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Jia KW, Yao RQ, Fan YW, Zhang DJ, Zhou Y, Wang MJ, Zhang LY, Dong Y, Li ZX, Wang SY, Wang M, Li YH, Zhang LX, Lei T, Gui LC, Lu S, Yang YY, Wang SX, Yu YZ, Yao YM, Hou J. Interferon-α stimulates DExH-box helicase 58 to prevent hepatocyte ferroptosis. Mil Med Res 2024; 11:22. [PMID: 38622688 PMCID: PMC11017495 DOI: 10.1186/s40779-024-00524-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 03/19/2024] [Indexed: 04/17/2024] Open
Abstract
BACKGROUND Liver ischemia/reperfusion (I/R) injury is usually caused by hepatic inflow occlusion during liver surgery, and is frequently observed during war wounds and trauma. Hepatocyte ferroptosis plays a critical role in liver I/R injury, however, it remains unclear whether this process is controlled or regulated by members of the DEAD/DExH-box helicase (DDX/DHX) family. METHODS The expression of DDX/DHX family members during liver I/R injury was screened using transcriptome analysis. Hepatocyte-specific Dhx58 knockout mice were constructed, and a partial liver I/R operation was performed. Single-cell RNA sequencing (scRNA-seq) in the liver post I/R suggested enhanced ferroptosis by Dhx58hep-/-. The mRNAs and proteins associated with DExH-box helicase 58 (DHX58) were screened using RNA immunoprecipitation-sequencing (RIP-seq) and IP-mass spectrometry (IP-MS). RESULTS Excessive production of reactive oxygen species (ROS) decreased the expression of the IFN-stimulated gene Dhx58 in hepatocytes and promoted hepatic ferroptosis, while treatment using IFN-α increased DHX58 expression and prevented ferroptosis during liver I/R injury. Mechanistically, DHX58 with RNA-binding activity constitutively associates with the mRNA of glutathione peroxidase 4 (GPX4), a central ferroptosis suppressor, and recruits the m6A reader YT521-B homology domain containing 2 (YTHDC2) to promote the translation of Gpx4 mRNA in an m6A-dependent manner, thus enhancing GPX4 protein levels and preventing hepatic ferroptosis. CONCLUSIONS This study provides mechanistic evidence that IFN-α stimulates DHX58 to promote the translation of m6A-modified Gpx4 mRNA, suggesting the potential clinical application of IFN-α in the prevention of hepatic ferroptosis during liver I/R injury.
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Affiliation(s)
- Kai-Wei Jia
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Ren-Qi Yao
- Department of General Surgery, the First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese PLA General Hospital, Beijing, 100853, China
| | - Yi-Wen Fan
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Ding-Ji Zhang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Ye Zhou
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Min-Jun Wang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Li-Yuan Zhang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Yue Dong
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Zhi-Xuan Li
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Su-Yuan Wang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Mu Wang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Yun-Hui Li
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Lu-Xin Zhang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Ting Lei
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Liang-Chen Gui
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Shan Lu
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Ying-Yun Yang
- Center for Immunotherapy, Chinese Academy of Medical Sciences, Beijing, 100005, China
| | - Si-Xian Wang
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Yi-Zhi Yu
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China
| | - Yong-Ming Yao
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese PLA General Hospital, Beijing, 100853, China.
| | - Jin Hou
- National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China.
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Zhang P, Wang J, Wang X, Wang L, Xu S, Gong P. Protectin D1 Alleviates Myocardial Ischemia/Reperfusion Injury by Regulating PI3K/AKT Signaling Pathway. J Cardiovasc Transl Res 2024; 17:376-387. [PMID: 37580643 DOI: 10.1007/s12265-023-10426-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/03/2023] [Indexed: 08/16/2023]
Abstract
Myocardial ischemia/reperfusion (I/R) injury after the onset of acute myocardial infarction (AMI) can be life-threatening, and there is no effective strategy for therapeutic intervention. Here, we studied the potential of protectin D1 in protecting from I/R-induced cardiac damages and investigated the underlying mechanisms. An in vivo rat model of I/R after AMI induction was established through the ligation of the left anterior descending (LAD) artery to assess the cardiac functions and evaluate the protective effect of protectin D1. Protectin D1 protected against I/R-induced oxidative stress and inflammation in the rat model, improved the cardiac function, and reduced the infarct size in myocardial tissues. The beneficial effect of protectin D1 was associated with the up-regulation of miRNA-210 and the effects on PI3K/AKT signaling and HIF-1α expression. Together, our data suggest that protectin D1 could serve as a potential cardioprotective agent against I/R-associated cardiac defects.
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Affiliation(s)
- Peng Zhang
- Department of Cardiology, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen, 518020, Guangdong, China
| | - Jin Wang
- Emergency Department, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, 1017 Dongmen North Road, Luohu District, Shenzhen, 518020, Guangdong, China
| | - Xingsong Wang
- Department of Anesthesiology, Shouxian Chinese Medicine Hospital, Huainan, 232299, Anhui, China
| | - Li Wang
- Emergency Department, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, 1017 Dongmen North Road, Luohu District, Shenzhen, 518020, Guangdong, China
| | - Shihai Xu
- Emergency Department, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, 1017 Dongmen North Road, Luohu District, Shenzhen, 518020, Guangdong, China.
| | - Ping Gong
- Emergency Department, Shenzhen People's Hospital, The Second Clinical Medical College of Jinan University, The First Affiliated Hospital of Southern University of Science and Technology, 1017 Dongmen North Road, Luohu District, Shenzhen, 518020, Guangdong, China.
