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Yousefzadeh N, Jeddi S. Long-term Ovariectomy Reduces Tolerance of Rats to Myocardial Ischemia-reperfusion Injury. Int J Endocrinol Metab 2023; 21:e135101. [PMID: 38028249 PMCID: PMC10676666 DOI: 10.5812/ijem-135101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 05/07/2023] [Accepted: 05/30/2023] [Indexed: 12/01/2023] Open
Abstract
Background The harmful impact of ovariectomy on myocardial ischemia-reperfusion (M/IR) injury has been established in the short term. Objectives In this study, we aimed to investigate the long-term effects of ovariectomy on M/IR injury. Methods Two methods involving dorsolateral skin incisions were used to induce the ovariectomized (OVX) rat model. The rats were divided into 2 groups: Control and OVX (n = 6). At the end of the study, the hearts were isolated and subjected to global ischemia using the Langendorff apparatus. Cardiac function indices (CFIs) were recorded, including left ventricular end-diastolic pressure (LVEDP), peak rates of positive (+dp/dt) and negative (-dp/dt) changes in LV pressure, and LV-developed pressure (LVDP). At the end of the reperfusion period, the hearts were used to measure the size of the infarct, levels of nitric oxide metabolites (NOx), and mRNA expression of NO synthase (NOS) enzymes, including endothelial (eNOS), neuronal (nNOS), and inducible (iNOS). Results Compared to controls, OVX rats had larger infarct size by 51%, higher LVEDP by 29%, and lower recovery of +dp/dt, -dp/dt, and LVDP by 29%, 22%, and 35%, respectively. Furthermore, in heart tissue, rats that underwent OVX had significantly higher concentrations of nitrate, nitrite, and NOx by 79%, 82%, and 83%, respectively. Additionally, these rats had lower mRNA levels of eNOS by 38% and higher mRNA levels of iNOS by 71%. Conclusions The long-term deficiency of estrogen increased the expression of iNOS and decreased the expression of eNOS in the heart tissue of OVX rats. Imbalanced NOS expressions were associated with exacerbated responses to M/IR injury in OVX rats.
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Affiliation(s)
- Nasibeh Yousefzadeh
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sajad Jeddi
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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de Oliveira T, Gonçalves G. Ovarian hormones influence immune response to liver ischemia-reperfusion. Braz J Med Biol Res 2023; 56:e12650. [PMID: 36946841 PMCID: PMC10021499 DOI: 10.1590/1414-431x2023e12650] [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: 10/28/2022] [Accepted: 02/07/2023] [Indexed: 03/22/2023] Open
Abstract
Liver injury occurs after ischemia and reperfusion (IR), as seen in transplant settings. Sex hormones have been implicated in many pathophysiological mechanisms in females and this could lead to liver protection under inflammatory reperfusion conditions where an excessive immune response occurs. Despite such assumptions, this fact needs to be further investigated. To address this, female and male C57BL/6J mice (8-12 weeks old) were studied. Bilateral ovariectomy (OVX) was performed in females to decrease estradiol levels. IR was performed, and after two weeks, all animals underwent a sham control operation or IR with euthanasia at the following time points after reperfusion: 6, 12, 24, and 48 h. IR triggered an inflammatory process in the liver with recruitment of neutrophils into the parenchyma of male mice. The female sham mice were protected against liver IR presenting no alteration of aminotransferase (ALT) levels compared to males. OVX caused loss of protection, increasing hepatic injury as represented by increased ALT levels and myeloperoxidase (MPO) activity. Female sham mice showed increased Akt phosphorylation and activation, while males showed reduced Akt activation. Estradiol pretreatment recovered ALT levels after IR injury, which was associated with decreased liver injury.
