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Jeradeh E, Frangie C, Bazzi S, Daher J. The in vitro effect of myeloperoxidase oxidized LDL on THP-1 derived macrophages. Innate Immun 2024; 30:82-89. [PMID: 39090856 PMCID: PMC11418607 DOI: 10.1177/17534259241269687] [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: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/04/2024] Open
Abstract
Cardiovascular diseases (CVDs) linked to atherosclerosis remains the leading cause of death worldwide. Atherosclerosis is primarily caused by the accumulation of oxidized forms of low density lipoprotein (LDL) in macrophages (MΦs) in the subendothelial layer of arteries leading to foam cell and fatty streak formation. Many studies suggest that LDL that is modified by myeloperoxidase (MPO) is a key player in the development of atherosclerosis. MΦs can adopt a variety of functional phenotypes that include mainly the proinflammatory M1 and the anti-inflammatory M2 MΦ phenotypes which are both implicated in the process of atherogenesis. In fact, MΦs that reside in atherosclerostic lesions were shown to express a variety of phenotypes ranging between the M1- and M2 MΦ types. Recently, we pointed out the involvement of MPO oxidized-LDL (Mox-LDL) in increasing inflammation in MΦs by reducing their secretion of IL-10. Since little is known about Mox-LDL-mediated pro-atherosclerostic responses in MΦs, our study aimed at analyzing the in vitro effects of Mox-LDL at this level through making use of the well-established model of human THP-1-derived Mφs. Our results demonstrate that Mox-LDL has no effect on apoptosis, reactive oxygen species (ROS) generation and cell death in our cell model; yet, interestingly, our results show that Mox-LDL is significantly engulfed at a higher rate in the different MΦ subtypes supporting its key role in foam cell formation during the progression of the disease as well as previous data that were generated using another primary MΦ cell model of atherosclerosis.
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Affiliation(s)
- Elias Jeradeh
- Department of Biology, Faculty of Arts and Sciences, University of Balamand, El-Koura, Lebanon
| | - Christian Frangie
- Department of Molecular Biology, Institute of Biology and Molecular Medicine, IBMM, Université Libre de Bruxelles, Gosselies Campus, Gosselies, Belgium
| | - Samer Bazzi
- Department of Biomedical Sciences, Faculty of Medicine and Medical Science, University of Balamand, El-Koura, Lebanon
| | - Jalil Daher
- Department of Biology, Faculty of Arts and Sciences, University of Balamand, El-Koura, Lebanon
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2
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Frangie C, Daher J. Role of myeloperoxidase in inflammation and atherosclerosis (Review). Biomed Rep 2022; 16:53. [PMID: 35620311 PMCID: PMC9112398 DOI: 10.3892/br.2022.1536] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 04/12/2022] [Indexed: 11/29/2022] Open
Abstract
Myeloperoxidase (MPO) belongs to the heme peroxidase family, which includes a set of enzymes with potent oxidoreductase activity. MPO is considered an important part of the innate immune system's microbicidal arm and is secreted by neutrophils and macrophages. Interestingly, this enzyme has been implicated in the pathogenesis of several diseases including atherosclerosis. MPO is ubiquitous in atherosclerotic lesions and contributes to the initiation and progression of the disease primarily by oxidizing low-density lipoprotein (LDL) particles. MPO is the only human enzyme with the ability to produce hypochlorous acid (HOCl) at physiological chloride concentrations and HOCl-LDL epitopes were shown to be present inside atheromatous lesions making it a physiologically relevant model for the oxidation of LDL. It has been shown that MPO modified LDL is not able to bind to the native LDL receptor and is recognized instead by scavenger receptors on both endothelial cells and macrophages, which can lead to endothelial dysfunction and foam cell formation, respectively; both of which are instrumental in the progression of the disease. Meanwhile, several studies have proposed MPO as a biomarker for cardiovascular diseases where high levels of this enzyme were linked to an increased risk of developing coronary artery disease. Overall, there is sufficient evidence supporting the value of MPO as a crucial player in health and disease. Thus, future research should be directed towards investigating the still unknown processes associated with this enzyme. This may assist in better understanding the pathophysiological role of MPO, as well in the development of therapeutic strategies for protecting against the deleterious effects of MPO in numerous pathologies such as atherosclerosis.
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Affiliation(s)
- Christian Frangie
- Department of Biology, Faculty of Arts and Sciences, University of Balamand, El‑Koura 100, Lebanon
| | - Jalil Daher
- Department of Biology, Faculty of Arts and Sciences, University of Balamand, El‑Koura 100, Lebanon
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3
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Tangeten C, Zouaoui Boudjeltia K, Delporte C, Van Antwerpen P, Korpak K. Unexpected Role of MPO-Oxidized LDLs in Atherosclerosis: In between Inflammation and Its Resolution. Antioxidants (Basel) 2022; 11:antiox11050874. [PMID: 35624738 PMCID: PMC9137493 DOI: 10.3390/antiox11050874] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 01/02/2023] Open
Abstract
Inflammation and its resolution are the result of the balance between pro-inflammatory and pro-resolving factors, such as specialized pro-resolving mediators (SPMs). This balance is crucial for plaque evolution in atherosclerosis, a chronic inflammatory disease. Myeloperoxidase (MPO) has been related to oxidative stress and atherosclerosis, and MPO-oxidized low-density lipoproteins (Mox-LDLs) have specific characteristics and effects. They participate in foam cell formation and cause specific reactions when interacting with macrophages and endothelial cells. They also increase the production of intracellular reactive oxygen species (ROS) in macrophages and the resulting antioxidant response. Mox-LDLs also drive macrophage polarization. Mox-LDLs are known to be pro-inflammatory particles. However, in the presence of Mox-LDLs, endothelial cells produce resolvin D1 (RvD1), a SPM. SPMs are involved in the resolution of inflammation by stimulating efferocytosis and by reducing the adhesion and recruitment of neutrophils and monocytes. RvD1 also induces the synthesis of other SPMs. In vitro, Mox-LDLs have a dual effect by promoting RvD1 release and inducing a more anti-inflammatory phenotype macrophage, thereby having a mixed effect on inflammation. In this review, we discuss the interrelationship between MPO, Mox-LDLs, and resolvins, highlighting a new perception of the role of Mox-LDLs in atherosclerosis.
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Affiliation(s)
- Cecilia Tangeten
- RD3-Pharmacognosy, Bioanalysis and Drug Discovery, Faculty of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
- Correspondence: ; Tel.: +32-2-650-5331
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine, ULB 222 Unit, CHU-Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, 6110 Montigny-le-Tilleul, Belgium; (K.Z.B.); (K.K.)
| | - Cedric Delporte
- RD3-Pharmacognosy, Bioanalysis and Drug Discovery, Faculty of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
| | - Pierre Van Antwerpen
- RD3-Pharmacognosy, Bioanalysis and Drug Discovery, Faculty of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
| | - Keziah Korpak
- Laboratory of Experimental Medicine, ULB 222 Unit, CHU-Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, 6110 Montigny-le-Tilleul, Belgium; (K.Z.B.); (K.K.)
- Department of Geriatric Medicine, CHU-Charleroi, Université Libre de Bruxelles, 6042 Charleroi, Belgium
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4
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Noh S, Mai K, Shaver M, Yong S, Mostaghimi M, Oh G, Radwan MM. Emerging Cholesterol Modulators for Atherosclerotic Cardiovascular Disease. Am J Med Sci 2022; 363:373-387. [DOI: 10.1016/j.amjms.2021.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 08/07/2021] [Accepted: 12/07/2021] [Indexed: 12/01/2022]
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5
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Coremans C, Delporte C, Cotton F, Van De Borne P, Boudjeltia KZ, Van Antwerpen P. Mass Spectrometry for the Monitoring of Lipoprotein Oxidations by Myeloperoxidase in Cardiovascular Diseases. Molecules 2021; 26:molecules26175264. [PMID: 34500696 PMCID: PMC8434463 DOI: 10.3390/molecules26175264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/05/2021] [Accepted: 08/10/2021] [Indexed: 01/14/2023] Open
Abstract
Oxidative modifications of HDLs and LDLs by myeloperoxidase (MPO) are regularly mentioned in the context of atherosclerosis. The enzyme adsorbs on protein moieties and locally produces oxidizing agents to modify specific residues on apolipoproteins A-1 and B-100. Oxidation of lipoproteins by MPO (Mox) leads to dysfunctional Mox-HDLs associated with cholesterol-efflux deficiency, and Mox-LDLs that are no more recognized by the LDL receptor and become proinflammatory. Several modification sites on apoA-1 and B-100 that are specific to MPO activity are described in the literature, which seem relevant in patients with cardiovascular risk. The most appropriate analytical method to assess these modifications is based on liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS). It enables the oxidized forms of apoA-1and apoB-100 to be quantified in serum, in parallel to a quantification of these apolipoproteins. Current standard methods to quantify apolipoproteins are based on immunoassays that are well standardized with good analytical performances despite the cost and the heterogeneity of the commercialized kits. Mass spectrometry can provide simultaneous measurements of quantity and quality of apolipoproteins, while being antibody-independent and directly detecting peptides carrying modifications for Mox-HDLs and Mox-LDLs. Therefore, mass spectrometry is a potential and reliable alternative for apolipoprotein quantitation.
