酸化p65的血清素536 (RelA) 降低了炎症反应的调节
Tsukasa Aoki1,2, Jing Gao1, Aonan Li1
1Laboratory of Molecular and Cellular Biochemistry, Division of Oral Biological Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
Inflammation
|September 7, 2024
概括
核因子-κB (NF-κB) p65亚单元在血清536 (S536) 的酸化对炎症反应产生负面调节. 在小鼠中将S536转化为氨酸,增强了炎症基因表达和牙周骨损失.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
背景情况:
- 核因子-κB (NF-κB) 是一个关键的转录因子,调节炎症和免疫反应.
- 报告了一种涉及NF-κB p65亚单元酸化的新型机制,该亚单元在氨酸536 (S536) 处酸化,但其生理作用尚不清楚.
研究的目的:
- 研究S536酸化在NF-κB调控中的生理作用.
- 阐明S536酸化对体外和体内炎症和免疫反应的影响.
主要方法:
- 产生S534A敲进 (KI) 鼠标,在p65子单元中用氨酸替换氨酸534 (相当于人类的S536).
- 用瘤缩因子α (TNFα) 刺激小鼠胚胎纤维细胞 (MEF),以分析基因表达.
- 在WT和S534A KI小鼠中建立牙周病模型.
主要成果:
- 由于长时间的p65DNA结合,S534A KI MEFs在TNFα刺激时显示目标基因表达增加.
- 与炎症和免疫反应相关的基因被上调,而与脂解相关的基因在S534A KI MEF中被下调.
- 在牙周病模型中,S534A KI小鼠表现出增强的膜骨再吸收,这与增加的互白素-1β和NF-κB连接体表达的受体激活剂有关.
结论:
- 在NF-κB p65亚单元上对S536的酸化会负面调节炎症反应.
- S536酸化在控制炎症和免疫信号的大小和持续时间方面发挥着至关重要的作用.
- 向S536酸化可能为炎症性疾病提供治疗策略.
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