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Affiliation(s)
- T.H.C. de Oliveira
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
- Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, MG, Brasil
| | - G.K.N. Gonçalves
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
- Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, MG, Brasil
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3
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Chen Z, Wu J, Li S, Liu C, Ren Y. Inhibition of Myocardial Cell Apoptosis Is Important Mechanism for Ginsenoside in the Limitation of Myocardial Ischemia/Reperfusion Injury. Front Pharmacol 2022; 13:806216. [PMID: 35300297 PMCID: PMC8921549 DOI: 10.3389/fphar.2022.806216] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 02/09/2022] [Indexed: 12/25/2022] Open
Abstract
Ischemic heart disease has a high mortality, and the recommended therapy is reperfusion. Nevertheless, the restoration of blood flow to ischemic tissue leads to further damage, namely, myocardial ischemia/reperfusion injury (MIRI). Apoptosis is an essential pathogenic factor in MIRI, and ginsenosides are effective in inhibiting apoptosis and alleviating MIRI. Here, we reviewed published studies on the anti-apoptotic effects of ginsenosides and their mechanisms of action in improving MIRI. Each ginsenoside can regulate multiple pathways to protect the myocardium. Overall, the involved apoptotic pathways include the death receptor signaling pathway, mitochondria signaling pathway, PI3K/Akt signaling pathway, NF-κB signaling pathway, and MAPK signaling pathway. Ginsenosides, with diverse chemical structures, regulate different apoptotic pathways to relieve MIRI. Summarizing the effects and mechanisms of ginsenosides contributes to further mechanism research studies and structure–function relationship research studies, which can help the development of new drugs. Therefore, we expect that this review will highlight the importance of ginsenosides in improving MIRI via anti-apoptosis and provide references and suggestions for further research in this field.
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Affiliation(s)
- Zhihan Chen
- School of Acupuncture Moxibustion and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jingping Wu
- Department of Medical Cosmetology, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Sijing Li
- School of Acupuncture Moxibustion and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Caijiao Liu
- School of Acupuncture Moxibustion and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yulan Ren
- School of Chinese Classics, Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Cardioprotective effects of severe calorie restriction from birth in adult ovariectomized rats. Life Sci 2021; 275:119411. [PMID: 33774029 DOI: 10.1016/j.lfs.2021.119411] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/09/2021] [Accepted: 03/22/2021] [Indexed: 02/08/2023]
Abstract
AIMS Menopause is a female condition induced by a reduction of ovarian hormone and is related to an increase in cardiovascular diseases in women. We have shown that severe calorie restriction (SCR) from birth reduces the cardiometabolic risk in adult male Wistar rats. In this study, we investigated the effects of SCR from birth to adulthood on cardiovascular function of ovariectomized rats. MAIN METHODS From birth to adulthood, rats were daily fed ad libitum (control group - C) or with 50% of the amount consumed by the control group (calorie-restricted group - R). At 90 days, half of the rats in each group underwent bilateral ovariectomy (OVX), totaling 4 groups: C-Sham, C-OVX, R-Sham, R-OVX. Systolic blood pressure (SBP), heart rate (HR) and, double product (DP) index were recorded by tail-cuff plethysmography. Cardiac function was analyzed by the Langendorff technique and cardiomyocyte diameter was accessed by histologic analysis. Additionally, cardiac SERCA2 content and redox status were evaluated. KEY FINDINGS C-OVX rats exhibited reduced cardiac function and cardiac non-enzymatic total antioxidant capacity (TAC). R-Sham animals showed reduced SBP, DP, HR, improved cardiac function, reduced cardiac protein carbonyl derivatives and increased TAC, catalase, and superoxide dismutase activities. R-OVX rats maintained reduced SBP, DP, HR, and increased contractility and relaxation indexes. R-Sham and R-OVX rats exhibited preserved heart mass and reduced cardiomyocyte diameter. Cardiac SERCA2 content did not differ between the groups. SIGNIFICANCE Taken together, our findings show cardioprotective effects of SCR from birth in adult ovariectomized rats.
