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Storms N, de la Rebière G, Franck T, Mouithys Mickalad A, Sandersen C, Ceusters J, Serteyn D. Neutrophil extracellular traps and active myeloperoxidase concentrate in lamellar tissue of equids with naturally occurring laminitis. Vet Immunol Immunopathol 2024; 270:110738. [PMID: 38452577 DOI: 10.1016/j.vetimm.2024.110738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/09/2024]
Abstract
Laminitis is a pathology of the equine digit ultimately leading to a failure of the dermo-epidermal interface. Neutrophil activation is recognized as a major factor in SIRS-associated laminitis and has recently been described in induced endocrinopathic laminitis evidenced by the presence of myeloperoxidase (MPO). Neutrophil extracellular traps (NET) are released with neutrophil activation. This study aimed to investigate the presence and activity of MPO and NET in the lamellar tissue of equids presented with naturally occurring laminitis. Samples of lamellar tissue of five horses and five donkeys presented with laminitis, as well as eight control horses without laminitis, were collected. Lamellar tissue extracts were submitted to ELISA and specific immuno-extraction followed by enzymatic detection (SIEFED) assays to confirm the presence and activity of both MPO and NET. Lamellar sections were also immunohistopathologically stained for MPO and NET. Analysis of lamellar tissue extracts revealed that laminitis cases had significantly higher levels of total MPO concentration, MPO activity, and NET-bound MPO activity in comparison to control horses. Moreover, a strong correlation was identified between the activity of NET-bound MPO and the total MPO activity, which suggests that MPO activity partly originates from NET-bound MPO. Immunohistochemical staining showed that MPO and NET labelling in laminitis cases was moderate to marked, primarily in the epidermis and in inflammatory infiltrates containing neutrophils, while labelling in control horses was minimal. This article constitutes the first indication of the presence and activity of NET-bound MPO in the lamellar tissue of horses and donkeys with naturally occurring laminitis. Targeting these substances may provide new treatment possibilities for this debilitating disease.
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Affiliation(s)
- Nazaré Storms
- Department of Equine Surgery and Anesthesiology of the University of Liège, B41, Quartier vallée 2, Avenue de Cureghem 5D, Liège 4000, Belgium; Center for Oxygen Research and Development, B6, Quartier Agora, B6a, Liège 4000, Belgium.
| | - Geoffroy de la Rebière
- Department of Equine Surgery and Anesthesiology of the University of Liège, B41, Quartier vallée 2, Avenue de Cureghem 5D, Liège 4000, Belgium
| | - Thierry Franck
- Center for Oxygen Research and Development, B6, Quartier Agora, B6a, Liège 4000, Belgium
| | - Ange Mouithys Mickalad
- Center for Oxygen Research and Development, B6, Quartier Agora, B6a, Liège 4000, Belgium
| | - Charlotte Sandersen
- Department of Equine Surgery and Anesthesiology of the University of Liège, B41, Quartier vallée 2, Avenue de Cureghem 5D, Liège 4000, Belgium; Center for Oxygen Research and Development, B6, Quartier Agora, B6a, Liège 4000, Belgium
| | - Justine Ceusters
- Center for Oxygen Research and Development, B6, Quartier Agora, B6a, Liège 4000, Belgium
| | - Didier Serteyn
- Department of Equine Surgery and Anesthesiology of the University of Liège, B41, Quartier vallée 2, Avenue de Cureghem 5D, Liège 4000, Belgium; Center for Oxygen Research and Development, B6, Quartier Agora, B6a, Liège 4000, Belgium
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Adam LN, Al-Habib OAM, Oraha AY, Shekha MS. Genetic and clinical study of myeloperoxidase's association with coronary artery disease. Egypt Heart J 2024; 76:27. [PMID: 38383869 PMCID: PMC10881921 DOI: 10.1186/s43044-024-00457-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/16/2024] [Indexed: 02/23/2024] Open
Abstract
BACKGROUND Unraveling myeloperoxidase's (MPO) correlation with coronary artery disease (CAD) and genetic variations, this study seeks to enhance diagnostic precision and therapeutic strategies. RESULTS CAD patients were found to be older and more male than controls. Several clinical parameters, including glucose, total bilirubin, alkaline phosphatase, creatinine, and troponin levels, showed significant variations. Moreover, CAD patients had lower red cell distribution width (RDW%) and mean platelet volume (MPV) than controls. Serum MPO levels did not differ significantly between CAD patients and controls, and no correlation was found with other clinical parameters except for glucose, creatinine, and total bilirubin. CONCLUSIONS The data suggest that serum MPO levels are not substantially related to CAD patients, as indicated by lower MPO levels in CAD patients compared to controls. While highlighting the potential of MPV and RDW% as predictors of severe atherosclerosis in CAD. Further research is needed to validate the diagnostic and prognostic value of RDW%, MPV, and MPO levels in CAD. TRIAL REGISTRATION 15092021-9-12. Registered 15 September 2021.
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Affiliation(s)
- Lina N Adam
- Department of Biology, College of Science, University of Zakho, Duhok, Kurdistan Region, Iraq.
| | - Omar A M Al-Habib
- Department of Biology, College of Science, University of Nawroz, Duhok, Kurdistan Region, Iraq
| | - Ashur Y Oraha
- Department of Cardiothoracic and Vascular Surgery, College of Medicine, University of Duhok, Duhok, Kurdistan Region, Iraq
| | - Mudhir S Shekha
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden.
- Department of Biology, College of Science, Salahaddin University-Erbil, Erbil, Kurdistan Region, Iraq.
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Matsuno S, Itabashi M, Komatsu A, Taito K, Izawa A, Tsuchiya T, Yamanaka N, Oka M, Yumura W, Arai T, Takei T. Anti-glomerular basement membrane disease developing 3 years after the development of Sweet syndrome and 1 year after the development of anti-neutrophil cytoplasmic antibody-associated vasculitis: a case report. CEN Case Rep 2023; 12:259-264. [PMID: 36456780 PMCID: PMC10393910 DOI: 10.1007/s13730-022-00758-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/19/2022] [Indexed: 12/03/2022] Open
Abstract
A 73-year-old Japanese woman, with a history of Sweet syndrome diagnosed 3 years earlier and anti-myeloperoxidase (MPO) antibody anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis diagnosed 1 year earlier, presented with an episode of rapidly progressive glomerulonephritis (RPGN) with anti-glomerular basement membrane (GBM) disease. At the time of diagnosis of the ANCA-associated vasculitis 1 year earlier, serological testing yielded a negative result for anti-GBM antibody. However, at the present visit, serology for anti-MPO antibody was negative, while that for anti-GBM antibody was positive. This is the first report of anti-GBM disease developing sequentially after Sweet syndrome and ANCA-associated vasculitis. This case may provide clues to the potential immunological links among these three distinct conditions.
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Affiliation(s)
- Shiho Matsuno
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Mitsuyo Itabashi
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan.
| | - Akiko Komatsu
- Departments of Pathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Kenta Taito
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Ayano Izawa
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Takaaki Tsuchiya
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Noriko Yamanaka
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Masatoshi Oka
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Wako Yumura
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Tomio Arai
- Departments of Pathology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
| | - Takashi Takei
- Departments of Nephrology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, 35-2 Sakae-Cho, Itabashi-Ku, Tokyo, 173-0015, Japan
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Heshin-Bekenstein M, Baron S, Schulert G, Shusterman A, Fidel V, Ben-Shahar Y, Shukrun R, Binenbaum Y, Elhasid R. Neutrophils extracellular traps formation may serve as a biomarker for disease activity in oligoarticular juvenile idiopathic arthritis: a pilot study. Arthritis Res Ther 2023; 25:135. [PMID: 37525216 PMCID: PMC10388488 DOI: 10.1186/s13075-023-03104-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 07/04/2023] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND Juvenile idiopathic arthritis (JIA) is the most common chronic rheumatic disease in children, causing significant morbidity. Despite the dramatic improvement in treatment, many patients do not achieve complete remission, and biomarkers for subclinical disease, flares, and response to treatment are lacking. Neutrophils and neutrophil extracellular traps (NETs) play key roles in the pathogenesis of autoimmune and inflammatory conditions. In this study, we characterized neutrophil enzyme activity and NETs formation in oligoarticular and polyarticular JIA and explored their association with disease activity. METHODS Neutrophils from 6 healthy controls and 7 patients with oligoarticular and polyarticular JIA were freshly isolated at time of diagnosis and after glucocorticoid intra-articular injection. Enzymatic activity of neutrophil granular enzymes was monitored by colorimetry and PMA-activated NETs formation was assessed using fluorescent microscopy. RESULTS In this pilot and feasibility study, we revealed that NETs were significantly increased in oligoarticular JIA patients at time of diagnosis compared to healthy controls. Anti-inflammatory treatment using intra-articular steroid injection normalized NETs formation in these patients. Correlation between NETs formation and clinical Juvenile Activity Disease Activity Score-10 (cJADAS-10) was linear and significant (P = 0.007) in oligo but not in poly JIA patients. CONCLUSIONS This is the first study exploring the link of NETs formation with oligo and poly JIA activity. We demonstrated a statistically significant linear correlation between cJADAS-10 and NETs formation in oligo but not in poly JIA patients. Hence, we suggest that NETs may reflect clinical disease activity in JIA, and may serve as a putative biomarker. Further work is needed to validate these initial results and determine the dynamics of NETs formation in JIA.
