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Ozkara G, Aslan EI, Malikova F, Aydogan C, Ser OS, Kilicarslan O, Dalgic SN, Yildiz A, Ozturk O, Yilmaz-Aydogan H. Endothelin-converting Enzyme-1b Genetic Variants Increase the Risk of Coronary Artery Ectasia. Biochem Genet 2024:10.1007/s10528-024-10810-9. [PMID: 38625594 DOI: 10.1007/s10528-024-10810-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 04/09/2024] [Indexed: 04/17/2024]
Abstract
Coronary artery ectasia (CAE), defined as a 1.5-fold or greater enlargement of a coronary artery segment compared to the adjacent normal coronary artery, is frequently associated with atherosclerotic coronary artery disease (CAD). Membrane-bound endothelin converting enzyme-1 (ECE-1) is involved in the maturation process of the most potent vasoconstrictor ET-1. Polymorphisms in the endothelin (ET) gene family have been shown associated with the development of atherosclerosis. This study aims to investigate the effects of rs213045 and rs2038089 polymorphisms in the ECE-1 gene which have been previously shown to be associated with atherosclerosis and hypertension (HT), in CAE patients. Ninety-six CAE and 175 patients with normal coronary arteries were included in the study. ECE-1b gene variations rs213045 and rs2038089 were determined by real-time PCR. The frequencies of rs213045 C > A (C338A) CC genotype (60.4% vs. 35.4%, p < 0.001) and rs2038089 T > C T allele (64.58% vs. 35.42%, p = 0.017) were higher in the CAE group compared to the control group. The multivariate regression analysis showed that the ECE-1b rs213045 CC genotype (p = 0.001), rs2038089 T allele (p = 0.017), and hypercholesterolemia (HC) (p = 0.001) are risk factors for CAE. Moreover, in nondiabetic individuals of the CAE and control groups, it was observed that the rs213045 CC genotype (p < 0.001), and rs2038089 T allele (p = 0.003) were a risk factor for CAE, but this relationship was not found in the diabetic subgroups of the study groups (p > 0.05). These results show that ECE-1b polymorphisms may be associated with the risk of CAE and this relationship may change according to the presence of type II diabetes.
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Affiliation(s)
- Gulcin Ozkara
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.
- Department of Medical Biology, Bezmialem Vakif University, Faculty of Medicine, Topkapi Mahallesi, Adnan Menderes Vatan Bulvari, No:113, Istanbul, Turkey.
| | - Ezgi Irmak Aslan
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
- Department of Medical Biochemistry, Istanbul Nisantasi University, Faculty of Medicine, Istanbul, Turkey
| | - Fidan Malikova
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Cagatay Aydogan
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Ozgur Selim Ser
- Department of Cardiology, Institute of Cardiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Onur Kilicarslan
- Department of Cardiology, Institute of Cardiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sadiye Nur Dalgic
- Department of Cardiology, Institute of Cardiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ahmet Yildiz
- Department of Cardiology, Institute of Cardiology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Oguz Ozturk
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Hulya Yilmaz-Aydogan
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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2
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Chen N, Xu L, Bi Z, Wu J. Hypoxia-inducible factor-1α contributes to the proliferation of cholesteatoma keratinocytes through regulating endothelin converting enzyme 1 expression. Laryngoscope Investig Otolaryngol 2024; 9:e1233. [PMID: 38525120 PMCID: PMC10960243 DOI: 10.1002/lio2.1233] [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: 10/15/2023] [Revised: 01/11/2024] [Accepted: 02/25/2024] [Indexed: 03/26/2024] Open
Abstract
Objective Cholesteatoma is a hyperproliferative, pseudoneoplastic lesion of the middle ear characterized by aggressive growth and bone destruction. Hypoxia-inducible factor-1α (HIF-1α, also known as HIF1A) is a key transcription factor that enters the nucleus and upregulates many genes involved in cancer progression in the oxygen-free environment. This study is designed to explore the role and mechanism of HIF1A in the progression of cholesteatoma. Methods HIF1A and endothelin converting enzyme 1 (ECE1) levels were determined using real-time quantitative polymerase chain reaction. The protein levels of HIF1A, Cyclin D1, proliferating cell nuclear antigen, and ECE1 were measured using western blot. Cell viability, proliferation, and cell cycle progression were analyzed using cell counting kit-8, Colony formation, 5-ethynyl-2'-deoxyuridine, and flow cytometry assays. Binding between HIF-1α and ECE1 promoter was predicted by Jaspar and verified using Chromatin immunoprecipitation and dual-luciferase reporter assays. Results HIF1A and ECE1 were highly expressed in cholesteatoma patients and keratinocytes. Moreover, HIF1A knockdown might suppress the cell viability, proliferation, and cycle progression of cholesteatoma keratinocytes. Furthermore, HIF1A upregulated the transcription of ECE1 through binding to its promoter region. Conclusion HIF1A might expedite cholesteatoma keratinocyte proliferation partly by increasing ECE1 expression, providing a possible therapeutic target for the cholesteatoma treatment.
