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Janovicz A, Majer A, Kosztelnik M, Geiszt M, Chun J, Ishii S, Tigyi GJ, Benyó Z, Ruisanchez É. Autotaxin-lysophosphatidic acid receptor 5 axis evokes endothelial dysfunction via reactive oxygen species signaling. Exp Biol Med (Maywood) 2023; 248:1887-1894. [PMID: 37837357 PMCID: PMC10792427 DOI: 10.1177/15353702231199081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 07/29/2023] [Indexed: 10/16/2023] Open
Abstract
Lysophosphatidylcholine (LPC) is a bioactive lipid that has been shown to attenuate endothelium-dependent vasorelaxation contributing to endothelial dysfunction; however, the underlying mechanisms are not well understood. In this study, we investigated the molecular mechanisms involved in the development of LPC-evoked impairment of endothelium-dependent vasorelaxation. In aortic rings isolated from wild-type (WT) mice, a 20-min exposure to LPC significantly reduced the acetylcholine chloride (ACh)-induced vasorelaxation indicating the impairment of normal endothelial function. Interestingly, pharmacological inhibition of autotaxin (ATX) by GLPG1690 partially reversed the endothelial dysfunction, suggesting that lysophosphatidic acid (LPA) derived from LPC may be involved in the effect. Therefore, the effect of LPC was also tested in aortic rings isolated from different LPA receptor knock-out (KO) mice. LPC evoked a marked reduction in ACh-dependent vasorelaxation in Lpar1, Lpar2, and Lpar4 KO, but its effect was significantly attenuated in Lpar5 KO vessels. Furthermore, addition of superoxide dismutase reduced the LPC-induced endothelial dysfunction in WT but not in the Lpar5 KO mice. In addition, LPC increased H2O2 release from WT vessels, which was significantly reduced in Lpar5 KO vessels. Our findings indicate that the ATX-LPA-LPA5 receptor axis is involved in the development of LPC-induced impairment of endothelium-dependent vasorelaxation via LPA5 receptor-mediated reactive oxygen species production. Taken together, in this study, we identified a new pathway contributing to the development of LPC-induced endothelial dysfunction.
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Affiliation(s)
- Anna Janovicz
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Aliz Majer
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Mónika Kosztelnik
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Miklós Geiszt
- Department of Physiology, Faculty of Medicine, Semmelweis University, H-1094 Budapest, Hungary
| | - Jerold Chun
- Translational Neuroscience at Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Satoshi Ishii
- Department of Immunology, Graduate School of Medicine, Akita University, Akita 010-8543, Japan
| | - Gábor József Tigyi
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Department of Physiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Zoltán Benyó
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
| | - Éva Ruisanchez
- Institute of Translational Medicine, Semmelweis University, H-1094 Budapest, Hungary
- Eötvös Loránd Research Network and Semmelweis University (ELKH-SE) Cerebrovascular and Neurocognitive Disorders Research Group, H-1052 Budapest, Hungary
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Dias MTS, Aguilar EC, Campos GP, do Couto NF, Capettini LDSA, Braga WF, Andrade LDO, Alvarez-Leite J. Butyrate inhibits LPC-induced endothelial dysfunction by regulating nNOS-produced NO and ROS production. Nitric Oxide 2023; 138-139:42-50. [PMID: 37308032 DOI: 10.1016/j.niox.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/09/2023] [Accepted: 05/25/2023] [Indexed: 06/14/2023]
Abstract
Lipids oxidation is a key risk factor for cardiovascular diseases. Lysophosphatidylcholine (LPC), the major component of oxidized LDL, is an important triggering agent for endothelial dysfunction and atherogenesis. Sodium butyrate, a short-chain fatty acid, has demonstrated atheroprotective properties. So, we evaluate the role of butyrate in LPC-induced endothelial dysfunction. Vascular response to phenylephrine (Phe) and acetylcholine (Ach) was performed in aortic rings from male mice (C57BL/6J). The aortic rings were incubated with LPC (10 μM) and butyrate (0.01 or 0.1 Mm), with or without TRIM (an nNOS inhibitor). Endothelial cells (EA.hy296) were incubated with LPC and butyrate to evaluate nitric oxide (NO) and reactive oxygen species (ROS) production, calcium influx, and the expression of total and phosphorylated nNOS and ERK½. We found that butyrate inhibited LPC-induced endothelial dysfunction by improving nNOS activity in aortic rings. In endothelial cells, butyrate reduced ROS production and increased nNOS-related NO release, by improving nNOS activation (phosphorylation at Ser1412). Additionally, butyrate prevented the increase in cytosolic calcium and inhibited ERk½ activation by LPC. In conclusion, butyrate inhibited LPC-induced vascular dysfunction by increasing nNOS-derived NO and reducing ROS production. Butyrate restored nNOS activation, which was associated with calcium handling normalization and reduction of ERK½ activation.
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Affiliation(s)
- Melissa Tainan Silva Dias
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos 6627 - Campus Pampulha, Cx Post 468, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Edenil Costa Aguilar
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos 6627 - Campus Pampulha, Cx Post 468, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Gianne Paul Campos
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos 6627 - Campus Pampulha, Cx Post 468, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Natalia Fernanda do Couto
- Department of Medicine. University of Illinois Chicago, Center of Cardiovascular Research, 909 South Wolcott Avenue, MC801 Chicago, IL, 60612, USA.
| | - Luciano Dos Santos Aggum Capettini
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos 6627 - Campus Pampulha, Cx Post 468, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Weslley Fernandes Braga
- Icahn School of Medicine. Mount Sinai, Nova Iorque, Gustave L. Levy Place, New York, NY, 10029-5674, USA.
| | - Luciana de Oliveira Andrade
- Department of Cell Biology, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos 6627 - Campus Pampulha, Cx Post 468, CEP 31270-901, Belo Horizonte, MG, Brazil.
| | - Jacqueline Alvarez-Leite
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos 6627 - Campus Pampulha, Cx Post 468, CEP 31270-901, Belo Horizonte, MG, Brazil.