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Affiliation(s)
- Catherine Coremans
- RD3-Pharmacognosy, Bioanalysis and Drug Discovery, Faculty of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
- Correspondence: ; Tel.: +32-2-650-5331
| | - Cédric Delporte
- RD3-Pharmacognosy, Bioanalysis and Drug Discovery, Faculty of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
| | - Frédéric Cotton
- Laboratoire Hospitalier Universitaire de Bruxelles (LHUB-ULB), Department of Clinical Chemistry, Université Libre de Bruxelles (ULB), 1000 Brussels, Belgium;
| | - Phillipe Van De Borne
- Department of Cardiology Erasme Hospital, Université Libre de Bruxelles, 1070 Brussels, Belgium;
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU-Charleroi, ISPPC Hôpital Vésale, Université Libre de Bruxelles, 6110 Montigny-Le-Tilleul, Belgium;
| | - Pierre Van Antwerpen
- RD3-Pharmacognosy, Bioanalysis and Drug Discovery, Faculty of Pharmacy, Université Libre de Bruxelles, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
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6
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Tian Z, Liang G, Cui K, Liang Y, Wang Q, Lv S, Cheng X, Zhang L. Insight Into the Prospects for RNAi Therapy of Cancer. Front Pharmacol 2021; 12:644718. [PMID: 33796026 PMCID: PMC8007863 DOI: 10.3389/fphar.2021.644718] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 02/03/2021] [Indexed: 12/11/2022] Open
Abstract
RNA interference (RNAi), also known as gene silencing, is a biological process that prevents gene expression in certain diseases such as cancer. It can be used to improve the accuracy, efficiency, and stability of treatments, particularly genetic therapies. However, challenges such as delivery of oligonucleotide drug to less accessible parts of the body and the high incidence of toxic side effects are encountered. It is therefore imperative to improve their delivery to target sites and reduce their harmful effects on noncancerous cells to harness their full potential. In this study, the role of RNAi in the treatment of COVID-19, the novel coronavirus disease plaguing many countries, has been discussed. This review aims to ascertain the mechanism and application of RNAi and explore the current challenges of RNAi therapy by identifying some of the cancer delivery systems and providing drug information for their improvement. It is worth mentioning that delivery systems such as lipid-based delivery systems and exosomes have revolutionized RNAi therapy by reducing their immunogenicity and improving their cellular affinity. A deeper understanding of the mechanism and challenges associated with RNAi in cancer therapy can provide new insights into RNAi drug development.
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Affiliation(s)
- Zhili Tian
- Institute of Molecular Medicine, Henan University, Kaifeng, China.,School of Clinical Medical Sciences, Henan University, Kaifeng, China
| | - Guohui Liang
- Institute of Molecular Medicine, Henan University, Kaifeng, China.,School of Clinical Medical Sciences, Henan University, Kaifeng, China
| | - Kunli Cui
- School of Basic Medical Sciences, Henan University, Kaifeng, China
| | - Yayu Liang
- Institute of Molecular Medicine, Henan University, Kaifeng, China.,School of Stomatology, Henan University, Kaifeng, China
| | - Qun Wang
- School of Basic Medical Sciences, Henan University, Kaifeng, China
| | - Shuangyu Lv
- Institute of Molecular Medicine, Henan University, Kaifeng, China
| | - Xiaoxia Cheng
- School of Basic Medical Sciences, Henan University, Kaifeng, China
| | - Lei Zhang
- School of Basic Medical Sciences, Henan University, Kaifeng, China
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Pireaux V, Delporte C, Rousseau A, Desmet JM, Van Antwerpen P, Raes M, Zouaoui Boudjeltia K. M2 Monocyte Polarization in Dialyzed Patients Is Associated with Increased Levels of M-CSF and Myeloperoxidase-Associated Oxidative Stress: Preliminary Results. Biomedicines 2021; 9:biomedicines9010084. [PMID: 33467199 PMCID: PMC7830480 DOI: 10.3390/biomedicines9010084] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/22/2022] Open
Abstract
Cardiovascular diseases represent a major issue in terms of morbidity and mortality for dialysis patients. This morbidity is due to the accelerated atherosclerosis observed in these patients. Atherosclerosis is a chronic inflammatory disease characterized by key players such as monocytes, macrophages, or oxidized LDLs. Monocytes-macrophages are classified into subsets of polarized cells, with M1 and M2 macrophages considered, respectively, as pro- and anti-inflammatory. (1) Methods: The monocyte subsets and phenotypes were analyzed by flow cytometry. These data were completed by the quantification of plasma M-CSF, IL-8, CRP, Mox-LDLs, Apo-B, Apo-AI, chloro-tyrosine, and homocitrulline concentrations. The statistical differences and associations between two continuous variables were assessed using the Mann-Whitney U test and Spearman's correlation coefficient, respectively. (2) Results: Hemodialyzed patients showed a significant increase in their concentrations of CRP, M-CSF, and IL-8 (inflammation biomarkers), as well as chloro-tyrosine and homocitrulline (myeloperoxidase-associated oxidative stress biomarkers). Moreover, we observed a higher percentage of M2 monocytes in the plasma of hemodialysis patients as compared to the controls. (3) Conclusions: Our data suggest that oxidative stress and an inflammatory environment, which is amplified in hemodialysis patients, seems to favor an increase in the concentration of circulating M-CSF, therefore leading to an increase in M2 polarization among circulating monocytes.
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Affiliation(s)
- Valérie Pireaux
- URBC-Narilis, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium; (V.P.); (M.R.)
| | - Cédric Delporte
- Laboratory of Pharmaceutical Chemistry and Analytical Platform, Faculty of Pharmacy, Université libre de Bruxelles (Campus de la Plaine) CP205/05, Boulevard du Triomphe, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
| | - Alexandre Rousseau
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU-Charleroi, ISPPC Hôpital Vésale, Université libre de Bruxelles, 6110 Montigny-Le-Tilleul, Belgium;
| | - Jean-Marc Desmet
- Nephrology-Hemodialysis Unit, CHU-Charleroi, ISPPC Hôpital Vésale, 6110 Montigny-Le-Tilleul, Belgium;
| | - Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry and Analytical Platform, Faculty of Pharmacy, Université libre de Bruxelles (Campus de la Plaine) CP205/05, Boulevard du Triomphe, 1050 Brussels, Belgium; (C.D.); (P.V.A.)
| | - Martine Raes
- URBC-Narilis, University of Namur, 61 rue de Bruxelles, 5000 Namur, Belgium; (V.P.); (M.R.)
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine (ULB 222 Unit), CHU-Charleroi, ISPPC Hôpital Vésale, Université libre de Bruxelles, 6110 Montigny-Le-Tilleul, Belgium;
- Correspondence: ; Tel.: +32-71-92-47-05; Fax: +32-71-92-47-10
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Yang R, Liu C, Li Q, Wang W, Wu B, Chen A, Wang B, Li W, Chen J. Artificial intelligence based identification of the functional role of hirudin in diabetic erectile dysfunction treatment. Pharmacol Res 2021; 163:105244. [PMID: 33053440 DOI: 10.1016/j.phrs.2020.105244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/28/2020] [Accepted: 10/06/2020] [Indexed: 12/15/2022]
Abstract
Diabetic erectile dysfunction (DED) hugely affected the patients' sexual life quality. However, there are no satisfactory therapeutic methods and intervention targets for this subtype of erectile dysfunction (ED). Inspired by the clinical practice of traditional Chinese medicine (TCM), we found that hirudin, the main active ingredient in the leech, could ameliorate the ED symptoms of the DED mouse model. To further reveal the underlying mechanism of hirudin, we designed a novel strategy to discover potential targets based on the diagnostic system of TCM, and found that myeloperoxidase (MPO) was a promising target of hirudin. Hirudin directly interacts with MPO and inhibits its activity, thus further decreases the content of oxidized low-density lipoprotein (ox-LDL) in serum. Our results demonstrated that the hirudin could ameliorate the symptoms of DED, and revealed the underlying mechanism of hirudin in regulating the activity of MPO.
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Affiliation(s)
- Ruocong Yang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 100029, China
| | - Chao Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Qianqian Li
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 100029, China
| | - Weilu Wang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 100029, China
| | - Bingbing Wu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Aiping Chen
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 100029, China
| | - Bin Wang
- Department of Andrology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Wei Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Jianxin Chen
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, 100029, China.
