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Geravand S, Karami M, Sahraei H, Rahimi F. Protective effects of L-arginine on Alzheimer's disease: Modulating hippocampal nitric oxide levels and memory deficits in aluminum chloride-induced rat model. Eur J Pharmacol 2023; 958:176030. [PMID: 37660966 DOI: 10.1016/j.ejphar.2023.176030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/21/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023]
Abstract
There is evidence that high daily intake of aluminum (Al) is associated with an increased risk of dementia or cognitive decline. We injected L-arginine into the dorsal hippocampus (DH) of an AlCl3-induced Alzheimer's model and studied memory deficit, β-amyloid (βA) accumulation, neurodegeneration, and molecular changes. Male Wistar rats were cannulated unilaterally in the DH under a stereotaxic apparatus and a dose of AlCl3 (1-200 μg/rat) was injected into the CA1. After recovery, L-arginine and L-NAME (0.05-25 μg/rat) were injected into CA1 and animals were tested in novelty seeking task. One group received βA (2 μg/rat, intra CA1) as a reference group. Control groups received saline (1 μL/rat, intra-CA1) and galantamine (25 μg/rat, intra-CA1), respectively. Finally, rats were anesthetized and hippocampal tissues were isolated on ice. Levels of neuronal NO synthase (nNOS), β-secretase and soluble guanylyl cyclase (sGC) were measured by western blotting. βA formation and the number of CA1 neurons were assessed by Congo red and Nissl staining. NOS activation by NADPH-diaphorase (NADPH-d) was investigated. All data were analyzed using analysis of variance (ANOVA) at α = 0.05 level. Like βA, AlCl3 (25 μg/rat) caused accumulation of βA in the DH and increased stopping of the animal on the novel side (indicating a recall deficit). CA1 neurons decreased, and nNOS and β-secretase, but not sGC, showed a change consistent with Alzheimer's. However, prophylactic intervention of L-arginine at 3-9 μg/rat was protective, probably by nNOS stimulation in DH, as shown by NADPH-d assay. L-arginine may protect against Alzheimer's by increasing hippocampal NO levels.
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Affiliation(s)
- Samira Geravand
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran.
| | - Manizheh Karami
- Department of Biology, Faculty of Basic Sciences, Shahed University, Tehran, Iran.
| | - Hedayat Sahraei
- Department of Physiology, School of Medicine, Baghiyatallah University of Medical Sciences, Tehran, Iran
| | - Fardin Rahimi
- Faculty of Medicine, Shahed University, Tehran, Iran
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2
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Carter S, Hill AM, Mead LC, Wong HY, Yandell C, Buckley JD, Tan SY, Rogers GB, Fraysse F, Coates AM. Almonds vs. carbohydrate snacks in an energy-restricted diet: Weight and cardiometabolic outcomes from a randomized trial. Obesity (Silver Spring) 2023; 31:2467-2481. [PMID: 37621033 DOI: 10.1002/oby.23860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 08/26/2023]
Abstract
OBJECTIVE This study evaluated weight and cardiometabolic outcomes after a 3-month energy-restricted diet (-30%) containing almonds (almond-enriched diet [AED]) or containing carbohydrate-rich snacks (nut-free control diet [NFD]) (Phase 1), followed by 6 months of weight maintenance (Phase 2). METHODS Participants (25-65 years old) with overweight or obesity (BMI 27.5-34.9 kg/m2 ) were randomly allocated to AED (n = 68) or NFD (n = 72). RESULTS Both groups lost weight during Phase 1 (p < 0.001) (mean [SE], -7.0 [0.5] kg AED vs. -7.0 [0.5] kg NFD, p = 0.858) and Phase 2 (p = 0.009) (-1.1 [0.5] kg AED vs. -1.3 [0.6] NFD, p = 0.756), with improvements in percentage lean mass after Phase 2 (4.8% [0.3%], p < 0.001). Reductions occurred in fasting glucose (-0.2 [0.07] mmol/L, p = 0.003), insulin (-8.1 [4.0] pmol/L, p = 0.036), blood pressure (-4.9 [0.8] mm Hg systolic, -5.0 [0.5] mm Hg diastolic, p < 0.001), total cholesterol (-0.3 [0.1] mmol/L), low-density lipoprotein (LDL) (-0.2 [0.1] mmol/L), very low-density lipoprotein (-0.1 [0.03] mmol/L), and triglycerides (-0.3 [0.06] mmol/L) (all p < 0.001), and high-density lipoprotein increased (0.1 [0.02] mmol/L, p = 0.011) by the end of Phase 2 in both groups. There were group by time interactions for lipoprotein particle concentrations: very small triglyceride-rich (-31.0 [7.7] nmol/L AED vs. -4.8 [7.9] nmol/L NFD, p = 0.007), small LDL (-109.3 [40.5] nmol/L AED vs. -20.7 [41.6] nmol/L NFD, p = 0.017), and medium LDL (-24.4 [43.4] nmol/L AED vs. -130.5 [44.4] nmol/L NFD, p = 0.045). CONCLUSIONS An energy-restricted AED resulted in weight loss and weight loss maintenance comparable to an energy-restricted NFD, and both diets supported cardiometabolic health. The AED resulted in greater improvements in some lipoprotein subfractions, which may enhance reductions in cardiovascular risk.
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Affiliation(s)
- Sharayah Carter
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Alison M Hill
- Clinical and Health Sciences, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Lauren C Mead
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Hoi Y Wong
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Catherine Yandell
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Jonathan D Buckley
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Sze-Yen Tan
- School of Exercise and Nutrition Sciences, Institute for Physical Activity and Nutrition (IPAN), Deakin University, Geelong, Victoria, Australia
| | - Geraint B Rogers
- Microbiome Research, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia
- College of Medicine and Public Health, Flinders University, Bedford Park, South Australia, Australia
| | - Francois Fraysse
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
| | - Alison M Coates
- Allied Health & Human Performance, Alliance for Research in Exercise, Nutrition and Activity (ARENA), University of South Australia, Adelaide, South Australia, Australia
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3
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Usategui-Martín R, Jiménez-Arribas P, Sakas-Gandullo C, González-Sarmiento R, Rodríguez-Arias CA. Endothelial nitric oxide synthase rs1799983 gene polymorphism is associated with the risk of developing intracranial aneurysm. Acta Neurochir (Wien) 2023; 165:1261-1267. [PMID: 36932233 DOI: 10.1007/s00701-023-05552-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/20/2023] [Indexed: 03/19/2023]
Abstract
PURPOSE The intracranial aneurysm (IA) rupture is associated with a subarachnoid hemorrhage. One third of patients die, and one third remain depend for daily activities. Genetic factors are crucial in the formation and clinical evolution of IAs. Multiple loci have been associated with AIs, much of them implicating multiple pathways related to vascular endothelial maintenance and extracellular matrix integrity. Thus, the aim of our study was to characterize whether polymorphisms in genes implicated in the vascular endothelial maintenance could modify the risk of developing IAs. SUBJECTS AND METHODS We have studied 176 patients with IA recruited in the Service of Neurosurgery at the University Hospital of Valladolid (Spain) and a control group if 150 sex-matched healthy subjects. Clinical variables were collected from each patient. We have analyzed VEGFA rs833061, VEGFR2 rs2071559, endothelin rs5370, endoglin rs3739817, and eNOS rs1799983 polymorphisms. RESULTS Our results showed that allele T of the eNOS rs1799983 polymorphism is correlated with decreased risk of developing the disease; thus, allele G of the eNOS rs1799983 polymorphism increased the risk of developing IA. CONCLUSION The association of eNOS rs1799983 polymorphism with the risk to suffer IA reinforces the hypothesis that genetic variants in eNOS gene could be crucial in the pathogenesis of IA.
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Affiliation(s)
- Ricardo Usategui-Martín
- Department of Cell Biology, Genetics, Histology and Pharmacology, University of Valladolid, Valladolid, Spain.,Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain.,Salamanca Institute of Biomedical Research (IBSAL), University Hospital of Salamanca-University of Salamanca, Salamanca, Spain
| | | | - Carmen Sakas-Gandullo
- Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain
| | - Rogelio González-Sarmiento
- Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain.,Salamanca Institute of Biomedical Research (IBSAL), University Hospital of Salamanca-University of Salamanca, Salamanca, Spain.,Institute of Molecular and Cellular Biology of Cancer (IBMCC), University of Salamanca-CSIC, Salamanca, Spain
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4
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Fatima K, Rashid AM, Memon UAA, Fatima SS, Javaid SS, Shahid O, Zehri F, Obaid MA, Ahmad M, Almas T, Minhas AMK. Mediterranean Diet and its Effect on Endothelial Function: A Meta-analysis and Systematic Review. Ir J Med Sci 2023; 192:105-113. [PMID: 35192097 PMCID: PMC9892125 DOI: 10.1007/s11845-022-02944-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 02/01/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND Endothelial dysfunction serves as an early marker for the risk of cardiovascular disease (CVD); therefore, it is a site of therapeutic interventions to reduce the risk of CVD. AIMS To examine the effect of the Mediterranean diet (MedDiet), as an intervention, on structural and functional parameters of endothelial function, and how it may reduce the risk of CVD and associated mortality. METHODS Medline database was searched for randomized controlled trials. Random-effects meta-analysis was conducted on 21 independent datasets. Meta-regression and subgroup analysis were performed to assess whether the effect of MedDiet was modified by health status (healthy subjects or with increased CVD risk), type of MedDiet intervention (alone or combined), type of parameter (functional or structural), study design (cross-over or parallel), BMI, age, and study duration. Our study used sample size, mean, and standard deviation of endothelial function measurements for both MedDiet intervention and control in the analyses. RESULTS Inverse relationship between endothelial function and intake of MedDiet was observed (SMD: 0.34; 95% CI: 0.16, 0.52; P = 0.0001). Overall, MedDiet increased FMD by 1.39% (95% CI: 0.47, 2.19; P < 0.001). There was a significant improvement in endothelial function in both healthy patients and in those with an increased risk of CVD. No significant variation was observed in the effects of MedDiet on endothelial function, due to study design or type of intervention. CONCLUSIONS These findings support that MedDiet can reduce the risk of CVD by improving endothelial function.