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Ma Z, Wu Y, Xu J, Cao H, Du M, Jiang H, Qiu F. Sodium Tanshinone IIA Sulfonate Ameliorates Oxygen-glucose Deprivation/Reoxygenation-induced Neuronal Injury via Protection of Mitochondria and Promotion of Autophagy. Neurochem Res 2023; 48:3378-3390. [PMID: 37436612 DOI: 10.1007/s11064-023-03985-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/04/2023] [Accepted: 07/04/2023] [Indexed: 07/13/2023]
Abstract
Sodium tanshinone IIA sulfonate (STS) has shown significant clinical therapeutic effects in cerebral ischemic stroke (CIS), but the molecular mechanisms of neuroprotection remain partially known. The purpose of this study was to explore whether STS plays a protective role in oxygen-glucose deprivation/reoxygenation (OGD/R)-induced neuronal injury by regulating microglia autophagy and inflammatory activity. Co-cultured microglia and neurons were subjected to OGD/R injury, an in vitro model of ischemia/reperfusion (I/R) injury with or without STS treatment. Expression of protein phosphatase 2 A (PP2A) and autophagy-associated proteins Beclin 1, autophagy related 5 (ATG5), and p62 in microglia was determined by Western blotting. Autophagic flux in microglia was observed with confocal laser scanning microscopy. Neuronal apoptosis was measured by flow cytometric and TUNEL assays. Neuronal mitochondrial function was determined via assessments of reactive oxygen species generation and mitochondrial membrane potential integrity. STS treatment markedly induced PP2A expression in microglia. Forced overexpression of PP2A increased levels of Beclin 1 and ATG5, decreased the p62 protein level, and induced autophagic flux. Silencing of PP2A or administration of 3-methyladenine inhibited autophagy and decreased the production of anti-inflammatory factors (IL-10, TGF-β and BDNF) and induced the release of proinflammatory cytokines (IL-1β, IL-2 and TNF-α) by STS-treated microglia, thereby inducing mitochondrial dysfunction and apoptosis of STS-treated neurons. STS exerts protection against neuron injury, and the PP2A gene plays a crucial role in improving mitochondrial function and inhibiting neuronal apoptosis by regulating autophagy and inflammation in microglia.
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Affiliation(s)
- Zhi Ma
- Cerebrovascular Disease Center, Nanjing Brain Hospital Affiliated to Nanjing Medical University, 264 Guangzhou Rd, Nanjing, 210029, Jiangsu, P.R. China
| | - Yue Wu
- Neonatal Medical Center, Children's Hospital of Nanjing Medical University, Nanjing, 210008, Jiangsu Province, China
| | - Juan Xu
- Department of Immunology, Nanjing Medical University, Nanjing, 210029, Jiangsu Province, China
| | - Hui Cao
- Cerebrovascular Disease Center, Nanjing Brain Hospital Affiliated to Nanjing Medical University, 264 Guangzhou Rd, Nanjing, 210029, Jiangsu, P.R. China
| | - Mingyang Du
- Cerebrovascular Disease Center, Nanjing Brain Hospital Affiliated to Nanjing Medical University, 264 Guangzhou Rd, Nanjing, 210029, Jiangsu, P.R. China
| | - Haibo Jiang
- Cerebrovascular Disease Center, Nanjing Brain Hospital Affiliated to Nanjing Medical University, 264 Guangzhou Rd, Nanjing, 210029, Jiangsu, P.R. China
| | - Feng Qiu
- Cerebrovascular Disease Center, Nanjing Brain Hospital Affiliated to Nanjing Medical University, 264 Guangzhou Rd, Nanjing, 210029, Jiangsu, P.R. China.
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Guan Y, Cao YL, Liu JW, Liu LT, Zheng YJ, Ma XF, Zhai FG. Ginsenoside Rg1 attenuates cerebral ischemia-reperfusion injury through inhibiting the inflammatory activation of microglia. Exp Cell Res 2023; 426:113552. [PMID: 36914061 DOI: 10.1016/j.yexcr.2023.113552] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 03/03/2023] [Accepted: 03/10/2023] [Indexed: 03/13/2023]
Abstract
It is recognized that the cerebral ischemia/reperfusion (I/R) injury triggers inflammatory activation of microglia and supports microglia-driven neuronal damage. Our previous studies have shown that ginsenoside Rg1 had a significant protective effect on focal cerebral I/R injury in middle cerebral artery occlusion (MCAO) rats. However, the mechanism still needs further clarification. Here, we firstly reported that ginsenoside Rg1 effectively suppressed the inflammatory activation of brain microglia cells under I/R conditions depending on the inhibition of Toll-likereceptor4 (TLR4) proteins. In vivo experiments showed that the ginsenoside Rg1 administration could significantly improve the cognitive function of MCAO rats, and in vitro experimental data showed that ginsenoside Rg1 significantly alleviated neuronal damage via inhibiting the inflammatory response in microglia cells co-cultured under oxygen and glucose deprivation/reoxygenation (OGD/R) condition in gradient dependent. The mechanism study showed that the effect of ginsenoside Rg1 depends on the suppression of TLR4/MyD88/NF-κB and TLR4/TRIF/IRF-3 pathways in microglia cells. In a word, our research shows that ginsenoside Rg1 has great application potential in attenuating the cerebral I/R injury by targeting TLR4 protein in the microglia cells.