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9
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Amirfakhryan H. Vaccination against atherosclerosis: An overview. Hellenic J Cardiol 2020; 61:78-91. [DOI: 10.1016/j.hjc.2019.07.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/16/2019] [Accepted: 07/18/2019] [Indexed: 02/07/2023] Open
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10
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Roumeguère T, Van Antwerpen P, Vanhamme L, Delporte C, Rousseau A, Wespes E, Vanhaeverbeek M, Boudjeltia KZ. Myeloperoxidase and Prostate volume: A preliminary study. Prog Urol 2018; 28:482-487. [PMID: 30042072 DOI: 10.1016/j.purol.2018.06.004] [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: 01/01/2018] [Revised: 05/13/2018] [Accepted: 06/07/2018] [Indexed: 11/17/2022]
Abstract
OBJECTIVES Oxidative stress is associated with the development of BPH and might be modulated by several factors. Myeloperoxidase (MPO) has recently been observed in prostate tissue. Our goal was to investigate the correlation between MPO and the prostate volume. MATERIAL AND METHODS Hundred and twenty-one patients (48-70 years) with a filled IPSS were prospectively included. Blood sampling (PSA, testosterone, Angiotensin II (AngII), MPO, Mox-LDL) and transrectal ultrasound of the prostate were performed with total volume (TV) and transitional zone volume (TZ) measurements. For correlation, univariate analyses were depicted by Pearson's coefficient. Multilinear regression analysis used a stepwise backward selection of the explicative variables. RESULTS In multivariate analysis, the TV was positively correlated to the combination of age and Ang II but negatively to MPO specific activity (Std Coef=-0.272, P=0.004). Significant correlations were confirmed between TZ, age and MPO specific activity but not with Ang II. A negative correlation between TZ and MPO specific activity was also observed (Std Coef=-0.21, P=0.016). No correlation was found with Mox-LDL. CONCLUSIONS Negative correlation between MPO and prostate volume was observed but careful interpretations may be endorsed and longitudinal study is necessary. It seems relevant to focus on the potential contribution of MPO in the development of prostatic diseases as this enzyme can also promote DNA oxidation. LEVEL OF EVIDENCE 4.
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Affiliation(s)
- T Roumeguère
- Laboratory of Experimental Medicine, Unit 222, ULB, CHU Charleroi, Charleroi, Belgium; Department of Urology, University Clinics of Brussels, ULB, Erasme Hospital, Brussels, Belgium.
| | - P Van Antwerpen
- Laboratory of Pharmaceutical Chemistry and Analytical Platform of the Faculty of Pharmacy, ULB, Brussels, Belgium
| | - L Vanhamme
- Institute for Molecular Biology and Medicine (IBMM), ULB, Gosselies, Belgium
| | - C Delporte
- Laboratory of Pharmaceutical Chemistry and Analytical Platform of the Faculty of Pharmacy, ULB, Brussels, Belgium
| | - A Rousseau
- Laboratory of Experimental Medicine, Unit 222, ULB, CHU Charleroi, Charleroi, Belgium
| | - E Wespes
- Department of Urology, ULB, CHU Charleroi, Charleroi, Belgium
| | - M Vanhaeverbeek
- Laboratory of Experimental Medicine, Unit 222, ULB, CHU Charleroi, Charleroi, Belgium
| | - K Zouaoui Boudjeltia
- Laboratory of Experimental Medicine, Unit 222, ULB, CHU Charleroi, Charleroi, Belgium
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11
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Dapsone protects brain microvascular integrity from high-fat diet induced LDL oxidation. Cell Death Dis 2018; 9:683. [PMID: 29880899 PMCID: PMC5992187 DOI: 10.1038/s41419-018-0739-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/03/2018] [Accepted: 05/08/2018] [Indexed: 12/18/2022]
Abstract
Atherosclerosis was considered to induce many vascular-related complications, such as acute myocardial infarction and stroke. Abnormal lipid metabolism and its peroxidation inducing blood–brain barrier (BBB) leakage were associated with the pre-clinical stage of stroke. Dapsone (DDS), an anti-inflammation and anti-oxidation drug, has been found to have protective effects on vascular. However, whether DDS has a protective role on brain microvessels during lipid oxidation had yet to be elucidated. We investigated brain microvascular integrity in a high-fat diet (HFD) mouse model. We designed this study to explore whether DDS had protective effects on brain microvessels under lipid oxidation and tried to explain the underlying mechanism. In our live optical study, we found that DDS significantly attenuated brain microvascular leakage through reducing serum oxidized low-density lipoprotein (oxLDL) in HFD mice (p < 0.001), and DDS significantly inhibited LDL oxidation in vitro (p < 0.001). Our study showed that DDS protected tight junction proteins: ZO-1 (p < 0.001), occludin (p < 0.01), claudin-5 (p < 0.05) of microvascular endothelial cells in vivo and in vitro. DDS reversed LAMP1 aggregation in cytoplasm, and decreased the destruction of tight junction protein: ZO-1 in vitro. We first revealed that DDS had a protective role on cerebral microvessels through preventing tight junction ZO-1 from abnormal degradation by autophagy and reducing lysosome accumulation. Our findings suggested the significance of DDS in protecting brain microvessels under lipid metabolic disorders, which revealed a novel potential therapeutic strategy in brain microvascular-related diseases.
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12
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Roumeguère T, Van Antwerpen P, Fathi H, Rousseau A, Vanhamme L, Franck T, Costa C, Morelli A, Lelubre C, Hauzeur C, Raes M, Serteyn D, Wespes E, Vanhaeverbeek M, Zouaoui Boudjeltia K. Relationship between oxidative stress and erectile function. Free Radic Res 2017; 51:924-931. [PMID: 29041845 DOI: 10.1080/10715762.2017.1393074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The aim of this study was to investigate markers of inflammation and oxidative stress in the corpus cavernosum (CC) and to compare levels of inflammatory markers recorded in CC to venous blood from the arm to examine the potential impact of inflammatory parameters on erectile function and endothelial dysfunction in vitro. Ninety-seven patients with no complaint of erectile dysfunction (ED) at inclusion were prospectively included and completed the Erectile Function domain of the IIEF questionnaire. Several parameters, including lipids, MPO-dependent oxidised LDL (Mox-LDL), IL-8, IL-18, were measured. After RNA extraction, the expression of eNOS was analysed. A paired t-test was used for comparisons between arm and CC blood results. A two-way ANOVA was used to estimate the effects of IL-18 and IL-8 on the IIEF score. Mean patient age was 59 ± 14.5 years. IL-18, Mox-LDL, and Mox-LDL/ApoB levels were significantly increased in CC compared to arm blood. The IIEF score was correlated with IL-18 levels in the venous blood (R = -0.31, p = .003) and in the CC (R = -0.37, p = .004) and with IL-8 (R = -0.31, p = .009 and R = -0.28, respectively, p = .02). There was a significant effect with the IL-18 on IIEF potentiated by high serum IL-8 concentrations. IL-18 and Mox-LDL significantly decreased eNOS mRNA expression in human aortic endothelial cell line (HAEC). These preliminary results address the importance of inflammation in the CC and highlight a difference in marker concentrations between venous and CC blood. However, they do not show any difference in terms of clinical erectile score predictivity. Involvement of inflammatory cytokines isolated in CC in the genesis of ED requires further studies.
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Affiliation(s)
- Thierry Roumeguère
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium.,b Department of Urology , Erasme University Hospital, ULB , Brussels , Belgium
| | - Pierre Van Antwerpen
- c Laboratory of Pharmaceutical Chemistry , Institute of Pharmacy, ULB , Brussels , Belgium
| | - Henda Fathi
- b Department of Urology , Erasme University Hospital, ULB , Brussels , Belgium
| | - Alexandre Rousseau
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| | - Luc Vanhamme
- d Institute for Molecular Biology and Medicine (IBMM), ULB , Gosselies , Belgium
| | - Thierry Franck
- e Center for Oxygen Research and Development , Institute of Chemistry B6a, University of Liège , Liège , Belgium
| | - Carla Costa
- f Department of Experimental Biology and Department of Biochemistry (U38-FCT), Faculty of Medicine of Porto , Porto , Portugal
| | - Annamaria Morelli
- g Sexual Medicine and Andrology Unit, Department of Clinical Physiopathology , University of Florence , Florence , Italy
| | - Christophe Lelubre
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| | - Claude Hauzeur
- h Department of Urology , CHU de Charleroi , Charleroi , Belgium
| | - Martine Raes
- i Namur Research Institute for Life Sciences , Namur University , Namur , Belgium
| | - Didier Serteyn
- e Center for Oxygen Research and Development , Institute of Chemistry B6a, University of Liège , Liège , Belgium
| | - Eric Wespes
- h Department of Urology , CHU de Charleroi , Charleroi , Belgium
| | - Michel Vanhaeverbeek
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
| | - Karim Zouaoui Boudjeltia
- a Experimental Medicine Laboratory, ULB 222 Unit , ISPPC, CHU de Charleroi, A. Vésale Hospital , Montigny-Le-Tilleul , Belgium
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Myeloperoxidase-Oxidized LDLs Enhance an Anti-Inflammatory M2 and Antioxidant Phenotype in Murine Macrophages. Mediators Inflamm 2016; 2016:8249476. [PMID: 27656049 PMCID: PMC5021486 DOI: 10.1155/2016/8249476] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 07/28/2016] [Accepted: 08/02/2016] [Indexed: 12/02/2022] Open
Abstract
Macrophages and oxidized LDLs play a key role in atherogenesis but their heterogeneity has been neglected up to now. Macrophages are prone to polarization and subsets of polarized macrophages have been described in atheromas. LDLs can be oxidized not only chemically by copper (Ox-LDLs) but also enzymatically by myeloperoxidase (MpOx-LDLs) resulting in oxidized LDLs poor in lipid peroxides. The effects of physiologically relevant myeloperoxidase-oxidized LDLs on macrophage polarization or on polarized macrophages remain largely unknown. In this study, the effects of LDLs on macrophage polarization were investigated by monitoring the expression of M1 and M2 genes following stimulation with native LDLs, Ox-LDLs, or MpOx-LDLs in RAW 264.7 cells. Except for MRC1, which is induced only by Ox-LDLs, MpOx-LDLs induced an overexpression of most of the selected marker genes at the mRNA level. MpOx-LDLs also modulate marker gene expression in polarized macrophages favoring notably anti-inflammatory Arg1 expression in M2 cells and also in the other phenotypes. Noteworthy, MpOx-LDLs were the most efficient to accumulate lipids intracellularly in (un)polarized macrophages whatever the phenotype. These data were largely confirmed in murine bone marrow-derived macrophages. Our data suggest that MpOx-LDLs were the most efficient to accumulate within cells and to enhance an anti-inflammatory and antioxidant phenotype in M2 cells and also in the other macrophage phenotypes.
