自噬
PI3K/AKT/mTOR通路
脂多糖
蛋白激酶B
医学
炎症
药理学
西罗莫司
促炎细胞因子
信号转导
化学
细胞凋亡
免疫学
内科学
生物化学
作者
Lihua Qu,Chao Chen,Wei He,Yangye Chen,Yi Li,Yi Wen,Sichun Zhou,Yiqun Jiang,Xiaoping Yang,Ran Zhang,Li Shen
出处
期刊:PubMed
日期:2019-01-01
卷期号:11 (4): 2042-2055
被引量:79
摘要
Acute lung injury (ALI) is a major pathological issue characterized by serious inflammatory response, and a major clinically critical illness with high morbidity and mortality. Glycyrrhizic acid (GA) is a major bioactive constituent isolated from traditional Chinese herb licorice, which has been reported to have positive effects on inflammation. Nevertheless, the effects of GA on lipopolysaccharide (LPS)-treated ALI in mice have not been reported. The purpose of our study is to investigate the inhibitory effects of GA on ALI treated by LPS and to elucidate its possible mechanisms. We found that GA significantly attenuated lung injury and decreased the production of inflammatory factors TNF-α, IL-1β, and HMGB1 with LPS treatment. GA induced autophagy which was showed by enhanced number of autophagosomes through upregulating the protein levels of LC3-II/I and Beclin-1 and downregulating SQSTM1/P62. Moreover, pre-treatment of 3-Methyladenine (3-MA), an autophagy inhibitor, reversed the inhibiting effects of GA on the secretion of inflammatory factors in ALI. The PI3K/AKT/mTOR pathway was associated with GA-induced autophagy under ALI induced by LPS. In conclusion, this study indicated that GA inhibited the production of inflammatory factors in LPS-induced ALI by regulating the PI3K/AKT/mTOR pathway related autophagy, which may provide a novel therapeutic perspective of GA in ameliorating ALI.
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