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Yücel HC, Yalçın Y, Akpınar ÖF, Çaylı M, Özdemir İ, Solakoğlu S, Demiröz A, Aksöyler DY. Effectiveness of 1α-25-dihydroxyvitamin D3 active substance on anastomosis safety in the rat femoral artery end-to-end anastomosis experimental model: Macroscopic and histological analyses. J Plast Reconstr Aesthet Surg 2024; 97:310-319. [PMID: 39213932 DOI: 10.1016/j.bjps.2024.08.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 07/22/2024] [Accepted: 08/09/2024] [Indexed: 09/04/2024]
Abstract
Under inflammatory conditions, macrophage dominance affects the degree of inflammation. We assessed the effects of the active vitamin D (calcitriol) administration on inflammatory processes and macrophage dominance and aimed to determine the potential positive macroscopic and histological effects in supermicrosurgical arterial anastomosis model of rats. Forty rats were divided into five groups: control surgery (Group 1), surgery with preoperative (Group 2), post-operative (Group 3), perioperative (Group 4) systemic calcitriol and surgery with local calcitriol (Group 5). Eighty femoral artery anastomoses were planned in both legs of rats. Systemic calcitriol was administered intraperitoneally daily to the animals in the relevant groups. Preoperative vessel diameter measurements were taken before anastomosis. Three weeks post-surgery, post-operative vessel diameter measurements were taken, anastomosis patency was assessed and vascular segments were collected for histological examination, which included assessment of M1 and M2 macrophage depolarisation, leucocyte infiltration, intima-media ratio and luminal gap scoring. Systemic calcitriol administration (pre-, post- or perioperative) significantly improved the vessel diameter (p < 0.001); there was no significant difference among Groups 2-4. Histological findings revealed that Groups 3 and 4 had lower intima-media ratios (p < 0.05 and p < 0.01), higher M2-M1 macrophage ratios (p < 0.01 and p < 0.001) and lower leucocyte infiltration (p < 0.05, p < 0.01 and p < 0.001). Local calcitriol administration had no vasodilatory effects or resulted in positive histological outcomes. Although the administration of calcitriol pre- and post-operatively increased the vessel diameter, the latter appeared to have a more favourable impact on the histological analyses.
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Affiliation(s)
- Hüseyin Can Yücel
- Department of Plastic Reconstructive and Aesthetic Surgery, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Yiğit Yalçın
- Department of Plastic Reconstructive and Aesthetic Surgery, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Ömer Faruk Akpınar
- Department of Plastic Reconstructive and Aesthetic Surgery, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Muhammet Çaylı
- Department of Plastic Reconstructive and Aesthetic Surgery, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - İlkay Özdemir
- Department of Histology and Embryology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Seyhun Solakoğlu
- Department of Histology and Embryology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Anıl Demiröz
- Department of Plastic Reconstructive and Aesthetic Surgery, Cerrahpaşa Medical Faculty Hospital, Istanbul University-Cerrahpaşa, Istanbul, Turkey
| | - Dicle Yaşar Aksöyler
- Department of Plastic Reconstructive and Aesthetic Surgery, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
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Xu C, Fang X, Lu B, Song Y, Shu W, Lu Z, Su R, Xiang Z, Xu X, Wei X. Human umbilical cord mesenchymal stem cells alleviate fatty liver ischemia-reperfusion injury by activating autophagy through upregulation of IFNγ. Cell Biochem Funct 2024; 42:e4040. [PMID: 38850132 DOI: 10.1002/cbf.4040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 04/12/2024] [Accepted: 05/07/2024] [Indexed: 06/10/2024]
Abstract
Liver ischemia-reperfusion injury (IRI) is an important factor affecting the prognosis of liver transplantation, and extended criteria donors (e.g., steatosis donor livers) are considered to be more sensitive to ischemia-reperfusion injury in liver transplantation. Currently, the application of human umbilical cord mesenchymal stem cells (hMSCs) has great promise in the treatment of various injuries in the liver. This study aimed to investigate the therapeutic role and mechanism of hMSCs in fatty liver IRI. After more than 8 weeks of high-fat chow feeding, we constructed a fatty liver mouse model and established ischemic injury of about 70% of the liver. Six hours after IRI, liver injury was significantly alleviated in hMSCs-treated mice, and the expression levels of liver enzyme, inflammatory factor TNF-α, and apoptotic proteins were significantly lower than those of the control group, which were also significant in pathological sections. Transcriptomics analysis showed that IFNγ was significantly upregulated in the hMSCs group. Mechanistically, IFNγ, which activates the MAPK pathway, is a potent agonist that promotes the occurrence of autophagy in hepatocytes to exert a protective function, which was confirmed by in vitro experiments. In summary, hMSCs treatment could slow down IRI in fatty liver by activating autophagy through upregulation of IFNγ, and this effect was partly direct.
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Affiliation(s)
- Chenhao Xu
- Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
| | - Xixi Fang
- Hangzhou Normal University, Hangzhou, China
| | - Bei Lu
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yisu Song
- Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
| | - Wenzhi Shu
- Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
| | - Zhengyang Lu
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
- Zhejiang Chinese Medical University, Hangzhou, China
| | - Renyi Su
- Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
| | - Ze Xiang
- Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
| | - Xiao Xu
- Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
| | - Xuyong Wei
- Department of Hepatobiliary and Pancreatic Surgery, Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province, Hangzhou, China
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Missawi O, Jeddou IB, Venditti M, Zitouni N, Zaouali MA, Abdennebi HB, Messaoudi I, Reiter RJ, Minucci S, Banni M. Environmental microplastic accumulation exacerbates liver ischemia-reperfusion injury in rat: Protective effects of melatonin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 860:160155. [PMID: 36436653 DOI: 10.1016/j.scitotenv.2022.160155] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/18/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Ischemia-reperfusion (IR) injury is an inevitable complication of liver transplantation and partial hepatectomy. Although the hazards of environmental microplastics (EMPs) have been well explored, data underlying their impact on IR-induced hepatotoxicity and how to alleviate these damages remain largely undefined. In this study, the involvement of melatonin (MT) in modulating EMPs toxicity in the liver undergoing ischemia-reperfusion injury was investigated. Male Wistar rats were exposed to MPs for 7 days and then subjected to 1 h of partial warm ischemia (70 %) followed by 24 h of reperfusion. We analyzed some parameters as the oxidative stress, the stability of cytoskeleton as well as inflammation, and autophagy. Our data suggested that EMPs elicited liver injury in ischemic animals. Data revealed several histological alterations caused by EMP and IRI, including cellular disorientation, cell necrosis, and microvacuolar steatosis, as well as inflammatory cell infiltration. EMPs increased blood transaminase (AST and ALT) and oxidative stress levels in the ischemic liver. In addition, RT-qPCR, immunofluorescence, and western blot analyses highlighted an increased expression of α-tubulin, IL-18, NFkB, and LC3. However, the ability of MT to reduce MPs and IRI toxicity was consistent with a significant decrease in the evaluated markers. The combined data not only document that melatonin is an effective agent to protect against hepatic IRI but also reduces cellular dysfunction caused by EMPs.
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Affiliation(s)
- Omayma Missawi
- Laboratory of Agrobiodiversity and Ecotoxicology LR21AGR02, ISA Chott-Mariem, Sousse University, Tunisia; Higher Institute of Biotechnology, Monastir University, Monastir, Tunisia
| | - Ikram Ben Jeddou
- Laboratory of Human Genome and multifactorial Diseases (LR12ES07), Faculty of Pharmacie of Monastisr, Monastir University, Tunisia
| | - Massimo Venditti
- Department of Experimental Medicine, Section Human Physiology and Integrated Biological Functions "F. Bottazzi", University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Nesrine Zitouni
- Laboratory of Agrobiodiversity and Ecotoxicology LR21AGR02, ISA Chott-Mariem, Sousse University, Tunisia; Higher Institute of Biotechnology, Monastir University, Monastir, Tunisia
| | - Mohamed Amin Zaouali
- Laboratory of Human Genome and multifactorial Diseases (LR12ES07), Faculty of Pharmacie of Monastisr, Monastir University, Tunisia
| | - Hassen Ben Abdennebi
- Laboratory of Human Genome and multifactorial Diseases (LR12ES07), Faculty of Pharmacie of Monastisr, Monastir University, Tunisia
| | - Imed Messaoudi
- LR11ES41, Higher Institute of Biotechnology, Monastir University, 5000 Monastir, Tunisia
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, Joe R. and Teresa Lozano Long School of Medicine, UT Health San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA
| | - Sergio Minucci
- Department of Experimental Medicine, Section Human Physiology and Integrated Biological Functions "F. Bottazzi", University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Mohamed Banni
- Laboratory of Agrobiodiversity and Ecotoxicology LR21AGR02, ISA Chott-Mariem, Sousse University, Tunisia; Higher Institute of Biotechnology, Monastir University, Monastir, Tunisia.