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Affiliation(s)
- Kaneez Fatima
- grid.412080.f0000 0000 9363 9292Department of Medicine, Dow University of Health Sciences, Karachi, Pakistan
| | - Ahmed Mustafa Rashid
- grid.415944.90000 0004 0606 9084Department of Medicine, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Usama Abdul Ahad Memon
- grid.415944.90000 0004 0606 9084Department of Medicine, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Syeda Sidra Fatima
- grid.412080.f0000 0000 9363 9292Department of Medicine, Dow University of Health Sciences, Karachi, Pakistan
| | - Syed Sarmad Javaid
- grid.415944.90000 0004 0606 9084Department of Medicine, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Omema Shahid
- grid.413093.c0000 0004 0571 5371Department of Medicine, Ziauddin Medical University, Karachi, Pakistan
| | - Fazila Zehri
- grid.412080.f0000 0000 9363 9292Department of Medicine, Dow University of Health Sciences, Karachi, Pakistan
| | - Muhammad Adil Obaid
- grid.415944.90000 0004 0606 9084Department of Medicine, Jinnah Sindh Medical University, Karachi, Pakistan
| | - Mahlika Ahmad
- grid.413093.c0000 0004 0571 5371Department of Medicine, Ziauddin Medical University, Karachi, Pakistan
| | - Talal Almas
- grid.4912.e0000 0004 0488 7120Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Abdul Mannan Khan Minhas
- grid.414961.f0000 0004 0426 4740Department of Internal Medicine, Forrest General Hospital, Hattiesburg, MS USA
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5
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Influence of cardiac function on intermittent hypoxia in rats fed with high-fat diet. Biochem Biophys Rep 2022; 32:101393. [DOI: 10.1016/j.bbrep.2022.101393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 11/24/2022] Open
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Akkaya H, Güntürk EE, Akkaya F, Karabıyık U, Güntürk İ, Yılmaz S. Avaliação da Relação entre Níveis de Adropina e Circulação Colateral Coronária em Pacientes com Síndrome Coronariana Crônica. Arq Bras Cardiol 2022; 119:402-410. [PMID: 35766616 PMCID: PMC9438532 DOI: 10.36660/abc.20210573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 01/26/2022] [Indexed: 11/18/2022] Open
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Rodríguez L, Mendez D, Montecino H, Carrasco B, Arevalo B, Palomo I, Fuentes E. Role of Phaseolus vulgaris L. in the Prevention of Cardiovascular Diseases-Cardioprotective Potential of Bioactive Compounds. PLANTS (BASEL, SWITZERLAND) 2022; 11:186. [PMID: 35050073 PMCID: PMC8779353 DOI: 10.3390/plants11020186] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/30/2021] [Accepted: 01/01/2022] [Indexed: 05/07/2023]
Abstract
In terms of safe and healthy food, beans play a relevant role. This crop belongs to the species of Phaseolusvulgaris L., being the most consumed legume worldwide, both for poor and developed countries, the latter seek to direct their diet to healthy feeding, mainly low in fat. Phaseolus vulgaris L. stands out in this area-an important source of protein, vitamins, essential minerals, soluble fiber, starch, phytochemicals, and low in fat from foods. This species has been attributed many beneficial properties for health; it has effects on the circulatory system, immune system, digestive system, among others. It has been suggested that Phaseolus vulgaris L. has a relevant role in the prevention of cardiovascular events, the main cause of mortality and morbidity worldwide. Conversely, the decrease in the consumption of this legume has been related to an increase in the prevalence of cardiovascular diseases. This review will allow us to relate the nutritional level of this species with cardiovascular events, based on the correlation of the main bioactive compounds and their role as cardiovascular protectors, in addition to revealing the main mechanisms that explain the cardioprotective effects regulated by the bioactive components.
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Affiliation(s)
- Lyanne Rodríguez
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Medical Technology School, Universidad de Talca, Talca 3460000, Chile; (L.R.); (D.M.); (H.M.)
| | - Diego Mendez
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Medical Technology School, Universidad de Talca, Talca 3460000, Chile; (L.R.); (D.M.); (H.M.)
| | - Hector Montecino
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Medical Technology School, Universidad de Talca, Talca 3460000, Chile; (L.R.); (D.M.); (H.M.)
| | - Basilio Carrasco
- Centro de Estudios en Alimentos Procesados, Talca 3460000, Chile; (B.C.); (B.A.)
| | - Barbara Arevalo
- Centro de Estudios en Alimentos Procesados, Talca 3460000, Chile; (B.C.); (B.A.)
| | - Iván Palomo
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Medical Technology School, Universidad de Talca, Talca 3460000, Chile; (L.R.); (D.M.); (H.M.)
| | - Eduardo Fuentes
- Thrombosis Research Center, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Medical Technology School, Universidad de Talca, Talca 3460000, Chile; (L.R.); (D.M.); (H.M.)
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8
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Sanzana S, Rodríguez L, Barraza Barrionuevo H, Albornoz Poblete C, Maróstica Junior MR, Fuentes E, Palomo I. Antiplatelet Activity of Cucurbita maxima. J Med Food 2021; 24:1197-1205. [PMID: 34463138 DOI: 10.1089/jmf.2021.0006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Natural extracts constitute an important source in the prevention of noncommunicable diseases, such as cardiovascular diseases. The pumpkin, Cucurbita maxima, is widely consumed in Chile. Pumpkin seeds, despite having crude protein, lipids, and carbohydrates, are regarded as agro-industrial waste. In this work, we correlated the antiplatelet activity of aqueous, ethanolic, and methanolic extracts from pumpkin seeds with their bioactive compounds. In vitro platelet aggregation and activation studies were performed by turbidimetry and flow cytometry, respectively. Results reveal that the extracts inhibited, in a dose-dependent manner, platelet aggregation induced by adenosine diphosphate, thrombin receptor activator peptide 6 (TRAP-6), and collagen. Pumpkin seed extracts inhibited P-selectin secretion and glycoprotein IIb/IIIa activation on TRAP-6-activated platelets. They were found to be rich in fatty acids and a powerful source of plant-based protein, which could be related to the high antiplatelet potential identified in extracts. This research demonstrated that pumpkin seed extracts could be a candidate in the prevention of thrombotic events.
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Affiliation(s)
- Sigrid Sanzana
- Department of Medical Technology, Faculty of Health Sciences, University of Antofagasta, Antofagasta, Chile
| | - Lyanne Rodríguez
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | - Hayleen Barraza Barrionuevo
- Department of Food and Nutrition Sciences, Faculty of Health Sciences, University of Antofagasta, Antofagasta, Chile
| | - César Albornoz Poblete
- Department of Food and Nutrition Sciences, Faculty of Health Sciences, University of Antofagasta, Antofagasta, Chile
| | - Mário Roberto Maróstica Junior
- Ibero-American Network for the Integrated Use of Underutilized Indigenous Foods (ALSUB-CYTED).,School of Food Engineering, University of Campinas, Campinas, São Paulo, Brazil.,University of Campinas (UNICAMP), Faculty of School Engineering (FEA), Campinas, São Paulo, Brazil
| | - Eduardo Fuentes
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | - Iván Palomo
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
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9
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Gąsecka A, Szwed P, Jasińska K, Fidali O, Kłębukowska A, Eyileten C, Postula M, Szarpak Ł, Mazurek T, Opolski G, Filipiak KJ, Ufnal M. Symmetric Dimethylarginine is Altered in Patients After Myocardial Infarction and Predicts Adverse Outcomes. J Inflamm Res 2021; 14:3797-3808. [PMID: 34408463 PMCID: PMC8364360 DOI: 10.2147/jir.s316078] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 06/17/2021] [Indexed: 11/23/2022] Open
Abstract
PURPOSE Acute myocardial infarction (AMI) is the leading cause of morbidity and mortality worldwide. Damage to the endothelium is the earliest event in atherothrombosis, including AMI. Nitric oxide (NO), an endothelium-derived compound, protects the vasculature from damage. This study evaluated whether an association exists between plasma concentration of endogenous NO-related pathway metabolites linked to AMI and major adverse cardiovascular events (MACE) after AMI. METHODS We compared plasma concentrations of NO-related pathway metabolites in patients after AMI (n=60) and healthy controls (n=27) and investigated the prognostic value of these metabolites for post-AMI MACE development over a median of 3.5-years. In search of biomarkers, we compared plasma concentrations of dimethylarginines (ADMA, SDMA), citrulline, arginine and ornithine using ultra performance liquid chromatograph coupled with a mass spectrometer. RESULTS Patients after AMI had higher concentrations of dimethylarginines, compared to controls (p=0.0068, p<0.0001, respectively). Conversely, the concentration of citrulline was lower in the AMI group (p=0.0006). The concentration of SDMA was higher in patients who developed MACE than in those who did not (p=0.015). SDMA was the only independent predictor of MACE in multivariate analysis (p=0.023). There was an intermediate, negative correlation between plasma SDMA level and platelet reactivity (r=-0.33, p=0.02). CONCLUSION Plasma concentration of dimethylarginines differs between patients with AMI and healthy volunteers. The study's novel finding is that SDMA is an independent predictor of MACE during a 3.5 year follow-up period after AMI.
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Affiliation(s)
- Aleksandra Gąsecka
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Piotr Szwed
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Karolina Jasińska
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Oliwia Fidali
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Aleksandra Kłębukowska
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Ceren Eyileten
- Department of Experimental and Clinical Pharmacology, Centre for Preclinical Research and Technology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Marek Postula
- Department of Experimental and Clinical Pharmacology, Centre for Preclinical Research and Technology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Łukasz Szarpak
- Bialystok Oncology Center, Bialystok, 15-027, Poland
- Maria Sklodowska-Curie Medical Academy in Warsaw, Warsaw, 03-411, Poland
| | - Tomasz Mazurek
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Grzegorz Opolski
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Krzysztof J Filipiak
- 1st Chair and Department of Cardiology, Medical University of Warsaw, Warsaw, 02-097, Poland
| | - Marcin Ufnal
- Department of Experimental Physiology and Pathophysiology, Centre for Preclinical Research and Technology, Medical University of Warsaw, Warsaw, 02-106, Poland
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10
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Karahan I, Durmaz Ceylan S, Gungunes A, Cifci A, Eker F, Kisa U. Non-functioning adrenal incidentalomas may increase toxic metabolites. Wien Klin Wochenschr 2021; 134:125-129. [PMID: 34255169 DOI: 10.1007/s00508-021-01909-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 06/15/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Non-functioning adrenal incidentaloma (NFAI) is a frequent diagnosis with increasing radiological tests. The emerging shreds of evidence showed that they might have negative cardiometabolic effects. The study aimed to investigate whether the toxic metabolites, asymmetric dimethylarginine (ADMA) levels, were altered in NFAI patients. METHODS We included 43 NFAI patients and 41 controls with similar ages and body mass indices in the study. We compared plasma ADMA levels of both groups and noted the radiological features of NFAIs. RESULTS The ADMA levels were significantly higher in NFAI patients than in the control group (307.04 ng/ml, range 81.89-577.7 ng/ml vs 192.54 ng/ml, range 70.61-440.26 ng/ml, p = 0.001). Nevertheless, we could not reach a significant correlation between ADMA levels and mass size. CONCLUSION The ADMA is known as a toxin and is increased in NFAI patients. NFAIs may not be innocent and may be considered a potential risk for the body. Further investigations were needed for more explanations.