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Affiliation(s)
- Yue Guan
- Department of Clinical Medicine, Heilongjiang Nursing College, Harbin, 150001, Heilongjiang Province, China
| | - Yan-Li Cao
- School of Pharmacy, Mudanjiang Medical University, Mudanjiang, 157011, Heilongjiang Province, China
| | - Jia-Wei Liu
- School of Pharmacy, Mudanjiang Medical University, Mudanjiang, 157011, Heilongjiang Province, China
| | - Lan-Tao Liu
- Graduate School of Mudanjiang Medical University, Mudanjiang, 157011, Heilongjiang Province, China
| | - Yu-Jia Zheng
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, 654-0142, Japan
| | - Xue-Fei Ma
- School of Pharmacy, Mudanjiang Medical University, Mudanjiang, 157011, Heilongjiang Province, China; Department of Pharmacology, Baicheng Medical College, Baicheng, 137701, Jilin Province, China
| | - Feng-Guo Zhai
- Department of Pharmacology, Mudanjiang Medical University, Mudanjiang, 157011, Heilongjiang Province, China; Institute of Natural Medicine, Mudanjiang Medical University, Mudanjiang, 157011, Heilongjiang Province, China.
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Sun K, Zhang J, Yang Q, Zhu J, Zhang X, Wu K, Li Z, Xie W, Luo X. MiR-10b-3p alleviates cerebral ischemia/reperfusion injury by targeting Krüppel-like factor 5 (KLF5). Pflugers Arch 2022. [PMID: 34989875 DOI: 10.1007/s00424-021-02645-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 10/19/2022]
Abstract
Although miR-10b-3p has been identified to be involved in cerebral ischemia injury, its impact and specific mechanism in cerebral ischemia injury remain unclear. The effects of Mir-10b-3p were investigated by establishing rat and cell models of ischemia/reperfusion (I/R) injury. Oxygen-glucose deprivation/reperfusion (OGD/R) was performed on pheochromocytoma-12 (PC12) cells. MiR-10b-3p expression levels in brain tissues and PC12 cells were detected by qRT-PCR. The impacts of miR-10b-3p on neurological deficits, infarct volume, inflammatory factor expression, in vivo brain water content, cell viability, and cell apoptosis were assessed. The relationship between miR-10b-3p and KLF5 was determined by TargetScan and luciferase reporter assay. The rescue experiments were performed to confirm the role of this axis in cerebral ischemia injury. Mir-10b-3p levels in rat brain tissue and PC12 cells were significantly decreased after I/R injury. MiR-10b-3p overexpression obviously reduced neurological deficits, infarct volume, brain water content, inflammatory factors expression, and neuronal apoptosis in the brain of ischemia-stroked rats. Meanwhile, miR-10b-3p upregulation also inhibited cell viability and apoptosis of OGD/R-induced PC12 cells. Besides, KLF5 was identified as a target of miR-10b-3p, and rescue experiments revealed that KLF5 was involved in the regulation of miR-10b-3p in ischemic injury. Our results demonstrated that miR-10b-3p had the neuroprotective effects against ischemia injury by targeting KLF5 and provided a potential underlying target for ischemic stroke treatment.
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Moshkelani S, Asghari A, Abedi G, Jahandideh A, Mortazavi P. Effects of Magnesium Sulfate Administration on Testicular Ischemia/Reperfusion Injury in Rats. Arch Razi Inst 2020; 75:83-91. [PMID: 32292006 DOI: 10.22092/ari.2018.123458.1251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 11/21/2018] [Indexed: 09/30/2022]
Abstract
This study aimed at investigating the effects of intraperitoneal (IP) administration of magnesium sulfate (MgSO4) on testicular ischemia-reperfusion (IR) injury in rats. In total, 50 adult Wistar rats were randomly divided into 5 groups. Group 1 received no injection (control); however, group 2 was subjected to 2 h of I and 24 h of R. Subsequently, group 3 was subjected to 2 h of 1, and after 1 h of I, 125 mg/kg MgSO4 was injected intraperitoneally followed by 24 h of R. Groups 4 and 5 were subjected to the same process as group 3, whereas the rats were injected with 250 and 500 mg/kg of MgSO4, respectively. After 24 h, the left testes of all rats were removed for histological analysis and antioxidant activities. According to the results, there was a significant increase in tissue malondialdehyde (MDA) among I/R rats (P<0.05), whereas MgSO4 decreased I/R-induced MDA (P<0.05). Furthermore, experimental I/R diminished glutathione peroxidase (GPx) and superoxide dismutase (SOD) levels significantly (P<0.05). Moreover, MgSO4 (250 and 500 mg/kg) increased GPx and SOD activity significantly in I/R rats (P<0.05). Furthermore, seminiferous tubules degenerated, and few spermatocytes were observed in the testis tubules of the I/R rats. Regarding pathological parameters, seminiferous tubules and spermatocyte were normal in the testes of MgSO4 (250 and 500 mg/kg)-treated experimental I/R-induced rats. In conclusion, this study demonstrated the beneficial effects of MgSO4 on testicular IR injury in rats.