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Formononetin Inhibits Hepatic I/R-Induced Injury through Regulating PHB2/PINK1/Parkin Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:6481192. [PMID: 36506934 PMCID: PMC9734001 DOI: 10.1155/2022/6481192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 11/03/2022] [Accepted: 11/17/2022] [Indexed: 12/04/2022]
Abstract
Formononetin (FN), an isoflavone compound mainly isolated from soy and red clover, had showed its anti-inflammation, antioxidative effects in some degenerative diseases and cholestasis. However, the role of FN in protecting ischemia/reperfusion- (I/R-) induced liver injury and the possible mechanism were unclear. In this study, effects of FN on liver injury were investigated in a rat hepatic I/R model; further, mitophagy-related proteins were measured by immunoblotting or immunofluorescence. The possible roles of PHB2 and PINK1 in regulating mitophagy by FN were verified using adeno-associated virus knockdown. The results showed that FN had protective effects against hepatic I/R injury through regulating PINK1/Parkin-regulated mitophagy. Further, we found that FN inhibited PARL expression and prevented PGAM5 cropped by increasing the expression of PHB2. The knockdown of PINK1 or PHB2 both abolished the protective effects of FN. Taken together, our findings indicated that the isoflavone compound FN promoted PHB2/PINK1/Parkin-mediated mitophagy pathway to protect liver from I/R-induced injury. These results provided novel insights into the potential prevention strategies of FN and its underlying mechanisms.
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Ruan S, Yang Y, Li W. Antrodia Camphorata Polysaccharide activates autophagy and regulates NLRP3 degradation to improve liver injury-related inflammatory response. Aging (Albany NY) 2022; 14:8970-8981. [PMID: 36227135 PMCID: PMC9740354 DOI: 10.18632/aging.204330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/26/2022] [Indexed: 12/14/2022]
Abstract
This study illustrated the liver protection mechanism of ACP from the perspective of autophagy activation. ACP suppressed the inflammatory injury of KCs, and decreased the cell apoptosis rate. After LTG and LC3 staining, ACP promoted lysosomal production, increased LC3 expression, activated autophagy, and suppressed the expression of NLRP3 and inflammatory factors. Under the electron microscope, ACP accelerated the production of autophagosomes. After simultaneous treatment with 3-MA and ACP, the effect of ACP on resisting KC injury decreased, the expression of NLRP3 was up-regulated, and autophagy was suppressed. As discovered in the mouse model of liver injury, ACP inhibited the ALT and AST levels, promoted the occurrence of autophagy, reduced NLRP3 expression and alleviated liver injury. ACP activates autophagy to induce NLRP3 degradation, thus suppressing inflammatory response in liver injury and exerting the liver protection effect, which is one of the mechanisms of action of ACP.
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Affiliation(s)
- Shuiliang Ruan
- Department of Gastroenterology, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314001, Zhejiang Province, China
| | - Yi Yang
- Department of Pharmacy, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314001, Zhejiang Province, China
| | - Wenyan Li
- Department of Pharmacy, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314001, Zhejiang Province, China
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Zhang T, Huang W, Ma Y. Down-regulation of TRPM2 attenuates hepatic ischemia/reperfusion injury through activation of autophagy and inhibition of NLRP3 inflammasome pathway. Int Immunopharmacol 2022; 104:108443. [PMID: 35021129 DOI: 10.1016/j.intimp.2021.108443] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/02/2021] [Accepted: 12/03/2021] [Indexed: 11/22/2022]
Abstract
AIM Hepatic ischemia/reperfusion (I/R) injury is a significant pathological process that contributes to high morbidity and mortality rates, although the underlying mechanism is unknown. Recent studies have shown that transient receptor potential melastatin 2 (TRPM2) plays a critical role in organ I/R injury, but the exact mechanism is elusive. This study investigates the role and mechanism of TPRM2 in hepatic I/R injury and oxygen-glucosedeprivation/reoxygenation (OGD/R) induced hepatocyte injury. METHODS We evaluated the effects of TRPM2 on hepatic I/R injury using a knockout mouse model of hepatic I/R. In a model of OGD/R in hepatocytes, we investigated the mechanism of TPRM2 in it using the autophagy agonist and inhibitor and an NLRP3 inhibitor. RESULTS We discovered that knockout of TRPM2 protected against hepatic I/R accompanied by autophagy activation and NLRP3 inflammasome pathway inhibition. Furthermore, increasing autophagy attenuated OGD/R-induced cell injury and knockdown of TRPM2 alleviated the injury by activating autophagy. Additionally, we detected the expression of NLRP3 inflammasome pathway in the OGD/R-induced hepatocytes which had been treated with the autophagy agonist and inhibitor, and found that autophagy negatively regulated the NLRP3 inflammasome pathway. Moreover, we discovered that the administration of NLRP3-inhibitor INF39 increased cell viability and caused a decline in cell death in the OGD/R-treated hepatocytes. CONCLUSIONS Downregulation of TRPM2 protected the liver against I/R injury and OGD/R induced injury, mediated by autophagy activation and inhibition of the NLRP3 inflammasome pathway, whereas autophagy negatively regulated the NLRP3 inflammasome pathway in this process.
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Affiliation(s)
- Tao Zhang
- Department of anesthesiology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Wenqi Huang
- Department of anesthesiology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
| | - Yi Ma
- Organ transplantation center, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
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7
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PEG35 as a Preconditioning Agent against Hypoxia/Reoxygenation Injury. Int J Mol Sci 2022; 23:ijms23031156. [PMID: 35163080 PMCID: PMC8834864 DOI: 10.3390/ijms23031156] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 12/22/2022] Open
Abstract
Pharmacological conditioning is a protective strategy against ischemia/reperfusion injury, which occurs during liver resection and transplantation. Polyethylene glycols have shown multiple benefits in cell and organ preservation, including antioxidant capacity, edema prevention and membrane stabilization. Recently, polyethylene glycol 35 kDa (PEG35) preconditioning resulted in decreased hepatic injury and protected the mitochondria in a rat model of cold ischemia. Thus, the study aimed to decipher the mechanisms underlying PEG35 preconditioning-induced protection against ischemia/reperfusion injury. A hypoxia/reoxygenation model using HepG2 cells was established to evaluate the effects of PEG35 preconditioning. Several parameters were assessed, including cell viability, mitochondrial membrane potential, ROS production, ATP levels, protein content and gene expression to investigate autophagy, mitochondrial biogenesis and dynamics. PEG35 preconditioning preserved the mitochondrial function by decreasing the excessive production of ROS and subsequent ATP depletion, as well as by recovering the membrane potential. Furthermore, PEG35 increased levels of autophagy-related proteins and the expression of genes involved in mitochondrial biogenesis and fusion. In conclusion, PEG35 preconditioning effectively ameliorates hepatic hypoxia/reoxygenation injury through the enhancement of autophagy and mitochondrial quality control. Therefore, PEG35 could be useful as a potential pharmacological tool for attenuating hepatic ischemia/reperfusion injury in clinical practice.
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Hu C, Zhao L, Zhang F, Li L. Regulation of autophagy protects against liver injury in liver surgery-induced ischaemia/reperfusion. J Cell Mol Med 2021; 25:9905-9917. [PMID: 34626066 PMCID: PMC8572770 DOI: 10.1111/jcmm.16943] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 08/10/2021] [Accepted: 09/08/2021] [Indexed: 12/16/2022] Open
Abstract
Transient ischaemia and reperfusion in liver tissue induce hepatic ischaemia/reperfusion (I/R) tissue injury and a profound inflammatory response in vivo. Hepatic I/R can be classified into warm I/R and cold I/R and is characterized by three main types of cell death, apoptosis, necrosis and autophagy, in rodents or patients following I/R. Warm I/R is observed in patients or animal models undergoing liver resection, haemorrhagic shock, trauma, cardiac arrest or hepatic sinusoidal obstruction syndrome when vascular occlusion inhibits normal blood perfusion in liver tissue. Cold I/R is a condition that affects only patients who have undergone liver transplantation (LT) and is caused by donated liver graft preservation in a hypothermic environment prior to entering a warm reperfusion phase. Under stress conditions, autophagy plays a critical role in promoting cell survival and maintaining liver homeostasis by generating new adenosine triphosphate (ATP) and organelle components after the degradation of macromolecules and organelles in liver tissue. This role of autophagy may contribute to the protection of hepatic I/R‐induced liver injury; however, a considerable amount of evidence has shown that autophagy inhibition also protects against hepatic I/R injury by inhibiting autophagic cell death under specific circumstances. In this review, we comprehensively discuss current strategies and underlying mechanisms of autophagy regulation that alleviates I/R injury after liver resection and LT. Directed autophagy regulation can maintain liver homeostasis and improve liver function in individuals undergoing warm or cold I/R. In this way, autophagy regulation can contribute to improving the prognosis of patients undergoing liver resection or LT.