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Affiliation(s)
- Irfan Karahan
- School of Medicine, Department of Internal Medicine, Kırıkkale University, Yahsihan, 71450, Kırıkkale, Turkey.
| | - Senay Durmaz Ceylan
- School of Medicine, Department of Endocrinology & Metabolism, Kırıkkale University, Yahsihan, 71450, Kırıkkale, Turkey
| | - Askin Gungunes
- School of Medicine, Department of Endocrinology & Metabolism, Kırıkkale University, Yahsihan, 71450, Kırıkkale, Turkey
| | - Aydın Cifci
- School of Medicine, Department of Internal Medicine, Kırıkkale University, Yahsihan, 71450, Kırıkkale, Turkey
| | - Fatih Eker
- Çanakkale Yenice Government Hospital, Canakkale, Turkey
| | - Ucler Kisa
- School of Medicine, Department of Biochemistry, Kırıkkale University, Yahsihan, 71450, Kırıkkale, Turkey
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11
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Ushio-Fukai M, Ash D, Nagarkoti S, Belin de Chantemèle EJ, Fulton DJR, Fukai T. Interplay Between Reactive Oxygen/Reactive Nitrogen Species and Metabolism in Vascular Biology and Disease. Antioxid Redox Signal 2021; 34:1319-1354. [PMID: 33899493 PMCID: PMC8418449 DOI: 10.1089/ars.2020.8161] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Reactive oxygen species (ROS; e.g., superoxide [O2•-] and hydrogen peroxide [H2O2]) and reactive nitrogen species (RNS; e.g., nitric oxide [NO•]) at the physiological level function as signaling molecules that mediate many biological responses, including cell proliferation, migration, differentiation, and gene expression. By contrast, excess ROS/RNS, a consequence of dysregulated redox homeostasis, is a hallmark of cardiovascular disease. Accumulating evidence suggests that both ROS and RNS regulate various metabolic pathways and enzymes. Recent studies indicate that cells have mechanisms that fine-tune ROS/RNS levels by tight regulation of metabolic pathways, such as glycolysis and oxidative phosphorylation. The ROS/RNS-mediated inhibition of glycolytic pathways promotes metabolic reprogramming away from glycolytic flux toward the oxidative pentose phosphate pathway to generate nicotinamide adenine dinucleotide phosphate (NADPH) for antioxidant defense. This review summarizes our current knowledge of the mechanisms by which ROS/RNS regulate metabolic enzymes and cellular metabolism and how cellular metabolism influences redox homeostasis and the pathogenesis of disease. A full understanding of these mechanisms will be important for the development of new therapeutic strategies to treat diseases associated with dysregulated redox homeostasis and metabolism. Antioxid. Redox Signal. 34, 1319-1354.
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Affiliation(s)
- Masuko Ushio-Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Dipankar Ash
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Sheela Nagarkoti
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Eric J Belin de Chantemèle
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Medicine (Cardiology) and Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - David J R Fulton
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Tohru Fukai
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA.,Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia, USA
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12
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Iritas SB, Dip A, Gunduzoz M, Tutkun L, Turksoy VA, Deniz S, Tekin G, Oztan O, Unlu A. Assessment of potential cardiovascular risk in trichloroethylene exposure by serum methylated arginine levels. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2021; 31:63-74. [PMID: 31232082 DOI: 10.1080/09603123.2019.1628927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 06/04/2019] [Indexed: 06/09/2023]
Abstract
Trichloroethylene (TCE) is a widely used solvent in industrial applications and has toxic effects on various systems. Methylated arginine amino acids (eg asymmetric dimethyl arginine (ADMA), symmetric dimethyl arginine (SDMA)) cause the development of cardiovascular disease by inhibiting NO synthesis, which is considered to be heart-protector. The aim of this study is to determine the risk of cardiovascular diseases in TCE exposure by methylated arginine biomarkers. About 98 controls and 100 TCE-exposed male subjects were included in the study. Trichloroacetic acid (urinary metabolite of TCE), arginine, homoarginine, citrulline ADMA, SDMA, and N-monomethyl L-arginine (L-NMMA) levels were found significantly higher than control group (p < 0.001). The strongest correlation was found between ADMA and Trichloroacetic acid (TCA) level (r = 0.453, p < 0.01). Long-term TCE exposure, may be an important risk factor for cardiovascular diseases by increasing methylated arginine levels.
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Affiliation(s)
- Servet Birgin Iritas
- Department of Ankara Branch Directorate, The Council of Forensic Medicine , Ankara, Turkey
| | - Aybike Dip
- Department of Chemistry, The Council of Forensic Medicine , Adana, Turkey
| | - Meside Gunduzoz
- Department of Family Medicine, Ankara Occupational Diseases Hospital Ankara , Turkey
| | - Lutfiye Tutkun
- Department of Biochemistry, Yozgat Bozok University Faculty of Medicine , Yozgat, Turkey
| | - Vugar Ali Turksoy
- Department of Public Health , Yozgat Bozok University Faculty of Medicine, Yozgat, Turkey
| | - Serdar Deniz
- Unit of Community Health Center, Provincial Health Directorate , Malatya, Turkey
| | - Gulsum Tekin
- Vocational School of Health Sciences, Selcuk University , Konya, Turkey
| | - Ozgur Oztan
- Department of Medical Management, HLC Medical Center , Ankara, Turkey
| | - Ali Unlu
- Department of Biochemistry, Selcuk University Faculty of Medicine , Konya, Turkey
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13
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Assallum H, Song TY, Aronow WS, Chandy D. Obstructive sleep apnoea and cardiovascular disease: a literature review. Arch Med Sci 2021; 17:1200-1212. [PMID: 34522249 PMCID: PMC8425247 DOI: 10.5114/aoms.2019.88558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/03/2019] [Indexed: 12/22/2022] Open
Abstract
As obesity becomes more common worldwide, the prevalence of obstructive sleep apnoea (OSA) continues to rise. Obstructive sleep apnoea is a well-known disorder that causes chronic intermittent hypoxia (CIH), which is considered a risk factor for atherosclerosis directly and indirectly. Ischaemic heart disease remains the leading cause of death. Most risk factors for atherosclerosis are well understood. However, other factors such as CIH are less well understood. Several studies have investigated the pathophysiology of CIH, attempting to uncover its link to atherosclerosis and to determine whether OSA treatment can be a therapeutic modality to modify the risk for atherosclerosis. In this article, we will review the pathophysiology of OSA as an independent risk factor for cardiovascular disease and discuss the most common markers that have been studied. We will also examine the potential impact of OSA management as a risk factor modifier on the reversibility of atherosclerosis.
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Affiliation(s)
- Hussein Assallum
- Division of Pulmonary, Critical Care, and Sleep Medicine, New York Medical College, Valhalla, NY, USA
| | - Tian Yue Song
- Division of Pulmonary, Critical Care, and Sleep Medicine, New York Medical College, Valhalla, NY, USA
| | | | - Dipak Chandy
- Division of Pulmonary, Critical Care, and Sleep Medicine, New York Medical College, Valhalla, NY, USA
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14
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Ertelt A, Stumpff F, Merle R, Kuban S, Bollinger L, Liertz S, Gehlen H. Asymmetric dimethylarginine-A potential cardiac biomarker in horses. J Vet Cardiol 2020; 33:43-51. [PMID: 33360109 DOI: 10.1016/j.jvc.2020.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 11/06/2020] [Accepted: 11/17/2020] [Indexed: 12/22/2022]
Abstract
INTRODUCTION/OBJECTIVES Asymmetric dimethylarginine (ADMA) is a cardiac biomarker in humans, symmetric dimethylarginine (SDMA) a renal biomarker in humans, cats, and dogs. The purpose of this prospective study was to investigate if measuring serum ADMA and SDMA concentrations via ELISA allows detection of cardiac disease in horses in a routine laboratory setting. In this context, reference values in horses were established. ANIMALS, MATERIALS, AND METHODS Seventy-eight horses with no known medical history were compared to 23 horses with confirmed structural cardiac disease with/or without arrhythmias. Horses underwent physical examination, electrocardiography, echocardiography and venous blood sampling and were staged based on the severity of cardiac disease from 0 to II. Asymmetric dimethylarginine and SDMA were measured via ELISA and crosschecked using liquid chromatograph triple quadrupole mass spectrometry. Reference intervals with 90th percent confidence intervals were evaluated and standard software was used to test for significant differences in ADMA, SDMA, and the l-arginine/ADMA ratio between groups. RESULTS The reference ranges were 1.7-3.8 μmol/L and 0.3-0.8 μmol/L for ADMA and SDMA, respectively. Serum ADMA was higher in horses with heart disease compared to healthy horses (p < 0.01) and highest in horses with stage II heart disease (p = 0.02). The l-Arginine/ADMA ratio was significantly higher in healthy animals than those with cardiac disease (p = 0.001). CONCLUSIONS Reference values for serum ADMA and SDMA using ELISA methods are presented in horses. This study confirms the association between heart disease and increased serum ADMA concentration as well as a decreased l-Arginine/ADMA ratio in horses.
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Affiliation(s)
- A Ertelt
- Equine Clinic, Internal Medicine, Freie Universitaet Berlin, Oertzenweg 19b, 14193, Berlin, Germany.
| | - F Stumpff
- Institute of Veterinary Physiology, Freie Universitaet Berlin, Oertzenweg 19b, 14163, Berlin, Germany
| | - R Merle
- Institute for Veterinary Epidemiology and Biostatistics, Freie Universitaet Berlin, Koenigsweg 67, 14163, Berlin, Germany
| | - S Kuban
- Equine Clinic, Internal Medicine, Freie Universitaet Berlin, Oertzenweg 19b, 14193, Berlin, Germany
| | - L Bollinger
- Equine Clinic, Internal Medicine, Freie Universitaet Berlin, Oertzenweg 19b, 14193, Berlin, Germany
| | - S Liertz
- Equine Clinic, Internal Medicine, Freie Universitaet Berlin, Oertzenweg 19b, 14193, Berlin, Germany
| | - H Gehlen
- Equine Clinic, Internal Medicine, Freie Universitaet Berlin, Oertzenweg 19b, 14193, Berlin, Germany
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15
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Kapil V, Khambata RS, Jones DA, Rathod K, Primus C, Massimo G, Fukuto JM, Ahluwalia A. The Noncanonical Pathway for In Vivo Nitric Oxide Generation: The Nitrate-Nitrite-Nitric Oxide Pathway. Pharmacol Rev 2020; 72:692-766. [DOI: 10.1124/pr.120.019240] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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16
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L-arginine supplementation lowers blood pressure, protein excretion and plasma lipid profile in experimental salt-induced hypertension in pregnancy: Relevance to preeclampsia. PATHOPHYSIOLOGY 2019; 26:191-197. [DOI: 10.1016/j.pathophys.2019.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/08/2019] [Accepted: 02/12/2019] [Indexed: 12/18/2022] Open
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17
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Zhao CN, Wu Q, Mao YM, Liu LN, Dan YL, Li XM, Wang DG, Pan HF. Elevated circulating asymmetric dimethylarginine levels in rheumatoid arthritis: a systematic review and meta-analysis. Amino Acids 2019; 51:773-782. [DOI: 10.1007/s00726-019-02714-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 02/18/2019] [Indexed: 12/26/2022]
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18
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Motta NAV, Fumian MM, Medeiros RF, Lima GF, Scaramello CBV, Oliveira KJ, Nóbrega ACL, Brito FCF. Aerobic Training Associated with Arginine Supplementation Reduces Collagen-Induced Platelet Hyperaggregability in Rats under High Risk to Develop Metabolic Syndrome. Int J Endocrinol 2019; 2019:8919435. [PMID: 30723500 PMCID: PMC6339713 DOI: 10.1155/2019/8919435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/24/2018] [Accepted: 11/11/2018] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Increased platelet response is seen in individuals with metabolic syndrome. Previous reports have shown that arginine supplementation and aerobic exercise training enhance vascular nitric oxide (NO) activity and inhibit platelet hyperaggregability; however, the effects of their association remain unknown. AIM To investigate whether arginine supplementation and aerobic exercise association may exert beneficial effects, reducing platelet hyperaggregability in rats under high risk to develop metabolic syndrome. METHODS Wistar rats were divided into two groups: control (C) and fructose (F - water with 10% of fructose). After two weeks, the F group was subdivided into four groups: F, the same as before; fructose + arginine (FA - 880 mg/kg/day of L-arginine by gavage); fructose + training (FT); and fructose + arginine + training (FTA). Treatment lasted for eight weeks. RESULTS The fructose administration was able to increase the collagen-induced platelet aggregation (27.4 ± 2.7%) when compared to the C group (8.0 ± 3.4%). Although the arginine supplementation (32.2 ± 6.3%) or aerobic training (23.8 ± 6.5%) did not promote any change in platelet collagen-induced hyperaggregability, the association of arginine supplementation and aerobic exercise promoted an inhibition of the platelet hyperaggregability induced by fructose administration (13.9 ± 4.4%) (P < 0.05). These effects were not observed when ADP was employed as an agonist. In addition, arginine supplementation associated with aerobic exercise promoted a decrease in interleukin-6 (IL-6) and interleukin-8 (IL-8) serum levels when compared to the fructose group, demonstrating an anti-inflammatory effect. CONCLUSIONS Our data indicate an important role of arginine supplementation associated with aerobic exercise, reducing platelet hyperaggregability and inflammatory biomarker levels in rats under high risk to develop metabolic syndrome.
