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Ischemic preconditioning attenuates ischemia/reperfusion injury in rat steatotic liver: role of heme oxygenase-1-mediated autophagy
- Source :
- Oncotarget
- Publication Year :
- 2016
- Publisher :
- Impact Journals, LLC, 2016.
-
Abstract
- // Anding Liu 1,2 , Enshuang Guo 3 , Jiankun Yang 1 , Renlong Li 3 , Yan Yang 1 , Shenpei Liu 1 , Jifa Hu 1 , Xiaojing Jiang 3 , Olaf Dirsch 2 , Uta Dahmen 2 , Jian Sun 4 and Mingwen Ouyang 5 1 Experimental Medicine Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China 2 Experimental Transplantation Surgery, Department of General, Visceral and Vascular Surgery, Friedrich-Schiller-University Jena, Jena, Germany 3 Department of Infectious Diseases, Wuhan General Hospital of Guangzhou Military Command, Wuhan, China 4 Department of Biliopancreatic Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China 5 Department of Anesthesiology, The Fifth Affiliated Hospital, Southern Medical University, Guangzhou, China Correspondence to: Mingwen Ouyang, email: // Keywords : ischemic preconditioning; steatosis; liver ischemia/reperfusion injury; autophagy; heme oxygenase-1, Pathology Section Received : April 25, 2016 Accepted : November 02, 2016 Published : November 10, 2016 Abstract Steatotic livers are more susceptible to ischemia/reperfusion (I/R) injury, which is ameliorated by ischemic preconditioning (IPC). Autophagy possesses protective action on liver I/R injury and declines in steatotic livers. The aim of this study was to test the hypothesis that the increased susceptibility of steatotic livers to I/R injury was associated with defective hepatic autophagy, which could be restored by IPC via heme oxygenase-1 (HO-1) signaling. Obesity and hepatic steatosis was induced using a high fat diet. Obesity impaired hepatic autophagy activity and decreased hepatic HO-1 expression. Induction of HO-1 restored autophagy activity and inhibited calpain 2 activity. Additionally, suppression of calpain 2 activity also restored autophagy activity. Mitochondrial dysfunction and hepatocellular injury were significantly increased in steatotic livers compared to lean livers in response to I/R injury. This increase in sensitivity to I/R injury was associated with defective hepatic autophagy activity in steatotic livers. IPC increased autophagy and reduced mitochondrial dysfunction and hepatocellular damage in steatotic livers following I/R injury. Furthermore, IPC increased HO-1 expression. Inhibition of HO-1 decreased the IPC-induced autophagy, increased calpain 2 activity and diminished the protective effect of IPC against I/R injury. Inhibition of calpain 2 restored autophagic defect and attenuated mitochondrial dysfunction in steatotic livers after I/R. Collectively, IPC might ameliorate steatotic liver damage and restore mitochondrial function via HO-1-mediated autophagy.
- Subjects :
- Male
0301 basic medicine
autophagy
medicine.medical_specialty
Pathology
Time Factors
Ischemia
Mitochondria, Liver
Diet, High-Fat
Transfection
Autophagy-Related Protein 7
Rats, Sprague-Dawley
03 medical and health sciences
0302 clinical medicine
Internal medicine
Pathology Section
steatosis
medicine
Animals
Ischemic Preconditioning
Cells, Cultured
liver ischemia/reperfusion injury
biology
Calpain
business.industry
Autophagy
Fatty liver
heme oxygenase-1
medicine.disease
Research Paper: Pathology
Fatty Liver
Heme oxygenase
Disease Models, Animal
030104 developmental biology
Endocrinology
Liver
Oncology
Reperfusion Injury
030220 oncology & carcinogenesis
Heme Oxygenase (Decyclizing)
Hepatocytes
biology.protein
Ischemic preconditioning
RNA Interference
Steatosis
business
Reperfusion injury
Signal Transduction
Subjects
Details
- ISSN :
- 19492553
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Oncotarget
- Accession number :
- edsair.doi.dedup.....feaadb774155ba667ddf439fa42abba8