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Affiliation(s)
- S Moshkelani
- Department of Clinical Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - A Asghari
- Department of Clinical Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran.,Department of Clinical Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - G Abedi
- Department of Clinical Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - A Jahandideh
- Department of Clinical Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - P Mortazavi
- Department of Pathobiology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Zhang Y, Liu D, Hu H, Zhang P, Xie R, Cui W. HIF-1α/BNIP3 signaling pathway-induced-autophagy plays protective role during myocardial ischemia-reperfusion injury. Biomed Pharmacother 2019; 120:109464. [PMID: 31590128 DOI: 10.1016/j.biopha.2019.109464] [Citation(s) in RCA: 116] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 09/10/2019] [Accepted: 09/12/2019] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE The study was established to inquire into the protective effect of the HIF-1α (Hypoxia-inducible factor-1α)/ BNIP3(Bcl-2/adenovirus E1B 19-kDa interacting protein) signal path-induced-autophagy during myocardial ischemia/ reperfusion (I/R) and oxygen-glucose deprivation/recovery (OGD/R) injury in heart-derived H9C2 cells as well as its potential underlying mechanism. METHODS Immediate myocardial I/R in SD (Spraque Dawley) rats and cytotoxicity of OGD/R injury on H9C2 cells with and without inhibitors or agonists of HIF-1α and BNIP3 were evaluated. Expression of mitochondrial autophagic protein were detected by Western blot and immunofluorescence. And the mitochondrial autophagosome were detected using Transmission Electron Microscope (TEM). RESULTS I/R and OGD/R injury increased the expression level of HIF-1α, activated the downstream BNIP3 and subsequently triggered mitochondria-dependent autophagy. Up-regulation the expression of HIF-1α and BNIP3 may promote the cardiac myocytes of SD rats of I/R injure and OGD/R injury-induced autophagy of H9C2 cells. Moreover, down-regulation the expression of HIF-1α or BNIP3-siRNA decreased H9C2 cells autophagy under OGD/R injury. CONCLUSIONS Together, our studies indicated that HIF-1α synchronization regulate BNIP3 during OGD/R injury-induced autophagy in H9C2 cells, though BNIP3-induced autophagy acting as a survival mechanism.
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Affiliation(s)
- Yanan Zhang
- First Department of Cardiology, The Second Hospital of Hebei Medical University, Hebei Institute of Cardiovascular Research, Hebei, 050000, China
| | - Dawei Liu
- First Department of Cardiology, The Second Hospital of Hebei Medical University, Hebei Institute of Cardiovascular Research, Hebei, 050000, China
| | - Haijuan Hu
- First Department of Cardiology, The Second Hospital of Hebei Medical University, Hebei Institute of Cardiovascular Research, Hebei, 050000, China
| | - Puqiang Zhang
- First Department of Cardiology, The Second Hospital of Hebei Medical University, Hebei Institute of Cardiovascular Research, Hebei, 050000, China
| | - Ruiqin Xie
- First Department of Cardiology, The Second Hospital of Hebei Medical University, Hebei Institute of Cardiovascular Research, Hebei, 050000, China
| | - Wei Cui
- First Department of Cardiology, The Second Hospital of Hebei Medical University, Hebei Institute of Cardiovascular Research, Hebei, 050000, China.
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Han MX, Xu XW, Lu SQ, Zhang GX. Effect of olprinone on ischemia-reperfusion induced myocardial injury in rats. Biomed Pharmacother 2019; 111:1005-1012. [PMID: 30841413 DOI: 10.1016/j.biopha.2019.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/02/2019] [Accepted: 01/05/2019] [Indexed: 01/22/2023] Open
Abstract
AIMS This study investigated the effect of olprinone on ischemia-reperfusion (I/R) induced cardiac injury, and the underlying mechanism. MAIN METHODS Male Sprague-Dawley rats were subjected to a 30-min coronary arterial occlusion followed by 24 h reperfusion. After the start of reperfusion, rats were respectively treated with olprinone in three different dosages (0.2, 0.6, 2 mg/kg, intraperitoneal injection, i.p./12 h). Twenty-four hours later, a mean arterial pressure (MAP) heart function analysis system was used to monitor hemodynamic parameters; TTC staining method was used to detect the myocardial infarct size; 24-hour mortality of rats was recorded; western blot was used to detect the protein expressions of Caspase-3, Bax, Bcl-2, Beclin-1 and LC3-II/LC3-I. RESULTS Cardiac function in I/R group was lower than that in sham group (dp/dt max: 1348.29 ± 266.01 vs. 3333.73 ± 1258.03, -dp/dt max: 1163.23 ± 588.18 vs. 3198.93 ± 1416.00, P < 0.05), which was significantly improved by treatment with high dosage of olprinone (dp/dt max: 1348.29±266.01 vs. 2022.43±493.39, -dp/dt max: 1163.23±588.18 vs. 1784.50±418.92, P < 0.05). The percentage of myocardial infarct size in medium and high dosages of olprinone group was lower than that in I/R group (42.67 ± 2.94, 22.33 ± 3.63 vs. 63.67 ± 5.86, P < 0.05). There was no significant difference in mortality among each group within 24 h. Compared with sham group, the expression of Caspase-3 was significantly up-regulated in I/R group (3.44±0.47-fold of sham, P < 0.05), which was inhibited by medium dosage of olprinone treatment (2.00±0.52-fold of sham, P < 0.05 vs. I/R group); also, expression of Bax was increased compared with sham group (4.06±0.25-fold of sham, P < 0.05), which was markedly inhibited by all dosages of olprinone treatment (low: 2.16±0.61-fold, medium: 2.74±0.66-fold, high 1.65±0.55-fold, P < 0.05 vs. I/R group). Expression of Bcl-2 was increased after I/R (1.17±0.06-fold, P < 0.05), which was further elevated in all dosages of olprinone treatment (low: 1.62 ± 0.13-fold, medium: 1.46 ± 0.13-fold, high: 1.82 ± 0.39-fold, P < 0.05 vs. I/R group). In addition, compared with sham group, the expression of Beclin-1 was up-regulated to 1.44±0.05-fold of sham in I/R group (P < 0.05), which was further increased in low and medium dosages of olprinone group (low: 2.46±0.44-fold, medium: 2.80±0.75-fold, P < 0.05 vs. I/R group). Moreover, expression of LC3-II was elevated in low dosage of olprinone treated group (low: 4.50±0.47-fold, P < 0.05 vs. I/R group). CONCLUSIONS Olprinone improves the cardiac function in response to myocardial I/R injury by regulation of anti-apoptotic, pro-apoptotic. In addition, autophagic signal pathways may also play a role in olprinone's therapeutic effect.