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Affiliation(s)
- Nie Chen
- Department of OtolaryngologyChangzhou No. 2 People's Hospital affiliated to Nanjing Medical UniversityChangzhouChina
| | - Lei Xu
- Department of OtolaryngologyChangzhou No. 2 People's Hospital affiliated to Nanjing Medical UniversityChangzhouChina
| | - Zhi Bi
- Department of OtolaryngologyChangzhou No. 2 People's Hospital affiliated to Nanjing Medical UniversityChangzhouChina
| | - Jian Wu
- Department of OtolaryngologyChangzhou No. 2 People's Hospital affiliated to Nanjing Medical UniversityChangzhouChina
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3
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Feng D, Xiang X, Guan Y, Guillot A, Lu H, Chang C, He Y, Wang H, Pan H, Ju C, Colgan SP, Tacke F, Wang XW, Kunos G, Gao B. Monocyte-derived macrophages orchestrate multiple cell-type interactions to repair necrotic liver lesions in disease models. J Clin Invest 2023; 133:e166954. [PMID: 37338984 PMCID: PMC10378165 DOI: 10.1172/jci166954] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 06/15/2023] [Indexed: 06/22/2023] Open
Abstract
The liver can fully regenerate after partial resection, and its underlying mechanisms have been extensively studied. The liver can also rapidly regenerate after injury, with most studies focusing on hepatocyte proliferation; however, how hepatic necrotic lesions during acute or chronic liver diseases are eliminated and repaired remains obscure. Here, we demonstrate that monocyte-derived macrophages (MoMFs) were rapidly recruited to and encapsulated necrotic areas during immune-mediated liver injury and that this feature was essential in repairing necrotic lesions. At the early stage of injury, infiltrating MoMFs activated the Jagged1/notch homolog protein 2 (JAG1/NOTCH2) axis to induce cell death-resistant SRY-box transcription factor 9+ (SOX9+) hepatocytes near the necrotic lesions, which acted as a barrier from further injury. Subsequently, necrotic environment (hypoxia and dead cells) induced a cluster of complement 1q-positive (C1q+) MoMFs that promoted necrotic removal and liver repair, while Pdgfb+ MoMFs activated hepatic stellate cells (HSCs) to express α-smooth muscle actin and induce a strong contraction signal (YAP, pMLC) to squeeze and finally eliminate the necrotic lesions. In conclusion, MoMFs play a key role in repairing the necrotic lesions, not only by removing necrotic tissues, but also by inducing cell death-resistant hepatocytes to form a perinecrotic capsule and by activating α-smooth muscle actin-expressing HSCs to facilitate necrotic lesion resolution.
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Affiliation(s)
- Dechun Feng
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Xiaogang Xiang
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Yukun Guan
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Adrien Guillot
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Hongkun Lu
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Chingwen Chang
- Laboratory of Human Carcinogenesis and
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Yong He
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Hua Wang
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Hongna Pan
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
| | - Cynthia Ju
- Department of Anesthesiology, Critical Care and Pain Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, USA
| | - Sean P. Colgan
- Department of Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Frank Tacke
- Department of Hepatology and Gastroenterology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Xin Wei Wang
- Laboratory of Human Carcinogenesis and
- Liver Cancer Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - George Kunos
- Laboratory of Physiologic Studies, NIAAA, NIH, Bethesda, Maryland, USA
| | - Bin Gao
- Laboratory of Liver Diseases, National Institute on Alcohol Abuse and Alcoholism (NIAAA), NIH, Bethesda, Maryland, USA
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Brandt F, Ullrich M, Wodtke J, Kopka K, Bachmann M, Löser R, Pietzsch J, Pietzsch HJ, Wodtke R. Enzymological Characterization of 64Cu-Labeled Neprilysin Substrates and Their Application for Modulating the Renal Clearance of Targeted Radiopharmaceuticals. J Med Chem 2023; 66:516-537. [PMID: 36595224 DOI: 10.1021/acs.jmedchem.2c01472] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The applicability of radioligands for targeted endoradionuclide therapy is limited due to radiation-induced toxicity to healthy tissues, in particular to the kidneys as primary organs of elimination. The targeting of enzymes of the renal brush border membrane by cleavable linkers that permit the formation of fast eliminating radionuclide-carrying cleavage fragments gains increasing interest. Herein, we synthesized a small library of 64Cu-labeled cleavable linkers and quantified their substrate potentials toward neprilysin (NEP), a highly abundant peptidase at the renal brush border membrane. This allowed for the derivation of structure-activity relationships, and selected cleavable linkers were attached to the somatostatin receptor subtype 2 ligand [Tyr3]octreotate. Radiopharmacological characterization revealed that a substrate-based targeting of NEP in the kidneys with small peptides entails their premature cleavage in the blood circulation by soluble and endothelium-derived NEP. However, for a kidney-specific targeting of NEP, the additional targeting of albumin in the blood is highlighted.