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3
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Guo Y, Yin L, Qian X, Yang Y, Luo X. PET/d-PET (PdP) Pairing for the Design of Dual-Channel Probes. Anal Chem 2023. [PMID: 37314854 DOI: 10.1021/acs.analchem.3c02054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Design principles of two-channel fluorescence probes are limited. Herein, we report a new principle, i.e., PET/d-PET (PdP) pairing, for the rational design of two-channel probes. Two fluorophores are required in such a PdP-type probe. They mutually quench their fluorescence via PET and d-PET. In the presence of an analyte-of-interest, such a PdP pair is converted into a FRET pair for signaling. The embodiment of such a principle is Rh-TROX, by tethering a rhodamine fluorophore with an ROS-sensitive probe (TotalROX). Fluorescence of both fluorophores in Rh-TROX was quenched as expected. The addition of highly reactive oxidative species led to the recovery of the fluorescence properties of both. The simultaneous fluorescence enhancement in two channels is a viable way to avoid false-positive signals. The new PdP principle could potentially be applied to the development of probes for another range of substrates.
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Affiliation(s)
- Yinghua Guo
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Lei Yin
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xuhong Qian
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Youjun Yang
- Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xiao Luo
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
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Sylvester CB, Amirkhosravi F, Bortoletto AS, West WJ, Connell JP, Grande-Allen KJ. Dantrolene inhibits lysophosphatidylcholine-induced valve interstitial cell calcific nodule formation via blockade of the ryanodine receptor. Front Cardiovasc Med 2023; 10:1112965. [PMID: 37063962 PMCID: PMC10100588 DOI: 10.3389/fcvm.2023.1112965] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/09/2023] [Indexed: 04/01/2023] Open
Abstract
Calcific aortic valve disease (CAVD), a fibrocalcific thickening of the aortic valve leaflets causing obstruction of the left ventricular outflow tract, affects nearly 10 million people worldwide. For those who reach end-stage CAVD, the only treatment is highly invasive valve replacement. The development of pharmaceutical treatments that can slow or reverse the progression in those affected by CAVD would greatly advance the treatment of this disease. The principal cell type responsible for the fibrocalcific thickening of the valve leaflets in CAVD is valvular interstitial cells (VICs). The cellular processes mediating this calcification are complex, but calcium second messenger signaling, regulated in part by the ryanodine receptor (RyR), has been shown to play a role in a number of other fibrocalcific diseases. We sought to determine if the blockade of calcium signaling in VICs could ameliorate calcification in an in vitro model. We previously found that VICs express RyR isotype 3 and that its modulation could prevent VIC calcific nodule formation in vitro. We sought to expand upon these results by further investigating the effects of calcium signaling blockade on VIC gene expression and behavior using dantrolene, an FDA-approved pan-RyR inhibitor. We found that dantrolene also prevented calcific nodule formation in VICs due to cholesterol-derived lysophosphatidylcholine (LPC). This protective effect corresponded with decreases in intracellular calcium flux, apoptosis, and ACTA2 expression but not reactive oxygen species formation caused by LPC. Interestingly, dantrolene increased the expression of the regulator genes RUNX2 and SOX9, indicating complex gene regulation changes. Further investigation via RNA sequencing revealed that dantrolene induced several cytoprotective genes that are likely also responsible for its attenuation of LPC-induced calcification. These results suggest that RyR3 is a viable therapeutic target for the treatment of CAVD. Further studies of the effects of RyR3 inhibition on CAVD are warranted.
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Affiliation(s)
- Christopher B. Sylvester
- Department of Bioengineering, Rice University, Houston, TX, United States
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, United States
| | - Farshad Amirkhosravi
- Department of Bioengineering, Rice University, Houston, TX, United States
- Department of Surgery, Houston Methodist Hospital, Houston, TX, United States
| | - Angelina S. Bortoletto
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, United States
- Center for Cell and Gene, Stem Cells, and Regenerative Medicine Center, Translational and Molecular Medicine Program, Baylor College of Medicine, Houston, TX, United States
| | - William J. West
- Department of Bioengineering, Rice University, Houston, TX, United States
- Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | | | - K. Jane Grande-Allen
- Department of Bioengineering, Rice University, Houston, TX, United States
- Correspondence: K. Jane Grande-Allen
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Klobučar I, Stadler JT, Klobučar L, Lechleitner M, Trbušić M, Pregartner G, Berghold A, Habisch H, Madl T, Marsche G, Frank S, Degoricija V. Associations between Endothelial Lipase, High-Density Lipoprotein, and Endothelial Function Differ in Healthy Volunteers and Metabolic Syndrome Patients. Int J Mol Sci 2023; 24:2073. [PMID: 36768410 PMCID: PMC9916974 DOI: 10.3390/ijms24032073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 01/21/2023] Open
Abstract
Metabolic syndrome (MS) is characterized by endothelial- and high-density lipoprotein (HDL) dysfunction and increased endothelial lipase (EL) serum levels. We examined the associations between EL serum levels, HDL (serum levels, lipid content, and function), and endothelial function in healthy volunteers (HV) and MS patients. Flow-mediated dilation (FMD), nitroglycerin-mediated dilation (NMD), serum levels of HDL subclasses (measured by nuclear magnetic resonance (NMR) spectroscopy), and EL serum levels differed significantly between HV and MS patients. The serum levels of triglycerides in large HDL particles were significantly positively correlated with FMD and NMD in HV, but not in MS patients. Cholesterol (C) and phospholipid (PL) contents of large HDL particles, calculated as HDL1-C/HDL1-apoA-I and HDL1-PL/HDL1-apoA-I, respectively, were significantly negatively correlated with FMD in HV, but not in MS patients. Cholesterol efflux capacity and arylesterase activity of HDL, as well as EL, were correlated with neither FMD nor NMD. EL was significantly negatively correlated with HDL-PL/HDL-apoA-I in HV, but not in MS patients, and with serum levels of small dense HDL containing apolipoprotein A-II in MS patients, but not in HV. We conclude that MS modulates the association between HDL and endothelial function, as well as between EL and HDL. HDL cholesterol efflux capacity and arylesterase activity, as well as EL serum levels, are not associated with endothelial function in HV or MS patients.