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Li W, Li D, Sun L, Li Z, Yu L, Wu S. The protective effects of estrogen on hepatic ischemia-reperfusion injury in rats by downregulating the Ang II/AT1R pathway. Biochem Biophys Res Commun 2018; 503:2543-2548. [DOI: 10.1016/j.bbrc.2018.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 07/04/2018] [Indexed: 12/27/2022]
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Chen BC, Weng YJ, Shibu MA, Han CK, Chen YS, Shen CY, Lin YM, Viswanadha VP, Liang HY, Huang CY. Estrogen and/or Estrogen Receptor α Inhibits BNIP3-Induced Apoptosis and Autophagy in H9c2 Cardiomyoblast Cells. Int J Mol Sci 2018; 19:ijms19051298. [PMID: 29701696 PMCID: PMC5983791 DOI: 10.3390/ijms19051298] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/15/2018] [Accepted: 04/23/2018] [Indexed: 02/06/2023] Open
Abstract
The process of autophagy in heart cells maintains homeostasis during cellular stress such as hypoxia by removing aggregated proteins and damaged organelles and thereby protects the heart during the times of starvation and ischemia. However, autophagy can lead to substantial cell death under certain circumstances. BCL2/adenovirus E1B 19 kDa protein-interacting protein 3 (BNIP3), a hypoxia-induced marker, has been shown to induce both autophagy and apoptosis. A BNIP3-docked organelle, e.g., mitochondria, also determines whether autophagy or apoptosis will take place. Estrogen (E2) and estrogen receptor (ER) alpha (ERα) have been shown to protect the heart against mitochondria-dependent apoptosis. The aim of the present study is to investigate the mechanisms by which ERα regulates BNIP3-induced apoptosis and autophagy, which is associated with hypoxic injury, in cardiomyoblast cells. An in vitro model to mimic hypoxic injury in the heart by engineering H9c2 cardiomyoblast cells to overexpress BNIP3 was established. Further, the effects of E2 and ERα in BNIP3-induced apoptosis and autophagy were determined in BNIP3 expressing H9c2 cells. Results from TUNEL assay and Immunoflourecense assay for LC3 puncta formation, respectively, revealed that ERα/E2 suppresses BNIP3-induced apoptosis and autophagy. The Western blot analysis showed ERα/E2 decreases the protein levels of caspase 3 (apoptotic marker), Atg5, and LC3-II (autophagic markers). Co-immunoprecipitation of BNIP3 and immunoblotting of Bcl-2 and Rheb showed that ERα reduced the interaction between BNIP3 and Bcl-2 or Rheb. The results confirm that ERα binds to BNIP3 causing a reduction in the levels of functional BNIP3 and thereby inhibits cellular apoptosis and autophagy. In addition, ERα attenuated the activity of the BNIP3 promoter by binding to SP-1 or NFκB sites.
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Affiliation(s)
- Bih-Cheng Chen
- School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung 404, Taiwan.
| | - Yi-Jiun Weng
- Graduate Institute of Basic Medical Science, China Medical University, Taichung 404, Taiwan.
| | - Marthandam Asokan Shibu
- Graduate Institute of Basic Medical Science, China Medical University, Taichung 404, Taiwan.
| | - Chien-Kuo Han
- Department of Health and Nutrition Biotechnology, Asia University, Taichung 404, Taiwan.
| | - Yueh-Sheng Chen
- School of Chinese Medicine, China Medical University, Taichung 413, Taiwan.
| | - Chia-Yao Shen
- Department of Nursing, MeiHo University, Pingtung 912, Taiwan.
| | - Yueh-Min Lin
- Department of Pathology, Changhua Christian Hospital, Changhua 500, Taiwan.
- Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing and Management College, Taipei 11260, Taiwan.
| | | | - Hsin-Yueh Liang
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung 404, Taiwan.
- Division of Cardiology, China Medical University Hospital, Taichung 404, Taiwan.
| | - Chih-Yang Huang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung 404, Taiwan.
- School of Chinese Medicine, China Medical University, Taichung 413, Taiwan.
- Department of Biological Science and Technology, Asia University, Taichung 404, Taiwan.
