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Amirkhizi F, Khalese-Ranjbar B, Mansouri E, Hamedi-Shahraki S, Asghari S. Correlations of selenium and selenoprotein P with asymmetric dimethylarginine and lipid profile in patients with polycystic ovary syndrome. J Trace Elem Med Biol 2023; 75:127101. [PMID: 36395675 DOI: 10.1016/j.jtemb.2022.127101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/25/2022] [Accepted: 11/08/2022] [Indexed: 11/13/2022]
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is associated with an increased risk of cardiovascular diseases (CVD). Accumulating evidence has suggested that selenium (Se) is of importance for optimal function of the cardiovascular system. This study aimed to investigate the associations of selenium and selenoprotein P (SePP) with asymmetric dimethylarginine (ADMA) and lipid profile in women with PCOS. METHODS In this cross-sectional study, 125 females aged 18-45 years diagnosed with PCOS were recruited. An interviewer-administered questionnaire was applied to gather the relevant demographic characteristics, detailed clinical information, and lifestyle habits of participants. Fasting blood samples were obtained to measure biochemical parameters. Serum concentrations of total testosterone, sex hormone-binding globulin (SHBG), ADMA, and lipid profiles as well as anthropometric measurements were assessed across tertiles of serum Se and SePP concentrations. RESULTS There was a positive correlation between serum Se and SePP concentrations (r = 0.434, p < 0.001). Serum Se level was inversely correlated with ADMA (r = -0.21, p = 0.025) and TG (r = -0.17, p = 0.041) concentrations. There were also inverse correlations between SePP and ADMA (r = -0.34, p < 0.001), TG (r = -0.21, p = 0.019), and oxidized low density lipoprotein (ox-LDL) (r = -0.25, p = 0.007) levels. No significant relationship was found between serum Se and SePP concentrations with total cholesterol, low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), apolipoprotein-A1 (Apo-A1), apolipoprotein-B (Apo-B100), total testosterone, SHBG, and free androgen index as well as anthropometric parameters (All p > 0.05). CONCLUSION The present study found that Se and SePP levels were inversely correlated with ADMA and TG concentrations as well as ox-LDL levels.
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Affiliation(s)
- Farshad Amirkhizi
- Department of Nutrition, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
| | - Banafshe Khalese-Ranjbar
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Elahe Mansouri
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudabeh Hamedi-Shahraki
- Department of Epidemiology and Biostatistics, Faculty of Public Health, Zabol University of Medical Sciences, Zabol, Iran
| | - Somayyeh Asghari
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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Marsden AJ, Riley DRJ, Birkett S, Rodriguez-Barucg Q, Guinn BA, Carroll S, Ingle L, Sathyapalan T, Beltran-Alvarez P. Love is in the hair: arginine methylation of human hair proteins as novel cardiovascular biomarkers. Amino Acids 2022; 54:591-600. [PMID: 34181092 PMCID: PMC9117359 DOI: 10.1007/s00726-021-03024-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 06/17/2021] [Indexed: 12/25/2022]
Abstract
Cardiovascular disease is the major cause of death worldwide. Extensive cardiovascular biomarkers are available using blood tests but very few, if any, investigations have described non-invasive tests for cardiovascular biomarkers based on readily available hair samples. Here we show, first, that human hair proteins are post-translationally modified by arginine methylation (ArgMe). Using western blot, proteomic data mining and mass spectrometry, we identify several ArgMe events in hair proteins and we show that keratin-83 is extensively modified by ArgMe in the human hair. Second, using a preliminary cohort (n = 18) of heterogenous healthy donors, we show that the levels of protein ArgMe in hair correlate with serum concentrations of a well-established cardiovascular biomarker, asymmetric dimethylarginine (ADMA). Compared to blood collection, hair sampling is cheaper, simpler, requires minimal training and carries less health and safety and ethical risks. For these reasons, developing the potential of hair protein ArgMe as clinically useful cardiovascular biomarkers through further research could be useful in future prevention and diagnosis of cardiovascular disease.
