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Guo B, Ma B, Li M, Li Y, Liang P, Han D, Yan X, Hu S. The nitration of SIRT6 aggravates neuronal damage during cerebral ischemia-reperfusion in rat. Nitric Oxide 2024:S1089-8603(24)00123-X. [PMID: 39374645 DOI: 10.1016/j.niox.2024.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 10/03/2024] [Accepted: 10/04/2024] [Indexed: 10/09/2024]
Abstract
Ischemic stroke is a major cause of death and disability. The activation of neuronal nitric oxide synthase (nNOS) and the resulting production of nitric oxide (NO) via NMDA receptor-mediated calcium influx play an exacerbating role in cerebral ischemia reperfusion injury. The NO rapidly reacts with superoxide (O2-) to form peroxynitrite (ONOO-), a toxic molecule may modify proteins through tyrosine residue nitration, ultimately worsening neuronal damage. SIRT6 has been proven to be crucial in regulating cell proliferation, death, and aging in various pathological settings. We have previous reported that human SIRT6 tyrosine nitration decreased its intrinsic catalytic activity in vitro. However, the exact role of SIRT6 function in the process of cerebral ischemia reperfusion injury is not yet fully elucidated. Herein, we demonstrated that an increase in the nitration of SIRT6 led to reduce its enzymatic activity and aggravated hippocampal neuronal damage in a rat model of four-artery cerebral ischemia reperfusion. In addition, reducing SIRT6 nitration resulted in increase the activity of SIRT6, alleviating hippocampal neuronal damage. Moreover, SIRT6 nitration affected its downstream molecule activity such as PARP1 and GCN5, promoting the process of neuronal ischemic injury in rat hippocampus. Additionally, treatment with NMDA receptor antagonist MK801, or nNOS inhibitor 7-NI, and resveratrol (an antioxidant) diminished SIRT6 nitration and the catalytic activity of downstream molecules like PARP1 and GCN5, thereby reducing neuronal damage. Finally, in the biochemical regulation of SIRT6 activity, tyrosine 257 was essential for its activity and susceptibility to nitration. Replacing tyrosine 257 with phenylalanine in rat SIRT6 attenuated the death of SH-SY5Y neurocytes under oxygen-glucose deprivation (OGD) conditions. These results may offer further understanding of SIRT6 function in the pathogenesis of cerebral ischemic diseases.
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Affiliation(s)
- Bingnan Guo
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Emergency Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, China
| | - Bin Ma
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Nuclear Medicine, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, 471000, China
| | - Ming Li
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Emergency Medicine, The General Hospital of Xuzhou Mining Group, Xuzhou, Jiangsu, 221006, China
| | - Yuxin Li
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China
| | - Pengchong Liang
- Department of Emergency Medicine, Central Hospital of Baoji City, Baoji, Shanxi,721008, China
| | - Dong Han
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Emergency Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, China
| | - Xianliang Yan
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Emergency Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Emergency Medicine, Suining People's Hospital, Xuzhou, Jiangsu, 221000, China.
| | - Shuqun Hu
- The Laboratory of Emergency Medicine, School of Second Clinical Medicine, Xuzhou Medical University, Xuzhou, Jiangsu 221002, China; Department of Emergency Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu 221002, China.
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Yang Q, He WH, Xie L, Chen T, Liu RF, Hu JJ, Guo JY, Tan GZ, Wu FL, Gu P, Chen P, Chen Y. Oral administration of astilbin mitigates acetaminophen-induced acute liver injury in mice by modulating the gut microbiota. Acta Pharmacol Sin 2024:10.1038/s41401-024-01383-9. [PMID: 39313515 DOI: 10.1038/s41401-024-01383-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 08/16/2024] [Accepted: 08/18/2024] [Indexed: 09/25/2024] Open
Abstract
Acetaminophen (APAP) overdose-induced acute liver injury (ALI) is characterized by extensive oxidative stress, and the clinical interventions for this adverse effect remain limited. Astilbin is an active compound found in the rhizome of Smilax glabra Roxb. with anti-inflammatory and antioxidant activities. Due to its low oral bioavailability, astilbin can accumulate in the intestine, which provides a basis for the interaction between astilbin and gut microbiota (GM). In the present study we investigated the protective effects of astilbin against APAP-induced ALI by focusing on the interaction between astilbin and GM. Mice were treated with astilbin (50 mg·kg-1·d-1, i.g.) for 7 days. After the last administration of astilbin for 2 h, the mice received APAP (300 mg/kg, i.g.) to induce ALI. We showed that oral administration of astilbin significantly alleviated APAP-induced ALI by altering the composition of GM and enriching beneficial metabolites including hydroxytyrosol (HT). GM depletion using an "antibiotics cocktail" or paraoral administration of astilbin abolished the hepatoprotective effects of astilbin. On the other hand, administration of HT (10 mg/kg, i.g.) caused similar protective effects in APAP-induced ALI mice. Transcriptomic analysis of the liver tissue revealed that HT inhibited reactive oxygen species and inflammation-related signaling in APAP-induced ALI; HT promoted activation of the Nrf2 signaling pathway to combat oxidative stress following APAP challenge in a sirtuin-6-dependent manner. These results highlight that oral astilbin ameliorates APAP-induced ALI by manipulating the GM and metabolites towards a more favorable profile, and provide an alternative therapeutic strategy for alleviating APAP-induced ALI.
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Affiliation(s)
- Qin Yang
- Department of Gastroenterology, The Seventh Affiliated Hospital of Southern Medical University, Foshan, 528244, China
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Wen-Hao He
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Li Xie
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Tao Chen
- Department of Physiology, School of Basic Medical Sciences, Gannan Medical University, Ganzhou, 341000, China
| | - Ruo-Fan Liu
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Jia-Jia Hu
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Jia-Yin Guo
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Guo-Zhu Tan
- Department of Gastroenterology, The Seventh Affiliated Hospital of Southern Medical University, Foshan, 528244, China
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Biomaterials Research Center, School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Fu-Ling Wu
- Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Peng Gu
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.
| | - Peng Chen
- Department of Pathophysiology, Guangdong Provincial Key Laboratory of Proteomics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China.
| | - Yu Chen
- Department of Gastroenterology, The Seventh Affiliated Hospital of Southern Medical University, Foshan, 528244, China.
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He J, Feng L, Yang H, Gao S, Dong J, Lu G, Liu L, Zhang X, Zhong K, Guo S, Zha G, Han L, Li H, Wang Y. Sirtuin 5 alleviates apoptosis and autophagy stimulated by ammonium chloride in bovine mammary epithelial cells. Exp Ther Med 2024; 28:295. [PMID: 38827477 PMCID: PMC11140291 DOI: 10.3892/etm.2024.12584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 03/28/2024] [Indexed: 06/04/2024] Open
Abstract
Ammonia (NH3) is an irritating and harmful gas that affects cell apoptosis and autophagy. Sirtuin 5 (SIRT5) has multiple enzymatic activities and regulates NH3-induced autophagy in tumor cells. In order to determine whether SIRT5 regulates NH3-induced bovine mammary epithelial cell apoptosis and autophagy, cells with SIRT5 overexpression or knockdown were generated and in addition, bovine mammary epithelial cells were treated with SIRT5 inhibitors. The results showed that SIRT5 overexpression reduced the content of NH3 and glutamate in cells by inhibiting glutaminase activity in glutamine metabolism, and reduced the ratio of ADP/ATP. The results in the SIRT5 knockdown and inhibitor groups were comparable, including increased content of NH3 and glutamate in cells by activating glutaminase activity, and an elevated ratio of ADP/ATP. It was further confirmed that SIRT5 inhibited the apoptosis and autophagy of bovine mammary epithelial cells through reverse transcription-quantitative PCR, western blot, flow cytometry with Annexin V FITC/PI staining and transmission electron microscopy. In addition, it was also found that the addition of LY294002 or Rapamycin inhibited the PI3K/Akt or mTOR kinase signal, decreasing the apoptosis and autophagy activities of bovine mammary epithelial cells induced by SIRT5-inhibited NH3. In summary, the PI3K/Akt/mTOR signal involved in NH3-induced cell autophagy and apoptosis relies on the regulation of SIRT5. This study provides a new theory for the use of NH3 to regulate bovine mammary epithelial cell apoptosis and autophagy, and provides guidance for improving the health and production performance of dairy cows.
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Affiliation(s)
- Junhui He
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Luping Feng
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Hanlin Yang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Shikai Gao
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Jinru Dong
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Guangyang Lu
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Luya Liu
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Xinyi Zhang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Kai Zhong
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Shuang Guo
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Guangming Zha
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Liqiang Han
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
- Ministry of Education Key Laboratory for Animal Pathogens and Biosafety, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Heping Li
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
| | - Yueying Wang
- Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
- Ministry of Education Key Laboratory for Animal Pathogens and Biosafety, College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, Henan 450046, P.R. China
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Deng RM, Zhou J. Targeting NF-κB in Hepatic Ischemia-Reperfusion Alleviation: from Signaling Networks to Therapeutic Targeting. Mol Neurobiol 2024; 61:3409-3426. [PMID: 37991700 DOI: 10.1007/s12035-023-03787-w] [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: 09/15/2023] [Accepted: 11/09/2023] [Indexed: 11/23/2023]
Abstract
Hepatic ischemia-reperfusion injury (HIRI) is a major complication of liver trauma, resection, and transplantation that can lead to liver dysfunction and failure. Scholars have proposed a variety of liver protection methods aimed at reducing ischemia-reperfusion damage, but there is still a lack of effective treatment methods, which urgently needs to find new effective treatment methods for patients. Many studies have reported that signaling pathway plays a key role in HIRI pathological process and liver function recovery mechanism, among which nuclear transfer factor-κB (NF-κB) signaling pathway is one of the signal transduction closely related to disease. NF-κB pathway is closely related to HIRI pathologic process, and inhibition of this pathway can delay oxidative stress, inflammatory response, cell death, and mitochondrial dysfunction. In addition, NF-κB can also interact with PI3K/Akt, MAPK, and Nrf2 signaling pathways to participate in HIRI regulation. Based on the role of NF-κB pathway in HIRI, it may be a potential target pathway for HIRI. This review emphasizes the role of inhibiting the NF-κB signaling pathway in oxidative stress, inflammatory response, cell death, and mitochondrial dysfunction in HIRI, as well as the effects of related drugs or inhibitors targeting NF-κB on HIRI. The objective of this review is to elucidate the role and mechanism of NF-κB pathway in HIRI, emphasize the important role of NF-κB pathway in the prevention and treatment of HIRI, and provide a theoretical basis for the target NF-κB pathway as a therapy for HIRI.
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Affiliation(s)
- Rui-Ming Deng
- Department of Anesthesiology, Ganzhou People's Hospital, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China
- The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou Hospital-Nanfang Hospital, Southern Medical University), 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China
| | - Juan Zhou
- The Affiliated Ganzhou Hospital of Nanchang University (Ganzhou Hospital-Nanfang Hospital, Southern Medical University), 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China.
- Department of Thyroid and Breast Surgery, Ganzhou People's Hospital, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China.
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Hu Y, Tian X, Zhao Y, Wang Z, Lin M, Sun R, Wang Y, Wang Z, Li G, Zheng S, Yao J. Sirtuin 5 Alleviates Liver Ischemia/Reperfusion Injury by Regulating Mitochondrial Succinylation and Oxidative Stress. Antioxid Redox Signal 2024; 40:616-631. [PMID: 37515421 DOI: 10.1089/ars.2022.0137] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Aims: Mitochondrial dysfunction is the primary mechanism of liver ischemia/reperfusion (I/R) injury. The lysine desuccinylase sirtuin 5 (SIRT5) is a global regulator of the mitochondrial succinylome and has pivotal roles in mitochondrial metabolism and function; however, its hepatoprotective capacity in liver I/R remains unclear. In this study, we established liver I/R model in SIRT5-silenced and SIRT5-overexpressed mice to examine the role and precise mechanisms of SIRT5 in liver I/R injury. Results: Succinylation was strongly enriched in liver mitochondria during I/R, and inhibiting mitochondrial succinylation significantly attenuated liver I/R injury. Importantly, the levels of the desuccinylase SIRT5 were notably decreased in liver transplant patients, as well as in mice subjected to I/R and in AML12 cells exposed to hypoxia/reoxygenation. Furthermore, SIRT5 significantly ameliorated liver I/R-induced oxidative injury, apoptosis, and inflammation by regulating mitochondrial oxidative stress and function. Intriguingly, the hepatoprotective effect of SIRT5 was mediated by PRDX3. Mechanistically, SIRT5 specifically desuccinylated PRDX3 at the K84 site, which enabled PRDX3 to alleviate mitochondrial oxidative stress during liver I/R. Innovation: This study denoted the new effect and mechanism of SIRT5 in regulating mitochondrial oxidative stress through lysine desuccinylation, thus preventing liver I/R injury. Conclusions: Our findings demonstrate for the first time that SIRT5 is a key mediator of liver I/R that regulates mitochondrial oxidative stress through the desuccinylation of PRDX3, which provides a novel strategy to prevent liver I/R injury. Antioxid. Redox Signal. 40, 616-631.
