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特罗波莫杜林1通过负面调节LPS诱导的TLR4内细胞分解来加剧巨细胞的炎症反应

Xueyu Geng^1,2, Xue Xia³, Zhenhui Liang^1,2

¹Hemorheology Center, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China.

Cellular and molecular life sciences : CMLS

|September 14, 2024

概括

特罗波莫杜林1 (Tmod1) 阻碍了巨细胞中的托尔类受体4 (TLR4) 内细胞,影响炎症反应. 在败血症模型中,Tmod1缺乏会减轻炎症,这表明Tmod1是治疗点.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
分子医学是分子医学.

背景情况:

败血症是由于长时间的托尔类受体4 (TLR4) 激活而导致过度炎症的结果.
通过CD14介导的TLR4内细胞酶调节细胞表面水平和下游信号,但actin细胞骨的作用尚不清楚.
一种actin capping蛋白Tropomodulin 1 (Tmod1) 正在研究其在TLR4内细胞分裂中的作用.

研究的目的:

阐明Tropomodulin 1 (Tmod1) 在调节巨细胞的Toll-like受体4 (TLR4) 内细胞和炎症信号传递中的作用.
调查Tmod1作为治疗毒症和过度炎症的治疗点的潜力.

主要方法:

研究了Tmod1对脂聚糖 (LPS) 诱导的TLR4内细胞和巨细胞细胞内贩运的影响.
分析了Tmod1对依赖于骨髓分化因子88 (MyD88) 和含有TIR域的适应器诱导干扰素β (TRIF) 的依赖性途径的影响.
在LPS诱导的急性肺损伤小鼠模型中评估了炎症性细胞因子分泌 (TNF-α,IL-6,IFN-β) 和评估了Tmod1-缺乏的巨细胞.

主要成果:

Tmod1抑制了LPS诱导的TLR4内细胞和细胞内贩运,导致表面TLR4增加.
Tmod1调节了MyD88和TRIF通路的活性,增强了促炎性细胞因子 (TNF-α,IL-6) 并减少了抗炎性细胞因子 (IFN-β) 的分泌.
在急性肺损伤小鼠模型中,巨细胞中的Tmod1缺乏改善了炎症反应.

结论:

Tmod1通过调节CD14/Syk/PLCγ2/IP3/Ca2+信号传递,actin细胞骨架重组和膜张力来负面调节TLR4内和炎症反应.
Tmod1是巨细胞免疫功能和炎症反应的关键调节者.
Tmod1代表了治疗过度炎症和败血症的潜在治疗标.

关键词:

细胞骨蛋白质是一种细胞骨蛋白质.内分泌症是指内分泌的形成.炎症反应是一种炎症反应.巨细胞是一个巨细胞.收费类受体4 收费类受体4

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