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Affiliation(s)
- Merav Heshin-Bekenstein
- Pediatric Rheumatology Service, Dana Dwek Children's Hospital of Tel Aviv Medical Center, Tel Aviv, Israel.
- School of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Szilvia Baron
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Grant Schulert
- Division of Rheumatology, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Anna Shusterman
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Victoria Fidel
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Yoav Ben-Shahar
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Department of Pediatric Surgery, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Rachel Shukrun
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Yoav Binenbaum
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Ronit Elhasid
- School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel
- Department of Pediatric Hemato-Oncology, Tel Aviv Medical Center, Tel Aviv, Israel
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Huang J, Tao H, Yancey PG, Leuthner Z, May-Zhang LS, Jung JY, Zhang Y, Ding L, Amarnath V, Liu D, Collins S, Davies SS, Linton MF. Scavenging dicarbonyls with 5'-O-pentyl-pyridoxamine increases HDL net cholesterol efflux capacity and attenuates atherosclerosis and insulin resistance. Mol Metab 2022; 67:101651. [PMID: 36481344 PMCID: PMC9792904 DOI: 10.1016/j.molmet.2022.101651] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Oxidative stress contributes to the development of insulin resistance (IR) and atherosclerosis. Peroxidation of lipids produces reactive dicarbonyls such as Isolevuglandins (IsoLG) and malondialdehyde (MDA) that covalently bind plasma/cellular proteins, phospholipids, and DNA leading to altered function and toxicity. We examined whether scavenging reactive dicarbonyls with 5'-O-pentyl-pyridoxamine (PPM) protects against the development of IR and atherosclerosis in Ldlr-/- mice. METHODS Male or female Ldlr-/- mice were fed a western diet (WD) for 16 weeks and treated with PPM versus vehicle alone. Plaque extent, dicarbonyl-lysyl adducts, efferocytosis, apoptosis, macrophage inflammation, and necrotic area were measured. Plasma MDA-LDL adducts and the in vivo and in vitro effects of PPM on the ability of HDL to reduce macrophage cholesterol were measured. Blood Ly6Chi monocytes and ex vivo 5-ethynyl-2'-deoxyuridine (EdU) incorporation into bone marrow CD11b+ monocytes and CD34+ hematopoietic stem and progenitor cells (HSPC) were also examined. IR was examined by measuring fasting glucose/insulin levels and tolerance to insulin/glucose challenge. RESULTS PPM reduced the proximal aortic atherosclerosis by 48% and by 46% in female and male Ldlr-/- mice, respectively. PPM also decreased IR and hepatic fat and inflammation in male Ldlr-/- mice. Importantly, PPM decreased plasma MDA-LDL adducts and prevented the accumulation of plaque MDA- and IsoLG-lysyl adducts in Ldlr-/- mice. In addition, PPM increased the net cholesterol efflux capacity of HDL from Ldlr-/- mice and prevented both the in vitro impairment of HDL net cholesterol efflux capacity and apoAI crosslinking by MPO generated hypochlorous acid. Moreover, PPM decreased features of plaque instability including decreased proinflammatory M1-like macrophages, IL-1β expression, myeloperoxidase, apoptosis, and necrotic core. In contrast, PPM increased M2-like macrophages, Tregs, fibrous cap thickness, and efferocytosis. Furthermore, PPM reduced inflammatory monocytosis as evidenced by decreased blood Ly6Chi monocytes and proliferation of bone marrow monocytes and HSPC from Ldlr-/- mice. CONCLUSIONS PPM has pleotropic atheroprotective effects in a murine model of familial hypercholesterolemia, supporting the therapeutic potential of reactive dicarbonyl scavenging in the treatment of IR and atherosclerotic cardiovascular disease.
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Affiliation(s)
- Jiansheng Huang
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Huan Tao
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Patricia G. Yancey
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Zoe Leuthner
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Linda S. May-Zhang
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States
| | - Ju-Yang Jung
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Youmin Zhang
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Lei Ding
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Venkataraman Amarnath
- Department of Pathology, Microbiology & Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Dianxin Liu
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Sheila Collins
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States,Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, United States
| | - Sean S. Davies
- Department of Pharmacology, Vanderbilt University, Nashville, TN, United States
| | - MacRae F. Linton
- Department of Medicine, Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States,Department of Pharmacology, Vanderbilt University, Nashville, TN, United States,Corresponding author. Department of Cardiovascular Medicine, Atherosclerosis Research Unit, Vanderbilt University Medical Center, 2220 Pierce Avenue, Nashville, TN, United States.
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Nessler K, Grzybczak R, Nessler M, Zalewski J, Gajos G, Windak A. Associations between myeloperoxidase and paraoxonase-1 and type 2 diabetes in patients with ischemic heart disease. BMC Cardiovasc Disord 2022; 22:521. [PMID: 36463116 PMCID: PMC9719221 DOI: 10.1186/s12872-022-02928-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 10/31/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND The phrase "dysfunctional high-density lipoprotein" has been developed in the literature to describe the particle which loses its basic role- anti-oxidative and anti-inflammatory activity. In this porcess, the significance of enzymes- pro-oxidant myeloperoxidase (MPO) and antioxidant paraoxonase-1 (PON-1) from the perspective of HDL-C function has been noted. AIMS The objective of this study was to analyze the associations between two enzymes -MPO and PON-1 and type 2 diabetes (T2DM) in patients with ischemic heart disease (IHD). METHODS An observational cross-sectional study including 70 patients with IHD of whom 35 had also T2DM, and 35 had no T2DM. Laboratory tests (MPO, PON-1, fasting glucose, glycated hemoglobin, total cholesterol, triglycerides, high-density lipoprotein, low-density lipoprotein, and high-sensitivity C-reactive protein) were performed. RESULTS The study revealed a significant difference in the serum concentration of the enzymes between patients with IHD with and without T2DM. Our results showed increased MPO concentration levels in diabetic patients. The analysis also revealed that T2DM is independently associated with an increase in MPO levels. Simultaneously, a decrease in PON-1 levels was observed in patients with T2DM. The study also revealed that T2DM is independently associated with a decrease in PON-1 levels. CONCLUSIONS In patients with type 2 diabetes the profile of enzymes involved in high-density lipoprotein metabolism in patients with IHD is worse than in patients without T2DM. The increase in the levels of MPO, an enzyme with oxidative and atherogenic properties and on a decrease in PON-1 levels, an enzyme with antioxidant and atheroprotective properties is observed.
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Affiliation(s)
- Katarzyna Nessler
- grid.5522.00000 0001 2162 9631Department of Family Medicine, Chair of Internal Medicine and Gerontology, Jagiellonian University Medical College in Krakow, 4 Bochenska str, 31-061 Krakow, Poland
| | - Rafal Grzybczak
- grid.5522.00000 0001 2162 9631Department of Cardiac Rehabilitation, Institute of Cardiology, Jagiellonian University Medical College, 80 Pradnicka str, 31-202 Krakow, Poland
| | - Michal Nessler
- Burns and Plastic Surgery Centre of Malopolska, Rydygier Memorial Hospital, Os. Zlotej Jesieni 1, 31-826 Krakow, Poland
| | - Jarosław Zalewski
- grid.5522.00000 0001 2162 9631Department of Coronary Disease and Heart Failure, Institute of Cardiology, Jagiellonian University Medical College, John Paul II Hospital, 80 Pradnicka str, 31-202 Krakow, Poland
| | - Grzegorz Gajos
- grid.5522.00000 0001 2162 9631Department of Coronary Disease and Heart Failure, Institute of Cardiology, Jagiellonian University Medical College, John Paul II Hospital, 80 Pradnicka str, 31-202 Krakow, Poland
| | - Adam Windak
- grid.5522.00000 0001 2162 9631Department of Family Medicine, Chair of Internal Medicine and Gerontology, Jagiellonian University Medical College in Krakow, 4 Bochenska str, 31-061 Krakow, Poland
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Chen W, Tumanov S, Kong SMY, Cheng D, Michaëlsson E, Bongers A, Power C, Ayer A, Stocker R. Therapeutic inhibition of MPO stabilizes pre-existing high risk atherosclerotic plaque. Redox Biol 2022; 58:102532. [PMID: 36375379 DOI: 10.1016/j.redox.2022.102532] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/29/2022] [Accepted: 11/03/2022] [Indexed: 11/06/2022] Open
Abstract
Currently there are no established therapies to treat high-risk patients with unstable atherosclerotic lesions that are prone to rupture and can result in thrombosis, abrupt arterial occlusion, and a precipitous infarction. Rather than being stenotic, rupture-prone non-occlusive plaques are commonly enriched with inflammatory cells and have a thin fibrous cap. We reported previously that inhibition of the pro-inflammatory enzyme myeloperoxidase (MPO) with the suicide inhibitor AZM198 prevents formation of unstable plaque in the Tandem Stenosis (TS) mouse model of plaque instability. However, in our previous study AZM198 was administered to animals before unstable plaque was present and hence it did not test the significant unmet clinical need present in high-risk patients with vulnerable atherosclerosis. In the present study we therefore asked whether pharmacological inhibition of MPO with AZM198 can stabilize pre-existing unstable lesions in an interventional setting using the mouse model of plaque instability. In vivo molecular magnetic resonance imaging of arterial MPO activity using bis-5-hydroxytryptamide-DTPA-Gd and histological analyses revealed that arterial MPO activity was elevated one week after TS surgery, prior to the presence of unstable lesions observed two weeks after TS surgery. Animals with pre-existing unstable plaque were treated with AZM198 for one or five weeks. Both short- and long-term intervention effectively inhibited arterial MPO activity and increased fibrous cap thickness, indicative of a more stable plaque phenotype. Plaque stabilization was observed without AZM198 affecting the arterial content of Ly6B.2+- and CD68+-cells and MPO protein. These findings demonstrate that inhibition of arterial MPO activity converts unstable into stable atherosclerotic lesions in a preclinical model of plaque instability and highlight the potential therapeutic potency of MPO inhibition for the management of high-risk patients and the development of novel protective strategies against cardiovascular diseases.