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Affiliation(s)
- Yan Hu
- Department of Pharmacology, Dalian Medical University, Dalian, China
- Department of Pharmacy, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xinyao Tian
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yan Zhao
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Zhecheng Wang
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Musen Lin
- Department of Pharmacy, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Ruimin Sun
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Yue Wang
- Department of Pharmacology, Dalian Medical University, Dalian, China
| | - Zhanyu Wang
- Department of General Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Guiru Li
- Department of Pharmacy, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Shusen Zheng
- Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Departments of Hepatobiliary and Pancreatic Surgery and Liver Transplantation, Shulan (Hangzhou) Hospital, Hangzhou, China
| | - Jihong Yao
- Department of Pharmacology, Dalian Medical University, Dalian, China
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Lin SK, Wang HW, Shun CT, Yang CN, Hong CY, Lai EHH, Cheng SJ, Chen MH, Yang H, Lin HY, Wu FY, Kok SH. Sirtuin 6 ameliorates arthritis through modulating cyclic AMP-responsive element binding protein/CCN1/cyclooxygenase 2 pathway in osteoblasts. J Bone Miner Metab 2023; 41:772-784. [PMID: 37898986 DOI: 10.1007/s00774-023-01468-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 09/18/2023] [Indexed: 10/31/2023]
Abstract
INTRODUCTION CCN1 is an immediate-early gene product pivotal for arthritis progression. We have previously shown that sirtuin 6 (SIRT6) inhibited hypoxia-induced CCN1 expression in osteoblasts. Herein we examined the contribution of cyclic AMP-responsive element binding protein (CREB)/CRE to this suppressive action and the influence of CCN1 on cyclooxygenase (COX) 2 synthesis. MATERIALS AND METHODS MC3T3-E1 murine osteoblasts were cultured under normoxia (21% oxygen) or hypoxia (2% oxygen). Expressions of CCN1, phospho-CREB (Ser133), COX2 and relevant kinases were assessed by Western blot. SIRT6 was overexpressed in cultured osteoblasts and arthritic joints by a lentiviral-based technique. Activities of CCN1 gene promoter constructs were examined by luciferase reporter assay. Interaction between CREB and CCN1 promoter was assessed by chromatin immunoprecipitation (ChIP). Collagen-induced arthritis (CIA) was established in 20 rats to evaluate the effects of SIRT6 therapy on osteoblastic expressions of phospho-CREB, CCN1 and COX2. RESULTS SIRT6 suppressed hypoxia-enhanced CCN1 expression and CREB phosphorylation. Attenuation of calcium/calmodulin-dependent protein kinase II (CaMKII) may be responsible for SIRT6-induced CREB inhibition. CRE at - 286 bp upstream of the ATG start codon was essential for CCN1 expression under hypoxia and SIRT6 reduced hypoxia-stimulated CREB/CRE interaction. Forced expression of CREB rescued SIRT6-suppressed CCN1 synthesis. CCN1 induced COX2 expression in osteoblasts. In rat CIA, the therapeutic effect of SIRT6 was accompanied by decreases in osteoblastic expressions of phospho-CREB, CCN1 and COX2. CONCLUSION Our study indicated that the benefits of SIRT6 to inflammatory arthritis and bone resorption are at least partially derived from its modulation of CREB/CCN1/COX2 pathway in osteoblasts.
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Affiliation(s)
- Sze-Kwan Lin
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Han-Wei Wang
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chia-Tung Shun
- Department of Forensic Medicine and Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - Cheng-Ning Yang
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chi-Yuan Hong
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
- College of Bio-Resources and Agriculture, National Taiwan University, Taipei, Taiwan
| | - Eddie Hsiang-Hua Lai
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shih-Jung Cheng
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Mu-Hsiung Chen
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
| | - Hsiang Yang
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
| | - Hung-Ying Lin
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
| | - Fang-Yu Wu
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan
| | - Sang-Heng Kok
- Department of Dentistry, National Taiwan University Hospital, No. 1 Chang-Te Street, Taipei, Taiwan.
- Department of Dentistry, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan.
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7
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Ibrahim AA, Abdel Mageed SS, Safar MM, El-Yamany MF, Oraby MA. MitoQ alleviates hippocampal damage after cerebral ischemia: The potential role of SIRT6 in regulating mitochondrial dysfunction and neuroinflammation. Life Sci 2023; 328:121895. [PMID: 37385372 DOI: 10.1016/j.lfs.2023.121895] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/19/2023] [Accepted: 06/26/2023] [Indexed: 07/01/2023]
Abstract
AIMS Mitochondrial perturbations are the major culprit of the inflammatory response during the initial phase of cerebral ischemia. The present study explored the neuroprotective effect of the mitochondrial-targeted antioxidant, Mitoquinol (MitoQ), against hippocampal neuronal loss in an experimental model of brain ischemia/reperfusion (I/R) injury. MAIN METHODS Rats were subjected to common carotid artery occlusion for 45 min, followed by reperfusion for 24 h. MitoQ (2 mg/kg; i.p daily) was administered for 7 successive days prior to the induction of brain ischemia. KEY FINDINGS I/R rats exhibited hippocampal damage evidenced by aggravated mitochondrial oxidative stress, thereby enhancing mtROS and oxidized mtDNA, together with inhibiting mtGSH. Mitochondrial biogenesis and function were also affected, as reflected by the reduction of PGC-1α, TFAM, and NRF-1 levels, as well as loss of mitochondrial membrane potential (△Ψm (. These changes were associated with neuroinflammation, apoptosis, impairment of cognitive function as well as hippocampal neurodegenerative changes in histopathological examination. Notably, SIRT6 was suppressed. Pretreatment with MitoQ markedly potentiated SIRT6, modulated mitochondrial oxidative status and restored mitochondrial biogenesis and function. In addition, MitoQ alleviated the inflammatory mediators, TNF-α, IL-18, and IL-1β and dampened GFAB immunoexpression along with downregulation of cleaved caspase-3 expression. Reversal of hippocampal function by MitoQ was accompanied by improved cognitive function and hippocampal morphological aberrations. SIGNIFICANCE This study suggests that MitoQ preserved rats' hippocampi from I/R insults via maintenance of mitochondrial redox status, biogenesis, and activity along with mitigation of neuroinflammation and apoptosis, thereby regulating SIRT6.
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Affiliation(s)
- Ayman A Ibrahim
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Sherif S Abdel Mageed
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt.
| | - Marwa M Safar
- Department of Pharmacology and Biochemistry, Faculty of Pharmacy, The British University in Egypt, Cairo, Egypt; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Mohammed F El-Yamany
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Mamdouh A Oraby
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Badr University in Cairo, 11829 Cairo, Egypt.
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8
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Li K, Feng Z, Wang L, Ma X, Wang L, Liu K, Geng X, Peng C. Chlorogenic Acid Alleviates Hepatic Ischemia-Reperfusion Injury by Inhibiting Oxidative Stress, Inflammation, and Mitochondria-Mediated Apoptosis In Vivo and In Vitro. Inflammation 2023; 46:1061-1076. [PMID: 36856879 DOI: 10.1007/s10753-023-01792-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 11/30/2022] [Accepted: 02/06/2023] [Indexed: 03/02/2023]
Abstract
Hepatic ischemia-reperfusion injury (HIRI) is the main reason for organ failure following liver surgery; however, its underlying causes are complex, and include oxidative stress, sterile inflammatory, and mitochondrial damage. Unfortunately, treatments for HIRI are based on supportive therapy, and no specific drugs or methods are currently available. Chlorogenic acid (CGA) is a dietary polyphenol with a wide range of pharmacological effects and it has a protective effect on HIRI; however, its specific mechanism remains unclear. In this study, we investigated that CGA pretreatment exerts protective effects against HIRI and the potential underlying mechanisms. We found that CGA pretreatment reduced ALT, AST, MDA, TNF-α, and IL-1β levels following HIRI, improved SOD and GSH levels, and alleviated pathological liver tissue damage, with the highest CGA dose (100 mg/kg.d) exerted the strongest effect. In addition, we showed that CGA pretreatment significantly decreased the levels of reactive oxygen species following HIRI, inhibited HMGB1 release by decreasing IRF-1 expression, inhibited the expression of HMGB1, TLR-4, MyD88, P-IκB-α, NF-κB P65, and P-P65, and promoted IκB-α degradation. Thus, CGA appears to inhibit oxidative stress and inflammatory responses during HIRI. Furthermore, we found that CGA pretreatment reduced hepatocyte apoptosis following HIRI, alleviated mitochondrial damage, promoted BCL-2 expression, inhibited Bax upregulation, and inhibited cytochrome C release to prevent caspase activation, thereby reducing the expression of the caspase-independent pathway components, ENDOG and AIF. Together, our findings suggest that CGA can protect against HIRI by inhibiting oxidative stress, the HMGB1/TLR-4/NF-κB signaling pathway-mediated inflammatory responses, and mitochondria-mediated apoptosis. Thus, CGA appears to be a promising therapeutic approach for treating HIRI.
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Affiliation(s)
- Kai Li
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China.,Department of Hepatobiliary and Pancreatic Surgery, The People's Hospital of Jianyang City, Jianyang, China
| | - Zanjie Feng
- Department of Biochemistry and Molecular Biology, Zunyi Medical University, Zunyi, Guizhou, China
| | - Liusong Wang
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Xuan Ma
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Lei Wang
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Kangwei Liu
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Xin Geng
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Cijun Peng
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China.
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9
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Dong XC. Sirtuin 6-A Key Regulator of Hepatic Lipid Metabolism and Liver Health. Cells 2023; 12:cells12040663. [PMID: 36831330 PMCID: PMC9954390 DOI: 10.3390/cells12040663] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 02/14/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Sirtuin 6 (SIRT6) is an NAD-dependent deacetylase/deacylase/mono-ADP ribosyltransferase, a member of the sirtuin protein family. SIRT6 has been implicated in hepatic lipid homeostasis and liver health. Hepatic lipogenesis is driven by several master regulators including liver X receptor (LXR), carbohydrate response element binding protein (ChREBP), and sterol regulatory element binding protein 1 (SREBP1). Interestingly, these three transcription factors can be negatively regulated by SIRT6 through direct deacetylation. Fatty acid oxidation is regulated by peroxisome proliferator activated receptor alpha (PPARα) in the liver. SIRT6 can promote fatty acid oxidation by the activation of PPARα or the suppression of miR-122. SIRT6 can also directly modulate acyl-CoA synthetase long chain family member 5 (ACSL5) activity for fatty acid oxidation. SIRT6 also plays a critical role in the regulation of total cholesterol and low-density lipoprotein (LDL)-cholesterol through the regulation of SREBP2 and proprotein convertase subtilisin/kexin type 9 (PCSK9), respectively. Hepatic deficiency of Sirt6 in mice has been shown to cause hepatic steatosis, inflammation, and fibrosis, hallmarks of alcoholic and nonalcoholic steatohepatitis. SIRT6 can dampen hepatic inflammation through the modulation of macrophage polarization from M1 to M2 type. Hepatic stellate cells are a key cell type in hepatic fibrogenesis. SIRT6 plays a strong anti-fibrosis role by the suppression of multiple fibrogenic pathways including the transforming growth factor beta (TGFβ)-SMAD family proteins and Hippo pathways. The role of SIRT6 in liver cancer is quite complicated, as both tumor-suppressive and tumor-promoting activities have been documented in the literature. Overall, SIRT6 has multiple salutary effects on metabolic homeostasis and liver health, and it may serve as a therapeutic target for hepatic metabolic diseases. To date, numerous activators and inhibitors of SIRT6 have been developed for translational research.
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Affiliation(s)
- X. Charlie Dong
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA;
- Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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10
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Polydatin Attenuates Cisplatin-Induced Acute Kidney Injury via SIRT6-Mediated Autophagy Activation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:9035547. [PMID: 36160707 PMCID: PMC9507782 DOI: 10.1155/2022/9035547] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/17/2022] [Accepted: 08/26/2022] [Indexed: 11/18/2022]
Abstract
In the treatment of malignant tumors, the effectiveness of cisplatin (CP) is limited by its nephrotoxicity, leading to cisplatin-induced acute kidney injury (CP-AKI). Polydatin (PD) has been demonstrated to regulate autophagy in tumors, sepsis, and diabetes. We have recently confirmed that PD attenuated CP-AKI by inhibiting ferroptosis, but it is not clear whether PD can regulate autophagy to protect from CP-AKI. The purpose of this study was to investigate the effect of PD on autophagy in CP-treated HK-2 cells and CP-AKI mouse models, exploring the role of sirtuin 6 (SIRT6) upregulated by PD. In this study, the blocking of autophagy flux was observed in both CP-treated HK-2 cells in vitro and CP-AKI mouse models in vivo, whereas this blocking was reversed by PD, which was characterized by the increase of autophagy microtubule-associated protein light chain 3 II expression and autophagolysosome/autophagosome ratio and the decrease of p62 expression. Furthermore, PD also significantly increased the expression of SIRT6 in vivo and in vitro. The protective effect of PD manifested by the stimulating of autophagy flux, with the reducing of inflammatory response and oxidative stress, which included downregulation of tumor necrosis factor-α and interleukin-1β, decreased activity of myeloperoxidase and content of malondialdehyde, and increased activity of superoxide dismutase and level of glutathione, both in vivo and in vitro, was reversed by either inhibition of autophagy flux by chloroquine or downregulation of SIRT6 by OSS-128167. Taken together, the present findings provide the first evidence demonstrating that PD exhibited nephroprotective effects on CP-AKI by restoring SIRT6-mediated autophagy flux mechanisms.
