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Ko K, Choi S, Jo M, Kim C, Boonpraman N, Youm J, Yi SS. NOX4 and its association with myeloperoxidase and osteopontin in regulating endochondral ossification. J Vet Sci 2024; 25:25.e49. [PMID: 38910308 DOI: 10.4142/jvs.24076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/28/2024] [Accepted: 05/13/2024] [Indexed: 06/25/2024] Open
Abstract
IMPORTANCE Endochondral ossification plays an important role in skeletal development. Recent studies have suggested a link between increased intracellular reactive oxygen species (ROS) and skeletal disorders. Moreover, previous studies have revealed that increasing the levels of myeloperoxidase (MPO) and osteopontin (OPN) while inhibiting NADPH oxidase 4 (NOX4) can enhance bone growth. This investigation provides further evidence by showing a direct link between NOX4 and MPO, OPN in bone function. OBJECTIVE This study investigates NOX4, an enzyme producing hydrogen peroxide, in endochondral ossification and bone remodeling. NOX4's role in osteoblast formation and osteogenic signaling pathways is explored. METHODS Using NOX4-deficient (NOX4-/-) and ovariectomized (OVX) mice, we identify NOX4's potential mediators in bone maturation. RESULTS NOX4-/- mice displayed significant differences in bone mass and structure. Compared to the normal Control and OVX groups. Hematoxylin and eosin staining showed NOX4-/- mice had the highest trabecular bone volume, while OVX had the lowest. Proteomic analysis revealed significantly elevated MPO and OPN levels in bone marrow-derived cells in NOX4-/- mice. Immunohistochemistry confirmed increased MPO, OPN, and collagen II (COLII) near the epiphyseal plate. Collagen and chondrogenesis analysis supported enhanced bone development in NOX4-/- mice. CONCLUSIONS AND RELEVANCE Our results emphasize NOX4's significance in bone morphology, mesenchymal stem cell proteomics, immunohistochemistry, collagen levels, and chondrogenesis. NOX4 deficiency enhances bone development and endochondral ossification, potentially through increased MPO, OPN, and COLII expression. These findings suggest therapeutic implications for skeletal disorders.
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Affiliation(s)
- Kayoung Ko
- BK21 Four Project, Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Seohee Choi
- BK21 Four Project, Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Miri Jo
- BK21 Four Project, Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Chaeyoung Kim
- BK21 Four Project, Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Napissara Boonpraman
- Department of Translational Neuroscience, College of Human Medicine, Michigan State University, Grand Rapids, MI 48824, USA
| | - Jihyun Youm
- Department of Gerontology, Graduate School of East-West Medical Science, Kyunghee University, Yongin 17104, Korea
| | - Sun Shin Yi
- BK21 Four Project, Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
- iConnectome Co., LTD, Cheonan 31168, Korea.
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Zheng R, Moynahan K, Georgomanolis T, Pavlenko E, Geissen S, Mizi A, Grimm S, Nemade H, Rehimi R, Bastigkeit J, Lackmann JW, Adam M, Rada-Iglesias A, Nuernberg P, Klinke A, Poepsel S, Baldus S, Papantonis A, Kargapolova Y. Remodeling of the endothelial cell transcriptional program via paracrine and DNA-binding activities of MPO. iScience 2024; 27:108898. [PMID: 38322992 PMCID: PMC10844825 DOI: 10.1016/j.isci.2024.108898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 12/01/2023] [Accepted: 01/09/2024] [Indexed: 02/08/2024] Open
Abstract
Myeloperoxidase (MPO) is an enzyme that functions in host defense. MPO is released into the vascular lumen by neutrophils during inflammation and may adhere and subsequently penetrate endothelial cells (ECs) coating vascular walls. We show that MPO enters the nucleus of ECs and binds chromatin independently of its enzymatic activity. MPO drives chromatin decondensation at its binding sites and enhances condensation at neighboring regions. It binds loci relevant for endothelial-to-mesenchymal transition (EndMT) and affects the migratory potential of ECs. Finally, MPO interacts with the RNA-binding factor ILF3 thereby affecting its relative abundance between cytoplasm and nucleus. This interaction leads to change in stability of ILF3-bound transcripts. MPO-knockout mice exhibit reduced number of ECs at scar sites following myocardial infarction, indicating reduced neovascularization. In summary, we describe a non-enzymatic role for MPO in coordinating EndMT and controlling the fate of endothelial cells through direct chromatin binding and association with co-factors.
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Affiliation(s)
- Ruiyuan Zheng
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Kyle Moynahan
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Theodoros Georgomanolis
- Cologne Center for Genomics (CCG), University of Cologne, 50931 Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Egor Pavlenko
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Simon Geissen
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Athanasia Mizi
- Institute of Pathology, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Simon Grimm
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Harshal Nemade
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Rizwan Rehimi
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Jil Bastigkeit
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Jan-Wilm Lackmann
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
- Cluster of Excellence on Cellular Stress Responses in Age-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany
| | - Matti Adam
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Alvaro Rada-Iglesias
- Institute of Biomedicine and Biotechnology of Cantabria (IBBTEC), University of Cantabria, 39011 Santander, Spain
| | - Peter Nuernberg
- Cologne Center for Genomics (CCG), University of Cologne, 50931 Cologne, Germany
| | - Anna Klinke
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Simon Poepsel
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Stephan Baldus
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
| | - Argyris Papantonis
- Institute of Pathology, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Yulia Kargapolova
- Department III of Internal Medicine, Heart Center, Faculty of Medicine and University Hospital of Cologne, 50937 Cologne, Germany
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Harper A, Chapel M, Hodgson G, Malinowski K, Yates I, Garle M, Ralevic V. GYY4137, a hydrogen sulfide donor, protects against endothelial dysfunction in porcine coronary arteries exposed to myeloperoxidase and hypochlorous acid. Vascul Pharmacol 2023; 152:107199. [PMID: 37500030 DOI: 10.1016/j.vph.2023.107199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/12/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
BACKGROUND AND AIMS Myeloperoxidase (MPO) and its principal reaction product hypochlorous acid (HOCl) are part of the innate immune response but are also associated with endothelial dysfunction, thought to involve a reduction in nitric oxide (NO) bioavailability. We aimed to investigate the effect of MPO and HOCl on vasorelaxation of coronary arteries and to assess directly the involvement of NO. In addition, we hypothesised that the slow release hydrogen sulfide (H2S) donor GYY4137 would salvage coronary artery endothelial function in the presence of MPO and HOCl. METHODS AND RESULTS Contractility of porcine coronary artery segments was measured using isometric tension recording. Incubation with MPO (50 ng/ml) plus hydrogen peroxide (H2O2) (30 μM; substrate for MPO) impaired endothelium-dependent vasorelaxation to bradykinin in coronary arteries. HOCl (10-500 μM) also impaired endothelium-dependent relaxations. There was no effect of MPO plus H2O2, or HOCl, on endothelium-independent relaxations to 5'-N-ethylcarboxamidoadenosine and sodium nitroprusside. L-NAME (300 μM), a NO synthase inhibitor, attenuated bradykinin relaxations, leaving L-NAME-resistant relaxations to bradykinin mediated by endothelium-dependent hyperpolarization. In the presence of L-NAME, MPO plus H2O2 largely failed to impair endothelium-dependent relaxations to bradykinin. Similarly, HOCl failed to inhibit endothelium-dependent relaxations to bradykinin in the presence of L-NAME. GYY4137 (1-100 μM) protected endothelium-dependent relaxations to bradykinin from dysfunction caused by MPO plus H2O2, and HOCl, with no effect alone on bradykinin relaxation responses. The specific MPO inhibitor aminobenzoic acid hydrazide (ABAH) (1 and 10 μM) also protected against MPO plus H2O2-induced endothelial dysfunction (at 10 μM ABAH), but was less potent than GYY4137. CONCLUSIONS MPO plus H2O2, and HOCl, impair coronary artery endothelium-dependent vasorelaxation via inhibition of NO. GYY4137 protects against endothelial dysfunction in arteries exposed to MPO plus H2O2, and HOCl. H2S donors such as GYY4137 are possible therapeutic options to control excessive MPO activity in cardiovascular diseases.
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Affiliation(s)
- Andrew Harper
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Maike Chapel
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Grace Hodgson
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | | | - Imogen Yates
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Michael Garle
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Vera Ralevic
- School of Life Sciences, University of Nottingham, Nottingham, UK.
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Cosic-Mujkanovic N, Valadez-Cosmes P, Maitz K, Lueger A, Mihalic ZN, Runtsch MC, Kienzl M, Davies MJ, Chuang CY, Heinemann A, Schicho R, Marsche G, Kargl J. Myeloperoxidase Alters Lung Cancer Cell Function to Benefit Their Survival. Antioxidants (Basel) 2023; 12:1587. [PMID: 37627581 PMCID: PMC10451743 DOI: 10.3390/antiox12081587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/27/2023] Open
Abstract
Myeloperoxidase (MPO) is a neutrophil-derived enzyme that has been recently associated with tumour development. However, the mechanisms by which this enzyme exerts its functions remain unclear. In this study, we investigated whether myeloperoxidase can alter the function of A549 human lung cancer cells. We observed that MPO promoted the proliferation of cancer cells and inhibited their apoptosis. Additionally, it increased the phosphorylation of AKT and ERK. MPO was rapidly bound to and internalized by A549 cells, retaining its enzymatic activity. Furthermore, MPO partially translocated into the nucleus and was detected in the chromatin-enriched fraction. Effects of MPO on cancer cell function could be reduced when MPO uptake was blocked with heparin or upon inhibition of the enzymatic activity with the MPO inhibitor 4-aminobenzoic acid hydrazide (4-ABAH). Lastly, we have shown that tumour-bearing mice treated with 4-ABAH had reduced tumour burden when compared to control mice. Our results highlight the role of MPO as a neutrophil-derived enzyme that can alter the function of lung cancer cells.
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Affiliation(s)
- Nejra Cosic-Mujkanovic
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Paulina Valadez-Cosmes
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Kathrin Maitz
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Anna Lueger
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Zala N. Mihalic
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Marah C. Runtsch
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
| | - Melanie Kienzl
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Michael J. Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Christine Y. Chuang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Akos Heinemann
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Rudolf Schicho
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Gunther Marsche
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
| | - Julia Kargl
- Division of Pharmacology, Otto Loewi Research Center, Medical University of Graz, 8010 Graz, Austria
- BioTechMed-Graz, 8010 Graz, Austria
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Sun XJ, Li ZY, Chen M. Pathogenesis of anti-neutrophil cytoplasmic antibody-associated vasculitis. RHEUMATOLOGY AND IMMUNOLOGY RESEARCH 2023; 4:11-21. [PMID: 37138650 PMCID: PMC10150877 DOI: 10.2478/rir-2023-0003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 02/08/2023] [Indexed: 05/05/2023]
Abstract
Anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) encompasses a group of potentially life-threatening disorders characterized by necrotizing small vessel vasculitis with positive serum ANCA. To date, the pathogenesis of AAV has not been fully elucidated, but remarkable progress has been achieved in the past few decades. In this review, we summarize the mechanism of AAV. The pathogenesis of AAV involves various factors. ANCA, neutrophils, and the complement system play key roles in disease initiation and progression, forming a feedback amplification loop leading to vasculitic injury. Neutrophils activated by ANCA undergo respiratory burst and degranulation, as well as releasing neutrophils extracellular traps (NETs), thus causing damage to vascular endothelial cells. Activated neutrophils could further activate the alternative complement pathway, leading to the generation of complement 5a (C5a), which amplifies the inflammatory response by priming neutrophils for ANCA-mediated overactivation. Neutrophils stimulated with C5a and ANCA could also activate the coagulation system, generate thrombin, and subsequently cause platelet activation. These events in turn augment complement alternative pathway activation. Moreover, disturbed B-cell and T-cell immune homeostasis is also involved in disease development. In-depth investigation in pathogenesis of AAV might help to offer more effective targeted therapies.
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Affiliation(s)
- Xiao-Jing Sun
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing100034, China
- Peking University Institute of Nephrology, Beijing100034, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing100034, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing100034, China
- Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing100034, China
| | - Zhi-Ying Li
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing100034, China
- Peking University Institute of Nephrology, Beijing100034, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing100034, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing100034, China
- Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing100034, China
| | - Min Chen
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing100034, China
- Peking University Institute of Nephrology, Beijing100034, China
- Key Laboratory of Renal Disease, Ministry of Health of China, Beijing100034, China
- Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing100034, China
- Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases, Chinese Academy of Medical Sciences, Beijing100034, China
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Florez-Barros F, Bearder S, Kull B, Freeman A, Mócsai A, Robson MG. Myeloid expression of the anti-apoptotic protein Mcl1 is required in anti-myeloperoxidase vasculitis but myeloperoxidase inhibition is not protective. Kidney Int 2023; 103:134-143. [PMID: 36154801 PMCID: PMC10166712 DOI: 10.1016/j.kint.2022.08.028] [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: 09/23/2021] [Revised: 08/08/2022] [Accepted: 08/12/2022] [Indexed: 01/10/2023]
Abstract
Antibodies to neutrophil and monocyte myeloperoxidase and proteinase 3 are a feature of anti-neutrophil cytoplasmic antibody vasculitis, a disease with significant morbidity for which new treatments are needed. Mice with a myeloid-specific deletion of the anti-apoptotic protein Mcl1 have reduced numbers of circulating neutrophils. Here, we assessed if myeloid-specific Mcl1 was required in murine anti-myeloperoxidase vasculitis and whether inhibition of myeloperoxidase was protective. In a murine model of anti-neutrophil cytoplasmic antibody vasculitis, induced by anti-myeloperoxidase antibody, mice with a myeloid-specific deletion of Mcl1 were protected from disease. They had fewer crescents, neutrophils, and macrophages in the glomeruli, lower serum creatinine levels and reduced albuminuria compared with controls. At baseline and day six after disease induction they had fewer circulating neutrophils than controls. At day six there were also fewer circulating monocytes. Myeloperoxidase inhibition with AZD5904 had no effect on histological or biochemical parameters of disease, and there was also no reduction in albuminuria at day one, two, five or seven after disease induction. These findings persisted when disease was induced without granulocyte-colony stimulating factor, which increases disease severity. A second myeloperoxidase inhibitor, AZM198, also showed no evidence of an effect, although both AZD5904 and AZM198 inhibited human neutrophil extracellular trap formation in vitro. Thus, our results show that while myeloid-specific Mcl1 is required in this model of anti-myeloperoxidase vasculitis, myeloperoxidase inhibition is not protective.