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Affiliation(s)
- Nadia A. V. Motta
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, 24420-210 Niterói, RJ, Brazil
| | - Milla M. Fumian
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, 24420-210 Niterói, RJ, Brazil
| | - Renata F. Medeiros
- Department of Physiology and Pharmacology, Fluminense Federal University (UFF), 24420-210 Niterói, Rio de Janeiro, Brazil
| | - Gabriel F. Lima
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, 24420-210 Niterói, RJ, Brazil
| | - Christianne B. V. Scaramello
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, 24420-210 Niterói, RJ, Brazil
- Department of Physiology and Pharmacology, Fluminense Federal University (UFF), 24420-210 Niterói, Rio de Janeiro, Brazil
| | - Karen J. Oliveira
- Department of Physiology and Pharmacology, Fluminense Federal University (UFF), 24420-210 Niterói, Rio de Janeiro, Brazil
| | - Antonio C. L. Nóbrega
- Department of Physiology and Pharmacology, Fluminense Federal University (UFF), 24420-210 Niterói, Rio de Janeiro, Brazil
| | - Fernanda C. F. Brito
- Laboratory of Experimental Pharmacology (LAFE), Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University (UFF), Room 204-A, 24420-210 Niterói, RJ, Brazil
- Department of Physiology and Pharmacology, Fluminense Federal University (UFF), 24420-210 Niterói, Rio de Janeiro, Brazil
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Portelli M, Baron B. Clinical Presentation of Preeclampsia and the Diagnostic Value of Proteins and Their Methylation Products as Biomarkers in Pregnant Women with Preeclampsia and Their Newborns. J Pregnancy 2018; 2018:2632637. [PMID: 30050697 PMCID: PMC6046127 DOI: 10.1155/2018/2632637] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Accepted: 05/15/2018] [Indexed: 12/11/2022] Open
Abstract
Preeclampsia (PE) is a disorder which affects 1-10% of pregnant women worldwide. It is characterised by hypertension and proteinuria in the later stages of gestation and can lead to maternal and perinatal morbidity and mortality. Other than the delivery of the foetus and the removal of the placenta, to date there are no therapeutic approaches to treat or prevent PE. It is thus only possible to reduce PE-related mortality through early detection, careful monitoring, and treatment of the symptoms. For these reasons the search for noninvasive, blood-borne, or urinary biochemical markers that could be used for the screening, presymptomatic diagnosis, and prediction of the development of PE is of great urgency. So far, a number of biomarkers have been proposed for predicting PE, based on pathophysiological observations, but these have mostly proven to be unreliable and inconsistent between different studies. The clinical presentation of PE and data gathered for the biochemical markers placental growth factor (PlGF), soluble Feline McDonough Sarcoma- (fms-) like tyrosine kinase-1 (sFlt-1), asymmetric dimethylarginine (ADMA), and methyl-lysine is being reviewed with the aim of providing both a clinical and biochemical understanding of how these biomarkers might assist in the diagnosis of PE or indicate its severity.
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Affiliation(s)
- Maria Portelli
- Centre for Molecular Medicine and Biobanking, Faculty of Medicine and Surgery, University of Malta, Msida MSD2080, Malta
| | - Byron Baron
- Centre for Molecular Medicine and Biobanking, Faculty of Medicine and Surgery, University of Malta, Msida MSD2080, Malta
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20
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Fonar G, Polis B, Meirson T, Maltsev A, Elliott E, Samson AO. Intracerebroventricular Administration of L-arginine Improves Spatial Memory Acquisition in Triple Transgenic Mice Via Reduction of Oxidative Stress and Apoptosis. Transl Neurosci 2018; 9:43-53. [PMID: 29876138 PMCID: PMC5984558 DOI: 10.1515/tnsci-2018-0009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 04/01/2018] [Indexed: 12/15/2022] Open
Abstract
Arginine is one of the most versatile semi-essential amino acids. Further to the primary role in protein biosynthesis, arginine is involved in the urea cycle, and it is a precursor of nitric oxide. Arginine deficiency is associated with neurodegenerative diseases such as Parkinson's, Huntington's and Alzheimer's diseases (AD). In this study, we administer arginine intracerebroventricularly in a murine model of AD and evaluate cognitive functions in a set of behavioral tests. In addition, the effect of arginine on synaptic plasticity was tested electrophysiologically by assessment of the hippocampal long-term potentiation (LTP). The effect of arginine on β amyloidosis was tested immunohistochemically. A role of arginine in the prevention of cytotoxicity and apoptosis was evaluated in vitro on PC-12 cells. The results indicate that intracerebroventricular administration of arginine improves spatial memory acquisition in 3xTg-AD mice, however, without significantly reducing intraneuronal β amyloidosis. Arginine shows little or no impact on LTP and does not rescue LTP deterioration induced by Aβ. Nevertheless, arginine possesses neuroprotective and antiapoptotic properties.
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Affiliation(s)
- Gennadiy Fonar
- Faculty of Medicine in the Galilee, Bar Ilan University, Safed, Israel
| | - Baruh Polis
- Faculty of Medicine in the Galilee, Bar Ilan University, Safed, Israel
| | - Tomer Meirson
- Faculty of Medicine in the Galilee, Bar Ilan University, Safed, Israel
| | - Alexander Maltsev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, Russia
| | - Evan Elliott
- Faculty of Medicine in the Galilee, Bar Ilan University, Safed, Israel
| | - Abraham O Samson
- Faculty of Medicine in the Galilee, Bar Ilan University, Safed, Israel
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21
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Shannon OM, Stephan BCM, Minihane AM, Mathers JC, Siervo M. Nitric Oxide Boosting Effects of the Mediterranean Diet: A Potential Mechanism of Action. J Gerontol A Biol Sci Med Sci 2018; 73:902-904. [DOI: 10.1093/gerona/gly087] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 04/16/2018] [Indexed: 02/05/2023] Open
Affiliation(s)
- Oliver M Shannon
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, UK
| | - Blossom C M Stephan
- Institute of Health and Society, Newcastle University, UK
- Institute of Ageing, Newcastle University, UK
| | - Anne-Marie Minihane
- Department of Nutrition and Preventive Medicine, Norwich Medical School, University of East Anglia (UEA), UK
| | - John C Mathers
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, UK
| | - Mario Siervo
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, UK
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22
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Ali-Sisto T, Tolmunen T, Viinamäki H, Mäntyselkä P, Valkonen-Korhonen M, Koivumaa-Honkanen H, Honkalampi K, Ruusunen A, Nandania J, Velagapudi V, Lehto SM. Global arginine bioavailability ratio is decreased in patients with major depressive disorder. J Affect Disord 2018; 229:145-151. [PMID: 29310063 DOI: 10.1016/j.jad.2017.12.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 12/11/2017] [Accepted: 12/24/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND Major depressive disorder (MDD) is characterized by increased oxidative and nitrosative stress. We compared nitric oxide metabolism, i.e., the global arginine bioavailability ratio (GABR) and related serum amino acids, between MDD patients and non-depressed controls, and between remitted and non-remitted MDD patients. METHODS Ninety-nine MDD patients and 253 non-depressed controls, aged 20-71 years, provided background data via questionnaires. Fasting serum samples were analyzed using ultra-performance liquid chromatography coupled to mass spectrometry to determine the serum levels of ornithine, arginine, citrulline, and symmetric and asymmetric dimethylarginine. GABR was calculated as arginine divided by the sum of ornithine plus citrulline. We compared the above measures between: 1) MDD patients and controls, 2) remitted (n=33) and non-remitted (n = 45) MDD patients, and 3) baseline and follow-up within the remitted and non-remitted groups. RESULTS Lower arginine levels (OR 0.98, 95% CI 0.97-0.99) and lower GABR (OR 0.13, 95% CI 0.03-0.50) were associated with the MDD vs. the non-depressed group after adjustments for potential confounders. The remitted group showed a decrease in GABR, arginine, and symmetric dimethylarginine, and an increase in ornithine after the follow-up compared with within-group baseline values. The non-remitted group displayed an increase in arginine and ornithine levels and a decrease in GABR. No significant differences were recorded between the remitted and non-remitted groups. LIMITATIONS The MDD group was not medication-free. CONCLUSIONS Arginine bioavailability may be decreased in MDD. This could impair the production of nitric oxide, and thus add to oxidative stress in the central nervous system.
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Affiliation(s)
- Toni Ali-Sisto
- Institute of Clinical Medicine/Psychiatry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland.
| | - Tommi Tolmunen
- Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, 70029 KYS, Finland
| | - Heimo Viinamäki
- Institute of Clinical Medicine/Psychiatry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, 70029 KYS, Finland
| | - Pekka Mäntyselkä
- Primary Health Care Unit, University of Eastern Finland and Kuopio University Hospital, P.O. Box 1627, 70211 Kuopio, Finland
| | - Minna Valkonen-Korhonen
- Institute of Clinical Medicine/Psychiatry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, 70029 KYS, Finland
| | - Heli Koivumaa-Honkanen
- Institute of Clinical Medicine/Psychiatry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, 70029 KYS, Finland; Departments of Psychiatry, South-Savonia Hospital District, Mikkeli, Finland; Departments of Psychiatry, North Karelia Central Hospital, Joensuu, Finland; Departments of Psychiatry, SOTE, Iisalmi, Finland; Departments of Psychiatry, Lapland Hospital District, Rovaniemi, Finland
| | - Kirsi Honkalampi
- Department of Education and Psychology, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland
| | - Anu Ruusunen
- Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, 70029 KYS, Finland; Deakin University, Geelong, IMPACT Strategic Research Centre, VIC, Australia
| | - Jatin Nandania
- Metabolomics Unit, Institute for Molecular Medicine Finland FIMM, University of Helsinki, P.O. Box 20, 00014, Finland
| | - Vidya Velagapudi
- Metabolomics Unit, Institute for Molecular Medicine Finland FIMM, University of Helsinki, P.O. Box 20, 00014, Finland
| | - Soili M Lehto
- Institute of Clinical Medicine/Psychiatry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, 70029 KYS, Finland; Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, P.O. Box 9, 00014, Finland
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23
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Polis B, Samson AO. Arginase as a Potential Target in the Treatment of Alzheimer’s Disease. ACTA ACUST UNITED AC 2018. [DOI: 10.4236/aad.2018.74009] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Symmetric dimethylarginine (SDMA) outperforms asymmetric dimethylarginine (ADMA) and other methylarginines as predictor of renal and cardiovascular outcome in non-dialysis chronic kidney disease. Clin Res Cardiol 2017; 107:201-213. [DOI: 10.1007/s00392-017-1172-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 10/20/2017] [Indexed: 10/18/2022]
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25
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Antiinflammatory actions of inorganic nitrate stabilize the atherosclerotic plaque. Proc Natl Acad Sci U S A 2017; 114:E550-E559. [PMID: 28057862 DOI: 10.1073/pnas.1613063114] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Reduced bioavailable nitric oxide (NO) plays a key role in the enhanced leukocyte recruitment reflective of systemic inflammation thought to precede and underlie atherosclerotic plaque formation and instability. Recent evidence demonstrates that inorganic nitrate (NO3-) through sequential chemical reduction in vivo provides a source of NO that exerts beneficial effects upon the cardiovascular system, including reductions in inflammatory responses. We tested whether the antiinflammatory effects of inorganic nitrate might prove useful in ameliorating atherosclerotic disease in Apolipoprotein (Apo)E knockout (KO) mice. We show that dietary nitrate treatment, although having no effect upon total plaque area, caused a reduction in macrophage accumulation and an elevation in smooth muscle accumulation within atherosclerotic plaques of ApoE KO mice, suggesting plaque stabilization. We also show that in nitrate-fed mice there is reduced systemic leukocyte rolling and adherence, circulating neutrophil numbers, neutrophil CD11b expression, and myeloperoxidase activity compared with wild-type littermates. Moreover, we show in both the ApoE KO mice and using an acute model of inflammation that this effect upon neutrophils results in consequent reductions in inflammatory monocyte expression that is associated with elevations of the antiinflammatory cytokine interleukin (IL)-10. In summary, we demonstrate that inorganic nitrate suppresses acute and chronic inflammation by targeting neutrophil recruitment and that this effect, at least in part, results in consequent reductions in the inflammatory status of atheromatous plaque, and suggest that this effect may have clinical utility in the prophylaxis of inflammatory atherosclerotic disease.