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Affiliation(s)
- Chenxia Hu
- Collaborative Innovation Center for the Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lingfei Zhao
- Key Laboratory of Kidney Disease Prevention and Control Technology, Kidney Disease Center, Institute of Nephrology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Fen Zhang
- Collaborative Innovation Center for the Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lanjuan Li
- Collaborative Innovation Center for the Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for the Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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9
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Wu S, Lu H, Wang W, Song L, Liu M, Cao Y, Qi X, Sun J, Gong L. Prevention of D-GalN/LPS-induced ALI by 18β-glycyrrhetinic acid through PXR-mediated inhibition of autophagy degradation. Cell Death Dis 2021; 12:480. [PMID: 33986260 PMCID: PMC8119493 DOI: 10.1038/s41419-021-03768-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 12/26/2022]
Abstract
Acute liver injury (ALI) has multiple causes and results in liver dysfunction. Severe or persistent liver injury eventually leads to liver failure and even death. Pregnane X receptor (PXR)-null mice present more severe liver damage and lower rates of autophagy. 18β-glycyrrhetinic acid (GA) has been proposed as a promising hepatoprotective agent. We hypothesized that GA significantly alleivates D-GalN/LPS-induced ALI, which involved in PXR-mediated autophagy and lysosome biogenesis. We found that GA can significantly decrease hepatocyte apoptosis and increase the hepatic autophagy marker LC3-B. Ad-mCherry-GFP-LC3 tandem fluorescence, RNA-seq and real-time PCR indicated that GA may stabilize autophagosomes and lysosomes and inhibit autophagosome-lysosome fusion. Simultaneously, GA markedly activates PXR, even reversing the D-GalN/LPS-induced reduction of PXR and its downstream genes. In contrast, GA has a weak protective effect in pharmacological inhibition of PXR and PXR-null mice, which significantly affected apoptosis- and autophagy-related genes. PXR knockout interferes with the stability of autophagosomes and lysosomes, preventing GA reducing the expression of lysosomal genes such as Cst B and TPP1, and suppressing autophagy flow. Therefore, we believe that GA increases autophagy by inhibiting autophagosome-lysosome fusion and blocked autophagy flux via activation of PXR. In conclusion, our results show that GA activates PXR to regulate autophagy and lysosome biogenesis, represented by inhibiting autophagosome-lysosome fusion and stabilization of lysosome. These results identify a new mechanism by which GA-dependent PXR activation reduces D-GalN/LPS-induced acute liver injury.
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Affiliation(s)
- Shouyan Wu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Henglei Lu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Wenjie Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Department of Pharmacology, Fudan University, Shanghai, 201203, China
| | - Luyao Song
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meng Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuhan Cao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinming Qi
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianhua Sun
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Likun Gong
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
- Zhongshan Branch, the Institute of Drug Discovery and Development, Chinese Academy of Sciences, Zhongshan, China.
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Liu L, Liao X, Wu H, Li Y, Zhu Y, Chen Q. Mitophagy and Its Contribution to Metabolic and Aging-Associated Disorders. Antioxid Redox Signal 2020; 32:906-927. [PMID: 31969001 DOI: 10.1089/ars.2019.8013] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Significance: Mitochondria are the cellular powerhouses for ATP synthesis through oxidative phosphorylation, and the centers for fatty acid β-oxidation, metabolite synthesis, reactive oxygen species production, innate immunity, and apoptosis. To fulfill these critical functions, mitochondrial quality and homeostasis must be well maintained. Abnormal mitochondrial quality contributes to aging and age-related disorders, such as metabolic syndrome, cancers, and neurodegenerative diseases. Recent Advances: Mitophagy is a cellular process that selectively removes damaged or superfluous mitochondria by autolysosomal degradation and is regarded as one of the major mechanisms responsible for mitochondrial quality control. Critical Issues: To date, distinct mitophagy pathways have been discovered, including receptor-mediated mitophagy and ubiquitin-dependent mitophagy. Emerging knowledge of these pathways shows that they play important roles in sensing mitochondrial stress and signaling for metabolic adaptations. Future Directions: Here, we provide a review on the molecular mechanisms for mitophagy and its interplay with cellular metabolism, with a particular focus on its role in metabolic and age-related disorders.
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Affiliation(s)
- Lei Liu
- The State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Xudong Liao
- The State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, China
| | - Hao Wu
- The State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Yanjun Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, China
| | - Yushan Zhu
- The State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, China
| | - Quan Chen
- The State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, China
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11
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Zabala V, Boylan JM, Thevenot P, Frank A, Senthoor D, Iyengar V, Kim H, Cohen A, Gruppuso PA, Sanders JA. Transcriptional changes during hepatic ischemia-reperfusion in the rat. PLoS One 2019; 14:e0227038. [PMID: 31891620 PMCID: PMC6938360 DOI: 10.1371/journal.pone.0227038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 12/10/2019] [Indexed: 12/17/2022] Open
Abstract
There are few effective targeted strategies to reduce hepatic ischemia-reperfusion (IR) injury, a contributor to poor outcomes in liver transplantation recipients. It has been proposed that IR injury is driven by the generation of reactive oxygen species (ROS). However, recent studies implicate other mediators of the injury response, including mitochondrial metabolic dysfunction. We examined changes in global gene expression after transient hepatic ischemia and at several early reperfusion times to identify potential targets that could be used to protect against IR injury. Male Wistar rats were subjected to 30 minutes of 70% partial warm ischemia followed by 0, 0.5, 2, or 6 hours of reperfusion. RNA was extracted from the reperfused and non-ischemic lobes at each time point for microarray analysis. Identification of differentially expressed genes and pathway analysis were used to characterize IR-induced changes in the hepatic transcriptome. Changes in the reperfused lobes were specific to the various reperfusion times. We made the unexpected observation that many of these changes were also present in tissue from the paired non-ischemic lobes. However, the earliest reperfusion time, 30 minutes, showed a marked increase in the expression of a set of immediate-early genes (c-Fos, c-Jun, Atf3, Egr1) that was exclusive to the reperfused lobe. We interpreted these results as indicating that this early response represented a tissue autonomous response to reperfusion. In contrast, the changes that occurred in both the reperfused and non-ischemic lobes were interpreted as indicating a non-autonomous response resulting from hemodynamic changes and/or circulating factors. These tissue autonomous and non-autonomous responses may serve as targets to ameliorate IR injury.
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Affiliation(s)
- Valerie Zabala
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, RI, United States of America
- Division of Biology and Medicine, Brown University, Providence, RI, United States of America
| | - Joan M. Boylan
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, RI, United States of America
- Division of Biology and Medicine, Brown University, Providence, RI, United States of America
| | - Paul Thevenot
- Institute of Translational Research, Ochsner Health Systems, New Orleans LA, United States of America
| | - Anderson Frank
- Institute of Translational Research, Ochsner Health Systems, New Orleans LA, United States of America
| | - Dewahar Senthoor
- Warren Alpert Medical School, Providence, RI, United States of America
| | - Varun Iyengar
- Warren Alpert Medical School, Providence, RI, United States of America
| | - Hannah Kim
- Division of Biology and Medicine, Brown University, Providence, RI, United States of America
| | - Ari Cohen
- Institute of Translational Research, Ochsner Health Systems, New Orleans LA, United States of America
| | - Philip A. Gruppuso
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, RI, United States of America
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, United States of America
| | - Jennifer A. Sanders
- Department of Pediatrics, Rhode Island Hospital and Brown University, Providence, RI, United States of America
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI, United States of America
- * E-mail:
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12
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Dusabimana T, Kim SR, Kim HJ, Park SW, Kim H. Nobiletin ameliorates hepatic ischemia and reperfusion injury through the activation of SIRT-1/FOXO3a-mediated autophagy and mitochondrial biogenesis. Exp Mol Med 2019; 51:1-16. [PMID: 31028246 PMCID: PMC6486618 DOI: 10.1038/s12276-019-0245-z] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 01/23/2023] Open
Abstract
Hepatic ischemia and reperfusion injury are characterized by impaired autophagy, mitochondrial dysfunction, and subsequent compromise of cellular homeostasis following hepatic surgery or transplantation. Nobiletin, a natural flavonoid, is a beneficial antioxidant that possesses anti-inflammatory and anti-cancer activities. We investigated the effect of nobiletin on hepatic IR injury and described the underlying mechanisms. C57BL/6 mice were subjected to 60 min of partial hepatic ischemia, treated with nobiletin (5 mg/kg) or vehicle at the start of reperfusion, and killed at 5 h of reperfusion. Hepatic ischemia and reperfusion increased hepatocellular oxidative damage, inflammation, and cell death, but these changes were alleviated upon nobiletin treatment. Nobiletin increased the expression of proteins that control autophagy, mitochondrial dynamics, and biogenesis. Specifically, the SIRT-1/FOXO3a and PGC-1α pathways were activated by nobiletin. IR-induced AKT activation was associated with FOXO3a phosphorylation, which resulted in a significant reduction in the nuclear FOXO3a levels and potentially attenuated autophagy-regulatory gene expression. Nobiletin increased FOXO3a expression and its nuclear translocation via the inhibition of AKT. Specific inhibition of SIRT-1 abolished the protective effect of nobiletin, causing decreased FOXO3a expression, followed by autophagy induction and decreased PGC-1α expression and mitochondrial dynamics. Taken together, our data indicate that SIRT-1 directly mediates the protective effect of nobiletin against hepatic ischemia and reperfusion injury. The activation of autophagy and mitochondrial function through the SIRT-1/FOXO3a and PGC-1α pathways indicate that nobiletin could have therapeutic potential for treating hepatic ischemia and reperfusion injury. Nobiletin, an antioxidant found in citrus peel, may protect the liver from reperfusion injury, damage following blood flow interruption. When blood flow is restricted and then restored, as in transplant, surgery, or shock, cells are injured, largely due to damage to the cellular powerhouses, the mitochondria. Nobiletin is known to have many benefits, including anti-cancer and anti-inflammatory activities, but its mechanism of action is not well understood. Sang Won Park and Hwajin Kim, at the Gyeongsang National University School of Medicine, in Jinju, South Korea, and co-workers, investigated how nobiletin might protect the liver against interruption of blood flow. They found that nobiletin triggered cells to dismantle damaged mitochondria and produce new, functioning mitochondria, greatly reducing liver damage. These results illuminate how nobiletin works and may lead to better treatments for liver reperfusion injury.