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Van Antwerpen P, Zouaoui Boudjeltia K. Rational drug design applied to myeloperoxidase inhibition. Free Radic Res 2015; 49:711-20. [DOI: 10.3109/10715762.2015.1027201] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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15
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Kantermann T, Duboutay F, Haubruge D, Hampton S, Darling AL, Berry JL, Kerkhofs M, Boudjeltia KZ, Skene DJ. The direction of shift-work rotation impacts metabolic risk independent of chronotype and social jetlag--an exploratory pilot study. Chronobiol Int 2014; 31:1139-45. [PMID: 25187988 DOI: 10.3109/07420528.2014.957295] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The aim of this pilot study was to explore the risk of metabolic abnormalities in steel workers employed in different shift-work rotations. Male workers in a steel factory [16 employed in a fast clockwise rotation (CW), 18 in slow counterclockwise rotation (CC), 9 day workers (DW); mean age 43.3 ± SD 6.8 years] with at least 5 years experience in their current work schedule participated. All workers provided fasting blood samples between 06:00 and 08:00 h for plasma glucose, insulin, apo-lipoproteins A and B (ApoA, ApoB), high- and low-density lipoproteins (HDL and LDL), total cholesterol (tCH), triglycerides (TG), minimally oxidized (mox) LDL, C-reactive protein (CRP), interleukin-8 (IL-8) and serum 25-hydroxyvitamin D (25(OH)D). HOMA index (homeostatic model assessment) was calculated to evaluate insulin resistance, beta cell function and risk of diabetes. Information on demographics, health, stimulants, sleep, social and work life, chronotype (phase of entrainment) and social jetlag (difference between mid-sleep on workdays and free days) as a surrogate for circadian disruption was collected by questionnaire. Neither chronotype nor social jetlag was associated with any of the metabolic risk blood markers. There were no significant differences in 25(OH)D, ApoA, ApoB, CRP, HDL, IL-8, insulin, LDL, mox-LDL, mox-LDL/ApoB ratio, tCH and TG levels between the three work groups. Although we did observe absolute differences in some of these markers, the small sample size of our study population might prevent these differences being statistically significant. Fasting glucose and HOMA index were significantly lower in CW compared to DW and CC, indicating lower metabolic risk. Reasons for the lower fasting glucose and HOMA index in CW workers remains to be clarified. Future studies of workers in different shift rotations are warranted to understand better the differential effects of shift-work on individual workers and their health indices.
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Affiliation(s)
- Thomas Kantermann
- Chronobiology Department, Centre for Behaviour and Neurosciences, University of Groningen , Groningen , The Netherlands
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16
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Bensalem S, Soubhye J, Aldib I, Bournine L, Nguyen AT, Vanhaeverbeek M, Rousseau A, Boudjeltia KZ, Sarakbi A, Kauffmann JM, Nève J, Prévost M, Stévigny C, Maiza-Benabdesselam F, Bedjou F, Van Antwerpen P, Duez P. Inhibition of myeloperoxidase activity by the alkaloids of Peganum harmala L. (Zygophyllaceae). JOURNAL OF ETHNOPHARMACOLOGY 2014; 154:361-369. [PMID: 24746482 DOI: 10.1016/j.jep.2014.03.070] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 02/05/2014] [Accepted: 03/28/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Seeds and aerial parts of Peganum harmala L. are widely used in Algeria as anti-inflammatory remedies. Evaluation of Peganum harmala total alkaloids extracts and pure β-carboline compounds as an anti-inflammatory treatment by the inhibition of an enzyme key of inflammatory, myeloperoxidase (MPO) and HPLC quantification of the alkaloids from the different parts of plant. MATERIALS AND METHODS MPO inhibition was tested using taurine chloramine test. The inhibition of LDL oxidation induced by MPO was carried out. The molecular docking analysis of Peganum harmala alkaloids on MPO was performed using the Glide XP docking protocol and scoring function and the redox potential of alkaloids was determined using an Epsilon potentiostat. The concentration of harmala alkaloids was determined using HPLC analysis. RESULTS The HPLC profiling of the active total alkaloids indicates that β-carboline e.g. harmine, harmaline, harmane, harmol and harmalol are major components. As β-carbolines resemble tryptamine, of which derivatives are efficient inhibitors of MPO, the harmala alkaloids were tested for their activity on this enzyme. Total alkaloids of the seeds and of the aerial parts strongly inhibited MPO at 20µg/mL (97±5% and 43±4%, respectively) whereas, at the same concentration, those of the roots showed very low inhibition (15±6%). Harmine, harmaline and harmane demonstrated a significant inhibition of MPO at IC50 of 0.26, 0.08 and 0.72µM respectively. These alkaloids exerted a similar inhibition effects on MPO-induced LDL oxidation. Molecular docking analysis of Peganum harmala alkaloids on MPO showed that all active Peganum harmala alkaloids have a high affinity on the active site of MPO (predicted free energies of binding up to -3.1kcal/mol). Measurement of redox potentials versus the normal hydrogen electrode clearly differentiated (i) the high MPO inhibitory activity of harmine, harmaline and harmane (+1014, 1014 and 1003mV, respectively); and (ii) the low activity of harmalol and harmol (+629/778 and 532/644mV, respectively). A reverse phase HPLC method has been developed to determine simultaneously five alkaloids of Peganum harmala. Seeds contained all five β-carboline derivatives with the main active alkaloids, harmaline and harmine, being up to 3.8% and 2.9%, respectively. Up to 3.2% of harmine was determined in the roots. The four β-carboline derivatives, harmine, harmaline, harmane and harmalol were identified in the aerial parts. The highest inhibitory effect observed in seeds and the moderate effect of aerial parts could be explained by their harmine and harmaline content. In contrast, the very weak inhibition of the root extract, despite the presence of harmine, may tentatively be explained by the high concentration of harmol which can reduce Compound II of MPO to the native form. CONCLUSION The inhibition of MPO by Peganum harmala β-carboline alkaloids, herein reported for the first time, may explain the anti-inflammatory effect traditionally attributed to its herbal medicine.
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Affiliation(s)
- Sihem Bensalem
- Laboratoire Biotechnologie Végétales et Ethnobotanique, Faculté des Sciences de la Nature et de la Vie, Université Abderrahmane Mira de Bejaia, 06000 Bejaia, Algérie; Laboratoire de Pharmacognosie, Bromatologie et Nutrition Humaine, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique.
| | - Jalal Soubhye
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique.
| | - Iyas Aldib
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Lamine Bournine
- Laboratoire Biotechnologie Végétales et Ethnobotanique, Faculté des Sciences de la Nature et de la Vie, Université Abderrahmane Mira de Bejaia, 06000 Bejaia, Algérie
| | - Anh Tho Nguyen
- Laboratoire de Pharmacognosie, Bromatologie et Nutrition Humaine, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Michel Vanhaeverbeek
- Laboratoire de Médicine Expérimentale, CHU Charleroi, A. Vesale Hospital, Université Libre de Bruxelles (ULB), Montigny-le-Tilleul, Belgique
| | - Alexandre Rousseau
- Laboratoire de Médicine Expérimentale, CHU Charleroi, A. Vesale Hospital, Université Libre de Bruxelles (ULB), Montigny-le-Tilleul, Belgique
| | - Karim Zouaoui Boudjeltia
- Laboratoire de Médicine Expérimentale, CHU Charleroi, A. Vesale Hospital, Université Libre de Bruxelles (ULB), Montigny-le-Tilleul, Belgique
| | - Ahmad Sarakbi
- Laboratoire de Chimie Analytique Instrumentale et Bioélectrochimie, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Jean Michel Kauffmann
- Laboratoire de Chimie Analytique Instrumentale et Bioélectrochimie, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Jean Nève
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Martine Prévost
- Laboratoire de Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Caroline Stévigny
- Laboratoire de Pharmacognosie, Bromatologie et Nutrition Humaine, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Fadila Maiza-Benabdesselam
- Laboratoire Biotechnologie Végétales et Ethnobotanique, Faculté des Sciences de la Nature et de la Vie, Université Abderrahmane Mira de Bejaia, 06000 Bejaia, Algérie
| | - Fatiha Bedjou
- Laboratoire Biotechnologie Végétales et Ethnobotanique, Faculté des Sciences de la Nature et de la Vie, Université Abderrahmane Mira de Bejaia, 06000 Bejaia, Algérie
| | - Pierre Van Antwerpen
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique; Plateforme Analytique, Faculté de Pharmacie, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
| | - Pierre Duez
- Laboratoire de Pharmacognosie, Bromatologie et Nutrition Humaine, Université Libre de Bruxelles (ULB), 1050 Bruxelles, Belgique
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17
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Delporte C, Boudjeltia KZ, Noyon C, Furtmüller PG, Nuyens V, Slomianny MC, Madhoun P, Desmet JM, Raynal P, Dufour D, Koyani CN, Reyé F, Rousseau A, Vanhaeverbeek M, Ducobu J, Michalski JC, Nève J, Vanhamme L, Obinger C, Malle E, Van Antwerpen P. Impact of myeloperoxidase-LDL interactions on enzyme activity and subsequent posttranslational oxidative modifications of apoB-100. J Lipid Res 2014; 55:747-57. [PMID: 24534704 DOI: 10.1194/jlr.m047449] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Oxidation of LDL by the myeloperoxidase (MPO)-H2O2-chloride system is a key event in the development of atherosclerosis. The present study aimed at investigating the interaction of MPO with native and modified LDL and at revealing posttranslational modifications on apoB-100 (the unique apolipoprotein of LDL) in vitro and in vivo. Using amperometry, we demonstrate that MPO activity increases up to 90% when it is adsorbed at the surface of LDL. This phenomenon is apparently reflected by local structural changes in MPO observed by circular dichroism. Using MS, we further analyzed in vitro modifications of apoB-100 by hypochlorous acid (HOCl) generated by the MPO-H2O2-chloride system or added as a reagent. A total of 97 peptides containing modified residues could be identified. Furthermore, differences were observed between LDL oxidized by reagent HOCl or HOCl generated by the MPO-H2O2-chloride system. Finally, LDL was isolated from patients with high cardiovascular risk to confirm that our in vitro findings are also relevant in vivo. We show that several HOCl-mediated modifications of apoB-100 identified in vitro were also present on LDL isolated from patients who have increased levels of plasma MPO and MPO-modified LDL. In conclusion, these data emphasize the specificity of MPO to oxidize LDL.