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Affiliation(s)
- Fernanda Florez-Barros
- Department of Inflammation Biology, School of Immunology and Microbial Sciences, King's College London, London, UK
| | - Siobhan Bearder
- Department of Inflammation Biology, School of Immunology and Microbial Sciences, King's College London, London, UK
| | - Bengt Kull
- Research and Early Development, AstraZeneca, Gothenburg, Sweden
| | | | - Attila Mócsai
- Department of Physiology, Semmelweis University, School of Medicine, Budapest, Hungary
| | - Michael G Robson
- Department of Inflammation Biology, School of Immunology and Microbial Sciences, King's College London, London, UK.
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Miranda KM, Ridnour LA, Cheng RYS, Wink DA, Thomas DD. The Chemical Biology of NO that Regulates Oncogenic Signaling and Metabolism: NOS2 and Its Role in Inflammatory Disease. Crit Rev Oncog 2023; 28:27-45. [PMID: 37824385 DOI: 10.1615/critrevoncog.2023047302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Nitric oxide (NO) and the enzyme that synthesizes it, nitric oxide synthase 2 (NOS2), have emerged as key players in inflammation and cancer. Expression of NOS2 in tumors has been correlated both with positive outcomes and with poor prognoses. The chemistry of NO is the major determinate to the biological outcome and the concentration of NO, which can range over five orders of magnitude, is critical in determining which pathways are activated. It is the activation of specific oncogenic and immunological mechanisms that shape the outcome. The kinetics of specific reactions determine the mechanisms of action. In this review, the relevant reactions of NO and related species are discussed with respect to these oncogenic and immunological signals.
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Affiliation(s)
| | - Lisa A Ridnour
- Laboratory of Cancer Immunometabolism, National Cancer Institute, Frederick, Maryland
| | - Robert Y S Cheng
- Laboratory of Cancer Immunometabolism, National Cancer Institute, Frederick, Maryland
| | - David A Wink
- Cancer and Inflammation Program, Laboratory of Cancer Immunometabolism, National Cancer Institute, Frederick, Maryland
| | - Douglas D Thomas
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
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Arnhold J, Malle E. Halogenation Activity of Mammalian Heme Peroxidases. Antioxidants (Basel) 2022; 11:antiox11050890. [PMID: 35624754 PMCID: PMC9138014 DOI: 10.3390/antiox11050890] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 12/10/2022] Open
Abstract
Mammalian heme peroxidases are fascinating due to their unique peculiarity of oxidizing (pseudo)halides under physiologically relevant conditions. These proteins are able either to incorporate oxidized halides into substrates adjacent to the active site or to generate different oxidized (pseudo)halogenated species, which can take part in multiple (pseudo)halogenation and oxidation reactions with cell and tissue constituents. The present article reviews basic biochemical and redox mechanisms of (pseudo)halogenation activity as well as the physiological role of heme peroxidases. Thyroid peroxidase and peroxidasin are key enzymes for thyroid hormone synthesis and the formation of functional cross-links in collagen IV during basement membrane formation. Special attention is directed to the properties, enzymatic mechanisms, and resulting (pseudo)halogenated products of the immunologically relevant proteins such as myeloperoxidase, eosinophil peroxidase, and lactoperoxidase. The potential role of the (pseudo)halogenated products (hypochlorous acid, hypobromous acid, hypothiocyanite, and cyanate) of these three heme peroxidases is further discussed.
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Affiliation(s)
- Jürgen Arnhold
- Medical Faculty, Institute of Medical Physics and Biophysics, Leipzig University, 04107 Leipzig, Germany
- Correspondence: (J.A.); or (E.M.)
| | - Ernst Malle
- Gottfried Schatz Research Center, Division of Molecular Biology and Biochemistry, Medical University of Graz, 8010 Graz, Austria
- Correspondence: (J.A.); or (E.M.)
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Jamuna S, Ashokkumar R, Devaraj SN. Amelioration of C-Reactive Protein and Lectin Like Oxidized Low Density Lipoprotein Receptor Complex Induced Endothelial Dysfunction by Oligomeric Proanthocyanidins. Appl Biochem Biotechnol 2022; 195:2664-2686. [PMID: 35357665 DOI: 10.1007/s12010-021-03792-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2021] [Indexed: 01/08/2023]
Abstract
C-reactive protein (CRP) is a well-established biochemical marker for atherosclerosis. Modification of LDL inside the artery wall favors the elevation of this acute phase protein. Hence, this mechanism is considered an important factor to trigger the monocyte to macrophages differentiation which results in the formation of foam cells. Therefore, this key event should be targeted and focused on how this complex (OxLDL + CRP) proceeds to endothelial dysfunction. Oligomeric proanthocyanidins (OPC) is a well-known cardioprotective flavon-3-ols. The present study is challenged between the cardioprotective roles of OPC against the deleterious effect of OxLDL + CRP complex upon endothelial cells. Protein-protein docking was carried out between CRP and LOX-1. This docked protein complex was again docked with OPC to show the inhibitory mechanism of CRP binding with LOX-1. OPC showed a promising inhibitory mechanism against OxLDL + CRP complex. Docking studies showed that in the absence of ligands (OPC), binding of CRP and LOX-1 was greater and vice versa in the presence of ligands. Based on these molecular docking results, in vitro studies have been carried out. The monolayer of endothelial cells was incubated with THP-1 monocytes for 48 h, induced with OxLDL (10 μg/ml) + CRP (15 μg/ml) and cotreated with OPC (100 μg/ml). Morphological changes, cell migration assay, and capillary tube forming assay were carried out. Myeloperoxidase levels were estimated to determine the adhesion of monocytes onto EC monolayer. RT-PCR analysis of L-Selectin was also done. The quantification of NO levels and analysis of mRNA expressions of eNOS was to determine the nitric oxide demand caused due to OxLDL + CRP complex. LOX-1, scavenger receptor levels were analyzed by mRNA expression. Proinflammatory markers such as IL-6, MCP-1, and IL-1β were studied. Accumulation of ROS levels was measured fluorimetrically using DCF-DA staining. Mitochondrial membrane potential was determined by JC-1 dye and cell cycle analysis was done by FACS analysis. To emphasis the results, the OPC-treated group showed decreased levels of proinflammatory markers, LOX-1 and L-selectin levels. Endothelial nitric oxide levels were increased upon OPC treatment and reduction in the ROS levels was also observed. Endothelial cells apoptosis was prevented by OPC. To conclude, OxLDL + CRP complex inhibitory effects of OPC could maintain the normal homeostasis.
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Affiliation(s)
- Sankar Jamuna
- Department of Biochemistry, University of Madras, Guindy campus, Chennai, 600025, India
| | - Rathinavel Ashokkumar
- Department of Biochemistry, University of Madras, Guindy campus, Chennai, 600025, India
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Understanding Myeloperoxidase-Induced Damage to HDL Structure and Function in the Vessel Wall: Implications for HDL-Based Therapies. Antioxidants (Basel) 2022; 11:antiox11030556. [PMID: 35326206 PMCID: PMC8944857 DOI: 10.3390/antiox11030556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/23/2022] Open
Abstract
Atherosclerosis is a disease of increased oxidative stress characterized by protein and lipid modifications in the vessel wall. One important oxidative pathway involves reactive intermediates generated by myeloperoxidase (MPO), an enzyme present mainly in neutrophils and monocytes. Tandem MS analysis identified MPO as a component of lesion derived high-density lipoprotein (HDL), showing that the two interact in the arterial wall. MPO modifies apolipoprotein A1 (apoA-I), paraoxonase 1 and certain HDL-associated phospholipids in human atheroma. HDL isolated from atherosclerotic plaques depicts extensive MPO mediated posttranslational modifications, including oxidation of tryptophan, tyrosine and methionine residues, and carbamylation of lysine residues. In addition, HDL associated plasmalogens are targeted by MPO, generating 2-chlorohexadecanal, a pro-inflammatory and endothelial barrier disrupting lipid that suppresses endothelial nitric oxide formation. Lesion derived HDL is predominantly lipid-depleted and cross-linked and exhibits a nearly 90% reduction in lecithin-cholesterol acyltransferase activity and cholesterol efflux capacity. Here we provide a current update of the pathophysiological consequences of MPO-induced changes in the structure and function of HDL and discuss possible therapeutic implications and options. Preclinical studies with a fully functional apoA-I variant with pronounced resistance to oxidative inactivation by MPO-generated oxidants are currently ongoing. Understanding the relationships between pathophysiological processes that affect the molecular composition and function of HDL and associated diseases is central to the future use of HDL in diagnostics, therapy, and ultimately disease management.
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Lorey MB, Öörni K, Kovanen PT. Modified Lipoproteins Induce Arterial Wall Inflammation During Atherogenesis. Front Cardiovasc Med 2022; 9:841545. [PMID: 35310965 PMCID: PMC8927694 DOI: 10.3389/fcvm.2022.841545] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 01/26/2022] [Indexed: 12/15/2022] Open
Abstract
Circulating apolipoprotein B-containing lipoproteins, notably the low-density lipoproteins, enter the inner layer of the arterial wall, the intima, where a fraction of them is retained and modified by proteases, lipases, and oxidizing agents and enzymes. The modified lipoproteins and various modification products, such as fatty acids, ceramides, lysophospholipids, and oxidized lipids induce inflammatory reactions in the macrophages and the covering endothelial cells, initiating an increased leukocyte diapedesis. Lipolysis of the lipoproteins also induces the formation of cholesterol crystals with strong proinflammatory properties. Modified and aggregated lipoproteins, cholesterol crystals, and lipoproteins isolated from human atherosclerotic lesions, all can activate macrophages and thereby induce the secretion of proinflammatory cytokines, chemokines, and enzymes. The extent of lipoprotein retention, modification, and aggregation have been shown to depend largely on differences in the composition of the circulating lipoprotein particles. These properties can be modified by pharmacological means, and thereby provide opportunities for clinical interventions regarding the prevention and treatment of atherosclerotic vascular diseases.
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Affiliation(s)
- Martina B. Lorey
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
- Molecular and Integrative Biosciences, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Katariina Öörni
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
- Molecular and Integrative Biosciences, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
- *Correspondence: Katariina Öörni
| | - Petri T. Kovanen
- Atherosclerosis Research Laboratory, Wihuri Research Institute, Helsinki, Finland
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12
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Impact of Uremic Toxins on Endothelial Dysfunction in Chronic Kidney Disease: A Systematic Review. Int J Mol Sci 2022; 23:ijms23010531. [PMID: 35008960 PMCID: PMC8745705 DOI: 10.3390/ijms23010531] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 12/13/2022] Open
Abstract
Patients with chronic kidney disease (CKD) are at a highly increased risk of cardiovascular complications, with increased vascular inflammation, accelerated atherogenesis and enhanced thrombotic risk. Considering the central role of the endothelium in protecting from atherogenesis and thrombosis, as well as its cardioprotective role in regulating vasorelaxation, this study aimed to systematically integrate literature on CKD-associated endothelial dysfunction, including the underlying molecular mechanisms, into a comprehensive overview. Therefore, we conducted a systematic review of literature describing uremic serum or uremic toxin-induced vascular dysfunction with a special focus on the endothelium. This revealed 39 studies analyzing the effects of uremic serum or the uremic toxins indoxyl sulfate, cyanate, modified LDL, the advanced glycation end products N-carboxymethyl-lysine and N-carboxyethyl-lysine, p-cresol and p-cresyl sulfate, phosphate, uric acid and asymmetric dimethylarginine. Most studies described an increase in inflammation, oxidative stress, leukocyte migration and adhesion, cell death and a thrombotic phenotype upon uremic conditions or uremic toxin treatment of endothelial cells. Cellular signaling pathways that were frequently activated included the ROS, MAPK/NF-κB, the Aryl-Hydrocarbon-Receptor and RAGE pathways. Overall, this review provides detailed insights into pathophysiological and molecular mechanisms underlying endothelial dysfunction in CKD. Targeting these pathways may provide new therapeutic strategies reducing increased the cardiovascular risk in CKD.
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13
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Valadez-Cosmes P, Raftopoulou S, Mihalic ZN, Marsche G, Kargl J. Myeloperoxidase: Growing importance in cancer pathogenesis and potential drug target. Pharmacol Ther 2021; 236:108052. [PMID: 34890688 DOI: 10.1016/j.pharmthera.2021.108052] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/24/2021] [Accepted: 12/02/2021] [Indexed: 02/07/2023]
Abstract
Myeloperoxidase is a heme-peroxidase which makes up approximately 5% of the total dry cell weight of neutrophils where it is predominantly found in the primary (azurophilic) granules. Other cell types, such as monocytes and certain macrophage subpopulations also contain myeloperoxidase, but to a much lesser extent. Initially, the function of myeloperoxidase had been mainly associated with its ability as a catalyzer of reactive oxidants that help to clear pathogens. However, over the past years non-canonical functions of myeloperoxidase have been described both in health and disease. Attention has been specially focused on inflammatory diseases, in which an exacerbate infiltration of leukocytes can favor a poorly-controlled production and release of myeloperoxidase and its oxidants. There is compelling evidence that myeloperoxidase derived oxidants contribute to tissue damage and the development and propagation of acute and chronic vascular inflammation. Recently, neutrophils have attracted much attention within the large diversity of innate immune cells that are part of the tumor microenvironment. In particular, neutrophil-derived myeloperoxidase may play an important role in cancer development and progression. This review article aims to provide a comprehensive overview of the roles of myeloperoxidase in the development and progression of cancer. We propose future research approaches and explore prospects of inhibiting myeloperoxidase as a strategy to fight against cancer.
