血症诱导的DC免疫耐受性.
- 采用MMP8敲击DCs的转移改善了败血症生存率,减少了器官功能障碍,抑制了调节性T细胞,并增强了Th1反应.
结论:
- 败血性直流体中MMP8升高可能起到负反机制的作用.
- 这种反循环抑制了促炎反应,并在败血症期间诱导了DC耐受性.
- MMP8对DC耐受性的影响与核因子kappa-B p65/β-catenin通路有关.
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