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London D, Elhasid R, Baron S. Determination of reference intervals for neutrophil granular enzymes is affected by cell isolation techniques. J Immunol Methods 2022; 510:113346. [PMID: 36049559 DOI: 10.1016/j.jim.2022.113346] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 07/28/2022] [Accepted: 08/26/2022] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Neutrophils and their granular enzymes such as neutrophil elastase (NE) and myeloperoxidase (MPO) play important roles in inflammatory diseases, and might be utilized as biomarkers for disease severity and progression. The aim of this study was to determine reference intervals for NE and MPO activity in healthy volunteers comparing two methods of neutrophil isolation. METHODS Neutrophils were isolated using ficoll density gradient centrifugation or immunomagnetic negative selection in two separate volunteers' cohorts. Subsequently, cells were lysed and incubated with chromogens for NE and MPO activity measurements, then measured with a microplate reader at 415 or 450 nm respectively. RESULTS The enzymatic activity of NE and MPO depended on the neutrophil isolation technique. Both enzymatic activities were significantly higher (P < 0.001) after isolating neutrophils with ficoll density gradient centrifugation than using the immunomagnetic negative selection. CONCLUSIONS We demonstrated that neutrophil isolation is an important factor that influences the outcome of enzymatic activity measurements. Techniques based on immunomagnetic negative selection are favorable, specifically for investigations related to NE and MPO activity. When using NE and MPO activity measurements in clinical practice, care must be taken to interpret the data depending on the applied cell isolation technique.
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Affiliation(s)
- Devora London
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ronit Elhasid
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; Department of Pediatric Hemato-Oncology, Tel Aviv Medical Center, Tel Aviv, Israel
| | - Szilvia Baron
- Pediatric Hemato-Oncology Research Laboratory, Tel Aviv Medical Center, Tel Aviv, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Cho SY, Kim SR, Vaidya B, Kwon J, Kim D. Identification of rearing temperature-dependent host defense signaling against viral hemorrhagic septicemia virus infection. Fish Shellfish Immunol 2022; 123:257-264. [PMID: 35301114 DOI: 10.1016/j.fsi.2022.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/02/2022] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
Viral hemorrhagic septicemia virus (VHSV) infection is associated with fatal outcomes in the aquaculture production of olive flounder (Paralichthys olivaceus). Olive flounders at low and high temperatures are known to be highly susceptible and resistant to VHSV infection, respectively. To study temperature-dependent innate immune activity, 4-aminobenzoic hydrazide (4-AH), a myeloperoxidase (MPO) inhibitor, was used to treat VHSV-infected olive flounders reared at a high temperature of 20 °C (20VI). Mortality, the MPO transcription, and the proteomic expression pattern of the 20VI group were then compared with those of groups of VHSV-infected flounders reared at 15 °C (15V) and 20 °C (20V). The cumulative mortality rate of the 20VI group was increased by 35% compared with that of the untreated 20V group. The MPO transcription was decreased 5.8-fold in 20VI than in 20V group. Its expression decreased further at a lower temperature and after exposure to VHSV. Histopathological analysis revealed necrosis of splenic tissue in 20VI and 15V, but not in 20V group. Based on clustering analysis, proteins with increased expression in 15V and 20VI groups were associated with viral mRNA translation and reproduction compared with those of 20V group. Increased expression of DHX58, MX1, and UBB was detected in 15V and 20VI groups, suggesting a role in triggering innate immune response. Unfortunately, these genes failed to induce the translocation of GLUT4 to the surface membrane from the intracellular location due to decreased expression of 14-3-3 proteins (YWHAB and YWHAZ) and microtubules (TUBA1A and TUBB4B). Suppression of glucose supply led to inactivation of MPO and suppression of MHC-I and MHC-II-linked immune activity, resulting in high viral infection and spread. In conclusion, this study highlights that defective GLUT4 translocation-dependent glucose uptake increases the mortality of VHSV-infected olive flounders by inhibiting MPO activity.
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Affiliation(s)
- Se-Young Cho
- Department of Food Science and Technology, Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Seok Ryel Kim
- Department of Smart Fishery Resources Science, College of Industrial Science, Kongju National University, Yesan, 32439, Republic of Korea
| | - Bipin Vaidya
- Department of Food Science and Technology, Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Joseph Kwon
- Department of BioChemical Analysis, Korea Basic Science Institute, Daejeon, 34133, Republic of Korea.
| | - Duwoon Kim
- Department of Food Science and Technology, Foodborne Virus Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea.
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10
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Santos MBD, Carvalho Marques B, Miranda Ayusso G, Rocha Garcia MA, Chiquetto Paracatu L, Pauli I, Silva Bolzani V, Defini Andricopulo A, Farias Ximenes V, Zeraik ML, Regasini LO. Chalcones and their B-aryl analogues as myeloperoxidase inhibitors: In silico, in vitro and ex vivo investigations. Bioorg Chem 2021; 110:104773. [PMID: 33744807 DOI: 10.1016/j.bioorg.2021.104773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 01/29/2021] [Accepted: 02/22/2021] [Indexed: 12/23/2022]
Abstract
In the present study, a series of chalcones and their B-aryl analogues were prepared and evaluate as inhibitors of myeloperoxidase (MPO) chlorinating activity, using in vitro and ex vivo assays. Among these, B-thiophenyl chalcone (analogue 9) demonstrated inhibition of in vitro and ex vivo MPO chlorinating activity, exhibiting IC50 value of 0.53 and 19.2 µM, respectively. Potent ex vivo MPO inhibitors 5, 8 and 9 were not toxic to human neutrophils at 50 µM, as well as displayed weak 2,2-diphenyl-1-pycrylhydrazyl radical (DPPH•) and hypochlorous acid (HOCl) scavenger abilities. Docking simulations indicated binding mode of MPO inhibitors, evidencing hydrogen bonds between the amino group at 4'position (ring A) of chalcones with Gln91, Asp94, and Hys95 MPO residues. In this regard, the efficacy and low toxicity promoted aminochalcones and arylic analogues to the rank of hit compounds in the search for new non-steroidal anti-inflammatory compounds.
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Affiliation(s)
- Mariana Bastos Dos Santos
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Beatriz Carvalho Marques
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Gabriela Miranda Ayusso
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Mayara Aparecida Rocha Garcia
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil
| | - Luana Chiquetto Paracatu
- Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360 Bauru, SP, Brazil
| | - Ivani Pauli
- Physics Institute of São Carlos, University of São Paulo, 13563-120 São Carlos, SP, Brazil
| | - Vanderlan Silva Bolzani
- Department of Organic Chemistry, Institute of Chemistry, São Paulo State University, 14800-900 Araraquara, SP, Brazil
| | | | - Valdecir Farias Ximenes
- Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360 Bauru, SP, Brazil
| | - Maria Luiza Zeraik
- Department of Chemistry, State University of Londrina (UEL), 86051-990 Londrina, PR, Brazil.
| | - Luis Octavio Regasini
- Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), 15054-000 São José do Rio Preto, SP, Brazil.
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11
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Wu CY, Bawa KK, Ouk M, Leung N, Yu D, Lanctôt KL, Herrmann N, Pakosh M, Swardfager W. Neutrophil activation in Alzheimer's disease and mild cognitive impairment: A systematic review and meta-analysis of protein markers in blood and cerebrospinal fluid. Ageing Res Rev 2020; 62:101130. [PMID: 32712109 DOI: 10.1016/j.arr.2020.101130] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/28/2020] [Accepted: 07/20/2020] [Indexed: 12/29/2022]
Abstract
Inflammation is involved in the pathophysiology of Alzheimer's disease (AD), with multiple inflammatory processes implicated in its risk and progression. This review included original peer-reviewed studies measuring the cerebrospinal fluid or peripheral blood concentrations of protein markers specifically related to neutrophil activity in healthy controls (HC) and in patients with AD or mild cognitive impairment (MCI). A total of 35 studies (NHC = 3095, NAD = 2596, NMCI = 1203) were included. Random-effects meta-analyses were used to estimate between-groups standardized mean differences (SMD) and 95 % confidence intervals. In blood, concentrations of myeloperoxidase (MPO; NAD/NHC = 271/209, SMD = 0.41 [0.20, 0.62]; I2 = 15.7 %) and neutrophil gelatinase associated lipocalin (NGAL; NAD/NHC = 273/185, SMD = 0.30 [0.11, 0.49]; I2 < 0.005 %) were significantly higher in AD relative to HC. Peripheral blood concentrations of NGAL were also higher in MCI compared to HC (NMCI/NHC = 489/145, SMD = 0.39 [0.11, 0.67]; I2 = 38.6 %). None of the protein markers exhibited a significant difference between HC, MCI, or AD groups in the cerebrospinal fluid. The evidence suggests that peripheral neutrophil activation, as indicated by blood concentrations of NGAL and MPO, may be a pathological feature of cognitive impairment due to AD, evident at stages of MCI and AD dementia.