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Affiliation(s)
- Iva Klobučar
- Department of Cardiology, Sisters of Charity University Hospital Centre, 10000 Zagreb, Croatia
| | - Julia T. Stadler
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, 8010 Graz, Austria
| | - Lucija Klobučar
- Department of Medicine, University Hospital Centre Osijek, 31000 Osijek, Croatia
| | - Margarete Lechleitner
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
| | - Matias Trbušić
- Department of Cardiology, Sisters of Charity University Hospital Centre, 10000 Zagreb, Croatia
- School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Gudrun Pregartner
- Institute for Medical Informatics, Statistics und Documentation, Medical University of Graz, 8036 Graz, Austria
| | - Andrea Berghold
- Institute for Medical Informatics, Statistics und Documentation, Medical University of Graz, 8036 Graz, Austria
| | - Hansjörg Habisch
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
| | - Tobias Madl
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Gunther Marsche
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Saša Frank
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Vesna Degoricija
- School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
- Department of Medicine, Sisters of Charity University Hospital Centre, 10000 Zagreb, Croatia
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Enayati M, Schneider KH, Almeria C, Grasl C, Kaun C, Messner B, Rohringer S, Walter I, Wojta J, Budinsky L, Walpoth BH, Schima H, Kager G, Hallström S, Podesser BK, Bergmeister H. S-nitroso human serum albumin as a nitric oxide donor in drug-eluting vascular grafts: Biofunctionality and preclinical evaluation. Acta Biomater 2021; 134:276-288. [PMID: 34329787 DOI: 10.1016/j.actbio.2021.07.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/22/2021] [Accepted: 07/22/2021] [Indexed: 11/28/2022]
Abstract
Currently available synthetic small diameter vascular grafts reveal low patency rates due to thrombosis and intimal hyperplasia. Biofunctionalized grafts releasing nitric oxide (NO) in situ may overcome these limitations. In this study, a drug-eluting vascular graft was designed by blending polycaprolactone (PCL) with S-nitroso-human-serum-albumin (S-NO-HSA), a nitric oxide donor with prolonged half-life. PCL-S-NO-HSA grafts and patches were fabricated via electrospinning. The fabrication process was optimized. Patches were characterized in vitro for their morphology, drug release, biomechanics, inflammatory effects, cell proliferation, and expression of adhesion molecules. The selected optimized formulation (8%PCL-S-NO-HSA) had superior mechanical/morphological properties with high protein content revealing extended NO release (for 28 days). 8%PCL-S-NO-HSA patches significantly promoted endothelial cell proliferation while limiting smooth muscle cell proliferation. Expression of adhesion molecules (ICAM-1, VCAM-1) and pro-inflammatory macrophage/cytokine markers (CD80, IL-1α, TNF-α) was significantly reduced. 8%PCL-S-NO-HSA patches had superior immunomodulatory properties by up-regulating anti-inflammatory cytokines (IL-10) and M2 macrophage marker (CD163) at final time points. Grafts were further evaluated in a small rodent model as aortic implants up to 12 weeks. Grafts were assessed by magnetic resonance imaging angiography (MRI) in vivo and after retrieval by histology. All grafts remained 100 % patent with no signs of thrombosis or calcification. 8%PCL-S-NO-HSA vascular grafts supported rapid endothelialization, whereas smooth muscle cell proliferation was hampered in earlier phases. This study indicates that 8%PCL-S-NO-HSA grafts effectively support long-term in situ release of bioactive NO. The beneficial effects observed can be promising features for long-term success of small diameter vascular grafts. STATEMENT OF SIGNIFICANCE: Despite extensive research in the field of small diameter vascular graft replacement, there is still no appropriate substitute to autografts yet. Various limitations are associated with currently available synthetic vascular grafts such as thrombogenicity and intimal hyperplasia. Therefore, developing new generations of such conduits has become a major focus of research. One of the most significant signaling molecules that are involved in homeostasis of the vascular system is nitric oxide. The new designed nitric-oxide eluting vascular grafts described in this study induce rapid surface endothelialization and late migration of SMCs into the graft wall. These beneficial effects have potential to improve current limitations of small diameter vascular grafts.