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Menzel D, Haller H, Wilhelm M, Robenek H. L-Arginine and B vitamins improve endothelial function in subjects with mild to moderate blood pressure elevation. Eur J Nutr 2016; 57:557-568. [PMID: 27817128 PMCID: PMC5845626 DOI: 10.1007/s00394-016-1342-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 10/24/2016] [Indexed: 02/05/2023]
Abstract
Purpose The aim of this trial was to investigate the influence of a dietetic product consisting of a unique combination of l-arginine with the vitamins B6, folic acid and B12 (Telcor® Arginin plus) on endothelial dysfunction. Methods Subjects aged 40–65 years with mild to moderate blood pressure (BP) elevation not treated with anti-hypertensive drugs were randomly assigned to either the dietetic product (n = 40) or a matching placebo (n = 41) for 3 months with open follow-up for a further 3 months. Postprandial change in endothelial function was assessed using the validated reactive hyperaemia index (RHI) at 3 months compared to the study onset (RHI post–pre, visit 3–visit 1; ΔΔRHI). Secondary parameters included BP and plasma homocysteine concentration. Results The primary efficacy analysis revealed superiority of the nutritional intervention over placebo (p = 0.0349) in reducing the deterioration of endothelial function. While in the active group ΔΔRHI increased (0.371 ± 0.122), almost no change could be detected in the placebo group (0.031 ± 0.100), thus demonstrating a significant improvement in vascular function in the intervention group. Moreover, the intervention reduced BP and homocysteine levels. Non-serious adverse events were equally distributed in both groups, and none of the events were assessed as possibly intervention-related by the investigators. Conclusions This trial confirmed the effective and safe use of dietary management with l-arginine in combination with B vitamins. The primary efficacy analysis demonstrated a statistically significant superiority of the combination of l-arginine with B vitamins over placebo in improving and restoring impaired endothelial function and lowering BP in patients with mild to moderate blood pressure elevation.
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Affiliation(s)
| | - Hermann Haller
- Department of Nephrology and Hypertension Medicine, Hannover Medical School, University of Hannover, Hannover, Germany
| | | | - Horst Robenek
- University Clinic Münster, Albert-Schweitzer-Campus 1, Domagkstr. 3, 48149, Münster, Germany.
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Kumar A, Misra S, Kumar P, Sagar R, Prasad K, Pandit AK, Chakravarty K, Kathuria P, Yadav AK. Association between Endothelial nitric oxide synthase G894T gene polymorphism and risk of ischemic stroke in North Indian population: a case-control study. Neurol Res 2016; 38:575-9. [DOI: 10.1080/01616412.2016.1181376] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Amit Kumar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Shubham Misra
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Pradeep Kumar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Ram Sagar
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Kameshwar Prasad
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Awadh Kishor Pandit
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Kamalesh Chakravarty
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Prachi Kathuria
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Arun Kumar Yadav
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
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Baranyi A, Amouzadeh-Ghadikolai O, Rothenhäusler HB, Theokas S, Robier C, Baranyi M, Koppitz M, Reicht G, Hlade P, Meinitzer A. Nitric Oxide-Related Biological Pathways in Patients with Major Depression. PLoS One 2015; 10:e0143397. [PMID: 26581044 PMCID: PMC4651499 DOI: 10.1371/journal.pone.0143397] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 11/04/2015] [Indexed: 11/19/2022] Open
Abstract
Background Major depression is a well-known risk factor for cardiovascular diseases and increased mortality following myocardial infarction. However, biomarkers of depression and increased cardiovascular risk are still missing. The aim of this prospective study was to evaluate, whether nitric-oxide (NO) related factors for endothelial dysfunction, such as global arginine bioavailability, arginase activity, L-arginine/ADMA ratio and the arginine metabolites asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA) might be biomarkers for depression-induced cardiovascular risk. Methods In 71 in-patients with major depression and 48 healthy controls the Global Arginine Bioavailability Ratio (GABR), arginase activity (arginine/ornithine ratio), the L-arginine/ADMA ratio, ADMA, and SDMA were determined by high-pressure liquid chromatography. Psychiatric and laboratory assessments were obtained at baseline at the time of in-patient admittance and at the time of hospital discharge. Results The ADMA concentrations in patients with major depression were significantly elevated and the SDMA concentrations were significantly decreased in comparison with the healthy controls. Even after a first improvement of depression, ADMA and SDMA levels remained nearly unchanged. In addition, after a first improvement of depression at the time of hospital discharge, a significant decrease in arginase activity, an increased L-arginine/ADMA ratio and a trend for increased global arginine bioavailability were observed. Conclusions Our study results are evidence that in patients with major depression ADMA and SDMA might be biomarkers to indicate an increased cardiovascular threat due to depression-triggered NO reduction. GABR, the L-arginine/ADMA ratio and arginase activity might be indicators of therapy success and increased NO production after remission.
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Affiliation(s)
- Andreas Baranyi
- Department of Psychiatry, Medical University of Graz, Graz, Austria
- Institute for International Management Practice at ARU Cambridge, Cambridge, United Kingdom
- * E-mail:
| | | | | | - Simon Theokas
- Department of Psychiatry, Medical University of Graz, Graz, Austria
| | - Christoph Robier
- Hospital of the Brothers of St. John of God, Graz, Austria
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Maria Baranyi
- Department of Psychiatry, Medical University of Graz, Graz, Austria
| | - Michael Koppitz
- Department of Psychiatry, Medical University of Graz, Graz, Austria
| | - Gerhard Reicht
- Hospital of the Brothers of St. John of God, Graz, Austria
| | - Peter Hlade
- Hospital of the Brothers of St. John of God, Graz, Austria
| | - Andreas Meinitzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
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Willeit P, Freitag DF, Laukkanen JA, Chowdhury S, Gobin R, Mayr M, Di Angelantonio E, Chowdhury R. Asymmetric dimethylarginine and cardiovascular risk: systematic review and meta-analysis of 22 prospective studies. J Am Heart Assoc 2015; 4:e001833. [PMID: 26021436 PMCID: PMC4599532 DOI: 10.1161/jaha.115.001833] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 04/20/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Asymmetric dimethylarginine (ADMA) inhibits the production of nitric oxide, a key regulator of the vascular tone, and may be important in the development of cardiovascular disease (CVD). Our aim was to reliably quantify the association of ADMA and its isomer symmetric dimethylarginine (SDMA) with the risk of CVD outcomes in long-term cohort studies. METHODS AND RESULTS Data were collated from 22 prospective studies involving a total of 19 842 participants, which have recorded 2339 CVD, 997 coronary heart disease, and 467 stroke outcomes during a mean follow-up of 7.1 years. In a comparison of individuals in the top with those in the bottom third of baseline ADMA values, the combined risk ratios were 1.42 (95% confidence interval: 1.29 to 1.56) for CVD, 1.39 for coronary heart disease (1.19 to 1.62), and 1.60 for stroke (1.33 to 1.91). Broadly similar results were observed according to participants' baseline disease status (risk ratios for CVD: 1.35 [1.18 to 1.54] in general populations; 1.47 [1.16 to 1.87] in individuals with pre-existing CVD; and 1.52 [1.26 to 1.84] in individuals with pre-existing kidney disease) and by different study characteristics, including geographical location, sample type, assay method, number of incident outcomes, and level of statistical adjustment (all P values>0.05). In contrast, in 8 prospective studies involving 9070 participants and 848 outcomes, the corresponding estimate for SDMA concentration was 1.32 (0.92 to 1.90) for CVD. CONCLUSIONS Available prospective studies suggest associations between circulating ADMA concentration and CVD outcomes under a broad range of circumstances. Further research is needed to better clarify these associations, particularly in large general population studies.
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Affiliation(s)
- Peter Willeit
- Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of CambridgeUnited Kingdom (P.W., D.F.F., R.G., E.D.A., R.C.)
- King’s British Heart Foundation Centre, King’s College LondonUnited Kingdom (P.W., M.M.)
- Department of Neurology, Medical University InnsbruckAustria (P.W.)
| | - Daniel F Freitag
- Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of CambridgeUnited Kingdom (P.W., D.F.F., R.G., E.D.A., R.C.)
| | - Jari A Laukkanen
- Institute of Public Health, School and Clinical Nutrition, University of Eastern FinlandKuopio, Finland (J.A.L.)
| | | | - Reeta Gobin
- Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of CambridgeUnited Kingdom (P.W., D.F.F., R.G., E.D.A., R.C.)
- School of Medicine, University of GuyanaGuyana (R.G.)
| | - Manuel Mayr
- King’s British Heart Foundation Centre, King’s College LondonUnited Kingdom (P.W., M.M.)
| | - Emanuele Di Angelantonio
- Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of CambridgeUnited Kingdom (P.W., D.F.F., R.G., E.D.A., R.C.)
| | - Rajiv Chowdhury
- Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of CambridgeUnited Kingdom (P.W., D.F.F., R.G., E.D.A., R.C.)