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Affiliation(s)
- Che-Yuan Wu
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada; Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada
| | - Kritleen K Bawa
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada; Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada
| | - Michael Ouk
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada; Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada
| | - Nathan Leung
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada
| | - Di Yu
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada; Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada
| | - Krista L Lanctôt
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada; Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada; Department of Psychiatry, Faculty of Medicine, University of Toronto, 250 College Street, 8th Floor, Toronto, ON, M5T 1R8, Canada; KITE UHN Toronto Rehabilitation Institute, 347 Rumsey Rd, East York, ON, M4G 2V6, Canada; Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada
| | - Nathan Herrmann
- Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada; Department of Psychiatry, Faculty of Medicine, University of Toronto, 250 College Street, 8th Floor, Toronto, ON, M5T 1R8, Canada
| | - Maureen Pakosh
- KITE UHN Toronto Rehabilitation Institute, 347 Rumsey Rd, East York, ON, M4G 2V6, Canada
| | - Walter Swardfager
- Department of Pharmacology & Toxicology, University of Toronto, 1 King's College Circle, Toronto, ON, M5S 1A8, Canada; Hurvitz Brain Sciences Program, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada; KITE UHN Toronto Rehabilitation Institute, 347 Rumsey Rd, East York, ON, M4G 2V6, Canada; Heart and Stroke Foundation Canadian Partnership for Stroke Recovery, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, ON, M4N 3M5, Canada.
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12
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Jeffs LS, Peh CA, Nelson A, Tan PG, Davey E, Chappell K, Perkins GB, Hurtado PR. IgM ANCA in healthy individuals and in patients with ANCA-associated vasculitis. Immunol Res 2020; 67:325-336. [PMID: 31372816 DOI: 10.1007/s12026-019-09091-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Low levels of IgM auto-antibodies have been reported in health and disease. IgM anti-neutrophil cytoplasmic antibodies (ANCA) have been reported in patients with ANCA-associated vasculitis (AAV). We sought to investigate if healthy individuals may have IgM ANCA in their sera. The first aim of the study was to determine whether IgM ANCA was present in healthy individuals and in patients with ANCA-associated vasculitis. The second aim was to determine what happens to IgM ANCA levels over time. The third aim was to determine whether bacterial infections affected IgM ANCA levels in non-AAV patients. Sera from healthy individuals and patients with AAV were tested for IgM ANCA by immunofluorescence on fixed neutrophils, immunoprecipitation, Western blot and ELISA. Peripheral blood mononuclear cells were isolated and tested by ELISpot for circulating IgM ANCA B cells. To determine whether infection affected IgM ANCA levels, we studied non-AAV patients with bacterial endocarditis or Staphylococcus aureus bacteraemia and measured IgM ANCA levels over time. IgM ANCA is detectable in both healthy individuals and patients with AAV and the titres decreased with increasing age. Circulating IgM ANCA B cells were identified by ELISpot. In the presence of infection, we could not find a significant change in IgM ANCA levels. We report the presence of low-level specific IgM ANCA in the sera of healthy individuals and in patients with ANCA-associated vasculitis. Bacterial infection did not affect the level of IgM ANCA in this small study.
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Affiliation(s)
- L S Jeffs
- Department of Nephrology, Royal Hobart Hospital, Liverpool Street, Hobart, Tasmania, 7000, Australia.
| | - C A Peh
- Department of Renal Medicine, Royal Adelaide Hospital, Adelaide, Australia.,Faculty of Medical and Health Sciences, University of Adelaide, Adelaide, Australia
| | - A Nelson
- Faculty of Medical and Health Sciences, University of Adelaide, Adelaide, Australia.,Department of Cardiology, Royal Adelaide Hospital, Adelaide, Australia
| | - P G Tan
- Department of Nephrology, Royal Hobart Hospital, Liverpool Street, Hobart, Tasmania, 7000, Australia
| | - E Davey
- Department of Nephrology, Royal Hobart Hospital, Liverpool Street, Hobart, Tasmania, 7000, Australia
| | - K Chappell
- Menzies Institute for Medical Research, Department of Statistics, University of Tasmania, Liverpool Street, Hobart, Tasmania, 7000, Australia
| | - G B Perkins
- Faculty of Medical and Health Sciences, University of Adelaide, Adelaide, Australia
| | - P R Hurtado
- Department of Renal Medicine, Royal Adelaide Hospital, Adelaide, Australia.,Faculty of Medical and Health Sciences, University of Adelaide, Adelaide, Australia
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13
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Mahmoudi T, Abdolmohammadi K, Bashiri H, Mohammadi M, Rezaie MJ, Fathi F, Fakhari S, Rezaee MA, Jalili A, Rahmani MR, Tayebi L. Hydrogen Peroxide Preconditioning Promotes Protective Effects of Umbilical Cord Vein Mesenchymal Stem Cells in Experimental Pulmonary Fibrosis. Adv Pharm Bull 2020; 10:72-80. [PMID: 32002364 PMCID: PMC6983995 DOI: 10.15171/apb.2020.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/27/2019] [Accepted: 07/02/2019] [Indexed: 12/15/2022] Open
Abstract
Purpose: Idiopathic pulmonary fibrosis (IPF) is a progressive lung disorder with few available treatments. Mesenchymal stem cell therapy (MSCT), an innovative approach, has high therapeutic potential when used to treat IPF. According to recent data, preconditioning of MSCs can improve their therapeutic effects. Our research focuses on investigating the anti-inflammatory and antifibrotic effects of H2 O2 -preconditioned MSCs (p-MSCs) on mice with bleomycin-induced pulmonary fibrosis (PF). Methods: Eight-week-old male C57BL/6 mice were induced with PF by intratracheal (IT) instillation of bleomycin (4 U/kg). Human umbilical cord vein-derived MSCs (hUCV-MSCs) were isolated and exposed to a sub-lethal concentration (15 μM for 24 h) of H2 O2 in vitro. One week following the injection of bleomycin, 2×105 MSCs or p-MSCs were injected (IT) into the experimental PF. The survival rate and weight of mice were recorded, and 14 days after MSCs injection, all mice were sacrificed. Lung tissue was removed from these mice to examine the myeloperoxidase (MPO) activity, histopathological changes (hematoxylin-eosin and Masson's trichrome) and expression of transforming growth factor beta 1 (TGF-β1) and alpha-smooth muscle actin (α-SMA) through immunohistochemistry (IHC) staining. Results: Compared to the PF+MSC group, p-MSCs transplantation results in significantly decreased connective tissue (P<0.05) and collagen deposition. Additionally, it is determined that lung tissue in the PF+pMSC group has increased alveolar space (P<0.05) and diminished expression of TGF-β1 and α-SMA. Conclusion: The results demonstrate that MSCT using p-MSCs decreases inflammatory and fibrotic factors in bleomycin-induced PF, while also able to increase the therapeutic potency of MSCT in IPF.
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Affiliation(s)
- Tayebeh Mahmoudi
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Kamal Abdolmohammadi
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Bashiri
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Medical Laboratory Sciences, Faculty of Paramedical, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mehdi Mohammadi
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Jafar Rezaie
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Fardin Fathi
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Shohreh Fakhari
- Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mohammad Ali Rezaee
- Department of Medical Laboratory Sciences, Faculty of Paramedical, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Ali Jalili
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Cancer and Immunology Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mohammad Reza Rahmani
- Department of Immunology, Faculty of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran
- Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI, 53233, USA
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14
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Correa S, Pena-Esparragoza JK, Scovner KM, Waikar SS, Mc Causland FR. Myeloperoxidase and the Risk of CKD Progression, Cardiovascular Disease, and Death in the Chronic Renal Insufficiency Cohort (CRIC) Study. Am J Kidney Dis 2019; 76:32-41. [PMID: 31864821 DOI: 10.1053/j.ajkd.2019.09.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 09/07/2019] [Indexed: 12/28/2022]
Abstract
BACKGROUND Myeloperoxidase (MPO) catalyzes the formation of reactive nitrogen species and levels are elevated in patients with chronic kidney disease (CKD). Although increased oxidative stress and inflammation are associated with progression of CKD and cardiovascular disease (CVD), relationships between MPO concentration, CKD progression, CVD, and death remain unclear. STUDY DESIGN Prospective cohort. SETTING & PARTICIPANTS 3,872 participants from the Chronic Renal Insufficiency Cohort (CRIC) who had MPO measured at baseline. EXPOSURE Baseline MPO concentration. OUTCOMES CKD progression (kidney transplantation, dialysis initiation, or 50% decline in baseline estimated glomerular filtration rate [eGFR] and eGFR≤15mL/min/1.73m2), CVD (heart failure, myocardial infarction, or stroke), and death. ANALYTICAL APPROACH Cox proportional hazards models. RESULTS In adjusted analyses, higher MPO level (per 1-SD increase in log-transformed MPO) was associated with 10% higher risk for CKD progression (adjusted HR, 1.10; 95% CI, 1.01-1.19; P=0.03), 12% higher risk for CVD (adjusted HR, 1.12; 95% CI, 1.03-1.22; P<0.01), and 13% increased risk for death (adjusted HR, 1.13; 95% CI, 1.04-1.22; P<0.01). There was evidence for effect modification of the association of MPO level with CKD progression by baseline eGFR (P interaction=0.02), but not for CVD (P interaction=0.2) or death (P interaction=0.1). In stratified analyses, MPO level (per 1-SD increase in log-transformed MPO) was associated with greater risk for CKD progression among participants with eGFR>45mL/min/1.73m2 (adjusted HR, 1.23; 95% CI, 1.03-1.46; P=0.02) compared with those with eGFR≤45mL/min/1.73m2 (adjusted HR, 1.10; 95% CI, 1.02-1.20; P=0.02). The association of MPO level with CVD and death was no longer significant after adjustment for cardiac biomarkers. LIMITATIONS Potential residual confounding, lack of repeated measurements of MPO. CONCLUSIONS Higher MPO level was associated with increased risk for CKD progression, but not with CVD and death in patients with CKD from CRIC. Whether therapies aimed at reducing MPO activity can result in improved clinical outcomes is yet to be determined.