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Affiliation(s)
- Theodomir Dusabimana
- Department of Pharmacology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, 52727, Republic of Korea.,Department of Convergence Medical Sciences, Institute of Health Sciences, Gyeongsang National University Graduate School, Jinju, 52727, Republic of Korea
| | - So Ra Kim
- Department of Pharmacology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, 52727, Republic of Korea
| | - Hye Jung Kim
- Department of Pharmacology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, 52727, Republic of Korea.,Department of Convergence Medical Sciences, Institute of Health Sciences, Gyeongsang National University Graduate School, Jinju, 52727, Republic of Korea
| | - Sang Won Park
- Department of Pharmacology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, 52727, Republic of Korea. .,Department of Convergence Medical Sciences, Institute of Health Sciences, Gyeongsang National University Graduate School, Jinju, 52727, Republic of Korea.
| | - Hwajin Kim
- Department of Pharmacology, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, 52727, Republic of Korea.
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13
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Kang SJ, Rhee WJ. Silkworm Storage Protein 1 Inhibits Autophagy-Mediated Apoptosis. Int J Mol Sci 2019; 20:ijms20020318. [PMID: 30646576 PMCID: PMC6359030 DOI: 10.3390/ijms20020318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 12/25/2018] [Accepted: 01/08/2019] [Indexed: 02/02/2023] Open
Abstract
Autophagy is a natural physiological process, and it induces the lysosomal degradation of intracellular components in response to environmental stresses, including nutrient starvation. Although an adequate autophagy level helps in cell survival, excessive autophagy triggered by stress such as starvation leads to autophagy-mediated apoptosis. Chinese hamster ovary (CHO) cells are widely used for producing biopharmaceuticals, including monoclonal antibodies. However, apoptosis induced by high stress levels, including nutrient deficiency, is a major problem in cell cultures grown in bioreactors, which should be overcome. Therefore, it is necessary to develop a method for suppressing excessive autophagy and for maintaining an appropriate autophagy level in cells. Therefore, we investigated the effect of silkworm storage protein 1 (SP1), an antiapoptotic protein, on autophagy-mediated apoptosis. SP1-expressing CHO cells were generated to assess the effect and molecular mechanism of SP1 in suppressing autophagy. These cells were cultured under starvation conditions by treatment with Earle’s balanced salt solution (EBSS) to induce autophagy. We observed that SP1 significantly inhibited autophagy-mediated apoptosis by suppressing caspase-3 activation and reactive oxygen species generation. In addition, SP1 suppressed EBSS-induced conversion of LC3-I to LC3-II and the expression of autophagy-related protein 7. Notably, basal Beclin-1 level was significantly low in the SP1-expressing cells, indicating that SP1 regulated upstream events in the autophagy pathway. Together, these findings suggest that SP1 offers a new strategy for overcoming severe autophagy-mediated apoptosis in mammalian cells, and it can be used widely in biopharmaceutical production.
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Affiliation(s)
- Su Jin Kang
- Division of Bioengineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 406-772, Korea.
| | - Won Jong Rhee
- Division of Bioengineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 406-772, Korea.
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14
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Ke PY. Diverse Functions of Autophagy in Liver Physiology and Liver Diseases. Int J Mol Sci 2019; 20:E300. [PMID: 30642133 PMCID: PMC6358975 DOI: 10.3390/ijms20020300] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 01/05/2019] [Accepted: 01/08/2019] [Indexed: 01/09/2023] Open
Abstract
Autophagy is a catabolic process by which eukaryotic cells eliminate cytosolic materials through vacuole-mediated sequestration and subsequent delivery to lysosomes for degradation, thus maintaining cellular homeostasis and the integrity of organelles. Autophagy has emerged as playing a critical role in the regulation of liver physiology and the balancing of liver metabolism. Conversely, numerous recent studies have indicated that autophagy may disease-dependently participate in the pathogenesis of liver diseases, such as liver hepatitis, steatosis, fibrosis, cirrhosis, and hepatocellular carcinoma. This review summarizes the current knowledge on the functions of autophagy in hepatic metabolism and the contribution of autophagy to the pathophysiology of liver-related diseases. Moreover, the impacts of autophagy modulation on the amelioration of the development and progression of liver diseases are also discussed.
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Affiliation(s)
- Po-Yuan Ke
- Department of Biochemistry & Molecular Biology and Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.
- Liver Research Center, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan.
- Division of Allergy, Immunology, and Rheumatology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan.
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15
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Yao J, Zheng J, Cai J, Zeng K, Zhou C, Zhang J, Li S, Li H, Chen L, He L, Chen H, Fu H, Zhang Q, Chen G, Yang Y, Zhang Y. Extracellular vesicles derived from human umbilical cord mesenchymal stem cells alleviate rat hepatic ischemia-reperfusion injury by suppressing oxidative stress and neutrophil inflammatory response. FASEB J 2018; 33:1695-1710. [PMID: 30226809 DOI: 10.1096/fj.201800131rr] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Mesenchymal stem cells (MSCs) have been reported to exert therapeutic effects on immunoregulation, tissue repair, and regeneration from the bench to the bedside. Increasing evidence demonstrates that extracellular vesicles (EVs) derived from MSCs could contribute to these effects and are considered as a potential replacement for stem cell-based therapies. However, the efficacy and underlying mechanisms of EV-based treatment in hepatic ischemia-reperfusion injury (IRI) remain unclear. Here, we demonstrated that human umbilical cord MSC-EVs (huc-MSC-EVs) could protect against IRI-induced hepatic apoptosis by reducing the infiltration of neutrophils and alleviating oxidative stress in hepatic tissue in vivo. Meanwhile, huc-MSC-EVs reduced the respiratory burst of neutrophils and prevented hepatocytes from oxidative stress-induced cell death in vitro. Interestingly, we found that the mitochondria-located antioxidant enzyme, manganese superoxide dismutase (MnSOD), was encapsulated in huc-MSC-EVs and reduced oxidative stress in the hepatic IRI model. Knockdown of MnSOD in huc-MSCs decreased the level of MnSOD in huc-MSC-EVs and attenuated the antiapoptotic and antioxidant capacities of huc-MSC-EVs, which could be partially rescued by MnSOD mimetic manganese (III) 5,10,15,20-tetrakis (4-benzoic acid) porphyrin (MnTBAP). In summary, these findings provide new clues to reveal the therapeutic effects of huc-MSC-EVs on hepatic IRI and evaluate their preclinical application.-Yao, J., Zheng, J., Cai, J., Zeng, K., Zhou, C., Zhang, J., Li, S., Li, H., Chen, L., He, L., Chen, H., Fu, H., Zhang, Q., Chen, G., Yang, Y., Zhang, Y. Extracellular vesicles derived from human umbilical cord mesenchymal stem cells alleviate rat hepatic ischemia-reperfusion injury by suppressing oxidative stress and neutrophil inflammatory response.
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Affiliation(s)
- Jia Yao
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jun Zheng
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jianye Cai
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Kaining Zeng
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Chaorong Zhou
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jiebin Zhang
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shihui Li
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China
| | - Hui Li
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liang Chen
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liying He
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Huaxin Chen
- Cell-Gene Therapy Translational Medicine Research Center, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Hongyuan Fu
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qi Zhang
- Cell-Gene Therapy Translational Medicine Research Center, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Guihua Chen
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yang Yang
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yingcai Zhang
- Department of Hepatic Surgery and Liver Transplantation Center, The Third Affiliated Hospital, Organ Transplantation Research Center of Guangdong Province, Organ Transplantation Institute, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine, Guangdong Higher Education Institutes, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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16
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Inata Y, Kikuchi S, Samraj RS, Hake PW, O'Connor M, Ledford JR, O'Connor J, Lahni P, Wolfe V, Piraino G, Zingarelli B. Autophagy and mitochondrial biogenesis impairment contribute to age-dependent liver injury in experimental sepsis: dysregulation of AMP-activated protein kinase pathway. FASEB J 2018; 32:728-741. [PMID: 28974562 DOI: 10.1096/fj.201700576r] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Age is an independent risk factor of multiple organ failure in patients with sepsis. However, the age-related mechanisms of injury are not known. AMPK is a crucial regulator of energy homeostasis, which controls mitochondrial biogenesis by activation of peroxisome proliferator-activated receptor-γ coactivator-α (PGC-1α) and disposal of defective organelles by autophagy. We investigated whether AMPK dysregulation might contribute to age-dependent liver injury in young (2-3 mo) and mature male mice (11-13 mo) subjected to sepsis. Liver damage was higher in mature mice than in young mice and was associated with impairment of hepatocyte mitochondrial function, structure, and biogenesis and reduced autophagy. At molecular analysis, there was a time-dependent nuclear translocation of the active phosphorylated catalytic subunits AMPKα1/α2 and PGC-1α in young, but not in mature, mice after sepsis. Treatment with the AMPK activator 5-amino-4-imidazolecarboxamide riboside-1-β-d-ribofuranoside (AICAR) improved liver mitochondrial structure in both age groups compared with vehicle. In loss-of-function studies, young knockout mice with systemic deficiency of AMPKα1 exhibited greater liver injury than did wild-type mice after sepsis. Our study suggests that AMPK is important for liver metabolic recovery during sepsis. Although its function may diminish with age, pharmacological activation of AMPK may be of therapeutic benefit.-Inata, Y., Kikuchi, S., Samraj, R. S., Hake, P. W., O'Connor, M., Ledford, J. R., O'Connor, J., Lahni, P., Wolfe, V., Piraino, G., Zingarelli, B. Autophagy and mitochondrial biogenesis impairment contribute to age-dependent liver injury in experimental sepsis: dysregulation of AMP-activated protein kinase pathway.