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Affiliation(s)
| | - David R J Riley
- Department of Biomedical Sciences, University of Hull, Cottingham Rd, Hull, HU6 7RX, UK
| | - Stefan Birkett
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
- School of Sport and Health Sciences, University of Central Lancashire, Preston, UK
| | | | - Barbara-Ann Guinn
- Department of Biomedical Sciences, University of Hull, Cottingham Rd, Hull, HU6 7RX, UK
| | - Sean Carroll
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
| | - Lee Ingle
- Department of Sport, Health and Exercise Science, University of Hull, Hull, UK
| | - Thozhukat Sathyapalan
- Academic Endocrinology, Diabetes and Metabolism, Hull York Medical School, University of Hull, Hull, UK
| | - Pedro Beltran-Alvarez
- Department of Biomedical Sciences, University of Hull, Cottingham Rd, Hull, HU6 7RX, UK.
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3
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Manuck TA, Eaves LA, Rager JE, Fry RC. Mid-pregnancy maternal blood nitric oxide-related gene and miRNA expression are associated with preterm birth. Epigenomics 2021; 13:667-682. [PMID: 33890487 DOI: 10.2217/epi-2020-0346] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: The nitric oxide (NO) pathway modulates inflammation and may influence birth timing. Patients & methods: Case-control analysis of 136 pregnant women with RNA obtained <28 weeks; n = 212 mRNAs and n = 108 miRNAs in the NO pathway were evaluated. NO-pathway mRNA and miRNA transcript counts in women delivering preterm versus at term were compared, miRNA-mRNA expression levels correlated and prediction models generated. Results: Fourteen genes were differentially expressed in women delivering <37 weeks; 13/14 were also differentially expressed in those delivering <34 weeks (q <0.10) versus term births. Multiple miRNA-mRNA pairs were correlated. Models with gene expression better predicted prematurity than models with only clinical or nongenomic predictors. Conclusion: Maternal blood NO pathway-related mRNA and miRNA expression is associated with prematurity.
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Affiliation(s)
- Tracy A Manuck
- Department of Obstetrics & Gynecology, Division of Maternal Fetal Medicine, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA.,Institute for Environmental Health Solutions, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA
| | - Lauren A Eaves
- Department of Environmental Sciences & Engineering, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA
| | - Julia E Rager
- Institute for Environmental Health Solutions, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA.,Department of Environmental Sciences & Engineering, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA
| | - Rebecca C Fry
- Institute for Environmental Health Solutions, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA.,Department of Environmental Sciences & Engineering, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA
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4
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Rashidi BH, Mohammad Hosseinzadeh F, Alipoor E, Asghari S, Yekaninejad MS, Hosseinzadeh-Attar MJ. Effects of Selenium Supplementation on Asymmetric Dimethylarginine and Cardiometabolic Risk Factors in Patients with Polycystic Ovary Syndrome. Biol Trace Elem Res 2020; 196:430-437. [PMID: 31667685 DOI: 10.1007/s12011-019-01954-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/23/2019] [Indexed: 12/26/2022]
Abstract
Polycystic ovary syndrome (PCOS) is characterized by various reproductive and cardiometabolic disorders. Asymmetric dimethylarginine (ADMA) is associated with cardiovascular, metabolic, and hormonal status. Selenium, a micronutrient with antioxidant properties, could affect multiple physiological pathways. This study aimed to investigate the effect of selenium supplementation on ADMA, cardiometabolic risk factors, and hormonal status in women with PCOS. In this randomized, double-blind, placebo-controlled clinical trial, 66 women with PCOS, aged 18-45 years, were randomly assigned to receive either 200 μg/day selenium or placebo, for 12 weeks. Circulating concentrations of ADMA, testosterone, sex hormone-binding globulin (SHBG), lipid profiles, and glycemic parameters were assessed at baseline and following supplementation. ADMA concentration decreased significantly compared to baseline values (85.14 ± 75 to 56.4 ± 38.64 ng/l, p = 0.02) in the selenium group. This change was marginally significant compared with the placebo group (28.74 ± 68.63 vs. - 1.77 ± 52.88 ng/l, p = 0.056). Serum testosterone levels declined significantly in the intervention compared to the placebo group (0.01 ± 0.17 vs. - 0.08 ± 0.18 ng/ml, p = 0.038). Pre- to post-Apo-B100/Apo-A1 ratio declined considerably in the intervention group (0.72 ± 0.16 to 0.65 ± 0.16, p = 0.003). No further differences were observed in SHBG, lipid profiles, Apo-A1, Apo-B100, Apo-B100/Apo-A1 ratio, and glycemic control between the two groups at the end of the study. Selenium supplementation for 12 weeks had beneficial effects on reduction of circulating ADMA and total testosterone levels in women with PCOS. No significant improvements were seen in other cardiometabolic risk factors. The effects of selenium supplementation on hormonal, reproductive, and cardiometabolic disorders, considering the potential mediating role of ADMA, should be further investigated.