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Affiliation(s)
- Simon Correa
- Division of Renal Medicine, Brigham and Women's Hospital, Boston, MA; Harvard Medical School, Boston, MA.
| | | | - Katherine M Scovner
- Division of Renal Medicine, Brigham and Women's Hospital, Boston, MA; Harvard Medical School, Boston, MA
| | - Sushrut S Waikar
- Division of Renal Medicine, Brigham and Women's Hospital, Boston, MA; Harvard Medical School, Boston, MA; Renal Section, Department of Medicine, Boston University Medical Center, Boston, MA
| | - Finnian R Mc Causland
- Division of Renal Medicine, Brigham and Women's Hospital, Boston, MA; Harvard Medical School, Boston, MA
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15
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Moxey J, Huq M, Proudman S, Sahhar J, Ngian GS, Walker J, Strickland G, Wilson M, Ross L, Major G, Roddy J, Stevens W, Nikpour M. Significance of anti-neutrophil cytoplasmic antibodies in systemic sclerosis. Arthritis Res Ther 2019; 21:57. [PMID: 30764870 PMCID: PMC6376778 DOI: 10.1186/s13075-019-1839-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 02/01/2019] [Indexed: 11/26/2022] Open
Abstract
Background Up to 12% of patients with systemic sclerosis (SSc) have anti-neutrophil cytoplasmic antibodies (ANCA). However, the majority of these patients do not manifest ANCA-associated vasculitis (AAV) and the significance of ANCA in these patients is unclear. The aim of this study is to determine the prevalence of ANCA in a well-characterised SSc cohort and to examine the association between ANCA and SSc clinical characteristics, other autoantibodies, treatments and mortality. Methods Clinical data were obtained from 5 centres in the Australian Scleroderma Cohort Study (ASCS). ANCA positive was defined as the presence of any one or combination of cytoplasmic ANCA (c-ANCA), perinuclear ANCA (p-ANCA), atypical ANCA, anti-myeloperoxidase (anti-MPO) or anti-proteinase-3 (anti-PR3). Associations of demographic and clinical features with ANCA were investigated by logistic or linear regression. Survival analysis was performed using Kaplan-Meyer curves and Cox regression models. Results Of 1303 patients, 116 (8.9%) were ANCA positive. Anti-PR3 was more common than anti-MPO (13.8% and 11.2% of ANCA-positive patients, respectively). Only 3 ANCA-positive patients had AAV. Anti-Scl-70 was more common in ANCA positive vs ANCA negative (25% vs 12.8%, p < 0.001), anti-MPO positive vs anti-MPO negative (38.5% vs 13.6%, p = 0.006) and anti-PR3 positive vs anti-PR3 negative patients (44.4% vs 13.4%, p < 0.001). A higher prevalence of interstitial lung disease (ILD) was found in the ANCA positive (44.8% vs 21.8%, p < 0.001) and the anti-PR3 positive groups (50.0% vs 23.4%, p = 0.009). In multivariable analysis, ANCA-positive status remained associated with ILD after adjusting for anti-Scl-70 antibodies. Pulmonary embolism (PE) was more common in ANCA-positive patients (8.6% vs 3.0%, p = 0.002) and anti-PR3-positive patients (16.7% vs 3.3%, p = 0.022). ANCA-positive status remained associated with PE in a multivariable analysis adjusting for anti-phospholipid antibodies. Kaplan-Meier analysis revealed increased mortality in ANCA-positive patients (p = 0.006). In Cox regression analysis, ANCA was associated with increased mortality, after adjusting for age and sex. Conclusions ANCA is associated with increased prevalence of ILD and PE in SSc. ANCA should be tested in SSc, as it identifies individuals with worse prognosis who require close monitoring for adverse outcomes.
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Affiliation(s)
- Jayne Moxey
- The University of Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia.,St. Vincent's Hospital Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia
| | - Molla Huq
- The University of Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia
| | - Susanna Proudman
- University of Adelaide, Adelaide, South Australia, Australia.,Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - Joanne Sahhar
- Monash Health, Melbourne, Victoria, Australia.,Monash University, Melbourne, Victoria, Australia
| | - Gene-Siew Ngian
- Monash Health, Melbourne, Victoria, Australia.,Monash University, Melbourne, Victoria, Australia
| | - Jenny Walker
- Flinders Medical Centre, Adelaide, South Australia, Australia
| | | | - Michelle Wilson
- St. Vincent's Hospital Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia
| | - Laura Ross
- The University of Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia.,St. Vincent's Hospital Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia
| | - Gabor Major
- Royal Newcastle Centre John Hunter Hospital, Newcastle, New South Wales, Australia.,University of Newcastle, Newcastle, New South Wales, Australia
| | - Janet Roddy
- Fiona Stanley Hospital, Perth, Western Australia, Australia
| | - Wendy Stevens
- St. Vincent's Hospital Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia
| | - Mandana Nikpour
- The University of Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia. .,St. Vincent's Hospital Melbourne, 41 Victoria Parade Fitzroy, Melbourne, Victoria, 3065, Australia.
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16
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Coculescu BI, Dincă GV, Bălăeţ C, Manole G, Bălăeţ M, Stocheci CM. Myeloperoxidase, a possible biomarker for the early diagnosis of cardiac diastolic dysfunction with preserved ejection fraction. J Enzyme Inhib Med Chem 2018; 33:1292-1298. [PMID: 30165747 PMCID: PMC6127850 DOI: 10.1080/14756366.2018.1499626] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 11/03/2022] Open
Abstract
The current study was conducted on a sample of 91 patients diagnosed with diastolic dysfunction (DD) with preserved systolic function caused by a painful chronic ischaemic cardiopathy - angina pectoris stable at the effort. The diagnosis was established following anamnesis, electrocardiogram, and echocardiography. Myeloperoxidase (MPO) serum levels were assessed in all patients and then these values were correlated with some of the echocardiography parameters that proved the mentioned diagnosis. In conclusion, the execution of this investigation triad (electrocardiogram, echocardiography, and MPO) allows: Stratifying the patients depending on the disease risk by early detecting of any possible DD with preserved systolic function. The use of the MPO increased circulating levels as a biomarker for diagnosis and risk due to the statistically significant correlation between those and the results of the other two aforementioned paraclinical investigation.
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Affiliation(s)
- Bogdan Ioan Coculescu
- Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania
- Center for Military Medical Scientific Research, Bucharest, Romania
- Faculty of General Nursing, Bioterra University, Bucharest, Romania
| | | | - Constantin Bălăeţ
- Faculty of General Nursing, Bioterra University, Bucharest, Romania
- Lil Med Clinic, Bucharest, Romania
| | - Gheorghe Manole
- Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania
- Clinical Hospital Colentina, Bucharest, Romania
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Harris C, Marin J, Beaulieu MC. Rituximab induction therapy for de novo ANCA associated vasculitis in pregnancy: a case report. BMC Nephrol 2018; 19:152. [PMID: 29954345 PMCID: PMC6022350 DOI: 10.1186/s12882-018-0949-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 06/17/2018] [Indexed: 12/16/2022] Open
Abstract
Background The diagnosis of antineutrophil cytoplasmic antibody (ANCA) associated vasculitis (AAV) is rare in pregnancy but potentially life threatening. There are no randomized controlled trials to guide the management of AAV in pregnancy and fetal safety data remains limited. Rituximab administration, a treatment for AAV, has been reported in pregnant women with reassuring fetal outcomes in the oncology and rheumatology literature; however, no published reports describe its use in AAV. Case presentation We present a case of de novo myeloperoxidase positive (MPO) AAV diagnosed at 22 weeks gestation. Clinical presentation included elevated serum creatinine at 177 μmol/L, hematuria and nephrotic range proteinuria along with high-titre MPO. Diagnosis was confirmed by renal biopsy. Patient was treated with methylprednisolone IV followed by oral prednisone 70 mg daily and Rituximab 650 mg IV weekly for four weeks followed by azathioprine maintenance therapy and prednisone taper. Delivery occurred at 29 weeks gestation via cesarean section for maternal neurologic symptoms concerning for preeclampsia. Maternal and fetal CD + 19 cells were depleted at time of delivery with associated fetal lymphopenia in the absence of infection or other complications related to Rituximab use. The patient experienced a reduction in proteinuria and inflammatory markers following Rituximab therapy; however, serum creatinine increased to 375 μmol/L by 11 weeks post-partum. Conclusion We report the first use, to our knowledge, of Rituximab with corticosteroids for induction therapy of AAV in pregnancy.