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Affiliation(s)
- Florian Brandt
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany.,Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstraße 4, 01069Dresden, Germany
| | - Martin Ullrich
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany
| | - Johanna Wodtke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany
| | - Klaus Kopka
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany.,Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstraße 4, 01069Dresden, Germany.,National Center for Tumor Diseases (NCT) Dresden, University Hospital Carl Gustav Carus, Fetscherstraße 74, 01307Dresden, Germany.,German Cancer Consortium (DKTK), Partner Site Dresden, Fetscherstraße 74, 01307Dresden, Germany
| | - Michael Bachmann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany.,National Center for Tumor Diseases (NCT) Dresden, University Hospital Carl Gustav Carus, Fetscherstraße 74, 01307Dresden, Germany
| | - Reik Löser
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany.,Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstraße 4, 01069Dresden, Germany
| | - Jens Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany.,Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstraße 4, 01069Dresden, Germany
| | - Hans-Jürgen Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany.,Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstraße 4, 01069Dresden, Germany
| | - Robert Wodtke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Bautzner Landstraße 400, 01328Dresden, Germany
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ERN1 knockdown modifies the impact of glucose and glutamine deprivations on the expression of EDN1 and its receptors in glioma cells. Endocr Regul 2021; 55:72-82. [PMID: 34020533 DOI: 10.2478/enr-2021-0009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Objective. The aim of the present investigation was to study the impact of glucose and gluta-mine deprivations on the expression of genes encoding EDN1 (endothelin-1), its cognate receptors (EDNRA and EDNRB), and ECE1 (endothelin converting enzyme 1) in U87 glioma cells in response to knockdown of ERN1 (endoplasmic reticulum to nucleus signaling 1), a major signaling pathway of endoplasmic reticulum stress, for evaluation of their possible implication in the control of glioma growth through ERN1 and nutrient limitations. Methods. The expression level of EDN1, its receptors and converting enzyme 1 in control U87 glioma cells and cells with knockdown of ERN1 treated by glucose or glutamine deprivation by quantitative polymerase chain reaction was studied. Results. We showed that the expression level of EDN1 and ECE1 genes was significantly up-regulated in control U87 glioma cells exposure under glucose deprivation condition in comparison with the glioma cells, growing in regular glucose containing medium. We also observed up-regulation of ECE1 gene expression in U87 glioma cells exposure under glutamine deprivation as well as down-regulation of the expression of EDN1 and EDNRA mRNA, being more significant for EDN1. Furthermore, the knockdown of ERN1 signaling enzyme function significantly modified the response of most studied gene expressions to glucose and glutamine deprivation conditions. Thus, the ERN1 knockdown led to a strong suppression of EDN1 gene expression under glucose deprivation, but did not change the effect of glutamine deprivation on its expression. At the same time, the knockdown of ERN1 signaling introduced the sensitivity of EDNRB gene to both glucose and glutamine deprivations as well as completely removed the impact of glucose deprivation on the expression of ECE1 gene. Conclusions. The results of this study demonstrated that the expression of endothelin-1, its receptors, and ECE1 genes is preferentially sensitive to glucose and glutamine deprivations in gene specific manner and that knockdown of ERN1 significantly modified the expression of EDN1, EDNRB, and ECE1 genes in U87 glioma cells. It is possible that the observed changes in the expression of studied genes under nutrient deprivation may contribute to the suppressive effect of ERN1 knockdown on glioma cell proliferation and invasiveness.
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Identification of Hypoxia-Specific Biomarkers in Salmonids Using RNA-Sequencing and Validation Using High-Throughput qPCR. G3-GENES GENOMES GENETICS 2020; 10:3321-3336. [PMID: 32694198 PMCID: PMC7466982 DOI: 10.1534/g3.120.401487] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Identifying early gene expression responses to hypoxia (i.e., low dissolved oxygen) as a tool to assess the degree of exposure to this stressor is crucial for salmonids, because they are increasingly exposed to hypoxic stress due to anthropogenic habitat change, e.g., global warming, excessive nutrient loading, and persistent algal blooms. Our goal was to discover and validate gill gene expression biomarkers specific to the hypoxia response in salmonids across multi-stressor conditions. Gill tissue was collected from 24 freshwater juvenile Chinook salmon (Oncorhynchus tshawytscha), held in normoxia [dissolved oxygen (DO) > 8 mg L-1] and hypoxia (DO = 4‒5 mg L-1) in 10 and 18° temperatures for up to six days. RNA-sequencing (RNA-seq) was then used to discover 240 differentially expressed genes between hypoxic and normoxic conditions, but not affected by temperature. The most significantly differentially expressed genes had functional roles in the cell cycle and suppression of cell proliferation associated with hypoxic conditions. The most significant genes (n = 30) were selected for real-time qPCR assay development. These assays demonstrated a strong correlation (r = 0.88; P < 0.001) between the expression values from RNA-seq and the fold changes from qPCR. Further, qPCR of the 30 candidate hypoxia biomarkers was applied to an additional 322 Chinook salmon exposed to hypoxic and normoxic conditions to reveal the top biomarkers to define hypoxic stress. Multivariate analyses revealed that smolt stage, water salinity, and morbidity status were relevant factors to consider with the expression of these genes in relation to hypoxic stress. These hypoxia candidate genes will be put into application screening Chinook salmon to determine the identity of stressors impacting the fish.
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Heyman SN, Khamaisi M, Zorbavel D, Rosen S, Abassi Z. Role of Hypoxia in Renal Failure Caused by Nephrotoxins and Hypertonic Solutions. Semin Nephrol 2020; 39:530-542. [PMID: 31836036 DOI: 10.1016/j.semnephrol.2019.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hypoxia plays a role in the pathogenesis of acute kidney injury under diverse clinical settings, including nephrotoxicity. Although some nephrotoxins exert direct renal parenchymal injury, likely with consequent altered oxygenation, others primarily reduce renal parenchymal oxygenation, leading to hypoxic tubular damage. As outlined in this review, nephrotoxin-related renal hypoxia may result from an altered renal oxygen supply (cyclosporine), enhanced oxygen consumption for tubular transport (agents inducing osmotic diuresis), or their combination (nonsteroidal anti-inflammatory drugs, radiocontrast agents, and others). Most agents causing hypoxic renal injury further supress physiologic low medullary Po2, in which a limited regional blood supply barely matches the intense regional tubular transport and oxygen consumption. The medullary tubular transport and blood supply are finely matched, securing oxygen sufficiency. Predisposition to hypoxia-mediated nephrotoxicity by medical conditions, such as chronic kidney disease or diabetes, may be explained by malfunctioning of control systems that normally maintain medullary oxygenation. However, this propensity may be diminished by hypoxia-mediated adaptive responses governed by hypoxia-inducible factors. Recent reports have suggested that inhibitors of sodium-glucose cotransporters and the administration of hypertonic saline may be added to the growing list of common therapeutic interventions that intensify medullary hypoxia, and potentially could lead to hypoxic acute kidney injury.