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Affiliation(s)
- Marjan Enayati
- Center for Biomedical Research, Medical University Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Karl H Schneider
- Center for Biomedical Research, Medical University Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Ciarra Almeria
- Center for Biomedical Research, Medical University Vienna, Austria
| | - Christian Grasl
- Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Austria
| | - Christoph Kaun
- Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Barbara Messner
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University Vienna, Austria
| | - Sabrina Rohringer
- Center for Biomedical Research, Medical University Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria
| | - Ingrid Walter
- Department of Pathobiology, University of Veterinary Medicine, Vienna, Austria
| | - Johann Wojta
- Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - Lubos Budinsky
- Preclinical Imaging Laboratory, Division of Molecular and Gender Imaging, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria; Faculty of Chemical and Food Technology, Central Laboratories, Slovak University of Technology, Bratislava, Slovakia
| | - Beat H Walpoth
- Emeritus, Cardiovascular Surgery and Research, University Hospital & University of Geneva, Geneva, Switzerland
| | - Heinrich Schima
- Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Austria
| | - Gerd Kager
- Division of Physiological Chemistry, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Seth Hallström
- Division of Physiological Chemistry, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Bruno K Podesser
- Center for Biomedical Research, Medical University Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Helga Bergmeister
- Center for Biomedical Research, Medical University Vienna, Austria; Ludwig Boltzmann Institute for Cardiovascular Research, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria.
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7
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Lysophosphatidylcholine induces oxidative stress in human endothelial cells via NOX5 activation - implications in atherosclerosis. Clin Sci (Lond) 2021; 135:1845-1858. [PMID: 34269800 DOI: 10.1042/cs20210468] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 07/02/2021] [Accepted: 07/16/2021] [Indexed: 02/01/2023]
Abstract
OBJECTIVE The mechanisms involved in NOX5 activation in atherosclerotic processes are not completely understood. This study tested the hypothesis that lysophosphatidylcholine (LPC), a proatherogenic component of oxLDL, induces endothelial calcium influx, which drives NOX5-dependent reactive oxygen species (ROS) production, oxidative stress, and endothelial cell dysfunction. Approach: Human aortic endothelial cells (HAEC) were stimulated with LPC (10-5 M, for different time points). Pharmacological inhibition of NOX5 (Melittin, 10-7 M) and NOX5 gene silencing (siRNA) were used to determine the role of NOX5-dependent ROS production in endothelial oxidative stress induced by LPC. ROS production was determined by lucigenin assay and electron paramagnetic spectroscopy (EPR), calcium transients by Fluo4 fluorimetry, and NOX5 activity and protein expression by pharmacological assays and immunoblotting, respectively. RESULTS LPC increased ROS generation in endothelial cells at short (15 min) and long (4 h) stimulation times. LPC-induced ROS was abolished by a selective NOX5 inhibitor and by NOX5 siRNA. NOX1/4 dual inhibition and selective NOX1 inhibition only decreased ROS generation at 4 h. LPC increased HAEC intracellular calcium, important for NOX5 activation, and this was blocked by nifedipine and thapsigargin. Bapta-AM, selective Ca2+ chelator, prevented LPC-induced ROS production. NOX5 knockdown decreased LPC-induced ICAM-1 mRNA expression and monocyte adhesion to endothelial cells. CONCLUSION These results suggest that NOX5, by mechanisms linked to increased intracellular calcium, is key to early LPC-induced endothelial oxidative stress and pro-inflammatory processes. Since these are essential events in the formation and progression of atherosclerotic lesions, this study highlights an important role for NOX5 in atherosclerosis.
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8
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Liu P, Zhu W, Chen C, Yan B, Zhu L, Chen X, Peng C. The mechanisms of lysophosphatidylcholine in the development of diseases. Life Sci 2020; 247:117443. [DOI: 10.1016/j.lfs.2020.117443] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/11/2020] [Accepted: 02/17/2020] [Indexed: 02/07/2023]
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9
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Radulović S, Gottschalk B, Hörl G, Zardoya-Laguardia P, Schilcher I, Hallström S, Vujić N, Schmidt K, Trieb M, Graier WF, Malli R, Kratky D, Marsche G, Frank S. Endothelial lipase increases eNOS activating capacity of high-density lipoprotein. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158612. [PMID: 31923467 PMCID: PMC7116681 DOI: 10.1016/j.bbalip.2020.158612] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 12/30/2019] [Accepted: 12/31/2019] [Indexed: 12/26/2022]
Abstract
Endothelial lipase (EL) changes structural and functional properties of high-density lipoprotein (HDL). HDL is a relevant modulator of endothelial nitric oxide synthase (eNOS) activity, but the effect of EL on HDL induced eNOS-activation has not yet been investigated. Here, we examined the impact of EL-modified HDL (EL-HDL) on eNOS activity, subcellular trafficking, and eNOS- dependent vasorelaxation. EL-HDL and empty virus (EV)-HDL as control were isolated from human serum incubated with EL-overexpressing or EV infected HepG2 cells. EL-HDL exhibited higher capacity to induce eNOS phosphorylation at Ser1177 and eNOS activity in EA.hy 926 cells, as well as eNOS-dependent vasorelaxation of mouse aortic rings compared to control HDL. As revealed by confocal and structured illumination-microscopy EL-HDL-driven induction of eNOS was accompanied by an increased eNOS-GFP targeting to the plasma membrane and a lower eNOS-GFP colocalization with Golgi and mitochondria. Widefield microscopy of filipin stained cells revealed that EL-HDL lowered cellular free cholesterol (FC) and as found by thin-layer chromatography increased cellular cholesterol ester (CE) content. Additionally, cholesterol efflux capacity, acyl-coenzyme A: cholesterol acyltransferase activity, and HDL particle uptake were comparable between EL-HDL and control HDL. In conclusion, EL increases eNOS activating capacity of HDL, a phenomenon accompanied by an enrichment of the plasma membrane eNOS pool, a decreased cell membrane FC and increased cellular CE content.