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Affiliation(s)
- Cédric Delporte
- Laboratory of Pharmaceutical Chemistry Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
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18
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Boufadi YM, Soubhye J, Riazi A, Rousseau A, Vanhaeverbeek M, Nève J, Boudjeltia KZ, Van Antwerpen P. Characterization and antioxidant properties of six Algerian propolis extracts: ethyl acetate extracts inhibit myeloperoxidase activity. Int J Mol Sci 2014; 15:2327-45. [PMID: 24514562 PMCID: PMC3958853 DOI: 10.3390/ijms15022327] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/18/2014] [Accepted: 01/23/2014] [Indexed: 12/12/2022] Open
Abstract
Because propolis contains many types of antioxidant compounds such as polyphenols and flavonoids, it can be useful in preventing oxidative damages. Ethyl acetate extracts of propolis from several Algerian regions show high activity by scavenging free radicals, preventing lipid peroxidation and inhibiting myeloperoxidase (MPO). By fractioning and assaying ethyl acetate extracts, it was observed that both polyphenols and flavonoids contribute to these activities. A correlation was observed between the polyphenol content and the MPO inhibition. However, it seems that kaempferol, a flavonoid, contributes mainly to the MPO inhibition. This molecule is in a high amount in the ethyl acetate extract and demonstrates the best efficiency towards the enzyme with an inhibiting concentration at 50% of 4 ± 2 µM.
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Affiliation(s)
- Yasmina Mokhtaria Boufadi
- Laboratory of Beneficial Microorganisms, Functional Food and Health (LMBAFS), Faculty of Natural Sciences and Life, University of Abdelhamid Ibn Badis, Mostaganem 27000, Algeria.
| | - Jalal Soubhye
- Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, Universite Libre de Bruxelles, Brussels 1050, Belgium.
| | - Ali Riazi
- Laboratory of Beneficial Microorganisms, Functional Food and Health (LMBAFS), Faculty of Natural Sciences and Life, University of Abdelhamid Ibn Badis, Mostaganem 27000, Algeria.
| | - Alexandre Rousseau
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Universite Libre de Bruxelles, Montigny-le-Tilleul 6110, Belgium.
| | - Michel Vanhaeverbeek
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Universite Libre de Bruxelles, Montigny-le-Tilleul 6110, Belgium.
| | - Jean Nève
- Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, Universite Libre de Bruxelles, Brussels 1050, Belgium.
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Universite Libre de Bruxelles, Montigny-le-Tilleul 6110, Belgium.
| | - Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry, Faculty of Pharmacy, Universite Libre de Bruxelles, Brussels 1050, Belgium.
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19
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Low-density lipoprotein modified by myeloperoxidase in inflammatory pathways and clinical studies. Mediators Inflamm 2013; 2013:971579. [PMID: 23983406 PMCID: PMC3742028 DOI: 10.1155/2013/971579] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 06/26/2013] [Indexed: 02/07/2023] Open
Abstract
Oxidation of low-density lipoprotein (LDL) has a key role in atherogenesis. Among the different models of oxidation that have been studied, the one using myeloperoxidase (MPO) is thought to be more physiopathologically relevant. Apolipoprotein B-100 is the unique protein of LDL and is the major target of MPO. Furthermore, MPO rapidly adsorbs at the surface of LDL, promoting oxidation of amino acid residues and formation of oxidized lipoproteins that are commonly named Mox-LDL. The latter is not recognized by the LDL receptor and is accumulated by macrophages. In the context of atherogenesis, Mox-LDL accumulates in macrophages leading to foam cell formation. Furthermore, Mox-LDL seems to have specific effects and triggers inflammation. Indeed, those oxidized lipoproteins activate endothelial cells and monocytes/macrophages and induce proinflammatory molecules such as TNFα and IL-8. Mox-LDL may also inhibit fibrinolysis mediated via endothelial cells and consecutively increase the risk of thrombus formation. Finally, Mox-LDL has been involved in the physiopathology of several diseases linked to atherosclerosis such as kidney failure and consequent hemodialysis therapy, erectile dysfunction, and sleep restriction. All these issues show that the investigations of MPO-dependent LDL oxidation are of importance to better understand the inflammatory context of atherosclerosis.
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20
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Soubhye J, Aldib I, Elfving B, Gelbcke M, Furtmüller PG, Podrecca M, Conotte R, Colet JM, Rousseau A, Reye F, Sarakbi A, Vanhaeverbeek M, Kauffmann JM, Obinger C, Nève J, Prévost M, Zouaoui Boudjeltia K, Dufrasne F, Van Antwerpen P. Design, synthesis, and structure-activity relationship studies of novel 3-alkylindole derivatives as selective and highly potent myeloperoxidase inhibitors. J Med Chem 2013; 56:3943-58. [PMID: 23581551 DOI: 10.1021/jm4001538] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Due to its production of potent antimicrobial oxidants including hypochlorous acid, human myeloperoxidase (MPO) plays a critical role in innate immunity and inflammatory diseases. Thus MPO is an attractive target in drug design. (Aminoalkyl)fluoroindole derivatives were detected to be very potent MPO inhibitors; however, they also promote inhibition of the serotonin reuptake transporter (SERT) at the same concentration range. Via structure-based drug design, a new series of MPO inhibitors derived from 3-alkylindole were synthesized and their effects were assessed on MPO-mediated taurine chlorination and low-density lipoprotein oxidation as well as on inhibition of SERT. The fluoroindole compound with three carbons in the side chain and one amide group exhibited a selectivity index of 35 (Ki/IC50) with high inhibition of MPO activity (IC50 = 18 nM), whereas its effect on SERT was in the micromolar range. Structure-function relationships, mechanism of action, and safety of the molecule are discussed.