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Affiliation(s)
- Claire Harris
- Division of Nephrology, University of British Columbia, Vancouver, BC, Canada
| | - Judith Marin
- St. Paul's Hospital, 1081 Burrard St. Vancouver BC, Vancouver, Canada
| | - Monica C Beaulieu
- Division of Nephrology, University of British Columbia, Vancouver, BC, Canada. .,St. Paul's Hospital, 1081 Burrard St. Vancouver BC, Vancouver, Canada. .,BC Provincial Renal Agency, Vancouver, BC, Canada.
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Ahuja A, Tyagi S, Seth T, Pati HP, Gahlot G, Tripathi P, Somasundaram V, Saxena R. Comparison of Immunohistochemistry, Cytochemistry, and Flow Cytometry in AML for Myeloperoxidase Detection. Indian J Hematol Blood Transfus 2017; 34:233-239. [PMID: 29622864 DOI: 10.1007/s12288-017-0849-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 07/08/2017] [Indexed: 11/27/2022] Open
Abstract
Acute Myeloid Leukemia (AML) as per World Health Organization (WHO 2008) classification is on the basis of the antigenic characterization, enzymes restriction in the neoplastic myeloid cells and the specific translocations/mutations. AML can be assessed and differentiated by flowcytometry (FCM)/immunohistochemistry (IHC)/cytochemistry techniques. Myeloperoxidase (MPO) is an unequivocal marker to differentiate AML from the acute lymphoblastic leukemia. Despite FCM popularity, it has its limitations, in form of 'dry-tap', cost, and inability of being performed by retrospective analysis. IHC, though an old technique has overcome these disadvantages of FCM. Cytochemistry, on the other hand has its own advantages in being cost-effective; technically easy to do while its disadvantages are its inability to be carried out in the old samples, 'dry-tap' conditions in aleukemic leukemia. There has been non-uniformity in the literature among these techniques especially concerning their sensitivity for MPO. A prospective study was done at All India Institute of Medical Sciences New Delhi from 01 July 2014 to 30 Nov 2015 to include 120 diagnosed acute myeloid leukemia cases. Myeloperoxidase stain was done by cytochemistry, immunohistochemistry and flow cytometry and results were compared. There were 28 cases which showed discrepancies. Out of these 28 cases immunohistochemistry showed positivity in majority (22 cases) followed by flow cytometry (14 cases). Therefore it is important to employ more than one technique and IHC must be included for detection of MPO in all suspected cases of AML especially when negative with FCM .
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Affiliation(s)
- Ankur Ahuja
- 1Department of Lab Sciences and Molecular Medicine, Army Hospital (Research and Referral), New Delhi, India
| | - Seema Tyagi
- 2Department of Haematology, All India Institute of Medical Sciences, New Delhi, India
| | - Tulika Seth
- 2Department of Haematology, All India Institute of Medical Sciences, New Delhi, India
| | - Hara Prasad Pati
- 2Department of Haematology, All India Institute of Medical Sciences, New Delhi, India
| | - Gps Gahlot
- 1Department of Lab Sciences and Molecular Medicine, Army Hospital (Research and Referral), New Delhi, India
| | - Preeti Tripathi
- 2Department of Haematology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Renu Saxena
- 2Department of Haematology, All India Institute of Medical Sciences, New Delhi, India
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Agarwal A, Hegde A, Yadav C, Ahmad A, Manjrekar PA, Srikantiah RM. Assessment of oxidative stress and inflammation in prediabetes-A hospital based cross-sectional study. Diabetes Metab Syndr 2016; 10:S123-S126. [PMID: 27016886 DOI: 10.1016/j.dsx.2016.03.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 03/05/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND AIM Prediabetes is associated with dysglycemia, obesity, inflammation and endothelial dysfunction, contributing towards the pathogenesis of cardiovascular diseases rendering them vulnerable for the same. The current study intended to explore the risk of cardiovascular disease (CVD) related with prediabetes by assessing oxidative stress and inflammation using serum interleukin-6 (IL-6), myeloperoxidase (MPO) and urine microalbumin (MA) and their correlation with fasting plasma glucose (FPG) and physical measurements. MATERIALS AND METHODS Based on FPG values, 80 subjects were grouped into prediabetes and healthy controls. IL-6 and MPO were estimated in serum sample whereas MA was estimated in random urine sample. RESULTS Prediabetes group had significantly increased (p<0.05) mean anthropometric measurements and IL-6, MPO and MA as compared to healthy controls. MPO had significant correlation with FPG (r-0.388) in the prediabetes group. IL-6 and MPO showed a positive correlation with body mass index (BMI (r-0.339, r-0.327)), waist circumference (WC (r-484, r-0.493)) and waist-to-hip ratio (WHR (r-0.430, r-0.493)) while MA did not correlate with FPG and anthropometric measurements. CONCLUSION This study suggests that prediabetes is associated with central adiposity, inflammation and oxidative stress predisposing them to an increased risk for CVD.
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Affiliation(s)
- Ashish Agarwal
- Department of Biochemistry, Kasturba Medical College, Manipal University, ,Mangalore 575004, Karnataka, India
| | - Anupama Hegde
- Department of Biochemistry, Kasturba Medical College, Manipal University, ,Mangalore 575004, Karnataka, India.
| | - Charu Yadav
- Department of Biochemistry, Kasturba Medical College, Manipal University, ,Mangalore 575004, Karnataka, India
| | - Afzal Ahmad
- Department of Biochemistry, Kasturba Medical College, Manipal University, ,Mangalore 575004, Karnataka, India
| | - Poornima A Manjrekar
- Department of Biochemistry, Kasturba Medical College, Manipal University, ,Mangalore 575004, Karnataka, India
| | - Rukmini M Srikantiah
- Department of Biochemistry, Kasturba Medical College, Manipal University, ,Mangalore 575004, Karnataka, India
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Vianello E, Dozio E, Rigolini R, Marrocco-Trischitta MM, Tacchini L, Trimarchi S, Corsi Romanelli MM. Acute phase of aortic dissection: a pilot study on CD40L, MPO, and MMP-1, -2, 9 and TIMP-1 circulating levels in elderly patients. Immun Ageing 2016; 13:9. [PMID: 27006681 PMCID: PMC4802618 DOI: 10.1186/s12979-016-0063-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/14/2016] [Indexed: 12/25/2022]
Abstract
Background Acute aortic dissection (AAD) is an event which may be rapidly fatal without early diagnosis and treatment. Aging is one of the main risk factors that could leading to AAD. To date, no specific biomarkers are available to increase the speed of diagnosis. CD40 ligand (CD40L), myeloperoxidase (MPO), matrix metalloproteinase (MMP)-1, -2, -9 and metallopeptidase tissue inhibitor 1 (TIMP-1) are biologically related molecules which integrate inflammation, tissue injury and remodeling, all events associated to AAD. Our is a pilot study to evaluate whether circulating levels of these molecules may be used as potential biomarkers in timely diagnosis of AAD. Results Within 24 h of symptom onset, circulating CD40L, MPO, MMP-1,-2,-9 and TIMP-1 were quantified by enzyme-linked immunosorbent assays in 22 patients (40–86 years of age) with AAD of ascending aorta (type A according to Stanford classification) and 11 patients with AAD of descending aorta (type B). 30 healthy individuals age matched were used as control group compared to controls, both type A and B AAD patients had higher CD40L (p < 0.001) and MPO (p < 0.01) levels. MMP-1 was higher in the overall AAD group (p < 0.01). After Stanford classification, type A group had increased level compared to both control and type B (p < 0.01 and p < 0.05, respectively). TIMP-1 was higher in both A and B groups compared to controls (p < 0.001). No differences were observed in MMP-2 and MMP-9 levels. Conclusions The simultaneous evaluation of CD40L, MPO and MMP-1 and TIMP-1, which may contribute to structural changes in aortic tissue in AAD patients, seems to be a novel promising diagnostic panel.
