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Hernandez Torres LD, Rezende F, Peschke E, Will O, Hövener JB, Spiecker F, Özorhan Ü, Lampe J, Stölting I, Aherrahrou Z, Künne C, Kusche-Vihrog K, Matschl U, Hille S, Brandes RP, Schwaninger M, Müller OJ, Raasch W. Incidence of microvascular dysfunction is increased in hyperlipidemic mice, reducing cerebral blood flow and impairing remote memory. Front Endocrinol (Lausanne) 2024; 15:1338458. [PMID: 38469142 PMCID: PMC10925718 DOI: 10.3389/fendo.2024.1338458] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 01/24/2024] [Indexed: 03/13/2024] Open
Abstract
Introduction The development of cognitive dysfunction is not necessarily associated with diet-induced obesity. We hypothesized that cognitive dysfunction might require additional vascular damage, for example, in atherosclerotic mice. Methods We induced atherosclerosis in male C57BL/6N mice by injecting AAV-PCSK9DY (2x1011 VG) and feeding them a cholesterol-rich Western diet. After 3 months, mice were examined for cognition using Barnes maze procedure and for cerebral blood flow. Cerebral vascular morphology was examined by immunehistology. Results In AAV-PCSK9DY-treated mice, plaque burden, plasma cholesterol, and triglycerides are elevated. RNAseq analyses followed by KEGG annotation show increased expression of genes linked to inflammatory processes in the aortas of these mice. In AAV-PCSK9DY-treated mice learning was delayed and long-term memory impaired. Blood flow was reduced in the cingulate cortex (-17%), caudate putamen (-15%), and hippocampus (-10%). Immunohistological studies also show an increased incidence of string vessels and pericytes (CD31/Col IV staining) in the hippocampus accompanied by patchy blood-brain barrier leaks (IgG staining) and increased macrophage infiltrations (CD68 staining). Discussion We conclude that the hyperlipidemic PCSK9DY mouse model can serve as an appropriate approach to induce microvascular dysfunction that leads to reduced blood flow in the hippocampus, which could explain the cognitive dysfunction in these mice.
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Affiliation(s)
| | - Flavia Rezende
- Institute for Cardiovascular Physiology, Faculty of Medicine, Goethe-University Frankfurt, Frankfurt, Germany
- DZHK (German Center for Cardiovascular Research) Partner Site Rhine-Main, Germany
| | - Eva Peschke
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, Universitätsklinikum Schleswig-Holstein (UKSH), Kiel University, Kiel, Germany
| | - Olga Will
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, Universitätsklinikum Schleswig-Holstein (UKSH), Kiel University, Kiel, Germany
| | - Jan-Bernd Hövener
- Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, Universitätsklinikum Schleswig-Holstein (UKSH), Kiel University, Kiel, Germany
| | - Frauke Spiecker
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Ümit Özorhan
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Josephine Lampe
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Ines Stölting
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Zouhair Aherrahrou
- Institute for Cardiogenetics, University Lübeck; University of Lübeck, Lübeck, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
| | - Carsten Künne
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Kristina Kusche-Vihrog
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
- Institute for Physiology, University Lübeck, Lübeck, Germany
| | - Urte Matschl
- Department Virus Immunology, Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Susanne Hille
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
- Department of Internal Medicine III, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Ralf P. Brandes
- Institute for Cardiovascular Physiology, Faculty of Medicine, Goethe-University Frankfurt, Frankfurt, Germany
- DZHK (German Center for Cardiovascular Research) Partner Site Rhine-Main, Germany
| | - Markus Schwaninger
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
- CBBM (Centre for Brain, Behavior and Metabolism), University of Lübeck, Lübeck, Germany
| | - Oliver J. Müller
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
- Department of Internal Medicine III, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Walter Raasch
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
- CBBM (Centre for Brain, Behavior and Metabolism), University of Lübeck, Lübeck, Germany
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Vahldieck C, Fels B, Löning S, Nickel L, Weil J, Kusche-Vihrog K. Prolonged Door-to-Balloon Time Leads to Endothelial Glycocalyx Damage and Endothelial Dysfunction in Patients with ST-Elevation Myocardial Infarction. Biomedicines 2023; 11:2924. [PMID: 38001925 PMCID: PMC10669223 DOI: 10.3390/biomedicines11112924] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/26/2023] Open
Abstract
Damage to the endothelial glycocalyx (eGC) has been reported during acute ischemic events like ST-elevation myocardial infarction (STEMI). In STEMI, a door-to-balloon time (D2B) of <60 min was shown to reduce mortality and nonfatal complications. Here, we hypothesize that eGC condition is associated with D2B duration and endothelial function during STEMI. One hundred and twenty-six individuals were analyzed in this study (STEMI patients vs. age-/sex-matched healthy volunteers). After stimulating endothelial cells with patient/control sera, the eGC's nanomechanical properties (i.e., height/stiffness) were analyzed using the atomic force microscopy-based nanoindentation technique. eGC components were determined via ELISA, and measurements of nitric oxide levels (NO) were based on chemiluminescence. eGC height/stiffness (both p < 0.001), as well as NO concentration (p < 0.001), were reduced during STEMI. Notably, the D2B had a strong impact on the endothelial condition: a D2B > 60 min led to significantly higher serum concentrations of eGC components (syndecan-1: p < 0.001/heparan sulfate: p < 0.001/hyaluronic acid: p < 0.0001). A D2B > 60 min led to the pronounced loss of eGC height/stiffness (both, p < 0.001) with reduced NO concentrations (p < 0.01), activated the complement system (p < 0.001), and prolonged the hospital stay (p < 0.01). An increased D2B led to severe eGC shedding, with endothelial dysfunction in a temporal context. eGC components and pro-inflammatory mediators correlated with a prolonged D2B, indicating a time-dependent immune reaction during STEMI, with a decreased NO concentration. Thus, D2B is a crucial factor for eGC damage during STEMI. Clinical evaluation of the eGC condition might serve as an important predictor for the endothelial function of STEMI patients in the future.
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Affiliation(s)
- Carl Vahldieck
- Department of Anesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein Campus Luebeck, 23538 Luebeck, Germany
- Institute of Physiology, University of Luebeck, 23562 Luebeck, Germany; (B.F.); (K.K.-V.)
| | - Benedikt Fels
- Institute of Physiology, University of Luebeck, 23562 Luebeck, Germany; (B.F.); (K.K.-V.)
- DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Luebeck/Kiel, 23562 Luebeck, Germany
| | - Samuel Löning
- Institute of Physiology, University of Luebeck, 23562 Luebeck, Germany; (B.F.); (K.K.-V.)
| | - Laura Nickel
- Medizinische Klinik II, Sana Kliniken Luebeck, 23560 Luebeck, Germany (J.W.)
| | - Joachim Weil
- Medizinische Klinik II, Sana Kliniken Luebeck, 23560 Luebeck, Germany (J.W.)
| | - Kristina Kusche-Vihrog
- Institute of Physiology, University of Luebeck, 23562 Luebeck, Germany; (B.F.); (K.K.-V.)
- DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Luebeck/Kiel, 23562 Luebeck, Germany
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Vahldieck C, Cianflone E, Fels B, Löning S, Depelmann P, Sabatino J, Salerno N, Karsten CM, Torella D, Weil J, Sun D, Goligorsky MS, Kusche-Vihrog K. Endothelial Glycocalyx and Cardiomyocyte Damage Is Prevented by Recombinant Syndecan-1 in Acute Myocardial Infarction. Am J Pathol 2023; 193:474-492. [PMID: 36669683 PMCID: PMC10123521 DOI: 10.1016/j.ajpath.2022.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 11/24/2022] [Accepted: 12/20/2022] [Indexed: 01/19/2023]
Abstract
The outer layer of endothelial cells (ECs), consisting of the endothelial glycocalyx (eGC) and the cortex (CTX), provides a protective barrier against vascular diseases. Structural and functional impairments of their mechanical properties are recognized as hallmarks of endothelial dysfunction and can lead to cardiovascular events, such as acute myocardial infarction (AMI). This study investigated the effects of AMI on endothelial nanomechanics and function and the use of exogenous recombinant syndecan-1 (rSyn-1), a major component of the eGC, as recovering agent. ECs were exposed in vitro to serum samples collected from patients with AMI. In addition, in situ ECs of ex vivo aorta preparations derived from a mouse model for AMI were employed. Effects were quantified by using atomic force microscopy-based nanoindentation measurements, fluorescence staining, and histologic examination of the mouse hearts. AMI serum samples damaged eGC/CTX and augmented monocyte adhesion to the endothelial surface. In particular, the anaphylatoxins C3a and C5a played an important role in these processes. The impairment of endothelial function could be prevented by rSyn-1 treatment. In the mouse model of myocardial infarction, pretreatment with rSyn-1 alleviated eGC/CTX deterioration and reduced cardiomyocyte damage in histologic analyses. However, echocardiographic measurements did not indicate a functional benefit. These results provide new insights into the underlying mechanisms of AMI-induced endothelial dysfunction and perspectives for future studies on the benefit of rSyn-1 in post-AMI treatment.
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Affiliation(s)
- Carl Vahldieck
- Institute of Physiology, University of Luebeck, Luebeck, Germany; Department of Anesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein Campus Luebeck, University of Luebeck, Luebeck, Germany.
| | - Eleonora Cianflone
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Catanzaro, Italy
| | - Benedikt Fels
- Institute of Physiology, University of Luebeck, Luebeck, Germany; DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Luebeck/Kiel, Luebeck, Germany
| | - Samuel Löning
- Institute of Physiology, University of Luebeck, Luebeck, Germany
| | - Patrik Depelmann
- Institute of Physiology, University of Luebeck, Luebeck, Germany
| | - Jolanda Sabatino
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Catanzaro, Italy; Division of Pediatric Cardiology, Department of Women's and Children's Health, University Hospital Padua, Padua, Italy; Pediatric Research Institute "Città della Speranza", Padua, Italy
| | - Nadia Salerno
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, Catanzaro, Italy
| | - Christian M Karsten
- Institute for Systemic Inflammation Research, University of Luebeck, Luebeck, Germany
| | - Daniele Torella
- Department of Experimental and Clinical Medicine, University Magna Græcia of Catanzaro, Catanzaro, Italy
| | - Joachim Weil
- Medizinische Klinik II, Sana Kliniken Luebeck, Luebeck, Germany
| | - Dong Sun
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology, New York Medical College, Valhalla, New York
| | - Michael S Goligorsky
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology, New York Medical College, Valhalla, New York
| | - Kristina Kusche-Vihrog
- Institute of Physiology, University of Luebeck, Luebeck, Germany; DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Luebeck/Kiel, Luebeck, Germany
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Stawschenko E, Schaller T, Kern B, Bode B, Dörries F, Kusche-Vihrog K, Gehring H, Wegerich P. Current Status of Measurement Accuracy for Total Hemoglobin Concentration in the Clinical Context. Biosensors (Basel) 2022; 12:1147. [PMID: 36551114 PMCID: PMC9775510 DOI: 10.3390/bios12121147] [Citation(s) in RCA: 1] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/22/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
OBJECTIVE The main objective of this investigation is to provide data about the accuracy of total hemoglobin concentration measurements with respect to clinical settings, and to devices within the categories of point-of-care and reference systems. In particular, tolerance of hemoglobin concentrations below 9 g/dL that have become common in clinical practice today determines the need to demonstrate the limits of measurement accuracy in patient care. METHODS Samples extracted from six units of heparinized human blood with total hemoglobin concentrations ranging from 3 to 18 g/dL were assigned to the test devices in a random order. The pool of test devices comprised blood gas analyzers, an automatic hematology analyzer, a laboratory reference method, and the point-of-care system HemoCue. To reduce the pre-analytic error, each sample was measured three times. Due to the characteristics of the tested devices and methods, we selected the mean values of the data from all these devices, measured at the corresponding total hemoglobin concentrations, as the reference. MAIN RESULTS The measurement results of the test devices overlap within strict limits (R2 = 0.999). Only the detailed analysis provides information about minor but systematic deviations. In the group of clinically relevant devices, which are involved in patient blood management decisions, the relative differences were within the limit of +/- 5 % for values down to 3 g/dL. CONCLUSIONS A clinically relevant change of +/- 0.5 g/dL of total hemoglobin concentration can be detected with all selected devices and methods. Compliance with more stringent definitions-these are the relative differences of 5 % in relation to the corresponding reference values and the clinically adapted thresholds in the format of a tolerance level analysis-was achieved by the clinical devices assessed here.