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Affiliation(s)
- Jalal Soubhye
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, 1050 Brussels, Belgium
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21
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Aldib I, Soubhye J, Zouaoui Boudjeltia K, Vanhaeverbeek M, Rousseau A, Furtmüller PG, Obinger C, Dufrasne F, Nève J, Van Antwerpen P, Prévost M. Evaluation of New Scaffolds of Myeloperoxidase Inhibitors by Rational Design Combined with High-Throughput Virtual Screening. J Med Chem 2012; 55:7208-18. [DOI: 10.1021/jm3007245] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Iyas Aldib
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Jalal Soubhye
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimentral Medicine, CHU Charleroi, A. Vesale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Michel Vanhaeverbeek
- Laboratory of Experimentral Medicine, CHU Charleroi, A. Vesale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Alexandre Rousseau
- Laboratory of Experimentral Medicine, CHU Charleroi, A. Vesale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Paul G. Furtmüller
- Department of Chemistry, Division of Biochemistry at the Vienna Institute of BioTechnology, BOKU—University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna
| | - Christian Obinger
- Department of Chemistry, Division of Biochemistry at the Vienna Institute of BioTechnology, BOKU—University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna
| | - Francois Dufrasne
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Jean Nève
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Pierre Van Antwerpen
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
- Analytical Platform of the Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Martine Prévost
- Laboratoire de Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles, Brussels, Belgium
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22
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Zouaoui Boudjeltia K, Daher J, Van Antwerpen P, Moguilevsky N, Delree P, Ducobu J, Raes M, Badran B, Vanhaeverbeek M, Brohee D, Remacle C, Vanhamme L. Exposure of endothelial cells to physiological levels of myeloperoxidase-modified LDL delays pericellular fibrinolysis. PLoS One 2012; 7:e38810. [PMID: 22723891 PMCID: PMC3378590 DOI: 10.1371/journal.pone.0038810] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Accepted: 05/14/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Blood fluidity is maintained by a delicate balance between coagulation and fibrinolysis. The endothelial cell surface is a key player in this equilibrium and cell surface disruptions can upset the balance. We investigated the role of pericellular myeloperoxidase oxidized LDLs (Mox-LDLs) in this balance. METHODS AND RESULTS We designed a technical device that enabled us to monitor fibrinolysis in real-time at the surface of an endothelial cell line (EA.hy926), and showed that Mox-LDL decreased pericellular fibrinolysis. There were no changes in fibrinolysis when EA.hy926 endothelial cells were exposed to native LDL (24 hours) at doses of 10, 50, 100 and up to 1250 µg/ml. However, treatment of EA.hy926 endothelial cells with 10 and 50 µg/ml of Mox-LDL (physiological serum concentrations) increased the lysis time by 15 and 13%, respectively (p<0.001), although this effect was not present at higher concentrations of 100 µg/ml. This effect was not correlated with any changes in PAI-1 or t-PA or PA Receptor (PAR) expression. No effect was observed at the surface of smooth muscle cells used as controls. CONCLUSION Our data link the current favorite hypothesis that modified LDL has a causal role in atheroma plaque formation with an old suggestion that fibrin may also play a causal role. Our data help complete the paradigm of atherosclerosis: Modified LDL locally enhances fibrin deposition (present work); fibrin deposits enhance endothelial permeability; this effect allows subendothelial accumulation of lipid and foam cells.
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Affiliation(s)
- Karim Zouaoui Boudjeltia
- Experimental Medicine Laboratory, Université Libre de Bruxelles 222 Unit, CHU Charleroi, A. Vésale, Montigny-Le-Tilleul, Belgium.
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23
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Zouaoui Boudjeltia K, Faraut B, Esposito MJ, Stenuit P, Dyzma M, Van Antwerpen P, Brohée D, Vanhamme L, Moguilevsky N, Vanhaeverbeek M, Kerkhofs M. Temporal dissociation between myeloperoxidase (MPO)-modified LDL and MPO elevations during chronic sleep restriction and recovery in healthy young men. PLoS One 2011; 6:e28230. [PMID: 22140557 PMCID: PMC3227655 DOI: 10.1371/journal.pone.0028230] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 11/04/2011] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES Many studies have evaluated the ways in which sleep disturbances may influence inflammation and the possible links of this effect to cardiovascular risk. Our objective was to investigate the effects of chronic sleep restriction and recovery on several blood cardiovascular biomarkers. METHODS AND RESULTS Nine healthy male non-smokers, aged 22-29 years, were admitted to the Sleep Laboratory for 11 days and nights under continuous electroencephalogram polysomnography. The study consisted of three baseline nights of 8 hours sleep (from 11 pm to 7 am), five sleep-restricted nights, during which sleep was allowed only between 1 am and 6 am, and three recovery nights of 8 hours sleep (11 pm to 7 am). Myeloperoxidase-modified low-density lipoprotein levels increased during the sleep-restricted period indicating an oxidative stress. A significant increase in the quantity of slow-wave sleep was measured during the first recovery night. After this first recovery night, insulin-like growth factor-1 levels increased and myeloperoxidase concentration peaked. CONCLUSIONS We observed for the first time that sleep restriction and the recovery process are associated with differential changes in blood biomarkers of cardiovascular disease.
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Affiliation(s)
- Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Brice Faraut
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
- Sleep Laboratory, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Maria José Esposito
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
- Sleep Laboratory, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Patricia Stenuit
- Sleep Laboratory, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Michal Dyzma
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
- Sleep Laboratory, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry, Université Libre de Bruxelles, Brussels, Belgium
| | - Dany Brohée
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Luc Vanhamme
- Laboratory of Molecular Parasitology, Institute for Molecular Biology and Medicine, Université Libre de Bruxelles, Gosselies, Belgium
| | | | - Michel Vanhaeverbeek
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Myriam Kerkhofs
- Laboratory of Experimental Medicine, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
- Sleep Laboratory, Centre Hospitalo-Universitaire de Charleroi, André Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
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Soubhye J, Prévost M, Van Antwerpen P, Zouaoui Boudjeltia K, Rousseau A, Furtmüller PG, Obinger C, Vanhaeverbeek M, Ducobu J, Nève J, Gelbcke M, Dufrasne F. Structure-Based Design, Synthesis, and Pharmacological Evaluation of 3-(Aminoalkyl)-5-fluoroindoles as Myeloperoxidase Inhibitors. J Med Chem 2010; 53:8747-59. [DOI: 10.1021/jm1009988] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jalal Soubhye
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Martine Prévost
- Laboratoire de Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles, Brussels, Belgium
| | - Pierre Van Antwerpen
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
- Analytical Platform of the Faculty of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
| | - Karim Zouaoui Boudjeltia
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Alexandre Rousseau
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Paul G. Furtmüller
- Department of Chemistry, Division of Biochemistry, BOKU—University of Natural Resources and Life Sciences, Vienna, Austria
| | - Christian Obinger
- Department of Chemistry, Division of Biochemistry, BOKU—University of Natural Resources and Life Sciences, Vienna, Austria
| | - Michel Vanhaeverbeek
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Jean Ducobu
- Laboratory of Experimental Medicine, CHU Charleroi, A. Vésale Hospital, Université Libre de Bruxelles, Montigny-le-Tilleul, Belgium
| | - Jean Nève
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Michel Gelbcke
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Franc¸ois Dufrasne
- Laboratoire de Chimie Pharmaceutique Organique, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
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Calay D, Rousseau A, Mattart L, Nuyens V, Delporte C, Van Antwerpen P, Moguilevsky N, Arnould T, Boudjeltia KZ, Raes M. Copper and myeloperoxidase-modified LDLs activate Nrf2 through different pathways of ROS production in macrophages. Antioxid Redox Signal 2010; 13:1491-502. [PMID: 20446765 DOI: 10.1089/ars.2009.2971] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Low-density lipoprotein (LDL) oxidation is a key step in atherogenesis, promoting the formation of lipid-laden macrophages. Here, we compared the effects of copper-oxidized LDLs (OxLDLs) and of the more physiologically relevant myeloperoxidase-oxidized LDLs (MoxLDLs) in murine RAW264.7 macrophages and in human peripheral blood monocyte-derived macrophages. Both oxidized LDLs, contrary to native LDLs, induced foam cell formation and an intracellular accumulation of reactive oxygen species (ROS). This oxidative stress was responsible for the activation of the NF-E2-related factor 2 (Nrf2) transcription factor, and the subsequent Nrf2-dependent overexpression of the antioxidant genes, Gclm and HO-1, as evidenced by the invalidation of Nrf2 by RNAi. MoxLDLs always induced a stronger response than OxLDLs. These differences could be partly explained by specific ROS-producing mechanisms differing between OxLDLs and MoxLDLs. Whereas both types of oxidized LDLs caused ROS production partly by NADPH oxidase, only MoxLDLs-induced ROS production was dependent on cytosolic PLA2. This study highlights that OxLDLs and MoxLDLs induce an oxidative stress, through distinct ROS-producing mechanisms, which is responsible for the differential activation of the Nrf2 pathway. These data clearly suggest that results obtained until now with copper oxidized-LDLs should be carefully reevaluated, taking into consideration physiologically more relevant oxidized LDLs.
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Affiliation(s)
- Damien Calay
- Laboratory of Biochemistry and Cellular Biology, University of Namur (FUNDP)—URBC, Namur, Belgium.
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26
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Van Antwerpen P, Slomianny MC, Boudjeltia KZ, Delporte C, Faid V, Calay D, Rousseau A, Moguilevsky N, Raes M, Vanhamme L, Furtmüller PG, Obinger C, Vanhaeverbeek M, Nève J, Michalski JC. Glycosylation pattern of mature dimeric leukocyte and recombinant monomeric myeloperoxidase: glycosylation is required for optimal enzymatic activity. J Biol Chem 2010; 285:16351-9. [PMID: 20332087 DOI: 10.1074/jbc.m109.089748] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The involvement of myeloperoxidase (MPO) in various inflammatory conditions has been the scope of many recent studies. Besides its well studied catalytic activity, the role of its overall structure and glycosylation pattern in biological function is barely known. Here, the N-glycan composition of native dimeric human MPO purified from neutrophils and of monomeric MPO recombinantly expressed in Chinese hamster ovary cells has been investigated. Analyses showed the presence of five N-glycans at positions 323, 355, 391, 483, 729 in both proteins. Site by site analysis demonstrated a well conserved micro- and macro-heterogeneity and more complex-type N-glycans for the recombinant form. Comparison of biological functionality of glycosylated and deglycosylated recombinant MPO suggests that glycosylation is required for optimal enzymatic activity. Data are discussed with regard to biosynthesis and the three-dimensional structure of MPO.
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Affiliation(s)
- Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry and the Analytical Platform of Institute of Pharmacy, UniversitéLibre de Bruxelles, Brussels, Belgium.