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Affiliation(s)
- Samuel N Heyman
- Department of Medicine, Hadassah Hebrew University Hospital, Mt. Scopus, Jerusalem, Israel.
| | - Mogher Khamaisi
- Department of Medicine D, Rambam Health Care Campus, Haifa, Israel; Institute of Endocrinology, Diabetes and Metabolism, Rambam Health Care Campus, Haifa, Israel
| | - Danny Zorbavel
- Department of Medicine D, Rambam Health Care Campus, Haifa, Israel
| | - Seymour Rosen
- Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA; Department of Pathology, Harvard Medical School, Boston, MA
| | - Zaid Abassi
- Department of Physiology, Ruth and Bruce Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel; Department of Laboratory Medicine, Rambam Health Care Campus, Haifa, Israel
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Hypoxic regulation of EDN1, EDNRA, EDNRB, and ECE1 gene expressions in ERN1 knockdown U87 glioma cells. Endocr Regul 2019; 53:250-262. [DOI: 10.2478/enr-2019-0025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Abstract
Objective. The aim of the present investigation was to study the effect of hypoxia on the expression of genes encoding endothelin-1 (EDN1) and its cognate receptors (EDNRA and EDNRB) as well as endothelin converting enzyme 1 (ECE1) in U87 glioma cells in response to inhibition of endoplasmic reticulum stress signaling mediated by ERN1/IRE1 (endoplasmic reticulum to nucleus signaling 1) for evaluation of their possible significance in the control of glioma growth through ERN1 and hypoxia.
Methods. The expression level of EDN1, EDNRA, EDNRB, and ECE1 genes as well as micro-RNA miR-19, miR-96, and miR-206 was studied in control and ERN1 knockdown U87 glioma cells under hypoxia by quantitative polymerase chain reaction.
Results. It was shown that the expression level of EDN1, EDNRA, EDNRB, and ECE1 genes was up-regulated in ERN1 knockdown glioma cells in comparison with the control glioma cells, being more significant for endothelin-1. We also observed down-regulation of microRNA miR-206, miR-96, and miR-19a, which have specific binding sites in mRNA EDN1, EDNRA, and EDNRB, correspondingly, and can participate in posttranscriptional regulation of these mRNA expressions. Furthermore, inhibition of ERN1 endoribonuclease lead to up-regulation of EDNRA and ECE1 gene expressions and down-regulation of the expression level of EDN1 and EDNRB genes in glioma cells. Thus, the expression of EDNRA and ECE1 genes is regulated by ERN1 endoribonuclease, but EDN1 and EDNRB genes preferentially by ERN1 protein kinase. We have also shown that hypoxia enhanced the expression of EDN1, EDNRA, and ECE1 genes and that knockdown of ERN1 signaling enzyme function significantly modified the response of all studied gene expressions to hypoxia. Thus, effect of hypoxia on the expression level of EDN1 and ECE1 genes was significantly or completely reduced in ERN1 knockdown glioma cells since the expression of EDNRA gene was down-regulated under hypoxia. Moreover, hypoxia is induced the expression of EDNRB gene in ERN1 knockdown glioma cells.
Conclusions. Results of this investigation demonstrate that ERN1 knockdown significantly increased the expression of endothelin-1 and its receptors as well as ECE1 genes by different mechanisms and that all studied gene expressions were sensitive to hypoxia. It is possible that hypoxic regulation of the expression of these genes is a result of complex interaction of variable ERN1 related transcription and regulatory factors with HIF1A and possibly contributed to the control of glioma growth.
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Alruwaili N, Kandhi S, Sun D, Wolin MS. Metabolism and Redox in Pulmonary Vascular Physiology and Pathophysiology. Antioxid Redox Signal 2019; 31:752-769. [PMID: 30403147 PMCID: PMC6708269 DOI: 10.1089/ars.2018.7657] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Significance: This review considers how some systems controlling pulmonary vascular function are potentially regulated by redox processes to examine how and why conditions such as prolonged hypoxia, pathological mediators, and other factors promoting vascular remodeling contribute to the development of pulmonary hypertension (PH). Recent Advances and Critical Issues: Aspects of vascular remodeling induction mechanisms described are associated with shifts in glucose metabolism through the pentose phosphate pathway and increased cytosolic NADPH generation by glucose-6-phosphate dehydrogenase, increased glycolysis generation of cytosolic NADH and lactate, mitochondrial dysfunction associated with superoxide dismutase-2 depletion, changes in reactive oxygen species and iron metabolism, and redox signaling. Future Directions: The regulation and impact of hypoxia-inducible factor and the function of cGMP-dependent and redox regulation of protein kinase G are considered for their potential roles as key sensors and coordinators of redox and metabolic processes controlling the progression of vascular pathophysiology in PH, and how modulating aspects of metabolic and redox regulatory systems potentially function in beneficial therapeutic approaches.