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11
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Cao S, Chen S, Qiao X, Guo Y, Liu F, Ding Z, Jin B. Protocatechualdehyde Rescues Oxygen-Glucose Deprivation/Reoxygenation-Induced Endothelial Cells Injury by Inducing Autophagy and Inhibiting Apoptosis via Regulation of SIRT1. Front Pharmacol 2022; 13:846513. [PMID: 35431914 PMCID: PMC9008765 DOI: 10.3389/fphar.2022.846513] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 03/14/2022] [Indexed: 01/30/2023] Open
Abstract
Background: Oxidative stress-induced endothelial cell death, such as apoptosis and autophagy, plays a critical role in ischemia-reperfusion injury. Protocatechualdehyde (PCA) is a major bioactive component of the traditional Chinese medicine Salvia miltiorrhiza Bunge (Lamiaceae), and it has been proved to be effective in the prevention and treatment of ischemic cardiovascular and cerebrovascular diseases. However, its role in oxidative stress-induced endothelial cell death and its underlying mechanisms remains unclear. This study aims to investigate the effects and mechanisms of PCA on endothelial cell apoptosis and autophagy induced by oxygen-glucose deprivation/reoxygenation (OGD/R) injury. Methods: After OGD/R induction, human umbilical vein endothelial cells (HUVECs) were treated with different concentrations of PCA. Cell viability, apoptosis, and autophagy were detected by Cell Counting Kit-8 assay, flow cytometry, and monodansylcadaverine assay, respectively. Western blot was applied to explore the effects of PCA on the expression levels of relevant protein factors. Results: The results show that PCA significantly promoted cell survival rate and cell proliferation and enhanced the antioxidant activity in OGD/R-induced HUVECs. PCA inhibited HUVECs apoptosis, as evidenced by decreased expression of cleaved-caspase-3, Bcl2-associated X (BAX), and increased expression of Bcl-2. PCA induced autophagy by reducing the expression of P62 while increasing the expression of Beclin-1 and LC3 II/I. Meanwhile, PCA enhanced the expression of Sirtuin 1 (SIRT1) and suppressed the expression of P53. When SIRT1 was inhibited by selisistat or SIRT1 small-interfering RNA, the anti-apoptotic and pro-autophagy abilities of PCA were attenuated. Conclusion: These results demonstrated that PCA rescued HUVECs from OGD/R-induced injury by promoting autophagy and inhibiting apoptosis through SIRT1 and could be developed as a potential therapeutic agent against ischemic diseases.
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Affiliation(s)
- Shidong Cao
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Senmiao Chen
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xilin Qiao
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yan Guo
- School of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Fang Liu
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhishan Ding
- School of Medical Technology and Information Engineering, Zhejiang Chinese Medical University, Hangzhou, China
| | - Bo Jin
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
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12
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Li X, Liu L, Jiang W, Liu M, Wang Y, Ma H, Mu N, Wang H. SIRT6 Protects Against Myocardial Ischemia-Reperfusion Injury by Attenuating Aging-Related CHMP2B Accumulation. J Cardiovasc Transl Res 2022; 15:740-753. [PMID: 35235147 DOI: 10.1007/s12265-021-10184-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 11/03/2021] [Indexed: 12/15/2022]
Abstract
Impaired autophagic flux induces aging-related ischemia vulnerability, which is the hallmark pathology in cardiac aging. Our previous work has confirmed that the accumulation of charged multivesicular body protein 2B (CHMP2B), a subunit of the ESCRT-III complex, in the heart can impair autophagy flux. However, whether CHMP2B accumulation contributes to aging-related intolerance to ischemia/reperfusion (I/R) injury and the regulatory mechanism for CHMP2B in aged heart remain elusive. The cardiac CHMP2B level was significantly higher in aged human myocardium than that in young myocardium. Increased CHMP2B were shown to inhibit autophagic flux leading to the deterioration of MI/R injury in aged mice hearts. Interestingly, a negative correlation was observed between SIRT6 and CHMP2B expression in human heart samples. Specific activation of SIRT6 suppressed CHMP2B accumulation and ameliorated autophagy flux in aged hearts. Using myocardial-specific SIRT6 heterozygous knockout mice and recovery experiments confirmed that SIRT6 regulated myocardial CHMP2B levels. Finally, activation of SIRT6 decreased acetylation of FoxO1 to promote its transcriptional function on Atrogin-1, a muscle-specific ubiquitin ligase, which subsequently enhanced the degradation of CHMP2B by Atrogin-1. This is a novel mechanism for SIRT6 against aging-related myocardial ischemia vulnerability, particularly by preventing excessive accumulation of autophagy key factors.
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Affiliation(s)
- Xiaokang Li
- Department of Cardiology, Tangdu Hospital, Fourth Military Medical University, No. 1 Xinsi Rd, Xi'an, China
| | - Lin Liu
- Department of Dermatology, Tangdu Hospital, Fourth Military Medical University, No. 1 Xinsi Rd, Xi'an, 710032, China
| | - Wenhua Jiang
- Institute of Medical Research, Northwestern Polytechnical University, Xi'an, China
| | - Manling Liu
- Department of Physiology and Pathophysiology, School of Basic Medicine, Fourth Military Medical University, No. 169 Changle West Rd, Xi'an, China
| | - Yishi Wang
- Department of Physiology and Pathophysiology, School of Basic Medicine, Fourth Military Medical University, No. 169 Changle West Rd, Xi'an, China
| | - Heng Ma
- Department of Physiology and Pathophysiology, School of Basic Medicine, Fourth Military Medical University, No. 169 Changle West Rd, Xi'an, China.
| | - Nan Mu
- Department of Physiology and Pathophysiology, School of Basic Medicine, Fourth Military Medical University, No. 169 Changle West Rd, Xi'an, China.
| | - Haiyan Wang
- Department of Cardiology, Tangdu Hospital, Fourth Military Medical University, No. 1 Xinsi Rd, Xi'an, China.
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13
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Zhao W, Sui M, Chen R, Lu H, Zhu Y, Zhang L, Zeng L. SIRT3 protects kidneys from ischemia-reperfusion injury by modulating the DRP1 pathway to induce mitochondrial autophagy. Life Sci 2021; 286:120005. [PMID: 34606850 DOI: 10.1016/j.lfs.2021.120005] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/24/2021] [Accepted: 09/26/2021] [Indexed: 12/24/2022]
Abstract
Renal ischemia-reperfusion injury (IRI) is a leading cause of acute kidney injury (AKI) and may influence renal graft survival. In this study, we investigate the involvement of SIRT3 and DRP1 in mitochondrial autophagy and AKI in a mouse model of IRI. Autophagy was detected in the absence of SIRT3, and hypoxic reoxygenation (H/R) experiments using renal tubular epithelial cells NRK52E were performed in vitro to validate these results. We found that autophagosomes increased following IRI and that the expression of autophagy-related genes was up-regulated. The inhibition of autophagy with 3-methyladenine exacerbated IRI, whereas the DRP1 inhibitor Mdivi-1 reversed this inhibition. Mdivi-1 did not reverse the inhibition of autophagy in the absence of SIRT3. During IRI, Mdivi-1 reduced autophagy and DRP1 expression, whereas SIRT3 overexpression attenuated this condition. Rescue experiment showed that autophagy was increased when both SIRT3 or DRP1 were over- or under-expressed or just DRP1 was under-expressed but expression was reduced when just SIRT3 was under-expressed. However, the expression of DRP1-related molecules was reduced when SIRT3 was overexpressed and when DRP1 was under-expressed. Taken together, these findings indicate that SIRT3 protects against kidney damage from IRI by modulating the DRP1 pathway to induce mitochondrial autophagy.
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Affiliation(s)
- Wenyu Zhao
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Mingxing Sui
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Rui Chen
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Hanlan Lu
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Youhua Zhu
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China
| | - Lei Zhang
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China.
| | - Li Zeng
- Department of Organ Transplantation, Changhai Hospital, Second Military Medical University, Shanghai, PR China.
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14
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MicroRNA-338-3p as a novel therapeutic target for intervertebral disc degeneration. Exp Mol Med 2021; 53:1356-1365. [PMID: 34531509 PMCID: PMC8492655 DOI: 10.1038/s12276-021-00662-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 04/29/2021] [Accepted: 06/27/2021] [Indexed: 02/08/2023] Open
Abstract
Recent studies have demonstrated the pivotal role played by microRNAs (miRNAs) in the etiopathogenesis of intervertebral disc degeneration (IDD). The study of miRNA intervention in IDD models may promote the advancement of miRNA-based therapeutic strategies. The aim of the current study was to investigate whether intradiscal delivery of miRNA can attenuate IDD development. Our results showed that miR-338-3p expression was significantly increased in the nucleus pulposus (NP) of patients with IDD. Moreover, there was a statistically significant positive correlation between the expression level of miR-338-3p and the severity of IDD. Our functional studies showed that miR-338-3p significantly influenced the expression of extracellular matrix synthesis genes, as well as the proliferation and apoptosis of NP cells. Mechanistically, miR-338-3p aggravated IDD progression by directly targeting SIRT6, a negative regulator of the MAPK/ERK pathway. Intradiscal injection of antagomir-338-3p significantly decelerated IDD development in mouse models. Our study is the first to identify miR-338-3p as a mediator of IDD and thus may be a promising target for rescuing IDD.
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15
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Krishna SM, Li J, Wang Y, Moran CS, Trollope A, Huynh P, Jose R, Biros E, Ma J, Golledge J. Kallistatin limits abdominal aortic aneurysm by attenuating generation of reactive oxygen species and apoptosis. Sci Rep 2021; 11:17451. [PMID: 34465809 PMCID: PMC8408144 DOI: 10.1038/s41598-021-97042-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 08/20/2021] [Indexed: 11/09/2022] Open
Abstract
Inflammation, vascular smooth muscle cell apoptosis and oxidative stress are believed to play important roles in abdominal aortic aneurysm (AAA) pathogenesis. Human kallistatin (KAL; gene SERPINA4) is a serine proteinase inhibitor previously shown to inhibit inflammation, apoptosis and oxidative stress. The aim of this study was to investigate the role of KAL in AAA through studies in experimental mouse models and patients. Serum KAL concentration was negatively associated with the diagnosis and growth of human AAA. Transgenic overexpression of the human KAL gene (KS-Tg) or administration of recombinant human KAL (rhKAL) inhibited AAA in the calcium phosphate (CaPO4) and subcutaneous angiotensin II (AngII) infusion mouse models. Upregulation of KAL in both models resulted in reduction in the severity of aortic elastin degradation, reduced markers of oxidative stress and less vascular smooth muscle apoptosis within the aorta. Administration of rhKAL to vascular smooth muscle cells incubated in the presence of AngII or in human AAA thrombus-conditioned media reduced apoptosis and downregulated markers of oxidative stress. These effects of KAL were associated with upregulation of Sirtuin 1 activity within the aortas of both KS-Tg mice and rodents receiving rhKAL. These results suggest KAL-Sirtuin 1 signalling limits aortic wall remodelling and aneurysm development through reductions in oxidative stress and vascular smooth muscle cell apoptosis. Upregulating KAL may be a novel therapeutic strategy for AAA.
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Affiliation(s)
- Smriti Murali Krishna
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia
| | - Jiaze Li
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia
| | - Yutang Wang
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia.,School of Applied and Biomedical Sciences, Faculty of Science and Technology, Federation University Australia, Horsham, VIC, Australia
| | - Corey S Moran
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia
| | - Alexandra Trollope
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia.,Division of Anatomy, College of Medicine and Dentistry, James Cook University, Townsville, QLD, Australia
| | - Pacific Huynh
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia
| | - Roby Jose
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia
| | - Erik Biros
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia
| | - Jianxing Ma
- Department of Physiology, Health Sciences Centre, University of Oklahoma, Oklahoma City, OK, 73104, USA
| | - Jonathan Golledge
- The Vascular Biology Unit, Queensland Research Centre for Peripheral Vascular Disease, College of Medicine and Dentistry, James Cook University, Townsville, QLD, 4811, Australia. .,Department of Vascular and Endovascular Surgery, Townsville University Hospital, Townsville, QLD, Australia.
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16
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Transcranial direct-current stimulation protects against cerebral ischemia-reperfusion injury through regulating Cezanne-dependent signaling. Exp Neurol 2021; 345:113818. [PMID: 34324860 DOI: 10.1016/j.expneurol.2021.113818] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/03/2021] [Accepted: 07/22/2021] [Indexed: 02/08/2023]
Abstract
Transcranial direct-current stimulation (tDCS) is proved safe and shows therapeutic effect in cerebral ischemic stroke in clinical trials. But the underlying molecular mechanisms remain unclear. Here we show that tDCS treatment reduces the infarct volume after rat cerebral ischemia-reperfusion (I/R) injury and results in functional improvement of stroke animals. At the cellular and molecular level, tDCS suppresses I/R-induced upregulation of Cezanne in the ischemic neurons. Cezanne inhibition confers neuroprotection after rat I/R and oxygen glucose deprivation (OGD) in the cortical neuronal cultures. Inhibiting Cezanne increases the level of SIRT6 that is downregulated in the ischemic neurons. Suppressing SIRT6 blocks Cezanne inhibition-induced neuroprotective effect and overexpressing SIRT6 attenuates OGD-induced neuronal death. We further show that downregulating Cezanne reduces DNA double-strand break (DSB) through upregulation of SIRT6 in OGD-insulted neurons. Together, this study suggests that Cezanne-dependent SIRT6-DNA DSB signaling pathway may mediate the neuroprotective effect of tDCS in ischemic neurons.