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Affiliation(s)
- Yu Inata
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Satoshi Kikuchi
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Ravi S Samraj
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Paul W Hake
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Michael O'Connor
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - John R Ledford
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - James O'Connor
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Patrick Lahni
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Vivian Wolfe
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Giovanna Piraino
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Basilia Zingarelli
- Division of Critical Care Medicine, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
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17
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Martins RM, Teodoro JS, Furtado E, Rolo AP, Palmeira CM, Tralhão JG. Recent insights into mitochondrial targeting strategies in liver transplantation. Int J Med Sci 2018; 15:248-256. [PMID: 29483816 PMCID: PMC5820854 DOI: 10.7150/ijms.22891] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 12/21/2017] [Indexed: 12/22/2022] Open
Abstract
Ischemia/reperfusion (I/R) injury in liver transplantation can disrupt the normal activity of mitochondria in the hepatic parenchyma. This potential dysfunction of mitochondria after I/R injury could be responsible for the initial poor graft function or primary nonfunction observed after liver transplantation. Thus, determining the mechanisms that lead to human hepatic mitochondrial dysfunction might contribute to improving the outcome of liver transplantation. Furthermore, early identification of novel prognostic factors involved in I/R injury could serve as a key endpoint to predict the outcome of liver grafts and also to promote the early adoption of novel strategies that protect against I/R injury. Here, we briefly review recent advances in the study of mitochondrial dysfunction and I/R injury, particularly in relation to liver transplantation. Next, we highlight various pharmacological therapeutic strategies that could be applied, and discuss their relationship to relevant mitochondrion-related processes and targets. Lastly, we note that although considerable progress has been made in our understanding of I/R injury and mitochondrial dysfunction, further investigation is required to elucidate the cellular and molecular mechanisms underlying these processes, thereby identifying biomarkers that can help in evaluating donor organs.
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Affiliation(s)
- Rui Miguel Martins
- Department of Surgery, Instituto Português de Oncologia de Coimbra, Coimbra, Portugal
| | - João Soeiro Teodoro
- Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal; and Center of Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Emanuel Furtado
- Unidade de Transplantação Hepática de Crianças e Adultos, Hospitais da Universidade de Coimbra, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Anabela Pinto Rolo
- Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal; and Center of Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - Carlos Marques Palmeira
- Department of Life Sciences, Faculty of Sciences and Technology, University of Coimbra, Coimbra, Portugal; and Center of Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | - José Guilherme Tralhão
- Department of Surgery A, Hospitais da Universidade de Coimbra, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal; Clínica Universitária de Cirurgia III, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; and Center for Investigation on Environment, Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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18
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Inferring Genes and Biological Functions That Are Sensitive to the Severity of Toxicity Symptoms. Int J Mol Sci 2017; 18:ijms18040755. [PMID: 28368331 PMCID: PMC5412340 DOI: 10.3390/ijms18040755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 03/23/2017] [Accepted: 03/30/2017] [Indexed: 11/16/2022] Open
Abstract
The effective development of new drugs relies on the identification of genes that are related to the symptoms of toxicity. Although many researchers have inferred toxicity markers, most have focused on discovering toxicity occurrence markers rather than toxicity severity markers. In this study, we aimed to identify gene markers that are relevant to both the occurrence and severity of toxicity symptoms. To identify gene markers for each of four targeted liver toxicity symptoms, we used microarray expression profiles and pathology data from 14,143 in vivo rat samples. The gene markers were found using sparse linear discriminant analysis (sLDA) in which symptom severity is used as a class label. To evaluate the inferred gene markers, we constructed regression models that predicted the severity of toxicity symptoms from gene expression profiles. Our cross-validated results revealed that our approach was more successful at finding gene markers sensitive to the aggravation of toxicity symptoms than conventional methods. Moreover, these markers were closely involved in some of the biological functions significantly related to toxicity severity in the four targeted symptoms.
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19
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White CR, Datta G, Giordano S. High-Density Lipoprotein Regulation of Mitochondrial Function. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 982:407-429. [PMID: 28551800 DOI: 10.1007/978-3-319-55330-6_22] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Lipoproteins play a key role in regulating plasma and tissue levels of cholesterol. Apolipoprotein B (apoB)-containing lipoproteins, including chylomicrons, very-low density lipoprotein (VLDL) and low-density lipoprotein (LDL), serve as carriers of triglycerides and cholesterol and deliver these metabolites to peripheral tissues. In contrast, high-density lipoprotein (HDL) mediates Reverse Cholesterol Transport (RCT), a process by which excess cholesterol is removed from the periphery and taken up by hepatocytes where it is metabolized and excreted. Anti-atherogenic properties of HDL have been largely ascribed to apoA-I, the major protein component of the lipoprotein particle. The inflammatory response associated with atherosclerosis and ischemia-reperfusion (I-R) injury has been linked to the development of mitochondrial dysfunction. Under these conditions, an increase in reactive oxygen species (ROS) formation induces damage to mitochondrial structural elements, leading to a reduction in ATP synthesis and initiation of the apoptotic program. Recent studies suggest that HDL-associated apoA-I and lysosphingolipids attenuate mitochondrial injury by multiple mechanisms, including the suppression of ROS formation and induction of autophagy. Other apolipoproteins, however, present in lower abundance in HDL particles may exert opposing effects on mitochondrial function. This chapter examines the role of HDL-associated apolipoproteins and lipids in the regulation of mitochondrial function and bioenergetics.
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Affiliation(s)
- C Roger White
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Geeta Datta
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Samantha Giordano
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA.
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20
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Enhanced nitric oxide-mediated autophagy contributes to the hepatoprotective effects of ischemic preconditioning during ischemia and reperfusion. Nitric Oxide 2016; 58:10-9. [PMID: 27246638 DOI: 10.1016/j.niox.2016.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 05/25/2016] [Accepted: 05/27/2016] [Indexed: 12/19/2022]
Abstract
Ischemic preconditioning (IPC) protects against liver ischemia/reperfusion (I/R) injury. Autophagy is an essential cytoprotective system that is rapidly activated by multiple stressors. Nitric oxide (NO) acts as an inducer of IPC. We examined the impact of autophagy in liver IPC and its regulation by NO. Male C57BL/6 mice were subjected to 60 min of hepatic ischemia followed by 6 h of reperfusion. IPC was achieved for 10 min of ischemia followed by 10 min of reperfusion prior to sustained ischemia. N(ω)-Nitro-l-arginine methyl ester (L-NAME, 15 mg/kg, i.v., all NOS inhibitor) and aminoguanidine (AG, 10 mg/kg, i.v., iNOS inhibitor) were injected 10 min before IPC. SB203580 (10 mg/kg, i.p., p38 inhibitor) was injected 30 min before IPC. I/R increased serum alanine aminotransferase activity. IPC attenuated this increase, which was abolished by L-NAME, but not AG. Microtubule-associated protein-1 light chain 3-II levels increased and p62 protein levels decreased after I/R; these changes were augmented by IPC and abolished by L-NAME. I/R increased liver protein expression of autophagy-related protein (Atg)12-Atg5 complex and lysosome-associated membrane protein-2. IPC augmented the expression of these proteins, which were abolished by L-NAME, but not AG. IPC also augmented the level of phosphorylated p38 MAPK induced by I/R and this phosphorylation was abolished by L-NAME. Our findings suggest that IPC-mediated NO protects against I/R-induced liver injury by enhancing autophagic flux.
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White CR, Giordano S, Anantharamaiah GM. High-density lipoprotein, mitochondrial dysfunction and cell survival mechanisms. Chem Phys Lipids 2016; 199:161-169. [PMID: 27150975 DOI: 10.1016/j.chemphyslip.2016.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 04/22/2016] [Accepted: 04/23/2016] [Indexed: 01/08/2023]
Abstract
Ischemic injury is associated with acute myocardial infarction, percutaneous coronary intervention, coronary artery bypass grafting and open heart surgery. The timely re-establishment of blood flow is critical in order to minimize cardiac complications. Reperfusion after a prolonged ischemic period, however, can induce severe cardiomyocyte dysfunction with mitochondria serving as a major target of ischemia/reperfusion (I/R) injury. An increase in the formation of reactive oxygen species (ROS) induces damage to mitochondrial respiratory complexes leading to uncoupling of oxidative phosphorylation. Mitochondrial membrane perturbations also contribute to calcium overload, opening of the mitochondrial permeability transition pore (mPTP) and the release of apoptotic mediators into the cytoplasm. Clinical and experimental studies show that ischemic preconditioning (ICPRE) and postconditioning (ICPOST) attenuate mitochondrial injury and improve cardiac function in the context of I/R injury. This is achieved by the activation of two principal cell survival cascades: 1) the Reperfusion Injury Salvage Kinase (RISK) pathway; and 2) the Survivor Activating Factor Enhancement (SAFE) pathway. Recent data suggest that high density lipoprotein (HDL) mimics the effects of conditioning protocols and attenuates myocardial I/R injury via activation of the RISK and SAFE signaling cascades. In this review, we discuss the roles of apolipoproteinA-I (apoA-I), the major protein constituent of HDL, and sphingosine 1-phosphate (S1P), a lysosphingolipid associated with small, dense HDL particles as mediators of cardiomyocyte survival. Both apoA-I and S1P exert an infarct-sparing effect by preventing ROS-dependent injury and inhibiting the opening of the mPTP.