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Affiliation(s)
- Norah Alruwaili
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Sharath Kandhi
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Dong Sun
- Department of Physiology, New York Medical College, Valhalla, New York
| | - Michael S Wolin
- Department of Physiology, New York Medical College, Valhalla, New York
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Bao N, Fang B, Lv H, Jiang Y, Chen F, Wang Z, Ma H. Upregulation of miR-199a-5p Protects Spinal Cord Against Ischemia/Reperfusion-Induced Injury via Downregulation of ECE1 in Rat. Cell Mol Neurobiol 2018; 38:1293-1303. [DOI: 10.1007/s10571-018-0597-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 05/31/2018] [Indexed: 12/18/2022]
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Heyman SN, Khamaisi M, Abassi Z. Interacting hypoxia and endothelin in the diabetic kidney: therapeutic options. Am J Physiol Renal Physiol 2018; 314:F699-F701. [DOI: 10.1152/ajprenal.00598.2017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Samuel N. Heyman
- Department of Medicine, Hadassah Hebrew University Hospital, Mt. Scopus, Jerusalem, Israel
| | - Mogher Khamaisi
- Department of Medicine D, Rambam Health Campus and The Bruce and Ruth Rapapport Faculty of Medicine, Technion, Haifa, Israel
| | - Zaid Abassi
- Department of Physiology, The Bruce and Ruth Rapapport Faculty of Medicine, Technion, Haifa, Israel
- Department of Laboratory Medicine, Rambam Health Campus, Haifa, Israel
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12
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Heyman SN, Abassi Z, Rosenberger C, Yaseen H, Skarjinski G, Shina A, Mathia S, Krits N, Khamaisi M. Cyclosporine A induces endothelin-converting enzyme-1: Studies in vivo and in vitro. Acta Physiol (Oxf) 2018; 223:e13033. [PMID: 29330945 DOI: 10.1111/apha.13033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 01/04/2018] [Accepted: 01/08/2018] [Indexed: 11/27/2022]
Abstract
AIM Cyclosporine A (CsA) induces renal vasoconstriction and hypoxia and enhances the expression of endothelin-1 (ET-1) pro-hormone (pre-pro-ET-1), plausibly leading to a feed-forward loop of renal vasoconstriction, hypoxia and enhanced synthesis of the potent vasoconstrictor ET-1. Endothelin-converting enzyme (ECE)-1 cleaves big endothelin to generate endothelin (ET)-1 and is upregulated by hypoxia via hypoxia-inducible factor (HIF). We hypothesized that in addition to the direct induction of ET-1 synthesis, CsA might also intensify renal ECE-1 expression, thus contributing to enhanced ET-1 synthesis following CsA. METHODS CsA was administered to Sprague Dawley rats (120 mg/kg/SC) for 4 days, and renal HIF and ECE-1 expression were assessed with Western blots and immunostaining. Human umbilical vein endothelial cells (HUVEC) and proximal tubular cell line (HK-2) were subjected to CsA, and ECE-1 induction was evaluated using real-time mRNA PCR and Western blots. RESULTS Cyclosporine A intensified renal parenchymal ECE-1 expression in the rat kidney, particularly in distal nephron segments, along with renal hypoxia (detected by pimonidazole adducts) and HIF expression, in line with our recent observations showing episodic hypoxia in mice subjected to CsA. Furthermore, in cultured normoxic HUVEC and HK-2 cells, CsA dose-dependently induced both pre-pro-ET-1 and ECE-1 mRNA and protein expression, with enhanced ET-1 generation. CONCLUSION CsA induces ECE-1 via both hypoxic and non-hypoxic pathways. ECE-1 may contribute to increased renal ET-1 generation following CsA, participating in a feed-forward loop of renal parenchymal hypoxia and ET synthesis.
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Affiliation(s)
- S. N. Heyman
- Department of Medicine; Hadassah Hebrew University Hospital; Jerusalem Israel
| | - Z. Abassi
- Department of Physiology, Ruth and Bruce Rappaport Faculty of Medicine; Technion-IIT; Haifa Israel
- Department of Laboratory Medicine; Rambam Health Care Campus; Haifa Israel
| | - C. Rosenberger
- Department of Nephrology and Medical Intensive Care; Charité - Universitätsmedizin; Berlin Germany
| | - H. Yaseen
- Department of Medicine D; Rambam Health Care Campus; Haifa Israel
- Ruth and Bruce Rappaport Faculty of Medicine; Technion-IIT; Haifa Israel
| | - G. Skarjinski
- Department of Medicine; Hadassah Hebrew University Hospital; Jerusalem Israel
| | - A. Shina
- Department of Medicine; Hadassah Hebrew University Hospital; Jerusalem Israel
| | - S. Mathia
- Department of Nephrology and Medical Intensive Care; Charité - Universitätsmedizin; Berlin Germany
| | - N. Krits
- Department of Medicine D; Rambam Health Care Campus; Haifa Israel
- Ruth and Bruce Rappaport Faculty of Medicine; Technion-IIT; Haifa Israel
| | - M. Khamaisi
- Department of Medicine D; Rambam Health Care Campus; Haifa Israel
- Ruth and Bruce Rappaport Faculty of Medicine; Technion-IIT; Haifa Israel
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13
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Gorelik Y, Darawshi S, Yaseen H, Abassi Z, Heyman SN, Khamaisi M. Acute Renal Failure Following Near-Drowning. Kidney Int Rep 2018; 3:833-840. [PMID: 29989059 PMCID: PMC6035158 DOI: 10.1016/j.ekir.2018.02.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/22/2018] [Accepted: 02/18/2018] [Indexed: 01/23/2023] Open
Abstract
Introduction Acute kidney injury associated with near-drowning (ND-AKI) has rarely been reported and its incidence among survivors is unknown. A patient with AKI and urine biomarkers indicating tubular injury led us to assess the occurrence and clinical characteristics of ND-AKI and to evaluate possible causative mechanisms. Methods We evaluated medical records of patients rescued from near-drowning in the Mediterranean Sea and treated in a tertiary-level medical center during 2000 to 2017. Results Ninety-five patients with the diagnosis of near-drowning in seawater were treated. Forty-two of these patients (43%) developed ND-AKI and 17 (18%) were classified as AKI Kidney Disease: Improving Global Outcomes stages 2 to 3. ND-AKI was associated with the need for resuscitation and mechanical ventilation, with the calculated seawater volume ingestion (extrapolated from rising plasma sodium) and with the degree of acidemia, lactemia, and ventilatory failure. This series and 28 additional published cases of ND-AKI in the literature showed an overall male predisposition. Conclusion AKI is a common complication of near-drowning and is associated with increased in-hospital mortality. Data analysis suggests a predominant role of hypoxic tubular injury due to systemic hypoxemia in ND-AKI, combined with intense sympathetic activity (reflected by tachyarrhythmias, hyperglycemia, and relative hypokalemia) and increased oxygen expenditure for intensified distal tubular sodium transport. Androgen-related reduced renal vasodilatory capacity may explain male gender predominance.