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Yang C, Qi ZY, Shao C, Xing WK, Wang Z. Association between three eNOS polymorphisms and intracranial aneurysms risk: a meta-analysis. Medicine (Baltimore) 2015; 94:e452. [PMID: 25634184 PMCID: PMC4602985 DOI: 10.1097/md.0000000000000452] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Endothelial nitric oxide synthase (eNOS) is the catalyst of endothelial nitric oxide (NO) synthesis. Polymorphisms in the eNOS gene may influence the risk of intracranial aneurysm (IA), but the results of existing researches are still inconsistent. Thus, we performed the present meta-analysis to derive a more precise estimation between eNOS polymorphisms (T786C, G894T, 27-bp-variable number of tandem repeat [VNTR]) and IA risk. Case-control studies evaluating the association between the eNOS polymorphisms and IA risk were searched in PubMed, Ovid & Embase, Web of Science, and Chinese Wanfang datasets with the last search up to July 15, 2014. The pooled odds ratios (ORs) for the association between eNOS polymorphisms and IA and their corresponding 95% confidence intervals (CIs) were estimated using the random or fixed-effects model. Finally, 10 studies for T786C polymorphism (1819 cases and 1893 controls), 9 studies for G894T polymorphism (1393 cases and 1508 controls), and 7 studies for 27-bp-VNTR polymorphism (1281 cases and 1406 controls) were included in the meta-analyses. In the overall analysis, no evidence of association between eNOS polymorphisms and susceptibility of IA was found. When subgrouped by race descent, significantly increased risk was detected among Asians for T786C polymorphism (heterozygous comparison of codominant model: OR = 1.294, 95% CI = 1.025-1.634; dominant model: OR = 1.277, 95% CI = 1.019-1.600), but not in Caucasians or the other 2 polymorphisms. Our meta-analysis suggested that T786C polymorphism was associated with increased risk of IA among Asians, whereas G894T and 27-bp-VNTR polymorphisms might have no influence on the susceptibility of IA.
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Affiliation(s)
- Chao Yang
- From the Department of Neurosurgery (CY, ZQ, WX, ZW), The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu; and Department of Neurosurgery (CS), The Second Clinical Medical College of North Sichuan Medical College, Nanchong, Sichuan, China
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Sivri N, Unlu A, Palabiyik O, Budak M, Kacmaz Y, Yalta K, Sipahi T. Endothelial nitric oxide synthase intron 4a/b polymorphism in coronary artery disease in Thrace region of Turkey. BIOTECHNOL BIOTEC EQ 2014; 28:1115-1120. [PMID: 26019598 PMCID: PMC4433908 DOI: 10.1080/13102818.2014.980030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 04/12/2014] [Indexed: 11/30/2022] Open
Abstract
Coronary artery disease (CAD) is one of the frequent cardiovascular mortality causes in the world. Common risk factors explain only about half the risk of CAD. The healthy familial predisposition to CAD, combined with advances in genetic analysis, has led to a number of studies in recent years making an effort to identify the genetic factors that influence the risk. The approach taken by most studies was to examine the association of naturally occurring genetic polymorphisms in candidate genes with risk of or severity of CAD. Endothelial nitric oxide synthase (eNOS) is important for vascular and tissue protection and is found in endothelial cells that encompass the entire vasculature, including the vessels in the heart. Nitric oxide (NO) is produced in a catabolic reaction in the endothelial cells, neurons, glia and macrophages by nitric oxide synthase (NOS) isoenzymes. eNOS is a subgroup of this family of enzymes that catalyses the production of nitric oxide (NO) from L-arginine and oxygen, which leads to vascular relaxation by activating the guanylate cyclase. This finally induces smooth muscle relaxation. The aim of this study was to investigate the allelic frequency and the genotypic distribution of the variable number of tandem repeat 27 (27 VNTR) gene polymorphism in intron 4 of the eNOS (eNOS 4a/b) gene in Thrace region, to compare CAD patients with appropriate healthy controls and to correlate the genetic findings with CAD subtypes. The study group included 281 (153 subjects with CAD and 128 controls) patients. The eNOS polymorphism was identified with a polymerase chain reaction. Genotypes were defined as aa, ab and bb according to the presence of a and b alleles. In this case–control study, we found that there was sensible correlation between eNOS gene intron 4a/b VNTR polymorphism and the risk of CAD in Thrace region of Turkey. However, there was no major difference for the genotype distribution and the allelic frequency among the CAD subtypes. Further studies on the interaction of such genes are needed to clarify the association between eNOS 4a/b polymorphism and CAD patients.
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Affiliation(s)
- N Sivri
- Department of Cardiology, School of Medicine, Trakya University , Edirne , Turkey
| | - A Unlu
- Department of Biophysics, School of Medicine, Trakya University , Edirne , Turkey
| | - O Palabiyik
- Department of Biophysics, School of Medicine, Trakya University , Edirne , Turkey
| | - M Budak
- Department of Biophysics, School of Medicine, Trakya University , Edirne , Turkey
| | - Y Kacmaz
- Department of Cardiology, School of Medicine, Trakya University , Edirne , Turkey
| | - K Yalta
- Department of Cardiology, School of Medicine, Trakya University , Edirne , Turkey
| | - T Sipahi
- Department of Biophysics, School of Medicine, Trakya University , Edirne , Turkey
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Endothelial nitric oxide synthase 894G>T polymorphism and thrombotic disease: A Meta-Analysis of 17 studies involving 8808 subjects. Thromb Res 2014; 134:1057-65. [DOI: 10.1016/j.thromres.2014.07.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 06/20/2014] [Accepted: 07/07/2014] [Indexed: 01/05/2023]
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ADMA/SDMA in elderly subjects with asymptomatic carotid atherosclerosis: values and site-specific association. Int J Mol Sci 2014; 15:6391-8. [PMID: 24739810 PMCID: PMC4013635 DOI: 10.3390/ijms15046391] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 03/02/2014] [Accepted: 03/10/2014] [Indexed: 02/07/2023] Open
Abstract
Asymmetric dimethylarginine (ADMA) is an endogenous nitric oxide synthase (NOS) inhibitor known as a mediator of endothelial dysfunction and atherosclerosis. Circulating ADMA levels are correlated with cardiovascular risk factors such as hypercholesterolemia, arterial hypertension, diabetes mellitus, hyperhomocysteinemia, age and smoking. We assessed the relationship between ADMA values and site-specific association of asymptomatic carotid atherosclerosis (intima-media thickness (CIMT) and plaque) in elderly subjects. One hundred and eighty subjects underwent a complete history and physical examination, determination of serum chemistries and ADMA levels, and carotid ultrasound investigation (CUI). All subjects had no acute or chronic symptoms of carotid atherosclerosis. Statistical analyses showed that high plasma levels of ADMA/SDMA were positively correlated to carotid atherosclerosis (CIMT and plaque) (p < 0.001), with significant site-specific association. Total cholesterol, low density lipoprotein cholesterol, triglycerides and C-reactive protein plasma concentrations were significantly associated with asymptomatic carotid atherosclerosis (p < 0.001). High serum concentrations of ADMA and SDMA were associated with carotid atherosclerotic lesions as measured by CIMT ad plaque and may represent a new marker of asymptomatic carotid atherosclerosis in elderly subjects.
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Asymmetric dimethylarginine responses during interferon-α-induced depression in patients with chronic hepatitis C infection. Psychosom Med 2014; 76:197-207. [PMID: 24608038 DOI: 10.1097/psy.0000000000000042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE The aim of this study was to examine the association of depressive symptoms with asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA). Patients with chronic hepatitis C infection were examined during interferon-α (IFN-α) treatment, which is often associated with treatment-induced depression. The associations between IFN-α-induced depressive symptoms with ADMA and SDMA levels were prospectively investigated until 3 months after treatment. METHODS Psychiatric and biological assessments were obtained at six different time points: before, during (at 1, 3, 6, and 9 months), and after the end of IFN-α treatment. RESULTS During IFN-α treatment, 22 (53.7%) patients fulfilled the criteria for a treatment-related depressive disorder at least once during treatment. The increase in ADMA levels from baseline (depression group: 0.63 [0.08] μM, no depression group: 0.69 [0.08] μM) in response to IFN-α treatment was considerably higher in patients with IFN-α treatment-induced depressive episodes compared with patients without treatment-induced depressive episodes (3 months after the start of treatment: depression group: 0.72 [0.08] μM, no depression group: 0.72 [0.11] μM; ADMA: repeated-measure design analysis of variance [time × depression]: F(5,151) = 2.446, p = .036). The increase in SDMA was not associated with treatment-induced depression. CONCLUSIONS Depression in response to IFN-α treatment is associated with elevated ADMA levels. These findings are relevant to nitric oxide-related biological pathways linking depression to increased cardiovascular disease risk. Future studies are needed to clarify the role of serotonin in these pathways and may lead to preventative treatment strategies.
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Celik A, Balin M, Kobat MA, Erdem K, Baydas A, Bulut M, Altas Y, Aydin S, Aydin S. Deficiency of a new protein associated with cardiac syndrome X; called adropin. Cardiovasc Ther 2013; 31:174-8. [PMID: 23356444 DOI: 10.1111/1755-5922.12025] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The pathophysiology of cardiac syndrome X (CSX) is still unclear, but most patients with CSX have endothelial dysfunction. It has been shown that adropin uniquely effects the regulation of endothelial function. The purpose of the study was to evaluate the role of adropin in CSX. Eighty-six consecutive cardiac syndrome X-diagnosed patients and 86 age-sex matched healthy subjects were enrolled into the study. Serum adropin levels, nitrite/nitrate levels were measured in each subject. The adropin levels were significantly lower in patients with CSX than healthy subjects (1.7 ± 0.8 ng/mL and 3.4 ± 1.8 ng/mL, respectively; P < 0.001). The BMI values of patients with CSX were significantly higher than control subjects (28.1 ± 2.4 kg/m(2) and 26.0 ± 3.7 kg/m(2) , respectively; P < 0.001). Plasma nitrite/nitrate levels were lower in patients with CSX than control subjects (15.9 ± 1.6 μmol/L vs. 25.4 ± 2.8 μmol/L, respectively; P < 0.001), and they have a significantly positive correlation with plasma adropin levels (r = 0.463, P < 0.001). In the multiple linear regression analysis, nitrite/nitrate levels, BMI, and adropin were found to be independent risk factors for CSX. A ROC curve is used to identify the ability of adropin levels to predict the cardiac syndrome X. The area under the ROC curve was 0.854 for adropin levels (P = 0.0001). The sensitivity and specificity values of adropin levels were 90.7 and 70.9%, respectively (cut-off value 2.73). In conclusion, lower serum adropin levels were associated with CSX. Adropin is an independent risk factor for CSX.
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Affiliation(s)
- Ahmet Celik
- Department of Cardiology, Elazig Education and Research Hospital, Elazig, Turkey.
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Dorniak-Wall T, Grivell RM, Dekker GA, Hague W, Dodd JM. The role of L-arginine in the prevention and treatment of pre-eclampsia: a systematic review of randomised trials. J Hum Hypertens 2013; 28:230-5. [PMID: 24172291 DOI: 10.1038/jhh.2013.100] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 09/09/2013] [Indexed: 12/27/2022]
Abstract
Pre-eclampsia is a significant health issue in pregnancy, complicating between 2-8% of pregnancies. L-arginine is an important mediator of vasodilation with a potential preventative role in pregnancy related hypertensive diseases. We aimed to systematically review randomised trials in the literature assessing the role of L-arginine in prevention and treatment of pre-eclampsia. We searched the Cochrane Controlled Trials Register, PUBMED, and the Australian and International Clinical Trials Registry, to identify randomised trials involving pregnant women where L-arginine was administered for pre-eclampsia to improve maternal and infant health outcomes. We identified eight randomised trials, seven of which were included. The methodological quality was fair, with a combined sample size of 884 women. For women at risk of pre-eclampsia, L-arginine was associated with a reduction in pre-eclampsia (RR: 0.34, 95% CI: 0.21-0.55), when compared with placebo and a reduction in risk of preterm birth (RR: 0.48 and 95% CI: 0.28 to 0.81). For women with established hypertensive disease, L-arginine was associated with a reduction in pre-eclampsia (RR: 0.21; 95% CI: 0.05-0.98). L-arginine may have a role in the prevention and/or treatment of pre-eclampsia. Further well-designed and adequately powered trials are warranted, both in women at risk of pre-eclampsia and in women with established disease.