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Affiliation(s)
- Paulina Valadez-Cosmes
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Sofia Raftopoulou
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Zala Nikita Mihalic
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Gunther Marsche
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria
| | - Julia Kargl
- Otto Loewi Research Center, Division of Pharmacology, Medical University of Graz, Graz, Austria.
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14
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Arnhold J. Heme Peroxidases at Unperturbed and Inflamed Mucous Surfaces. Antioxidants (Basel) 2021; 10:antiox10111805. [PMID: 34829676 PMCID: PMC8614983 DOI: 10.3390/antiox10111805] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 01/15/2023] Open
Abstract
In our organism, mucous surfaces are important boundaries against the environmental milieu with defined fluxes of metabolites through these surfaces and specific rules for defense reactions. Major mucous surfaces are formed by epithelia of the respiratory system and the digestive tract. The heme peroxidases lactoperoxidase (LPO), myeloperoxidase (MPO), and eosinophil peroxidase (EPO) contribute to immune protection at epithelial surfaces and in secretions. Whereas LPO is secreted from epithelial cells and maintains microbes in surface linings on low level, MPO and EPO are released from recruited neutrophils and eosinophils, respectively, at inflamed mucous surfaces. Activated heme peroxidases are able to oxidize (pseudo)halides to hypohalous acids and hypothiocyanite. These products are involved in the defense against pathogens, but can also contribute to cell and tissue damage under pathological conditions. This review highlights the beneficial and harmful functions of LPO, MPO, and EPO at unperturbed and inflamed mucous surfaces. Among the disorders, special attention is directed to cystic fibrosis and allergic reactions.
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Affiliation(s)
- Jürgen Arnhold
- Medical Faculty, Institute of Medical Physics and Biophysics, Leipzig University, 04107 Leipzig, Germany
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15
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Hawkins CL, Davies MJ. Role of myeloperoxidase and oxidant formation in the extracellular environment in inflammation-induced tissue damage. Free Radic Biol Med 2021; 172:633-651. [PMID: 34246778 DOI: 10.1016/j.freeradbiomed.2021.07.007] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/04/2021] [Accepted: 07/05/2021] [Indexed: 12/30/2022]
Abstract
The heme peroxidase family generates a battery of oxidants both for synthetic purposes, and in the innate immune defence against pathogens. Myeloperoxidase (MPO) is the most promiscuous family member, generating powerful oxidizing species including hypochlorous acid (HOCl). Whilst HOCl formation is important in pathogen removal, this species is also implicated in host tissue damage and multiple inflammatory diseases. Significant oxidant formation and damage occurs extracellularly as a result of MPO release via phagolysosomal leakage, cell lysis, extracellular trap formation, and inappropriate trafficking. MPO binds strongly to extracellular biomolecules including polyanionic glycosaminoglycans, proteoglycans, proteins, and DNA. This localizes MPO and subsequent damage, at least partly, to specific sites and species, including extracellular matrix (ECM) components and plasma proteins/lipoproteins. Biopolymer-bound MPO retains, or has enhanced, catalytic activity, though evidence is also available for non-catalytic effects. These interactions, particularly at cell surfaces and with the ECM/glycocalyx induce cellular dysfunction and altered gene expression. MPO binds with higher affinity to some damaged ECM components, rationalizing its accumulation at sites of inflammation. MPO-damaged biomolecules and fragments act as chemo-attractants and cell activators, and can modulate gene and protein expression in naïve cells, consistent with an increasing cycle of MPO adhesion, activity, damage, and altered cell function at sites of leukocyte infiltration and activation, with subsequent tissue damage and dysfunction. MPO levels are used clinically both diagnostically and prognostically, and there is increasing interest in strategies to prevent MPO-mediated damage; therapeutic aspects are not discussed as these have been reviewed elsewhere.
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Affiliation(s)
- Clare L Hawkins
- Department of Biomedical Sciences, University of Copenhagen, Panum Institute, Blegdamsvej 3B, Copenhagen N, DK-2200, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, University of Copenhagen, Panum Institute, Blegdamsvej 3B, Copenhagen N, DK-2200, Denmark.
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16
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Maiocchi S, Ku J, Hawtrey T, De Silvestro I, Malle E, Rees M, Thomas SR, Morris JC. Polyamine-Conjugated Nitroxides Are Efficacious Inhibitors of Oxidative Reactions Catalyzed by Endothelial-Localized Myeloperoxidase. Chem Res Toxicol 2021; 34:1681-1692. [PMID: 34085520 DOI: 10.1021/acs.chemrestox.1c00094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The heme enzyme myeloperoxidase (MPO) is a key mediator of endothelial dysfunction and a therapeutic target in cardiovascular disease. During inflammation, MPO released by circulating leukocytes is internalized by endothelial cells and transcytosed into the subendothelial extracellular matrix of diseased vessels. At this site, MPO mediates endothelial dysfunction by catalytically consuming nitric oxide (NO) and producing reactive oxidants, hypochlorous acid (HOCl) and the nitrogen dioxide radical (•NO2). Accordingly, there is interest in developing MPO inhibitors that effectively target endothelial-localized MPO. Here we studied a series of piperidine nitroxides conjugated to polyamine moieties as novel endothelial-targeted MPO inhibitors. Electron paramagnetic resonance analysis of cell lysates showed that polyamine conjugated nitroxides were efficiently internalized into endothelial cells in a heparan sulfate dependent manner. Nitroxides effectively inhibited the consumption of MPO's substrate hydrogen peroxide (H2O2) and formation of HOCl catalyzed by endothelial-localized MPO, with their efficacy dependent on both nitroxide and conjugated-polyamine structure. Nitroxides also differentially inhibited protein nitration catalyzed by both purified and endothelial-localized MPO, which was dependent on •NO2 scavenging rather than MPO inhibition. Finally, nitroxides uniformly inhibited the catalytic consumption of NO by MPO in human plasma. These studies show for the first time that nitroxides effectively inhibit local oxidative reactions catalyzed by endothelial-localized MPO. Novel polyamine-conjugated nitroxides, ethylenediamine-TEMPO and putrescine-TEMPO, emerged as efficacious nitroxides uniquely exhibiting high endothelial cell uptake and efficient inhibition of MPO-catalyzed HOCl production, protein nitration, and NO oxidation. Polyamine-conjugated nitroxides represent a versatile class of antioxidant drugs capable of targeting endothelial-localized MPO during vascular inflammation.
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Affiliation(s)
- Sophie Maiocchi
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia.,Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.,School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jacqueline Ku
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Tom Hawtrey
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Irene De Silvestro
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Ernst Malle
- Gottfried Schatz Research Center, Molecular Biology & Biochemistry, Medical University of Graz, 8036 Graz, Austria
| | - Martin Rees
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Shane R Thomas
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jonathan C Morris
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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17
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Rehring JF, Bui TM, Galán-Enríquez CS, Urbanczyk JM, Ren X, Wiesolek HL, Sullivan DP, Sumagin R. Released Myeloperoxidase Attenuates Neutrophil Migration and Accumulation in Inflamed Tissue. Front Immunol 2021; 12:654259. [PMID: 33959129 PMCID: PMC8093447 DOI: 10.3389/fimmu.2021.654259] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 04/06/2021] [Indexed: 01/13/2023] Open
Abstract
Neutrophil (PMN) recruitment to sites of insult is critical for host defense, however excessive PMN activity and tissue accumulation can lead to exacerbated inflammation and injury. Myeloperoxidase (MPO) is a PMN azurophilic granule enzyme, which together with H2O2, forms a powerful antimicrobial system designed to kill ingested bacteria. Intriguingly, in addition to intracellular killing of invading microorganisms and extracellular tissue damage due generation of ROS, soluble MPO has been directly implicated in modulating cellular responses and tissue homeostasis. In the current work, we used several models of inflammation, murine and human PMNs and state-of-the-art intravital microscopy to examine the effect of MPO on PMN migration and tissue accumulation. We found that in the absence of functional MPO (MPO knockout, KO mice) inflammatory PMN tissue accumulation was significantly enhanced. We determined that the elevated numbers of PMNs in MPO knockout mice was not due to enhanced viability, but due to increased migratory ability. Acute PMN migration in models of zymosan-induced peritonitis or ligated intestinal loops induced by intraluminal administration of PMN-chemokine CXCL1 was increased over 2-fold in MPO KO compared to wild type (WT) mice. Using real-time intravital imaging of inflamed mouse cremaster muscle and ex vivo PMN co-culture with inflamed endothelial cells (ECs) we demonstrate that elevated migration of MPO KO mice was due to enhanced adhesive interactions. In contrast, addition of soluble recombinant MPO both in vivo and ex vivo diminished PMN adhesion and migration. Although MPO has been previously suggested to bind CD11b, we found no significant difference in CD11b expression in either resting or activated PMNs and further showed that the MPO binding to the PMN surface is not specific to CD11b. As such, our data identify MPO as a novel regulator of PMN trafficking in inflammation.
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Affiliation(s)
- Jacob F Rehring
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Triet M Bui
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | | | - Jessica M Urbanczyk
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Xingsheng Ren
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Hannah L Wiesolek
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - David P Sullivan
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Ronen Sumagin
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
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18
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Kargapolova Y, Geißen S, Zheng R, Baldus S, Winkels H, Adam M. The Enzymatic and Non-Enzymatic Function of Myeloperoxidase (MPO) in Inflammatory Communication. Antioxidants (Basel) 2021; 10:antiox10040562. [PMID: 33916434 PMCID: PMC8066882 DOI: 10.3390/antiox10040562] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/23/2021] [Accepted: 03/30/2021] [Indexed: 12/14/2022] Open
Abstract
Myeloperoxidase is a signature enzyme of polymorphonuclear neutrophils in mice and humans. Being a component of circulating white blood cells, myeloperoxidase plays multiple roles in various organs and tissues and facilitates their crosstalk. Here, we describe the current knowledge on the tissue- and lineage-specific expression of myeloperoxidase, its well-studied enzymatic activity and incoherently understood non-enzymatic role in various cell types and tissues. Further, we elaborate on Myeloperoxidase (MPO) in the complex context of cardiovascular disease, innate and autoimmune response, development and progression of cancer and neurodegenerative diseases.
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19
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Thai T, Zhong F, Dang L, Chan E, Ku J, Malle E, Geczy CL, Keaney JF, Thomas SR. Endothelial-transcytosed myeloperoxidase activates endothelial nitric oxide synthase via a phospholipase C-dependent calcium signaling pathway. Free Radic Biol Med 2021; 166:255-264. [PMID: 33539947 PMCID: PMC10686581 DOI: 10.1016/j.freeradbiomed.2020.12.448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/21/2020] [Accepted: 12/29/2020] [Indexed: 12/24/2022]
Abstract
During vascular inflammation, the leukocyte-derived enzyme myeloperoxidase (MPO) is transcytosed across the endothelium and into the sub-endothelial extracellular matrix, where it promotes endothelial dysfunction by catalytically consuming nitric oxide (NO) produced by endothelial NO synthase (eNOS). In the presence of chloride ions and hydrogen peroxide (H2O2), MPO forms the oxidant hypochlorous acid (HOCl). Here we examined the short-term implications of HOCl produced by endothelial-transcytosed MPO for eNOS activity. Incubation of MPO with cultured aortic endothelial cells (ECs) resulted in its transport into the sub-endothelium. Exposure of MPO-containing ECs to low micromolar concentrations of H2O2 yielded enhanced rates of H2O2 consumption that correlated with HOCl formation and increased eNOS enzyme activity. The MPO-dependent activation of eNOS occurred despite reduced cellular uptake of the eNOS substrate l-arginine, which involved a decrease in the maximal activity (Vmax), but not substrate affinity (Km), of the major endothelial l-arginine transporter, cationic amino acid transporter-1. Activation of eNOS in MPO-containing ECs exposed to H2O2 involved a rapid elevation in cytosolic calcium and increased eNOS phosphorylation at Ser-1179 and de-phosphorylation at Thr-497. These signaling events were attenuated by intracellular calcium chelation, removal of extracellular calcium and inhibition of phospholipase C. This study shows that stimulation of endothelial-transcytosed MPO activates eNOS by promoting phospholipase C-dependent calcium signaling and altered eNOS phosphorylation at Ser-1179 and Thr-497. This may constitute a compensatory signaling response of ECs aimed at maintaining eNOS activity and NO production in the face of MPO-catalyzed oxidative stress.