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Affiliation(s)
- Yuri Gorelik
- Internal Medicine, Rambam Health Care Campus, Haifa, Israel
| | - Said Darawshi
- Internal Medicine, Rambam Health Care Campus, Haifa, Israel
| | - Hiba Yaseen
- Institute of Endocrinology, Diabetes and Metabolism, Rambam Health Care Campus, Haifa, Israel
| | - Zaid Abassi
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Institute of Technology, Haifa, Israel
| | - Samuel N Heyman
- Departments of Medicine, Hadassah Hebrew University Hospitals, Jerusalem, Israel
| | - Mogher Khamaisi
- Internal Medicine, Rambam Health Care Campus, Haifa, Israel.,Institute of Endocrinology, Diabetes and Metabolism, Rambam Health Care Campus, Haifa, Israel.,The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Institute of Technology, Haifa, Israel
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14
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Pheochromocytoma and paraganglioma: genotype versus anatomic location as determinants of tumor phenotype. Cell Tissue Res 2018; 372:347-365. [DOI: 10.1007/s00441-017-2760-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 12/01/2017] [Indexed: 12/22/2022]
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15
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Gozal D, Gileles-Hillel A, Cortese R, Li Y, Almendros I, Qiao Z, Khalyfa AA, Andrade J, Khalyfa A. Visceral White Adipose Tissue after Chronic Intermittent and Sustained Hypoxia in Mice. Am J Respir Cell Mol Biol 2017; 56:477-487. [PMID: 28107636 DOI: 10.1165/rcmb.2016-0243oc] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Angiogenesis, a process induced by hypoxia in visceral white adipose tissues (vWAT) in the context of obesity, mediates obesity-induced metabolic dysfunction and insulin resistance. Chronic intermittent hypoxia (IH) and sustained hypoxia (SH) induce body weight reductions and insulin resistance of different magnitudes, suggesting different hypoxia inducible factor (HIF)-1α-related activity. Eight-week-old male C57BL/6J mice (n = 10-12/group) were exposed to either IH, SH, or room air (RA). vWAT were analyzed for insulin sensitivity (phosphorylated (pAKT)/AKT), HIF-1α transcription using chromatin immunoprecipitation (ChIP)-sequencing, angiogenesis using immunohistochemistry, and gene expression of different fat cell markers and HIF-1α gene targets using quantitative polymerase chain reaction or microarrays. Body and vWAT weights were reduced in hypoxia (SH > IH > RA; P < 0.001), with vWAT in IH manifesting vascular rarefaction and increased proinflammatory macrophages. HIF-1α ChIP-sequencing showed markedly increased binding sites in SH-exposed vWAT both at 6 hours and at 6 weeks compared with IH, the latter also showing decreased vascular endothelial growth factor, endothelial nitric oxide synthase, P2RX5, and PAT2 expression, and insulin resistance (IH > > > SH = RA; P < 0.001). IH induces preferential whitening of vWAT, as opposed to prominent browning in SH. Unlike SH, IH elicits early HIF-1α activity that is unsustained over time and is accompanied by concurrent vascular rarefaction, inflammation, and insulin resistance. Thus, the dichotomous changes in HIF-1α transcriptional activity and brown/beige/white fat balance in IH and SH should enable exploration of mechanisms by which altered sympathetic outflow, such as that which occurs in apneic patients, results in whitening, rather than the anticipated browning of adipose tissues that occurs in SH.
