The triggering receptor expressed by myeloid cells-1 activates TLR4-MyD88-NF-κB-dependent signaling to aggravate ventilation-induced lung inflammation and injury in mice

被引:0
作者
Xiaoxia Wang
Bijun Luo
Yanyan Lu
Dengge Pang
Jianqiu Zheng
Jianlan Mo
Hui Huang
Jifeng Feng
机构
[1] The Maternal and & Child Health Hospital,Department of Anesthesiology
[2] The Children’s Hospital,undefined
[3] The Obstetrics & Gynecology Hospital of Guangxi Zhuang Autonomous Region,undefined
来源
Cell and Tissue Research | 2018年 / 374卷
关键词
Triggering receptor expressed on myeloid cells-1; Toll-like receptor 4; Ventilator-induced lung injury; Inflammation; Signaling;
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学科分类号
摘要
The triggering receptor expressed by myeloid cells-1 (TREM-1) plays an important role in infectious and autoimmune diseases but how it contributes to ventilation-induced lung injury (VILI) and inflammation is unclear. Here, we examine the possibility that TREM-1 activates signaling dependent on Toll-like receptor 4 (TLR4), myeloid differentiation factor 88 (Myd88) and nuclear factor (NF)-κB, which leads in turn to VILI. In a mouse model of VILI, which we validated based on lung edema and histopathology as well as cytokine levels, we examine mRNA and protein levels of TREM-1, TLR4, MyD88, NF-κB and its inhibitory protein I-κB in animals subjected to ventilation at normal or high tidal volume. The extent of lung edema, injury and inflammation were higher in the high tidal volume animals, as were the expression levels of all proteins examined. Treatment with TREM-1 agonist aggravated these effects, whereas treatment with TREM-1 antagonist attenuated them. Our results suggest that aggravation of VILI by TREM-1 in mice may be associated with TLR4-MyD88-NF-κB-dependent signaling.
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页码:137 / 148
页数:11
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