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Affiliation(s)
- Elena Stawschenko
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - Tim Schaller
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
- Institute of Biomedical Engineering, University of Luebeck, 23562 Luebeck, Germany
| | - Benjamin Kern
- Medical Sensors and Devices Laboratory, Lübeck University of Applied Sciences, 23562 Luebeck, Germany
| | - Berit Bode
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - Frank Dörries
- Northern Scientific Tec & Integration GmbH, Kollaustr. 11-13, 22525 Hamburg, Germany
| | | | - Hartmut Gehring
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany
| | - Philipp Wegerich
- Institute of Biomedical Engineering, University of Luebeck, 23562 Luebeck, Germany
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Schwalm LC, Bäcker S, Weisser B, Kusche-Vihrog K. Effects of improved cardiovascular performance on vascular function – a pilot study. Dtsch Z Sportmed 2022. [DOI: 10.5960/dzsm.2022.547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Achner L, Klersy T, Fels B, Reinberger T, Schmidt CX, Groß N, Hille S, Müller OJ, Aherrahrou Z, Kusche-Vihrog K, Raasch W. AFM-based nanoindentation indicates an impaired cortical stiffness in the AAV-PCSK9 DY atherosclerosis mouse model. Pflugers Arch 2022; 474:993-1002. [PMID: 35648220 PMCID: PMC9393126 DOI: 10.1007/s00424-022-02710-x] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/22/2022] [Indexed: 12/23/2022]
Abstract
Investigating atherosclerosis and endothelial dysfunction has mainly become established in genetically modified ApoE−/− or LDL-R−/− mice transgenic models. A new AAV-PCSK9DYDY mouse model with no genetic modification has now been reported as an alternative atherosclerosis model. Here, we aimed to employ this AAV-PCSK9DY mouse model to quantify the mechanical stiffness of the endothelial surface, an accepted hallmark for endothelial dysfunction and forerunner for atherosclerosis. Ten-week-old male C57BL/6 N mice were injected with AAV-PCSK9DY (0.5, 1 or 5 × 1011 VG) or saline as controls and fed with Western diet (1.25% cholesterol) for 3 months. Total cholesterol (TC) and triglycerides (TG) were measured after 6 and 12 weeks. Aortic sections were used for atomic force microscopy (AFM) measurements or histological analysis using Oil-Red-O staining. Mechanical properties of in situ endothelial cells derived from ex vivo aorta preparations were quantified using AFM-based nanoindentation. Compared to controls, an increase in plasma TC and TG and extent of atherosclerosis was demonstrated in all groups of mice in a viral load-dependent manner. Cortical stiffness of controls was 1.305 pN/nm and increased (10%) in response to viral load (≥ 0.5 × 1011 VG) and positively correlated with the aortic plaque content and plasma TC and TG. For the first time, we show changes in the mechanical properties of the endothelial surface and thus the development of endothelial dysfunction in the AAV-PCSK9DY mouse model. Our results demonstrate that this model is highly suitable and represents a good alternative to the commonly used transgenic mouse models for studying atherosclerosis and other vascular pathologies.
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Affiliation(s)
- Leonie Achner
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Germany
| | - Tobias Klersy
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Germany
| | - Benedikt Fels
- Institute for Physiology, University Lübeck, Lübeck, Germany
| | - Tobias Reinberger
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/, Lübeck, Germany.,Institute for Cardiogenetics, University Lübeck, Lübeck, Germany
| | - Cosima X Schmidt
- Institute of Neurobiology, University of Lübeck, Lübeck, Germany
| | - Natalie Groß
- Institute for Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Susanne Hille
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/, Lübeck, Germany.,Department of Internal Medicine III, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Oliver J Müller
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/, Lübeck, Germany.,Department of Internal Medicine III, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Zouhair Aherrahrou
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/, Lübeck, Germany.,Institute for Cardiogenetics, University Lübeck, Lübeck, Germany
| | - Kristina Kusche-Vihrog
- Institute for Physiology, University Lübeck, Lübeck, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/, Lübeck, Germany
| | - Walter Raasch
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Germany. .,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/, Lübeck, Germany. .,CBBM (Centre for Brain, Behavior and Metabolism), University of Lübeck, Lübeck, Germany.
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Pacia MZ, Chorazy N, Sternak M, Fels B, Pacia M, Kepczynski M, Kusche-Vihrog K, Chlopicki S. Rac1 regulates lipid droplets formation, nanomechanical, and nanostructural changes induced by TNF in vascular endothelium in the isolated murine aorta. Cell Mol Life Sci 2022; 79:317. [PMID: 35622139 PMCID: PMC9142475 DOI: 10.1007/s00018-022-04362-7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/21/2022] [Accepted: 05/09/2022] [Indexed: 11/24/2022]
Abstract
Endothelial inflammation is recognized as a critical condition in the development of cardiovascular diseases. TNF-induced inflammation of endothelial cells is linked to the formation of lipid droplets, augmented cortical stiffness, and nanostructural endothelial plasma membrane remodelling, but the insight into the mechanism linking these responses is missing. In the present work, we determined the formation of lipid droplets (LDs), nanomechanical, and nanostructural responses in the model of TNF-activated vascular inflammation in the isolated murine aorta using Raman spectroscopy, fluorescence imaging, atomic force microscopy (AFM), and scanning electron microscopy (SEM). We analysed the possible role of Rac1, a major regulator of cytoskeletal organization, in TNF-induced vascular inflammation. We demonstrated that the formation of LDs, polymerization of F-actin, alterations in cortical stiffness, and nanostructural protuberances in endothelial plasma membrane were mediated by the Rac1. In particular, we revealed a significant role for Rac1 in the regulation of the formation of highly unsaturated LDs formed in response to TNF. Inhibition of Rac1 also downregulated the overexpression of ICAM-1 induced by TNF, supporting the role of Rac1 in vascular inflammation. Altogether, our results demonstrate that LDs formation, an integral component of vascular inflammation, is activated by Rac1 that also regulates nanomechanical and nanostructural alterations linked to vascular inflammation.
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Affiliation(s)
- Marta Z Pacia
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland.
| | - Natalia Chorazy
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland
| | - Magdalena Sternak
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland
| | - Benedikt Fels
- Institute of Physiology, University of Luebeck, 160 Ratzeburger Allee, 23562, Luebeck, Germany
- DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Michal Pacia
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387, Krakow, Poland
| | - Mariusz Kepczynski
- Faculty of Chemistry, Jagiellonian University, 2 Gronostajowa Str., 30-387, Krakow, Poland
| | - Kristina Kusche-Vihrog
- Institute of Physiology, University of Luebeck, 160 Ratzeburger Allee, 23562, Luebeck, Germany
- DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Stefan Chlopicki
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, 14 Bobrzynskiego Str., 30-348, Krakow, Poland
- Chair of Pharmacology, Jagiellonian University, 16 Grzegorzecka Str., 31-531, Krakow, Poland
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Matyjaszczyk-Gwarda K, Kij A, Olkowicz M, Fels B, Kusche-Vihrog K, Walczak M, Chlopicki S. Simultaneous quantification of selected glycosaminoglycans by butanolysis-based derivatization and LC-SRM/MS analysis for assessing glycocalyx disruption in vitro and in vivo. Talanta 2022; 238:123008. [PMID: 34857342 DOI: 10.1016/j.talanta.2021.123008] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 11/25/2022]
Abstract
Glycosaminoglycans (GAGs) constitute the main building blocks of the endothelial glycocalyx (GLX), and disruption of GLX initiates and promotes endothelial dysfunction. Here, we aimed to develop a novel, specific and accurate LC-SRM/MS-based method for glycosaminoglycans (GAGs) profiling. The method involved butanolysis derivatization to facilitate GAG-specific disaccharide generation and its subsequent retention in LC-reversed-phase mode followed by mass spectrometric detection performed in positive ion-selected reaction monitoring (SRM) mode. GAG contents were measured in media of endothelial cells (EA.hy926) subjected to various GAG-degrading enzymes, as well as in murine plasma and urine in apolipoprotein E/low-density lipoprotein receptor-deficient (ApoE/LDLR -/-) mice and age-matched wild-type C57BL/6 mice. Alternatively, GLX disruption was verified by atomic force microscopy (AFM)-based analysis of GLX thickness. The proposed assay to quantify GAG-specific disaccharides presented high sensitivity for each of the analytes (LLOQ: 0.05-0.1 μg/mL) as well as accuracy and precision (86.8-114.9% and 2.0-14.3%, respectively). In medium of EA.hy926 cells subjected to GAG-degrading enzymes various GAG-specific disaccharides indicating the degradation of keratan sulphate (KS), heparan sulphate (HS), chondroitin sulphate (CHS) or hyaluronan (HA) were detected as predicted based on the characteristics of individual enzyme activity. In turn, AFM-based assessment of GLX thickness was reduced to a similar extent by all single enzyme treatments, whereas the most prominent reduction of GLX thickness was detected following the enzyme mixture. Plasma measurements of GAGs revealed age- and hypercholesterolemia-dependent decrease in GAGs concentration. In summary, a novel LC-SRM/MS-based method for GAG profiling was proposed that may inform on GLX status in cell culture for both in vitro and in vivo conditions.
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Affiliation(s)
- Karolina Matyjaszczyk-Gwarda
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), Bobrzynskiego 14, 30-348, Krakow, Poland
| | - Agnieszka Kij
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), Bobrzynskiego 14, 30-348, Krakow, Poland
| | - Mariola Olkowicz
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), Bobrzynskiego 14, 30-348, Krakow, Poland
| | - Benedikt Fels
- Universität zu Lübeck, Institut für Physiologie, Ratzeburger Allee 160, Gebäude 61, D-23562, Lübeck, Germany
| | - Kristina Kusche-Vihrog
- Universität zu Lübeck, Institut für Physiologie, Ratzeburger Allee 160, Gebäude 61, D-23562, Lübeck, Germany
| | - Maria Walczak
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), Bobrzynskiego 14, 30-348, Krakow, Poland; Jagiellonian University Medical College, Chair and Department of Toxicology, Medyczna 9, 30-688, Krakow, Poland
| | - Stefan Chlopicki
- Jagiellonian University, Jagiellonian Centre for Experimental Therapeutics (JCET), Bobrzynskiego 14, 30-348, Krakow, Poland; Jagiellonian University Medical College, Chair of Pharmacology, Grzegorzecka 16, 31-531, Krakow, Poland.
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Graßhoff H, Müller-Fielitz H, Dogbevia GK, Körbelin J, Bannach J, Vahldieck CM, Kusche-Vihrog K, Jöhren O, Müller OJ, Nogueiras R, Prevot V, Schwaninger M. Short regulatory DNA sequences to target brain endothelial cells for gene therapy. J Cereb Blood Flow Metab 2022; 42:104-120. [PMID: 34427142 PMCID: PMC8721777 DOI: 10.1177/0271678x211039617] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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] [Indexed: 11/17/2022]
Abstract
Gene vectors targeting CNS endothelial cells allow to manipulate the blood-brain barrier and to correct genetic defects in the CNS. Because vectors based on the adeno-associated virus (AAV) have a limited capacity, it is essential that the DNA sequence controlling gene expression is short. In addition, it must be specific for endothelial cells to avoid off-target effects. To develop improved regulatory sequences with selectivity for brain endothelial cells, we tested the transcriptional activity of truncated promoters of eleven (brain) endothelial-specific genes in combination with short regulatory elements, i.e., the woodchuck post-transcriptional regulatory element (W), the CMV enhancer element (C), and a fragment of the first intron of the Tie2 gene (S), by transfecting brain endothelial cells of three species. Four combinations of regulatory elements and short promoters (Cdh5, Ocln, Slc2a1, and Slco1c1) progressed through this in-vitro pipeline displaying suitable activity. When tested in mice, the regulatory sequences C-Ocln-W and C-Slc2a1-S-W enabled a stronger and more specific gene expression in brain endothelial cells than the frequently used CAG promoter. In summary, the new regulatory elements efficiently control gene expression in brain endothelial cells and may help to specifically target the blood-brain barrier with gene therapy vectors.