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Affiliation(s)
- E Vianello
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133 Milan, Italy
| | - E Dozio
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133 Milan, Italy
| | - R Rigolini
- Laboratory Medicine Operative Unit-1, Clinical Pathology, I.R.C.C.S. Policlinico, San Donato Milanese Milan, Italy
| | - M M Marrocco-Trischitta
- Thoracic Aortic Research Center, I.R.C.C.S. Policlinico San Donato, San Donato Milanese Milan, Italy
| | - L Tacchini
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133 Milan, Italy
| | - S Trimarchi
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133 Milan, Italy ; Thoracic Aortic Research Center, I.R.C.C.S. Policlinico San Donato, San Donato Milanese Milan, Italy
| | - M M Corsi Romanelli
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, Via Luigi Mangiagalli 31, 20133 Milan, Italy ; Laboratory Medicine Operative Unit-1, Clinical Pathology, I.R.C.C.S. Policlinico, San Donato Milanese Milan, Italy
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21
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Dickerhof N, Schindler L, Bernhagen J, Kettle AJ, Hampton MB. Macrophage migration inhibitory factor (MIF) is rendered enzymatically inactive by myeloperoxidase-derived oxidants but retains its immunomodulatory function. Free Radic Biol Med 2015; 89:498-511. [PMID: 26453918 DOI: 10.1016/j.freeradbiomed.2015.09.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/23/2015] [Accepted: 09/24/2015] [Indexed: 11/24/2022]
Abstract
Macrophage migration inhibitory factor (MIF) is an important player in the regulation of the inflammatory response. Elevated plasma MIF is found in sepsis, arthritis, cystic fibrosis and atherosclerosis. Immunomodulatory activities of MIF include the ability to promote survival and recruitment of inflammatory cells and to amplify pro-inflammatory cytokine production. MIF has an unusual nucleophilic N-terminal proline with catalytic tautomerase activity. It remains unclear whether tautomerase activity is required for MIF function, but small molecules that inhibit tautomerase activity also inhibit the pro-inflammatory activities of MIF. A prominent feature of the acute inflammatory response is neutrophil activation and production of reactive oxygen species, including myeloperoxidase (MPO)-derived hypochlorous acid and hypothiocyanous acid. We hypothesized that MPO-derived oxidants would oxidize the N-terminal proline of MIF and alter its biological activity. MIF was exposed to hypochlorous acid and hypothiocyanous acid and the oxidative modifications on MIF were examined by LC-MS/MS. Imine formation and carbamylation was observed on the N-terminal proline in response to MPO-dependent generation of hypochlorous and hypothiocyanous acid, respectively. These modifications led to a complete loss of tautomerase activity. However, modified MIF still increased CXCL-8/IL-8 production by peripheral blood mononuclear cells (PBMCs) and blocked neutrophil apoptosis, indicating that tautomerase activity is not essential for these biological functions. Pre-treatment of MIF with hypochlorous acid protected the protein from covalent modification by the MIF inhibitor 4-iodo-6-phenylpyrimidine (4-IPP). Therefore, oxidant generation at inflammatory sites may protect MIF from inactivation by more disruptive electrophiles, including drugs designed to target the tautomerase activity of MIF.
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Affiliation(s)
- Nina Dickerhof
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand.
| | - Lisa Schindler
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany
| | - Jürgen Bernhagen
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany
| | - Anthony J Kettle
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
| | - Mark B Hampton
- Centre for Free Radical Research, Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
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Kanodia K, Vanikar A, Patel R, Suthar K, Nigam L, Kute V, Trivedi H. Membranous Nephropathy With MPO-ANCA-Associated Crescentic GN. Nephrourol Mon 2015; 6:e20701. [PMID: 25738112 PMCID: PMC4330666 DOI: 10.5812/numonthly.20701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 06/16/2014] [Accepted: 06/26/2014] [Indexed: 11/16/2022] Open
Abstract
Introduction: Antineutrophil cytoplasmic antibodies (ANCA)-associated glomerulonephritis (GN) is characterized by necrotizing and crescentic GN with paucity of immunoglobulin (Ig) and complement deposition, which is also known as pauci-immune crescentic GN. Membranous nephropathy (MN) is characterized by the formation of subepithelial immune deposit with resultant changes in glomerular basement membrane (GBM), most notably spike formation. Case Presentation: A 48-year-old man presented with marked proteinuria, hypoalbuminemia, and renal dysfunction with positive results for myeloperoxidase (MPO) and ANCA. Renal biopsy revealed crescents and thick GBM with subepithelial spikes along with IgG deposition on immunofluorescent staining. The condition was diagnosed as MN with MPO-ANCA-associated crescentic GN. He was treated with intravenous methylprednisolone and cyclophosphamide. After one-month follow-up, antibody level and renal function did not improve. Conclusions: Coexistence of MN with MPO-ANCA crescentic GN is very rare and should be managed aggressively.
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Affiliation(s)
- Kamal Kanodia
- Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedaba, India
- Corresponding author: Kamal Kanodia, Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedabad, India. Tel: +91-7922687162; +91-7922687000, Fax: +91-7922685454, E-mail:
| | - Aruna Vanikar
- Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedaba, India
| | - Rashmi Patel
- Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedaba, India
| | - Kamlesh Suthar
- Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedaba, India
| | - Lovelesh Nigam
- Department of Pathology, Laboratory Medicine, Transfusion Services and Immunohematology, G.R. Doshi and K.M. Mehta Institute of Kidney Diseases and Research Centre and Dr. H.L. Trivedi Institute of Transplantation Sciences, Civil Hospital Campus, Ahmedaba, India
| | - Vivek Kute
- Department of Nephrology and Transplantation Medicine, Ahmedabad, India
| | - Hargovind Trivedi
- Department of Nephrology and Transplantation Medicine, Ahmedabad, India
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da Silva CM, Vilaça Belo A, Passos Andrade S, Peixoto Campos P, Cristina França Ferreira M, Lopes da Silva-Filho A, Mendonça Carneiro M. Identification of local angiogenic and inflammatory markers in the menstrual blood of women with endometriosis. Biomed Pharmacother 2014; 68:899-904. [PMID: 25218120 DOI: 10.1016/j.biopha.2014.08.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 08/04/2014] [Indexed: 12/19/2022] Open
Abstract
The aim of this study was to evaluate the presence of myeloperoxidase (MPO), N-acetyl-β-D-glucosaminidase (NAG), tumor necrosis factor alpha (TNF-α) and vascular endothelial growth factor (VEGF) in peripheral and menstrual blood in women with (n=10) and without (n=7) endometriosis. NAG and MPO activities were evaluated by enzymatic methods, whereas TNF-α and VEGF by immunoassay. No significant differences were found for these markers, neither in menstrual nor in peripheral blood between groups. Menstrual blood NAG (P=0.039) and MPO (P=0.0117) activities in the endometriosis group were significantly higher than in peripheral blood. NAG and MPO presented positive linear correlation in peripheral (P=0.07; r=0.641) and menstrual blood (P=0.01; r=0.603). These findings point to the existence of an increased local inflammatory activity in women with endometriosis.
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Affiliation(s)
- Cláudia Maria da Silva
- Department of Obstetrics and Gynecology, School of Medicine, Federal University of Minas Gerais, Avenida Professor Alfredo Balena, 190, Santa Efigênia, Belo Horizonte, Minas Gerais, Brazil
| | - Andrezza Vilaça Belo
- Department of Obstetrics and Gynecology, School of Medicine, Federal University of Minas Gerais, Avenida Professor Alfredo Balena, 190, Santa Efigênia, Belo Horizonte, Minas Gerais, Brazil
| | - Sílvia Passos Andrade
- Department of Physiology and Biophysics, Federal University of Minas, Gerais (UFMG), Belo Horizonte, Brazil
| | - Paula Peixoto Campos
- Department of Physiology and Biophysics, Federal University of Minas, Gerais (UFMG), Belo Horizonte, Brazil
| | - Márcia Cristina França Ferreira
- Department of Obstetrics and Gynecology, School of Medicine, Federal University of Minas Gerais, Avenida Professor Alfredo Balena, 190, Santa Efigênia, Belo Horizonte, Minas Gerais, Brazil
| | - Agnaldo Lopes da Silva-Filho
- Department of Obstetrics and Gynecology, School of Medicine, Federal University of Minas Gerais, Avenida Professor Alfredo Balena, 190, Santa Efigênia, Belo Horizonte, Minas Gerais, Brazil
| | - Márcia Mendonça Carneiro
- Department of Obstetrics and Gynecology, School of Medicine, Federal University of Minas Gerais, Avenida Professor Alfredo Balena, 190, Santa Efigênia, Belo Horizonte, Minas Gerais, Brazil.
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Gomes MM, Coimbra JB, Clara RO, Dörr FA, Moreno ACR, Chagas JR, Tufik S, Pinto E, Catalani LH, Campa A. Biosynthesis of N,N-dimethyltryptamine (DMT) in a melanoma cell line and its metabolization by peroxidases. Biochem Pharmacol 2014; 88:393-401. [PMID: 24508833 DOI: 10.1016/j.bcp.2014.01.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 01/23/2014] [Accepted: 01/24/2014] [Indexed: 01/19/2023]
Abstract
Tryptophan (TRP) is essential for many physiological processes, and its metabolism changes in some diseases such as infection and cancer. The most studied aspects of TRP metabolism are the kynurenine and serotonin pathways. A minor metabolic route, tryptamine and N,N-dimethyltryptamine (DMT) biosynthesis, has received far less attention, probably because of the very low amounts of these compounds detected only in some tissues, which has led them to be collectively considered as trace amines. In a previous study, we showed a metabolic interrelationship for TRP in melanoma cell lines. Here, we identified DMT and N,N-dimethyl-N-formyl-kynuramine (DMFK) in the supernatant of cultured SK-Mel-147 cells. Furthermore, when we added DMT to the cell culture, we found hydroxy-DMT (OH-DMT) and indole acetic acid (IAA) in the cell supernatant at 24 h. We found that SK-Mel-147 cells expressed mRNA for myeloperoxidase (MPO) and also had peroxidase activity. We further found that DMT oxidation was catalyzed by peroxidases. DMT oxidation by horseradish peroxidase, H2O2 and MPO from PMA-activated neutrophils produced DMFK, N,N-dimethyl-kynuramine (DMK) and OH-DMT. Oxidation of DMT by peroxidases apparently uses the common peroxidase cycle involving the native enzyme, compound I and compound II. In conclusion, this study describes a possible alternative metabolic pathway for DMT involving peroxidases that has not previously been described in humans and identifies DMT and metabolites in a melanoma cell line. The extension of these findings to other cell types and the biological effects of DMT and its metabolites on cell proliferation and function are key questions for future studies.