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Affiliation(s)
- Batool Hossein Rashidi
- Vali-E-Asr Reproductive Health Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Mohammad Hosseinzadeh
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, No#44, Hojjatdoust St., Naderi St., Keshavarz Blvd, Tehran, 141556117, Iran
| | - Elham Alipoor
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Somayyeh Asghari
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, No#44, Hojjatdoust St., Naderi St., Keshavarz Blvd, Tehran, 141556117, Iran
| | - Mir Saeed Yekaninejad
- Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Javad Hosseinzadeh-Attar
- Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, No#44, Hojjatdoust St., Naderi St., Keshavarz Blvd, Tehran, 141556117, Iran.
- Cardiac Primary Prevention Research Center (CPPRC), Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.
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5
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Hulin JA, Gubareva EA, Jarzebska N, Rodionov RN, Mangoni AA, Tommasi S. Inhibition of Dimethylarginine Dimethylaminohydrolase (DDAH) Enzymes as an Emerging Therapeutic Strategy to Target Angiogenesis and Vasculogenic Mimicry in Cancer. Front Oncol 2020; 9:1455. [PMID: 31993367 PMCID: PMC6962312 DOI: 10.3389/fonc.2019.01455] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/05/2019] [Indexed: 01/01/2023] Open
Abstract
The small free radical gas nitric oxide (NO) plays a key role in various physiological and pathological processes through enhancement of endothelial cell survival and proliferation. In particular, NO has emerged as a molecule of interest in carcinogenesis and tumor progression due to its crucial role in various cancer-related events including cell invasion, metastasis, and angiogenesis. The dimethylarginine dimethylaminohydrolase (DDAH) family of enzymes metabolize the endogenous nitric oxide synthase (NOS) inhibitors, asymmetric dimethylarginine (ADMA) and monomethyl arginine (L-NMMA), and are thus key for maintaining homeostatic control of NO. Dysregulation of the DDAH/ADMA/NO pathway resulting in increased local NO availability often promotes tumor growth, angiogenesis, and vasculogenic mimicry. Recent literature has demonstrated increased DDAH expression in tumors of different origins and has also suggested a potential ADMA-independent role for DDAH enzymes in addition to their well-studied ADMA-mediated influence on NO. Inhibition of DDAH expression and/or activity in cell culture models and in vivo studies has indicated the potential therapeutic benefit of this pathway through inhibition of both angiogenesis and vasculogenic mimicry, and strategies for manipulating DDAH function in cancer are currently being actively pursued by several research groups. This review will thus provide a timely discussion on the expression, regulation, and function of DDAH enzymes in regard to angiogenesis and vasculogenic mimicry, and will offer insight into the therapeutic potential of DDAH inhibition in cancer based on preclinical studies.
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Affiliation(s)
- Julie-Ann Hulin
- Clinical Pharmacology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Ekaterina A Gubareva
- N.N. Petrov National Medical Research Center of Oncology, Saint Petersburg, Russia
| | - Natalia Jarzebska
- Division of Angiology, Department of Internal Medicine III, University Center for Vascular Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Roman N Rodionov
- Division of Angiology, Department of Internal Medicine III, University Center for Vascular Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Arduino A Mangoni
- Clinical Pharmacology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Sara Tommasi
- Clinical Pharmacology, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
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6
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Fulton MD, Brown T, Zheng YG. The Biological Axis of Protein Arginine Methylation and Asymmetric Dimethylarginine. Int J Mol Sci 2019; 20:ijms20133322. [PMID: 31284549 PMCID: PMC6651691 DOI: 10.3390/ijms20133322] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/04/2019] [Accepted: 07/04/2019] [Indexed: 12/20/2022] Open
Abstract
Protein post-translational modifications (PTMs) in eukaryotic cells play important roles in the regulation of functionalities of the proteome and in the tempo-spatial control of cellular processes. Most PTMs enact their regulatory functions by affecting the biochemical properties of substrate proteins such as altering structural conformation, protein-protein interaction, and protein-nucleic acid interaction. Amid various PTMs, arginine methylation is widespread in all eukaryotic organisms, from yeasts to humans. Arginine methylation in many situations can drastically or subtly affect the interactions of substrate proteins with their partnering proteins or nucleic acids, thus impacting major cellular programs. Recently, arginine methylation has become an important regulator of the formation of membrane-less organelles inside cells, a phenomenon of liquid-liquid phase separation (LLPS), through altering π-cation interactions. Another unique feature of arginine methylation lies in its impact on cellular physiology through its downstream amino acid product, asymmetric dimethylarginine (ADMA). Accumulation of ADMA in cells and in the circulating bloodstream is connected with endothelial dysfunction and a variety of syndromes of cardiovascular diseases. Herein, we review the current knowledge and understanding of protein arginine methylation in regards to its canonical function in direct protein regulation, as well as the biological axis of protein arginine methylation and ADMA biology.