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17
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Pan J, Chen S, Guo W, Cao S, Shi X, Zhang J, Zhang H, Zhang S. Alpinetin protects against hepatic ischemia/reperfusion injury in mice by inhibiting the NF-κB/MAPK signaling pathways. Int Immunopharmacol 2021; 95:107527. [PMID: 33743314 DOI: 10.1016/j.intimp.2021.107527] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/05/2021] [Accepted: 02/21/2021] [Indexed: 12/22/2022]
Abstract
Liver damage induced by ischemia/reperfusion (I/R) remains a primary issue in liver transplantation and resection. Alpinetin, a novel plant flavonoid derived from Alpinia katsumadai Hayata, is widely used to treat various inflammatory diseases. However, the effects of alpinetin on hepatic I/R injury remain unclear. The present study investigated the protective effects of alpinetin pretreatment on hepatic I/R injury in mice. C57BL/6 mice were subjected to 1 h of partial hepatic ischemia followed by 6 h of reperfusion. Alpinetin (50 mg/kg) was given by intraperitoneal injection 1 h before liver ischemia. The blood and liver tissues were collected to assess biochemical indicators, hepatocyte damage, and levels of proteins related to signaling pathways. Furthermore, a hepatocytes hypoxia/reoxygenation (H/R) model was established for in vitro experiments. In vivo, we observed that alpinetin significantly attenuated the increases in alanine aminotransferase, aspartate transaminase, proinflammatory cytokines, hepatocyte damage, and apoptosis caused by hepatic I/R. Moreover, the hepatic I/R-induced nuclear factor kappa-B (NF-κB)/mitogen-activated protein kinase (MAPK) pathways were suppressed by alpinetin. In vitro, we also observed that alpinetin inhibited the inflammatory response, apoptosis, and activation of the NF-κB/MAPK pathways in hepatocytes after H/R treatment. Our data indicate that alpinetin ameliorated the inflammatory response and apoptosis induced by hepatic I/R injury in mice. The protective effects of alpinetin on hepatic I/R injury may be due to its ability to inhibit the NF-κB/MAPK signaling pathways. These results suggest that alpinetin is a promising potential therapeutic reagent for hepatic I/R injury.
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Affiliation(s)
- Jie Pan
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China
| | - Sanyang Chen
- Department of Emergency Surgery, the First Affiliated Hospital of Zhengzhou University, China
| | - Wenzhi Guo
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China
| | - Shengli Cao
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China
| | - Xiaoyi Shi
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China
| | - Jiakai Zhang
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China
| | - Huapeng Zhang
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China
| | - Shuijun Zhang
- Department of Hepatobiliary and Pancreatic Surgery, the First Affiliated Hospital of Zhengzhou University, China; Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan Universities, China; ZhengZhou Key Laboratory of Hepatobiliary & Pancreatic Diseases and Organ Transplantation, China.
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18
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Gu W, Qian Q, Xu Y, Xu X, Zhang L, He S, Li D. SIRT5 regulates autophagy and apoptosis in gastric cancer cells. J Int Med Res 2021; 49:300060520986355. [PMID: 33530803 PMCID: PMC7871096 DOI: 10.1177/0300060520986355] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVE Accumulating evidence illustrates that sirtuins (SIRTs) regulate autophagy and apoptosis in cancer cells; however, the role of SIRT5 in gastric cancer (GC) cells remains unknown. In this study, we examined the role of SIRT5 in GC cells. METHODS We detected SIRT5 protein levels in freshly collected samples from patients with GC. Next, we studied the function of SIRT5 in autophagy. Furthermore, the signaling pathway through which SIRT5 enhanced autophagy in GC cells was detected. In addition, we established a GC cell apoptosis model to analyze the role of SIRT5 in apoptosis. RESULTS SIRT5 expression was downregulated in GC tissues. We discovered that SIRT5 promoted autophagy in GC cells. We demonstrated that SIRT5 enhanced autophagy in GC cells via the AMP-activated protein kinase-mammalian target of rapamycin signaling pathway. In addition, SIRT5 was degraded during apoptosis in GC cells. Meanwhile, we observed that calpains and caspase-related proteins were associated with SIRT5-related GC cell apoptosis. CONCLUSIONS SIRT5 is a crucial regulator of autophagy and apoptosis in GC cell lines that can maintain the balance of autophagy and apoptosis.
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Affiliation(s)
- Wen Gu
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou, China
| | - Qinyi Qian
- Department of Ultrasonography, Changshu No. 2 People's Hospital, Changshu, China
| | - Yinkai Xu
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiaolan Xu
- Department of Gastroenterology, Xiangcheng People's Hospital, Suzhou, China
| | - Liping Zhang
- Department of Gastroenterology, Suzhou Municipal Hospital Affiliated of Nanjing Medical University, Suzhou, China
| | - Songbing He
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou, China
| | - Dechun Li
- Department of General Surgery, the First Affiliated Hospital of Soochow University, Suzhou, China
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19
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Liberale L, Gaul DS, Akhmedov A, Bonetti NR, Nageswaran V, Costantino S, Pahla J, Weber J, Fehr V, Vdovenko D, Semerano A, Giacalone G, Kullak-Ublick GA, Sessa M, Eriksson U, Paneni F, Ruschitzka F, Montecucco F, Beer JH, Lüscher TF, Matter CM, Camici GG. Endothelial SIRT6 blunts stroke size and neurological deficit by preserving blood-brain barrier integrity: a translational study. Eur Heart J 2021; 41:1575-1587. [PMID: 31603194 DOI: 10.1093/eurheartj/ehz712] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 07/01/2019] [Accepted: 10/01/2019] [Indexed: 12/11/2022] Open
Abstract
AIMS Aging is an established risk factor for stroke; genes regulating longevity are implicated in the pathogenesis of ischaemic stroke where to date, therapeutic options remain limited. The blood-brain barrier (BBB) is crucially involved in ischaemia/reperfusion (I/R) brain injury thus representing an attractive target for developing novel therapeutic agents. Given the role of endothelial cells in the BBB, we hypothesized that the endothelial-specific expression of the recently described longevity gene SIRT6 may exhibit protective properties in stroke. METHODS AND RESULTS SIRT6 endothelial expression was reduced following stroke. Endothelial-specific Sirt6 knockout (eSirt6-/-) mice, as well as animals in which Sirt6 overexpression was post-ischaemically induced, underwent transient middle cerebral artery occlusion (tMCAO). eSirt6-/- animals displayed increased infarct volumes, mortality, and neurological deficit after tMCAO, as compared to control littermates. Conversely, post-ischaemic Sirt6 overexpression decreased infarct size and neurological deficit. Analysis of ischaemic brain sections revealed increased BBB damage and endothelial expression of cleaved caspase-3 in eSIRT6-/- mice as compared to controls. In primary human brain microvascular endothelial cells (HBMVECs), hypoxia/reoxygenation (H/R) reduced SIRT6 expression and SIRT6 silencing impaired the barrier function (transendothelial resistance) similar to what was observed in mice exposed to I/R. Further, SIRT6-silenced HBMVECs exposed to H/R showed reduced viability, increased cleaved caspase-3 expression and reduced activation of the survival pathway Akt. In ischaemic stroke patients, SIRT6 expression was higher in those with short-term neurological improvement as assessed by NIHSS scale and correlated with stroke outcome. CONCLUSION Endothelial SIRT6 exerts a protective role in ischaemic stroke by blunting I/R-mediated BBB damage and thus, it may represent an interesting novel therapeutic target to be explored in future clinical investigation.
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Affiliation(s)
- Luca Liberale
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, 6 viale Benedetto XV, Genoa 16132, Italy
| | - Daniel S Gaul
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland
| | - Alexander Akhmedov
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland
| | - Nicole R Bonetti
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,Department of Internal Medicine, Cantonal Hospital of Baden, Im Ergel 1, Baden 5404, Switzerland
| | - Vanasa Nageswaran
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, Berlin 12203, Germany
| | - Sarah Costantino
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland
| | - Jürgen Pahla
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland
| | - Julien Weber
- Institute of Molecular Life Sciences, University of Zurich, Winterthurerstrasse 190, Zurich 8057, Switzerland
| | - Vera Fehr
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland
| | - Daria Vdovenko
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland
| | - Aurora Semerano
- Department of Neurology, San Raffaele Scientific Institute, via Olgettina 60, Milano 20132, Italy
| | - Giacomo Giacalone
- Department of Neurology, San Raffaele Scientific Institute, via Olgettina 60, Milano 20132, Italy
| | - Gerd A Kullak-Ublick
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, Zurich, Switzerland
| | - Maria Sessa
- Department of Neurology, San Raffaele Scientific Institute, via Olgettina 60, Milano 20132, Italy
| | - Urs Eriksson
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,GZO Spital Wetzikon, Spitalstrasse 66, Wetzikon 8620, Switzerland
| | - Francesco Paneni
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Rämistrasse 100, Zurich 8092, Switzerland.,Department of Research and Education, University Hospital Zurich, Rämistrasse 100, Zurich 8092, Switzerland
| | - Frank Ruschitzka
- Department of Cardiology, University Heart Center, University Hospital Zurich, Rämistrasse 100, Zurich 8092, Switzerland
| | - Fabrizio Montecucco
- IRCCS Ospedale Policlinico San Martino Genoa - Italian Cardiovascular Network, L.go R. Benzi 10, Genoa 16132, Italy.,First Clinic of Internal Medicine, Department of Internal Medicine, Centre of Excellence for Biomedical Research (CEBR), University of Genoa, 6 viale Benedetto XV, Genoa 16132, Italy
| | - Jürg H Beer
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,Department of Internal Medicine, Cantonal Hospital of Baden, Im Ergel 1, Baden 5404, Switzerland
| | - Thomas F Lüscher
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,Royal Brompton and Harefield Hospitals, Imperial College, Dovehouse Street, London SW3 6LY, UK
| | - Christian M Matter
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Rämistrasse 100, Zurich 8092, Switzerland
| | - Giovanni G Camici
- Center for Molecular Cardiology, Schlieren Campus, University of Zurich, Wagistrasse 12, Schlieren 8952, Switzerland.,Department of Cardiology, University Heart Center, University Hospital Zurich, Rämistrasse 100, Zurich 8092, Switzerland.,Department of Research and Education, University Hospital Zurich, Rämistrasse 100, Zurich 8092, Switzerland.,Zurich Neuroscience Center, University of Zurich, Winterthurerstrasse 190, Zurich 8057, Switzerland
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20
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The Protective Effect of Traditional Chinese Medicine on Liver Ischemia-Reperfusion Injury. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:5564401. [PMID: 33927775 PMCID: PMC8049787 DOI: 10.1155/2021/5564401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/05/2021] [Accepted: 03/29/2021] [Indexed: 02/05/2023]
Abstract
Liver ischemia-reperfusion (I/R) injury occurs during transplantation and major hepatic surgery, which may lead to postoperative liver dysfunction. More and more traditional Chinese medicines (TCMs) have been used to treat liver ischemia-reperfusion injury. The purpose of this review is to evaluate the different protective effects of TCMs in the treatment of liver ischemia-reperfusion injury and to summarize its possible mechanisms. The results indicate that TCMs attenuate liver I/R injury via multiple mechanisms, including antioxidation stress, anti-inflammatory response, antiapoptosis, and inhibiting endoplasmic reticulum stress. However, the in-depth mechanism of the protective effects of these traditional Chinese medicines still remains unknown.
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21
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Shao Q, Xia J, Wu P, Ying J. Dexmedetomidine protects cardiac microvascular endothelial cells from the damage of ogd/r through regulation of the pparδ-mediated autophagy. Microcirculation 2021; 28:e12675. [PMID: 33377581 DOI: 10.1111/micc.12675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 12/23/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND Dexmedetomidine (Dex) exerts an effective therapeutic role in numerous diseases associated with ischemia/reperfusion (I/R) injury via its anti-apoptosis properties. Therefore, this study explores the cardioprotective effects of Dex in cardiac microvascular endothelial cells (CMECs) in response to oxygen-glucose deprivation and re-oxygenation (OGD/R) injury and its potential mechanism. MATERIAL AND METHODS CMECs were pretreatment with different concentration of Dex, then exposed to OGD/R. Cell viability was measured with CCK-8 assay. Apoptosis was evaluated by flow cytometry, and apoptosis-related protein was determined by Western blot. Autophagy was assessed by transmission electron microscopy and autophagy-related proteins. Besides, the role peroxisome proliferator-activated receptors (PPARδ) in Dex-mediated anti-apoptosis property was validated with agonist and antagonist. RESULTS OGD/R significantly decreased cell viability, increased reactive oxygen species, caused disorder of autophagy, and increased apoptosis in CMECs. Dex enhanced the viability of the OGD/R-treated CMECs and effectively decreased reactive oxygen species production. Autophagy in CMECs was activated by Dex, as evidenced by the increase in the ratio of LC3B-II/I, expression level of Beclin1 and number of autophagosomes in the OGD/R-induced CMECs. The mechanistic investigation indicated that PPARδ antagonist GW501516 aggravated cell damage following OGD/R, while PPARδ agonist GW6471 partly abolished the Dex-mediated protective effects. CONCLUSIONS Dex activated the PPARδ-AMPK-PGC-1α pathway-mediated autophagy in CMECs, therefore to inhibit excessive apoptosis induced by OGD/R. Dex may potentially be a therapeutic intervention for myocardial I/R injury.