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Affiliation(s)
- Snježana Radulović
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Benjamin Gottschalk
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Gerd Hörl
- Otto Loewi Research Center, Division of Physiological Chemistry, Medical University of Graz, Neue Stiftingtalstraße 6/3, 8010 Graz, Austria
| | - Pablo Zardoya-Laguardia
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Irene Schilcher
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Seth Hallström
- Otto Loewi Research Center, Division of Physiological Chemistry, Medical University of Graz, Neue Stiftingtalstraße 6/3, 8010 Graz, Austria
| | - Nemanja Vujić
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria
| | - Kurt Schmidt
- Department of Pharmacology and Toxicology, University of Graz, Graz, Austria
| | - Markus Trieb
- Otto Loewi Research Center, Division of Experimental and Clinical Pharmacology, Medical University of Graz, Universitätsplatz 4, 8010 Graz, Austria
| | - Wolfgang F Graier
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria
| | - Roland Malli
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria
| | - Dagmar Kratky
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria
| | - Gunther Marsche
- Otto Loewi Research Center, Division of Experimental and Clinical Pharmacology, Medical University of Graz, Universitätsplatz 4, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria
| | - Saša Frank
- Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6/6, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria.
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10
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Fanaee-Danesh E, Gali CC, Tadic J, Zandl-Lang M, Carmen Kober A, Agujetas VR, de Dios C, Tam-Amersdorfer C, Stracke A, Albrecher NM, Manavalan APC, Reiter M, Sun Y, Colell A, Madeo F, Malle E, Panzenboeck U. Astaxanthin exerts protective effects similar to bexarotene in Alzheimer's disease by modulating amyloid-beta and cholesterol homeostasis in blood-brain barrier endothelial cells. Biochim Biophys Acta Mol Basis Dis 2019; 1865:2224-2245. [PMID: 31055081 DOI: 10.1016/j.bbadis.2019.04.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 04/28/2019] [Accepted: 04/30/2019] [Indexed: 12/15/2022]
Abstract
The pathogenesis of Alzheimer's disease (AD) is characterized by overproduction, impaired clearance, and deposition of amyloid-β peptides (Aβ) and connected to cholesterol homeostasis. Since the blood-brain barrier (BBB) is involved in these processes, we investigated effects of the retinoid X receptor agonist, bexarotene (Bex), and the peroxisome proliferator-activated receptor α agonist and antioxidant, astaxanthin (Asx), on pathways of cellular cholesterol metabolism, amyloid precursor protein processing/Aβ production and transfer at the BBB in vitro using primary porcine brain capillary endothelial cells (pBCEC), and in 3xTg AD mice. Asx/Bex downregulated transcription/activity of amyloidogenic BACE1 and reduced Aβ oligomers and ~80 kDa intracellular 6E10-reactive APP/Aβ species, while upregulating non-amyloidogenic ADAM10 and soluble (s)APPα production in pBCEC. Asx/Bex enhanced Aβ clearance to the apical/plasma compartment of the in vitro BBB model. Asx/Bex increased expression levels of ABCA1, LRP1, and/or APOA-I. Asx/Bex promoted cholesterol efflux, partly via PPARα/RXR activation, while cholesterol biosynthesis/esterification was suppressed. Silencing of LRP-1 or inhibition of ABCA1 by probucol reversed Asx/Bex-mediated effects on levels of APP/Aβ species in pBCEC. Murine (m)BCEC isolated from 3xTg AD mice treated with Bex revealed elevated expression of APOE and ABCA1. Asx/Bex reduced BACE1 and increased LRP-1 expression in mBCEC from 3xTg AD mice when compared to vehicle-treated or non-Tg treated mice. In parallel, Asx/Bex reduced levels of Aβ oligomers in mBCEC and Aβ species in brain soluble and insoluble fractions of 3xTg AD mice. Our results suggest that both agonists exert beneficial effects at the BBB by balancing cholesterol homeostasis and enhancing clearance of Aβ from cerebrovascular endothelial cells.
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Affiliation(s)
- Elham Fanaee-Danesh
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Chaitanya Chakravarthi Gali
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Jelena Tadic
- Institute of Molecular Biosciences, University of Graz, Graz, Austria
| | - Martina Zandl-Lang
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Alexandra Carmen Kober
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Vicente Roca Agujetas
- Department of Cell Death and Proliferation, Institut d'Investigacions Biomèdiques de Barcelona, Consejo Superior de Investigaciones Científicas (CSIC), IDIBAPS, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Cristina de Dios
- Department of Cell Death and Proliferation, Institut d'Investigacions Biomèdiques de Barcelona, Consejo Superior de Investigaciones Científicas (CSIC), IDIBAPS, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain; Department of Biomedicine, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain
| | - Carmen Tam-Amersdorfer
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Anika Stracke
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Nicole Maria Albrecher
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | | | - Marielies Reiter
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Yidan Sun
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria
| | - Anna Colell
- Department of Cell Death and Proliferation, Institut d'Investigacions Biomèdiques de Barcelona, Consejo Superior de Investigaciones Científicas (CSIC), IDIBAPS, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Frank Madeo
- Institute of Molecular Biosciences, University of Graz, Graz, Austria; BioTechMed Graz, Graz, Austria
| | - Ernst Malle
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Ute Panzenboeck
- Division of Immunology and Pathophysiology, Otto Loewi Research Center, Medical University of Graz, Graz, Austria.