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Affiliation(s)
- Thuan Thai
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia; School of Education, University of Notre Dame Australia, Sydney, NSW, Australia
| | - Fei Zhong
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Lei Dang
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Enoch Chan
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Jacqueline Ku
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Ernst Malle
- Gottfried Schatz Research Center, Division of Molecular Biology & Biochemistry, Medical University of Graz, Graz, Austria
| | - Carolyn L Geczy
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - John F Keaney
- Cardiovascular Medicine, Brigham and Women's Hospital, Harvard University, Boston, MA, USA
| | - Shane R Thomas
- School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
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20
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Myeloperoxidase: Mechanisms, reactions and inhibition as a therapeutic strategy in inflammatory diseases. Pharmacol Ther 2021; 218:107685. [DOI: 10.1016/j.pharmthera.2020.107685] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/09/2020] [Indexed: 12/17/2022]
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21
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Kolářová H, Víteček J, Černá A, Černík M, Přibyl J, Skládal P, Potěšil D, Ihnatová I, Zdráhal Z, Hampl A, Klinke A, Kubala L. Myeloperoxidase mediated alteration of endothelial function is dependent on its cationic charge. Free Radic Biol Med 2021; 162:14-26. [PMID: 33271281 DOI: 10.1016/j.freeradbiomed.2020.11.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 11/02/2020] [Accepted: 11/10/2020] [Indexed: 12/20/2022]
Abstract
Endothelial cell (EC) glycocalyx (GLX) comprise a multicomponent layer of proteoglycans and glycoproteins. Alteration of its integrity contributes to chronic vascular inflammation and leads to the development of cardiovascular diseases. Myeloperoxidase (MPO), a highly abundant enzyme released by polymorphonuclear neutrophils, binds to the GLX and deleteriously affects vascular EC functions. The focus of this study was to elucidate the mechanisms of MPO-mediated alteration of GLX molecules, and to unravel subsequent changes in endothelial integrity and function. MPO binding to GLX of human ECs and subsequent internalization was mediated by cell surface heparan sulfate chains. Moreover, interaction of MPO, which is carrying a cationic charge, with anionic glycosaminoglycans (GAGs) resulted in reduction of their relative charge. By means of micro-viscometry and atomic force microscopy, we disclosed that MPO can crosslink GAG chains. MPO-dependent modulation of GLX structure was further supported by alteration of wheat germ agglutinin staining. Increased expression of ICAM-1 documented endothelial cell activation by both catalytically active and also inactive MPO. Furthermore, MPO increased vascular permeability connected with reorganization of intracellular junctions, however, this was dependent on MPO's catalytic activity. Novel proteins interacting with MPO during transcytosis were identified by proteomic analysis. Altogether, these findings provide evidence that MPO through interaction with GAGs modulates overall charge of the GLX, causing modification of its structure and thus affecting EC function. Importantly, our results also suggest a number of proteins interacting with MPO that possess a variety of cellular localizations and functions.
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Affiliation(s)
- Hana Kolářová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Jan Víteček
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Anna Černá
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Marek Černík
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Jan Přibyl
- Central European Institute for Technology, Masaryk University, Kamenice 5, Brno, Czech Republic
| | - Petr Skládal
- Central European Institute for Technology, Masaryk University, Kamenice 5, Brno, Czech Republic
| | - David Potěšil
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
| | - Ivana Ihnatová
- Institute of Biostatistics and Analyses, Masaryk University, Kamenice 3, Brno, Czech Republic
| | - Zbyněk Zdráhal
- Central European Institute for Technology, Masaryk University, Kamenice 5, Brno, Czech Republic; National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
| | - Aleš Hampl
- Faculty of Medicine, Department of Histology and Embryology, Masaryk University, Kamenice 3, 625 00, Brno, Czech Republic
| | - Anna Klinke
- Clinic of General and Interventional Cardiology/Angiology, Agnes Wittenborg Institute of Translational Cardiovascular Research, Herz- und Diabeteszentrum NRW, Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Lukáš Kubala
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic.
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22
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Grégory Franck. Role of mechanical stress and neutrophils in the pathogenesis of plaque erosion. Atherosclerosis 2020; 318:60-69. [PMID: 33190807 DOI: 10.1016/j.atherosclerosis.2020.11.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/05/2020] [Accepted: 11/03/2020] [Indexed: 02/05/2023]
Abstract
Mechanical stress is a well-recognized driver of plaque rupture. Likewise, investigating the role of mechanical forces in plaque erosion has recently begun to provide some important insights, yet the knowledge is by far less advanced. The most significant example is that of shear stress, which has early been proposed as a possible driver for focal endothelial death and denudation. Recent findings using optical coherence tomography, computational sciences and mechanical models show that plaque erosion occurs most likely around atheromatous plaque throats with specific stress pattern. In parallel, we have recently shown that neutrophil-dependent inflammation promotes plaque erosion, possibly through a noxious action on ECs. Most importantly, spontaneous thrombosis - associated or not with EC denudation - can be impacted by hemodynamics, and it is now established that neutrophils promote thrombosis and platelet activation, highlighting a potential relationship between, mechanical stress, inflammation, and EC loss in the setting of coronary plaque erosion. Here, we review our current knowledge regarding the implication of both mechanical stress and neutrophils, and we discuss their implication in the promotion of plaque erosion via EC loss and thrombosis.
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Affiliation(s)
- Grégory Franck
- Inserm LVTS U1148. CHU Bichat, 46 Rue Henri Huchard, 75018, Paris, France.
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23
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Myeloperoxidase: A versatile mediator of endothelial dysfunction and therapeutic target during cardiovascular disease. Pharmacol Ther 2020; 221:107711. [PMID: 33137376 DOI: 10.1016/j.pharmthera.2020.107711] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/01/2020] [Indexed: 02/06/2023]
Abstract
Myeloperoxidase (MPO) is a prominent mammalian heme peroxidase and a fundamental component of the innate immune response against microbial pathogens. In recent times, MPO has received considerable attention as a key oxidative enzyme capable of impairing the bioactivity of nitric oxide (NO) and promoting endothelial dysfunction; a clinically relevant event that manifests throughout the development of inflammatory cardiovascular disease. Increasing evidence indicates that during cardiovascular disease, MPO is released intravascularly by activated leukocytes resulting in its transport and sequestration within the vascular endothelium. At this site, MPO catalyzes various oxidative reactions that are capable of promoting vascular inflammation and impairing NO bioactivity and endothelial function. In particular, MPO catalyzes the production of the potent oxidant hypochlorous acid (HOCl) and the catalytic consumption of NO via the enzyme's NO oxidase activity. An emerging paradigm is the ability of MPO to also influence endothelial function via non-catalytic, cytokine-like activities. In this review article we discuss the implications of our increasing knowledge of the versatility of MPO's actions as a mediator of cardiovascular disease and endothelial dysfunction for the development of new pharmacological agents capable of effectively combating MPO's pathogenic activities. More specifically, we will (i) discuss the various transport mechanisms by which MPO accumulates into the endothelium of inflamed or diseased arteries, (ii) detail the clinical and basic scientific evidence identifying MPO as a significant cause of endothelial dysfunction and cardiovascular disease, (iii) provide an up-to-date coverage on the different oxidative mechanisms by which MPO can impair endothelial function during cardiovascular disease including an evaluation of the contributions of MPO-catalyzed HOCl production and NO oxidation, and (iv) outline the novel non-enzymatic mechanisms of MPO and their potential contribution to endothelial dysfunction. Finally, we deliver a detailed appraisal of the different pharmacological strategies available for targeting the catalytic and non-catalytic modes-of-action of MPO in order to protect against endothelial dysfunction in cardiovascular disease.
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Arnhold J. The Dual Role of Myeloperoxidase in Immune Response. Int J Mol Sci 2020; 21:E8057. [PMID: 33137905 PMCID: PMC7663354 DOI: 10.3390/ijms21218057] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/25/2020] [Accepted: 10/28/2020] [Indexed: 12/14/2022] Open
Abstract
The heme protein myeloperoxidase (MPO) is a major constituent of neutrophils. As a key mediator of the innate immune system, neutrophils are rapidly recruited to inflammatory sites, where they recognize, phagocytose, and inactivate foreign microorganisms. In the newly formed phagosomes, MPO is involved in the creation and maintenance of an alkaline milieu, which is optimal in combatting microbes. Myeloperoxidase is also a key component in neutrophil extracellular traps. These helpful properties are contrasted by the release of MPO and other neutrophil constituents from necrotic cells or as a result of frustrated phagocytosis. Although MPO is inactivated by the plasma protein ceruloplasmin, it can interact with negatively charged components of serum and the extracellular matrix. In cardiovascular diseases and many other disease scenarios, active MPO and MPO-modified targets are present in atherosclerotic lesions and other disease-specific locations. This implies an involvement of neutrophils, MPO, and other neutrophil products in pathogenesis mechanisms. This review critically reflects on the beneficial and harmful functions of MPO against the background of immune response.
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Affiliation(s)
- Jürgen Arnhold
- Institute of Medical Physics and Biophysics, Medical Faculty, Leipzig University, 04 107 Leipzig, Germany
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El Kazzi M, Rayner BS, Chami B, Dennis JM, Thomas SR, Witting PK. Neutrophil-Mediated Cardiac Damage After Acute Myocardial Infarction: Significance of Defining a New Target Cell Type for Developing Cardioprotective Drugs. Antioxid Redox Signal 2020; 33:689-712. [PMID: 32517486 PMCID: PMC7475094 DOI: 10.1089/ars.2019.7928] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Significance: Acute myocardial infarction (AMI) is a leading cause of death worldwide. Post-AMI survival rates have increased with the introduction of angioplasty as a primary coronary intervention. However, reperfusion after angioplasty represents a clinical paradox, restoring blood flow to the ischemic myocardium while simultaneously inducing ion and metabolic imbalances that stimulate immune cell recruitment and activation, mitochondrial dysfunction and damaging oxidant production. Recent Advances: Preclinical data indicate that these metabolic imbalances contribute to subsequent heart failure through sustaining local recruitment of inflammatory leukocytes and oxidative stress, cardiomyocyte death, and coronary microvascular disturbances, which enhance adverse cardiac remodeling. Both left ventricular dysfunction and heart failure are strongly linked to inflammation and immune cell recruitment to the damaged myocardium. Critical Issues: Overall, therapeutic anti-inflammatory and antioxidant agents identified in preclinical trials have failed in clinical trials. Future Directions: The versatile neutrophil-derived heme enzyme, myeloperoxidase (MPO), is gaining attention as an important oxidative mediator of reperfusion injury, vascular dysfunction, adverse ventricular remodeling, and atrial fibrillation. Accordingly, there is interest in therapeutically targeting neutrophils and MPO activity in the setting of heart failure. Herein, we discuss the role of post-AMI inflammation linked to myocardial damage and heart failure, describe previous trials targeting inflammation and oxidative stress post-AMI, highlight the potential adverse impact of neutrophil and MPO, and detail therapeutic options available to target MPO clinically in AMI patients.
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Affiliation(s)
- Mary El Kazzi
- Discipline of Pathology, Charles Perkins Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
| | | | - Belal Chami
- Discipline of Pathology, Charles Perkins Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Joanne Marie Dennis
- Discipline of Pathology, Charles Perkins Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
| | - Shane Ross Thomas
- Department of Pathology, School of Medical Sciences, The University of New South Wales, Sydney, Australia
| | - Paul Kenneth Witting
- Discipline of Pathology, Charles Perkins Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
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Vanichkitrungruang S, Chuang CY, Hawkins CL, Davies MJ. Myeloperoxidase-derived damage to human plasma fibronectin: Modulation by protein binding and thiocyanate ions (SCN -). Redox Biol 2020; 36:101641. [PMID: 32863239 PMCID: PMC7378696 DOI: 10.1016/j.redox.2020.101641] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 12/29/2022] Open
Abstract
Endothelial cell dysfunction is an early event in cardiovascular disease and atherosclerosis. The origin of this dysfunction is unresolved, but accumulating evidence implicates damaging oxidants, including hypochlorous acid (HOCl), a major oxidant produced by myeloperoxidase (MPO), during chronic inflammation. MPO is released extracellularly by activated leukocytes and binds to extracellular molecules including fibronectin, a major matrix glycoprotein involved in endothelial cell binding. We hypothesized that MPO binding might influence the modifications induced on fibronectin, when compared to reagent HOCl, with this including alterations to the extent of damage to protein side-chains, modified structural integrity, changes to functional domains, and impact on naïve human coronary artery endothelial cell (HCAEC) adhesion and metabolic activity. The effect of increasing concentrations of the alternative MPO substrate thiocyanate (SCN-), which might decrease HOCl formation were also examined. Exposure of fibronectin to MPO/H2O2/Cl- is shown to result in damage to the functionally important cell-binding and heparin-binding fragments, gross structural changes to the protein, and altered HCAEC adhesion and activity. Differences were observed between stoichiometric, and above-stoichiometric MPO concentrations consistent with an effect of MPO binding to fibronectin. In contrast, MPO/H2O2/SCN- induced much less marked changes and limited protein damage. Addition of increasing SCN- concentrations to the MPO/H2O2/Cl- system provided protection, with 20 μM of this anion rescuing damage to functionally-important domains, decreasing chemical modification, and maintaining normal HCAEC behavior. Modulating MPO binding to fibronectin, or enhancing SCN- levels at sites of inflammation may therefore limit MPO-mediated damage, and be of therapeutic value.
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Affiliation(s)
- Siriluck Vanichkitrungruang
- The Heart Research Institute, Newtown, NSW, Australia; Faculty of Medicine, The University of Sydney, NSW, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
| | - Christine Y Chuang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
| | - Clare L Hawkins
- The Heart Research Institute, Newtown, NSW, Australia; Faculty of Medicine, The University of Sydney, NSW, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
| | - Michael J Davies
- The Heart Research Institute, Newtown, NSW, Australia; Faculty of Medicine, The University of Sydney, NSW, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark.
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The leucine-rich repeat domain of human peroxidasin 1 promotes binding to laminin in basement membranes. Arch Biochem Biophys 2020; 689:108443. [PMID: 32485152 DOI: 10.1016/j.abb.2020.108443] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/26/2020] [Accepted: 05/27/2020] [Indexed: 01/09/2023]
Abstract
Human peroxidasin 1 (PXDN) is a homotrimeric multidomain heme peroxidase and essential for tissue development and architecture. It has a biosynthetic function and catalyses the hypobromous acid-mediated formation of specific covalent sulfilimine (SN) bonds, which cross-link type IV collagen chains in basement membranes. Currently, it is unknown whether and which domain(s) [i.e. leucine-rich repeat domain (LRR), immunoglobulin domains, peroxidase domain, von Willebrand factor type C domain] of PXDN interact with the polymeric networks of the extracellular matrix (ECM), and how these interactions integrate and regulate the enzyme's cross-linking activity, without imparting oxidative damage to the ECM. In this study, we probed the interactions of four PXDN constructs with different domain compositions with components of a basement membrane extract by immunoprecipitation. Strong binding of the LRR-containing construct was detected with the major ECM protein laminin. Analysis of these interactions by surface plasmon resonance spectroscopy revealed similar kinetics and affinities of binding of the LRR-containing construct to human and murine laminin-111, with calculated dissociation constants of 1.0 and 1.5 μM, respectively. The findings are discussed with respect to the recently published in-solution structures of the PXDN constructs and the proposed biological role of this peroxidase.