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Affiliation(s)
- Meng-Xiao Han
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou, 215123, PR China
| | - Xiao-Wen Xu
- Department of Emergency, The First Affiliated Hospital, Soochow University, 188 Shi-Zi Road, Suzhou, 215006, PR China; Department of Emergency, Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Suzhou, PR China
| | - Shi-Qi Lu
- Department of Emergency, The First Affiliated Hospital, Soochow University, 188 Shi-Zi Road, Suzhou, 215006, PR China.
| | - Guo-Xing Zhang
- Department of Physiology, Medical College of Soochow University, 199 Ren-Ai Road, Dushu Lake Campus, Suzhou Industrial Park, Suzhou, 215123, PR China.
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Sun Y, Xun L, Jin G, Shi L. Salidroside protects renal tubular epithelial cells from hypoxia/reoxygenation injury in vitro. J Pharmacol Sci 2018; 137:170-176. [PMID: 29960844 DOI: 10.1016/j.jphs.2018.05.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/19/2018] [Accepted: 05/24/2018] [Indexed: 11/29/2022] Open
Abstract
Oxidative stress, inflammation and cell apoptosis are important mechanisms of renal ischemia/reperfusion (I/R) injury. Salidroside, a natural phenylpropanoid glycoside, possesses anti-inflammatory, anti-oxidative, and anti-apoptotic effects. However, the effect of salidroside on renal I/R injury has not been fully elucidated. The present study aimed to investigate the effect of salidroside on renal I/R injury in vitro. Our results showed that salidroside improved the viability of human renal tubular epithelial cells (HK-2) in response to hypoxia/reoxygenation (H/R). Salidroside caused apparent decrease in the levels of reactive oxygen species (ROS) and malondiaidehyde (MDA), and significant increase in superoxide dismutase (SOD) activity in HK-2 cells. Pretreatment with salidroside markedly inhibited the production levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and IL-6 in a dose-dependent manner. Salidroside treatment exhibited significant increase in Bcl-2 expressions, and decrease in Bax expressions and caspase-3 activity when compared with the H/R group. Salidroside decreased the levels of toll-like receptor 4 (TLR4) and p-p65 in HK-2 cells. Overexpression of TLR4 significantly attenuated the effects of salidroside on cell viability, oxidative stress, cytokine production and cell apoptosis in HK-2 cells. These findings indicated that salidroside protected HK-2 cells from H/R stimulation, which was mediated by the TLR4/NF-κB pathway.
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Affiliation(s)
- Yan Sun
- Department of Nephrology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Liru Xun
- Department of Nephrology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Gang Jin
- Department of Nephrology, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Lei Shi
- Department of Infectious Disease, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China.
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10
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Lv D, Cheng X, Tang L, Jiang M. The cardioprotective effect of total flavonoids on myocardial ischemia/reperfusion in rats. Biomed Pharmacother 2017; 88:277-84. [PMID: 28110194 DOI: 10.1016/j.biopha.2017.01.060] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 01/07/2017] [Accepted: 01/10/2017] [Indexed: 02/02/2023] Open
Abstract
The flowers of Abelmoschus manihot (L.) Medic is a traditional Chinese medicine used for the treatment of ischemic diseases. The present study is to investigate whether total flavones (TA) of extracted from Abelmoschus manihot L. Medic has the potential cardioprotective effect on myocardial ischemia/reperfusion (I/R) damage in rats. The index of myocardial injury, inflammatory biomarkers and NLRP3-related parameters were measured, respectively. The results demonstrated that compared to I/R group, TA reduced myocardial infarction area, declined serum creatinine kinase (CK), lactate dehydrogenase (LDH) levels, attenuated serum interleukin-6 (IL-6), IL-1β and tumour necrosis factor (TNF-α) production. Moreover, TA markedly enhanced the activities of superoxide dismutase (SOD) and reduced the amounts of malondialdehyde (MDA) in I/R rats. In addition, TA reduced myocardial I/R induced injury in rats by inhibiting NLRPR3 inflammasome. Thus, it is assumed that TA could significantly improve myocardial I/R injury in rats partially through suppressing NLRP3 activtion.