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11
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Kétszeri M, Kirsch A, Frauscher B, Moschovaki-Filippidou F, Mooslechner AA, Kirsch AH, Schabhuettl C, Aringer I, Artinger K, Pregartner G, Ekart R, Breznik S, Hojs R, Goessler W, Schilcher I, Müller H, Obermayer-Pietsch B, Frank S, Rosenkranz AR, Eller P, Eller K. MicroRNA-142-3p improves vascular relaxation in uremia. Atherosclerosis 2018; 280:28-36. [PMID: 30453118 PMCID: PMC6591123 DOI: 10.1016/j.atherosclerosis.2018.11.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/31/2018] [Accepted: 11/09/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND AIMS Chronic kidney disease (CKD) is strongly associated with a high burden of cardiovascular morbidity and mortality. Therefore, we aimed to characterize the putative role of microRNAs (miR)s in uremic vascular remodelling and endothelial dysfunction. METHODS We investigated the expression pattern of miRs in two independent end-stage renal disease (ESRD) cohorts and in the animal model of uremic DBA/2 mice via quantitative RT-PCR. Moreover, DBA/2 mice were treated with intravenous injections of synthetic miR-142-3p mimic and were analysed for functional and morphological vascular changes by mass spectrometry and wire myography. RESULTS The expression pattern of miRs was regulated in ESRD patients and was reversible after kidney transplantation. Out of tested miRs, only blood miR-142-3p was negatively associated with carotid-femoral pulse-wave velocity in CKD 5D patients. We validated these findings in a murine uremic model and found similar suppression of miR-142-3p as well as decreased acetylcholine-mediated vascular relaxation of the aorta. Therefore, we designed experiments to restore bioavailability of aortic miR-142-3p in vivo via intravenous injection of synthetic miR-142-3p mimic. This intervention restored acetylcholine-mediated vascular relaxation. CONCLUSIONS Taken together, we provide compelling evidence, both in humans and in mice, that miR-142-3p constitutes a potential pharmacological agent to prevent endothelial dysfunction and increased arterial stiffness in ESRD.
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Affiliation(s)
- Máté Kétszeri
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Andrijana Kirsch
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University Graz, Graz, Austria; Department of Phoniatrics, ENT University Hospital Graz, Medical University of Graz, Austria
| | - Bianca Frauscher
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | | | - Agnes A Mooslechner
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Alexander H Kirsch
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Corinna Schabhuettl
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Ida Aringer
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Katharina Artinger
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Gudrun Pregartner
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
| | - Robert Ekart
- Department of Dialysis, Clinic for Internal Medicine, University Clinical Centre Maribor, Slovenia; Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - Silva Breznik
- Department of Radiology, University Clinical Centre Maribor, Slovenia
| | - Radovan Hojs
- Faculty of Medicine, University of Maribor, Maribor, Slovenia; Department of Nephrology, Clinic for Internal Medicine, University Clinical Center Maribor, Slovenia
| | - Walter Goessler
- Institute of Chemistry Analytical Chemistry, Karl-Franzens University Graz, Graz, Austria
| | - Irene Schilcher
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University Graz, Graz, Austria
| | - Helmut Müller
- Department of Surgery, Division of Transplantation Surgery, Medical University of Graz, Graz, Austria
| | - Barbara Obermayer-Pietsch
- Department of Internal Medicine, Division of Endocrinology and Diabetology, Medical University of Graz, Austria
| | - Saša Frank
- Gottfried Schatz Research Center for Cell Signaling, Metabolism and Aging, Molecular Biology and Biochemistry, Medical University Graz, Graz, Austria
| | - Alexander R Rosenkranz
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
| | - Philipp Eller
- Department of Internal Medicine, Intensive Care Unit, Medical University of Graz, Austria.
| | - Kathrin Eller
- Department of Internal Medicine, Clinical Division of Nephrology, Medical University of Graz, Graz, Austria
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12
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Sun Y, Kopp S, Strutz J, Gali CC, Zandl-Lang M, Fanaee-Danesh E, Kirsch A, Cvitic S, Frank S, Saffery R, Björkhem I, Desoye G, Wadsack C, Panzenboeck U. Gestational diabetes mellitus modulates cholesterol homeostasis in human fetoplacental endothelium. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:968-979. [PMID: 29778664 DOI: 10.1016/j.bbalip.2018.05.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 05/07/2018] [Accepted: 05/15/2018] [Indexed: 02/06/2023]
Abstract
Gestational diabetes mellitus (GDM) is associated with excessive oxidative stress which may affect placental vascular function. Cholesterol homeostasis is crucial for maintaining fetoplacental endothelial function. We aimed to investigate whether and how GDM affects cholesterol metabolism in human fetoplacental endothelial cells (HPEC). HPEC were isolated from fetal term placental arterial vessels of GDM or control subjects. Cellular reactive oxygen species (ROS) were detected by H2DCFDA fluorescent dye. Oxysterols were quantified by gas chromatography-mass spectrometry analysis. Genes and proteins involved in cholesterol homeostasis were detected by real-time PCR and immunoblotting, respectively. Cholesterol efflux was determined from [3H]-cholesterol labeled HPEC and [14C]-acetate was used as cholesterol precursor to measure cholesterol biosynthesis and esterification. We detected enhanced formation of ROS and of specific, ROS-derived oxysterols in HPEC isolated from GDM versus control pregnancies. ROS-generated oxysterols were simultaneously elevated in cord blood of GDM neonates. Liver-X receptor activation in control HPEC by synthetic agonist TO901319, 7-ketocholesterol, or 7β-hydroxycholesterol upregulated ATP-binding cassette transporters (ABC)A1 and ABCG1 expression, accompanied by increased cellular cholesterol efflux. Upregulation of ABCA1 and ABCG1 and increased cholesterol release to apoA-I and HDL3 (78 ± 17%, 40 ± 9%, respectively) were also observed in GDM versus control HPEC. The LXR antagonist GGPP reversed ABCA1 and ABCG1 upregulation and reduced the increased cholesterol efflux in GDM HPEC. Similar total cellular cholesterol levels were detected in control and GDM HPEC, while GDM enhanced cholesterol biosynthesis along with upregulated 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) and sterol O-acyltransferase 1 (SOAT1) mRNA and protein levels. Our results suggest that in GDM cellular cholesterol homeostasis in the fetoplacental endothelium is modulated via LXR activation and helps to maintain its proper functionality.