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28
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Hage C, Michaëlsson E, Kull B, Miliotis T, Svedlund S, Linde C, Donal E, Daubert JC, Gan LM, Lund LH. Myeloperoxidase and related biomarkers are suggestive footprints of endothelial microvascular inflammation in HFpEF patients. ESC Heart Fail 2020; 7:1534-1546. [PMID: 32424988 PMCID: PMC7373930 DOI: 10.1002/ehf2.12700] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 03/16/2020] [Accepted: 03/18/2020] [Indexed: 12/17/2022] Open
Abstract
Aims In heart failure (HF) with preserved ejection fraction (HFpEF), microvascular inflammation is proposed as an underlying mechanism. Myeloperoxidase (MPO) is associated with vascular dysfunction and prognosis in congestive HF. Methods and results MPO, MPO‐related biomarkers, and echocardiography were assessed in 86 patients, 4–8 weeks after presentation with acute HF (EF ≥ 45%), and in 46 healthy controls. Patients were followed up for median 579 days (Q1;Q3 276;1178) regarding the composite endpoint all‐cause mortality or HF hospitalization. Patients were 73 years old, 51% were female, EF was 64% (Q1;Q3 58;68), E/e′ was ratio 10.8 (8.3;14.0), and left atrial volume index (LAVI) was 43 mL/m2 (38;52). Controls were 60 (57;62) years old (vs. patients; P < 0.001), 24% were female (P = 0.005), and left ventricular EF was 63% (59;66; P = 0.790). MPO was increased in HFpEF compared with controls, 101 (81;132) vs. 86 (74;101 ng/mL, P = 0.015), as was uric acid 369 (314;439) vs. 289 (252;328 μmol/L, P < 0.001), calprotectin, asymmetric dimethyl arginine (ADMA), and symmetric dimethyl arginine (SDMA), while arginine was decreased. MPO correlated with uric acid (r = 0.26; P = 0.016). In patients with E/e′ > 14, uric acid and SDMA were elevated (421 vs. 344 μM, P = 0.012; 0.54 vs. 0.47 μM, P = 0.039, respectively), and MPO was 121 vs. 98 ng/mL (P = 0.090). The ratios of arginine/ADMA (112 vs. 162; P < 0.001) and ADMA/SDMA (1.36 vs. 1.17; P = 0.002) were decreased in HFpEF patients, suggesting reduced NO availability and increased enzymatic clearance of ADMA, respectively. Uric acid independently predicted the endpoint [hazard ratio (HR) 3.76 (95% CI 1.19–11.85; P = 0.024)] but not MPO [HR 1.48 (95% CI 0.70–3.14; P = 0.304)] or the other biomarkers. Conclusions In HFpEF, MPO‐dependent oxidative stress reflected by uric acid and calprotectin is increased, and SDMA is associated with diastolic dysfunction and uric acid with outcome. This suggests microvascular neutrophil involvement mirroring endothelial dysfunction, a central component of the HFpEF syndrome and a potential treatment target.
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Affiliation(s)
- Camilla Hage
- Heart and Vascular Theme, Heart Failure Section, Karolinska University Hospital, SE-171 76, Stockholm, Sweden.,Department of Medicine, Cardiology Unit, Karolinska Institutet, Stockholm, Sweden
| | - Erik Michaëlsson
- Research and Early Development Cardiovascular Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Bengt Kull
- Research and Early Development Cardiovascular Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Tasso Miliotis
- Research and Early Development Cardiovascular Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Sara Svedlund
- Department of Clinical Physiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Cecilia Linde
- Department of Medicine, Cardiology Unit, Karolinska Institutet, Stockholm, Sweden
| | - Erwan Donal
- Département de Cardiologie and CIC-IT U 804, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Jean-Claude Daubert
- Département de Cardiologie and CIC-IT U 804, Centre Hospitalier Universitaire de Rennes, Rennes, France
| | - Li-Ming Gan
- Research and Early Development Cardiovascular Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden.,Department of Molecular and Clinical Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Lars H Lund
- Heart and Vascular Theme, Heart Failure Section, Karolinska University Hospital, SE-171 76, Stockholm, Sweden.,Department of Medicine, Cardiology Unit, Karolinska Institutet, Stockholm, Sweden
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Davies MJ, Hawkins CL. The Role of Myeloperoxidase in Biomolecule Modification, Chronic Inflammation, and Disease. Antioxid Redox Signal 2020; 32:957-981. [PMID: 31989833 DOI: 10.1089/ars.2020.8030] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Significance: The release of myeloperoxidase (MPO) by activated leukocytes is critical in innate immune responses. MPO produces hypochlorous acid (HOCl) and other strong oxidants, which kill bacteria and other invading pathogens. However, MPO also drives the development of numerous chronic inflammatory pathologies, including atherosclerosis, neurodegenerative disease, lung disease, arthritis, cancer, and kidney disease, which are globally responsible for significant patient mortality and morbidity. Recent Advances: The development of imaging approaches to precisely identify the localization of MPO and the molecular targets of HOCl in vivo is an important advance, as typically the involvement of MPO in inflammatory disease has been inferred by its presence, together with the detection of biomarkers of HOCl, in biological fluids or diseased tissues. This will provide valuable information in regard to the cell types responsible for releasing MPO in vivo, together with new insight into potential therapeutic opportunities. Critical Issues: Although there is little doubt as to the value of MPO inhibition as a protective strategy to mitigate tissue damage during chronic inflammation in experimental models, the impact of long-term inhibition of MPO as a therapeutic strategy for human disease remains uncertain, in light of the potential effects on innate immunity. Future Directions: The development of more targeted MPO inhibitors or a treatment regimen designed to reduce MPO-associated host tissue damage without compromising pathogen killing by the innate immune system is therefore an important future direction. Similarly, a partial MPO inhibition strategy may be sufficient to maintain adequate bacterial activity while decreasing the propagation of inflammatory pathologies.
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Affiliation(s)
- Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen N, Denmark
| | - Clare L Hawkins
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen N, Denmark
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Lapenna D, Ciofani G, Lelli Chiesa P, Porreca E. Evidence for oxidative and not reductive stress in the aged rabbit heart. Exp Gerontol 2020; 134:110871. [PMID: 32035990 DOI: 10.1016/j.exger.2020.110871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 02/03/2020] [Accepted: 02/05/2020] [Indexed: 12/12/2022]
Abstract
Reductive stress, which is due to a paradoxical excess of antioxidants such as reduced glutathione (GSH) and GSH-related enzymes associated with decreased oxidant levels, has emerged as a pathogenetic mechanism of myocardial damage in pathological conditions such as protein aggregation cardiomyopathy. Notably, in the aged heart a cardiomyopathy-like pathology occurs leading to myocardial dysfunction. Whether reductive stress, or instead its counterpart oxidative stress, is operative in the aged mammalian heart needs to be elucidated also for the different therapeutic implications of such redox stress conditions. In the present investigation, we assessed GSH and the specific enzymatic activities of γ-glutamylcysteine synthetase (γ-GCS), glutathione reductase (GSSG-Red) and selenium-dependent glutathione peroxidase (GSH-Px) as endogenous antioxidants, together with oxidized glutathione (GSSG) and the glutathione redox ratio (GSH/GSSG), in the aerobically perfused hearts of aged rabbits (about 4.5 years old) and young adult control rabbits (3-4 months old). We also assessed in the aged and control hearts H2O2 and catalytically active low molecular weight iron (LMWI) as oxidant forces, as well as fluorescent damage products of lipid peroxidation (FDPL) and protein carbonyls (PC) as biomarkers of lipid and protein oxidation. Moreover, the effects of 4.5 mM N-acetylcysteine (NAC) as reducing thiol antioxidant were studied on hemodynamic parameters and lipid peroxidation in the perfused hearts of the aged and control rabbits. The levels of GSH and of the GSH/GSSG ratio were lower, and those of GSSG higher, in the aged than in the control hearts. The aged hearts were also characterized by decreased activities of the antioxidant enzymes γ-GCS, GSSG-Red and GSH-Px, as well as by heightened levels of H2O2, LMWI, FDPL and PC, highlighting the occurrence of aging-dependent oxidative stress. Associated with such biochemical alterations, hemodynamic dysfunction occurred in the aged rabbit hearts, as evidenced by lowered developed pressure (DP) and enhanced end-diastolic pressure (EDP) with decreased coronary flow (CF). Remarkably, NAC administration significantly improved DP and EDP, and lowered lipid peroxidation, electively in the aged hearts. In conclusion, oxidative and not reductive stress is operative in the aged rabbit heart, whose hemodynamic dysfunction is improved by NAC together with reduction in myocardial lipid peroxidation.
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Affiliation(s)
- Domenico Lapenna
- Dipartimento di Medicina e Scienze dell'Invecchiamento, Università degli Studi "G. d'Annunzio" Chieti Pescara, 66100 Chieti, Italy; Laboratorio di Fisiopatologia dello Stress Ossidativo, Center for Advanced Studies and Technology (CAST, former CeSI-MeT, Center of Excellence on Aging), Università degli Studi "G. d'Annunzio" Chieti Pescara, 66100 Chieti, Italy.
| | - Giuliano Ciofani
- Dipartimento di Medicina e Scienze dell'Invecchiamento, Università degli Studi "G. d'Annunzio" Chieti Pescara, 66100 Chieti, Italy; Laboratorio di Fisiopatologia dello Stress Ossidativo, Center for Advanced Studies and Technology (CAST, former CeSI-MeT, Center of Excellence on Aging), Università degli Studi "G. d'Annunzio" Chieti Pescara, 66100 Chieti, Italy
| | - Pierluigi Lelli Chiesa
- Dipartimento di Medicina e Scienze dell'Invecchiamento, Università degli Studi "G. d'Annunzio" Chieti Pescara, 66100 Chieti, Italy
| | - Ettore Porreca
- Dipartimento di Scienze Mediche, Orali e Biotecnologiche, Università degli Studi "G. d'Annunzio" Chieti Pescara, 66100 Chieti, Italy
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Volkman R, Ben-Zur T, Kahana A, Garty BZ, Offen D. Myeloperoxidase Deficiency Inhibits Cognitive Decline in the 5XFAD Mouse Model of Alzheimer's Disease. Front Neurosci 2019; 13:990. [PMID: 31611761 PMCID: PMC6769081 DOI: 10.3389/fnins.2019.00990] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 09/03/2019] [Indexed: 12/21/2022] Open
Abstract
Myeloperoxidase (MPO) is an enzyme expressed mostly by neutrophils and is a primary mediator of neutrophils oxidative stress response. While a profound body of evidence associates neutrophil-derived MPO in the pathogenesis of Alzheimer’s disease (AD), this role has not been assessed in an animal model of AD. Here, we produced hematologic chimerism in the 5XFAD mouse model of AD, with MPO deficient mice, resulting in 5XFAD with hematologic MPO deficiency (5XFAD-MPO KO). Behavioral examinations of 5XFAD-MPO KO showed significant superior performance in spatial learning and memory, associative learning, and anxiety/risk assessment behavior, as compared to 5XFAD mice transplanted with WT cells (5XFAD-WT). Hippocampal immunohistochemical and mRNA expression analyses showed significantly reduced levels of inflammatory mediators in 5XFAD-MPO KO mice with no apparent differences in the numbers of amyloid-β plaques. In addition, immunoblotting and mRNA analyses showed significantly reduced levels of APOE in 5XFAD-MPO KO. Together, these results indicate a substantial involvement of neutrophil-derived MPO in the pathology of 5XFAD model of AD and suggest MPO as a potential therapeutic target in AD.
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Affiliation(s)
- Rotem Volkman
- Department of Human Genetics and Biochemistry, Felsenstein Medical Research Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Tali Ben-Zur
- Department of Human Genetics and Biochemistry, Felsenstein Medical Research Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | | | - Daniel Offen
- Department of Human Genetics and Biochemistry, Felsenstein Medical Research Center, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
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Manchanda K, Kolarova H, Kerkenpaß C, Mollenhauer M, Vitecek J, Rudolph V, Kubala L, Baldus S, Adam M, Klinke A. MPO (Myeloperoxidase) Reduces Endothelial Glycocalyx Thickness Dependent on Its Cationic Charge. Arterioscler Thromb Vasc Biol 2019; 38:1859-1867. [PMID: 29903730 DOI: 10.1161/atvbaha.118.311143] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Objective- The leukocyte heme-enzyme MPO (myeloperoxidase) exerts proinflammatory effects on the vascular system primarily linked to its catalytic properties. Recent studies have shown that MPO, depending on its cationic charge, mediates neutrophil recruitment and activation. Here, we further investigated MPO's extracatalytic properties and its effect on endothelial glycocalyx (EG) integrity. Approach and Results- In vivo staining of murine cremaster muscle vessels with Alcian Blue 8GX provided evidence of an MPO-dependent decrease in anionic charge of the EG. MPO binding to the glycocalyx was further characterized using Chinese hamster ovary cells and its glycosaminoglycan mutants-pgsA-745 (mutant Chinese hamster ovary cells lacking heparan sulfate and chondroitin sulfate glycosaminoglycan) and pgsD-677 (mutant Chinese hamster ovary cells lacking heparan sulfate glycosaminoglycan), which revealed heparan sulfate as the main mediator of MPO binding. Further, EG integrity was assessed in terms of thickness using intravital microscopy of murine cremaster muscle. A significant reduction in EG thickness was observed on infusion of catalytically active MPO, as well as mutant inactive MPO and cationic polymer polylysine. Similar effects were also observed in wild-type mice after a local inflammatory stimulus but not in MPO-knockout mice. The reduction in EG thickness was reversed after removal of vessel-bound MPO, suggesting a possible physical collapse of the EG. Last, experiments with in vivo neutrophil depletion revealed that MPO also induced neutrophil-mediated shedding of the EG core protein, Sdc1 (syndecan-1). Conclusions- These findings provide evidence that MPO, via ionic interaction with heparan sulfate side chains, can cause neutrophil-dependent Sdc1 shedding and collapse of the EG structure.