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Datta K, Basak T, Varshney S, Sengupta S, Sarkar S. Quantitative proteomic changes during post myocardial infarction remodeling reveals altered cardiac metabolism and Desmin aggregation in the infarct region. J Proteomics 2017; 152:283-299. [DOI: 10.1016/j.jprot.2016.11.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 11/11/2016] [Accepted: 11/23/2016] [Indexed: 12/14/2022]
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8
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Sivasinprasasn S, Shinlapawittayatorn K, Chattipakorn SC, Chattipakorn N. Estrogenic Impact on Cardiac Ischemic/Reperfusion Injury. J Cardiovasc Transl Res 2016; 9:23-39. [PMID: 26786980 DOI: 10.1007/s12265-016-9675-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 01/07/2016] [Indexed: 11/29/2022]
Abstract
The increase in cardiovascular disease and metabolic syndrome incidence following the onset of menopause has highlighted the role of estrogen as a cardiometabolic protective agent. Specifically regarding the heart, estrogen induced an improvement in cardiac function, preserved calcium homeostasis, and inhibited the mitochondrial apoptotic pathway. The beneficial effects of estrogen in relation to cardiac ischemia/reperfusion (I/R) injury, such as reduced infarction and ameliorated post-ischemic recovery, have also been shown. Nevertheless, controversial findings exist and estrogen therapy is reported to be related to a higher rate of thromboembolic events and atrial fibrillation in post-menopausal women. Therefore, greater clarification is needed to evaluate the exact potential of estrogen use in cases of cardiac I/R injury. This article reviews the effects of estrogen, in both acute and chronic treatment, and collates the studies with regard to their in vivo, in vitro, or clinical trial settings in cases of cardiac I/R injury and myocardial infarction.
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Affiliation(s)
- Sivaporn Sivasinprasasn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand.,Cardiac Electrophysiology unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,School of Medicine, Mae Fah Luang University, Chiang Rai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Krekwit Shinlapawittayatorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand.,Cardiac Electrophysiology unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Siriporn C Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand.,Department of Oral Biology and Diagnostic Science, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand
| | - Nipon Chattipakorn
- Cardiac Electrophysiology Research and Training Center, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand. .,Cardiac Electrophysiology unit, Department of Physiology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand. .,Center of Excellence in Cardiac Electrophysiology Research, Chiang Mai University, Chiang Mai, Thailand.
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Yao X, Wigginton JG, Maass DL, Ma L, Carlson D, Wolf SE, Minei JP, Zang QS. Estrogen-provided cardiac protection following burn trauma is mediated through a reduction in mitochondria-derived DAMPs. Am J Physiol Heart Circ Physiol 2014; 306:H882-94. [PMID: 24464748 DOI: 10.1152/ajpheart.00475.2013] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Mitochondria-derived danger-associated molecular patterns (DAMPs) play important roles in sterile inflammation after acute injuries. This study was designed to test the hypothesis that 17β-estradiol protects the heart via suppressing myocardial mitochondrial DAMPs after burn injury using an animal model. Sprague-Dawley rats were given a third-degree scald burn comprising 40% total body surface area (TBSA). 17β-Estradiol, 0.5 mg/kg, or control vehicle was administered subcutaneously 15 min following burn. The heart was harvested 24 h postburn. Estradiol showed significant inhibition on the productivity of H2O2 and oxidation of lipid molecules in the mitochondria. Estradiol increased mitochondrial antioxidant defense via enhancing the activities and expression of superoxide dismutase (SOD) and glutathione peroxidase (GPx). Estradiol also protected mitochondrial respiratory function and structural integrity. In parallel, estradiol remarkably decreased burn-induced release of mitochondrial cytochrome c and mitochondrial DNA (mtDNA) into cytoplasm. Further, estradiol inhibited myocardial apoptosis, shown by its suppression on DNA laddering and downregulation of caspase 1 and caspase 3. Estradiol's anti-inflammatory effect was demonstrated by reduction in systemic and cardiac cytokines (TNF-α, IL-1β, and IL-6), decrease in NF-κB activation, and attenuation of the expression of inflammasome component ASC in the heart of burned rats. Estradiol-provided cardiac protection was shown by reduction in myocardial injury marker troponin-I, amendment of heart morphology, and improvement of cardiac contractility after burn injury. Together, these data suggest that postburn administration of 17β-estradiol protects the heart via an effective control over the generation of mitochondrial DAMPs (mtROS, cytochrome c, and mtDNA) that incite cardiac apoptosis and inflammation.