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Affiliation(s)
- Qingbo Shao
- Department of Anesthesiology, Minhang Branch, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jing Xia
- Shanghai International Travel Healthcare Center, Shanghai, China
| | - Pinwen Wu
- Department of Anesthesiology, Minhang Branch, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jiazhou Ying
- Department of Anesthesiology, Minhang Branch, Zhongshan Hospital, Fudan University, Shanghai, China
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22
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Zhang Z, Song Y, Wang SI, Ha SH, Jang KY, Park BH, Moon YJ, Kim JR. Osteoblasts/Osteocytes sirtuin6 Is Vital to Preventing Ischemic Osteonecrosis Through Targeting VDR-RANKL Signaling. J Bone Miner Res 2021; 36:579-590. [PMID: 33147653 DOI: 10.1002/jbmr.4207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 10/20/2020] [Accepted: 11/01/2020] [Indexed: 12/15/2022]
Abstract
Ischemic osteonecrosis (ION) can produce permanent deformity and osteoarthritis in the femoral head and other joints. No biologic treatment has been established, and the molecular mechanisms involved in the pathogenesis of ION have not been elucidated. In this work, we found that treatment with sirtuin6 (Sirt6) suppressed inflammatory cytokines, bone resorption, progression of osteoarthritis, and reduced bone deformity in an ION mouse model. We used a deacetylase mutant adenovirus to confirm that those effects were caused by the deacetylase function of Sirt6. Among the osteoclastogenic factors of osteoblasts, only the receptor activator of NF-κb ligand (RANKL) level changed in response to Sirt6 knockout in primary osteoblasts. In particular, the vitamin D receptor physically interacted with Sirt6 and induced recruitment of Sirt6 around RANKL promoters. Finally, Tg mice overexpressing Sirt6 resisted osteocyte death, bone resorption, and progression of osteoarthritis after ischemic surgery, whereas osteoblast/osteocyte-specific Sirt6 knockout mice showed aggravated bone loss and severe deformity. Our findings demonstrate that administration of Sirt6 prevents bone loss and osteoarthritis in ischemic conditions. Activation of Sirt6 in osteoblasts/osteocytes could be a new therapeutic approach to treating ION of the femoral head and other bone regions. © 2020 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Zhongkai Zhang
- Department of Orthopaedic Surgery, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Yiping Song
- Department of Orthopaedic Surgery, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Sung Il Wang
- Department of Orthopaedic Surgery, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Sang Hoon Ha
- Division of Biotechnology, Chonbuk National University, Iksan, Republic of Korea
| | - Kyu Yun Jang
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Jeonju, Republic of Korea.,Department of Pathology, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Byung-Hyun Park
- Department of Biochemistry and Molecular Biology, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - Young Jae Moon
- Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Jeonju, Republic of Korea.,Department of Biochemistry and Molecular Biology, Chonbuk National University Medical School, Jeonju, Republic of Korea.,Department of Orthopaedic Surgery, Chonbuk National University Hospital, Jeonju, Republic of Korea
| | - Jung Ryul Kim
- Department of Orthopaedic Surgery, Chonbuk National University Medical School, Jeonju, Republic of Korea.,Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Jeonju, Republic of Korea
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23
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Chen SY, Zhang HP, Li J, Shi JH, Tang HW, Zhang Y, Zhang JK, Wen PH, Wang ZH, Shi XY, He YT, Hu BW, Yang H, Guo WZ, Zhang SJ. Tripartite Motif-Containing 27 Attenuates Liver Ischemia/Reperfusion Injury by Suppressing Transforming Growth Factor β-Activated Kinase 1 (TAK1) by TAK1 Binding Protein 2/3 Degradation. Hepatology 2021; 73:738-758. [PMID: 32343849 PMCID: PMC7898667 DOI: 10.1002/hep.31295] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/31/2020] [Accepted: 04/07/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND AIMS Hepatic ischemia-reperfusion (I/R) injury, which mainly involves inflammatory responses and apoptosis, is a common cause of organ dysfunction in liver transplantation (LT). As a critical mediator of inflammation and apoptosis in various cell types, the role of tripartite motif-containing (TRIM) 27 in hepatic I/R injury remains worthy of study. APPROACH AND RESULTS This study systemically evaluated the putative role of TRIM27/transforming growth factor β-activated kinase 1 (TAK1)/JNK (c-Jun N-terminal kinase)/p38 signaling in hepatic I/R injury. TRIM27 expression was significantly down-regulated in liver tissue from LT patients, mice subjected to hepatic I/R surgery, and hepatocytes challenged by hypoxia/reoxygenation (H/R) treatment. Subsequently, using global Trim27 knockout mice (Trim27-KO mice) and hepatocyte-specific Trim27 transgenic mice (Trim27-HTG mice), TRIM27 functions to ameliorate liver damage, reduce the inflammatory response, and prevent cell apoptosis. In parallel in vitro studies, activating TRIM27 also prevented H/R-induced hepatocyte inflammation and apoptosis. Mechanistically, TRIM27 constitutively interacted with the critical components, TAK1 and TAK1 binding protein 2/3 (TAB2/3), and promoted the degradation of TAB2/3, leading to inactivation of TAK1 and the subsequent suppression of downstream JNK/p38 signaling. CONCLUSIONS TRIM27 is a key regulator of hepatic I/R injury by mediating the degradation of TAB2/3 and suppression of downstream TAK1-JNK/p38 signaling. TRIM27 may be a promising approach to protect the liver against I/R-mediated hepatocellular damage in transplant recipients.
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Affiliation(s)
- San-Yang Chen
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Hua-Peng Zhang
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Jie Li
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Ji-Hua Shi
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Hong-Wei Tang
- Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Yi Zhang
- Department of SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina
| | - Jia-Kai Zhang
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Pei-Hao Wen
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Zhi-Hui Wang
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Xiao-Yi Shi
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Yu-Ting He
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Bo-Wen Hu
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Han Yang
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Wen-Zhi Guo
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
| | - Shui-Jun Zhang
- Department of Hepatobiliary and Pancreatic SurgeryThe First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina.,Henan Key Laboratory of Digestive Organ TransplantationZhengzhouChina.,Open and Key Laboratory of Hepatobiliary & Pancreatic Surgery and Digestive Organ Transplantation at Henan UniversitiesZhengzhouChina
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24
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Gong C, Zhou X, Lai S, Wang L, Liu J. Long Noncoding RNA/Circular RNA-miRNA-mRNA Axes in Ischemia-Reperfusion Injury. BIOMED RESEARCH INTERNATIONAL 2020; 2020:8838524. [PMID: 33299883 PMCID: PMC7710414 DOI: 10.1155/2020/8838524] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/30/2020] [Accepted: 10/30/2020] [Indexed: 12/18/2022]
Abstract
Ischemia-reperfusion injury (IRI) elicits tissue injury involved in a wide range of pathologies. Multiple studies have demonstrated that noncoding RNAs (ncRNAs), including long noncoding RNAs (lncRNAs), circular RNAs (circRNAs), and microRNAs (miRNAs), participate in the pathological development of IRI, and they may act as biomarkers, therapeutic targets, or prognostic indicators. Nonetheless, the specific molecular mechanisms of ncRNAs in IRI have not been completely elucidated. Regulatory networks among lncRNAs/circRNAs, miRNAs, and mRNAs have been the focus of attention in recent years. Studies on the underlying molecular mechanisms have contributed to the discovery of therapeutic targets or strategies in IRI. In this review, we comprehensively summarize the current research on the lncRNA/circRNA-miRNA-mRNA axes and highlight the important role of these axes in IRI.
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Affiliation(s)
- Chengwu Gong
- Department of Cardiothoracic Surgery, Second Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, China
| | - Xueliang Zhou
- Department of Cardiothoracic Surgery, First Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, China
| | - Songqing Lai
- Department of Cardiothoracic Surgery, First Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, China
| | - Lijun Wang
- Department of Cardiothoracic Surgery, Second Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, China
| | - Jichun Liu
- Department of Cardiothoracic Surgery, Second Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, China
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25
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Wang Z, Zhang P, Wang Q, Sheng X, Zhang J, Lu X, Fan X. Protective effects of Ginkgo Biloba Dropping Pills against liver ischemia/reperfusion injury in mice. Chin Med 2020; 15:122. [PMID: 33292377 PMCID: PMC7678318 DOI: 10.1186/s13020-020-00404-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 11/11/2020] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Liver ischemia/reperfusion (I/R) injury is an inevitable pathological phenomenon in various clinical conditions, such as liver transplantation, resection surgery, or shock, which is the major cause of morbidity and mortality after operation. Ginkgo Biloba Dropping Pill (GBDP) is a unique Chinese Ginkgo Biloba leaf extract preparation that exhibits a variety of beneficial biological activities. The aim of this study is to investigate the protective effects of GBDP on the liver I/R injury both in the in vitro and in vivo. METHODS Hypoxia/reoxygenation (H/R) experiments were performed in alpha mouse liver 12 (AML-12) cells and primary hepatocytes, which were pretreated with GBDP (60 or 120 µg/mL) followed by incubation in a hypoxia chamber. Cell viability was detected by 3-(4,5-dimethylthiazol-2-yl)-2.5-diphenyltetrazolium bromide (MTT) assay. Annexin V staining as well as western blot analysis of apoptosis-related proteins was performed to detect the protective effect of GBDP on cell apoptosis induced by H/R injury. C57BL/6 mice were used to establish the liver I/R injury model, and were pretreated with GBDP (100 or 200 mg/kg/day, i.g.) for two weeks. The liver damage was evaluated by detection of plasma levels of alanine transaminase (ALT) and aspartate transaminase (AST), as well as histopathological examinations. Liver inflammation was determined by detecting the secretion of pro-inflammatory cytokines and neutrophil infiltration through enzyme-linked immunosorbent assay (ELISA) and myeloperoxidase (MPO) immunohistochemistry staining. Finally, Terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick and labeling (TUNEL) staining and western blot analysis of apoptosis-related proteins were used to investigate the anti-apoptotic effect of GBDP in mice. RESULTS In the in vitro study, GBDP pretreatment improved the cell viability of AML-12 cells in the H/R injury model. Similarly, the same result was found in the primary hepatocytes isolated from C57BL/6 mice. Moreover, GBDP decreased the number of apoptotic cells and reduced the expression of apoptosis-related proteins induced by H/R injury. In the in vivo study, oral administration of GBDP ameliorated liver injury evidenced by a significant decline in the levels of ALT and AST. Furthermore, the result of hematoxylin and eosin (H&E) staining showed that GBDP reduced the size of necrosis area in the liver tissue. In addition, the decreased infiltration of neutrophils and secretion of pro-inflammatory cytokines indicated that GBDP may play an anti-inflammatory effect. More importantly, GBDP reduced TUNEL-positive cells and the expression of apoptosis-related proteins in the liver indicating GBDP has anti-apoptotic effects. CONCLUSIONS Our findings elucidated that GBDP has potential effects for protecting against liver I/R injury characterized by its anti-apoptotic, anti-necrotic, and anti-inflammatory properties, which would promisingly make contributions to the exploration of therapeutic strategies in the liver I/R injury.
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Affiliation(s)
- Zheng Wang
- Pharmaceutical informatics institute, College of Pharmaceutical Science, Zhejiang University, 310058, Hangzhou, China
| | - Ping Zhang
- Pharmaceutical informatics institute, College of Pharmaceutical Science, Zhejiang University, 310058, Hangzhou, China
| | - Qingqing Wang
- Zhejiang University - Wanbangde pharmaceutical Group Joint Research Center for Chinese Medicine Modernization, Zhejiang, Hangzhou, China
| | - Xueping Sheng
- Zhejiang University - Wanbangde pharmaceutical Group Joint Research Center for Chinese Medicine Modernization, Zhejiang, Hangzhou, China
| | - Jianbing Zhang
- Zhejiang University - Wanbangde pharmaceutical Group Joint Research Center for Chinese Medicine Modernization, Zhejiang, Hangzhou, China
| | - Xiaoyan Lu
- Pharmaceutical informatics institute, College of Pharmaceutical Science, Zhejiang University, 310058, Hangzhou, China.
| | - Xiaohui Fan
- Pharmaceutical informatics institute, College of Pharmaceutical Science, Zhejiang University, 310058, Hangzhou, China. .,State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 301617, Tianjin, China.
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26
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Li Y, Luo Y, Li B, Niu L, Liu J, Duan X. miRNA-182/Deptor/mTOR axis regulates autophagy to reduce intestinal ischaemia/reperfusion injury. J Cell Mol Med 2020; 24:7873-7883. [PMID: 32510855 PMCID: PMC7348187 DOI: 10.1111/jcmm.15420] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 05/01/2020] [Accepted: 05/06/2020] [Indexed: 02/06/2023] Open
Abstract
It had been reported miR‐182 was down‐regulated after intestinal ischaemia/reperfusion (I/R) damage. However, its role and potential mechanisms are still unknown. This study was aimed to elucidate the function of miR‐182 in intestinal I/R injury and the underlying mechanisms. The model of intestinal injury was constructed in wild‐type and Deptor knockout (KO) mice. Haematoxylin‐eosin staining, Chiu's score and diamine oxidase were utilized to detect intestinal damage. RT‐qPCR assay was used to detected miR‐182 expression. Electronic microscopy was used to detect autophagosome. Western blot was applied to detect the expression of Deptor, S6/pS6, LC3‐II/LC3‐I and p62. Dual‐luciferase reporter assay was used to verify the relationship between miR‐182 and Deptor. The results showed miR‐182 was down‐regulated following intestinal I/R. Up‐regulation of miR‐182 reduced intestinal damage, autophagy, Deptor expression and enhanced mTOR activity following intestinal I/R. Moreover, suppression of autophagy reduced intestinal damage and inhibition of mTOR by rapamycin aggravated intestinal damage following intestinal I/R. Besides, damage of intestine was reduced and mTOR activity was enhanced in Deptor KO mice. In addition, Deptor was the target gene of miR‐182 and was indispensable for the protection of miR‐182 on intestine under I/R condition. Together, our research implicated up‐regulation of miR‐182 inhibited autophagy to alleviate intestinal I/R injury via mTOR by targeting Deptor.