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Affiliation(s)
- Hanna Graßhoff
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany
| | - Helge Müller-Fielitz
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany
| | - Godwin K Dogbevia
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany
| | - Jakob Körbelin
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany.,Department of Oncology, Hematology and Bone Marrow Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jacqueline Bannach
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany
| | | | | | - Olaf Jöhren
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany
| | - Oliver J Müller
- Department of Internal Medicine III (Cardiology, Angiology and Internal Intensive Care Medicine), University Hospital Schleswig-Holstein, University of Kiel, Kiel, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany
| | - Ruben Nogueiras
- Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
| | - Vincent Prevot
- Inserm, CHU Lille, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille Neuroscience & Cognition, UMR-S 1172, DISTALZ, European Genomic Institute for Diabetes, University of Lille, Lille, France
| | - Markus Schwaninger
- Institute for Experimental and Clinical Pharmacology and Toxicology, Center of Brain, Behavior and Metabolism, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany
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10
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Meusel M, Wegerich P, Bode B, Stawschenko E, Kusche-Vihrog K, Hellbrück H, Gehring H. Measurement of Blood Pressure by Ultrasound-The Applicability of Devices, Algorithms and a View in Local Hemodynamics. Diagnostics (Basel) 2021; 11:2255. [PMID: 34943492 PMCID: PMC8700406 DOI: 10.3390/diagnostics11122255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Due to ongoing technical progress, the ultrasonic measurement of blood pressure (BP) as an alternative to oscillometric measurement (NIBP) or the continuous non-invasive arterial pressure method (CNAP) moves further into focus. The US method offers several advantages over NIBP and CNAP, such as deep tissue penetration and the utilization of different arterial locations. APPROACH Ten healthy subjects (six female, aged 30.9 ± 4.6 years) volunteered in our investigation. In the ultrasonic BP measurement, we differentiated between the directly measured (pulsatile diastolic and systolic vessel diameter) and indirectly calculated variables at three different artery locations on both arms, with two different ultrasound devices in the transversal and longitudinal directions of the transducer. Simultaneously, NIBP monitoring served as reference BP, while CNAP monitored the steady state condition of the arm under investigation. The Moens-Korteweg algorithm (MKE) and the algorithm of the working group of San Diego (SanD) were selected for the indirectly calculated ultrasonic BP data. MAIN RESULTS With US, we were able to measure the BP at each selected arterial position. Due to the investigation setup, we found small but significant interactions of the main effects. Bland and Altman analysis revealed that US-BP measurement was similar to NIBP, with superior accuracy when compared to the established CNAP method. In addition, US-BP measurement showed that the measurement accuracy of both arms can be regarded as identical. In a detailed comparison of the selected arterial vascular sections, systematic discrepancies between the right and left arm could be observed. CONCLUSION In our pilot study, we measured BP effectively and accurately by US using two different devices. Our findings suggest that ultrasonic BP measurement is an adequate alternative for live and continuous hemodynamic monitoring.
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Affiliation(s)
- Moritz Meusel
- Department of Cardiology, Angiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany;
| | - Philipp Wegerich
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany; (P.W.); (B.B.); (E.S.)
- Institute of Biomedical Engineering, University of Luebeck, 23562 Luebeck, Germany
| | - Berit Bode
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany; (P.W.); (B.B.); (E.S.)
| | - Elena Stawschenko
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany; (P.W.); (B.B.); (E.S.)
| | | | - Horst Hellbrück
- Department of Electrical Engineering and Computer Science, Technical University of Applied Sciences Luebeck, 23562 Luebeck, Germany;
| | - Hartmut Gehring
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Center Schleswig-Holstein, Campus Luebeck, 23538 Luebeck, Germany; (P.W.); (B.B.); (E.S.)
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11
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Roy-Chowdhury E, Brauns N, Helmke A, Nordlohne J, Bräsen JH, Schmitz J, Volkmann J, Fleig SV, Kusche-Vihrog K, Haller H, von Vietinghoff S. Human CD16+ monocytes promote a pro-atherosclerotic endothelial cell phenotype via CX3CR1-CX3CL1 interaction. Cardiovasc Res 2021; 117:1510-1522. [PMID: 32717023 DOI: 10.1093/cvr/cvaa234] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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: 05/13/2020] [Revised: 06/17/2020] [Accepted: 07/22/2020] [Indexed: 12/31/2022] Open
Abstract
AIMS Monocytes are central for atherosclerotic vascular inflammation. The human non-classical, patrolling subtype, which expresses high levels of CD16 and fractalkine receptor CX3CR1, strongly associates with cardiovascular events. This is most marked in renal failure, a condition with excess atherosclerosis morbidity. The underlying mechanism is not understood. This study investigated how human CD16+ monocytes modulate endothelial cell function. METHODS AND RESULTS In patients with kidney failure, CD16+ monocyte counts were elevated and dynamically decreased within a year after transplantation, chiefly due to a drop in CD14+CD16+ cells. The CX3CR1 ligand CX3CL1 was similarly elevated in the circulation of humans and mice with renal impairment. CX3CL1 up-regulation was also observed close to macrophage rich human coronary artery plaques. To investigate a mechanistic basis of this association, CD16+CX3CR1HIGH monocytes were co-incubated with primary human endothelium in vitro. Compared to classical CD14+ monocytes or transwell cocultures, CD16+ monocytes enhanced endothelial STAT1 and NF-κB p65 phosphorylation, up-regulated expression of CX3CL1 and interleukin-1β, numerous CCL and CXCL chemokines and molecules promoting leucocyte patrolling and adhesion such as ICAM1 and VCAM1. Genes required for vasodilatation including endothelial nitric oxide synthase decreased while endothelial collagen production increased. Uraemic patients' monocytes enhanced endothelial CX3CL1 even more markedly. Their receptor CX3CR1 was required for enhanced aortic endothelial stiffness in murine atherosclerosis with renal impairment. CX3CR1 dose-dependently modulated monocyte-contact-dependent gene expression in human endothelium. CONCLUSION By demonstrating endothelial proatherosclerotic gene regulation in direct contact with CD16+ monocytes, in part via cellular CX3CR1-CX3CL1 interaction, our data delineate a mechanism how this celltype can increase cardiovascular risk.
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Affiliation(s)
- Eva Roy-Chowdhury
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | - Nicolas Brauns
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | - Alexandra Helmke
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | - Johannes Nordlohne
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | | | - Jessica Schmitz
- Department of Pathology, Hannover Medical School, Hannover, Germany
| | - Julia Volkmann
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | - Susanne V Fleig
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | | | - Hermann Haller
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
| | - Sibylle von Vietinghoff
- Division of Nephrology and Hypertension, Department of Internal Medicine, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany
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12
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Cosgun ZC, Fels B, Kusche-Vihrog K. Nanomechanics of the Endothelial Glycocalyx. The American Journal of Pathology 2020; 190:732-741. [DOI: 10.1016/j.ajpath.2019.07.021] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/10/2019] [Accepted: 07/30/2019] [Indexed: 12/12/2022]
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13
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Drost CC, Rovas A, Kusche-Vihrog K, Van Slyke P, Kim H, Hoang VC, Maynes JT, Wennmann DO, Pavenstädt H, Linke W, Lukasz A, Hesse B, Kümpers P. Erratum: Tie2 Activation Promotes Protection and Reconstitution of the Endothelial Glycocalyx in Human Sepsis. Thromb Haemost 2020; 119:e1. [PMID: 31995834 DOI: 10.1055/s-0039-3400534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Carolin Christina Drost
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Alexandros Rovas
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | | | | | - Harold Kim
- Vasomune Therapeutics, Toronto, Ontario, Canada
| | - Van C Hoang
- Vasomune Therapeutics, Toronto, Ontario, Canada
| | - Jason T Maynes
- Department of Anaesthesia and Pain Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Dirk Oliver Wennmann
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Hermann Pavenstädt
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Wolfgang Linke
- Institute of Physiology II, University Hospital Münster, Münster, Germany
| | - Alexander Lukasz
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Bettina Hesse
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Philipp Kümpers
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
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14
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Bartolomaeus H, Balogh A, Yakoub M, Homann S, Markó L, Höges S, Tsvetkov D, Krannich A, Wundersitz S, Avery EG, Haase N, Kräker K, Hering L, Maase M, Kusche-Vihrog K, Grandoch M, Fielitz J, Kempa S, Gollasch M, Zhumadilov Z, Kozhakhmetov S, Kushugulova A, Eckardt KU, Dechend R, Rump LC, Forslund SK, Müller DN, Stegbauer J, Wilck N. Short-Chain Fatty Acid Propionate Protects From Hypertensive Cardiovascular Damage. Circulation 2019; 139:1407-1421. [PMID: 30586752 PMCID: PMC6416008 DOI: 10.1161/circulationaha.118.036652] [Citation(s) in RCA: 384] [Impact Index Per Article: 76.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Supplemental Digital Content is available in the text. Background: Arterial hypertension and its organ sequelae show characteristics of T cell–mediated inflammatory diseases. Experimental anti-inflammatory therapies have been shown to ameliorate hypertensive end-organ damage. Recently, the CANTOS study (Canakinumab Antiinflammatory Thrombosis Outcome Study) targeting interleukin-1β demonstrated that anti-inflammatory therapy reduces cardiovascular risk. The gut microbiome plays a pivotal role in immune homeostasis and cardiovascular health. Short-chain fatty acids (SCFAs) are produced from dietary fiber by gut bacteria and affect host immune homeostasis. Here, we investigated effects of the SCFA propionate in 2 different mouse models of hypertensive cardiovascular damage. Methods: To investigate the effect of SCFAs on hypertensive cardiac damage and atherosclerosis, wild-type NMRI or apolipoprotein E knockout–deficient mice received propionate (200 mmol/L) or control in the drinking water. To induce hypertension, wild-type NMRI mice were infused with angiotensin II (1.44 mg·kg–1·d–1 subcutaneous) for 14 days. To accelerate the development of atherosclerosis, apolipoprotein E knockout mice were infused with angiotensin II (0.72 mg·kg–1·d–1 subcutaneous) for 28 days. Cardiac damage and atherosclerosis were assessed using histology, echocardiography, in vivo electrophysiology, immunofluorescence, and flow cytometry. Blood pressure was measured by radiotelemetry. Regulatory T cell depletion using PC61 antibody was used to examine the mode of action of propionate. Results: Propionate significantly attenuated cardiac hypertrophy, fibrosis, vascular dysfunction, and hypertension in both models. Susceptibility to cardiac ventricular arrhythmias was significantly reduced in propionate-treated angiotensin II–infused wild-type NMRI mice. Aortic atherosclerotic lesion area was significantly decreased in propionate-treated apolipoprotein E knockout–deficient mice. Systemic inflammation was mitigated by propionate treatment, quantified as a reduction in splenic effector memory T cell frequencies and splenic T helper 17 cells in both models, and a decrease in local cardiac immune cell infiltration in wild-type NMRI mice. Cardioprotective effects of propionate were abrogated in regulatory T cell–depleted angiotensin II–infused mice, suggesting the effect is regulatory T cell–dependent. Conclusions: Our data emphasize an immune-modulatory role of SCFAs and their importance for cardiovascular health. The data suggest that lifestyle modifications leading to augmented SCFA production could be a beneficial nonpharmacological preventive strategy for patients with hypertensive cardiovascular disease.
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Affiliation(s)
- Hendrik Bartolomaeus
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - András Balogh
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - Mina Yakoub
- Department of Nephrology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Germany (M.Y., S. Höges, L.H., L.C.R., J.S.)
| | - Susanne Homann
- Institute of Pharmacology and Clinical Pharmacology, University Hospital, Universitätsrat, Düsseldorf, Germany (S. Homann, M.G.)
| | - Lajos Markó
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - Sascha Höges
- Department of Nephrology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Germany (M.Y., S. Höges, L.H., L.C.R., J.S.)
| | - Dmitry Tsvetkov
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Department of Pharmacology and Experimental Therapy, Institute of Experimental and Clinical Pharmacology and Toxicology, Eberhard Karls University Hospitals and Clinics and Interfaculty Center of Pharmacogenomics and Drug Research, Tübingen, Germany (D.T.)
| | - Alexander Krannich
- Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.)
| | - Sebastian Wundersitz
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.)
| | - Ellen G Avery
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - Nadine Haase
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - Kristin Kräker
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - Lydia Hering
- Department of Nephrology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Germany (M.Y., S. Höges, L.H., L.C.R., J.S.)
| | - Martina Maase
- Institute of Physiology II, University of Münster, Germany (M.M., K.K.-V.)
| | | | - Maria Grandoch
- Institute of Pharmacology and Clinical Pharmacology, University Hospital, Universitätsrat, Düsseldorf, Germany (S. Homann, M.G.)
| | - Jens Fielitz
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Greifswald (J.F.)
| | - Stefan Kempa
- Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,Integrative Proteomics and Metabolomics Platform, Berlin Institute for Medical Systems Biology, Germany (S. Kempa)
| | - Maik Gollasch
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Medizinische Klinik mit Schwerpunkt Nephrologie und Internistische Intensivmedizin Charité - Universitätsmedizin Berlin, Germany (M.G., K.-U.E., N.W.)
| | - Zhaxybay Zhumadilov
- National Laboratory Astana Nazarbayev University, Kazakhstan (Z.Z., S. Kozhakhmetov, A. Kushugalova)
| | - Samat Kozhakhmetov
- National Laboratory Astana Nazarbayev University, Kazakhstan (Z.Z., S. Kozhakhmetov, A. Kushugalova)
| | - Almagul Kushugulova
- National Laboratory Astana Nazarbayev University, Kazakhstan (Z.Z., S. Kozhakhmetov, A. Kushugalova)
| | - Kai-Uwe Eckardt
- Medizinische Klinik mit Schwerpunkt Nephrologie und Internistische Intensivmedizin Charité - Universitätsmedizin Berlin, Germany (M.G., K.-U.E., N.W.)
| | - Ralf Dechend
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.).,Department of Cardiology and Nephrology, HELIOS-Klinikum, Berlin, Germany (R.D.)
| | - Lars Christian Rump
- Department of Nephrology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Germany (M.Y., S. Höges, L.H., L.C.R., J.S.)
| | - Sofia K Forslund
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.).,European Molecular Biology Laboratory, Structural and Computational Biology Unit, Heidelberg, Germany (S.K.F.)
| | - Dominik N Müller
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.)
| | - Johannes Stegbauer
- Department of Nephrology, Medical Faculty, University Hospital Düsseldorf, Heinrich-Heine-University, Germany (M.Y., S. Höges, L.H., L.C.R., J.S.)
| | - Nicola Wilck
- Experimental and Clinical Research Center, a Cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., N.H., K.K., J.F., M.G., R.D., S.K.F., D.N.M., N.W.).,Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Germany (H.B., A.B., L.M., D.T., S.W., E.G.A., J.B., R.D., S.K.F., D.N.M., N.W.).,Max Delbruck Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.B., A.B., L.M., A. Krannich, E.G.A., N.H., K.K., S. Kempa, R.D., S.K.F., D.N.M., N.W.).,DZHK (German Centre for Cardiovascular Research), partner site Berlin (H.B., A.B., L.M., S.W., E.G.A., N.H., K.K., J.F., R.D., D.N.M., N.W.).,Berlin Institute of Health, Germany (H.B., A.B., L.M., E.G.A., N.H., K.K., R.D., S.K.F., D.N.M., N.W.).,Medizinische Klinik mit Schwerpunkt Nephrologie und Internistische Intensivmedizin Charité - Universitätsmedizin Berlin, Germany (M.G., K.-U.E., N.W.)