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Affiliation(s)
- Kashish Manchanda
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Cologne Cardiovascular Research Center, University of Cologne, Germany (K.M., S.B., A.K.)
| | - Hana Kolarova
- Institute of Biophysics AS CR, Brno, Czech Republic (H.K., J.V., L.K.)
- International Clinical Research Center, St. Anne's University Hospital Brno, Czech Republic (H.K., J.V., L.K., A.K.)
| | - Christina Kerkenpaß
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
| | - Martin Mollenhauer
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
| | - Jan Vitecek
- Institute of Biophysics AS CR, Brno, Czech Republic (H.K., J.V., L.K.)
- International Clinical Research Center, St. Anne's University Hospital Brno, Czech Republic (H.K., J.V., L.K., A.K.)
| | - Volker Rudolph
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
| | - Lukas Kubala
- Institute of Biophysics AS CR, Brno, Czech Republic (H.K., J.V., L.K.)
- International Clinical Research Center, St. Anne's University Hospital Brno, Czech Republic (H.K., J.V., L.K., A.K.)
| | - Stephan Baldus
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Cologne Cardiovascular Research Center, University of Cologne, Germany (K.M., S.B., A.K.)
| | - Matti Adam
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
| | - Anna Klinke
- From the Department of Cardiology, Heart Center, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- Center for Molecular Medicine Cologne, University of Cologne, Germany (K.M., C.K., M.M., V.R., S.B., M.A., A.K.)
- International Clinical Research Center, St. Anne's University Hospital Brno, Czech Republic (H.K., J.V., L.K., A.K.)
- Cologne Cardiovascular Research Center, University of Cologne, Germany (K.M., S.B., A.K.)
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Hartman CL, Ford DA. MPO (Myeloperoxidase) Caused Endothelial Dysfunction. Arterioscler Thromb Vasc Biol 2019; 38:1676-1677. [PMID: 30354198 DOI: 10.1161/atvbaha.118.311427] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Celine L Hartman
- From the Edward A. Doisy Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University School of Medicine, MO
| | - David A Ford
- From the Edward A. Doisy Department of Biochemistry and Molecular Biology and Center for Cardiovascular Research, Saint Louis University School of Medicine, MO
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Cheng D, Talib J, Stanley CP, Rashid I, Michaëlsson E, Lindstedt EL, Croft KD, Kettle AJ, Maghzal GJ, Stocker R. Inhibition of MPO (Myeloperoxidase) Attenuates Endothelial Dysfunction in Mouse Models of Vascular Inflammation and Atherosclerosis. Arterioscler Thromb Vasc Biol 2019; 39:1448-1457. [DOI: 10.1161/atvbaha.119.312725] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Objective—
Inflammation-driven endothelial dysfunction initiates and contributes to the progression of atherosclerosis, and MPO (myeloperoxidase) has been implicated as a potential culprit. On release by circulating phagocytes, MPO is thought to contribute to endothelial dysfunction by limiting NO bioavailability via formation of reactive oxidants including hypochlorous acid. However, it remains largely untested whether specific pharmacological inhibition of MPO attenuates endothelial dysfunction. We, therefore, tested the ability of a mechanism-based MPO inhibitor, AZM198, to inhibit endothelial dysfunction in models of vascular inflammation.
Approach and Results—
Three models of inflammation were used: femoral cuff, the tandem stenosis model of plaque rupture in
Apoe
−/−
mice, and C57BL/6J mice fed a high-fat, high-carbohydrate diet as a model of insulin resistance. Endothelial dysfunction was observed in all 3 models, and oral administration of AZM198 significantly improved endothelial function in the femoral cuff and tandem stenosis models only. Improvement in endothelial function was associated with decreased arterial MPO activity, determined by the in vivo conversion of hydroethidine to 2-chloroethidium, without affecting circulating inflammatory cytokines or arterial MPO content. Mechanistic studies in
Mpo
−/−
mice confirmed the contribution of MPO to endothelial dysfunction and revealed oxidation of sGC (soluble guanylyl cyclase) as the underlying cause of the observed limited NO bioavailability.
Conclusions—
Pharmacological inhibition of MPO is a potential strategy to limit endothelial dysfunction in vascular inflammation.
Visual Overview—
An online visual overview is available for this article.
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Affiliation(s)
- David Cheng
- From the Vascular Biology Division, Victor Chang Cardiac Research Institute, NSW, Australia (D.C., J.T., C.P.S., I.R., G.J.M., R.S.)
- St Vincent’s Clinical School, University of New South Wales Medicine, Australia (D.C., J.T., C.P.S., R.S.)
| | - Jihan Talib
- From the Vascular Biology Division, Victor Chang Cardiac Research Institute, NSW, Australia (D.C., J.T., C.P.S., I.R., G.J.M., R.S.)
- St Vincent’s Clinical School, University of New South Wales Medicine, Australia (D.C., J.T., C.P.S., R.S.)
| | - Christopher P. Stanley
- From the Vascular Biology Division, Victor Chang Cardiac Research Institute, NSW, Australia (D.C., J.T., C.P.S., I.R., G.J.M., R.S.)
- St Vincent’s Clinical School, University of New South Wales Medicine, Australia (D.C., J.T., C.P.S., R.S.)
| | - Imran Rashid
- From the Vascular Biology Division, Victor Chang Cardiac Research Institute, NSW, Australia (D.C., J.T., C.P.S., I.R., G.J.M., R.S.)
| | - Erik Michaëlsson
- Bioscience Heart Failure, Cardiovascular, Renal and Metabolism, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden (E.M., E.-L.L.)
| | - Eva-Lotte Lindstedt
- Bioscience Heart Failure, Cardiovascular, Renal and Metabolism, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden (E.M., E.-L.L.)
| | - Kevin D. Croft
- School of Biomedical Science, University of Western Australia, Perth (K.D.C.)
| | - Anthony J. Kettle
- Centre for Free Radical Research, University of Otago Christchurch, New Zealand (A.J.K.)
| | - Ghassan J. Maghzal
- From the Vascular Biology Division, Victor Chang Cardiac Research Institute, NSW, Australia (D.C., J.T., C.P.S., I.R., G.J.M., R.S.)
| | - Roland Stocker
- From the Vascular Biology Division, Victor Chang Cardiac Research Institute, NSW, Australia (D.C., J.T., C.P.S., I.R., G.J.M., R.S.)
- St Vincent’s Clinical School, University of New South Wales Medicine, Australia (D.C., J.T., C.P.S., R.S.)
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Nybo T, Davies MJ, Rogowska-Wrzesinska A. Analysis of protein chlorination by mass spectrometry. Redox Biol 2019; 26:101236. [PMID: 31181457 PMCID: PMC6557747 DOI: 10.1016/j.redox.2019.101236] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/28/2019] [Accepted: 05/31/2019] [Indexed: 01/04/2023] Open
Abstract
Chlorination of tyrosine is a commonly known effect/consequence of myeloperoxidase activity at sites of inflammation, and detection of 3-chlorotyrosine has been used as biomarker for inflammatory diseases. However, few studies have addressed site specific chlorination in proteins, and no methods for large scale chloroproteomics studies have yet been published. In this study, we present an optimized mass spectrometry based protocol to identify and quantify chlorinated peptides from single proteins modified by HOCl (100 and 500 μM, within estimated pathophysiological levels), at a high level of sensitivity and accuracy. Particular emphasis was placed on 1) sensitive and precise detection of modification sites, 2) the avoidance of loss or artefactual creation of modifications, 3) accurate quantification of peptide abundance and reduction of missing values problem, 4) monitoring the dynamics of modification in samples exposed to different oxidant concentrations and 5) development of guidelines for verification of chlorination sites assignment. A combination of an optimised sample preparation protocol, and improved data analysis approaches have allowed identification of 33 and 15 chlorination sites in laminin and fibronectin, respectively, reported in previous manuscripts [1,2]. The method was subsequently tested on murine basement membrane extract, which contains high levels of laminin in a complex mixture. Here, 10 of the major chlorination sites in laminin were recapitulated, highlighting the utility of the method in detecting damage in complex samples. An optimized mass spectrometry method is presented to detect protein chlorination. Reduction and alkylation leads to loss of chlorinated residues. Identification of modification sites in fibronectin and laminin induced by HOCl. Quantification of relative site occupancy (RSO) of chlorinated residues. Largest chloroproteomics dataset to date.
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Affiliation(s)
- Tina Nybo
- Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen N, Denmark; Department of Biochemistry and Molecular Biology and VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, University of Copenhagen, Blegdamsvej 3, 2200, Copenhagen N, Denmark
| | - Adelina Rogowska-Wrzesinska
- Department of Biochemistry and Molecular Biology and VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Campusvej 55, DK-5230, Odense M, Denmark.
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Vanichkitrungruang S, Chuang CY, Hawkins CL, Hammer A, Hoefler G, Malle E, Davies MJ. Oxidation of human plasma fibronectin by inflammatory oxidants perturbs endothelial cell function. Free Radic Biol Med 2019; 136:118-134. [PMID: 30959171 DOI: 10.1016/j.freeradbiomed.2019.04.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/18/2019] [Accepted: 04/01/2019] [Indexed: 01/08/2023]
Abstract
Dysfunction of endothelial cells of the artery wall is an early event in cardiovascular disease and atherosclerosis. The cause(s) of this dysfunction are unresolved, but accumulating evidence suggests that oxidants arising from chronic low-grade inflammation are contributory agents, with increasing data implicating myeloperoxidase (MPO, released by activated leukocytes), and the oxidants it generates (e.g. HOCl and HOSCN). As these are formed extracellularly and react rapidly with proteins, we hypothesized that MPO-mediated damage to the matrix glycoprotein fibronectin (FN) would modulate FN structure and function, and its interactions with human coronary artery endothelial cells (HCAEC). Exposure of human plasma FN to HOCl resulted in modifications to FN and its functional epitopes. A dose-dependent loss of methionine and tryptophan residues, together with increasing concentrations of methionine sulfoxide, and modification of the cell-binding fragment (CBF) and heparin-binding fragment (HBF) domains was detected with HOCl, but not HOSCN. FN modification resulted in a loss of HCAEC adhesion, impaired cell spreading and reduced cell proliferation. Exposure to HCAEC to HOCl-treated FN altered the expression of HCAEC genes associated with extracellular matrix (ECM) synthesis and adhesion. Modifications were detected on HCAEC-derived ECM pre-treated with HOCl, but not HOSCN, with a loss of antibody recognition of the CBF, HBF and extra-domain A. Co-localization of epitopes arising from MPO-generated HOCl and cell-derived FN was detected in human atherosclerotic lesions. Damage was also detected on FN extracted from lesions. These data support the hypothesis that HOCl, but not HOSCN, targets and modifies FN resulting in arterial wall endothelial cell dysfunction.
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Affiliation(s)
- Siriluck Vanichkitrungruang
- The Heart Research Institute, Newtown, NSW, Australia; Faculty of Medicine, The University of Sydney, NSW, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
| | - Christine Y Chuang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
| | - Clare L Hawkins
- The Heart Research Institute, Newtown, NSW, Australia; Faculty of Medicine, The University of Sydney, NSW, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark
| | - Astrid Hammer
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Gerald Hoefler
- Institute of Pathology, Diagnostic & Research Center for Molecular BioMedicine, Medical University of Graz, Graz, Austria
| | - Ernst Malle
- Division of Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Michael J Davies
- The Heart Research Institute, Newtown, NSW, Australia; Faculty of Medicine, The University of Sydney, NSW, Australia; Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Denmark.
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Abstract
High-density lipoprotein cholesterol (HDL-c) has long been referred to as 'good cholesterol' due to its apparent inverse relationship with future CVD risk. More recent research has questioned a causal role for HDL-c in this relationship, however, as both genetic studies and numerous large-scale randomised controlled trials have found no evidence of a cardiovascular protective effect when HDL-c levels are raised. Instead, focus has switched to the functional properties of the HDL particle. Evidence suggests that both the composition and function of HDL may be significantly altered in the context of an inflammatory milieu, transforming the particle from a vasoprotective anti-atherogenic particle to a noxious pro-atherogenic equivalent. This review will summarise evidence relating HDL to CVD risk, explore recent evidence characterising changes in the composition and function of HDL that may occur in chronic inflammatory diseases, and discuss the potential for future HDL-modifying therapeutic interventions.
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Affiliation(s)
- Scott T Chiesa
- Vascular Physiology Unit, UCL Institute of Cardiovascular Science, 1 St. Martin's Le Grand, London, EC1A 4NP, UK.
| | - Marietta Charakida
- Vascular Physiology Unit, UCL Institute of Cardiovascular Science, 1 St. Martin's Le Grand, London, EC1A 4NP, UK
- Division of Imaging Sciences and Biomedical Engineering, King's College London, London, UK
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38
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Chlorination and oxidation of the extracellular matrix protein laminin and basement membrane extracts by hypochlorous acid and myeloperoxidase. Redox Biol 2018; 20:496-513. [PMID: 30476874 PMCID: PMC6260226 DOI: 10.1016/j.redox.2018.10.022] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 10/29/2018] [Accepted: 10/30/2018] [Indexed: 12/13/2022] Open
Abstract
Basement membranes are specialized extracellular matrices that underlie arterial wall endothelial cells, with laminin being a key structural and biologically-active component. Hypochlorous acid (HOCl), a potent oxidizing and chlorinating agent, is formed in vivo at sites of inflammation via the enzymatic action of myeloperoxidase (MPO), released by activated leukocytes. Considerable data supports a role for MPO-derived oxidants in cardiovascular disease and particularly atherosclerosis. These effects may be mediated via extracellular matrix damage to which MPO binds. Herein we detect and quantify sites of oxidation and chlorination on isolated laminin-111, and laminin in basement membrane extracts (BME), by use of mass spectrometry. Increased modification was detected with increasing oxidant exposure. Mass mapping indicated selectivity in the sites and extent of damage; Met residues were most heavily modified. Fewer modifications were detected with BME, possibly due to the shielding effects. HOCl oxidised 30 (of 56 total) Met and 7 (of 24) Trp residues, and chlorinated 33 (of 99) Tyr residues; 3 Tyr were dichlorinated. An additional 8 Met and 10 Trp oxidations, 14 chlorinations, and 18 dichlorinations were detected with the MPO/H2O2/Cl- system when compared to reagent HOCl. Interestingly, chlorination was detected at Tyr2415 in the integrin-binding region; this may decrease cellular adhesion. Co-localization of MPO-damaged epitopes and laminin was detected in human atherosclerotic lesions. These data indicate that laminin is extensively modified by MPO-derived oxidants, with structural and functional changes. These modifications, and compromised cell-matrix interactions, may promote endothelial cell dysfunction, weaken the structure of atherosclerotic lesions, and enhance lesion rupture.