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Affiliation(s)
- Yunsheng Li
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yanhua Luo
- Department of Anesthesiology, Zhongshan Ophthalmic Center of Sun Yat-sen University, Guangzhou, China
| | - Baochuan Li
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Lijun Niu
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jiaxin Liu
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoyun Duan
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Wu S, Yao W, Chen C, Chen H, Huang F, Liu Y, Cai J, Yuan D, Hei Z. Connexin 32 deficiency protects the liver against ischemia/reperfusion injury. Eur J Pharmacol 2020; 876:173056. [PMID: 32147436 DOI: 10.1016/j.ejphar.2020.173056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 02/28/2020] [Accepted: 02/28/2020] [Indexed: 12/11/2022]
Abstract
Hepatic ischemia/reperfusion (I/R) injury is a common complication in the clinical setting. Our previous study has shown that connexin 32 (Cx32) plays a major role in renal I/R injury; however, the role of Cx32 in hepatic I/R injury remains unknown. Liver tissue and serum samples from patients undergoing orthotopic liver transplantation (OLT) were used to evaluate the function of Cx32 in OLT post-reperfusion injury. Then, partial hepatic ischemia was established in global Cx32 knockout mice and wild-type mice followed by reperfusion. Hepatic injury markers were examined. Cx32 small interfering RNA and the p53 inhibitor, pifithrin-α, tenovin-1 were used to examine the relationship between Cx32 and the p53/puma pathways in the BRL-3A and murine primary hepatocytes hypoxia/reoxygenation (H/R) model. Corresponding to liver damage, Cx32 was significantly induced both during OLT in human patients and partial hepatic I/R in mice. Cx32 KO mice exhibited less liver injury than controls. Cx32 deficiency significantly suppressed the p53/puma pathways and hepatocyte apoptosis. Similar results were observed in the BRL-3A and murine primary hepatocytes H/R model. Propofol protected against OLT post-reperfusion injury and hepatocyte apoptosis by inhibiting Cx32. In conclusion Cx32 is a novel regulator of hepatic I/R injury through the modulation of hepatocyte apoptosis and damage, largely via the p53/puma signaling pathway.
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Affiliation(s)
- Shan Wu
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Weifeng Yao
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Chaojin Chen
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Huixin Chen
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Fei Huang
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Yiqian Liu
- Southern Medical University, Guangzhou, 510515, China
| | - Jun Cai
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China.
| | - Dongdong Yuan
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China.
| | - Ziqing Hei
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China.
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Sirt6 opposes glycochenodeoxycholate-induced apoptosis of biliary epithelial cells through the AMPK/PGC-1α pathway. Cell Biosci 2020; 10:43. [PMID: 32206298 PMCID: PMC7083051 DOI: 10.1186/s13578-020-00402-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/06/2020] [Indexed: 12/12/2022] Open
Abstract
Background Induction of biliary epithelial cell apoptosis by toxic bile acids is involved in the development of cholestatic disease, but the underlying molecular mechanism is not clear. The purpose of this study was to investigate the molecular mechanisms involved in Sirt6 protection against the apoptosis of human intrahepatic biliary epithelial cells (HiBEC) induced by the bile acid glycochenodeoxycholate (GCDC). Results Sirt6 was either overexpressed or knocked down in HiBEC, with or without GCDC pretreatment. The CCK-8 assay was used to assess cell viability and, Hoechst 33258 staining was used to determine apoptotic rate. Mitochondrial DNA (mtDNA) copy number, malondialdehyde (MDA) and reactive oxygen species (ROS) production were detected to evaluate the severity of the mitochondrial dysfunction and oxidative stress. The mRNA and protein levels of PGC-1α, Nrf1, and Nrf2 were analyzed using RT-qPCR and western blot assay. The results showed that Sirt6 opposed GCDC-induced apoptosis in HiBEC via up-regulating PGC-1α expression and stabilizing mtDNA. We used agonists and inhibitors of AMPK to demonstrate that Sirt6 increased PGC-1α expression through the AMPK pathway whereas GCDC had the opposite effect. Finally, western blot, luciferase assay, and co-immunoprecipitation were used to describe a direct interaction and acetylation modification of PGC-1α by Sirt6. Conclusion Our data illuminated that Sirt6 ameliorated GCDC-induced HiBEC apoptosis by upregulating PGC-1α expression through the AMPK pathway and its deacetylation effect.
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Gao L, Qian B, Chen H, Wang A, Li Q, Li J, Tan P, Xia X, Du Y, Fu W. Hic-5 deficiency attenuates hepatic ischemia reperfusion injury through TLR4/NF-κB signaling pathways. Life Sci 2020; 249:117517. [PMID: 32147431 DOI: 10.1016/j.lfs.2020.117517] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 03/04/2020] [Accepted: 03/04/2020] [Indexed: 01/29/2023]
Abstract
AIM To explore the role and mechanism of Hydrogen peroxide-inducible clone-5 (Hic-5) in hepatic ischemia reperfusion injury. METHODS Hic-5 KO and WT mice were used to establish the liver ischemia reperfusion model (HI/R). Primary hepatocytes were isolated to establish hypoxic reoxygenation model (H/R). AST and ALT were measured by automatic biochemical analyzer. Liver tissue sections were stained with HE and Tunnel. RNA and proteins were extracted from liver tissues, and expressions of Il-6, Il-10, CCL-2, CXCL-10, P65, Caspase-3, TLR4 and FADD were detected at gene and protein levels. Liver cell apoptosis was detected by flow cytometry and immunofluorescence. Primary hepatocytes were stimulated by LPS to establish a model of hepatocyte apoptosis, and cell inflammation and apoptosis-related proteins were detected. RESULTS After HI/R, ALT and AST in serum were up-regulated, some hepatocyte apoptosis were observed in pathological sections. Hic-5 expression was increased in WT mice after HI/R, and liver damage were severer than KO mice. The expression of IL-6, CCL-2 and CXCL-10 in the liver of KO mice was low, and the expression of IL-10 was high. Further studies showed that KO mice showed lower expression of P65, Caspase3 and TLR4. In H/R model, hepatocytes also showed the same trend. Finally, after LPS stimulation, the results showed that the inflammation and apoptosis induced by LPS were significantly reduced in Hic-5 knocked hepatocytes. CONCLUSION Hic-5 was found to promote inflammation through NF-kb signaling pathway and apoptosis through TLR4-FADD signaling pathway in mice with HI/R, thus aggravating liver injury in mice.
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Affiliation(s)
- Lin Gao
- Department of Health Management, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Baolin Qian
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Hao Chen
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Ankang Wang
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Qiu Li
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Jing Li
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Peng Tan
- Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Xianming Xia
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China
| | - Yichao Du
- Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China.
| | - Wenguang Fu
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Sichuan, China; Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China.
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Xue X, Wang H, Su J. Inhibition of MiR-122 Decreases Cerebral Ischemia-reperfusion Injury by Upregulating DJ-1-Phosphatase and Tensin Homologue Deleted on Chromosome 10 (PTEN)/Phosphonosinol-3 Kinase (PI3K)/AKT. Med Sci Monit 2020; 26:e915825. [PMID: 32061171 PMCID: PMC7043345 DOI: 10.12659/msm.915825] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Ischemia-reperfusion injury is caused by a blood reperfusion injury in ischemic brain tissue, and usually occurs in the treatment stage of ischemic disease, which can aggravate brain tissue injury. MiR-122 is closely related to ischemia-reperfusion injury in the myocardium, kidney, and liver; however, the role in cerebral ischemia-reperfusion injury has not been established. MATERIAL AND METHODS In this study, cerebral ischemia-reperfusion injury was established in a rat model, and the control group was a sham-operated group. After ischemia-reperfusion injury for 6, 12, and 24 hours, brain tissue specimens were collected and the expression of miR-122 and DJ-1 were determined using quantitative real-time polymerase chain reaction. Flow cytometry was used to determine the reactive oxygen species (ROS) content. The modified Neurological Severity Score (mNSS) scale was used to evaluate the sensory and motor function defects of the rats. The malondialdehyde (MDA), superoxide dismutase (SOD), and enzyme activity were determined. The rats in the cerebral ischemia-reperfusion injury model were divided into 2 groups (antagomir-NC group and antagomir miR-122 group). Brain neuron RN-c cells were divided into the following 4 groups: antagomir-NC, antagomir miR-122, pIRES2-blank, and pIRES2-DJ-1. Seventy-two hours after transfection, ischemia-reperfusion treatment was carried out and conventional cultured RN-c cells were used as the control group. Flow cytometry was used to detect apoptosis and western blot was used to detect the expression of DJ-1, PTEN, AKT, and p-AKT. RESULTS The expression of miR-122 increased significantly in the process of ischemia-reperfusion damage after cerebral infarction, while the expression of DJ-1 decreased significantly. Downregulation of miR-122 significantly increased the expression of DJ-1, enhanced the activity of the PTEN/PI3K/AKT pathway, reduced cell apoptosis, and alleviated cerebral ischemia-reperfusion injury. CONCLUSIONS Inhibition of miR-122 can decrease cerebral ischemia-reperfusion injury by upregulating DJ-1-PTEN/PI3K/AKT pathway.
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Affiliation(s)
- XinHong Xue
- Department of Neurology, Liaocheng People's Hospital, Liaocheng, Shandong, China (mainland)
| | - HongRu Wang
- Department of Neurology, Liaocheng People's Hospital, Liaocheng, Shandong, China (mainland)
| | - JiangLi Su
- Department of Neurology, Liaocheng People's Hospital, Liaocheng City, China (mainland)
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Xue W, Wang X, Tang H, Sun F, Zhu H, Huang D, Dong L. Vitexin attenuates myocardial ischemia/reperfusion injury in rats by regulating mitochondrial dysfunction induced by mitochondrial dynamics imbalance. Biomed Pharmacother 2020; 124:109849. [PMID: 31972356 DOI: 10.1016/j.biopha.2020.109849] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/16/2019] [Accepted: 12/26/2019] [Indexed: 10/25/2022] Open
Abstract
Vitexin (VT) is a main bioactive flavonoid compound derived from the dried leaf of hawthorn (Crataegus pinnatifida), a widely used Chinese traditional folk medicine. Recent studies have shown that vitexin presents cardioprotective effects in vivo and in vitro. Mitochondrial dysfunction is a salient feature of myocardial ischemia/reperfusion (I/R) injury (MIRI), but the potential mechanism is still unclear. This study investigated the cardioprotective effect of vitexin against MIRI and its possible mechanism. Isolated SD rat hearts were subjected to MIRI in a Langendorff perfusion system, and H9c2 cells were subjected to hypoxia/reoxygenation (H/R) in vitro. Ex vivo experiments showed improved left ventricular function and reduced infarct size in the vitexin group. Transmission electron microscopy showed that I/R caused outer mitochondrial membrane rupture, cristae disappearance and vacuolation, while vitexin reduced mitochondrial damage and ultimately reduced cardiomyocyte apoptosis. In vitro, vitexin protected H9c2 cells from H/R-induced mitochondrial dysfunction, significantly reducing ROS levels; improving mitochondrial activity, mitochondrial membrane potential and ATP content; markedly increasing MFN2 expression and reducing the recruitment of Drp1 in mitochondria. These results suggest a new protective mechanism of vitexin for ischemic heart disease treatment.
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Affiliation(s)
- Wei Xue
- Department of Pharmacology, Key Laboratory of Anti-Inflammatory and Immunopharmacology of Ministry of Education, Key Laboratory of Chinese Medicine Research and Development of State Administration of Traditional Chinese Medicine, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Xin Wang
- Department of Pharmacology, Key Laboratory of Anti-Inflammatory and Immunopharmacology of Ministry of Education, Key Laboratory of Chinese Medicine Research and Development of State Administration of Traditional Chinese Medicine, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Hong Tang
- Department of Pharmacology, Key Laboratory of Anti-Inflammatory and Immunopharmacology of Ministry of Education, Key Laboratory of Chinese Medicine Research and Development of State Administration of Traditional Chinese Medicine, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Fanfan Sun
- Department of Pharmacology, Key Laboratory of Anti-Inflammatory and Immunopharmacology of Ministry of Education, Key Laboratory of Chinese Medicine Research and Development of State Administration of Traditional Chinese Medicine, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Huaqing Zhu
- Laboratory of Molecular Biology and Department of Biochemistry, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Dake Huang
- Synthetic Laboratory of School of Basic Medicine Sciences, Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Liuyi Dong
- Department of Pharmacology, Key Laboratory of Anti-Inflammatory and Immunopharmacology of Ministry of Education, Key Laboratory of Chinese Medicine Research and Development of State Administration of Traditional Chinese Medicine, Anhui Medical University, Hefei, Anhui, People's Republic of China.