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Affiliation(s)
- David Gozal
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and
| | - Alex Gileles-Hillel
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and
| | - Rene Cortese
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and
| | - Yan Li
- 2 Center for Research Informatics, Biological Sciences Division, The University of Chicago, Chicago, Illinois
| | - Isaac Almendros
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and.,3 Unitat de Biofísica i Bioenginyeria, Facultat de Medicina, Universitat de Barcelona-IDIBAPS, Barcelona, Spain; and.,4 CIBER de Enfermedades Respiratorias, Barcelona, Spain
| | - Zhuanhong Qiao
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and
| | - Ahamed A Khalyfa
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and
| | - Jorge Andrade
- 2 Center for Research Informatics, Biological Sciences Division, The University of Chicago, Chicago, Illinois
| | - Abdelnaby Khalyfa
- 1 Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, and
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16
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Kurihara O, Seino Y, Shibata Y, Matsushita M, Komiyama H, Kato K, Murakami D, Munakata R, Takano M, Miyauchi Y, Hata N, Shimizu W. Blunted renal vasoconstriction in patients with subclinical contrast-induced renal injury. Clin Exp Pharmacol Physiol 2016; 43:1148-1150. [PMID: 27558080 DOI: 10.1111/1440-1681.12653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 08/04/2016] [Accepted: 08/08/2016] [Indexed: 11/28/2022]
Abstract
Contrast media are considered to cause acute kidney injury by activating various factors that induce renal vasoconstriction. We analysed the renal microvascular haemodynamic response using the Doppler flow wire method. Then changes in urinary liver-type fatty acid-binding protein levels following contrast medium administration were compared between groups with or without a micro-injury of the kidney. In the group without renal micro-injury, the average peak velocity (APV) decreased significantly, whereas the renal artery resistance index (RI) increased significantly following contrast medium administration. In contrast, there was no significant change in either the APV or RI in the group with a renal micro-injury. A blunted microvascular response was found in the micro-injury group, whereas microvascular resistance increased in the non-micro-injury group.
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Affiliation(s)
- Osamu Kurihara
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan.
| | - Yoshihiko Seino
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Yusaku Shibata
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Masato Matsushita
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Hidenori Komiyama
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Katsuhito Kato
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Daisuke Murakami
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Ryo Munakata
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Masamichi Takano
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Yasushi Miyauchi
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Noritake Hata
- Cardiovascular Centre, Nippon Medical School Chiba Hokusoh Hospital, Chiba, Japan
| | - Wataru Shimizu
- Department of Cardiovascular Medicine, Nippon Medical School, Tokyo, Japan
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17
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Heyman SN, Leibowitz D, Mor-Yosef Levi I, Liberman A, Eisenkraft A, Alcalai R, Khamaisi M, Rosenberger C. Adaptive response to hypoxia and remote ischaemia pre-conditioning: a new hypoxia-inducible factors era in clinical medicine. Acta Physiol (Oxf) 2016; 216:395-406. [PMID: 26449466 DOI: 10.1111/apha.12613] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/01/2015] [Accepted: 10/02/2015] [Indexed: 01/30/2023]
Abstract
Transient ischaemia leads to tolerance to subsequent protracted ischaemia. This 'ischaemia pre-conditioning' results from the induction of numerous protective genes, involved in cell metabolism, proliferation and survival, in antioxidant capacity, angiogenesis, vascular tone and erythropoiesis. Hypoxia-inducible factors (HIF) play a pivotal role in this transcriptional adaptive response. HIF prolyl hydroxylases (PHDs), serving as oxygen sensors, control HIFα degradation. HIF-mediated ischaemic pre-conditioning can be achieved with the administration of PHD inhibitors, with the attenuation of organ injury under various hypoxic and toxic insults. Clinical trials are currently under way, evaluating PHD inhibitors as inducers of erythropoietin. Once their safety is established, their potential use might be further tested in clinical trials in various forms of acute ischaemic and toxic organ damage. Repeated transient limb ischaemia was also found to attenuate ischaemic injury in remote organs. This 'remote ischaemic pre-conditioning' phenomenon (RIP) has been extensively studied recently in small clinical trials, preceding, or in parallel with an abrupt insult, such as myocardial infarction, cardiac surgery or radiocontrast administration. Initial results are promising, suggesting organ protection. Large-scale multi-centre studies are currently under way, evaluating the protective potential of RIP in cardiac surgery, in the management of myocardial infarction and in organ transplantation. The mechanisms of organ protection provided by RIP are poorly understood, but HIF seemingly play a role as well. Thus, Inhibition of HIF degradation with PHD inhibitors, as well as RIP (in part through HIF), might develop into novel clinical interventions in organ protection in the near future.
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Affiliation(s)
- S. N. Heyman
- Department of Medicine; Hadassah Hebrew University Hospitals; Jerusalem Israel
| | - D. Leibowitz
- Department of Medicine; Hadassah Hebrew University Hospitals; Jerusalem Israel
- Department of Cardiology; Hadassah Hebrew University Hospitals; Jerusalem Israel
| | - I. Mor-Yosef Levi
- Department of Nephrology; Hadassah Hebrew University Hospitals; Jerusalem Israel
| | - A. Liberman
- Department of Neurology; Hadassah Hebrew University Hospitals; Jerusalem Israel
| | - A. Eisenkraft
- The Research Institute for Military Medicine; The Hebrew University Medical School and the Israeli Defense Force Medical Corps; Jerusalem Israel
| | - R. Alcalai
- Department of Medicine; Hadassah Hebrew University Hospitals; Jerusalem Israel
- Department of Cardiology; Hadassah Hebrew University Hospitals; Jerusalem Israel
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18
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Wang X, Liu K, Li B, Li Y, Ye K, Qi J, Wang Y. Macrophages Aggravate Hypoxia-Induced Cardiac Microvascular Endothelial Cell Injury via Peroxynitrite: Protection by Tongxinluo. ACTA ACUST UNITED AC 2016; 22:39-47. [PMID: 27001368 DOI: 10.3109/15419061.2016.1155565] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Activated macrophages contribute to endothelial dysfunction; however, it is unclear how peroxynitrite contributes to macrophage-mediated human cardiac microvascular endothelial cell (HCMEC) injury in hypoxia. In macrophage-HCMEC co-cultures subjected to hypoxia, there was an increase in hypoxia-inducible factor (HIF)-1α, HIF-2α, inducible nitric oxide synthase (iNOS), endothelin-converting enzyme (ECE)-1 and cyclooxygenase-2 (COX-2), and concomitant decrease in prostacyclin synthase (PGIS). This was mimicked by a peroxynitrite donor and attenuated by its decomposition catalyst. Tongxinluo (TXL) could decrease HIF-2α, iNOS, ECE-1 and COX-2 and increase PGIS in a dose-dependent manner, with increase of vascular endothelial growth factor. The protein alterations verified the remarkably affected mRNAs, indicating that the effects of TXL were similar to but better than that of peroxynitrite decomposition catalyst. Furthermore, TXL inhibited macrophage-mediated nitrotyrosine accumulation and attenuated HCMEC injury. The results suggest that peroxynitrite contributes to macrophage-mediated HCMEC injury in hypoxia, and TXL attenuates HCMEC injury mainly by inhibiting peroxynitrite.