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Nybo T, Cai H, Chuang CY, Gamon LF, Rogowska-Wrzesinska A, Davies MJ. Chlorination and oxidation of human plasma fibronectin by myeloperoxidase-derived oxidants, and its consequences for smooth muscle cell function. Redox Biol 2018; 19:388-400. [PMID: 30237127 PMCID: PMC6142189 DOI: 10.1016/j.redox.2018.09.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/28/2018] [Accepted: 09/03/2018] [Indexed: 12/11/2022] Open
Abstract
Fibronectin (FN) occurs as both a soluble form, in plasma and at sites of tissue injury, and a cellular form in tissue extracellular matrices (ECM). FN is critical to wound repair, ECM structure and assembly, cell adhesion and proliferation. FN is reported to play a critical role in the development, progression and stability of cardiovascular atherosclerotic lesions, with high FN levels associated with a thick fibrotic cap, stable disease and a low risk of rupture. Evidence has been presented for FN modification by inflammatory oxidants, and particularly myeloperoxidase (MPO)-derived species including hypochlorous acid (HOCl). The targets and consequences of FN modification are poorly understood. Here we show, using a newly-developed MS protocol, that HOCl and an enzymatic MPO system, generate site-specific dose-dependent Tyr chlorination and dichlorination (up to 16 of 100 residues modified), and oxidation of Trp (7 of 39 residues), Met (3 of 26) and His (1 of 55) within selected FN domains, and particularly the heparin- and cell-binding regions. These alterations increase FN binding to heparin-containing columns. Studies using primary human coronary artery smooth muscle cells (HCASMC) show that exposure to HOCl-modified FN, results in decreased adherence, increased proliferation and altered expression of genes involved in ECM synthesis and remodelling. These findings indicate that the presence of modified fibronectin may play a major role in the formation, development and stabilisation of fibrous caps in atherosclerotic lesions and may play a key role in the switching of quiescent contractile smooth muscle cells to a migratory, synthetic and proliferative phenotype.
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Affiliation(s)
- Tina Nybo
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Huan Cai
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Christine Y Chuang
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Luke F Gamon
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark
| | - Adelina Rogowska-Wrzesinska
- Department of Biochemistry and Molecular Biology and VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Odense, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen, Denmark.
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Benson TW, Weintraub NL, Kim HW, Seigler N, Kumar S, Pye J, Horimatsu T, Pellenberg R, Stepp DW, Lucas R, Bogdanov VY, Litwin SE, Brittain JE, Harris RA. A single high-fat meal provokes pathological erythrocyte remodeling and increases myeloperoxidase levels: implications for acute coronary syndrome. J Transl Med 2018; 98:1300-1310. [PMID: 29572498 PMCID: PMC6342280 DOI: 10.1038/s41374-018-0038-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/19/2018] [Accepted: 01/31/2018] [Indexed: 12/20/2022] Open
Abstract
High-fat meal (HFM) consumption can produce acute lipemia and trigger myocardial infarction in patients with atherosclerosis, but the mechanisms are poorly understood. Erythrocytes (red blood cells, RBCs) intimately interact with inflammatory cells and blood vessels and play a complex role in regulating vascular function. Chronic high-fat feeding in mice induces pathological RBC remodeling, suggesting a novel link between HFM, RBCs, and vascular dysfunction. However, whether acute HFM can induce RBC remodeling in humans is unknown. Ten healthy individuals were subjected to biochemical testing and assessment of endothelial-dependent flow-mediated dilation (FMD) before and after a single HFM or iso-caloric meal (ICM). Following the HFM, triglyceride, cholesterol, and free fatty acid levels were all significantly increased, in conjunction with impaired post-prandial FMD. Additionally, peripheral blood smears demonstrated microcytes, remodeled RBCs, and fatty monocytes. Increased intracellular ROS and nitration of protein band 3 was detected in RBCs following the HFM. The HFM elevated plasma and RBC-bound myeloperoxidase (MPO), which was associated with impaired FMD and oxidation of HDL. Monocytic cells exposed to lipid in vitro released MPO, while porcine coronary arteries exposed to fatty acids ex vivo took up MPO. We demonstrate in humans that a single HFM induces pathological RBC remodeling and concurrently elevates MPO, which can potentially enter the blood vessel wall to trigger oxidative stress and destabilize vulnerable plaques. These novel findings may have implications for the short-term risk of HFM consumption and alimentary lipemia in patients with atherosclerosis.
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Affiliation(s)
- Tyler W Benson
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Neal L Weintraub
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA.
| | - Ha Won Kim
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Nichole Seigler
- Georgia Prevention Institute, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Sanjiv Kumar
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Jonathan Pye
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Tetsuo Horimatsu
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Rod Pellenberg
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - David W Stepp
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Rudolf Lucas
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
| | - Vladimir Y Bogdanov
- Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Sheldon E Litwin
- Cardiology Division, Medical University of South Carolina, Charleston, SC, USA
| | - Julia E Brittain
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA.
| | - Ryan A Harris
- Georgia Prevention Institute, Medical College of Georgia, Augusta University, Augusta, GA, 30912, USA
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Khalil A, Medfai H, Poelvoorde P, Kazan MF, Delporte C, Van Antwerpen P, El-Makhour Y, Biston P, Delrée P, Badran B, Vanhamme L, Boudjeltia KZ. Myeloperoxidase promotes tube formation, triggers ERK1/2 and Akt pathways and is expressed endogenously in endothelial cells. Arch Biochem Biophys 2018; 654:55-69. [PMID: 30016634 DOI: 10.1016/j.abb.2018.07.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 06/15/2018] [Accepted: 07/12/2018] [Indexed: 01/15/2023]
Abstract
Myeloperoxidase is a member of the mammalian peroxidase family, mainly expressed in the myeloblastic cell lineage. It is considered a major bactericidal agent as it is released in the phagosome where it catalyzes the formation of reactive oxygen species. It is also released in the extracellular spaces including blood where it is absorbed on (lipo)proteins and endothelial cell surface, interfering with endothelial function. We performed RNA sequencing on MPO-treated endothelial cells, analyzed their transcriptome and validated the profile of gene expression by individual qRT-PCR. Some of the induced genes could be grouped in several functional networks, including tubulogenesis, angiogenesis, and blood vessel morphogenesis and development as well as signal transduction pathways associated to these mechanisms. MPO treatment mimicked the effects of VEGF on several signal transduction pathways, such as Akt, ERK or FAK involved in angiogenesis. Accordingly MPO, independently of its enzymatic activity, stimulated tube formation by endothelial cells. RNA interference also pointed at a role of endogenous MPO in tubulogenesis and endothelium wound repair in vitro. These data suggest that MPO, whether from endogenous or exogenous sources, could play a role in angiogenesis and vascular repair in vivo.
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Affiliation(s)
- Alia Khalil
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium; Laboratory of Cancer Biology and Molecular Immunology, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Hayfa Medfai
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Philippe Poelvoorde
- Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium
| | - Mohammad Fayyad Kazan
- Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium
| | - Cedric Delporte
- Laboratory of Pharmaceutical Chemistry and Analytical Platform of the Faculty of Pharmacy, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry and Analytical Platform of the Faculty of Pharmacy, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Yolla El-Makhour
- Laboratory of Cancer Biology and Molecular Immunology, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Patrick Biston
- Department of Intensive Care Unit, CHU de Charleroi, Charleroi, Belgium
| | - Paul Delrée
- IPG, Avenue Georges Lemaître 25, 6041, Gosselies, Belgium
| | - Bassam Badran
- Laboratory of Cancer Biology and Molecular Immunology, Lebanese University, Faculty of Sciences, Hadath-Beirut, Lebanon
| | - Luc Vanhamme
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium; Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium.
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
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Freeman BA, O'Donnell VB, Schopfer FJ. The discovery of nitro-fatty acids as products of metabolic and inflammatory reactions and mediators of adaptive cell signaling. Nitric Oxide 2018; 77:106-111. [PMID: 29742447 DOI: 10.1016/j.niox.2018.05.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 05/04/2018] [Indexed: 01/06/2023]
Abstract
Foundational advances in eicosanoid signaling, the free radical biology of oxygen and nitric oxide and mass spectrometry all converged to enable the discovery of nitrated unsaturated fatty acids. Due to the unique biochemical characteristics of fatty acid nitroalkenes, these species undergo rapid and reversible Michael addition of biological nucleophiles such as cysteine, leading to the post-translational modification of low molecular weight and protein thiols. This capability has led to the present understanding that nitro-fatty acid reaction with the alkylation-sensitive cysteine proteome leads to physiologically-beneficial alterations in transcriptional regulatory protein function, gene expression and in vivo rodent model responses to metabolic and inflammatory stress. These findings motivated the preclinical and clinical development of nitro-fatty acids as new drug candidates for treating acute and chronic metabolic and inflammatory disorders.
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Affiliation(s)
- Bruce A Freeman
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA.
| | - Valerie B O'Donnell
- Systems Immunity Research Institute and Division of Infection and Immunity, Cardiff University, Cardiff, UK
| | - Francisco J Schopfer
- Department of Pharmacology and Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA.
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43
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Vanhamme L, Zouaoui Boudjeltia K, Van Antwerpen P, Delporte C. The other myeloperoxidase: Emerging functions. Arch Biochem Biophys 2018; 649:1-14. [PMID: 29614255 DOI: 10.1016/j.abb.2018.03.037] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/07/2018] [Accepted: 03/30/2018] [Indexed: 12/20/2022]
Abstract
Myeloperoxidase (MPO) is a member of the mammalian peroxidase family. It is mainly expressed in neutrophils, monocytes and macrophages. As a catalyzer of reactive oxidative species and radical species formation, it contributes to neutrophil bactericidal activity. Nevertheless MPO invalidation does not seem to have major health consequences in affected individuals. This suggests that MPO might have alternative functions supporting its conservation during evolution. We will review the available data supporting these non-canonical functions in terms of tissue specific expression, function and enzymatic activity. Thus, we discuss its cell type specific expression. We review in between others its roles in angiogenesis, endothelial (dys-) function, immune reaction, and inflammation. We summarize its pathological actions in clinical conditions such as cardiovascular disease and cancer.
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Affiliation(s)
- Luc Vanhamme
- Laboratory of Molecular Biology of Inflammation, IBMM, Faculty of Sciences, Université Libre de Bruxelles, Gosselies, Belgium; Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium.
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU de Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Pierre Van Antwerpen
- Pharmacognosy, Bioanalysis and Drug Discovery Unit, RD3, and Analytical Platform of the Faculty of Pharmacy, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Cédric Delporte
- Pharmacognosy, Bioanalysis and Drug Discovery Unit, RD3, and Analytical Platform of the Faculty of Pharmacy, Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium.
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Wang H, Wang Q, Venugopal J, Wang J, Kleiman K, Guo C, Eitzman DT. Obesity-induced Endothelial Dysfunction is Prevented by Neutrophil Extracellular Trap Inhibition. Sci Rep 2018; 8:4881. [PMID: 29559676 PMCID: PMC5861102 DOI: 10.1038/s41598-018-23256-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 03/08/2018] [Indexed: 12/27/2022] Open
Abstract
Endothelial dysfunction precedes atherosclerosis and may constitute a critical link between obesity-related inflammation and cardiovascular disease. Neutrophil extracellular traps (NETs) have been shown to promote vascular damage in murine models of autoimmune disease and atherosclerosis. The impact of NETs towards endothelial dysfunction associated with obesity is unknown. Using a diet-induced obesity (DIO) mouse model, this study investigated whether the inhibition or degradation of NETs could reduce the endothelial dysfunction observed in DIO mice. Following induction of DIO, there were elevated plasma concentrations of monocyte chemoattractant protein-1 (MCP-1) and impairment of mesenteric arteriolar vasorelaxation in response to acetylcholine as measured by pressure myography. A marker of NET formation, cathelicidin-related antimicrobial peptide (CRAMP), was markedly increased in mesenteric arterial walls of DIO mice compared to mice on standard chow. Prevention of NET formation with Cl-amidine or dissolution of NETs with DNase restored endothelium-dependent vasodilation to the mesenteric arteries of DIO mice. These findings suggest an instrumental role for NETs in obesity-induced endothelial dysfunction.
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Affiliation(s)
- Hui Wang
- University of Michigan, Department of Internal Medicine, Cardiovascular Research Center, Ann Arbor, Michigan, USA
| | - Qian Wang
- Department of Cardiology, the Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Jessica Venugopal
- University of Michigan, Department of Internal Medicine, Cardiovascular Research Center, Ann Arbor, Michigan, USA
| | - Jintao Wang
- University of Michigan, Department of Internal Medicine, Cardiovascular Research Center, Ann Arbor, Michigan, USA
| | - Kyle Kleiman
- University of Michigan, Department of Internal Medicine, Cardiovascular Research Center, Ann Arbor, Michigan, USA
| | - Chiao Guo
- University of Michigan, Department of Internal Medicine, Cardiovascular Research Center, Ann Arbor, Michigan, USA
| | - Daniel T Eitzman
- University of Michigan, Department of Internal Medicine, Cardiovascular Research Center, Ann Arbor, Michigan, USA.