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15
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Hesse B, Rovas A, Buscher K, Kusche-Vihrog K, Brand M, Di Marco GS, Kielstein JT, Pavenstädt H, Linke WA, Nofer JR, Kümpers P, Lukasz A. Symmetric dimethylarginine in dysfunctional high-density lipoprotein mediates endothelial glycocalyx breakdown in chronic kidney disease. Kidney Int 2019; 97:502-515. [PMID: 32008804 DOI: 10.1016/j.kint.2019.10.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 01/23/2019] [Revised: 10/07/2019] [Accepted: 10/10/2019] [Indexed: 02/06/2023]
Abstract
Dysfunctional high-density lipoprotein (d-HDL) in chronic kidney disease is known to have a change in composition towards an endothelial-damaging phenotype, amongst others, via the accumulation of symmetric dimethylarginine. The endothelial glycocalyx, a carbohydrate-rich layer lining the endothelial luminal surface, is a first line defense against vascular diseases including atherosclerosis. Here we conducted a translational, cross-sectional study to determine the role of symmetric dimethylarginine in d-HDL as a mediator of glycocalyx damage. Using confocal and atomic force microscopy, intact HDL from healthy donors was found to maintain the glycocalyx while isolated HDL from hemodialysis patients and exogenous symmetric dimethylarginine caused significant damage to the glycocalyx in endothelial cells in vitro in a dose-dependent manner. Symmetric dimethylarginine triggered glycocalyx deterioration via molecular pathways mediated by toll-like-receptor 2 and matrix metalloprotease-9. Corresponding intravital microscopy revealed that exogenous symmetric dimethylarginine and d-HDL from hemodialysis patients caused glycocalyx breakdown, which subsequently contributed to alterations in leukocyte rolling. Biologically effective HDL, which estimates the functionality of HDL, was calculated from circulating HDL-cholesterol and symmetric dimethylarginine, as described in the literature. Biologically effective HDL was the only parameter that could independently predict glycocalyx damage in vivo. Thus, our data suggest that symmetric dimethylarginine in d-HDL mediates glycocalyx breakdown in chronic kidney disease.
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Affiliation(s)
- Bettina Hesse
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany; Institute of Physiology II, University Hospital Münster, Münster, Germany
| | - Alexandros Rovas
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
| | - Konrad Buscher
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
| | - Kristina Kusche-Vihrog
- Institute of Physiology II, University Hospital Münster, Münster, Germany; Institute of Physiology, University of Lübeck, Lübeck, Germany
| | - Marcus Brand
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
| | - Giovana Seno Di Marco
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
| | - Jan T Kielstein
- Medical Clinic V, Nephrology, Rheumatology, Blood Purification, Academic Teaching Hospital Braunschweig, Braunschweig, Germany
| | - Hermann Pavenstädt
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
| | - Wolfgang A Linke
- Institute of Physiology II, University Hospital Münster, Münster, Germany
| | - Jerzy-Roch Nofer
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Philipp Kümpers
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
| | - Alexander Lukasz
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany.
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16
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Drost CC, Rovas A, Kusche-Vihrog K, Van Slyke P, Kim H, Hoang VC, Maynes JT, Wennmann DO, Pavenstädt H, Linke W, Lukasz A, Hesse B, Kümpers P. Tie2 Activation Promotes Protection and Reconstitution of the Endothelial Glycocalyx in Human Sepsis. Thromb Haemost 2019; 119:1827-1838. [DOI: 10.1055/s-0039-1695768] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
AbstractThe endothelial glycocalyx (eGC), a carbohydrate-rich layer lining the luminal surface of the endothelium, provides a first vasoprotective barrier against vascular leakage in sepsis. We hypothesized that angiopoietin-2 (Angpt-2), antagonist of the endothelium-stabilizing receptor Tie2, induces a rapid loss of the eGC in human sepsis. Using intravital microscopy, we measured the perfused boundary region (PBR), an inverse parameter of eGC dimensions in sublingual microvessels, in patients with sepsis and age-matched nonseptic subjects. Median PBR values were significantly higher in patients compared with controls and correlated with serum Angpt-2 levels. To transfer and further explore these findings in a cell culture system, we exposed endothelial cells (ECs) to serum (5%) from a subgroup of septic patients and nonseptic controls. Confocal and atomic force microscopy revealed that sepsis serum, but not control serum, induced thinning of the eGC on human ECs in vitro, which correlated with paired PBR values obtained in vivo (r = 0.96, p < 0.01). Inhibition of Angpt-2 or Tie2 activation completely abolished eGC damage. Mechanistically, sepsis-induced eGC breakdown required the loss of its main constituent heparan sulfate; a result of heparan sulfate-specific enzyme heparanase, which was suppressed by Tie2 activation. Finally, Tie2 activation, but not Angpt-2 inhibition, initiated after septic or enzymatic damage provoked rapid refurbishment of the eGC. Our data indicate that eGC breakdown in human sepsis is mediated via Tie2 deactivation by Angpt-2. Activation of Tie2 seems to accelerate recovery of the eGC and might hold promise as a therapeutic target in human sepsis.
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Affiliation(s)
- Carolin Christina Drost
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Alexandros Rovas
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | | | | | - Harold Kim
- Vasomune Therapeutics, Toronto, Ontario, Canada
| | - Van C Hoang
- Vasomune Therapeutics, Toronto, Ontario, Canada
| | - Jason T. Maynes
- Department of Anaesthesia and Pain Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Dirk Oliver Wennmann
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Hermann Pavenstädt
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Wolfgang Linke
- Institute of Physiology II, University Hospital Münster, Münster, Germany
| | - Alexander Lukasz
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Bettina Hesse
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
| | - Philipp Kümpers
- Division of General Internal Medicine, Nephrology, and Rheumatology, Department of Medicine D, University Hospital Münster, Münster, Germany
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17
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Kisters K, Kusche-Vihrog K. [Update your knowledge on hypertension]. MMW Fortschr Med 2019; 161:65-66. [PMID: 31079367 DOI: 10.1007/s15006-019-0515-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Klaus Kisters
- Klinik für Innere Medizin, St. Anna Hospital, Hospitalstraße 19, D-44649, Herne, Deutschland.
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18
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Abstract
SIGNIFICANCE Stiffness of endothelial cells is closely linked to the function of the vasculature as it regulates the release of vasoactive substances such as nitric oxide (NO) and reactive oxygen species. The outer layer of endothelial cells, consisting of the glycocalyx above and the cortical zone beneath the plasma membrane, is a vulnerable compartment able to adapt its nanomechanical properties to any changes of forces exerted by the adjacent blood stream. Sustained stiffening of this layer contributes to the development of endothelial dysfunction and vascular pathologies. Recent Advances: The development of specific techniques to quantify the mechanical properties of cells enables the detailed investigation of the mechanistic link between structure and function of cells. CRITICAL ISSUES Challenging the mechanical stiffness of cells, for instance, by inflammatory mediators can lead to the development of endothelial dysfunction. Prevention of sustained stiffening of the outer layer of endothelial cells in turn improves endothelial function. FUTURE DIRECTIONS The mechanical properties of cells can be used as critical marker and test system for the proper function of the vascular system. Pharmacological substances, which are able to improve endothelial nanomechanics and function, could take a new importance in the prevention and treatment of vascular diseases. Thus, detailed knowledge acquisition about the structure/function relationship of endothelial cells and the underlying signaling pathways should be promoted.
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Affiliation(s)
- Johannes Fels
- 1 Institute of Cell Dynamics and Imaging, University of Münster, Münster, Germany
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19
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Maase M, Rygula A, Pacia MZ, Proniewski B, Mateuszuk L, Sternak M, Kaczor A, Chlopicki S, Kusche-Vihrog K. Combined Raman- and AFM-based detection of biochemical and nanomechanical features of endothelial dysfunction in aorta isolated from ApoE/LDLR-/- mice. Nanomedicine 2018; 16:97-105. [PMID: 30550804 DOI: 10.1016/j.nano.2018.11.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/09/2018] [Accepted: 11/20/2018] [Indexed: 01/08/2023]
Abstract
Endothelial dysfunction is recognized as a critical condition in the development of cardiovascular disorders. This multifactorial process involves changes in the biochemical and mechanical properties of endothelial cells leading to disturbed release of vasoprotective mediators. Hypercholesterolemia and increased stiffness of the endothelial cortex are independently shown to result in reduced release of nitric oxide and thus endothelial dysfunction. However, direct evidence linking these parameters to each other is missing. Here, a novel method combining Raman spectroscopy for biochemical analysis and Atomic Force Microscopy (AFM) for analyzing the endothelial nanomechanics was established. Using this dual approach, the same areas of native ex vivo aortas were investigated, either derived from mice with endothelial dysfunction (ApoE/LDLR-/-) or wild type mice. In particular an increased intracellular lipid content and elevated cortical stiffness/elasticity were shown in ApoE/LDLR-/- aortas, demonstrating a direct link between endothelial dysfunction, the biochemical composition and the nanomechanical properties of endothelial cells.
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Affiliation(s)
- Martina Maase
- Institute of Physiology II, University of Münster, Robert-Koch Str. 27b, 48149 Münster, Germany
| | - Anna Rygula
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland
| | - Marta Z Pacia
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland; Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Bartosz Proniewski
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland
| | - Lukasz Mateuszuk
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland
| | - Magdalena Sternak
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland
| | - Agnieszka Kaczor
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland; Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Stefan Chlopicki
- Jagiellonian Centre for Experimental Therapeutics (JCET), Jagiellonian University, Bobrzynskiego 14, 30-348 Krakow, Poland; Chair of Pharmacology, Jagiellonian University, Grzegorzecka 16, 31-531 Krakow, Poland.
| | - Kristina Kusche-Vihrog
- Institute of Physiology II, University of Münster, Robert-Koch Str. 27b, 48149 Münster, Germany; Institute of Physiology, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany.
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20
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Wilck N, Bartolomaeus H, Balogh A, Yakoub M, Homann S, Markó L, Höges S, Tsvetkov D, Wundersitz S, Haase N, Hering L, Maase M, Kusche-Vihrog K, Grandoch M, Fielitz J, Kempa S, Forslund SK, Kushugulova A, Dechend R, Eckardt KU, Rump LC, Müller DN, Stegbauer J. Abstract 131: Microbiota-Derived Metabolite Propionate Protects From Hypertensive Cardiovascular Damage. Hypertension 2018. [DOI: 10.1161/hyp.72.suppl_1.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective:
Inflammation drives cardiovascular disease, anti-inflammatory approaches may be beneficial. Short-chain fatty acids (SCFA) are bacterial metabolites with anti-inflammatory properties affecting host immune homeostasis including regulatory T cells (Treg). We investigated effects of the SCFA propionate (administered in drinking water, NaCl as control) in two mouse models, namely hypertensive heart disease (wild-type NMRI (WT), angiotensin (Ang)II infusion 1.44 mg/kg/d s.c. for 14 days) and atherosclerosis (Apolipoprotein E knockout (ApoE), AngII infusion 0.72 mg/kg/d s.c. for 28 days), respectively.
