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在Brucella Abortus LPS感染期间,TYROBP调节巨细胞中的NFκB酸化和SQSTM1表达

Wenping Wu¹, Wenbo Chen¹, Shicheng Wan¹

¹College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China.

Research in veterinary science

|June 12, 2025

概括

缺少TYROBP蛋白质会损害巨细胞消化,并在布鲁塞拉感染期间恶化线粒体损伤. 由TYROBP对SQSTM1的上调抑制NF-κB酸化,这对于控制细菌感染至关重要.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
微生物学微生物学

背景情况:

TYROBP (DAP12) 是一种信号适应蛋白,对免疫反应至关重要,如炎症和细胞化.
在布鲁塞拉感染中TYROBP的特定作用仍然在很大程度上未被描述.
了解TYROBP的功能对于开发针对布鲁塞拉病变的策略至关重要.

研究的目的:

阐明TYROBP在巨细胞对Brucella abortus感染的反应中的机制.
调查TYROBP-SQSTM1-NFκB信号通路在布鲁塞拉病变发生过程中的作用.

主要方法:

使用Tyrobp-knockout RAW264.7巨细胞来评估细胞和细胞反应.
用Brucella abortus脂多糖 (LPS) 刺激细胞来分析线粒体损伤和NF-κB酸化.
采用定量蛋白质组学来识别TYROBP相互作用伙伴和基因沉默的RNA干扰 (RNAi).

主要成果:

在LPS刺激时,TYROBP基因删除会损害巨细胞化,并加剧线粒体损伤.
定量蛋白质组学确定SQSTM1是一种与TYROBP相互作用的蛋白质,在淘汰细胞中的表达减少.
SQSTM1的枯竭模仿了TYROBP的剥离,导致线粒体功能障碍和NF-κB过度激活.

结论:

TYROBP通过SQSTM1上调抑制NF-κB酸化,从而调节巨细胞激活和细菌清除.
TYROBP-SQSTM1-NFκB通路被认为是布鲁塞拉感染的关键参与者.
这项研究提供了对布鲁塞拉病原体背后的分子机制的新见解.

关键词:

布鲁塞拉病毒是什么?在LPS中使用LPS.在 NFκBB 的情况下.这就是SQSTM1的特点.在TYROBP中,

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