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Zhu ML, Zhao JP, Cui N, Gonçalves-Rizzi VH, Possomato-Vieira JS, Nascimento RA, Dias-Junior CA. Cardiac myeloperoxidase activity is elevated in hypertensive pregnant rats. Curr Med Sci 2017; 37:904-909. [PMID: 29270751 DOI: 10.1007/s11596-017-1825-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/24/2017] [Indexed: 01/21/2023]
Abstract
Myeloperoxidase (MPO) is released from activated neutrophils. The inflammation in preeclampsia was found to be associated with endothelial dysfunction. We hypothesized that cardiac and circulating MPO levels are elevated in hypertensive pregnancy. Systolic and diastolic blood pressure and heart rate were measured on pregnancy days 14, 16, 18 and 20 in normal pregnant and hypertensive pregnant rats. Left and right ventricle weights, the number of viable fetuses, litter size, fetal and placenta weights were recorded on gestational day 21. Circulating and cardiac MPO activities, soluble fms-like tyrosine kinase-1 (sFlt-1) and vascular endothelial growth factor (VEGF) and nitric oxide (NO) were detected. The results showed increases in cardiac (left, but not right ventricle) and circulating MPO activities, and concomitantly lower number of viable fetuses, litter size, and fetal and placenta weights, and decreases in NO in hypertensive pregnant rats. Also, the increases in circulating sFlt-1 and VEGF were found in hypertensive pregnant group. In conclusion, maternal and fetal detrimental changes along with increases in circulating sFlt-1 and VEGF in hypertensive pregnancy may be associated with increases in cardiac and circulating MPO activities, confirming the causative role of inflammatory response in preeclampsia.
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Affiliation(s)
- Ming-Lin Zhu
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital, Wuhan University, Wuhan, 430071, China
| | - Jin-Ping Zhao
- Department of Thoracic and Cardiovascular Surgery, Zhongnan Hospital, Wuhan University, Wuhan, 430071, China.
| | - Ning Cui
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Victor H Gonçalves-Rizzi
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University (UNESP), Botucatu, 18618681, Brazil
| | - Jose S Possomato-Vieira
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University (UNESP), Botucatu, 18618681, Brazil
| | - Regina A Nascimento
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University (UNESP), Botucatu, 18618681, Brazil
| | - Carlos A Dias-Junior
- Department of Pharmacology, Biosciences Institute of Botucatu, Sao Paulo State University (UNESP), Botucatu, 18618681, Brazil.
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Colon S, Page-McCaw P, Bhave G. Role of Hypohalous Acids in Basement Membrane Homeostasis. Antioxid Redox Signal 2017; 27:839-854. [PMID: 28657332 PMCID: PMC5647493 DOI: 10.1089/ars.2017.7245] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 06/26/2017] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE Basement membranes (BMs) are sheet-like structures of specialized extracellular matrix that underlie nearly all tissue cell layers including epithelial, endothelial, and muscle cells. BMs not only provide structural support but are also critical for the development, maintenance, and repair of organs. Animal heme peroxidases generate highly reactive hypohalous acids extracellularly and, therefore, target BMs for oxidative modification. Given the importance of BMs in tissue structure and function, hypohalous acid-mediated oxidative modifications of BM proteins represent a key mechanism in normal development and pathogenesis of disease. Recent Advances: Peroxidasin (PXDN), a BM-associated animal heme peroxidase, generates hypobromous acid (HOBr) to form sulfilimine cross-links within the collagen IV network of BM. These cross-links stabilize BM and are critical for animal tissue development. These findings highlight a paradoxical anabolic role for HOBr, which typically damages protein structure leading to dysfunction. CRITICAL ISSUES The molecular mechanism whereby PXDN uses HOBr as a reactive intermediate to cross-link collagen IV, yet avoid collateral damage to nearby BM proteins, remains unclear. FUTURE DIRECTIONS The exact identification and functional impact of specific hypohalous acid-mediated modifications of BM proteins need to be addressed to connect these modifications to tissue development and pathogenesis of disease. As seen with the sulfilimine cross-link of collagen IV, hypohalous acid oxidative events may be beneficial in select situations rather than uniformly deleterious. Antioxid. Redox Signal. 27, 839-854.
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Affiliation(s)
- Selene Colon
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Biological Sciences, Tennessee State University, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Patrick Page-McCaw
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Gautam Bhave
- Division of Nephrology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee
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Strzepa A, Pritchard KA, Dittel BN. Myeloperoxidase: A new player in autoimmunity. Cell Immunol 2017; 317:1-8. [PMID: 28511921 PMCID: PMC5665680 DOI: 10.1016/j.cellimm.2017.05.002] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 05/05/2017] [Accepted: 05/08/2017] [Indexed: 12/22/2022]
Abstract
Myeloperoxidase (MPO) is the most toxic enzyme found in the azurophilic granules of neutrophils. MPO utilizes H2O2 to generate hypochlorous acid (HClO) and other reactive moieties, which kill pathogens during infections. In contrast, in the setting of sterile inflammation, MPO and MPO-derived oxidants are thought to be pathogenic, promoting inflammation and causing tissue damage. In contrast, evidence also exists that MPO can limit the extent of immune responses. Elevated MPO levels and activity are observed in a number of autoimmune diseases including in the central nervous system (CNS) of multiple sclerosis (MS) and the joints of rheumatoid arthritis (RA) patients. A pathogenic role for MPO in driving autoimmune inflammation was demonstrated using mouse models. Mechanisms whereby MPO is thought to contribute to disease pathogenesis include tuning of adaptive immune responses and/or the induction of vascular permeability.
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Affiliation(s)
- Anna Strzepa
- Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI, United States; Department of Medical Biology, Faculty of Health Sciences, Jagiellonian University Medical College, ul. Kopernika 7, 31-034 Krakow, Poland
| | - Kirkwood A Pritchard
- Department of Surgery, Division of Pediatric Surgery, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Bonnie N Dittel
- Blood Research Institute, BloodCenter of Wisconsin, Milwaukee, WI, United States; Department of Microbiology and Immunology, School of Pharmacy, Medical College of Wisconsin, Milwaukee, WI, United States.
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Engin AB, Nikitovic D, Neagu M, Henrich-Noack P, Docea AO, Shtilman MI, Golokhvast K, Tsatsakis AM. Mechanistic understanding of nanoparticles' interactions with extracellular matrix: the cell and immune system. Part Fibre Toxicol 2017; 14:22. [PMID: 28646905 PMCID: PMC5483305 DOI: 10.1186/s12989-017-0199-z] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 06/08/2017] [Indexed: 12/12/2022] Open
Abstract
Extracellular matrix (ECM) is an extraordinarily complex and unique meshwork composed of structural proteins and glycosaminoglycans. The ECM provides essential physical scaffolding for the cellular constituents, as well as contributes to crucial biochemical signaling. Importantly, ECM is an indispensable part of all biological barriers and substantially modulates the interchange of the nanotechnology products through these barriers. The interactions of the ECM with nanoparticles (NPs) depend on the morphological characteristics of intercellular matrix and on the physical characteristics of the NPs and may be either deleterious or beneficial. Importantly, an altered expression of ECM molecules ultimately affects all biological processes including inflammation. This review critically discusses the specific behavior of NPs that are within the ECM domain, and passing through the biological barriers. Furthermore, regenerative and toxicological aspects of nanomaterials are debated in terms of the immune cells-NPs interactions.
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Affiliation(s)
- Ayse Basak Engin
- Department of Toxicology, Faculty of Pharmacy, Gazi University, Hipodrom, 06330 Ankara, Turkey
| | - Dragana Nikitovic
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, Heraklion, Greece
| | - Monica Neagu
- “Victor Babes” National Institute of Pathology, Immunology Department, 99-101 Splaiul Independentei, 050096 Bucharest, Romania
| | - Petra Henrich-Noack
- Institute of Medical Psychology, Otto-von-Guericke University, 39120 Magdeburg, Germany
| | - Anca Oana Docea
- Department of Toxicology, University of Medicine and Pharmacy, Faculty of Pharmacy, Petru Rares, 200349 Craiova, Romania
| | - Mikhail I. Shtilman
- Master School Biomaterials, D.I. Mendeleyev University of Chemical Technology, Moscow, Russia
| | - Kirill Golokhvast
- Scientific Educational Center Nanotechnology, Engineering School, Far Eastern Federal University, Vladivostok, Russian Federation
| | - Aristidis M. Tsatsakis
- Scientific Educational Center Nanotechnology, Engineering School, Far Eastern Federal University, Vladivostok, Russian Federation
- Center of Toxicology Science & Research, Medical School, University of Crete, Heraklion, Crete Greece
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Meng FY, Gao W, Ju YN. Parecoxib reduced ventilation induced lung injury in acute respiratory distress syndrome. BMC Pharmacol Toxicol 2017; 18:25. [PMID: 28356130 PMCID: PMC5372249 DOI: 10.1186/s40360-017-0131-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 03/24/2017] [Indexed: 11/25/2022] Open
Abstract
Background Cyclooxygenase-2 (COX-2) contributes to ventilation induced lung injury (VILI) and acute respiratory distress syndrome (ARDS). The objective of present study was to observe the therapeutic effect of parecoxib on VILI in ARDS. Methods In this parallel controlled study performed at Harbin Medical University, China between January 2016 and March 2016, 24 rats were randomly allocated into sham group (S), volume ventilation group/ARDS (VA), parecoxib/volume ventilation group/ARDS (PVA). Rats in the S group only received anesthesia; rats in the VA and PVA group received intravenous injection of endotoxin to induce ARDS, and then received ventilation. Rats in the VA and PVA groups were treated with intravenous injection of saline or parecoxib. The ratio of arterial oxygen pressure to fractional inspired oxygen (PaO2/FiO2), the wet to dry weight ratio of lung tissue, inflammatory factors in serum and bronchoalveolar lavage fluid (BALF), and histopathologic analyses of lung tissue were examined. In addition, survival was calculated at 24 h after VILI. Results Compared to the VA group, in the PVA group, PaO2/FiO2 was significantly increased; lung tissue wet to dry weight ratio; macrophage and neutrophil counts, total protein and neutrophil elastase levels in BALF; tumor necrosis factor-α, interleukin-1β, and prostaglandin E2 levels in BALF and serum; and myeloperoxidase (MPO) activity, malondialdehyde levels, and Bax and COX-2 protein levels in lung tissue were significantly decreased, while Bcl-2 protein levels were significantly increased. Lung histopathogical changes and apoptosis were reduced by parecpxib in the PVA group. Survival was increased in the PVA group. Conclusions Parecoxib improves gas exchange and epithelial permeability, decreases edema, reduces local and systemic inflammation, ameliorates lung injury and apoptosis, and increases survival in a rat model of VILI.
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Affiliation(s)
- Fan-You Meng
- Department of Anesthesiology, the Second Affiliated Hospital of the Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Wei Gao
- Department of Anesthesiology, the Second Affiliated Hospital of the Harbin Medical University, Harbin, 150081, Heilongjiang Province, China
| | - Ying-Nan Ju
- Department of Intensive Care Unit, the Third Affiliated Hospital of the Harbin Medical University, Harbin, 150081, Heilongjiang Province, China.
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50
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Maiocchi SL, Morris JC, Rees MD, Thomas SR. Regulation of the nitric oxide oxidase activity of myeloperoxidase by pharmacological agents. Biochem Pharmacol 2017; 135:90-115. [PMID: 28344126 DOI: 10.1016/j.bcp.2017.03.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/22/2017] [Indexed: 01/10/2023]
Abstract
The leukocyte-derived heme enzyme myeloperoxidase (MPO) is released extracellularly during inflammation and impairs nitric oxide (NO) bioavailability by directly oxidizing NO or producing NO-consuming substrate radicals. Here, structurally diverse pharmacological agents with activities as MPO substrates/inhibitors or antioxidants were screened for their effects on MPO NO oxidase activity in human plasma and physiological model systems containing endogenous MPO substrates/antioxidants (tyrosine, urate, ascorbate). Hydrazide-based irreversible/reversible MPO inhibitors (4-ABAH, isoniazid) or the sickle cell anaemia drug, hydroxyurea, all promoted MPO NO oxidase activity. This involved the capacity of NO to antagonize MPO inhibition by hydrazide-derived radicals and/or the ability of drug-derived radicals to stimulate MPO turnover thereby increasing NO consumption by MPO redox intermediates or NO-consuming radicals. In contrast, the mechanism-based irreversible MPO inhibitor 2-thioxanthine, potently inhibited MPO turnover and NO consumption. Although the phenolics acetaminophen and resveratrol initially increased MPO turnover and NO consumption, they limited the overall extent of NO loss by rapidly depleting H2O2 and promoting the formation of ascorbyl radicals, which inefficiently consume NO. The vitamin E analogue trolox inhibited MPO NO oxidase activity in ascorbate-depleted fluids by scavenging NO-consuming tyrosyl and urate radicals. Tempol and related nitroxides decreased NO consumption in ascorbate-replete fluids by scavenging MPO-derived ascorbyl radicals. Indoles or apocynin yielded marginal effects. Kinetic analyses rationalized differences in drug activities and identified criteria for the improved inhibition of MPO NO oxidase activity. This study reveals that widely used agents have important implications for MPO NO oxidase activity under physiological conditions, highlighting new pharmacological strategies for preserving NO bioavailability during inflammation.
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Affiliation(s)
- Sophie L Maiocchi
- Mechanisms of Disease & Translational Research, Department of Pathology, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW 2052, Australia; School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Jonathan C Morris
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Martin D Rees
- Mechanisms of Disease & Translational Research, Department of Pathology, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Shane R Thomas
- Mechanisms of Disease & Translational Research, Department of Pathology, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
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