Results:
Propionate attenuated cardiac hypertrophy and fibrosis in both models significantly. Susceptibility to cardiac ventricular arrhythmias was significantly reduced in propionate-treated WT mice. Aortic atherosclerotic lesion area was significantly reduced in propionate-treated ApoE (27.6±8 vs. 7.9±2.4%). Treatment reduced splenic effector memory (CD4+ CD44+ CD62L-) T cell frequencies (WT: 30.5±4.6 vs. 19.1±1.6; ApoE: 41.1±3.1 vs. 32.7±1.4%) and splenic Th17 cells (WT: 1.0±0.2 vs. 0.6±0.1; ApoE: 1.3±0.1 vs. 0.9±0.1%) in both models, indicating beneficial effects on systemic inflammation. Similarly, propionate reduced cardiac immune cell infiltration (CD4+, CD8+, F4/80+) in WT mice. Propionate improved vascular dysfunction and moderately reduced blood pressure in both models. Organ-protective actions of propionate (cardiac inflammation and fibrosis) were abrogated in Treg-depleted (antiCD25-treated) AngII-infused WT mice, suggesting a central role for Treg. To verify our findings in a human cohort, we re-analyzed clinical and metagenomic data from a recent randomized controlled trial investigating the effect of a 90-day synbiotic intervention in 84 subjects with metabolic syndrome including healthy controls. Interestingly, in synbiotic-treated subjects an increased capacity for SFCA production was significantly correlated to blood pressure reduction.
Conclusion:
Data underscore the importance of SCFA for cardiovascular health and suggest that lifestyle modifications leading to augmented SCFA production could be a beneficial non-pharmacological add-on strategy for cardiovascular disease.
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Affiliation(s)
| | | | | | - Mina Yakoub
- Dept of Nephrology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
| | - Susanne Homann
- Institute of Pharmacology and Clinical Pharmacology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
| | | | - Sascha Höges
- Dept of Nephrology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
| | | | | | | | - Lydia Hering
- Dept of Nephrology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
| | - Martina Maase
- Institute of Physiology II, Univ of Münster, Münster, Germany
| | | | - Maria Grandoch
- Institute of Pharmacology and Clinical Pharmacology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
| | | | | | | | | | | | - Kai-Uwe Eckardt
- Charité Univ Medicine, Div of Nephrology and Internal Intensive Care Medicine, Berlin, Germany
| | - Lars C Rump
- Dept of Nephrology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
| | | | - Johannes Stegbauer
- Dept of Nephrology, Univ Hosp Düsseldorf, Heinrich-Heine-Univ Düsseldorf, Düsseldorf, Germany
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21
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Krämer BK, Hausberg M, Sanner B, Kusche-Vihrog K, Weil J, Weisser B, Wenzel U, Trenkwalder P. [Blood Pressure Measurement and Treatment Targets: Position Paper of the DHL® Task Force Scientific Statements and Guidelines]. Dtsch Med Wochenschr 2017; 142:1446-1447. [PMID: 28873492 DOI: 10.1055/s-0043-117070] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Lukasz A, Hillgruber C, Oberleithner H, Kusche-Vihrog K, Pavenstädt H, Rovas A, Hesse B, Goerge T, Kümpers P. Endothelial glycocalyx breakdown is mediated by angiopoietin-2. Cardiovasc Res 2017; 113:671-680. [PMID: 28453727 DOI: 10.1093/cvr/cvx023] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [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: 08/01/2016] [Accepted: 01/31/2017] [Indexed: 01/01/2023] Open
Abstract
AIMS The endothelial glycocalyx (eGC), a carbohydrate-rich layer lining the luminal surface of the endothelium, provides a first vasoprotective barrier against vascular leakage and adhesion in sepsis and vessel inflammation. Angiopoietin-2 (Angpt-2), an antagonist of the endothelium-stabilizing receptor Tie2 secreted by endothelial cells, promotes vascular permeability through cellular contraction and junctional disintegration. We hypothesized that Angpt-2 might also mediate the breakdown of the eGC. METHODS AND RESULTS Using confocal and atomic force microscopy, we show that exogenous Angpt-2 induces a rapid loss of the eGC in endothelial cells in vitro. Glycocalyx deterioration involves the specific loss of its main constituent heparan sulphate, paralleled by the secretion of the heparan sulphate-specific heparanase from late endosomal/lysosomal stores. Corresponding in vivo experiments revealed that exogenous Angpt-2 leads to heparanase-dependent eGC breakdown, which contributes to plasma leakage and leukocyte recruitment in vivo. CONCLUSION Our data indicate that eGC breakdown is mediated by Angpt-2 in a non-redundant manner.
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Affiliation(s)
- Alexander Lukasz
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
- Institute of Physiology II, University Hospital Münster, Robert-Koch-Straße 27b, 48149 Münster, Germany
| | - Carina Hillgruber
- Department of Dermatology, University Hospital Münster, Von-Esmarch-Straße 58, 48149 Münster, Germany
| | - Hans Oberleithner
- Institute of Physiology II, University Hospital Münster, Robert-Koch-Straße 27b, 48149 Münster, Germany
| | - Kristina Kusche-Vihrog
- Institute of Physiology II, University Hospital Münster, Robert-Koch-Straße 27b, 48149 Münster, Germany
| | - Hermann Pavenstädt
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
| | - Alexandros Rovas
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
| | - Bettina Hesse
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
- Institute of Physiology II, University Hospital Münster, Robert-Koch-Straße 27b, 48149 Münster, Germany
| | - Tobias Goerge
- Department of Dermatology, University Hospital Münster, Von-Esmarch-Straße 58, 48149 Münster, Germany
| | - Philipp Kümpers
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Albert-Schweitzer-Campus 1, 48149 Münster, Germany
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Lukasz A, Hillgruber C, Oberleithner H, Hesse B, Kusche-Vihrog K, Pavenstädt H, Görge T, Kümpers P. MP237ENZYMATIC DIGESTION OF THE ENDOTHELIAL GLYCOCALYX IS REGULATED BY THE TIE2 RECEPTOR AND ITS LIGANDS ANGIOPOIETIN-1 AND -2. Nephrol Dial Transplant 2017. [DOI: 10.1093/ndt/gfx166.mp237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Schierke F, Wyrwoll MJ, Wisdorf M, Niedzielski L, Maase M, Ruck T, Meuth SG, Kusche-Vihrog K. Nanomechanics of the endothelial glycocalyx contribute to Na +-induced vascular inflammation. Sci Rep 2017; 7:46476. [PMID: 28406245 PMCID: PMC5390251 DOI: 10.1038/srep46476] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 03/20/2017] [Indexed: 12/11/2022] Open
Abstract
High dietary salt (NaCl) is a known risk factor for cardiovascular pathologies and inflammation. High plasma Na+ concentrations (high Na+) have been shown to stiffen the endothelial cortex and decrease nitric oxide (NO) release, a hallmark of endothelial dysfunction. Here we report that chronic high Na+ damages the endothelial glycocalyx (eGC), induces release of inflammatory cytokines from the endothelium and promotes monocyte adhesion. Single cell force spectroscopy reveals that high Na+ enhances vascular adhesion protein-1 (VCAM-1)-dependent adhesion forces between monocytes and endothelial surface, giving rise to increased numbers of adherent monocytes on the endothelial surface. Mineralocorticoid receptor antagonism with spironolactone prevents high Na+-induced eGC deterioration, decreases monocyte-endothelium interactions, and restores endothelial function, indicated by increased release of NO. Whereas high Na+ decreases NO release, it induces endothelial release of the pro-inflammatory cytokines IL-1ß and TNFα. However, in contrast to chronic salt load (hours), in vivo and in vitro, an acute salt challenge (minutes) does not impair eGC function. This study identifies the eGC as important mediator of inflammatory processes and might further explain how dietary salt contributes to endothelialitis and cardiovascular pathologies by linking endothelial nanomechanics with vascular inflammation.
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Affiliation(s)
- Florian Schierke
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Margot J Wyrwoll
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Martin Wisdorf
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Leon Niedzielski
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Martina Maase
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Tobias Ruck
- Department of Neurology, University of Münster, 48149 Münster, Germany
| | - Sven G Meuth
- Department of Neurology, University of Münster, 48149 Münster, Germany
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25
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Lukasz A, Hillgruber C, Oberleither H, Kusche-Vihrog K, Rübig E, Pavenstädt H, Goerge T, Kümpers P. SP178ANGIOPOIETIN-2 MEDIATES BREAKDOWN OF THE ENDOTHELIAL GLYCOCALYX. Nephrol Dial Transplant 2016. [DOI: 10.1093/ndt/gfw161.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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26
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Abstract
Negative charges in the glycocalyx of red blood cells (RBC) and vascular endothelial cells (EC) facilitate frictionless blood flow through blood vessels. Na+ selectively shields these charges controlling surface electronegativity. The question was addressed whether the ambient Na+ concentration controls RBC-EC interaction. Using atomic force microscopy (AFM) adhesion forces between RBC and endothelial glycocalyx were quantified. A single RBC, mounted on an AFM cantilever, was brought in physical contact with the endothelial surface and then pulled off. Adhesion forces were quantified (i) after enzymatic removal of negative charges in the glycocalyx, (ii) under different ambient Na+ and (iii) after applying the intracellular aldosterone receptor antagonist spironolactone. Removal of negative surface charges increases RBC-EC interaction forces. A stepwise increase of ambient Na+ from 133 to 140 mM does not affect them. However, beyond 140 mM Na+ adhesion forces increase sharply (10% increase of adhesion force per 1 mM increase of Na+). Spironolactone prevents this response. It is concluded that negative charges reduce adhesion between RBC and EC. Ambient Na+ concentration determines the availability of free negative charges. Na+ concentrations in the low physiological range (below 140 mM) allow sufficient amounts of vacant negative charges so that adhesion of RBC to the endothelial surface is small. In contrast, Na+ in the high physiological range (beyond 140 mM) saturates the remaining negative surface charges thus increasing adhesion. Aldosterone receptor blockade by spironolactone prevents Na+ induced RBC adhesion to the endothelial glycocalyx. Extrapolation of in vitro experiments to in vivo conditions leads to the hypothesis that high sodium intake is likely to increase the incidence of thrombotic events.
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Affiliation(s)
- Hans Oberleithner
- Medical Faculty, Institute of Physiology II, University of Münster Münster, Germany
| | - Mike Wälte
- Medical Faculty, Institute of Physiology II, University of Münster Münster, Germany
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27
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Peters W, Kusche-Vihrog K, Oberleithner H, Schillers H. Cystic fibrosis transmembrane conductance regulator is involved in polyphenol-induced swelling of the endothelial glycocalyx. Nanomedicine 2015; 11:1521-30. [PMID: 25881741 DOI: 10.1016/j.nano.2015.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/15/2015] [Accepted: 03/23/2015] [Indexed: 12/21/2022]
Abstract
UNLABELLED Previous studies show that polyphenol-rich compounds can induce a swelling of the endothelial glycocalyx (eGC). Our goal was to reveal the mechanism behind the eGC-swelling. As polyphenols are potent modulators of fibrosis transmembrane conductance regulator (CFTR) Cl(-) channel, the hypothesis was tested whether polyphenol-induced increase in CFTR activity is responsible for the eGC-swelling. The impact of the polyphenols resveratrol, (-)-epicatechin, and quercetin on nanomechanics of living endothelial GM7373 cells was monitored by AFM-nanoindentation. The tested polyphenols lead to eGC-swelling with a simultaneous decrease in cortical stiffness. EGC-swelling, but not the change in cortical stiffness, was prevented by the inhibition of CFTR. Polyphenol-induced eGC-swelling could be mimicked by cytochalasin D, an actin-depolymerizing agent. Thus, in the vascular endothelium, polyphenols induce eGC-swelling by softening cortical actin and activating CFTR. Our findings imply that CFTR plays an important role in the maintenance of vascular homeostasis and may explain the vasoprotective properties of polyphenols. FROM THE CLINICAL EDITOR Many vascular problems clinically can be attributed to a dysregulation of endothelial glycocalyx (eGC). The underlying mechanism however remains unclear. In this article, the authors used nanoindentation and showed that polyphenols could swell the endothelial glycocalyx and alter its function. This investigative method can lead to further mechanistic studies of other molecular pathways.
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Affiliation(s)
- Wladimir Peters
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | | | - Hermann Schillers
- Institute of Physiology II, University of Münster, Münster, Germany.