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11
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Yung BS, Brand CS, Xiang SY, Gray CBB, Means CK, Rosen H, Chun J, Purcell NH, Brown JH, Miyamoto S. Selective coupling of the S1P 3 receptor subtype to S1P-mediated RhoA activation and cardioprotection. J Mol Cell Cardiol 2016; 103:1-10. [PMID: 28017639 PMCID: PMC5410967 DOI: 10.1016/j.yjmcc.2016.12.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 12/16/2016] [Accepted: 12/19/2016] [Indexed: 01/17/2023]
Abstract
Sphingosine-1-phosphate (S1P), a bioactive lysophospholipid, is generated and released at sites of tissue injury in the heart and can act on S1P1, S1P2, and S1P3 receptor subtypes to affect cardiovascular responses. We established that S1P causes little phosphoinositide hydrolysis and does not induce hypertrophy indicating that it does not cause receptor coupling to Gq. We previously demonstrated that S1P confers cardioprotection against ischemia/reperfusion by activating RhoA and its downstream effector PKD. The S1P receptor subtypes and G proteins that regulate RhoA activation and downstream responses in the heart have not been determined. Using siRNA or pertussis toxin to inhibit different G proteins in NRVMs we established that S1P regulates RhoA activation through Gα13 but not Gα12, Gαq, or Gαi. Knockdown of the three major S1P receptors using siRNA demonstrated a requirement for S1P3 in RhoA activation and subsequent phosphorylation of PKD, and this was confirmed in studies using isolated hearts from S1P3 knockout (KO) mice. S1P treatment reduced infarct size induced by ischemia/reperfusion in Langendorff perfused wild-type (WT) hearts and this protection was abolished in the S1P3 KO mouse heart. CYM-51736, an S1P3-specific agonist, also decreased infarct size after ischemia/reperfusion to a degree similar to that achieved by S1P. The finding that S1P3 receptor- and Gα13-mediated RhoA activation is responsible for protection against ischemia/reperfusion suggests that selective targeting of S1P3 receptors could provide therapeutic benefits in ischemic heart disease.
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Affiliation(s)
- Bryan S Yung
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States
| | - Cameron S Brand
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States
| | - Sunny Y Xiang
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States
| | - Charles B B Gray
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States
| | | | - Hugh Rosen
- Department of Chemical Physiology, Scripps Research Institute, La Jolla, CA 92037, United States
| | - Jerold Chun
- Department of Molecular and Cellular Neuroscience, Dorris Neuroscience Center, Scripps Research Institute, La Jolla, CA 92037, United States
| | - Nicole H Purcell
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States
| | - Joan Heller Brown
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States.
| | - Shigeki Miyamoto
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA 92093, United States.
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12
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Gao ZJ, Min J, Wu XC, Yang T, Yan CY, Dong BH, Zhang T. Repression of neuronal nitric oxide (nNOS) synthesis by MTA1 is involved in oxidative stress-induced neuronal damage. Biochem Biophys Res Commun 2016; 479:40-7. [PMID: 27603575 DOI: 10.1016/j.bbrc.2016.09.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 09/03/2016] [Indexed: 12/14/2022]
Abstract
The Metastasis-associated protein 1 (MTA1) coregulator, an essential component of the nucleosome remodeling and deacetylase (NuRD) complex, potentiates neuroprotective effects against ischemia/reperfusion (I/R) injury. But the underlying mechanism(s) remain largely unknown. Here, we discovered that neuronal MTA1 was a target of oxidative stress, and stimulation of neurons with oxygen glucose deprivation (OGD) treatment significantly inhibited MTA1 expression. Additionally, MTA1 depletion augmented ischemic oxidative stress and thus promoted oxidative stress-induced neuronal cell death by OGD. While studying the impact of MTA1 status on global neuronal gene expression, we unexpectedly discovered that MTA1 may modulate OGD-induced neuronal damage via regulation of distinct nitric oxide synthase (NOS) (namely neuronal NOS, nNOS) signaling. We provided in vitro evidence that NOS1 is a chromatin target of MTA1 in OGD-insulted neurons. Mechanistically, neuronal ischemia-mediated repression of NOS1 expression is accompanied by the enhanced recruitment of MTA1 along with histone deacetylases (HDACs) to the NOS1 promoter, which could be effectively blocked by a pharmacological inhibitor of the HDACs. These findings collectively reveal a previously unrecognized, critical homeostatic role of MTA1, both as a target and as a component of the neuronal oxidative stress, in the regulation of acute neuronal responses against brain I/R damage. Our study also provides a molecular mechanistic explanation for the previously reported neurovascular protection by selective nNOS inhibitors.
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Affiliation(s)
- Zi-Jun Gao
- Department of Anesthesiology, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China
| | - Jie Min
- Department of Ophthalmology, Xi'an No. 4 Hospital, Guangren Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - Xu-Cai Wu
- Department of Anesthesiology, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China
| | - Tian Yang
- The 1st Cadet Brigade, Fourth Military Medical University, Xi'an 710032, China
| | - Chang-You Yan
- Xi'an Health Management Service Center, Xi'an 710032, China
| | - Bu-Huai Dong
- Department of Anesthesiology, Honghui Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710054, China.
