机构：[1]The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,广东省中医院[2]Affiliated Huai’an Hospital, Xuzhou Medical University, Huai’an, China,[3]Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China,广东省中医院[4]Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
Nrf2 (Nuclear Factor Erythroid 2 Related Factor 2) transcription factor not only regulates oxidative stress response, but also represses inflammation by regulating cytokines production and cross-talking with NF-κB signaling pathways. Nrf2 plays an essential role in liver injury induced by oxidative stress and inflammation. Triptriolide (T11) is a minor component of Tripterygium wilfordii Hook F. (TwHF), which can be obtained by hydrolysis reaction of triptolide (T9). The major purpose of this study is to clarify the regulating effects of T11 on oxidative stress and inflammation in vivo and in vitro. LPS-stimulated RAW 264.7 cells were used to verify the regulating effects of T11 on oxidative stress (ROS and Nrf2 signaling pathway) and inflammatory cytokines production (TNF-α, IL-6 and IL-1β). The antioxidant responsive element (ARE) luciferase assay was employed to evaluate Nrf2 activation effect of T11 in HEK-293T cells. Lipopolysaccharides (LPS) induced acute liver injury (ALI) in BALB/c mice were used to study the protective effects (ALT, AST, MDA, SOD, histopathology and neutrophils/macrophages filtration) and the underlying protection mechanisms of ALI amelioration (Nrf2 and NF-κB signaling pathway) of T11. Firstly, the results showed that T11 can not only effectively decrease the productions of inflammatory cytokines (TNF-α, IL-6 and IL-1β), ROS and NO in LPS-stimulated RAW 264.7 cells, but also further significantly increase the activity of Nrf2 in HEK-293T cells. Secondly, the results suggested that T11 could dramatically decrease the oxidative stress responses (SOD and MDA) and inflammation (histopathology, neutrophils/macrophages filtration, TNF-α, IL-6 and IL-1β production) in LPS-induced ALI in BALB/c mice. Finally, the results implied that T11 could dramatically increase Nrf2 protein expression and decrease p-TAK1, p-IκBα and NF-κB protein expression both in vivo and in vitro. In conclusion, our findings indicated that T11 could alleviate LPS induced oxidative stress and inflammation by regulating Nrf2 and NF-κB signaling pathways in vitro and in vivo, which offers a novel insights for the application of TwHF in clinical.
基金：
This work was financially supported by the National Natural
Science Foundation of China (Nos. 81202398, 81774216,
81703379, and 81574008), the Specific Research Project of
State Administration of TCM of China (No. JDZX2015207),
Guangdong Provincial Science and Technology Project (Nos.
2014A030313400, 2014A020221035, 2015A020211025, and
2015B020211013), Guangzhou Science and Technology Project
(Nos. 201607010338 and 201604016065), the Specific Research
Fund for TCM Science and Technology of Guangdong
Provincial Hospital of Chinese Medicine (Nos. YN2014ZHR209
and YN2015MS03), the Key Project of High-Level University
Construction of Guangzhou University of Chinese Medicine
(Nos. A1-AFD018171Z11097 and A1-AFD018181A34).
基金编号：Nos. 81202398, 81774216,81703379, and 81574008
第一作者机构：[1]The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,
共同第一作者：
通讯作者：
通讯机构：[1]The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China,[3]Guangdong Provincial Academy of Chinese Medical Sciences, Guangzhou, China,
推荐引用方式(GB/T 7714)：
Yi-Qi Yang,Xiao-Teng Yan,Kai Wang,et al.Triptriolide Alleviates Lipopolysaccharide-Induced Liver Injury by Nrf2 and NF-κB Signaling Pathways.[J].FRONTIERS IN PHARMACOLOGY.2018,9:doi:10.3389/fphar.2018.00999.
APA：
Yi-Qi Yang,Xiao-Teng Yan,Kai Wang,Rui-Min Tian,Zhao-Yu Lu...&Bo Liu.(2018).Triptriolide Alleviates Lipopolysaccharide-Induced Liver Injury by Nrf2 and NF-κB Signaling Pathways..FRONTIERS IN PHARMACOLOGY,9,
MLA：
Yi-Qi Yang,et al."Triptriolide Alleviates Lipopolysaccharide-Induced Liver Injury by Nrf2 and NF-κB Signaling Pathways.".FRONTIERS IN PHARMACOLOGY 9.(2018)