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27
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Roumeguère T, Zouaoui Boudjeltia K, Babar S, Nuyens V, Rousseau A, Van Antwerpen P, Ducobu J, Wespes E, Vanhaeverbeek M. Effects of Phosphodiesterase Inhibitors on the Inflammatory Response of Endothelial Cells Stimulated by Myeloperoxidase-Modified Low-Density Lipoprotein or Tumor Necrosis Factor Alpha. Eur Urol 2010; 57:522-8. [DOI: 10.1016/j.eururo.2009.01.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2008] [Accepted: 01/13/2009] [Indexed: 10/21/2022]
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28
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Abstract
Oxidized low-density lipoprotein (Ox-LDL) has been studied for over 25 years. Numerous pro- and anti-atherogenic properties have been attributed to Ox-LDL. Yet, Ox-LDL has neither been defined nor characterized, as its components and composition change depending on its source, method of preparation, storage, and use. It contains unoxidized and oxidized fatty acid derivatives both in the ester and free forms, their decomposition products, cholesterol and its oxidized products, proteins with oxidized amino acids and cross-links, and polypeptides with varying extents of covalent modification with lipid oxidation products, and many others. It seems to exist in vivo in some form not yet fully characterized. Until its pathophysiological significance, and how it is generated in vivo are determined, the nature of its true identity will be only of classical interest. In this review, its components, their biological actions and methods of preparation will be discussed.
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Affiliation(s)
- Sampath Parthasarathy
- Division of Cardiothoracic Surgery, The Ohio State University Medical Center, Columbus, OH, USA
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29
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Zouaoui Boudjeltia K, Tragas G, Babar S, Moscariello A, Nuyens V, Van Antwerpen P, Gilbert O, Ducobu J, Brohee D, Vanhaeverbeek M, Van Meerhaeghe A. Effects of oxygen therapy on systemic inflammation and myeloperoxidase modified LDL in hypoxemic COPD patients. Atherosclerosis 2009; 205:360-2. [DOI: 10.1016/j.atherosclerosis.2009.01.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Revised: 01/20/2009] [Accepted: 01/20/2009] [Indexed: 11/26/2022]
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Lopes-Virella MF, Virella G. Clinical significance of the humoral immune response to modified LDL. Clin Immunol 2009; 134:55-65. [PMID: 19427818 DOI: 10.1016/j.clim.2009.04.001] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Accepted: 04/03/2009] [Indexed: 12/31/2022]
Abstract
Human low density lipoprotein (LDL) undergoes oxidation and glycation in vivo. By themselves, oxidized LDL (oxLDL) and AGE-LDL have proinflammatory properties and are considered atherogenic. But the atherogenicity of these lipoproteins are significantly increased as a consequence of the formation of immune complexes (IC) involving specific autoantibodies. OxLDL and AGE antibodies have been shown to be predominantly of the IgG1 and IgG3 isotypes. OxLDL antibodies are able to activate the complement system by the classical pathway and to induce FcR-mediated phagocytosis. In vitro and ex vivo studies performed with modified LDL-IC have proven their pro-inflammatory and atherogenic properties. Clinical studies have demonstrated that the levels of circulating modified LDL-IC correlate with parameters indicative of cardiovascular and renal disease in diabetic patients and other patient populations. The possibility that spontaneously formed or induced modified LDL antibodies (particularly IgM oxLDL antibodies) may have a protective effect has been suggested, but the data is unclear and needs to be further investigated.
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Van Antwerpen P, Moreau P, Zouaoui Boudjeltia K, Babar S, Dufrasne F, Moguilevsky N, Vanhaeverbeek M, Ducobu J, Nève J. Development and validation of a screening procedure for the assessment of inhibition using a recombinant enzyme. Talanta 2008; 75:503-10. [DOI: 10.1016/j.talanta.2007.11.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2007] [Revised: 11/14/2007] [Accepted: 11/14/2007] [Indexed: 11/24/2022]
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Van Antwerpen P, Néve J, Moreau P, Boudjeltia KZ, Vanhaeverbeek M, Prévost M, Babar S, Legssyer I, Moguilevsky N, Ducobu J. Probucol Does not Inhibit Myeloperoxidase-Dependent Low-Density Lipoprotein Oxidation as a Potent Protective Effect in Atherosclerosis. J Cardiovasc Pharmacol 2007; 50:350-1. [PMID: 17878766 DOI: 10.1097/fjc.0b013e31809501dc] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Van Antwerpen P, Dufrasne F, Lequeux M, Boudjeltia KZ, Lessgyer I, Babar S, Moreau P, Moguilevsky N, Vanhaeverbeek M, Ducobu J, Nève J. Inhibition of the myeloperoxidase chlorinating activity by non-steroidal anti-inflammatory drugs: Flufenamic acid and its 5-chloro-derivative directly interact with a recombinant human myeloperoxidase to inhibit the synthesis of hypochlorous acid. Eur J Pharmacol 2007; 570:235-43. [PMID: 17610876 DOI: 10.1016/j.ejphar.2007.05.057] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2006] [Revised: 05/25/2007] [Accepted: 05/29/2007] [Indexed: 11/24/2022]
Abstract
The present in vitro study was designed to assess the inhibition of the myeloperoxidase (MPO)/H(2)O(2)/Cl(-) system by several non steroidal anti-inflammatory drugs (NSAIDs) of the oxicam family and of nimesulide and to compare their effect with flufenamic acid in order to investigate their influence on the chlorinating activity of MPO as a protective mechanism during chronic inflammatory syndromes. The inhibition of the system was assessed by measurement of the taurine chlorination while the accumulation of compound II was used to investigate the mechanism of inhibition. The oxidation products of NSAIDs by the MPO/H(2)O(2)/Cl(-) system were identified and flufenamic acid and derivatives were also assessed in the inhibition of LDL oxidation in two models. Flufenamic acid (IC(50) = 1.1+/-0.3 microM) is the most efficient inhibitor of the MPO/H(2)O(2)/Cl(-) system and nimesulide (IC(50) = 2.1+/-0.3 microM) is more active than the other NSAIDs of the oxicam family (IC(50) = 8-12 microM). The accumulation of compound II revealed that flufenamic acid acts as an electron donor while the other NSAIDs are antagonists of chloride anions. The identification of the oxidation products confirms that flufenamic behaves like an electron donor and is directly oxidized in the 5-hydroxy-derivative but gives also the 5-chloro-derivative which similarly inhibits the MPO/H(2)O(2)/Cl(-) system. Flufenamic acid has the best inhibiting activity towards the MPO/H(2)O(2)/Cl(-) system. However, in models that assess the LDL oxidation, flufenamic acid and its derivatives were unable to properly inhibit MPO activity as the enzyme is adsorbed on macrostructures such as LDL molecules.
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Affiliation(s)
- Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry, Institute of Pharmacy, Université Libre de Bruxelles, Campus Plaine 205-5, B-1050 Brussels, Belgium
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Boudjeltia KZ, Legssyer I, Van Antwerpen P, Kisoka RL, Babar S, Moguilevsky N, Delree P, Ducobu J, Remacle C, Vanhaeverbeek M, Brohee D. Triggering of inflammatory response by myeloperoxidase-oxidized LDL. Biochem Cell Biol 2007; 84:805-12. [PMID: 17167545 DOI: 10.1139/o06-061] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The oxidation theory proposes that LDL oxidation is an early event in atherosclerosis and that oxidized LDL contributes to atherogenesis in triggering inflammation. In contrast to the copper-modified LDL, there are few studies using myeloperoxidase-modified LDL (Mox-LDL) as an inflammation inducer. Our aim is to test whether Mox-LDL could constitute a specific inducer of the inflammatory response. Albumin, which is the most abundant protein in plasma and which is present to an identical concentration of LDL in the intima, was used for comparison. The secretion of IL-8 by endothelial cells (Ea.hy926) and TNF-alpha by monocytes (THP-1) was measured in the cell medium after exposure of these cells to native LDL, native albumin, Mox-LDL, or Mox-albumin. We observed that Mox-LDL induced a 1.5- and 2-fold increase (ANOVA; P < 0.001) in IL-8 production at 100 microg/mL and 200 microg/mL, respectively. The incubation of THP-1 cells with Mox-LDL (100 microg/mL) increased the production of TNF-alpha 2-fold over the control. Native LDL, albumin, and Mox-albumin showed no effect in either cellular types. The myeloperoxidase-modified LDL increase in cytokine release by endothelial and monocyte cells and by firing both local and systemic inflammation could induce atherogenesis and its development.
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Affiliation(s)
- Karim Zouaoui Boudjeltia
- Experimental Medicine Laboratory. Université de Bruxelles, Unit 222, ISPPC, CHU André Vésale, 706, route de Gozée, 6110 Montigny-Le-Tilleul, Belgium.