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Kusche-Vihrog K, Schmitz B, Brand E. Salt controls endothelial and vascular phenotype. Pflugers Arch 2014; 467:499-512. [DOI: 10.1007/s00424-014-1657-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 11/11/2014] [Accepted: 11/14/2014] [Indexed: 01/11/2023]
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Molenda N, Urbanova K, Weiser N, Kusche-Vihrog K, Günzel D, Schillers H. Paracellular transport through healthy and cystic fibrosis bronchial epithelial cell lines--do we have a proper model? PLoS One 2014; 9:e100621. [PMID: 24945658 PMCID: PMC4063962 DOI: 10.1371/journal.pone.0100621] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 05/29/2014] [Indexed: 11/18/2022] Open
Abstract
It has been reported recently that the cystic fibrosis transmembrane conductance regulator (CFTR) besides transcellular chloride transport, also controls the paracellular permeability of bronchial epithelium. The aim of this study was to test whether overexpressing wtCFTR solely regulates paracellular permeability of cell monolayers. To answer this question we used a CFBE41o- cell line transfected with wtCFTR or mutant F508del-CFTR and compered them with parental line and healthy 16HBE14o- cells. Transepithelial electrical resistance (TER) and paracellular fluorescein flux were measured under control and CFTR-stimulating conditions. CFTR stimulation significant decreased TER in 16HBE14o- and also in CFBE41o- cells transfected with wtCFTR. In contrast, TER increased upon stimulation in CFBE41o- cells and CFBE41o- cells transfected with F508del-CFTR. Under non-stimulated conditions, all four cell lines had similar paracellular fluorescein flux. Stimulation increased only the paracellular permeability of the 16HBE14o- cell monolayers. We observed that 16HBE14o- cells were significantly smaller and showed a different structure of cell-cell contacts than CFBE41o- and its overexpressing clones. Consequently, 16HBE14o- cells have about 80% more cell-cell contacts through which electrical current and solutes can leak. Also tight junction protein composition is different in 'healthy' 16HBE14o- cells compared to 'cystic fibrosis' CFBE41o- cells. We found that claudin-3 expression was considerably stronger in 16HBE14o- cells than in the three CFBE41o- cell clones and thus independent of the presence of functional CFTR. Together, CFBE41o- cell line transfection with wtCFTR modifies transcellular conductance, but not the paracellular permeability. We conclude that CFTR overexpression is not sufficient to fully reconstitute transport in CF bronchial epithelium. Hence, it is not recommended to use those cell lines to study CFTR-dependent epithelial transport.
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Affiliation(s)
- Natalia Molenda
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | - Nelly Weiser
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | - Dorothee Günzel
- Institute of Clinical Physiology, Charité Campus Benjamin Franklin, Berlin, Germany
| | - Hermann Schillers
- Institute of Physiology II, University of Münster, Münster, Germany
- * E-mail:
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Abstract
The epithelial sodium channel is also expressed in vascular endothelium (endothelial sodium channel [EnNaC]). Depending on ambient sodium concentration, EnNaC is associated with mechanical stiffening of the endothelial cell cortex, leading to endothelial dysfunction. Because the incidence of both salt sensitivity and endothelial dysfunction increases with age, we investigated the abundance of EnNaC in aging mice. To assess EnNaC functionality and endothelial salt sensitivity, stiffness was measured while ambient sodium was varied. Aortae of young (3 months) and old (15 months) C57BL/6J wild-type mice were kept ex vivo on a physiological concentration of aldosterone (0.45 nmol/L). Spironolactone (10 nmol/L) and amiloride (1 μmol/L) were applied for aldosterone antagonism and EnNaC blockage, respectively. EnNaC at the endothelial cell surface was quantified by immunofluorescence staining. Cortical stiffness was monitored by atomic force microscopy when ambient sodium was raised from 135 to 150 mmol/L. In ex vivo aortae of older mice, endothelial cells had significantly higher EnNaC numbers than those of younger mice (+23%). In parallel, cortical stiffness was found increased (+8.5%). Acute application of high sodium led to an immediate rise in stiffness in both groups but was pronounced in endothelium of older mice (+18% versus +26%). Spironolactone and amiloride lowered EnNaC abundance and prevented endothelial stiffening under all conditions. We conclude that EnNaC mediates endothelial salt sensitivity in the aging process. This mechanism might contribute to the development of age-related cardiovascular disease and suggests the usage of spironolactone and amiloride specifically in the elderly.
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Affiliation(s)
- Moritz Paar
- From the Institute of Physiology II (M.P., K.K.-V., V.D., H.O.) and Department of Internal Medicine D (H.P., K.K.), University Hospital of Münster, Münster, Germany
| | - Hermann Pavenstädt
- From the Institute of Physiology II (M.P., K.K.-V., V.D., H.O.) and Department of Internal Medicine D (H.P., K.K.), University Hospital of Münster, Münster, Germany
| | - Kristina Kusche-Vihrog
- From the Institute of Physiology II (M.P., K.K.-V., V.D., H.O.) and Department of Internal Medicine D (H.P., K.K.), University Hospital of Münster, Münster, Germany
| | - Verena Drüppel
- From the Institute of Physiology II (M.P., K.K.-V., V.D., H.O.) and Department of Internal Medicine D (H.P., K.K.), University Hospital of Münster, Münster, Germany
| | - Hans Oberleithner
- From the Institute of Physiology II (M.P., K.K.-V., V.D., H.O.) and Department of Internal Medicine D (H.P., K.K.), University Hospital of Münster, Münster, Germany
| | - Katrin Kliche
- From the Institute of Physiology II (M.P., K.K.-V., V.D., H.O.) and Department of Internal Medicine D (H.P., K.K.), University Hospital of Münster, Münster, Germany.
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Korte S, Sträter AS, Drüppel V, Oberleithner H, Jeggle P, Grossmann C, Fobker M, Nofer JR, Brand E, Kusche-Vihrog K. Feedforward activation of endothelial ENaC by high sodium. FASEB J 2014; 28:4015-25. [PMID: 24868010 DOI: 10.1096/fj.14-250282] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [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: 02/04/2014] [Accepted: 05/19/2014] [Indexed: 01/11/2023]
Abstract
Kidney epithelial sodium channels (ENaCs) are known to be inactivated by high sodium concentrations (feedback inhibition). Recently, the endothelial sodium channel (EnNaC) was identified to control the nanomechanical properties of the endothelium. EnNaC-dependent endothelial stiffening reduces the release of nitric oxide, the hallmark of endothelial dysfunction. To study the regulatory impact of sodium on EnNaC, endothelial cells (EA.hy926 and ex vivo mouse endothelium) were incubated in aldosterone-free solutions containing either low (130 mM) or high (150 mM) sodium concentrations. By applying atomic force microscopy-based nanoindentation, an unexpected positive correlation between increasing sodium concentrations and cortical endothelial stiffness was observed, which can be attributed to functional EnNaC. In particular, an acute rise in sodium concentration (+20 mM) was sufficient to increase EnNaC membrane abundance by 90% and stiffening of the endothelial cortex by 18%. Despite the absence of exogenous aldosterone, these effects were prevented by the aldosterone synthase inhibitor FAD286 (100 nM) or the mineralocorticoid receptor (MR)-antagonist spironolactone (100 nM), indicating endogenous aldosterone synthesis and MR-dependent signaling. Interestingly, in the presence of high-sodium concentrations, FAD286 increased the transcription of the MR by 69%. Taken together, a novel feedforward activation of EnNaC by sodium is proposed that contrasts ENaC feedback inhibition in kidney.
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Affiliation(s)
- Stefanie Korte
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | - Verena Drüppel
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | - Pia Jeggle
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Claudia Grossmann
- Julius-Bernstein-Institute of Physiology, University Halle-Wittenberg, Halle, Germany
| | - Manfred Fobker
- Center of Laboratory Medicine, University of Münster, Münster, Germany; and
| | - Jerzy-Roch Nofer
- Center of Laboratory Medicine, University of Münster, Münster, Germany; and
| | - Eva Brand
- Internal Medicine D, Department of Nephrology, Hypertension and Rheumatology, University Hospital Muenster, Muenster, Germany
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Schmitz B, Nedele J, Guske K, Maase M, Lenders M, Schelleckes M, Kusche-Vihrog K, Brand SM, Brand E. Soluble Adenylyl Cyclase in Vascular Endothelium. Hypertension 2014; 63:753-61. [DOI: 10.1161/hypertensionaha.113.02061] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The Ca
2+
- and bicarbonate-activated soluble adenylyl cyclase (sAC) has been identified recently as an important mediator of aldosterone signaling in the kidney. Nuclear sAC has been reported to stimulate cAMP response element–binding protein 1 phosphorylation via protein kinase A, suggesting an alternative cAMP pathway in the nucleus. In this study, we analyzed the sAC as a potential modulator of endothelial stiffness in the vascular endothelium. We determined the contribution of sAC to cAMP response element–mediated transcriptional activation in vascular endothelial cells and kidney collecting duct cells. Inhibition of sAC by the specific inhibitor KH7 significantly reduced cAMP response element–mediated promoter activity and affected cAMP response element–binding protein 1 phosphorylation. Furthermore, KH7 and anti-sAC small interfering RNA significantly decreased mRNA and protein levels of epithelial sodium channel-α and Na
+
/K
+
-ATPase-α. Using atomic force microscopy, a nano-technique that measures stiffness and deformability of living cells, we detected significant endothelial cell softening after sAC inhibition. Our results suggest that the sAC is a regulator of gene expression involved in aldosterone signaling and an important regulator of endothelial stiffness. Additional studies are warranted to investigate the protective action of sAC inhibitors in humans for potential clinical use.
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Affiliation(s)
- Boris Schmitz
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Johanna Nedele
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Katrin Guske
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Martina Maase
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Malte Lenders
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Michael Schelleckes
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Kristina Kusche-Vihrog
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Stefan-Martin Brand
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
| | - Eva Brand
- From Internal Medicine D, Department of Nephrology, Hypertension, and Rheumatology (B.S., J.N., K.G., M.L., M.S., E.B.) and Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease (B.S., S.-M.B.), University Hospital Muenster, Muenster, Germany; and Institute of Physiology II, University of Muenster, Muenster, Germany (M.M., K.K.-V.)
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Warnock DG, Kusche-Vihrog K, Tarjus A, Sheng S, Oberleithner H, Kleyman TR, Jaisser F. Blood pressure and amiloride-sensitive sodium channels in vascular and renal cells. Nat Rev Nephrol 2014; 10:146-57. [PMID: 24419567 DOI: 10.1038/nrneph.2013.275] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Sodium transport in the distal nephron is mediated by epithelial sodium channel activity. Proteolytic processing of external domains and inhibition with increased sodium concentrations are important regulatory features of epithelial sodium channel complexes expressed in the distal nephron. By contrast, sodium channels expressed in the vascular system are activated by increased external sodium concentrations, which results in changes in the mechanical properties and function of endothelial cells. Mechanosensitivity and shear stress affect both epithelial and vascular sodium channel activity. Guyton's hypothesis stated that blood pressure control is critically dependent on vascular tone and fluid handling by the kidney. The synergistic effects, and complementary regulation, of the epithelial and vascular systems are consistent with the Guytonian model of volume and blood pressure regulation, and probably reflect sequential evolution of the two systems. The integration of vascular tone, renal perfusion and regulation of renal sodium reabsorption is the central underpinning of the Guytonian model. In this Review, we focus on the expression and regulation of sodium channels, and we outline the emerging evidence that describes the central role of amiloride-sensitive sodium channels in the efferent (vascular) and afferent (epithelial) arms of this homeostatic system.
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Affiliation(s)
- David G Warnock
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, 1720 2nd Avenue South, Birmingham, AL 34294-0007, USA
| | - Kristina Kusche-Vihrog
- Institut für Physiologie II, Westfälische Wilhelms Universität, Robert-Koch-Straße 27, 48149 Münster, Germany
| | - Antoine Tarjus
- INSERM U872 Team 1, Centre de Recherche des Cordeliers, Université René Descartes, Université Pierre et Marie Curie, 15 rue de l'Ecole de Médecine, 75006 Paris, France
| | - Shaohu Sheng
- Renal and Electrolyte Division, Department of Medicine, University of Pittsburgh, 3550 Terrace Street, Pittsburgh, PA 15261, USA
| | - Hans Oberleithner
- Institut für Physiologie II, Westfälische Wilhelms Universität, Robert-Koch-Straße 27, 48149 Münster, Germany
| | - Thomas R Kleyman
- Renal and Electrolyte Division, Department of Medicine, University of Pittsburgh, 3550 Terrace Street, Pittsburgh, PA 15261, USA
| | - Frederic Jaisser
- INSERM U872 Team 1, Centre de Recherche des Cordeliers, Université René Descartes, Université Pierre et Marie Curie, 15 rue de l'Ecole de Médecine, 75006 Paris, France
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Kusche-Vihrog K, Jeggle P, Oberleithner H. The role of ENaC in vascular endothelium. Pflugers Arch 2013; 466:851-9. [PMID: 24046153 DOI: 10.1007/s00424-013-1356-3] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/09/2013] [Accepted: 09/09/2013] [Indexed: 12/31/2022]
Abstract
Once upon a time, the expression of the epithelial sodium channel (ENaC) was mainly assigned to the kidneys, colon and sweat glands where it was considered to be the main determinant of sodium homeostasis. Recent, though indirect, evidence for the possible existence of ENaC in a non-epithelial tissue was derived from the observation that the vascular endothelium is a target for aldosterone. Inhibitory actions of the intracellular aldosterone receptors by spironolactone and, more directly, by ENaC blockers such as amiloride supported this view. Shortly after, direct data on the expression of ENaC in vascular endothelium could be demonstrated. There, endothelial ENaC (EnNaC) could be defined as a major regulator of cellular mechanics which is a critical parameter in differentiating between vascular function and dysfunction. Foremost, the mechanical stiffness of the endothelial cell cortex, a layer 50-200 nm beneath the plasma membrane, has been shown to play a crucial role as it controls the production of the endothelium-derived vasodilator nitric oxide (NO) which directly affects the tone of the vascular smooth muscle cells. In contrast to soft endothelial cells, stiff endothelial cells release reduced amounts of NO, the hallmark of endothelial dysfunction. Thus, the combination of endothelial stiffness and myogenic tone might increase the peripheral vascular resistance. An elevation of arterial blood pressure is supposed to be the consequence of such functional changes. In this review, EnNaC is discussed as an aldosterone-regulated plasma membrane protein of the vascular endothelium that could significantly contribute to maintaining of an appropriate arterial blood pressure but, if overexpressed, could participate in the pathogenesis of arterial hypertension.