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Affiliation(s)
- Yidan Sun
- Immunology and Pathophysiology, Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Medical University of Graz, Austria
| | - Susanne Kopp
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria
| | - Jasmin Strutz
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria
| | - Chaitanya Chakravarthi Gali
- Immunology and Pathophysiology, Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Medical University of Graz, Austria
| | - Martina Zandl-Lang
- Immunology and Pathophysiology, Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Medical University of Graz, Austria
| | - Elham Fanaee-Danesh
- Immunology and Pathophysiology, Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Medical University of Graz, Austria
| | - Andrijana Kirsch
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Austria
| | - Silvija Cvitic
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria
| | - Saša Frank
- Institute of Molecular Biology and Biochemistry, Medical University of Graz, Austria
| | - Richard Saffery
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Australia; University of Melbourne, Department of Pediatrics, Melbourne, Australia
| | - Ingemar Björkhem
- Division of Clinical Chemistry, Karolinska Institute, Huddinge University Hospital, Sweden
| | - Gernot Desoye
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria
| | - Christian Wadsack
- Department of Obstetrics and Gynecology, Medical University of Graz, Austria; BioTechMed-Graz, Graz, Austria.
| | - Ute Panzenboeck
- Immunology and Pathophysiology, Otto Loewi Research Center for Vascular Biology, Immunology and Inflammation, Medical University of Graz, Austria.
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13
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Chang MC, Lee JJ, Chen YJ, Lin SI, Lin LD, Jein-Wen Liou E, Huang WL, Chan CP, Huang CC, Jeng JH. Lysophosphatidylcholine induces cytotoxicity/apoptosis and IL-8 production of human endothelial cells: Related mechanisms. Oncotarget 2017; 8:106177-106189. [PMID: 29290940 PMCID: PMC5739725 DOI: 10.18632/oncotarget.22425] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 10/29/2017] [Indexed: 12/31/2022] Open
Abstract
Increased levels of oxidized low-density lipoprotein oxLDL) are shown to elevate the risk of cardiovascular diseases such as atherosclerosis, thrombosis, stroke, and myocardial infarction. This is possibly due to the toxic effects of oxLDLs on vascular cells. Various oxLDLs including lysophosphatidylcholine (LPC) and 7-ketocholesterol injure vascular endothelial cells and stimulate inflammatory reaction. However the toxicity of LPC on endothelial cells is not clear. In this study, human endothelial cells were exposed to LPC. Cytotoxicity was measured by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide assay. Propidium iodide (PI) staining or PI/Annexin V dual staining flow cytometry were used to determine cell cycle progression and apoptosis. Reactive oxygen species (ROS) level was analyzed by DCFH-DA labeling flow cytometry. RNA and protein expression of endothelial cells was studied by reverse transcriptase-polymerase chain reaction and western blotting. IL-8 secretion was measured by enzyme-linked immunosorbant assay. LPC showed cytotoxicity to endothelial cells (>50 µg/ml). LPC induced cell cycle arrest and apoptosis with concomitant inhibition of cdc2 and cyclin B1 expression. LPC stimulated intracellular ROS production and ATM/Chk2, ATR/Chk1 and Akt activation. IL-8 expression and secretion in endothelial cells were induced by LPC. LPC-induced apoptosis, and IL-8 expression/secretion was attenuated by LY294002, a PI3K/Akt inhibitor. These results reveal that LPC is involved in the pathogenesis of atherosclerosis and vascular diseases by stimulation of inflammation and injury to endothelial cells. These events are related to ROS, ATM/Chk2, ATR/Chk2 and PI3K/Akt signaling. Understanding the toxic mechanisms of LPC is useful for future prevention and treatment atherosclerosis.
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Affiliation(s)
- Mei-Chi Chang
- Biomedical Science Team, Chang Gung University of Science and Technology, Kwei-Shan, Taoyuan City, Taiwan
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Jang-Jaer Lee
- School of Dentistry and Department of Dentistry, National Taiwan University Medical College and National Taiwan University Hospital, Taipei, Taiwan
| | - Yi-Jane Chen
- School of Dentistry and Department of Dentistry, National Taiwan University Medical College and National Taiwan University Hospital, Taipei, Taiwan
| | - Szu-I Lin
- Department of Dentistry, Municipal Taoyuan Hospital, Taoyuan City, Taiwan
| | - Li-Deh Lin
- School of Dentistry and Department of Dentistry, National Taiwan University Medical College and National Taiwan University Hospital, Taipei, Taiwan
| | | | - Wei-Ling Huang
- Department of Dentistry, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Chiu-Po Chan
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Chi-Chia Huang
- Department of Dentistry, Cardinal Tien Hospital, New Taipei City, Taiwan
| | - Jiiang-Huei Jeng
- School of Dentistry and Department of Dentistry, National Taiwan University Medical College and National Taiwan University Hospital, Taipei, Taiwan
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14
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Navia-Pelaez JM, Campos-Mota GP, Araujo de Souza JC, Aguilar EC, Stergiopulos N, Alvarez-Leite JI, Capettini LSA. nNOS uncoupling by oxidized LDL: Implications in atherosclerosis. Free Radic Biol Med 2017; 113:335-346. [PMID: 28970060 DOI: 10.1016/j.freeradbiomed.2017.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 09/13/2017] [Accepted: 09/21/2017] [Indexed: 02/03/2023]
Affiliation(s)
- Juliana Maria Navia-Pelaez
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Gianne Paul Campos-Mota
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Jessica Cristina Araujo de Souza
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Edenil Costa Aguilar
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil; Laboratory of Atherosclerosis and Nutritional Biochemistry, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Nikos Stergiopulos
- Laboratory of Hemodynamics and Cardiovascular Technology, Institute of Bioengineering, Ecole Polytechnique Federale de Lausanne, BM 5128 Station 17, CH-1015 Lausanne, Switzerland.