| | - Tao Zhang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
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Wang A, Zhang H, Liang Z, Xu K, Qiu W, Tian Y, Guo H, Jia J, Xing E, Chen R, Xiang Z, Liu J. U0126 attenuates ischemia/reperfusion-induced apoptosis and autophagy in myocardium through MEK/ERK/EGR-1 pathway. Eur J Pharmacol 2016; 788:280-285. [PMID: 27343376 DOI: 10.1016/j.ejphar.2016.06.038] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 06/15/2016] [Accepted: 06/22/2016] [Indexed: 12/31/2022]
Abstract
Myocardial ischemia is one of the main causes of sudden cardiac death worldwide. Depending on the cell type and stimulus, ERK activity mediates different anti-proliferative events, such as apoptosis, autophagy, and senescence. The aim of this study was to determine the protective effect of 1,4-diamino-2,3-dicyano-1,4-bis[2-aminophenylthio] butadiene (U0126), an ERK kinase inhibitor, on myocardial ischemia/reperfusion (I/R) injury and the mechanisms involved. An I/R model was established in vivo in C57BL/6 mice and in vitro using mouse cardiomyocytes, respectively. To evaluate the protective effects of U0126 on I/R injury, we measured the myocardial infarct area, apoptosis, and autophagy. Our data indicated that pretreatment with U0126 significantly reduced the infarct area caused by I/R. Moreover, U0126 reduced the caspase-3 activity and the number of TUNEL-positive cardiomyocytes, which together indicate decreased apoptosis. Additionally, U0126 remarkable reduced the level of Beclin-1 and LC3 and increased p62 expression, which indicates that U0126 suppressed H/R-induced autophagy. Furthermore, the relationship between U0126 and MEK/ERK pathway activation in H/R-induced cardiomyocytes was also investigated. U0126 ameliorated H/R injury through inhibition of the MEK/ERK pathway and by suppressing in the downstream EGR-1 expression. Together, our research suggests that U0126 may protect against H/R injury by preventing H/R-induced myocardium apoptosis and autophagy via the MEK/ERK/EGR-1 pathway, and may be a potential therapeutic approach for attenuating myocardial I/R injury.
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Affiliation(s)
- Anxing Wang
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Huijun Zhang
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China.
| | - Zeming Liang
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Kai Xu
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Weifeng Qiu
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Yongbo Tian
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Hong Guo
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Junzheng Jia
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Erke Xing
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Rufei Chen
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Zongxing Xiang
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
| | - Jia Liu
- The Second Department of Cardiovascular, Baoji City Traditional Chinese Medicine Hospital, Baoji, Shaanxi 721001, PR China
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Guo J, Zhang T, Yu J, Li HZ, Zhao C, Qiu J, Zhao B, Zhao J, Li W, Zhao TZ. Neuroprotective effects of a chromatin modifier on ischemia/reperfusion neurons: implication of its regulation of BCL2 transactivation by ERα signaling. Cell Tissue Res 2016; 364:475-488. [PMID: 26728277 DOI: 10.1007/s00441-015-2347-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 12/10/2015] [Indexed: 12/26/2022]
Abstract
An understanding of the molecular mechanisms involved in the regulation of estrogen receptor alpha (ERα)-mediated neuroprotective effects is valuable for the development of therapeutic strategy against neuronal ischemic injury. Here, we report the upregulated expression of metastasis-associated protein 1 (MTA1), a master chromatin modifier and transcriptional regulator, in the murine middle cerebral artery occlusion (MCAO) model. Inhibition of MTA1 expression by in vivo short interfering RNA treatment potentiated neuronal apoptosis in a caspase-3-dependent manner and thereafter aggravated MCAO-induced neuronal damage. Mechanistically, the pro-survival effects of MTA1 required the participation of ERα signaling. We also provide in vitro evidence that MTA1 enhances the binding of ERα with the BCL2 promoter upon ischemic insults via recruitment of HDAC2 together with other unidentified coregulators, thus promoting the ERα-mediated transactivation of the BCL2 gene. Collectively, our results suggest that the augmentation of endogenous MTA1 expression during neuronal ischemic injury acts additionally to an endocrinous cascade orchestrating intimate interactions between ERα and BCL2 pathways and operates as an indispensable defensive mechanism in response to neuronal ischemia/reperfusion stress. Future studies in this field will shed light on the modulation of the complicated neuroprotective effects by estrogen signaling.
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Affiliation(s)
- Jun Guo
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Tao Zhang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Jia Yu
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Hong-Zeng Li
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Cong Zhao
- Department of Neurology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Jing Qiu
- Department of Neurology, General Hospital of Shenyang Military Command, Shenyang, 110015, People's Republic of China
| | - Bo Zhao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China
| | - Jie Zhao
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Wei Li
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, People's Republic of China.
| | - Tian-Zhi Zhao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, People's Republic of China.
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15
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Xing Y, Tang B, Zhu C, Li W, Li Z, Zhao J, Gong WD, Wu ZQ, Zhu CC, Zhang YQ. N-myc downstream-regulated gene 4, up-regulated by tumor necrosis factor-α and nuclear factor kappa B, aggravates cardiac ischemia/reperfusion injury by inhibiting reperfusion injury salvage kinase pathway. Basic Res Cardiol 2016; 111:11. [PMID: 26780215 DOI: 10.1007/s00395-015-0519-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 10/08/2015] [Accepted: 10/27/2015] [Indexed: 12/20/2022]
Abstract
N-myc downstream-regulated gene 4 (NDRG4) is expressed weakly in heart and has been reported to modulate cardiac development and QT interval duration, but the role of NDRG4 in myocardial ischemia/reperfusion (I/R) injury remains unknown. In the present study, we analyzed the expression as well as potential function of cardiac NDRG4 and investigated how NDRG4 expression is regulated by inflammation. We found that NDRG4 was weakly expressed in cardiomyocytes and that its expression increased significantly both in I/R injured heart and in hypoxia-reoxygenation (H/R) injured neonatal rat ventricular myocytes (NRVMs). The increased NDRG4 expression aggravated myocardial I/R injury by inhibiting the activation of the reperfusion injury salvage kinase (RISK) pathway. Forced over-expression of NDRG4 inhibited RISK activation and exacerbated injury not only in I/R injured heart, but also in H/R treated NRVMs, whereas short hairpin RNA (shRNA)-mediated knock-down of NDRG4 enhanced RISK activation and attenuated injury. Upon injury, myocardial NDRG4 expression was induced by tumor necrosis factor-α (TNF-α) through nuclear factor kappa B (NF-κB), and we found that pre-treatment with inhibitors of either TNF-α or NF-κB blocked NDRG4 expression as well as I/R injury in vivo and H/R injury in vitro. Our study indicates that up-regulation of NDRG4 aggravates myocardial I/R injury by inhibiting activation of the RISK pathway, thereby identifying NDRG4 as a potential therapeutic target in I/R injury.