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Affiliation(s)
- C Roger White
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Samantha Giordano
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA
| | - G M Anantharamaiah
- The Division of Gerontology, Geriatric Medicine and Palliative Care, University of Alabama at Birmingham, Birmingham, AL, USA; Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
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Xu YB, Zhang PJ, Liu Q, Mao XN, Wang CC. Role of autophagy related protein Beclin 1 in model of hepatic ischemia-reperfusion injury. Shijie Huaren Xiaohua Zazhi 2016; 24:209-214. [DOI: 10.11569/wcjd.v24.i2.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Surgical resection is the optimal treatment for primary liver cancer, but surgery is often faced with recession of the liver function reserve, ischemia-reperfusion injury of the residual liver and other disadvantages. Autophagy is a form of programmed cell death after hepatic ischemia-reperfusion, and its role in ischemia-reperfusion injury is a hotspot of research in recent years. In the experimental research of simulated liver ischemia-reperfusion injury, the variation of autophagy related protein Beclin 1 is often detected, which suggests the change of autophagy activity. Many pretreatment methods have been found to be able to reduce the level of Beclin 1 and relieve the hepatic damage in the model of hepatic ischemia-reperfusion injury. Here we discuss the research progress in understanding the role of Beclin 1 in hepatic ischemia-reperfusion injury.
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Effects of calcitriol on random skin flap survival in rats. Sci Rep 2016; 6:18945. [PMID: 26732750 PMCID: PMC4702169 DOI: 10.1038/srep18945] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 12/01/2015] [Indexed: 12/21/2022] Open
Abstract
Calcitriol, a metabolite of vitamin D, is often used in osteoporosis clinics. However, the material has other bioactivities; for example, it accelerates angiogenesis, has anti-inflammatory properties, and inhibits oxidative stress. We investigated the effects of calcitriol in a random skin flap rat model. “McFarlane flap” models were established in 84 male Sprague Dawley rats, divided into two groups. One group received intraperitoneal injections of calcitriol (2 μg/kg/day) whereas control rats received intraperitoneal injections of saline. The percentage flap survival area and tissue water content were measured 7 days later, which showed that calcitriol improved flap survival area and reduced tissue edema. It also increased the mean vessel density and upregulated levels of VEGF mRNA/protein, both of which promote flap angiogenesis. Moreover, it decreased leukocyte and macrophage infiltration, reduced the inflammatory proteins IL1β and IL6, increased SOD activity, decreased MDA content, and upregulated the level of autophagy. Overall, our results suggest that calcitriol promotes skin flap survival by accelerating angiogenesis, having anti-inflammatory effects, reducing oxidative stress, and promoting autophagy.
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Mitochondrial Dysfunction and Autophagy in Hepatic Ischemia/Reperfusion Injury. BIOMED RESEARCH INTERNATIONAL 2015; 2015:183469. [PMID: 26770970 PMCID: PMC4684839 DOI: 10.1155/2015/183469] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 11/10/2015] [Accepted: 11/11/2015] [Indexed: 12/26/2022]
Abstract
Ischemia/reperfusion (I/R) injury remains a major complication of liver resection, transplantation, and hemorrhagic shock. Although the mechanisms that contribute to hepatic I/R are complex and diverse involving the interaction of cell injury in hepatocytes, immune cells, and endothelium, mitochondrial dysfunction is a cardinal event culminating in hepatic reperfusion injury. Mitochondrial autophagy, so-called mitophagy, is a key cellular process that regulates mitochondrial homeostasis and eliminates damaged mitochondria in a timely manner. Growing evidence accumulates that I/R injury is attributed to defective mitophagy. This review aims to summarize the current understanding of autophagy and its role in hepatic I/R injury and highlight the various therapeutic approaches that have been studied to ameliorate injury.
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Wang T, Wang Q, Song R, Zhang Y, Zhang K, Yuan Y, Bian J, Liu X, Gu J, Liu Z. Autophagy Plays a Cytoprotective Role During Cadmium-Induced Oxidative Damage in Primary Neuronal Cultures. Biol Trace Elem Res 2015; 168:481-9. [PMID: 26041154 DOI: 10.1007/s12011-015-0390-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 05/26/2015] [Indexed: 11/30/2022]
Abstract
Cadmium (Cd) induces significant oxidative damage in cells. Recently, it was reported that autophagy could be induced by Cd in neurons. However, little is known about the role of reactive oxygen species (ROS) during Cd-induced autophagy. In our study, we examined the cross-talk between ROS and autophagy by using N-acetyl cysteine (NAC, an antioxidant) and chloroquine (CQ, a pharmacological inhibitor of autophagy) in a primary rat neuronal cell cultures. We observed accumulation of acidic vesicular organelles and the increased expression of endogenous protein light chain 3 (LC3) in Cd-treated neurons, revealing that Cd induced a high level of autophagy. Moreover, increased levels of ROS were observed in neurons treated with Cd, showing that ROS accumulation was closely associated with neuron's exposure to Cd. Furthermore, we found that autophagy was inhibited by using CQ and/or NAC with further aggravation of mitochondrial damage, lactate dehydrogenase (LDH) leakage and hypoploid apoptotic cell number in Cd-treated neurons. These results proved that autophagy has a cytoprotective role during Cd-induced toxicity in neurons, and it can prevent the oxidative damage. These findings may enable the development of novel therapeutic strategies for neurological diseases.
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Affiliation(s)
- Tao Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Qiwen Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
- Bijie Pilot Area Research Institute of Bijie University, Bijie, 551700, People's Republic of China
| | - Ruilong Song
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Yajing Zhang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Kangbao Zhang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Yan Yuan
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Jianchun Bian
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Xuezhong Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Jianhong Gu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China
| | - Zongping Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, People's Republic of China.
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, People's Republic of China.
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Liu S, Li X. Autophagy inhibition enhances sensitivity of endometrial carcinoma cells to paclitaxel. Int J Oncol 2015; 46:2399-408. [PMID: 25825088 DOI: 10.3892/ijo.2015.2937] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 03/04/2015] [Indexed: 11/06/2022] Open
Abstract
Autophagy has been shown to be involved in cancer cell resistance to chemotherapy. Paclitaxel, a widely used chemotherapeutic drug, was demonstrated to induce autophagy in various cancer cells. Therefore, we sought to evaluate the role of autophagy on the paclitaxel-induced cell death in endometrial carcinoma. In this study, we found that paclitaxel induced autophagy in paclitaxel-insensitive HEC-1A and JEC cells, exhibiting an increased microtubule associated protein 1 light chain 3 (LC3)-II/LC3-I ratio, a decrease in p62/SQSTM1 abundance, the upregulation of Beclin 1 expression and punctate dots of yellow fluorescent protein (YFP)-LC3 in the cytosol. Paclitaxel-mediated cell death was further potentiated by pretreatment with autophagy inhibitor chloroquine (CQ) or shRNA against the autophagic gene beclin 1. Moreover, paclitaxel stimulated reactive oxygen species (ROS) generation, and inhibition of the ROS by antioxidant N-acetyl-cysteine (NAC) blocked paclitaxel-induced autophagy, indicating that paclitaxel-induced autophagy in endometrial carcinoma cells is mediated by ROS. These findings suggest that paclitaxel-elicited autophagic response plays a protective role that impedes the eventual death of endometrial carcinoma cell, and that autophagy-inhibitor therapy could be an effective and potent strategy to improve paclitaxel treatment outcomes in the treatment of endometrial carcinoma.
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Affiliation(s)
- Suiling Liu
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, P.R. China
| | - Xiaomao Li
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, P.R. China
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Autophagy and liver ischemia-reperfusion injury. BIOMED RESEARCH INTERNATIONAL 2015; 2015:417590. [PMID: 25861623 PMCID: PMC4377441 DOI: 10.1155/2015/417590] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 08/21/2014] [Accepted: 09/07/2014] [Indexed: 12/12/2022]
Abstract
Liver ischemia-reperfusion (I-R) injury occurs during liver resection, liver transplantation, and hemorrhagic shock. The main mode of liver cell death after warm and/or cold liver I-R is necrosis, but other modes of cell death, as apoptosis and autophagy, are also involved. Autophagy is an intracellular self-digesting pathway responsible for removal of long-lived proteins, damaged organelles, and malformed proteins during biosynthesis by lysosomes. Autophagy is found in normal and diseased liver. Although depending on the type of ischemia, warm and/or cold, the dynamic process of liver I-R results mainly in adenosine triphosphate depletion and in production of reactive oxygen species (ROS), leads to both, a local ischemic insult and an acute inflammatory-mediated reperfusion injury, and results finally in cell death. This process can induce liver dysfunction and can increase patient morbidity and mortality after liver surgery and hemorrhagic shock. Whether autophagy protects from or promotes liver injury following warm and/or cold I-R remains to be elucidated. The present review aims to summarize the current knowledge in liver I-R injury focusing on both the beneficial and the detrimental effects of liver autophagy following warm and/or cold liver I-R.