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Wang H, Liu Y, Wang D, Xu Y, Dong R, Yang Y, Lv Q, Chen X, Zhang Z. The Upstream Pathway of mTOR-Mediated Autophagy in Liver Diseases. Cells 2019; 8:E1597. [PMID: 31835352 PMCID: PMC6953127 DOI: 10.3390/cells8121597] [Citation(s) in RCA: 161] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 12/11/2022] Open
Abstract
Autophagy, originally found in liver experiments, is a cellular process that degrades damaged organelle or protein aggregation. This process frees cells from various stress states is a cell survival mechanism under stress stimulation. It is now known that dysregulation of autophagy can cause many liver diseases. Therefore, how to properly regulate autophagy is the key to the treatment of liver injury. mechanistic target of rapamycin (mTOR)is the core hub regulating autophagy, which is subject to different upstream signaling pathways to regulate autophagy. This review summarizes three upstream pathways of mTOR: the phosphoinositide 3-kinase (PI3K)/protein kinase (AKT) signaling pathway, the adenosine monophosphate-activated protein kinase (AMPK) signaling pathway, and the rat sarcoma (Ras)/rapidly accelerated fibrosarcoma (Raf)/mitogen-extracellular activated protein kinase kinase (MEK)/ extracellular-signal-regulated kinase (ERK) signaling pathway, specifically explored their role in liver fibrosis, hepatitis B, non-alcoholic fatty liver, liver cancer, hepatic ischemia reperfusion and other liver diseases through the regulation of mTOR-mediated autophagy. Moreover, we also analyzed the crosstalk between these three pathways, aiming to find new targets for the treatment of human liver disease based on autophagy.
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Affiliation(s)
- Haojie Wang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Yumei Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Dongmei Wang
- College of Medical, Henan University of Science and Technology, Luoyang 471000, China;
| | - Yaolu Xu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Ruiqi Dong
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Yuxiang Yang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Qiongxia Lv
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Xiaoguang Chen
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
| | - Ziqiang Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471000, China; (H.W.); (Y.X.); (R.D.); (Y.Y.); (Q.L.); (X.C.)
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Ren Q, Hu Z, Jiang Y, Tan X, Botchway BOA, Amin N, Lin G, Geng Y, Fang M. SIRT1 Protects Against Apoptosis by Promoting Autophagy in the Oxygen Glucose Deprivation/Reperfusion-Induced Injury. Front Neurol 2019; 10:1289. [PMID: 31920915 PMCID: PMC6915092 DOI: 10.3389/fneur.2019.01289] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 11/21/2019] [Indexed: 12/13/2022] Open
Abstract
Silent information regulator 1 (SIRT1) contributes to cellular regulation. Previous studies have reported SIRT1 to be abnormally expressed in the ischemic penumbra of cerebral ischemia/reperfusion (I/R) injury rat model. We investigated the effect of SIRT1 on oxygen and glucose deprivation/reperfusion (OGD/R) cell injury. Over-expressed or silenced SIRT1 pheochromocytoma 12 (PC12) cells were exposed to an in-vitro OGD/R injury. Western blot, TUNEL staining and immunofluorescence analyses were performed to assess apoptosis and autophagy. We found autophagy and apoptosis to be up-regulated and down-regulated, respectively, following the over-expression of SIRT1 in the OGD/R-induced PC12 cells. We also found the silencing of SIRT1 to culminate in the down-regulation and up-regulation of autophagy and apoptosis, respectively. On the basis of our results, we surmise that SIRT1 can promote autophagy and inhibit apoptosis in-vitro, and thus exhibit potential neuroprotection against OGD/R-induced injury. This could facilitate in the development of therapeutic approaches for cerebral I/R injury.
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Affiliation(s)
- Qiannan Ren
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhiying Hu
- Department of Obstetrics and Gynecology, Hangzhou Red Cross Hospital, Hangzhou, China
| | - Yuting Jiang
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaoning Tan
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
| | - Benson O A Botchway
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
| | - Nashwa Amin
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
| | - Gaoping Lin
- Department of Neurology, Zhejiang Provincial People's Hospital, Hangzhou, China.,People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Yu Geng
- Department of Neurology, Zhejiang Provincial People's Hospital, Hangzhou, China.,People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Marong Fang
- Institute of Neuroscience, Zhejiang University School of Medicine, Hangzhou, China
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Li Q, Fang W, Hu F, Zhou X, Cheng Y, Jiang C. A high-salt diet aggravates retinal ischaemia/reperfusion injury. Exp Eye Res 2019; 188:107784. [PMID: 31476280 DOI: 10.1016/j.exer.2019.107784] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 07/15/2019] [Accepted: 08/30/2019] [Indexed: 10/26/2022]
Abstract
Ischaemia/reperfusion contributes to the pathophysiological process of many retinal diseases. Previous studies have shown that retinal ischaemia/reperfusion mainly results in neuronal degeneration, including thinning of the retina, retinal ganglion cell death and reductions in electroretinography. A high-salt diet contributes to the inflammatory response and tissue hypoperfusion and may be associated with ischaemia/reperfusion injury. In the present study, we investigated the influence of a high-salt diet on retinal ischaemia/reperfusion injury and explored the potential mechanism in a rat model. The results revealed that the high-salt diet aggravated ischaemia/reperfusion-induced thinning of the retina. A TUNEL assay and Brn-3a staining revealed substantially more severe cell death and loss of retinal ganglion cells, and electroretinography confirmed worse retinal function in the ischaemia/reperfusion eyes of rats fed the high-salt diet. These effects may be associated with upregulation of Caspase-3, Bax, Interleukin-1β and Interleukin-6 and decreased expression of nitric oxide. In summary, a high-salt diet aggravates ischaemia/reperfusion-induced retinal neuronal impairment by activating pro-apoptotic and pro-inflammatory signalling pathways and inhibiting vasodilation.
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Affiliation(s)
- Qingchen Li
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, Shanghai, China; Key Laboratory of Myopia of State Health Ministry, Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Wangyi Fang
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, Shanghai, China; Key Laboratory of Myopia of State Health Ministry, Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China
| | - Fangyuan Hu
- Eye Institute, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Xujiao Zhou
- Eye Institute, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Yun Cheng
- Eye Institute, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Chunhui Jiang
- Department of Ophthalmology, Eye and ENT Hospital, Fudan University, Shanghai, China; Key Laboratory of Myopia of State Health Ministry, Key Laboratory of Visual Impairment and Restoration of Shanghai, Shanghai, China.
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Yang Y, Tian T, Wang Y, Li Z, Xing K, Tian G. SIRT6 protects vascular endothelial cells from angiotensin II-induced apoptosis and oxidative stress by promoting the activation of Nrf2/ARE signaling. Eur J Pharmacol 2019; 859:172516. [DOI: 10.1016/j.ejphar.2019.172516] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/23/2019] [Accepted: 06/28/2019] [Indexed: 10/26/2022]
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Huang X, Gao Y, Qin J, Lu S. miR-214 Down-Regulation Promoted Hypoxia/Reoxygenation-Induced Hepatocyte Apoptosis Through TRAF1/ASK1/JNK Pathway. Dig Dis Sci 2019; 64:1217-1225. [PMID: 30560327 DOI: 10.1007/s10620-018-5405-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 11/27/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This study investigated the role of miR-214 in the hepatocyte apoptosis induced by hypoxia/reoxygenation (H/R) injury. MATERIALS AND METHODS In vivo hepatic ischemia/reperfusion (HIR) injury, mice model and in vitro HR model were established. miR-214, TRAF1, ASK1, and JNK expression levels were detected by qRT-PCR and western blot. The apoptosis of mouse hepatocyte AML12 was detected by flow cytometry analysis. The interaction between miR-214 and TRAF1 was confirmed by dual-luciferase reporter gene assay. RESULTS Serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels were elevated in HIR injury mice compared with sham mice. miR-214 expression was down-regulated in liver tissues of HIR and H/R-induced hepatocytes, whereas TRAF1, ASK1, and JNK expressions were up-regulated in HIR and H/R groups. H/R stimulation promoted the apoptosis of hepatocytes, and miR-214 overexpression inhibited the apoptosis of hepatocytes. Besides, TRAF1 was a target of miR-214 and negatively regulated by miR-214. miR-214/TRAF1 pathway involved in the modulation of H/R-induced apoptosis of hepatocytes. In vivo study proved miR-214 reduced hepatic injury of HIR mice. CONCLUSION miR-214 overexpression reduces hepatocyte apoptosis after HIR injury through negatively regulating TRAF1/ASK1/JNK pathway.
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Affiliation(s)
- Xinli Huang
- Center of Liver Transplantation, The First Affiliated Hospital of Nanjing Medical University, The Key Laboratory of Living Donor Liver Transplantation, National Health and Family Planning Commission, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Yun Gao
- Center of Liver Transplantation, The First Affiliated Hospital of Nanjing Medical University, The Key Laboratory of Living Donor Liver Transplantation, National Health and Family Planning Commission, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Jianjie Qin
- Center of Liver Transplantation, The First Affiliated Hospital of Nanjing Medical University, The Key Laboratory of Living Donor Liver Transplantation, National Health and Family Planning Commission, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Sen Lu
- Center of Liver Transplantation, The First Affiliated Hospital of Nanjing Medical University, The Key Laboratory of Living Donor Liver Transplantation, National Health and Family Planning Commission, 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China.
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Jiménez-Castro MB, Cornide-Petronio ME, Gracia-Sancho J, Casillas-Ramírez A, Peralta C. Mitogen Activated Protein Kinases in Steatotic and Non-Steatotic Livers Submitted to Ischemia-Reperfusion. Int J Mol Sci 2019; 20:ijms20071785. [PMID: 30974915 PMCID: PMC6479363 DOI: 10.3390/ijms20071785] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/03/2019] [Accepted: 04/09/2019] [Indexed: 12/12/2022] Open
Abstract
We analyzed the participation of mitogen-activated protein kinases (MAPKs), namely p38, JNK and ERK 1/2 in steatotic and non-steatotic livers undergoing ischemia-reperfusion (I-R), an unresolved problem in clinical practice. Hepatic steatosis is a major risk factor in liver surgery because these types of liver tolerate poorly to I-R injury. Also, a further increase in the prevalence of steatosis in liver surgery is to be expected. The possible therapies based on MAPK regulation aimed at reducing hepatic I-R injury will be discussed. Moreover, we reviewed the relevance of MAPK in ischemic preconditioning (PC) and evaluated whether MAPK regulators could mimic its benefits. Clinical studies indicated that this surgical strategy could be appropriate for liver surgery in both steatotic and non-steatotic livers undergoing I-R. The data presented herein suggest that further investigations are required to elucidate more extensively the mechanisms by which these kinases work in hepatic I-R. Also, further researchers based in the development of drugs that regulate MAPKs selectively are required before such approaches can be translated into clinical liver surgery.
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Affiliation(s)
| | | | - Jordi Gracia-Sancho
- Liver Vascular Biology Research Group, Barcelona Hepatic Hemodynamic Laboratory IDIBAPS, 08036 Barcelona, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), 08036 Barcelona, Spain.
| | - Araní Casillas-Ramírez
- Hospital Regional de Alta Especialidad de Ciudad Vitoria, Ciudad Victoria 87087, Mexico.
- Facultad de Medicina e ingeniería en Sistemas Computacionales de Matamoros, Universidad Autónoma de Tamaulipas, Matamoros 87300, México.
| | - Carmen Peralta
- Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona 08036, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), 08036 Barcelona, Spain.
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Kong D, Hua X, Qin T, Zhang J, He K, Xia Q. Inhibition of glycogen synthase kinase 3β protects liver against ischemia/reperfusion injury by activating 5' adenosine monophosphate-activated protein kinase-mediated autophagy. Hepatol Res 2019; 49:462-472. [PMID: 30565807 DOI: 10.1111/hepr.13287] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 11/13/2018] [Accepted: 11/16/2018] [Indexed: 12/30/2022]
Abstract
AIM Autophagy has been found to play an important role in hepatic ischemia/reperfusion (I/R) injury. Our previous study has also clarified that rictor deficiency aggravated hepatic I/R injury by suppressing autophagy. Here, we explore whether autophagy participates in glycogen synthase kinase 3β (GSK3β)-mediated cytoprotection in liver I/R. METHODS Mice were treated with SB216763 to inhibit GSK3β before being subjected to hepatic I/R. Liver injury was evaluated by liver and blood samples. Autophagy was measured by detecting expression of microtubule-associated protein 1 light chain-3B (LC3B) II and autophagy protein 5 (ATG-5), as well as the number of autophagosomes by transmission electron microscope. Primary hepatocytes pretreated with SB216763 for 2 h were subjected to hypoxia/reoxygenation to induce autophagy. The lactate dehydrogenase level was used to evaluate cell death and survival. Autophagy inhibitors and 5' adenosine monophosphate-activated protein kinase (AMPK) inhibitor were given in vivo or in vitro. RESULTS SB216763 significantly increased the number of autophagosomes and the protein levels of LC3B II and ATG-5 in liver I/R models, which was accompanied by a decline of hepatic necrosis and apoptosis. Consistent with the in vivo study, autophagy and cytoprotection were induced by the inhibition of GSK3β in the in vitro study. Moreover, pretreatment with autophagy inhibitors attenuated the cytoprotective role of autophagy in the GSK3β-treated liver I/R models. Further analysis showed that pretreatment with an AMPK inhibitor increased mammalian target of rapamycin (mTOR) activity, decreased autophagy, and abrogated GSK3β- mediated liver protection. CONCLUSION Autophagy was induced by GSK3β inhibition through the AMPK/mTOR pathway and could substantially ameliorate liver I/R injury. Therefore, our findings strongly renew the therapeutic value of the GSK3β/autophagy axis in hepatic I/R injury.