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Affiliation(s)
- T Dorniak-Wall
- The University of Adelaide, Robinson Institute and Discipline of Obstetrics & Gynaecology, Adelaide, South Australia, Australia
| | - R M Grivell
- 1] The University of Adelaide, Robinson Institute and Discipline of Obstetrics & Gynaecology, Adelaide, South Australia, Australia [2] The Women's and Children's Hospital, Department of Perinatal Medicine, North Adelaide, South Australia, Australia
| | - G A Dekker
- 1] The University of Adelaide, Robinson Institute and Discipline of Obstetrics & Gynaecology, Adelaide, South Australia, Australia [2] The Lyell McEwin Hospital, Department of Obstetrics & Gynaecology, Elizabeth, South Australia, Australia
| | - W Hague
- 1] The University of Adelaide, Robinson Institute and Discipline of Obstetrics & Gynaecology, Adelaide, South Australia, Australia [2] The Women's and Children's Hospital, Department of Perinatal Medicine, North Adelaide, South Australia, Australia
| | - J M Dodd
- 1] The University of Adelaide, Robinson Institute and Discipline of Obstetrics & Gynaecology, Adelaide, South Australia, Australia [2] The Women's and Children's Hospital, Department of Perinatal Medicine, North Adelaide, South Australia, Australia
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Niu PP, Yang G, Zheng BK, Guo ZN, Jin H, Yang Y. Relationship between endothelial nitric oxide synthase gene polymorphisms and ischemic stroke: a meta-analysis. Acta Neurol Scand 2013; 128:202-12. [PMID: 23560937 DOI: 10.1111/ane.12120] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/05/2013] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Previous studies examining whether polymorphisms (G894T, 4b/a, and T786C) in the endothelial nitric oxide synthase (eNOS) gene are associated with ischemic stroke have yielded conflicting results. We performed a meta-analysis to investigate the potential association between these three eNOS gene polymorphisms and ischemic stroke risk. MATERIALS AND METHODS We searched databases until April 30, 2012 and used fixed or random effects models to estimate the pooled odds ratios (ORs). RESULTS We analyzed 34 case-control data sets from 33 publications involving 5261/5823 cases/controls for G894T, 4295/4682 for 4b/a, and 2698/3254 for T786C polymorphisms. For Asian populations, all models showed significantly increased risk of ischemic stroke for the G894T (dominant model: OR = 1.58; 95% CI, 1.30-1.91; P = 0.000) and 4b/a polymorphisms (dominant model: OR = 1.46; 95% CI, 1.25-1.71; P = 0.000), even after Bonferroni correction (because 0.000 < 0.017). In white populations, the aa genotype seemed to be protective for ischemic stroke, as indicated by the recessive model (OR = 0.44; 95% CI, 0.22-0.87; P = 0.019). In Asian populations, the T786C polymorphism was significantly associated with ischemic stroke, as found using the dominant (OR = 1.17; 95% CI, 1.02-1.34; P = 0.025) and additive models (OR = 1.18; 95% CI, 1.05-1.33; P = 0.006). CONCLUSIONS Our comprehensive meta-analysis ascertains that the G894T, 4b/a, and T786C polymorphisms are associated with ischemic stroke risk in Asians. A possible contrasting role of the 4b/a polymorphism in ischemic stroke was indicated in white populations.
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Affiliation(s)
- P.-P. Niu
- Department of Neurology; The First Hospital of Jilin University; Changchun; China
| | - G. Yang
- Department of Geriatrics Medicine; The Affiliated Hospital to Changchun University of Chinese Medicine; Changchun; China
| | - B.-K. Zheng
- Department of Neonatology; The First Hospital of Jilin University; Changchun; China
| | - Z.-N. Guo
- Department of Neurology; The First Hospital of Jilin University; Changchun; China
| | - H. Jin
- Department of Neurology; The First Hospital of Jilin University; Changchun; China
| | - Y. Yang
- Department of Neurology; The First Hospital of Jilin University; Changchun; China
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Abstract
Hypertension is a leading cause of morbidity and mortality worldwide. Individuals with hypertension are at increased risk of stroke, heart disease and kidney failure. Although the etiology of essential hypertension has a genetic component, lifestyle factors such as diet play an important role. Reducing dietary salt is effective in lowering blood pressure in salt-sensitive individuals. Insulin resistance and altered glucose metabolism are common features of hypertension in humans and animal models, with or without salt sensitivity. Altered glucose metabolism leads to increased formation of advanced glycation end products. Insulin resistance is also linked to oxidative stress, and alterations in the nitric oxide pathway and renin angiotensin system. A diet rich in protein containing the semiessential amino acid, arginine, and arginine treatment, lowers blood pressure in humans and in animal models. This may be due to the ability of arginine to improve insulin resistance, decrease advanced glycation end products formation, increase nitric oxide, and decrease levels of angiotensin II and oxidative stress, with improved endothelial cell function and decreased peripheral vascular resistance. The Dietary Approaches to Stop Hypertension (DASH) study demonstrated that the DASH diet, rich in vegetables, fruits and low-fat dairy products; low in fat; and including whole grains, poultry, fish and nuts, lowered blood pressures even more than a typical North American diet with similar reduced sodium content. The DASH diet is rich in protein; the blood pressure-lowering effect of the DASH diet may be due to its higher arginine-containing protein, higher antioxidants and low salt content.
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Affiliation(s)
- Sudesh Vasdev
- Discipline of Medicine, Faculty of Medicine, Health Sciences Centre, Memorial University, St John's, Newfoundland
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Li N, Worthmann H, Deb M, Chen S, Weissenborn K. Nitric oxide (NO) and asymmetric dimethylarginine (ADMA): their pathophysiological role and involvement in intracerebral hemorrhage. Neurol Res 2012; 33:541-8. [PMID: 21669125 DOI: 10.1179/016164111x13007856084403] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
OBJECTIVE Nitric oxide (NO) has a variety of functions in physiological systems, particularly in the vasculature and the central nervous system. Currently, the imbalance of the pathway involving nitric oxide, nitric oxide synthase, and asymmetric dimethylarginine (NO-NOS-ADMA) is increasingly discussed in connection with endothelial dysfunction. Knowledge about the role of this pathway in intracerebral hemorrhage (ICH), which represents the most devastating stroke subtype, is increasing but still sparse. This article aims to review the current knowledge about the role and metabolism of NO and ADMA. It will also address the role of the NO-NOS-ADMA pathway in ICH and delineate some questions that should be addressed by future studies. METHODS A literature search regarding the data about NO, NOS, and ADMA and its role in ICH was conducted in PubMed. RESULTS Experimental data from cell culture and animal models indicate that, after the occurrence of ICH, neuronal and inducible nitric oxide synthases (nNOS and iNOS) are both overexpressed and uncoupled through the induction of blood compound metabolites, including thrombin and inflammatory mediators. ADMA, the most potent endogenous inhibitor of NOS, is also overproduced following dysregulation of its metabolizing enzymes. Dysfunction of the NO-NOS-ADMA pathway results in cell death, blood-brain barrier (BBB) disruption, and brain edema via different pathological mechanisms. However, the available data from clinical studies are still rare and partially contradictory. CONCLUSION Experimental data suggest an important role for the NO-NOS-ADMA pathway for secondary injury after ICH. Since the literature shows contradictory results, further studies are needed to address current confusion.
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Affiliation(s)
- Na Li
- Department of Neurology, Hannover Medical School, Germany.
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Akoglu H, Agbaht K, Piskinpasa S, Falay MY, Dede F, Ozet G, Odabas AR. High frequency of aspirin resistance in patients with nephrotic syndrome. Nephrol Dial Transplant 2011; 27:1460-6. [DOI: 10.1093/ndt/gfr476] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Sibal L, Agarwal SC, Home PD, Boger RH. The Role of Asymmetric Dimethylarginine (ADMA) in Endothelial Dysfunction and Cardiovascular Disease. Curr Cardiol Rev 2011; 6:82-90. [PMID: 21532773 PMCID: PMC2892080 DOI: 10.2174/157340310791162659] [Citation(s) in RCA: 296] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2009] [Revised: 10/14/2009] [Accepted: 10/25/2009] [Indexed: 02/07/2023] Open
Abstract
Endothelium plays a crucial role in the maintenance of vascular tone and structure. Endothelial dysfunction is known to precede overt coronary artery disease. A number of cardiovascular risk factors, as well as metabolic diseases and systemic or local inflammation cause endothelial dysfunction. Nitric oxide (NO) is one of the major endothelium derived vaso-active substances whose role is of prime importance in maintaining endothelial homeostasis. Low levels of NO are associated with impaired endothelial function. Asymmetric dimethylarginine (ADMA), an analogue of L-arginine, is a naturally occurring product of metabolism found in human circulation. Elevated levels of ADMA inhibit NO synthesis and therefore impair endothelial function and thus promote atherosclerosis. ADMA levels are increased in people with hypercholesterolemia, atherosclerosis, hypertension, chronic heart failure, diabetes mellitus and chronic renal failure. A number of studies have reported ADMA as a novel risk marker of cardiovascular disease. Increased levels of ADMA have been shown to be the strongest risk predictor, beyond traditional risk factors, of cardiovascular events and all-cause and cardiovascular mortality in people with coronary artery disease. Interventions such as treatment with L-arginine have been shown to improve endothelium-mediated vasodilatation in people with high ADMA levels. However the clinical utility of modifying circulating ADMA levels remains uncertain.
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Affiliation(s)
- Latika Sibal
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
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Saleh AI, Abdel Maksoud SM, El-Maraghy SA, Gad MZ. Protective effect of L-arginine in experimentally induced myocardial ischemia: comparison with aspirin. J Cardiovasc Pharmacol Ther 2010; 16:53-62. [PMID: 20938038 DOI: 10.1177/1074248410378506] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Coronary artery diseases including myocardial ischemia (MI) remain one of the leading causes of death worldwide. This study was designed to compare the protective effect of L-arginine versus aspirin from the biochemical changes associated with MI injury. EXPERIMENTAL DESIGN Four groups of male New Zealand white rabbits were investigated. Normal group (n = 8) rabbits were fed standard chow pellets, untreated MI group (n = 16), where hypercholesterolemia was induced by feeding the animals with a diet containing 2% cholesterol for 28 days, L-arginine group (n = 12) rabbits were fed a 2% cholesterol-enriched diet in conjunction with L-arginine (2.25 g %) in drinking water for 28 days, and aspirin group (n = 12) rabbits were fed 2% cholesterol-enriched diet in conjunction with aspirin administered orally (0.7 mg/kg per d) for 28 days. After 28 days, MI was induced in all groups, except the normal group, by a single subcutaneous (sc) injection of isoproterenol hydrochloride (0.2 mg/kg body weight [bw]). Animals were sacrificed 6 hours later. RESULTS Our results showed that L-arginine was more effective than aspirin in reducing platelet aggregation, reducing low-density lipoprotein (LDL) oxidizability, preventing aortic intimal thickening, and maintaining histological architecture of the myocardium. Both drugs, however, had similar positive effects on plasma fibrinogen levels and on the prevention of myocardial release of cardiac troponin I and creatine kinase-MB. The effect on hypercholesterolemia was insignificant for both drugs. Aspirin was more effective than L-arginine in prolonging prothrombin time. CONCLUSION L-arginine supplementation represents a potentially novel nutritional strategy for preventing and treating coronary artery diseases especially in cases of aspirin resistance and/or hypersensitivity.