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Affiliation(s)
- Melody D Fulton
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA 30602, USA
| | - Tyler Brown
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA 30602, USA
| | - Y George Zheng
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA 30602, USA.
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7
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Asymmetric Dimethylarginine Predicts One-year Recurrent Cardiovascular Events: Potential Biomarker of "Toxin Syndrome" in Coronary Heart Disease. Chin J Integr Med 2019; 25:327-333. [PMID: 31065970 DOI: 10.1007/s11655-019-2701-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/05/2018] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To examine the prognostic value of serum levels of asymmetric dimethylarginine (ADMA) in patients with stable coronary heart disease (CHD) thus explore a potential biomarker of "toxin syndrome" in CHD. METHODS In this prospective nested case-control study, 36 of 1,503 Chinese patients with stable CHD experienced at least 1 recurrent cardiovascular event (RCE) during 1-year follow-up. Serum levels of ADMA at the start of follow-up were compared between these 36 cases and 36 controls which matched to cases in terms of gender, age, history of hypertension, and myocardial infarction. RESULTS Based on the crude model, subjects in the 2 highest ADMA quartiles showed significantly higher risk of developing RCE than those in the lowest ADMA quartile [odds ratio (OR) 4.09, 95% confidence interval (CI) 1.01 to 16.58; OR 6.76, 95% CI 1.57 to 29.07]. This association was also observed in the case-mix model (OR 5.51, 95% CI 1.23 to 24.61; OR 7.83, 95% CI 1.68 to 36.41) and multivariable model (OR 6.64, 95% CI 1.40 to 31.49: OR 13.14, 95% CI 2.28 to 75.71) after adjusting for confounders. The multivariable model which combined ADMA and high-sensitivity C-reactive protein (hsCRP) showed better predictive power with areas under the receiver operator characteristic curves (0.779) than the model of either ADMA (0.694) or hsCRP (0.636). CONCLUSION Serum ADMA level may be a potential biomarker of "toxin syndrome" in CHD which shows favorable prognostic value in predicting 1-year RCE in patients with stable CHD. [The registration number is ChiCTR-PRNRC-07000012].
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8
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Hu LL, Zhang KQ, Tian T, Zhang H, Fu Q. Probucol improves erectile function via Activation of Nrf2 and coordinates the HO-1 / DDAH / PPAR-γ/ eNOS pathways in streptozotocin-induced diabetic rats. Biochem Biophys Res Commun 2018; 507:9-14. [PMID: 30454888 DOI: 10.1016/j.bbrc.2018.10.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 10/05/2018] [Indexed: 01/20/2023]
Abstract
BACKGROUND Diabetic erectile dysfunction (DMED) is mainly attributed to oxidative stress, and Nrf2 plays an important role in cellular antioxidation and regulates NO production in the vascular endothelium. Probucol maintains endothelial function through its antioxidant activity. This study investigated the efficacy and mechanism of probucol in improving erectile function in streptozotocin-induced diabetic rats. METHODS In our study, thirty 12-week-old Sprague-Dawley male rats were fasted for 12 h. All rats received a 1-time injection of intraperitoneal streptozotocin(60 mg/kg) or vehicle. After 72 h, STZ-treated rats (with random blood glucose concentrations consistently greater than 16.7 mmol/L) were considered diabetic. The diabetic rats were randomly assigned into 2 groups and treated with daily gavage feedings of probucol at doses of 0 and 500 mg/kg for 12 weeks. A positive control group underwent intraperitoneal injection of normal saline followed by daily gavage of saline solution. Erectile function was assessed by electrical stimulation of the cavernous nerves with real-time intracavernous pressure measurement. After euthanasia, penile tissue was investigated using immunohistochemistry, Western blot, and ELISA to assess the proteins of Nrf2/HO-1/DDAH/PPAR-γ/eNOS pathways. RESULTS After treatment, the rats in the probucol group presented significantly improved erectile function (P < 0.05) than that of the diabetic group without probucol treatment (DM). Also, protein expression of Nrf2, DDAH, PPAR-γ, HO-1 and eNOS was significantly higher than that of the DM group (P < 0.05). CGMP concentrations and SOD concentrations of probucol-treated rats were higher than those of DM group (P < 0.05). The MDA levels and ADMA levels were significantly lower than those of DM group rats (P < 0.05). CONCLUSION Probucol can improve erectile function via activation of Nrf2, which coordinates the HO-1/DDAH/PPAR-γ/eNOS pathways in streptozotocin-induced diabetic rats.