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Affiliation(s)
- Xiao Yao
- Departments of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
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Weber H, Müller L, Jonas L, Schult C, Sparmann G, Schuff-Werner P. Calpain mediates caspase-dependent apoptosis initiated by hydrogen peroxide in pancreatic acinar AR42J cells. Free Radic Res 2013; 47:432-46. [PMID: 23495712 DOI: 10.3109/10715762.2013.785633] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Several studies have shown that oxidative stress induces apoptosis in many cellular systems including pancreatic acinar cells. However, the exact molecular mechanisms leading to apoptosis remain partially understood. This study aimed to investigate the role of the cytosolic cysteine protease calpain in H2O2-induced apoptosis in pancreatic AR42J cells. Apoptosis was evaluated using flow cytometric analysis of sub-G1 DNA populations, electron-microscopic analysis, caspase-3-specific αII-spectrin breakdown, and measuring the proteolytic activities of the initiator caspase-12 and caspase-8, and the executioner caspase-3. H2O2 induced an increase in the calpain proteolytic activity immediately after starting the experiments that tended to return to a nearly normal level after 8 h and could be attributed to m-calpain. Whereas no caspase-12, caspase-8 and caspase-3 activations could be detected within the first 0.5 h, significantly increased proteolytic activities were observed after 8 h compared with the control. At the same time, the cells showed first ultrastructural hallmarks of apoptosis and a decreased viability. In addition, αII-spectrin fragmentation was identified using immunoblotting that could be attributed to both calpain and caspase-3. Calpain inhibition reduced the activities of caspase-12, caspase-8, and caspase-3 leading to a decrease in the number of apoptotic cells. Immunoblotting analyses of caspase-12 and caspase-8 indicate that calpain may be involved in the activation process of both proteases. The results suggest that H2O2-induced apoptosis of AR42J cells requires activation of m-calpain initiating the endoplasmic reticulum stress-induced caspase-12 pathway and a caspase-8-dependent pathway. The findings also suggest that calpain may be involved in the execution phase of apoptosis.
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Affiliation(s)
- H Weber
- Institute of Clinical Chemistry and Laboratory Medicine, University of Rostock, Rostock, Germany.
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Wang Y, Hu H, Zhao M, Zhao J, Yin D, Sun X, Liu S, Gao Q, Yu L, Hao L. Nonylphenol disrupts the cardio-protective effects of 17β-estradiol on ischemia/reperfusion injury in isolated hearts of guinea pig. J Toxicol Sci 2013; 38:731-40. [DOI: 10.2131/jts.38.731] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Yan Wang
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
- Department of Pharmacy, Beihai People’s Hospital, China
| | - Huiyuan Hu
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Meimi Zhao
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Jinsheng Zhao
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Dandan Yin
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Xuefei Sun
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Shuyuan Liu
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Qinghua Gao
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
- Department of Physiology, School of Basic Medical Sciences, China Medical University, China
| | - Lifeng Yu
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
| | - Liying Hao
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, China
- Cardiovascular Institute of China Medical University, China
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Yang X, Qin L, Liu J, Tian L, Qian H. 17β-Estradiol protects the liver against cold ischemia/reperfusion injury through the Akt kinase pathway. J Surg Res 2012; 178:996-1002. [PMID: 22835949 DOI: 10.1016/j.jss.2012.07.