Curcumin ameliorates oxidative stress-induced intestinal barrier injury and mitochondrial damage by promoting Parkin dependent mitophagy through AMPK-TFEB signal pathway

被引:167
|
作者
Cao, Shuting [1 ]
Wang, Chunchun [1 ]
Yan, Jintao [2 ]
Li, Xin [1 ]
Wen, Jiashu [1 ]
Hu, Caihong [1 ]
机构
[1] Zhejiang Univ, Anim Sci Coll, Key Lab Mol Anim Nutr, Minist Educ, Hangzhou 310058, Peoples R China
[2] Univ Elect Sci & Technol China, Glasgow Coll, Chengdu 611731, Peoples R China
基金
中国国家自然科学基金;
关键词
Curcumin; Oxidative stress; Intestinal injury; Mitochondrial function; Mitophagy; Parkin; AMPK-TFEB; ISCHEMIA-REPERFUSION INJURY; LIVER-INJURY; CELLS; INFLAMMATION; DYSFUNCTION; INTEGRITY; PROTECTS; TIGHT; SUPPRESSION; METABOLISM;
D O I
10.1016/j.freeradbiomed.2019.12.004
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The gut epithelial is known as the most critical barrier for protection against harmful antigens and pathogens. Oxidative stress has been implicated in the dysfunction of the intestine barrier. Hence, effective and safe therapeutic approaches for maintaining intestinal redox balance are urgently needed. Curcumin has gained attention for its vast beneficial biological function via antioxidative stress. However, whether the curcumin can relief intestine damage and mitochondrial injury induced by oxidative stress is still unclear. In this study, we found that curcumin can effectively ameliorate hydrogen peroxide (H2O2)-induced oxidative stress, intestinal epithelial barrier injury and mitochondrial damage in porcine intestinal epithelial cells (IPEC-J2 cells) in a PTEN-induced putative kinase (PINK1)-Parkin mitophagy dependent way. Mechanistically, depletion of Parkin (a mitophagy related protein) abolished curcumin's protective action on anti-oxidative stress, improving intestinal barrier and mitochondrial function in porcine intestinal epithelial cells (IPEC-J2) induced by H2O2. Consistently, the protective effect of curcumin was not found in cells transfected with GFP-Parkin Delta UBL, which encodes a mutant Parkin protein without the ubiquitin E3 ligase activity, indicating that the ubiquitin E3 ligase of Parkin is required for curcumin's protective effects. On the other hand, we also found that the protective function of curcumin was diminished when PRKAA1 was depleted in IPEC-J2 cells treated with H2O2. Immunofluorescence and luciferase assay showed that curcumin dramatically enhanced nuclear translocation and transcriptional activity of transcription factor EB (TFEB) in IPEC-J2 cells treated with H2O2, and it was ameliorated by co-treated with compound C, an Adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK) inhibitor, which means curcumin promotes TFEB transcript via AMPK signal pathway. Consistent with in vitro data, dietary curcumin protected intestinal barrier function, improved redox status, alleviated mitochondrial damage, triggered mitophagy and influenced AMPK-TFEB signal pathway in a well-established pig oxidative stress model by challenging with diquat. Taken together, these results unveil that curcumin ameliorates oxidative stress, enhances intestinal barrier function and mitochondrial function via the induction of Parkin dependent mitophagy through AMPK activation and subsequent TFEB nuclear translocation.
引用
收藏
页码:8 / 22
页数:15
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