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Affiliation(s)
- Kristina Kusche-Vihrog
- Institute of Physiology II, University of Münster, Robert-Koch-Str. 27b, 48149, Münster, Germany,
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Drüppel V, Kusche-Vihrog K, Grossmann C, Gekle M, Kasprzak B, Brand E, Pavenstädt H, Oberleithner H, Kliche K. Long-term application of the aldosterone antagonist spironolactone prevents stiff endothelial cell syndrome. FASEB J 2013; 27:3652-9. [PMID: 23729588 DOI: 10.1096/fj.13-228312] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Aldosterone triggers the stiff endothelial cell syndrome (SECS), characterized by an up-regulation of epithelial sodium channels (ENaCs) and mechanical stiffening of the endothelial cell cortex accompanied by endothelial dysfunction. In vivo, aldosterone antagonism exerts sustained protection on the cardiovascular system. To illuminate the molecular mechanisms of this time-dependent effect, a study on endothelial cells in vitro and ex vivo was designed to investigate SECS over time. Endothelia (from human umbilical veins, bovine aortae, and explants of human arteries) were cultured in aldosterone-supplemented medium with or without the mineralocorticoid receptor (MR) antagonist spironolactone. MR expression, ENaC expression, cortical stiffness, and shear-mediated nitric oxide (NO) release were determined after 3 d (short term) and up to 24 d (long term). Over time, MR expression increased by 129%. ENaC expression and surface abundance increased by 32% and 42% (13.8 to 19.6 molecules per cell surface), paralleled by a 49% rise in stiffness. Spironolactone prevented this development and, after 3 wk of treatment, increased NO release by 50%. Thus, spironolactone improves endothelial function long-lastingly by preventing a time-dependent manifestation of SECS. This emphasizes the key role of vascular endothelium as a therapeutical target in cardiovascular disorders and might explain blood pressure independent actions of MR antagonism.
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Affiliation(s)
- Verena Drüppel
- Institute of Physiology II, University of Münster, Münster, Germany
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Jeggle P, Callies C, Tarjus A, Fassot C, Fels J, Oberleithner H, Jaisser F, Kusche-Vihrog K. Epithelial sodium channel stiffens the vascular endothelium in vitro and in Liddle mice. Hypertension 2013; 61:1053-9. [PMID: 23460285 DOI: 10.1161/hypertensionaha.111.199455] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Liddle syndrome, an inherited form of hypertension, is caused by gain-of-function mutations in the epithelial Na(+) channel (ENaC), the principal mediator of Na(+) reabsorption in the kidney. Accordingly, the disease pathology was ascribed to a primary renal mechanism. Whether this is the sole responsible mechanism, however, remains uncertain as dysregulation of ENaC in other tissues may also be involved. Previous work indicates that ENaC in the vascular endothelium is crucial for the regulation of cellular mechanics and thus vascular function. The hormone aldosterone has been shown to concomitantly increase ENaC surface expression and stiffness of the cell cortex in vascular endothelial cells. The latter entails a reduced release of the vasodilator nitric oxide, which eventually leads to an increase in vascular tone and blood pressure. Using atomic force microscopy, we have found a direct correlation between ENaC surface expression and the formation of cortical stiffness in endothelial cells. Stable knockdown of αENaC in endothelial cells evoked a reduced channel surface density and a lower cortical stiffness compared with the mock control. In turn, an increased αENaC expression induced an elevated cortical stiffness. More importantly, using ex vivo preparations from a mouse model for Liddle syndrome, we show that this disorder evokes enhanced ENaC expression and increased cortical stiffness in vascular endothelial cells in situ. We conclude that ENaC in the vascular endothelium determines cellular mechanics and hence might participate in the control of vascular function.
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Affiliation(s)
- Pia Jeggle
- Institute of Physiology II, University of Muenster, Muenster, Germany
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37
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Abstract
Excessive amounts of salt in food, as usually consumed worldwide, affect the vascular system, leading to high blood pressure and premature disabilities. Salt entering the vascular bed after a salty meal is transiently bound to the endothelial glycocalyx, a negatively charged biopolymer lining the inner surface of the blood vessels. This barrier protects the endothelium against salt overload. A poorly-developed glycocalyx increases the salt permeability of the vascular system and the amount of salt being deposited in the body, which affects organ function. A simple test system is now available that evaluates vascular salt sensitivity in humans and identifies individuals who are at risk of salt-induced hypertension. This short review aims to discuss how the underlying basic research can be translated into medical practice and, thus, meaningful health outcomes.
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Affiliation(s)
- Kristina Kusche-Vihrog
- Institute of Physiology II, Medical Faculty, University of Münster Robert-Koch-Strasse 27, 48149 Münster Germany
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Fels J, Jeggle P, Kusche-Vihrog K, Oberleithner H. Cortical actin nanodynamics determines nitric oxide release in vascular endothelium. PLoS One 2012; 7:e41520. [PMID: 22844486 PMCID: PMC3402397 DOI: 10.1371/journal.pone.0041520] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 06/21/2012] [Indexed: 02/05/2023] Open
Abstract
The release of the main vasodilator nitric oxide (NO) by the endothelial NO synthase (eNOS) is a hallmark of endothelial function. We aim at elucidating the underlying mechanism how eNOS activity depends on cortical stiffness (К(cortex)) of living endothelial cells. It is hypothesized that cortical actin dynamics determines К(cortex) and directly influences eNOS activity. By combined atomic force microscopy and fluorescence imaging we generated mechanical and optical sections of single living cells. This approach allows the discrimination between К(cortex) and bulk cell stiffness (К(bulk)) and, additionally, the simultaneous analysis of submembranous actin web dynamics. We show that К(cortex) softens when cortical F-actin depolymerizes and that this shift from a gel-like stiff cortex to a soft G-actin rich layer, triggers the stiffness-sensitive eNOS activity. The results implicate that stiffness changes in the ∼100 nm phase of the submembranous actin web, without affecting К(bulk), regulate NO release and thus determines endothelial function.
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Affiliation(s)
- Johannes Fels
- Institute of Physiology II, University of Muenster, Muenster, Germany.
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Peters W, Drüppel V, Kusche-Vihrog K, Schubert C, Oberleithner H. Nanomechanics and sodium permeability of endothelial surface layer modulated by hawthorn extract WS 1442. PLoS One 2012; 7:e29972. [PMID: 22253842 PMCID: PMC3254622 DOI: 10.1371/journal.pone.0029972] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Accepted: 12/09/2011] [Indexed: 12/12/2022] Open
Abstract
The endothelial glycocalyx (eGC) plays a pivotal role in the physiology of the vasculature. By binding plasma proteins, the eGC forms the endothelial surface layer (ESL) which acts as an interface between bloodstream and endothelial cell surface. The functions of the eGC include mechanosensing of blood flow induced shear stress and thus flow dependent vasodilation. There are indications that levels of plasma sodium concentrations in the upper range of normal and beyond impair flow dependent regulation of blood pressure and may therefore increase the risk for hypertension. Substances, therefore, that prevent sodium induced endothelial dysfunction may be attractive for the treatment of cardiovascular disease. By means of combined atomic force - epifluorescence microscopy we studied the impact of the hawthorn (Crataegus spp.) extract WS 1442, a herbal therapeutic with unknown mechanism of action, on the mechanics of the ESL of ex vivo murine aortae. Furthermore, we measured the impact of WS 1442 on the sodium permeability of endothelial EA.hy 926 cell monolayer. The data show that (i) the ESL contributes by about 11% to the total endothelial barrier resistance for sodium and (ii) WS 1442 strengthens the ESL resistance for sodium up to about 45%. This mechanism may explain some of the vasoprotective actions of this herbal therapeutic.
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Affiliation(s)
- Wladimir Peters
- Institute of Physiology II, University of Münster, Münster, Germany.
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Korte S, Wiesinger A, Straeter AS, Peters W, Oberleithner H, Kusche-Vihrog K. Firewall function of the endothelial glycocalyx in the regulation of sodium homeostasis. Pflugers Arch 2011; 463:269-78. [PMID: 22057584 DOI: 10.1007/s00424-011-1038-y] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 09/30/2011] [Accepted: 10/03/2011] [Indexed: 12/15/2022]
Abstract
Plasma sodium, slightly above normal and in presence of aldosterone, stiffens vascular endothelium and reduces nitric oxide release with the consequence of endothelial dysfunction. This process is mediated by epithelial sodium channels (ENaC) and, most likely, the endothelial Na(+)/K(+)-ATPase. Both, ENaC and Na(+)/K(+)-ATPase, are located in the plasma membrane of endothelial cells and embedded in the endothelial glycocalyx (eGC). This negatively charged biopolymer is directly exposed to the blood stream and selectively buffers sodium ions. We hypothesize that the glycocalyx could interfere with endothelial sodium transport when extracellular sodium varies in the physiological range. Therefore, we modeled the endothelial cell as a pump-leak system measuring changes of intracellular sodium in cultured human endothelial cells. Experiments were performed under low/high extracellular sodium conditions before and after enzymatic eGC removal, and with inhibition of Na(+)/K(+)-ATPase and ENaC, respectively. Three major observations were made: (1) eGC removal by heparinase treatment facilitates sodium to enter/exit the endothelial cells. (2) The direction of net sodium movement across the endothelial plasma membrane depends on the concentration of extracellular sodium which regulates both the Na(+)/K(+)-ATPase and ENaC activity. (3) Removal of eGC and inhibition of sodium transport modify the electrical resistance of endothelial cells. We conclude that the eGC serves as a potential "firewall" preventing uncontrolled access of sodium to the pump-leak system of the endothelial cell. After eGC removal, sodium access to the system is facilitated. Thus the pump-leak system could be regulated by ambient sodium and control vascular permeability in pathophysiological conditions.
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Affiliation(s)
- Stefanie Korte
- Institute of Physiology II, University of Muenster, Robert-Koch-Strasse 27 b, 48149, Münster, Germany
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Oberleithner H, Peters W, Kusche-Vihrog K, Korte S, Schillers H, Kliche K, Oberleithner K. Salt overload damages the glycocalyx sodium barrier of vascular endothelium. Pflugers Arch 2011; 462:519-28. [PMID: 21796337 PMCID: PMC3170475 DOI: 10.1007/s00424-011-0999-1] [Citation(s) in RCA: 172] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2011] [Accepted: 07/16/2011] [Indexed: 01/05/2023]
Abstract
Sodium overload stiffens vascular endothelial cells in vitro and promotes arterial hypertension in vivo. The hypothesis was tested that the endothelial glycocalyx (eGC), a mesh of anionic biopolymers covering the surface of the endothelium, participates in the stiffening process. By using a mechanical nanosensor, mounted on an atomic force microscope, height (∼400 nm) and stiffness (∼0.25 pN/nm) of the eGC on the luminal endothelial surface of split-open human umbilical arteries were quantified. In presence of aldosterone, the increase of extracellular sodium concentration from 135 to 150 mM over 5 days (sodium overload) led the eGC shrink by ∼50% and stiffening by ∼130%. Quantitative eGC analyses reveal that sodium overload caused a reduction of heparan sulphate residues by 68% which lead to destabilization and collapse of the eGC. Sodium overload transformed the endothelial cells from a sodium release into a sodium-absorbing state. Spironolactone, a specific aldosterone antagonist, prevented these changes. We conclude that the endothelial glycocalyx serves as an effective buffer barrier for sodium. Damaged eGC facilitates sodium entry into the endothelial cells. This could explain endothelial dysfunction and arterial hypertension observed in sodium abuse.