| | - Jacqueline Isaura Alvarez-Leite
- Laboratory of Atherosclerosis and Nutritional Biochemistry, Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
| | - Luciano Santos Aggum Capettini
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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15
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White CR, Datta G, Giordano S. High-Density Lipoprotein Regulation of Mitochondrial Function. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 982:407-429. [PMID: 28551800 DOI: 10.1007/978-3-319-55330-6_22] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Lipoproteins play a key role in regulating plasma and tissue levels of cholesterol. Apolipoprotein B (apoB)-containing lipoproteins, including chylomicrons, very-low density lipoprotein (VLDL) and low-density lipoprotein (LDL), serve as carriers of triglycerides and cholesterol and deliver these metabolites to peripheral tissues. In contrast, high-density lipoprotein (HDL) mediates Reverse Cholesterol Transport (RCT), a process by which excess cholesterol is removed from the periphery and taken up by hepatocytes where it is metabolized and excreted. Anti-atherogenic properties of HDL have been largely ascribed to apoA-I, the major protein component of the lipoprotein particle. The inflammatory response associated with atherosclerosis and ischemia-reperfusion (I-R) injury has been linked to the development of mitochondrial dysfunction. Under these conditions, an increase in reactive oxygen species (ROS) formation induces damage to mitochondrial structural elements, leading to a reduction in ATP synthesis and initiation of the apoptotic program. Recent studies suggest that HDL-associated apoA-I and lysosphingolipids attenuate mitochondrial injury by multiple mechanisms, including the suppression of ROS formation and induction of autophagy. Other apolipoproteins, however, present in lower abundance in HDL particles may exert opposing effects on mitochondrial function. This chapter examines the role of HDL-associated apolipoproteins and lipids in the regulation of mitochondrial function and bioenergetics.
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Affiliation(s)
- C Roger White
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Geeta Datta
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Samantha Giordano
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, AL, USA.
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16
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Campos-Mota GP, Navia-Pelaez JM, Araujo-Souza JC, Stergiopulos N, Capettini LSA. Role of ERK1/2 activation and nNOS uncoupling on endothelial dysfunction induced by lysophosphatidylcholine. Atherosclerosis 2016; 258:108-118. [PMID: 28235709 DOI: 10.1016/j.atherosclerosis.2016.11.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS Lysophosphatidylcholine (LPC) - a main component of oxidized LDL - is involved in endothelial dysfunction that precedes atherosclerosis, with an increased superoxide anions and a reduced NO production via endothelial NO synthase (eNOS) uncoupling. However, there is no evidence about the mechanisms involved in neuronal NOS (nNOS) uncoupling. Extracellular signal-regulated kinase (ERK) is related to the control of NO production and inflammatory gene transcription activation in atherosclerosis. Our aim was to investigate the role of nNOS/ERK1/2 pathway on endothelial dysfunction induced by LPC, in mouse aorta and human endothelial cells. METHODS Thoracic aorta from wild type mice was used to perform vascular reactivity studies in the presence or absence of LPC. Human endothelial cells were used to investigate the effect of LPC on expression of nNOS and his products NO and H2O2. RESULTS LPC reduced acetylcholine (ACh)-induced vasodilation in mouse aorta (EmaxCT/LPC = ∼95 ± 2/62 ± 3%, p = 0.0004) and increased phenylephrine-induced vasoconstriction (EmaxCT/LPC = ∼4 ± 0,1/6 ± 0,1 mN/mm, p = 0.0002), with a reduction in NO (fluorescence intensityCT/LPC = 91 ± 3/62±2 × 103, p = 0.0002) and H2O2 (fluorescence intensityCT/LPC = ∼16 ± 0,8/10 ± 0,7 × 103, p = 0.0041) production evocated by ACh. An inhibition of nNOS by TRIM (EmaxCT/CT+TRIM = ∼93 ± 1/43 ± 3%, p = 0,0048; EmaxLPC/LPC+TRIM = ∼62 ± 3/65 ± 3%) or H2O2 degradation by catalase (EmaxCT/CT+cat = ∼93 ± 1/46 ± 2%, p < 0,001; EmaxLPC/LPC+cat = ∼62,8 ± 3,2/60,5 ± 4,7%) reduced the relaxation in the control but not in LPC group. PD98059, an ERK1/2 inhibitor, abolished the increase in vasoconstriction in LPC-treated vessels (EmaxLPC/LPC+PD = ∼6 ± 0,1/3 ± 0,1 mN/mm, p = 0.0001). LPC also reduced the dimer/monomer proportion and increased nNOSser852 phosphorylation. CONCLUSIONS LPC induced nNOS uncoupling and nNOSSer852 phosphorylation, reduced NO and H2O2 production and improved superoxide production by modulating ERK1/2 activity in human and murine endothelial cells.
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Affiliation(s)
- Gianne P Campos-Mota
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Juliana M Navia-Pelaez
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Jessica Cristina Araujo-Souza
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | - Nikos Stergiopulos
- Laboratory of Hemodynamics and Cardiovascular Technology, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, BM 5128 Station 17, CH-1015 Lausanne, Switzerland
| | - Luciano S A Capettini
- Laboratory of Vascular Biology, Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil.
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