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 06/22/2012] [Accepted: 07/03/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND Hepatic ischemia-reperfusion (IR) injury occurs during liver resection and transplantation. Recent studies have shown that 17β-estradiol (E2) can protect the heart and liver against warm IR. The present study focused on the cytoprotective effects of E2 on cold IR injury to the liver. MATERIALS AND METHODS Sprague-Dawley male rats were randomly divided into three groups: sham, IR, and IR plus E2. The model of rat orthotopic liver transplantation was used. The rats in the IR plus E2 group were intraperitoneally injected with E2 (100 μg/kg/d) for 7 d before surgery. The sham and IR group received the same quantity of saline. The donor livers were then orthotopically transplanted into rats after cold ischemia preservation for 4 h at 4°C lactated Ringer's solution. After 6 h reperfusion, liver function, bile flow volume, hepatocyte apoptosis, and activation of Akt, glycogen synthase kinase-3β, and Bcl-2-associated death promoter were assessed. The survival rate of the rats was also investigated. RESULTS The administration of E2 significantly prolonged the survival of liver grafts by improving liver function and decreasing hepatocyte apoptosis. Rats undergoing E2 demonstrated a greater level activation of Akt in the liver compared with the IR group. In addition, E2 also inhibited the activities of glycogen synthase kinase-3β, Bcl-2-associated death promoter, and caspase-3-induced by IR injury. CONCLUSIONS E2 pretreatment attenuated the hepatocellular damage caused by hepatic cold IR injury through the Akt pathway. Estrogen therapy might be important in clinical settings associated with cold IR injury during liver transplantation.
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Affiliation(s)
- Xiaohua Yang
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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Müller AL, Hryshko LV, Dhalla NS. Extracellular and intracellular proteases in cardiac dysfunction due to ischemia-reperfusion injury. Int J Cardiol 2012; 164:39-47. [PMID: 22357424 DOI: 10.1016/j.ijcard.2012.01.103] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 10/19/2011] [Accepted: 01/28/2012] [Indexed: 12/20/2022]
Abstract
Various procedures such as angioplasty, thrombolytic therapy, coronary bypass surgery, and cardiac transplantation are invariably associated with ischemia-reperfusion (I/R) injury. Impaired recovery of cardiac function due to I/R injury is considered to be a consequence of the occurrence of both oxidative stress and intracellular Ca(2+)-overload in the myocardium. These changes in the ischemic myocardium appear to activate both extracellular and intracellular proteases which are responsible for the cleavage of extracellular matrix and subcellular structures involved in the maintenance of cardiac function. It is thus intended to discuss the actions of I/R injury on several proteases, with a focus on calpain, matrix metalloproteinases, and cathepsins as well as their role in inducing alterations both inside and outside the cardiomyocytes. In addition, modifications of subcellular organelles such as myofibrils, sarcoplasmic reticulum and sarcolemma as well as extracellular matrix, and the potential regulatory effects of endogenous inhibitors on protease activities are identified. Both extracellular and intracellular proteolytic activities appear to be imperative in determining the true extent of I/R injury and their inhibition seems to be of critical importance for improving the recovery of cardiac function. Thus, both extracellular and intracellular proteases may serve as potential targets for the development of cardioprotective interventions for reducing damage to the heart and retarding the development of contractile dysfunction caused by I/R injury.
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Affiliation(s)
- Alison L Müller
- Institute of Cardiovascular Sciences, St Boniface Hospital Research Centre, and Department of Physiology, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
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Rationale for routine and immediate administration of intravenous estrogen for all critically ill and injured patients. Crit Care Med 2010; 38:S620-9. [DOI: 10.1097/ccm.0b013e3181f243a9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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Liou CM, Yang AL, Kuo CH, Tin H, Huang CY, Lee SD. Effects of 17beta-estradiol on cardiac apoptosis in ovariectomized rats. Cell Biochem Funct 2010; 28:521-8. [DOI: 10.1002/cbf.1687] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Inserte J, Barba I, Hernando V, Garcia-Dorado D. Delayed recovery of intracellular acidosis during reperfusion prevents calpain activation and determines protection in postconditioned myocardium. Cardiovasc Res 2008; 81:116-22. [DOI: 10.1093/cvr/cvn260] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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