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Affiliation(s)
- Hans Oberleithner
- Institute of Physiology II, University of Münster, Robert-Koch-Str. 27b, 48149, Münster, Germany.
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Callies C, Fels J, Liashkovich I, Kliche K, Jeggle P, Kusche-Vihrog K, Oberleithner H. Membrane potential depolarization decreases the stiffness of vascular endothelial cells. J Cell Sci 2011; 124:1936-42. [PMID: 21558418 DOI: 10.1242/jcs.084657] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The stiffness of vascular endothelial cells is crucial to mechanically withstand blood flow and, at the same time, to control deformation-dependent nitric oxide release. However, the regulation of mechanical stiffness is not yet understood. There is evidence that a possible regulator is the electrical plasma membrane potential difference. Using a novel technique that combines fluorescence-based membrane potential recordings with atomic force microscopy (AFM)-based stiffness measurements, the present study shows that membrane depolarization is associated with a decrease in the stiffness of endothelial cells. Three different depolarization protocols were applied, all of which led to a similar and significant decrease in cell stiffness, independently of changes in cell volume. Moreover, experiments using the actin-destabilizing agent cytochalasin D indicated that depolarization acts by affecting the cortical actin cytoskeleton. A model is proposed whereby a change of the electrical field across the plasma membrane is directly sensed by the submembranous actin network, regulating the actin polymerization:depolymerization ratio and thus cell stiffness. This depolarization-induced decrease in the stiffness of endothelial cells could play a role in flow-mediated nitric-oxide-dependent vasodilation.
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Affiliation(s)
- Chiara Callies
- Institute of Physiology II, University of Münster, Robert-Koch-Str. 27b, 48149 Münster, Germany.
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Kusche-Vihrog K, Urbanova K, Blanqué A, Wilhelmi M, Schillers H, Kliche K, Pavenstädt H, Brand E, Oberleithner H. C-reactive protein makes human endothelium stiff and tight. Hypertension 2010; 57:231-7. [PMID: 21149827 DOI: 10.1161/hypertensionaha.110.163444] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Elevation of C-reactive protein (CRP) in human blood accompanies inflammatory processes, including cardiovascular diseases. There is increasing evidence that the acute-phase reactant CRP is not only a passive marker protein for systemic inflammation but also affects the vascular system. Further, CRP is an independent risk factor for atherosclerosis and the development of hypertension. Another crucial player in atherosclerotic processes is the mineralocorticoid hormone aldosterone. Even in low physiological concentrations, it stimulates the expression and membrane insertion of the epithelial sodium channel, thereby increasing the mechanical stiffness of endothelial cells. This contributes to the progression of endothelial dysfunction. In the present study, the hypothesis was tested that the acute application of CRP (25 mg/L), in presence of aldosterone (0.5 nmol/L; 24 hour incubation), modifies the mechanical stiffness and permeability of the endothelium. We found that endothelial cells stiffen in response to CRP. In parallel, endothelial epithelial sodium channel is inserted into the plasma membrane, while, surprisingly, the endothelial permeability decreases. CRP actions are prevented either by the inhibition of the intracellular aldosterone receptors using spironolactone (5 nmol/L) or by the inactivation of epithelial sodium channel using specific blockers. In contrast, inhibition of the release of the vasodilating gas nitric oxide via blockade of the phosphoinositide 3-kinase/Akt pathway has no effect on the CRP-induced stiffening of endothelial cells. The data indicate that CRP enhances the effects of aldosterone on the mechanical properties of the endothelium. Thus, CRP could counteract any decrease in arterial blood pressure that accompanies severe acute inflammatory processes.
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Kusche-Vihrog K, Callies C, Fels J, Oberleithner H. The epithelial sodium channel (ENaC): Mediator of the aldosterone response in the vascular endothelium? Steroids 2010; 75:544-9. [PMID: 19778545 DOI: 10.1016/j.steroids.2009.09.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 09/11/2009] [Accepted: 09/14/2009] [Indexed: 12/15/2022]
Abstract
In the kidney the epithelial sodium channel (ENaC) is regulated by the mineralocorticoid hormone aldosterone, which is essential for long-term blood pressure control. Evidence has accumulated showing that ENaC is expressed in endothelial cells. Moreover, its activity modifies the biomechanical properties of the endothelium. Therefore, the vascular system is also an important target for aldosterone and responds to the hormone with an increase in cell volume, surface area, and mechanical stiffness. These changes occur in a concerted fashion from minutes to hours and can be prevented by the specific sodium channel blocker amiloride and the mineralocorticoid receptor (MR) blocker spironolactone. Aldosterone acts on cells of the vascular system via genomic and non-genomic pathways. There is evidence that the classical cytosolic MR could mediate both types of response. Using a nanosensor covalently linked to aldosterone, binding sites at the plasma membrane were identified by atomic force microscopy. The interaction of aldosterone and this newly identified surface receptor could precede the slow classic genomic aldosterone response resulting in fast activation of endothelial ENaC. Recent data suggest that aldosterone-induced ENaC activation initiates a sequence of cellular events leading to a reduced release of vasodilating nitric oxide. We propose a model in which ENaC is the key mediator of aldosterone-dependent blood pressure control in the vascular endothelium.
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Fels J, Oberleithner H, Kusche-Vihrog K. Ménage à trois: aldosterone, sodium and nitric oxide in vascular endothelium. Biochim Biophys Acta Mol Basis Dis 2010; 1802:1193-202. [PMID: 20302930 DOI: 10.1016/j.bbadis.2010.03.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Revised: 03/10/2010] [Accepted: 03/11/2010] [Indexed: 12/16/2022]
Abstract
Aldosterone, a mineralocorticoid hormone mainly synthesized in the adrenal cortex, has been recognized to be a regulator of cell mechanics. Recent data from a number of laboratories implicate that, besides kidney, the cardiovascular system is an important target for aldosterone. In the endothelium, it promotes the expression of epithelial sodium channels (ENaC) and modifies the morphology of cells in terms of mechanical stiffness, surface area and volume. Additionally, it renders the cells highly sensitive to small changes in extracellular sodium and potassium. In this context, the time course of aldosterone action is pivotal. In the fast (seconds to minutes), non-genomic signalling pathway vascular endothelial cells respond to aldosterone with transient swelling, softening and insertion of ENaC in the apical plasma membrane. In parallel, nitric oxide (NO) is released from the cells. In the long-term (hours), aldosterone has opposite effects: The mechanical stiffness increases, the cells shrink and NO production decreases. This leads to the conclusion that both the physiology and pathophysiology of aldosterone action in the vascular endothelium are closely related. Aldosterone, at concentrations in the physiological range and over limited time periods can stabilize blood pressure and regulate tissue perfusion while chronically high concentrations of this hormone over extended time periods impair sodium homeostasis promoting endothelial dysfunction and the development of tissue fibrosis.
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Affiliation(s)
- Johannes Fels
- Institute of Physiology II, University of Münster, Germany
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46
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Abstract
Dietary sodium and potassium contribute to the control of the blood pressure. Endothelial cells are targets for aldosterone, which activates the apically located epithelial sodium channels. The activity of these channels is negatively correlated with the release of nitric oxide (NO) and determines endothelial function. A mediating factor between channel activity and NO release is the mechanical stiffness of the cell's plasma membrane, including the submembranous actin network (the cell's 'shell'). Changes in plasma sodium and potassium, within the physiological range, regulate the viscosity of this shell and thus control the shear-stress-dependent activity of the endothelial NO synthase located in the shell's 'pockets' (caveolae). High plasma sodium gelates the shell of the endothelial cell, whereas the shell is fluidized by high potassium. Accordingly, this concept envisages that communications between extracellular ions and intracellular enzymes occur at the plasma membrane barrier, whereas 90% of the total cell mass remains uninvolved in these changes. Endothelial cells are highly sensitive to extracellular sodium and potassium. This sensitivity may serve as a physiological feedback mechanism to regulate local blood flow. It may also have pathophysiological relevance when sodium/potassium homeostasis is disturbed.
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Affiliation(s)
- Hans Oberleithner
- Medical Faculty, Institute of Physiology II, University of Münster, 48149 Münster, Germany.
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Bangel-Ruland N, Sobczak K, Christmann T, Kentrup D, Langhorst H, Kusche-Vihrog K, Weber WM. Characterization of the epithelial sodium channel delta-subunit in human nasal epithelium. Am J Respir Cell Mol Biol 2009; 42:498-505. [PMID: 19520916 DOI: 10.1165/rcmb.2009-0053oc] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The epithelial sodium channel (ENaC) mediates the first step in Na+ reabsorption in epithelial cells such as kidney, colon, and airways and may consist of four homologous subunits (alpha, beta, gamma, delta). Predominantly, the alpha-subunit is expressed in these epithelia, and it usually forms functional channels with the beta- and gamma-subunits. The delta-subunit was first found in human brain and kidney, but the expression was also detected in human cell lines of lung, pancreatic, and colonic origin. When co-expressed with beta and gamma accessory subunits in heterologous systems, the two known isoforms of the delta-ENaC subunit (delta1 and delta2) can build amiloride-sensitive Na+ channels. In the present study we demonstrate the expression and function of the delta-subunit in human nasal epithelium (HNE). We cloned and sequenced the full-length cDNA of the delta-ENaC subunit and were able to show that in nasal tissue at least isoform 1 is expressed. Furthermore, we performed Western blot analyses and compared the cell surface expression of the delta-subunit with the classically expressed alpha-subunit by using immunofluorescence experiments. Thereby, we could show that the quantity of both subunits is almost similar. In addition, we show the functional expression of the delta-ENaC subunit with measurements in modified Ussing chambers, and demonstrate that in HNE a large portion of the Na+ transport is mediated by the delta-ENaC subunit. Therefore, we suppose that the delta-subunit may possess an important regulatory function and might interact with other ENaC subunits or members of the DEG/ENaC family in the human respiratory epithelium.
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Affiliation(s)
- Nadine Bangel-Ruland
- Institute of Animal Physiology, University of Muenster, Hindenburgplatz 55, 48143 Muenster, Germany.
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Callies C, Schön P, Liashkovich I, Stock C, Kusche-Vihrog K, Fels J, Sträter AS, Oberleithner H. Simultaneous mechanical stiffness and electrical potential measurements of living vascular endothelial cells using combined atomic force and epifluorescence microscopy. Nanotechnology 2009; 20:175104. [PMID: 19420584 DOI: 10.1088/0957-4484/20/17/175104] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The degree of mechanical stiffness of vascular endothelial cells determines the endogenous production of the vasodilating gas nitric oxide (NO). However, the underlying mechanisms are not yet understood. Experiments on vascular endothelial cells suggest that the electrical plasma membrane potential is involved in this regulatory process. To test this hypothesis we developed a technique that simultaneously measures the electrical membrane potential and stiffness of vascular endothelial cells (GM7373 cell line derived from bovine aortic endothelium) under continuous perfusion with physiological electrolyte solution. The cellular stiffness was determined by nano-indentation using an atomic force microscope (AFM) while the electrical membrane potential was measured with bis-oxonol, a voltage-reporting fluorescent dye. These two methods were combined using an AFM attached to an epifluorescence microscope. The electrical membrane potential and mechanical stiffness of the same cell were continuously recorded for a time span of 5 min. Fast fluctuations (in the range of seconds) of both the electrical membrane potential and mechanical stiffness could be observed that were not related to each other. In contrast, slow cell depolarizations (in the range of minutes) were paralleled by significant increases in mechanical stiffness. In conclusion, using the combined AFM-fluorescence technique we monitored for the first time simultaneously the electrical plasma membrane potential and mechanical stiffness in a living cell. Vascular endothelial cells exhibit oscillatory non-synchronized waves of electrical potential and mechanical stiffness. The sustained membrane depolarization, however, is paralleled by a concomitant increase of cell stiffness. The described method is applicable for any fluorophore, which opens new perspectives in biomedical research.
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Affiliation(s)
- Chiara Callies
- Institute of Physiology II, University of Münster, Germany.
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Kusche-Vihrog K, Segal A, Grygorczyk R, Bangel-Ruland N, Van Driessche W, Weber WM. Expression of ENaC and other Transport Proteins in Xenopus Oocytes is Modulated by Intracellular Na +. Cell Physiol Biochem 2009; 23:9-24. [DOI: 10.1159/000204076] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2008] [Indexed: 11/19/2022] Open
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50
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Wildling L, Hinterdorfer P, Kusche-Vihrog K, Treffner Y, Oberleithner H. Aldosterone receptor sites on plasma membrane of human vascular endothelium detected by a mechanical nanosensor. Pflugers Arch 2008; 458:223-30. [DOI: 10.1007/s00424-008-0615-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Accepted: 10/30/2008] [Indexed: 12/18/2022]
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