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Affiliation(s)
- Melissa M Gomes
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil
| | - Janine B Coimbra
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil
| | - Renan O Clara
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil
| | - Felipe A Dörr
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil
| | - Ana Carolina R Moreno
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil
| | - Jair R Chagas
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Sérgio Tufik
- Department of Psychobiology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Ernani Pinto
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil
| | - Luiz H Catalani
- Department of Fundamental Chemistry, Universidade de Sao Paulo, São Paulo, Brazil
| | - Ana Campa
- Department of Clinical Chemistry and Toxicology, Universidade de São Paulo, São Paulo, Brazil.
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Abstract
Microscopic Polyangiitis (MPA) is a small vessel vasculitis. The disease is defined by the 2012 revised Chapel Hill Consensus Conference Nomenclature of Vasculitides [1] as necrotizing vasculitis, with few or no immune deposits, predominantly affecting small vessels (i.e. capillaries, venules, or arterioles). Necrotizing arteritis involving small and medium arteries may be present. Necrotizing glomerulonephritis is very common. Pulmonary capillaritis often occurs. Granulomatous inflammation is absent. MPA belongs to the ANCA-associated vasculitides (AAV). ANCA in MPA are predominantly directed against myeloperoxidase (MPO-ANCA) but may, in a minority of patients, be directed against proteinase 3 (PR3-ANCA). Not all patients, however, have ANCA. Microscopic polyangiitis (MPA) belongs to the anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides. MPA is clinically characterized by small-vessel vasculitis primarily affecting the kidneys and the lungs but other organs may be involved as well. Renal involvement, which can be the only manifestation, is clinically apparent as rapidly progressive glomerulonephritis and histopathologically as pauci-immune necrotizing and crescentic glomerulonephritis. ANCA in MPA are mainly directed to myeloperoxidase (MPO-ANCA). Besides their diagnostic significance, MPO-ANCA appear pathogenic in MPA. Rituximab with steroids is at least as effective as cyclophosphamide with steroids for induction of remission.
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Affiliation(s)
- Cees G M Kallenberg
- Department of Rheumatology and Clinical Immunology, AA21, University Medical Center Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands.
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Coelho BA, Belo AV, Andrade SP, Amorim WC, Uemura G, da Silva Filho AL. N-acetylglucosaminidase, myeloperoxidase and vascular endothelial growth factor serum levels in breast cancer patients. Biomed Pharmacother 2013; 68:185-9. [PMID: 24295784 DOI: 10.1016/j.biopha.2013.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 10/24/2013] [Indexed: 01/08/2023] Open
Abstract
Inflammatory cells surround breast carcinomas and may act promoting tumor development or stimulating anti-tumor immunity. N-acetylglucosaminidase (NAG) has been employed to detect macrophage accumulation/activation. Myeloperoxidase (MPO) is considered a marker for neutrophils activity/accumulation. Vascular Endothelial Growth Factor (VEGF) is as strong pro-angiogenic cytokine. The aim of this study was to measure the systemic inflammatory response by measuring serum levels of NAG, MPO and VEGF in women diagnosed with breast cancer and associate this response to the peritumoral inflammatory infiltrate and to prognostic factors. Serum samples obtained from women with no evidence of disease (n=31) and with breast cancer (n=68) were analyzed for the activities of NAG, MPO and VEGF by enzymatic assay. Serum levels of NAG and VEGF were higher in healthy volunteers (P<0.0001) and serum levels of MPO were higher in patients with breast cancer (P=0.002). Serum levels of NAG were positively correlated to serum levels of MPO and VEGF (P<0.0001 and P=0.0012, respectively) and MPO and VEGF serum levels had also a positive correlation (P=0.0018). The inflammatory infiltrate was not associated to serum levels of the inflammatory markers, and higher levels of MPO were associated to lymphovascular invasion negativity (P=0.0175).
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Affiliation(s)
- Bertha Andrade Coelho
- Department of Gynecology and Obstetrics, Faculty of Medicine, UNESP, Universidade Estadual Paulista "Julio de Mesquita Filho", Distrito de Rubião Júnior s/n(o) 18, 618-970 Botucatu, São Paulo, Brazil.
| | - Andrezza Vilaça Belo
- Department of Gynecology and Obstetrics, Faculty of Medicine, UFMG, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Sílvia Passos Andrade
- Department of Physiology and Pharmacology, UFMG, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Washington Cançado Amorim
- Department of Gynecology and Obstetrics, Faculty of Medicine, UFMG, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Gilberto Uemura
- Department of Gynecology and Obstetrics, Faculty of Medicine, UNESP, Universidade Estadual Paulista "Julio de Mesquita Filho", Distrito de Rubião Júnior s/n(o) 18, 618-970 Botucatu, São Paulo, Brazil
| | - Agnaldo Lopes da Silva Filho
- Department of Gynecology and Obstetrics, Faculty of Medicine, UNESP, Universidade Estadual Paulista "Julio de Mesquita Filho", Distrito de Rubião Júnior s/n(o) 18, 618-970 Botucatu, São Paulo, Brazil; Department of Gynecology and Obstetrics, Faculty of Medicine, UFMG, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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Alshetaiwi HS, Balivada S, Shrestha TB, Pyle M, Basel MT, Bossmann SH, Troyer DL. Luminol-based bioluminescence imaging of mouse mammary tumors. J Photochem Photobiol B 2013; 127:223-8. [PMID: 24077442 DOI: 10.1016/j.jphotobiol.2013.08.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 12/17/2022]
Abstract
Polymorphonuclear neutrophils (PMNs) are the most abundant circulating blood leukocytes. They are part of the innate immune system and provide a first line of defense by migrating toward areas of inflammation in response to chemical signals released from the site. Some solid tumors, such as breast cancer, also cause recruitment and activation of PMNs and release of myeloperoxidase. In this study, we demonstrate that administration of luminol to mice that have been transplanted with 4T1 mammary tumor cells permits the detection of myeloperoxidase activity, and consequently, the location of the tumor. Luminol allowed detection of activated PMNs only two days after cancer cell transplantation, even though tumors were not yet palpable. In conclusion, luminol-bioluminescence imaging (BLI) can provide a pathway towards detection of solid tumors at an early stage in preclinical tumor models.
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Affiliation(s)
- Hamad S Alshetaiwi
- Department of Anatomy and Physiology, 228 Coles Hall, Kansas State University, Manhattan, KS 66506, USA.
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Muneuchi G, Hossain A, Yamaguchi F, Ueno M, Tanaka Y, Suzuki S, Tokuda M. The rare sugar D-allose has a reducing effect against ischemia-reperfusion injury on the rat abdominal skin island flap model. J Surg Res 2013; 183:976-81. [PMID: 23541813 DOI: 10.1016/j.jss.2013.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 02/20/2013] [Accepted: 03/01/2013] [Indexed: 10/27/2022]
Abstract
BACKGROUND Recently, one of the rare sugars, D-allose, has received attention from many researchers because of its availability for mass production and its various physiological functions. Among these, an antioxidative effect has been strongly suggested. In this study, we investigated whether this effect is also applicable to the field of skin surgery. METHODS In ischemia-reperfusion injury model using the rat abdominal skin island flap (male Wistar rats, n = 110), D-allose was injected intravenously 15 min before 8-h ischemia. The survival area (%) was measured by digital photographic assessment 1 wk after surgery, and multiple comparisons (Fisher's protected least significant difference) were carried out. Histopathological examination (neutrophilic infiltration into dermis in hematoxylin and eosin stain) and immunostaining (of ectodermal dysplasia-1 (ED1)-positive cells/flap) were assessed. Myeloperoxidase (MPO) activity in the skin flap (sampling at the time of 8 h after reperfusion) was measured spectrophotometrically, and Student t-test was performed. RESULTS D-allose extended the survival of the remaining flaps, and a dose greater than 30 mg (0.1 mg/g) was necessary to be effective. The flap survival rates in the 30, 60, and 150 mg groups were significantly higher than that in the control (saline) group: 75.87 ± 5.90, 79.27 ± 7.81, and 77.87 ± 6.20 versus 50.53 ± 9.66, respectively (P < 0.05). ED1-positive cells/flap in 60 mg of D-allose and control (saline) were 78 ± 25.7 versus 124 ± 15.8, respectively (P = 0.08). The MPO activity in the D-allose 60 mg group was 0.40 ± 0.04, and that in the control (saline) was 0.72 ± 0.12. D-allose significantly reduced the skin tissue MPO activity (P < 0.05) compared with that in the control (saline) group. CONCLUSIONS We proved that D-allose has a reducing effect against ischemia-reperfusion injury on the skin island flap model, and the mechanism is related to inhibiting the activity of neutrophils in the skin tissues. Compared with chemo-synthetic materials, rare sugars are safer for our bodies as well as the environment; therefore, this rare sugar project is expected to lead to the development of a safer antioxidant for skin flap surgery.
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Affiliation(s)
- Gan Muneuchi
- Department of Plastic and Reconstructive Surgery, Kagawa University, Kagawa, Japan.
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