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35
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Zouaoui Boudjeltia K, Roumeguere T, Delree P, Moguilevsky N, Ducobu J, Vanhaeverbeek M, Wespes E. Presence of LDL modified by myeloperoxidase in the penis in patients with vascular erectile dysfunction: a preliminary study. Eur Urol 2006; 51:262-8; discussion 268-9. [PMID: 17007997 DOI: 10.1016/j.eururo.2006.08.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Accepted: 08/22/2006] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Erectile dysfunction (ED) is a major vascular disorder. Atherosclerosis is closely related to lipoprotein metabolism and especially, oxidative modifications of low-density lipoproteins (LDLs), which are involved in early development of the atherosclerotic lesions. Current major questions include how LDLs are oxidised (OxLDL) in vivo. Myeloperoxidase (MPO) is an enzyme present in the azurophile granules of neutrophils and monocytes that can contribute to LDL oxidation in the presence of H(2)O(2). We have developed a new monoclonal antibody against LDL modified by MPO (Mox-LDL) and have used it on penile biopsies from patients operated on for penile implant. METHODS Seven patients with vascular ED and one impotent patient after radical prostatectomy (RP) underwent biopsy of the cavernous body during penile implant procedures. An immunohistochemical study with a monoclonal antibody against Mox-LDL and an antibody against apoprotein B (ApoB), the protein moiety of LDL, to confirm the presence of LDL was performed. RESULTS The staining was positive for Mox-LDL and ApoB and was present between the endothelial cells of the sinusoid spaces and the smooth muscle cells in the seven patients with vascular ED. The patient with RP was negative for Mox-LDL. DISCUSSION Because it is known that modified LDL could decrease nitric oxide production, Mox-LDL could be one of the agents responsible for ED. Further studies are needed to confirm this hypothesis.
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Affiliation(s)
- Karim Zouaoui Boudjeltia
- Experimental Medicine Laboratory, ULB 222 Unit, ISPPC, CHU de Charleroi, Hôpital A. Vésale, Montigny-Le-Tilleul, Belgium
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36
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Zouaoui Boudjeltia K, Gregoir C, Guillaume M, Remacle C, Piro P, Garbar C, Ducobu J, Moguilevsky N, Vanhaeverbeek M, Delree P, Brohee D. Antigens and granularity of blood monocytes in relation to inflammatory markers and lipids in postmenopausal women. Maturitas 2006; 55:132-41. [DOI: 10.1016/j.maturitas.2005.12.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2005] [Revised: 12/09/2005] [Accepted: 12/13/2005] [Indexed: 10/25/2022]
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Malle E, Marsche G, Arnhold J, Davies MJ. Modification of low-density lipoprotein by myeloperoxidase-derived oxidants and reagent hypochlorous acid. Biochim Biophys Acta Mol Cell Biol Lipids 2006; 1761:392-415. [PMID: 16698314 DOI: 10.1016/j.bbalip.2006.03.024] [Citation(s) in RCA: 316] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 03/27/2006] [Accepted: 03/28/2006] [Indexed: 10/24/2022]
Abstract
Substantial evidence supports the notion that oxidative processes contribute to the pathogenesis of atherosclerosis and coronary heart disease. The nature of the oxidants that give rise to the elevated levels of oxidised lipids and proteins, and decreased levels of antioxidants, detected in human atherosclerotic lesions are, however, unclear, with multiple species having been invoked. Over the last few years, considerable data have been obtained in support of the hypothesis that oxidants generated by the heme enzyme myeloperoxidase play a key role in oxidation reactions in the artery wall. In this article, the evidence for a role of myeloperoxidase, and oxidants generated therefrom, in the modification of low-density lipoprotein, the major source of lipids in atherosclerotic lesions, is reviewed. Particular emphasis is placed on the reactions of the reactive species generated by this enzyme, the mechanisms and sites of damage, the role of modification of the different components of low-density lipoprotein, and the biological consequences of such oxidation on cell types present in the artery wall and in the circulation, respectively.
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Affiliation(s)
- Ernst Malle
- Medical University Graz, Center of Molecular Medicine, Institute of Molecular Biology and Biochemistry, Harrachgasse 21, A-8010 Graz, Austria.
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Van Antwerpen P, Boudjeltia KZ, Vaes M, Babar S, Madhoun P, Moguilevsky N, Vanhaeverbeek M, Néve J, Ducobu J. The pleiotropic effect of statins in haemodialysis patients is not the consequence of an inhibition of LDL oxidation by myeloperoxidase. Nephrol Dial Transplant 2006; 21:2672-4. [PMID: 16574674 DOI: 10.1093/ndt/gfl143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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39
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Van Antwerpen P, Legssyer I, Zouaoui Boudjeltia K, Babar S, Moreau P, Moguilevsky N, Vanhaeverbeek M, Ducobu J, Nève J. Captopril inhibits the oxidative modification of apolipoprotein B-100 caused by myeloperoxydase in a comparative in vitro assay of angiotensin converting enzyme inhibitors. Eur J Pharmacol 2006; 537:31-6. [PMID: 16631159 DOI: 10.1016/j.ejphar.2006.03.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Revised: 01/31/2006] [Accepted: 03/13/2006] [Indexed: 10/24/2022]
Abstract
The oxidative modification of low-density lipoproteins (LDL) is a key event in the formation of atheromatous lesions. Indeed, oxidized derivatives accumulate in the vascular wall and promote a local inflammatory process which triggers the progression of the atheromatous plaque. Myeloperoxidase (MPO) has been mentioned as a major contributor to this oxidative process. It takes part in the oxidation both of lipids by chlorination and peroxidation and of apolipoprotein B-100. Based on recent observations with several anti-inflammatory and thiol-containing drugs, the present study was designed to test the hypothesis that anti-hypertensive agents from the angiotensin converting enzyme (ACE) inhibitors group inhibit the oxidative modifications of Apo B-100 caused by MPO. Captopril, ramipril, enalapril, lisinopril and fosinopril were assessed by measuring: their inhibiting effect on the MPO/H(2)O(2)/Cl(-) system, the accumulation of compound II, which reflects the inhibition of the synthesis of HOCl and the LDL oxidation by MPO in presence of several concentrations of ACE inhibitors. Only captopril, a thiol-containing ACE inhibitor, was able to significantly decrease the oxidative modification of LDL in a dose dependent manner and this by scavenging HOCl. This efficient anti-hypertensive drug therefore appears to also protect against the atherosclerotic process by this newly documented mechanism.
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Affiliation(s)
- Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry, Institute of Pharmacy, Université Libre de Bruxelles, Campus Plaine 205-5, B-1050 Brussels, Belgium
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40
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Van Antwerpen P, Boudjeltia KZ, Babar S, Legssyer I, Moreau P, Moguilevsky N, Vanhaeverbeek M, Ducobu J, Nève J. Thiol-containing molecules interact with the myeloperoxidase/H2O2/chloride system to inhibit LDL oxidation. Biochem Biophys Res Commun 2005; 337:82-8. [PMID: 16171780 DOI: 10.1016/j.bbrc.2005.09.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2005] [Accepted: 09/02/2005] [Indexed: 11/25/2022]
Abstract
Oxidized low-density lipoproteins (LDL) accumulate in the vascular wall and promote a local inflammatory process contributing to the progression of atheromatous plaque. The key role of myeloperoxidase (MPO) in this process has been documented and the enzyme has been involved in the oxidative modification of apolipoprotein B-100 in the intima and at the surface of endothelial cells. As the inhibition of this last phenomenon could be of relevance in pharmacological interventions, thiol-containing molecules such as glutathione, captopril, and N-acetylcysteine (NAC) and its lysinate salt (NAL) were tested in this system and their properties were compared with those of flufenamic acid (control). This last compound already demonstrated an inhibition of the production of HOCl by MPO and a more intense inhibition of MPO activity than glutathione, NAC, NAL, and captopril. However, NAC and NAL inhibited the oxidative modification of LDL more intensively than captopril and glutathione whereas flufenamic acid had no comparable inhibiting effect. This could be related to the presence of LDL close to the catalytic site of the enzyme. NAC and NAL therefore appeared as the most efficient inhibitors probably as a consequence of their relatively small size. The relevance of such effects has to be documented by in vivo studies.
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Affiliation(s)
- Pierre Van Antwerpen
- Laboratory of Pharmaceutical Chemistry, Institute of Pharmacy, Université Libre de Bruxelles, Brussels, Belgium
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Zouaoui Boudjeltia K, Moguilevsky N, Legssyer I, Babar S, Guillaume M, Delree P, Vanhaeverbeek M, Brohee D, Ducobu J, Remacle C. Oxidation of low density lipoproteins by myeloperoxidase at the surface of endothelial cells: an additional mechanism to subendothelium oxidation. Biochem Biophys Res Commun 2005; 325:434-8. [PMID: 15530411 DOI: 10.1016/j.bbrc.2004.10.049] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2004] [Indexed: 11/29/2022]
Abstract
The present paradigm of atherogenesis proposes that low density lipoproteins (LDL) are trapped in subendothelial space of the vascular wall where they are oxidized. Myeloperoxidase (MPO) plays a key role in oxidative damage. We propose that LDL oxidation by myeloperoxidase (Mox-LDL) could occur at the surface of the endothelial cells and not restricted to the subendothelial space. The triad constituted by endothelial cells, circulating LDL and MPO in close interaction, constitutes a synergic mechanism for the genesis of Mox-LDL.
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Affiliation(s)
- K Zouaoui Boudjeltia
- Laboratoire de Médecine Expérimentale (ULB 222 Unit) ISPPC Hôpital Vésale, Montigny-Le-Tilleul, Belgium.
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