RNF149通过无处化介导的CD63降解来负面调节LPS/TLR4信号传导
Xiu-An Yang1,2, Yingying Wang1, Mingyu Gong1
1Laboratory of Genetic Engineering and Genomics, School of Basic Medical Sciences, Chengde Medical University, Chengde 067000, China.
Heliyon
|August 6, 2024
概括
通过降解CD63.3,RNF149通过负面调节脂多糖类/托尔类受体4 (LPS/TLR4) 信号传递来降低CD63. 这项研究揭示了RNF149针对CD63的泛化和降解,影响TLR4通路活性.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 脂聚糖 (LPS) 和托尔类受体4 (TLR4) 信号传递对先天免疫和炎症至关重要.
- 拉斯巴宁CD63涉及到各种细胞过程,包括免疫反应.
- RNF149在TLR4信号传递中的作用在很大程度上仍未被描述.
研究的目的:
- 阐明LPS/TLR4信号传导中RNF149和CD63之间的功能关系.
- 为了确定RNF149和CD63如何调节TLR4通路激活.
- 调查RNF149介导的CD63.3调节背后的分子机制.
主要方法:
- 与酶相关的免疫吸收试验 (ELISA) 检测TNF-α.
- 用于TLR4分布的流细胞计.
- 实时PCR用于基因表达.
- 西方涂抹用于蛋白质检测.
- 免疫沉和共聚焦显微镜用于蛋白质相互作用.
- 转录组阵列数据的生物信息分析 (GSE7547).
主要成果:
- RNF149直接与CD63相互作用,并通过在lysine29处的无化对其进行降解.
- CD63促进了LPS/TLR4信号传递,而RNF149则抑制了它.
- RNF149和CD63都与TLR4.4相互作用.
- CD63与Myd88相互作用,但与TIRAP,IRAK4或TRAF6.6没有相互作用.
- CD63的淘汰并没有影响TLR4细胞表面分布.
结论:
- RNF149通过诱导CD63无化和降解,作为LPS/TLR4信号的负调节剂.
- RNF149-CD63轴代表了TLR4介导的炎症反应中的新型调节机制.
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