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Affiliation(s)
- Liang-Liang Hu
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, 250021, People's Republic of China; Department of Urology, Shandong Zaozhuang Municipal Hospital, Zaozhuang, 277000, People's Republic of China
| | - Ke-Qin Zhang
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, 250021, People's Republic of China
| | - Tao Tian
- Department of Urology, Shandong Zaozhuang Municipal Hospital, Zaozhuang, 277000, People's Republic of China
| | - Hui Zhang
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, 250021, People's Republic of China
| | - Qiang Fu
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, 250021, People's Republic of China.
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Ames PRJ, Bucci T, Merashli M, Amaral M, Arcaro A, Gentile F, Nourooz-Zadeh J, DelgadoAlves J. Oxidative/nitrative stress in the pathogenesis of systemic sclerosis: are antioxidants beneficial? Free Radic Res 2018; 52:1063-1082. [PMID: 30226391 DOI: 10.1080/10715762.2018.1525712] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Systemic sclerosis (SSc) is a multisystem autoimmune disease: characterised from the clinical side by progressive vasculopathy and fibrosis of the skin and different organs and from the biochemical side by fibroblast deregulation with excessive production of collagen and increased expression of nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX4). The latter contributes to an overproduction of reactive oxygen species that through an autocrine loop maintains NOX4 in a state of activation. Reactive oxygen and nitrogen species are implicated in the origin and perpetuation of several clinical manifestations of SSc having vascular damage in common; attempts to dampen oxidative and nitrative stress through different agents with antioxidant properties have not translated into a sustained clinical benefit. Objective of this narrative review is to describe the origin and clinical implications of oxidative and nitrative stress in SSc, with particular focus on the central role of NOX4 and its interactions, to re-evaluate the antioxidant approaches so far used to limit disease progression, to appraise the complexity of antioxidant treatment and to touch on novel pathways elements of which may represent specific treatment targets in the not so distant future.
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Affiliation(s)
- Paul R J Ames
- a Immune Response and Vascular Disease Unit , CEDOC, Nova University , Lisboa , Portugal.,b Department of Haematology , Dumfries Royal Infirmary , Dumfries , UK
| | - Tommaso Bucci
- c Division of Allergy and Clinical Immunology, Department of Internal Medicine , University of Salerno , Baronissi , Italy
| | - Mira Merashli
- d Department of Rheumatology , American University of Beirut , Beirut , Lebanon
| | - Marta Amaral
- a Immune Response and Vascular Disease Unit , CEDOC, Nova University , Lisboa , Portugal
| | - Alessia Arcaro
- e Department of Medicine & Health Sciences , Universita' del Molise , Campobasso , Italy
| | - Fabrizio Gentile
- e Department of Medicine & Health Sciences , Universita' del Molise , Campobasso , Italy
| | - Jaffar Nourooz-Zadeh
- f Nephrology & Kidney Transplantation Research Center , Urmia University of Medical Sciences , Urmia , Iran
| | - Jose DelgadoAlves
- a Immune Response and Vascular Disease Unit , CEDOC, Nova University , Lisboa , Portugal.,g Immunomediated Systemic Diseases Unit, Medicine 4 , Hospital Fernando Fonseca , Amadora , Portugal
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10
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Systemic concentrations of asymmetric dimethylarginine (ADMA) in chronic obstructive pulmonary disease (COPD): state of the art. Amino Acids 2018; 50:1169-1176. [PMID: 29951704 DOI: 10.1007/s00726-018-2606-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 06/20/2018] [Indexed: 01/08/2023]
Abstract
Experimental evidence suggests that oxidative stress (OS) may increase the activity of arginine methylating enzymes that produce the endogenous nitric oxide synthase inhibitor asymmetric dimethylarginine (ADMA). In addition, it is well documented that OS can significantly decrease the synthesis and/or activity of ADMA degrading enzymes, thus causing ADMA accumulation in biological fluids. Recent reports have focused on circulating methylated arginine concentrations in chronic obstructive pulmonary disease, a disease characterized by a significant increase in OS. This review discusses the results of these studies and the opportunities for further research in this area.