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Affiliation(s)
- Xiujuan Wang
- a Department of Biochemistry, Hebei Key Laboratory of Medical Biotechnology , Hebei Medical University , Shijiazhuang , P.R. China
| | - Kun Liu
- a Department of Biochemistry, Hebei Key Laboratory of Medical Biotechnology , Hebei Medical University , Shijiazhuang , P.R. China
| | - Bin Li
- a Department of Biochemistry, Hebei Key Laboratory of Medical Biotechnology , Hebei Medical University , Shijiazhuang , P.R. China
| | - Yanning Li
- b Department of Molecular Biology Hebei Key Lab of Laboratory Animal , Hebei Medical University , Shijiazhuang , P.R. China
| | - Kaiwei Ye
- a Department of Biochemistry, Hebei Key Laboratory of Medical Biotechnology , Hebei Medical University , Shijiazhuang , P.R. China
| | - Jinsheng Qi
- a Department of Biochemistry, Hebei Key Laboratory of Medical Biotechnology , Hebei Medical University , Shijiazhuang , P.R. China
| | - Yu Wang
- b Department of Molecular Biology Hebei Key Lab of Laboratory Animal , Hebei Medical University , Shijiazhuang , P.R. China
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19
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Gras E, Belaidi E, Briançon-Marjollet A, Pépin JL, Arnaud C, Godin-Ribuot D. Endothelin-1 mediates intermittent hypoxia-induced inflammatory vascular remodeling through HIF-1 activation. J Appl Physiol (1985) 2015; 120:437-43. [PMID: 26679613 DOI: 10.1152/japplphysiol.00641.2015] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 12/16/2015] [Indexed: 02/04/2023] Open
Abstract
Obstructive sleep apnea (OSA) is a major risk factor for cardiovascular mortality, and apnea-induced intermittent hypoxia (IH) is known to promote various cardiovascular alterations such as vascular remodeling. However, the mechanisms that underlie IH remain incompletely investigated. We previously demonstrated that the hypoxia-inducible factor-1 (HIF-1) and endothelin-1 (ET-1) are involved in arterial hypertension and myocardial susceptibility to infarction induced by IH. Thus the objective of the present study was to investigate whether both ET-1 and HIF-1 were also involved in the vascular inflammatory remodeling induced by IH. Mice partially deficient for the Hif1α gene (HIF-1α(+/-)) and their wild-type equivalents, as well as C57BL/6J mice, treated or not with bosentan, a dual endothelin receptor antagonist, were exposed to IH or normoxia for 2 wk, 8 h/day. Splenocyte proliferative and secretory capacities, aortic nuclear factor-κB (NF-κB) and HIF-1 activities, and expression of cytokines and intima-media thickness (IMT) were measured. IH induced a systemic and aortic inflammation characterized by an increase in splenocyte proliferative and secretory capacities, aortic NF-κB activity, and cytokine expression in the aortic wall. This was accompanied by an increase in IMT. These modifications were prevented in HIF-1α(+/-) and bosentan-treated mice. The results of this study suggest that ET-1 is a major contributor to the vascular inflammatory remodeling induced by OSA-related IH, probably through HIF-1-dependent activation of NF-κB.
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Affiliation(s)
- Emmanuelle Gras
- Université Grenoble Alpes, Laboratoire HP2, Grenoble, France; INSERM, U1042, Grenoble, France; and
| | - Elise Belaidi
- Université Grenoble Alpes, Laboratoire HP2, Grenoble, France; INSERM, U1042, Grenoble, France; and
| | - Anne Briançon-Marjollet
- Université Grenoble Alpes, Laboratoire HP2, Grenoble, France; INSERM, U1042, Grenoble, France; and
| | - Jean-Louis Pépin
- Université Grenoble Alpes, Laboratoire HP2, Grenoble, France; INSERM, U1042, Grenoble, France; and CHU de Grenoble, Grenoble, France
| | - Claire Arnaud
- Université Grenoble Alpes, Laboratoire HP2, Grenoble, France; INSERM, U1042, Grenoble, France; and
| | - Diane Godin-Ribuot
- Université Grenoble Alpes, Laboratoire HP2, Grenoble, France; INSERM, U1042, Grenoble, France; and
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