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Affiliation(s)
- Yuan Xing
- Department of Physiology, Fourth Military Medical University, Xi'an, 710032, China
| | - Bin Tang
- Department of International Medical, China-Japan Frindship Hospital, Beijing, 100029, China
| | - Chao Zhu
- Institute of Orthopaedics, Xi'jing Hospital, Fourth Military Medical University, Xi'an, 710032, China
| | - Wei Li
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, China
| | - Zhen Li
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, China
| | - Jie Zhao
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, China
| | - Wei-dong Gong
- Department of Interventional Radiology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China
| | - Zhi-qun Wu
- Department of Interventional Radiology, Tangdu Hospital, Fourth Military Medical University, Xi'an, 710038, China.
| | - Chu-chao Zhu
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, China.
| | - Yuan-qiang Zhang
- Department of Histology and Embryology, Fourth Military Medical University, Xi'an, 710032, China.
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16
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Li Z, Wang Y. Effect of NADPH oxidase inhibitor-apocynin on the expression of Src homology-2 domain-containing phosphatase-1 (SHP-1) exposed renal ischemia/reperfusion injury in rats. Toxicol Rep 2015; 2:1111-1116. [PMID: 28962452 PMCID: PMC5598411 DOI: 10.1016/j.toxrep.2015.07.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 07/27/2015] [Accepted: 07/28/2015] [Indexed: 11/29/2022] Open
Abstract
This study was designed to evaluate whether NADPH oxidase inhibitor (apocynin) preconditioning induces expression of Src homology-2 domain-containing phosphatase-1 (SHP-1) to protect against renal ischemia/reperfusion (I/R) injury (RI/RI) in rats. Rats were pretreated with 50 mg/kg apocynin, then subjected to 45 min ischemia and 24 h reperfusion. The results indicated that apocynin preconditioning improved the recovery of renal function and nitroso-redox balance, reduced oxidative stress injury and inflammation damage, and upregulated expression of SHP-1 as compared to RI/RI group. Therefore our study demonstrated that apocynin preconditioning provided a protection to the kidney against I/R injury in rats partially through inducing expression of SHP-1.
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Affiliation(s)
- Zhiming Li
- Center for Information Technology, Hexi University, 846 Huancheng North Road, Zhangye 734000, PR China
- Department of Pharmacology, Medical College, Hexi University, 24 Danxia East Road, Zhangye 734000, PR China
| | - Yumei Wang
- Center for Information Technology, Hexi University, 846 Huancheng North Road, Zhangye 734000, PR China
- Department of Pharmacology, Medical College, Hexi University, 24 Danxia East Road, Zhangye 734000, PR China
- Corresponding author at: Department of Pharmacology, Medical College, Hexi University, 24 Danxia East Road, Zhangye,734000, PR China.
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Guo J, Wang SB, Yuan TY, Wu YJ, Yan Y, Li L, Xu XN, Gong LL, Qin HL, Fang LH, Du GH. Coptisine protects rat heart against myocardial ischemia/reperfusion injury by suppressing myocardial apoptosis and inflammation. Atherosclerosis 2013; 231:384-91. [PMID: 24267256 DOI: 10.1016/j.atherosclerosis.2013.10.003] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 09/12/2013] [Accepted: 10/02/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE Protecting the heart from myocardial ischemia and reperfusion (I/R) damage is the focus of intense research. Coptisine is an isoquinoline alkaloid isolated from Coptidis Rhizoma. The present study investigated the potential effect of coptisine on myocardial I/R damage in rats and the underlying mechanisms. METHODS AND RESULTS Electrocardiogram examination showed that the administration of coptisine 10 min before ischemia significantly decreased I/R-induced arrhythmia after 30 min ischemia followed by 3 h reperfusion. The release of cardiac markers was also limited. Echocardiography was performed before ischemia and 24 h post-I/R, separately. The M-mode records showed that the reductions of ejection fraction (EF) and fractional shortening (FS) were attenuated in coptisine-treated rats compared with the I/R rats. Similar results were obtained with Evans Blue/triphenyl tetrazolium chloride (TTC) staining, in which coptisine notably reduced infarct size. Moreover, terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay demonstrated coptisine suppressed myocardial apoptosis, which may be related to the upregulation of Bcl-2 protein and inhibition of caspase-3 activation. Coptisine treatment also attenuated the proinflammatory cytokines including interleukin (IL)-1β, IL-6, and tumor necrosis factor-α in heart tissue. Additionally, Western blot and immunohistochemical analysis showed that coptisine markedly reduced Rho, Rho-kinase 1 (ROCK1), and ROCK2 expression and attenuated the phosphorylation of myosin phosphatase targeting subunit-1, a downstream target of ROCK. CONCLUSIONS Coptisine exerts pronounced cardioprotection in rats subjected to myocardial I/R likely through suppressing myocardial apoptosis and inflammation by inhibiting the Rho/ROCK pathway.
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Affiliation(s)
- Jing Guo
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China; State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, China.
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