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Affiliation(s)
- Alaaeldin I Saleh
- Biochemistry Department, Faculty of Pharmacy, German University in Cairo, New Cairo, Egypt
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Lim JS, Kwon HM. Risk of "silent stroke" in patients older than 60 years: risk assessment and clinical perspectives. Clin Interv Aging 2010; 5:239-51. [PMID: 20852671 PMCID: PMC2938031 DOI: 10.2147/cia.s7382] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Indexed: 01/21/2023] Open
Abstract
With the increasing size of the elderly population and evolving imaging technology, silent brain infarction (SBI) has garnered attention from both the public and the physicians. Over 20% of the elderly exhibit SBI, and the prevalence of SBI increases steadily with age, ie, 30%–40% in those older than 70 years. Well-known cardiovascular risk factors such as hypertension has been identified as a risk factor of SBI (odds ratio [OR] = 3.47) Besides this, blood pressure (BP) reactivity to mental stress, morning BP surges, and orthostatic BP changes have been demonstrated to contribute to the presence of SBI. Further, a metabolic syndrome not only as a whole syndrome (OR =2.18) but also as individual components could have an influence on SBI. Increased C-reactive protein and interleukin-6, coronary artery disease, body mass index, and alcohol consumption have also been associated with SBI. The ORs and possible mechanisms have been discussed in this article. Overt stroke, dementia, depression, and aspiration pneumonia were all associated with SBI. (overt stroke: hazard ratio [HR] =1.9, 95% confidence interval [CI]: 1.2–2.8; dementia: HR =2.26, 95% CI: 1.09–4.70). We also looked into their close relationship with SBI in this review.
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Affiliation(s)
- Jae-Sung Lim
- Department of Neurology, Armed Forces Seoul Hospital, Seoul, Republic of Korea
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Bae J, Kim IJ, Hong SH, Sung JH, Lim SW, Cha DH, Cho YW, Oh D, Kim NK. Association of endothelial nitric oxide synthase polymorphisms with coronary artery disease in Korean individuals with or without diabetes mellitus. Exp Ther Med 2010; 1:719-724. [PMID: 22993595 DOI: 10.3892/etm_00000111] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Accepted: 05/04/2010] [Indexed: 11/06/2022] Open
Abstract
Polymorphisms of the endothelial nitric oxide synthase (eNOS) gene have been implicated in various diseases, but their roles as risk factors in type 2 diabetes mellitus (T2DM) with regard to coronary artery disease (CAD) are largely unknown. Therefore, we investigated the association of the genotypes and haplotypes of eNOS polymorphisms in CAD with T2DM. A case-control study was performed to evaluate the genotypes and haplotypes of the eNOS polymorphisms (-786T>C, 4a4b and 894G>T) in 192 CAD patients and 196 controls. The same population was also re-organized upon the status of T2DM. The genotypes of eNOS -786T>C, 4a4b and 894G>T polymorphisms were determined by polymerase chain reaction-restriction fragment length polymorphism. We found that eNOS -786TC+CC and 4a4b+4a4a genotypes were significantly prevalent in the diabetic controls and the diabetic CAD patients compared to the non-diabetic controls or non-diabetic CAD patients, respectively. The frequency of the -786C-4a-894G haplotype was significantly greater in the diabetic CAD patients (p=0.001) and diabetic controls (p=0.023) compared to the non-diabetic controls, whereas the haplotype of -786T-4b-894G was less prevalent in the diabetic CAD patients compared to the non-diabetic controls (p=0.018). Significant associations of the genotypes and the haplotypes were consistently observed in the T2DM group compared to non-DM group, regardless of CAD status. Our finding suggests that the eNOS -786T>C and 4a4b polymorphisms and the -786C-4a-894G haplotype are risk factors for T2DM, whereas the haplotype of -786T-4b-894G has a protective effect against the development of T2DM.
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Affiliation(s)
- Jeehyeon Bae
- Institute for Clinical Research, ; Department of Biomedical Science, CHA University, Seongnam
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Vignini A, D'Angelo M, Nanetti L, Camilloni MA, Cester AM, Faloia E, Salvolini E, Mazzanti L. Anorexia nervosa: a role for L-arginine supplementation in cardiovascular risk factors? Int J Eat Disord 2010; 43:464-71. [PMID: 19544555 DOI: 10.1002/eat.20709] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE The aim of the present study was to evaluate the effects of a short-term oral L-arginine treatment on platelet NO production, intracellular calcium concentration, iNOS and eNOS expression, in AN patients. METHOD Forty outpatients belonging to restricting subtype and 40 normal participants age and sex matched were enrolled in the study. RESULTS NO production was significantly elevated in the platelets from AN patients compared with controls while [Ca(2+)](i) was significantly decreased in patients with respect to controls. Western blot analysis demonstrated that iNOS isoform was more pronounced in the cell lysates from AN patients than controls. After supplementation with L-arginine, both NO production and [Ca(2+)](i) seem to return to control levels, suggesting a probable recovery of their metabolisms. The same was found after western blot analysis of NOS expression. DISCUSSION The results here proposed can be considered highly indicative of a positive effect of L-arginine supplementation on platelet NO production in AN patients.
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Affiliation(s)
- Arianna Vignini
- Department of Biochemistry, Biology and Genetics, School of Medicine, Polytechnic University of Marche, Ancona, Italy.
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Abstract
Increased oxidative stress impairs endothelial function and is thought to mediate vascular disease. Several pathological conditions increase the production of reactive oxygen species (ROS) in the vascular wall, including hypercholesterolemia, diabetes, and hypertension. These conditions are associated with endothelial dysfunction and cardiovascular disease. Thus, overall vascular function is dependent upon the balance of oxidant and antioxidant mechanisms, which determines endothelial function. Endothelial function is usually defined as nitric oxide (NO) production and/or bioavailability. Because ROS can interact and inactivate NO, vascular oxidative stress can lead to decrease NO bioavailability. This results in endothelial dysfunction and increased risk of cardiovascular diseases. Several pharmacological approaches have been used to improve endothelial function and decrease oxidative stress. These include treatment modalities that augment the antioxidant defense mechanisms, increase NO production, and inhibit ROS-generating enzymes. This review provides an overview of the relationship between endothelial function and oxidative stress.
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Affiliation(s)
- Hisakazu Ogita
- Vascular Medicine Research, Department of Medicine, Brigham, & Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
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Abstract
In the past, many have avoided nuts because of their high fat content. The Dietary Approaches to Stop Hypertension (DASH) diet, however, recommends regular consumption of this food along with seeds and dried beans (4-5 servings per week) as part of a diet to control hypertension. Nuts are nutrient-dense and most of their fat is unsaturated. They are also perhaps the best natural source of vitamin E and are relatively concentrated repositories of dietary fiber, magnesium, potassium, and arginine, the dietary precursor of nitric oxide. Human feeding studies have demonstrated reductions of 8-12% in low-density lipoprotein (LDL) cholesterol when almonds and walnuts are substituted for more traditional fats. Other studies show that macadamias and hazelnuts appear at least as beneficial as fats in commonly recommended diets. Whether consuming modest quantities of nuts daily may promote weight gain is not known with certainty, but preliminary data suggest that this is unlikely. Four of the best and largest cohort studies in nutritional epidemiology have now reported that eating nuts frequently is associated with a decreased risk of coronary heart disease of the order of 30-50%. The findings are very consistent in subgroup analyses and unlikely to be due to confounding. Possible mechanisms include reduction in LDL cholesterol, the antioxidant actions of vitamin E, and the effects on the endothelium and platelet function of higher levels of nitric oxide. Although nuts may account for a relatively small percentage of dietary calories, the potential interacting effects of these factors on disease risk may be considerable.
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Affiliation(s)
- G E Fraser
- Center for Health Research, School of Public Health, Loma Linda University, CA 92350, USA
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Mendes-Ribeiro AC, Moss MB, Siqueira MA, Moraes TL, Ellory JC, Mann GE, Brunini TM. Dengue fever activates the L-arginine-nitric oxide pathway: an explanation for reduced aggregation of human platelets. Clin Exp Pharmacol Physiol 2008; 35:1143-6. [PMID: 18505438 DOI: 10.1111/j.1440-1681.2008.04970.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In patients with Dengue fever, a viral inflammatory syndrome, haemorrhage is a significant pathological feature, yet the underlying mechanisms remain unclear. Nitric oxide (NO) is an important regulator of platelet function, inhibiting aggregation, recruitment and adhesion to the vascular endothelium. We have investigated whether changes in the activity of the L-arginine-NO pathway in human platelets may account for increased bleeding in patients with Dengue fever. A total of 16 patients with Dengue fever and 18 age-matched healthy volunteers participated in the study. Collagen induced platelet aggregation in a dose-dependent manner in both Dengue patients and controls, but the degree of platelet aggregation was significantly reduced in the patient group. Elevated rates of L-arginine transport in Dengue fever patients were associated with enhanced NO synthase activity and elevated plasma fibrinogen levels. The present study provides the first evidence that Dengue fever is associated with increased L-arginine transport and NO generation and reduced platelet aggregation.
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Rajendran S, Chirkov YY. Platelet hyperaggregability: impaired responsiveness to nitric oxide ("platelet NO resistance") as a therapeutic target. Cardiovasc Drugs Ther 2008; 22:193-203. [PMID: 18327704 DOI: 10.1007/s10557-008-6098-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2007] [Accepted: 02/07/2008] [Indexed: 11/25/2022]
Abstract
Platelet hyperaggregability and associated thrombosis have been documented in a number of cardiovascular disease states. While one of the current mainstays of anti-thrombotic treatment (i.e. aspirin, clopidogrel, glycoprotein IIb/IIIa antagonists) has been directed at reducing platelet activation and aggregation, it is apparent that there are limitations to the effectiveness of these therapies. Nitric oxide (NO) plays an important role in platelet physiology. The ability of NO to regulate cyclic guanosine-3,'5'-monophosphate (cGMP), via activation of soluble guanylate cyclase, is the principal mechanism of negative control over platelet activity. NO is not only of the endothelial source, it is also released from activated platelets, providing a negative feedback. Studies in patients with symptomatic ischemia, chronic heart failure, diabetes and various risk factors for cardiovascular disease have demonstrated that platelets from these subjects exhibit reduced responsiveness to the anti-aggregating efficacy of NO: a phenomenon termed "platelet NO resistance". It constitutes an impaired physiological response to endogenous NO (endothelium-derived relaxing factor or EDRF), and as such may contribute to the increased risk of ischemic events. NO resistance also accounts for reduced pharmaco-activity of exogenous NO donors, e.g. organic nitrates. Platelet NO resistance results largely from a combination of "scavenging" of NO by superoxide anion radical and inactivation of soluble guanylate cyclase. NO resistance has both diagnostic and prognostic implications. The current review examines the association of platelet NO resistance with pathological hyperaggregability and discusses potential therapeutic strategies targeting this abnormality.
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Affiliation(s)
- Sharmalar Rajendran
- Cardiology Unit, The Basil Hetzel Institute, The Queen Elizabeth Hospital, Discipline of Medicine, University of Adelaide, Adelaide, South Australia, Australia
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