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11
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Chen D, Zhang KQ, Li B, Sun DQ, Zhang H, Fu Q. Epigallocatechin-3-gallate ameliorates erectile function in aged rats via regulation of PRMT1/DDAH/ADMA/NOS metabolism pathway. Asian J Androl 2018; 19:291-297. [PMID: 27080477 PMCID: PMC5427783 DOI: 10.4103/1008-682x.178486] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Aging-related ED is predominantly attributed to neurovascular dysfunction mediated by NO suppression and increased oxidative stress in penis. The alterations of protein arginine methyltransferases 1 (PRMT1)/dimethylarginine dimethylaminohydrolase (DDAH)/asymmetrical dimethylarginine (ADMA)/NO synthase (NOS) pathway regulate NO production in the vascular endothelium. Epigallocatechin-3-gallate (EGCG) is one of the most abundant and antioxidative ingredients isolated from green tea. In the present study, 40 Sprague-Dawley rats were randomly distributed into four groups: one young rat group and three aged rat groups treated with daily gavage feedings of EGCG at doses of 0, 10 mg kg−1, and 100 mg kg−1 for 12 weeks, respectively. Erectile function was assessed by electrical stimulation of the cavernous nerves with intracavernous pressure (ICP) measurement. After euthanasia, penile tissue was investigated using Western blot and ELISA to assess the PRMT1/DDAH/ADMA/NOS metabolism pathway. Superoxide dismutase (SOD) and malondialdehyde (MDA) levels were detected by colorimetry. We also evaluated smooth muscle contents. The ratio of maximal ICP and mean systemic arterial pressure (MAP) was markedly higher in EGCG-treated aged rats than in untreated aged rats. We found that DDAH1 and DDAH2 were expressed in cavernosal tissue, and they were downregulated in corpora of aged rats. The administration of EGCG upregulated the expression and activity of DDAH. In contrast, EGCG treatment downregulated the expression of PRMT1 and ADMA content. Moreover, EGCG-treated rats showed an improvement in smooth muscle expression, the ratio of smooth muscle cell/collagen fibril, SOD activity, and MDA levels when compared with untreated aged rats.
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Affiliation(s)
- Dong Chen
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Ke-Qin Zhang
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Bo Li
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Ding-Qi Sun
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Hui Zhang
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Qiang Fu
- Department of Urology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
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12
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Ye F, Wang J, Meng W, Qian J, Jin M. Proteomic investigation of effects of hydroxysafflor yellow A in oxidized low-density lipoprotein-induced endothelial injury. Sci Rep 2017; 7:17981. [PMID: 29269856 PMCID: PMC5740064 DOI: 10.1038/s41598-017-18069-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 12/01/2017] [Indexed: 02/08/2023] Open
Abstract
Oxidized low-density lipoprotein (ox-LDL)-induced vascular endothelial damage is a key event in early atherosclerosis. Safflower has been used to treat atherosclerotic heart disease in China for many years, but its molecular basis remains unclear. Hydroxysafflor yellow A (HSYA) is the main active ingredient of aqueous safflower extract. We identified the proteins involved in HSYA activity against ox-LDL-induced endothelial injury using isobaric tags for relative and absolute quantification-coupled two-dimensional liquid chromatography–tandem mass spectrometry. HSYA (1, 5, or 25 μM) alleviated ox-LDL-induced endothelial damage in a dose-dependent manner. We quantitated approximately 2700 protein species, of which 77 were differentially expressed following HSYA treatment. Most protein changes were related to structural molecules, metabolic enzymes, and proteins involved in signal transduction. Several differentially expressed proteins were further validated by western blot analysis. We also analysed the role of the mitochondrial membranous voltage-dependent anion-selective channel protein 2 (VDAC2) in HSYA treatment using small interfering RNA. VDAC2 functioned as a downstream anti-apoptosis effector during HSYA treatment of ox-LDL-induced endothelial impairment. These results further our understanding of the mechanisms responsible for the effects of HSYA.