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Qi Z, Dong W, Shi W, Wang R, Zhang C, Zhao Y, Ji X, Liu KJ, Luo Y. Bcl-2 phosphorylation triggers autophagy switch and reduces mitochondrial damage in limb remote ischemic conditioned rats after ischemic stroke. Transl Stroke Res 2015; 6:198-206. [PMID: 25744447 DOI: 10.1007/s12975-015-0393-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 01/20/2015] [Accepted: 02/16/2015] [Indexed: 12/12/2022]
Abstract
Autophagy, an important intracellular degradation pathway, has been reported to clear impaired mitochondria and reduce mitochondria-mediated injury in ischemic disease. Our study and other recent investigations have shown that AKT-dependent autophagy contributes to the neuroprotection afforded by limb remote ischemic conditioning (RIC) in experimental stroke. However, how AKT triggers RIC-based autophagy and whether RIC-afforded autophagy is beneficial for mitochondrial function after cerebral ischemia remains unclear. The disruption of the Bcl-2/Beclin1 complex has been reported to trigger autophagy formation in the condition of Bcl-2 phosphorylation at Ser70. We investigated whether Bcl-2 phosphorylation triggers RIC-based autophagy and thereby confers RIC-induced neuroprotection against mitochondrial injury, using a transient cerebral ischemic rat model. We demonstrated that rats undergoing RIC treatment 30 min after the onset of ischemia (I-30) and at reperfusion (R-0) significantly upregulated Bcl-2 phosphorylation. Immunoprecipitation revealed that RIC increased dissociation of the Bcl-2/Beclin1 complex, leading to a higher level of autophagy than in ischemia/reperfusion rats. Furthermore, AKT activation was shown to play a critical role in regulating Bcl-2-mediated autophagy, as an AKT inhibitor (LY294002, AKTi) administered 30 min prior to ischemia significantly suppressed Bcl-2 phosphorylation and Bcl-2/Beclin1 complex dissociation, thereby reducing autophagy in RIC rats. Blocking Bcl-2 phosphorylation-dependent autophagy with AKTi suppressed RIC-afforded protection on mitochondrial potential and mitochondrial-dependent cell death effector pathway. These findings indicate that Bcl-2 phosphorylation and thereby Bcl-2/Beclin1 complex disruption play a crucial role in triggering autophagy and reducing mitochondrial damage in RIC rats after cerebral ischemia and require the involvement of the AKT activation.
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Affiliation(s)
- Zhifeng Qi
- Cerebrovascular Diseases Research Institute, Xuanwu Hospital of Capital Medical University, 45 Changchun Street, Beijing, 100053, China
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Gao L, Lv G, Guo X, Jing Y, Han Z, Zhang S, Sun K, Li R, Yang Y, Wei L. Activation of autophagy protects against cholestasis-induced hepatic injury. Cell Biosci 2014; 4:47. [PMID: 25922659 PMCID: PMC4412295 DOI: 10.1186/2045-3701-4-47] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 08/01/2014] [Indexed: 02/07/2023] Open
Abstract
Background Cholestasis is characterized by an abnormal accumulation of bile acids and causes hepatocellular injury. Recent studies show that autophagy is involved in the pathophysiology of many liver diseases. The potential role of autophagy in preventing cholestatic hepatotoxicity, however, has rarely been investigated. The aim of this study was to examine whether autophagy is involved in the cholestatic hepatotoxicity. Results We found that bile duct ligation (BDL) led to cholestatic liver injury and hepatocytic autophagy activation in the mice. Suppression of autophagy with Chloroquine (CQ) increased liver injury and hepatocytes apoptosis; while activation of autophagy by rapamycin reduced cholestasis hepatotoxicity. In L02 normal liver cells, Glycochenodeoxycholate (GCDC) treatment would induce autophagy. Inhibition of autophagy by CQ could promote GCDC-induced cell apoptosis. In contrast, rapamycin treatment could protect against GCDC-induced cell death. Furthermore, autophagy contributed to the liver cells survival via modulation of reactive oxygen species (ROS). Conclusions These findings indicate that autophagy protects against cholestasis induced liver injury and hepatocyte apoptosis by eliminating ROS accumulation. Our data suggest that enhancement of autophagy may be a therapeutic strategy to mitigate cholestatic liver injury.
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Affiliation(s)
- Lu Gao
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Gang Lv
- Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai, China
| | - Xianling Guo
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Yingying Jing
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Zhipeng Han
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Shanshan Zhang
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Kai Sun
- Central laboratory, Renji hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Rong Li
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Yang Yang
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China
| | - Lixin Wei
- Tumor Immunology and Gene Therapy Center, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, 225 Changhai Road, Shanghai, 200438 China ; Central laboratory, Renji hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Yang Y, Zheng X, Li B, Jiang S, Jiang L. Increased activity of osteocyte autophagy in ovariectomized rats and its correlation with oxidative stress status and bone loss. Biochem Biophys Res Commun 2014; 451:86-92. [PMID: 25063028 DOI: 10.1016/j.bbrc.2014.07.069] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 07/15/2014] [Indexed: 12/22/2022]
Abstract
OBJECTIVES The objectives of the present study were to investigate ovariectomy on autophagy level in the bone and to examine whether autophagy level is associated with bone loss and oxidative stress status. METHODS 36 female Sprague-Dawley rats were randomly divided into sham-operated (Sham), and ovariectomized (OVX) rats treated either with vehicle or 17-β-estradiol. At the end of the six-week treatment, bone mineral density (BMD) and bone micro-architecture in proximal tibias were assessed by micro-CT. Serum 17β-estradiol (E2) level were measured. Total antioxidant capacity (T-AOC), superoxide dismutase (SOD) activity, catalase (CAT) activity in proximal tibia was also determined. The osteocyte autophagy in proximal tibias was detected respectively by Transmission Electron Microscopy (TEM), immunofluorescent histochemistry (IH), realtime-PCR and Western blot. In addition, the spearman correlation between bone mass, oxidative stress status, serum E2 and autophagy were analyzed. RESULTS Ovariectomy increased Atg5, LC3, and Beclin1 mRNA and proteins expressions while decreased p62 expression. Ovariectomy also declined the activities of T-AOC, CAT, and SOD. Treatment with E2 prevented the reduction in bone mass as well as restored the autophagy level. Furthermore, LC3-II expression was inversely correlated with T-AOC, CAT, and SOD activities. A significant inverse correlation between LC3-II expression and BV/TV, Tb.N, BMD in proximal tibias was found. CONCLUSIONS Ovariectomy induced oxidative stress, autophagy and bone loss. Autophagy of osteocyte was inversely correlated with oxidative stress status and bone loss.
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Affiliation(s)
- Yuehua Yang
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China.
| | - Xinfeng Zheng
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China.
| | - Bo Li
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China.
| | - Shengdan Jiang
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China.
| | - Leisheng Jiang
- Department of Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai 200092, China.
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N-acetyl-serotonin protects HepG2 cells from oxidative stress injury induced by hydrogen peroxide. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:310504. [PMID: 25013541 PMCID: PMC4074966 DOI: 10.1155/2014/310504] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 04/10/2014] [Accepted: 05/03/2014] [Indexed: 12/12/2022]
Abstract
Oxidative stress plays an important role in the pathogenesis of liver diseases. N-Acetyl-serotonin (NAS) has been reported to protect against oxidative damage, though the mechanisms by which NAS protects hepatocytes from oxidative stress remain unknown. To determine whether pretreatment with NAS could reduce hydrogen peroxide- (H2O2-) induced oxidative stress in HepG2 cells by inhibiting the mitochondrial apoptosis pathway, we investigated the H2O2-induced oxidative damage to HepG2 cells with or without NAS using MTT, Hoechst 33342, rhodamine 123, Terminal dUTP Nick End Labeling Assay (TUNEL), dihydrodichlorofluorescein (H2DCF), Annexin V and propidium iodide (PI) double staining, immunocytochemistry, and western blot. H2O2 produced dramatic injuries in HepG2 cells, represented by classical morphological changes of apoptosis, increased levels of malondialdehyde (MDA) and intracellular reactive oxygen species (ROS), decreased activity of superoxide dismutase (SOD), and increased activities of caspase-9 and caspase-3, release of cytochrome c (Cyt-C) and apoptosis-inducing factor (AIF) from mitochondria, and loss of membrane potential (ΔΨm). NAS significantly inhibited H2O2-induced changes, indicating that it protected against H2O2-induced oxidative damage by reducing MDA levels and increasing SOD activity and that it protected the HepG2 cells from apoptosis through regulating the mitochondrial apoptosis pathway, involving inhibition of mitochondrial hyperpolarization, release of mitochondrial apoptogenic factors, and caspase activity.
