Inhibition of epidermal growth factor receptor attenuates LPS-induced inflammation and acute lung injury in rats
Inhibition of epidermal growth factor receptor attenuates LPS-induced inflammation and acute lung injury in rats
复制标题
表皮生长因子受体的抑制可减轻 LPS 诱导的大鼠炎症和急性肺损伤
DOI：
10.18632/oncotarget.15790
复制
发表时间：
2017-04-18
期刊：
影响因子：
--
通讯作者：
Liang, Guang
中科院分区：
文献类型：
--
作者：
Shan, Xiaoou;Zhang, Yali;Liang, Guang
Acute lung injury (ALI) and its severe form acute respiratory distress syndrome remain the leading cause of morbidity and mortality in intensive care units. Inhibition of epidermal growth factor receptor (EGFR) has been found to be able to reduce inflammatory response. However, it is still unclear whether EGFR inhibition can prevent ALI. This study aimed to validate the EGFR's role in ALI and investigated the effects of EGFR inhibition on lipopolysaccharides (LPS)-induced ALI in rats. In vitro, both pharmacological inhibitors (AG1478 and 451) and si-RNA silencing of EGFR significantly inhibited LPS-induced EGFR signaling activation and inflammatory response in human lung epithelial cells or macrophages. Mechanistically, LPS induced EGFR activation via TLR4 and c-Src signaling. In vivo, rat model with ALI induced by intratracheal instillation of LPS was treated by oral administration of AG1478 and 451. It was observed that AG1478 and 451 blocked the activation of EGFR signaling in lung tissue and reduced the LPS-induced infiltration of inflammatory cells, inflammatory gene expression, and lung injuries. This study demonstrates that TLR4/c-Src-dependent EGFR signaling plays an important role in LPS-induced ALI, and that EGFR may be a potential target in treating ALI.