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Affiliation(s)
- Feng Ye
- Department of Pharmacology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing, 100029, China
| | - Jianhe Wang
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Wei Meng
- School of Biological Science, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Jingru Qian
- School of Biological Science, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Ming Jin
- Department of Pharmacology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing, 100029, China.
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Zinellu A, Fois AG, Sotgia S, Sotgiu E, Zinellu E, Bifulco F, Mangoni AA, Pirina P, Carru C. Arginines Plasma Concentration and Oxidative Stress in Mild to Moderate COPD. PLoS One 2016; 11:e0160237. [PMID: 27479314 PMCID: PMC4968788 DOI: 10.1371/journal.pone.0160237] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 07/15/2016] [Indexed: 11/17/2022] Open
Abstract
Background Elevated plasma concentrations of the endogenous nitric oxide synthase (NOS) inhibitor asymmetric dimethylarginine (ADMA) have been observed in respiratory conditions such as asthma and cystic fibrosis. Since oxidative stress has been shown to increase the activity of arginine methylating enzymes, hence increased ADMA synthesis, and to reduce ADMA degrading enzymes, hence increased ADMA concentrations, we assessed methylated arginines concentrations in chronic obstructive pulmonary disease (COPD), a disease characterized by increased oxidative stress. Methods Plasma arginine, ADMA and symmetric dimethylarginine (SDMA), oxidative stress markers (thiobarbituric acid reactive substances, TBARS, and plasma proteins SH, PSH) and antioxidants (taurine and paraoxonase 1, PON1, activity) were measured in 43 COPD patients with mild (n = 29) or moderate (n = 14) disease and 43 age- and sex-matched controls. Results TBARS significantly increased with COPD presence and severity (median 2.93 vs 3.18 vs 3.64 μmol/L, respectively in controls, mild and moderate group, p<0.0001 by ANOVA) whereas PSH decreased (6.69±1.15 vs 6.04±0.85 vs 5.33±0.96 μmol/gr prot, p<0.0001 by ANOVA). Increased ADMA/arginine ratio, primarily due to reduced arginine concentrations, was also observed with COPD presence and severity (median 0.0067 vs 0.0075 vs 0.0100, p<0.0001 by ANOVA). In multiple logistic regression analysis, only TBARS (OR 0.44, 95% CI 0.25–0.77; p = 0.0045) and ADMA/Arginine ratio (OR 1.72, 95% CI 2.27–13.05; p = 0.02) were independently associated with COPD severity. Conclusion COPD presence and severity are associated with increased oxidative stress and alterations in arginine metabolism. The reduced arginine concentrations in COPD may offer a new target for therapeutic interventions increasing arginine availability.
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Affiliation(s)
- Angelo Zinellu
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | | | - Salvatore Sotgia
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Elisabetta Sotgiu
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Elisabetta Zinellu
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | - Fabiana Bifulco
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | - Arduino A Mangoni
- Department of Clinical Pharmacology, School of Medicine, Flinders University, Adelaide, Australia
| | - Pietro Pirina
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | - Ciriaco Carru
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy.,Quality Control Unit, University Hospital Sassari (AOU), Sassari, Italy
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14
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Inhibitors of the Hydrolytic Enzyme Dimethylarginine Dimethylaminohydrolase (DDAH): Discovery, Synthesis and Development. Molecules 2016; 21:molecules21050615. [PMID: 27187323 PMCID: PMC6273216 DOI: 10.3390/molecules21050615] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 04/19/2016] [Accepted: 05/04/2016] [Indexed: 02/07/2023] Open
Abstract
Dimethylarginine dimethylaminohydrolase (DDAH) is a highly conserved hydrolytic enzyme found in numerous species, including bacteria, rodents, and humans. In humans, the DDAH-1 isoform is known to metabolize endogenous asymmetric dimethylarginine (ADMA) and monomethyl arginine (l-NMMA), with ADMA proposed to be a putative marker of cardiovascular disease. Current literature reports identify the DDAH family of enzymes as a potential therapeutic target in the regulation of nitric oxide (NO) production, mediated via its biochemical interaction with the nitric oxide synthase (NOS) family of enzymes. Increased DDAH expression and NO production have been linked to multiple pathological conditions, specifically, cancer, neurodegenerative disorders, and septic shock. As such, the discovery, chemical synthesis, and development of DDAH inhibitors as potential drug candidates represent a growing field of interest. This review article summarizes the current knowledge on DDAH inhibition and the derived pharmacokinetic parameters of the main DDAH inhibitors reported in the literature. Furthermore, current methods of development and chemical synthetic pathways are discussed.