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Qi Z, Yan F, Shi W, Zhang C, Dong W, Zhao Y, Shen J, Ji X, Liu KJ, Luo Y. AKT-related autophagy contributes to the neuroprotective efficacy of hydroxysafflor yellow A against ischemic stroke in rats. Transl Stroke Res 2014; 5:501-9. [PMID: 24804941 DOI: 10.1007/s12975-014-0346-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 04/23/2014] [Accepted: 04/27/2014] [Indexed: 12/14/2022]
Abstract
Hydroxysafflor yellow A (HSYA) has been approved clinically for treating cardiac patients in China since 2005. Recent studies have indicated that HSYA may be neuroprotective at 24 h in experimental stroke models. Autophagy is a vital degradation pathway of damaged intracellular macromolecules or organelles to maintain homeostasis in physiological or pathological conditions. The purpose of this study is to investigate the neuroprotection of HSYA at 72 h and its mechanism via activating the autophagy pathway using an acute ischemic-reperfusion stroke rat model. Rats were treated with HSYA (2 mg/kg) during 90 min middle cerebral artery occlusion/72 h reperfusion by intravenous administration at four different time points (15 min post-ischemia, 15 min, 24 h, and 48 h post reperfusion), mimicking the potential treatment for acute ischemic stroke. HSYA administration reduced infarction volume and improved various neurological functions at 72 h of reperfusion. The possible molecular mechanism was investigated. We found that HSYA activated the AKT-autophagy pathway in penumbra tissue, which occurred in neuronal-specific cells. Moreover, blocking the AKT-autophagy pathway by an AKT inhibitor abolished HSYA-induced neuroprotection after cerebral ischemia. HSYA may be a promising drug for treating acute ischemic stroke and the AKT-dependent autophagy pathway contributes to the HSYA-afforded neuroprotection.
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Affiliation(s)
- Zhifeng Qi
- Cerebrovascular Diseases Research Institute, Xuanwu Hospital of Capital Medical University, 45 Changchun Street, Beijing, 100053, China
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Ni Z, Wang B, Dai X, Ding W, Yang T, Li X, Lewin S, Xu L, Lian J, He F. HCC cells with high levels of Bcl-2 are resistant to ABT-737 via activation of the ROS-JNK-autophagy pathway. Free Radic Biol Med 2014; 70:194-203. [PMID: 24576507 DOI: 10.1016/j.freeradbiomed.2014.02.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 02/09/2014] [Accepted: 02/13/2014] [Indexed: 12/19/2022]
Abstract
The Bcl-2 inhibitor ABT-737 has shown promising antitumor efficacy in vivo and in vitro. However, some reports have demonstrated that HCC cells are resistant to ABT-737, and the corresponding molecular mechanisms of this resistance are not well known. In this study, we found that HCC cells with high levels of Bcl-2 were markedly resistant to ABT-737 compared to HCC cells with low levels of Bcl-2. In HCC cells with high levels of Bcl-2 (such as HepG2 cells), ABT-737 induced protective autophagy via the sequential triggering of reactive oxygen species (ROS) accumulation, short-term activation of JNK, enhanced phosphorylation of Bcl-2, and dissociation of Beclin 1 from the Bcl-2/Beclin 1 complex. Moreover, autophagy suppressed the overactivation of the ROS-JNK pathway and protected against apoptosis. In HCC cells with low levels of Bcl-2 (i.e., Huh7 cells), ABT-737 induced apoptosis via the sequential stimulation of ROS, sustained activation of JNK, enhanced translocation of Bax from the cytosol to the mitochondria, and release of cytochrome c. In sum, this study indicated that the activation of the ROS-JNK-autophagy pathway may be an important mechanism by which HCC cells with high levels of Bcl-2 are resistant to ABT-737.
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Affiliation(s)
- Zhenhong Ni
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
| | - Bin Wang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
| | - Xufang Dai
- Department of Educational Science College, Chongqing Normal University, Chongqing 400038, China
| | - Wen Ding
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
| | - Ting Yang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
| | - Xinzhe Li
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China
| | - Seth Lewin
- Department of Molecular Biosciences and Department of Radiation Oncology, University of Kansas Cancer Center, University of Kansas, Lawrence, KS 66045-7534, USA
| | - Liang Xu
- Department of Molecular Biosciences and Department of Radiation Oncology, University of Kansas Cancer Center, University of Kansas, Lawrence, KS 66045-7534, USA
| | - Jiqin Lian
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China.
| | - Fengtian He
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Third Military Medical University, Chongqing 400038, China.
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Gracia-Sancho J, Guixé-Muntet S, Hide D, Bosch J. Modulation of autophagy for the treatment of liver diseases. Expert Opin Investig Drugs 2014; 23:965-77. [DOI: 10.1517/13543784.2014.912274] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jordi Gracia-Sancho
- Barcelona Hepatic Hemodynamic Laboratory, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) – Hospital Clínic de Barcelona – CIBEREHD,
Barcelona, Spain ;
| | - Sergi Guixé-Muntet
- Barcelona Hepatic Hemodynamic Laboratory, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) – Hospital Clínic de Barcelona – CIBEREHD,
Barcelona, Spain ;
| | - Diana Hide
- Barcelona Hepatic Hemodynamic Laboratory, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) – Hospital Clínic de Barcelona – CIBEREHD,
Barcelona, Spain ;
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35
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Shi YB. The 2013 Ming K Jeang award for excellence in Cell & Bioscience. Cell Biosci 2014; 4:15. [PMID: 24655893 PMCID: PMC3977949 DOI: 10.1186/2045-3701-4-15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 02/20/2014] [Indexed: 11/10/2022] Open
Abstract
Two research groups led by Yihong Ye of National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, MD, USA and Dr. Lixin Wei of Medical Sciences Research Center, Renji hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China, won the 2013 Ming K Jeang Award for Excellence in Cell & Bioscience.
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Affiliation(s)
- Yun-Bo Shi
- The National Institutes of Health, Bethesda, MD, USA.
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36
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Abstract
Studies performed in the liver in the 1960s led to the identification of lysosomes and the discovery of autophagy, the process by which intracellular proteins and organelles are degraded in lysosomes. Early studies in hepatocytes also uncovered how nutritional status regulates autophagy and how various circulating hormones modulate the activity of this catabolic process in the liver. The intensive characterization of hepatic autophagy over the years has revealed that lysosome-mediated degradation is important not only for maintaining liver homeostasis in normal physiological conditions, but also for an adequate response of this organ to stressors such as proteotoxicity, metabolic dysregulation, infection and carcinogenesis. Autophagic malfunction has also been implicated in the pathogenesis of common liver diseases, suggesting that chemical manipulation of this process might hold potential therapeutic value. In this Review--intended as an introduction to the topic of hepatic autophagy for clinical scientists--we describe the different types of hepatic autophagy, their role in maintaining homeostasis in a healthy liver and the contribution of autophagic malfunction to liver disease.
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37
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Xu H, Xiong S, Wang H, Zhang M, Yu Y. The evidence and the possible significance of autophagy in degeneration model of human cervical end-plate cartilage. Exp Ther Med 2013; 7:537-542. [PMID: 24520242 PMCID: PMC3919868 DOI: 10.3892/etm.2013.1465] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 12/02/2013] [Indexed: 01/20/2023] Open
Abstract
The aim of this study was to observe autophagy in chondrocytes from degenerative human cervical vertebral end-plates and to investigate the significance of variations in autophagy in the degeneration of cervical vertebral end-plate chondrocytes. Cartilage end-plates were obtained from 48 inpatients admitted to hospital between February 2011 and August 2012. The patients were divided into the control group (n=17) with cervical vertebral fracture or dislocation and the cervical spondylosis group (n=31) with cervical spondylotic myelopathy. End-plate chondrocytes were isolated via enzyme digestion and then cultured in vitro. The cells were stained with toluidine blue and hematoxylin-eosin (H&E). A laser scanning confocal microscope and monodansylcadaverine (MDC) were used to reveal autophagy in the end-plate chondrocytes. Reverse transcription polymerase chain reaction (RT-PCR) was used to detect mRNA expression of type II collagen and aggrecan. Western blotting was conducted to detect LC3 proteins. The chondrocytes isolated from the degenerative human cervical end-plates were cultured successfully in vitro. The morphology of the cells from the cervical spondylosis group tended to exhibit changes in spindle morphology compared with the control group. Autophagic bodies were stained with MDC. LC3 proteins were visible in the intracellular and perinuclear regions under the laser scanning confocal microscope. The mRNA expression levels (relative to those of β-actin) of aggrecan (0.715±0.194) and type II collagen (0.628±0.254) in the cervical spondylosis group were markedly decreased compared with those in the control group (0.913±0.254 and 0.845±0.186, respectively; both P<0.05). The LC3-II/LC3-I ratio was observed to be significantly reduced in the cervical spondylosis group by Western blot analysis. Autophagy has an important role in human cervical disc degeneration. The regulation of autophagy may prevent disc degeneration in cartilage end-plate cells.
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Affiliation(s)
- Hongguang Xu
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
| | - Shouliang Xiong
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
| | - Hong Wang
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
| | - Min Zhang
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
| | - Yunfei Yu
- Department of Orthopedic Surgery, Yijishan Hospital, Wannan Medical College, Wuhu, Anhui 241001, P.R. China
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