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Affiliation(s)
- Defu Kong
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiangwei Hua
- Center of Organ Transplantation, The Affiliated Hospital of Qingdao University and Institute of Transplant Medicine, Qingdao University, Qingdao, China
| | - Tian Qin
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jianjun Zhang
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Kang He
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiang Xia
- Department of Liver Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Lin J, Huang H, Yang S, Duan J, Xu W, Zeng Z. Protective Effects of Ischemic Preconditioning Protocols on Ischemia-Reperfusion Injury in Rat Liver. J INVEST SURG 2019; 33:876-883. [PMID: 30821527 DOI: 10.1080/08941939.2018.1556753] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jie Lin
- Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Hanfei Huang
- Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Shikun Yang
- Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jian Duan
- Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Wanggang Xu
- Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Zhong Zeng
- Organ Transplantation Center, The First Affiliated Hospital of Kunming Medical University, Kunming, China
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Yu J, Sun W, Song Y, Liu J, Xue F, Gong K, Yang X, Kang Q. SIRT6 protects retinal ganglion cells against hydrogen peroxide-induced apoptosis and oxidative stress by promoting Nrf2/ARE signaling via inhibition of Bach1. Chem Biol Interact 2019; 300:151-158. [DOI: 10.1016/j.cbi.2019.01.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/12/2019] [Accepted: 01/16/2019] [Indexed: 01/19/2023]
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41
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Tang B, Bao N, He G, Wang J. Long noncoding RNA HOTAIR regulates autophagy via the miR-20b-5p/ATG7 axis in hepatic ischemia/reperfusion injury. Gene 2019; 686:56-62. [DOI: 10.1016/j.gene.2018.10.059] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 10/19/2018] [Accepted: 10/20/2018] [Indexed: 02/08/2023]
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42
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Bae JS, Noh SJ, Kim KM, Park SH, Hussein UK, Park HS, Park BH, Ha SH, Lee H, Chung MJ, Moon WS, Cho DH, Jang KY. SIRT6 Is Involved in the Progression of Ovarian Carcinomas via β-Catenin-Mediated Epithelial to Mesenchymal Transition. Front Oncol 2018; 8:538. [PMID: 30524965 PMCID: PMC6256124 DOI: 10.3389/fonc.2018.00538] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 11/01/2018] [Indexed: 12/12/2022] Open
Abstract
SIRT6 is involved in various cellular signaling pathways including those involved in tumorigenesis in association with β-catenin. However, the role of SIRT6 in tumorigenesis has been controversially reported and the studies on the role of SIRT6 in ovarian cancers is limited. In this study, we evaluated the expression and roles of SIRT6 in conjunction with the expression of active β-catenin in 104 human ovarian carcinomas and ovarian cancer cells. In human ovarian carcinomas, the expressions of SIRT6 and active β-catenin were associated with higher tumor stage, higher histologic grade, and platinum-resistance. Moreover, nuclear expression of SIRT6 (104 ovarian carcinomas; P = 0.010, 63 high-grade serous carcinomas; P = 0.040), and activated β-catenin (104 ovarian carcinomas; P = 0.013, 63 high-grade serous carcinomas; P = 0.005) were independent indicators of shorter overall survival of ovarian carcinoma patients in multivariate analysis. In OVCAR3 and OVCAR5 ovarian cancer cells, knock-down of SIRT6 significantly inhibited the migration and invasion of cells, but did not inhibit the proliferation of cells. SIRT6-mediated invasiveness of ovarian cancer cells was associated with the expression of epithelial-to-mesenchymal transition-related signaling molecules such as snail, vimentin, N-cadherin, E-cadherin, and activated β-catenin. Especially, SIRT6-mediated increase of invasiveness and activation of epithelial-to-mesenchymal transition signaling was attenuated by knock-down of β-catenin. In conclusion, this study suggests that SIRT6-β-catenin signaling is involved in the epithelial-to-mesenchymal transition of ovarian cancer cells, and the expression of SIRT6 and active β-catenin might be used as indicators of poor prognosis of ovarian carcinoma patients. In addition, our results suggest that SIRT6-β-catenin signaling might be a new therapeutic target of ovarian carcinomas.
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Affiliation(s)
- Jun Sang Bae
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea
| | - Sang Jae Noh
- Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea.,Department of Forensic Medicine, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea
| | - Kyoung Min Kim
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea
| | - See-Hyoung Park
- Department of Bio and Chemical Engineering, Hongik University, Sejong, South Korea
| | - Usama Khamis Hussein
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Faculty of Science, Beni-Suef University, Beni Suef, Egypt
| | - Ho Sung Park
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea
| | - Byung-Hyun Park
- Department of Biochemistry, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea
| | - Sang Hoon Ha
- Division of Biotechnology, Chonbuk National University, Iksan, South Korea
| | - Ho Lee
- Department of Forensic Medicine, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea
| | - Myoung Ja Chung
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea
| | - Woo Sung Moon
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea
| | - Dong Hyu Cho
- Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea.,Department of Obstetrics and Gynecology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea
| | - Kyu Yun Jang
- Department of Pathology, Chonbuk National University Medical School, Chonbuk National University, Jeonju, South Korea.,Biomedical Research Institute, Chonbuk National University Hospital, Jeonju, South Korea.,Research Institute for Clinical Medicine, Chonbuk National University, Jeonju, South Korea.,Research Institute for Endocrine Sciences, Chonbuk National University, Jeonju, South Korea
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Zhang Y, Miao LS, Cai YM, He JX, Zhang ZN, Wu G, Zheng J. TXNIP knockdown alleviates hepatocyte ischemia reperfusion injury through preventing p38/JNK pathway activation. Biochem Biophys Res Commun 2018; 502:409-414. [PMID: 29852169 DOI: 10.1016/j.bbrc.2018.05.185] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 05/28/2018] [Indexed: 10/14/2022]
Abstract
Hepatic ischemia and reperfusion (I/R) injury is a major cause of liver damage during liver transplantation, resection surgery, shock, and trauma. It has been reported that TXNIP expression was upregulated in a rat model of hepatic I/R injury. However, the role of TXNIP in the hepatic I/R injury is little known. In our study, we investigated the biological role of TXNIP and its potential molecular mechanism in the human hepatic cell line (HL7702 cells). Using oxygen-glucose deprivation and reoxygenation (OGD/R) to create a cell model of hepatic I/R injury, we found that the mRNA and protein expression levels of TXNIP were upregulated in HL7702 cells exposed to OGD/R. TXNIP overexpression remarkably promoted OGD/R-induced cell apoptosis and lactate dehydrogenase (LDH) release, both of which were significantly decreased by TXNIP knockdown. The production of malondialdehyde (MDA) was also increased by TXNIP overexpression, but was reduced by TXNIP knockdown. Moreover, TXNIP overexpression significantly upregulated the phosphorylation of p38 and JNK, which was remarkably inhibited by TXNIP knockdown. Additionally, p38-specific inhibitor SB203580 abrogated the effect of TXNIP overexpression on OGD/R-induced cell injury. Taken together, these results indicated that TXNIP knockdown alleviated hepatocyte I/R injury through preventing p38/JNK pathway activation. Thus, TXNIP might offer a novel potential therapeutic target for the treatment of hepatic I/R injury.
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Affiliation(s)
- Yong Zhang
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Liang-Sheng Miao
- Department of Anesthesiology, Weinan Central Hospital, Weinan, Shaanxi Province, China
| | - Ying-Min Cai
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Jia-Xuan He
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Zhen-Ni Zhang
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Gang Wu
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China.
| | - Juan Zheng
- Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
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Ouyang L, Yi L, Li J, Yi S, Li S, Liu P, Yang X. SIRT6 overexpression induces apoptosis of nasopharyngeal carcinoma by inhibiting NF-κB signaling. Onco Targets Ther 2018; 11:7613-7624. [PMID: 30464510 PMCID: PMC6219112 DOI: 10.2147/ott.s179866] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Previous reports show that SIRT6 serves as a critical modulator of the development of multiple malignancies as well as other disorders. However, its role in nasopharyngeal carcinoma (NPC) is unknown. Thus, we elucidated the effects of SIRT6 on the survival of NPC cells, and modulation of cell death. METHODS We found that expression of SIRT6 is downregulated in ten human NPC specimens as well as in the human NPC cell lines, 5-8 F and CNE1, as compared with that in healthy tissues and normal nasopharyngeal NP69 cells. The MTT assay and colony formation assay revealed that upregulation of SIRT6 impaired the proliferation, as well as the survival of 5-8 F and CNE1 cells. The TUNEL assay, annexin V-FITC/propidium iodide, and flow cytometry were performed to detect apoptosis. The results revealed that the expression of SIRT6 resulted in increased apoptosis. RESULTS Western blotting results showed that SIRT6 overexpression decreased anti-apoptotic Bcl-2 levels, whereas it promoted an increase in pro-apoptotic Bax and cleaved caspase-3 levels. Moreover, NF-κB levels were markedly reduced in cells expressing SIRT6, whereas they were increased in cells transfected with shRNA-SIRT6. Recovery of NF-κB expression was found to counter the suppressive influence of SIRT6 on NPC cell survival, whereas, NF-κB knockdown increased apoptosis of NPC cells. CONCLUSION Thus, the findings of our study offer insight into the biological and molecular mechanisms underlying the development of NPC and may lead to the development of new and innovative strategies for the treatment of NPC.
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Affiliation(s)
- Lei Ouyang
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Liang Yi
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Jingkun Li
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Shijiang Yi
- Department of Otolaryngology, Head and Neck Surgery, the Affiliated Hospital of Guilin Medical College, the Institute of Otolaryngology of Guilin Medical College, Guilin, 541001 Guangxi, People's Republic of China,
| | - Shisheng Li
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
| | - Peng Liu
- Department of Otolaryngology, Head and Neck Surgery, the Affiliated Hospital of Guilin Medical College, the Institute of Otolaryngology of Guilin Medical College, Guilin, 541001 Guangxi, People's Republic of China,
| | - Xinming Yang
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, People's Republic of China,
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Zhang Y, Lei X, Li W, Ding X, Bai J, Wang J, Wu G. TNIP1 alleviates hepatic ischemia/reperfusion injury via the TLR2-Myd88 pathway. Biochem Biophys Res Commun 2018; 501:186-192. [DOI: 10.1016/j.bbrc.2018.04.209] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 04/26/2018] [Indexed: 02/07/2023]
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Abstract
Hepatic ischemia-reperfusion injury is a common complication of liver surgery and an important cause of liver dysfunction after operation. The pathogenesis of liver ischemia-reperfusion injury is very complex, involving many factors. Autophagy is a lysosomal degradation pathway on which eukaryotic cells rely to maintain the cell homeostasis. Autophagy plays an important role in the process of liver ischemia-reperfusion injury. However, the specific role and mechanism of autophagy in liver ischemia-reperfusion injury are still controversial. In this paper, we reivew the role and mechanism of autophagy in hepatic ischemia-reperfusion injury.
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Affiliation(s)
- Zi-Yi Li
- Department of General Surgery, People's Hospital of Daqing, Daqing 163316, Heilongjiang Province, China
| | - Li-Quan Tong
- Department of General Surgery, People's Hospital of Daqing, Daqing 163316, Heilongjiang Province, China
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Wang Z, Li C, Jiang M, Chen J, Yang M, Pu J. Filamin A (FLNA) regulates autophagy of bladder carcinoma cell and affects its proliferation, invasion and metastasis. Int Urol Nephrol 2017; 50:263-273. [PMID: 29288417 DOI: 10.1007/s11255-017-1772-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/12/2017] [Indexed: 12/17/2022]
Abstract
PURPOSE This research intended to explore the effect of FLNA on cell proliferation, invasion and migration in bladder carcinoma (BC). METHODS Microarray analysis was performed with the TCGA data, and the results were confirmed on 20 paired BC tissues and adjacent tissues using qRT-PCR and immunohistochemistry. Transmission electron microscope (TEM) and cell fluorescence assay were used to observe the quantity of autophagosomes. The expression of autophagy-related protein (LC3-I/II, p62) was detected by western blot. Cell proliferation was detected using CCK-8 and colony formation. The invasion and migration ability of the cell were tested by transwell and wound-healing assay. Tumor xenograft in BALB/c nude mice and HE staining were utilized to probe into the effects of FLNA-induced regulation of volume, weight and metastasis of tumors. RESULTS We confirmed that FLNA was down-regulated in BC tissues. TEM and fluorescence analysis proved that FLNA overexpression promoted autophagy in BC cells. Colony formation assay and CCK-8 experiment showed that FLNA overexpression suppressed the proliferation of BC cells. In addition, FLNA blocked cell cycle and promoted apoptosis of BC cell. Transwell assay and wound-healing assay further proved that FLNA suppressed invasion and migration ability in BC cell. Meanwhile, in vivo study indicated that FLNA inhibited the tumor growth. CONCLUSION Overexpression of FLNA suppressed the proliferation, migration and invasion of the BC cell, suggesting the potential role of FLNA in clinical treatment.
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Affiliation(s)
- Zhenfan Wang
- Department of Urology, The First Affiliated Hospital of Soochow University, No. 188 Shizi Road, Suzhou, 215006, Jiangsu, China
| | - Chen Li
- Department of Urology, Nanjing Medical University Affiliated Wuxi Second Hospital, Wuxi, 214002, Jiangsu, China
| | - Minjun Jiang
- Department of Urology, The First Hospital of Wujiang, Suzhou, 215200, Jiangsu, China
| | - Jianchun Chen
- Department of Urology, The First Hospital of Wujiang, Suzhou, 215200, Jiangsu, China
| | - Min Yang
- Department of Urology, The First Hospital of Wujiang, Suzhou, 215200, Jiangsu, China
| | - Jinxian Pu
- Department of Urology, The First Affiliated Hospital of Soochow University, No. 188 Shizi Road, Suzhou, 215006, Jiangsu, China.
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