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Abstract
PURPOSE OF REVIEW Probucol is a potent antioxidative drug that has been used for prevention and treatment of atherosclerotic cardiovascular diseases and xanthoma. Probucol has been used as a lipid-lowering drug for a long time especially in Japan, although Western countries quitted its use because of the reduction in serum HDL-cholesterol (HDL-C). This review highlights both basic and clinical studies that provide new insights into the pleiotropic effects of probucol. RECENT FINDINGS Recently, the mechanisms for the pharmacologic actions of probucol have been elucidated at the molecular level with a special focus on HDL metabolism and its functions. Probucol enhances plasma cholesteryl ester transfer protein activity and hepatic scavenger receptor class B type I, causing a decrease in HDL-C. It also accelerates the antioxidative function of HDL via increase in paraoxonase 1 activity. Recent retrospective analyses of probucol-treated patients with heterozygous familial hypercholesterolemia and those after coronary revascularization demonstrated a strong beneficial effect of probucol on secondary prevention of cardiovascular events and mortality. SUMMARY Probucol has pleiotropic and beneficial therapeutic effects on cardiovascular system. Although statins are effective for lowering LDL-cholesterol (LDL-C) and reducing coronary heart disease risk, probucol should be considered as an option in case statins are not effective.
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Affiliation(s)
- Shizuya Yamashita
- aDepartment of Community Medicine bDepartment of Cardiovascular Medicine, Osaka University Graduate School of Medicine cSumitomo Hospital, Osaka, Japan
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16
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Morales Y, Nitzel DV, Price OM, Gui S, Li J, Qu J, Hevel JM. Redox Control of Protein Arginine Methyltransferase 1 (PRMT1) Activity. J Biol Chem 2015; 290:14915-26. [PMID: 25911106 DOI: 10.1074/jbc.m115.651380] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Indexed: 12/16/2022] Open
Abstract
Elevated levels of asymmetric dimethylarginine (ADMA) correlate with risk factors for cardiovascular disease. ADMA is generated by the catabolism of proteins methylated on arginine residues by protein arginine methyltransferases (PRMTs) and is degraded by dimethylarginine dimethylaminohydrolase. Reports have shown that dimethylarginine dimethylaminohydrolase activity is down-regulated and PRMT1 protein expression is up-regulated under oxidative stress conditions, leading many to conclude that ADMA accumulation occurs via increased synthesis by PRMTs and decreased degradation. However, we now report that the methyltransferase activity of PRMT1, the major PRMT isoform in humans, is impaired under oxidative conditions. Oxidized PRMT1 displays decreased activity, which can be rescued by reduction. This oxidation event involves one or more cysteine residues that become oxidized to sulfenic acid (-SOH). We demonstrate a hydrogen peroxide concentration-dependent inhibition of PRMT1 activity that is readily reversed under physiological H2O2 concentrations. Our results challenge the unilateral view that increased PRMT1 expression necessarily results in increased ADMA synthesis and demonstrate that enzymatic activity can be regulated in a redox-sensitive manner.
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Affiliation(s)
- Yalemi Morales
- From the Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322
| | - Damon V Nitzel
- From the Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322
| | - Owen M Price
- From the Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322
| | - Shanying Gui
- From the Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322
| | - Jun Li
- the Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260, and the New York State Center of Excellence in Bioinformatics and Life Sciences, Buffalo, New York 14203
| | - Jun Qu
- the Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York 14260, and the New York State Center of Excellence in Bioinformatics and Life Sciences, Buffalo, New York 14203
| | - Joan M Hevel
- From the Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322,
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17
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Xuan C, Chang FJ, Liu XC, Bai XY, Liao XL, He GW, Ou JS. Endothelial nitric oxide synthase enhancer for protection of endothelial function from asymmetric dimethylarginine-induced injury in human internal thoracic artery. J Thorac Cardiovasc Surg 2012; 144:697-703. [PMID: 22336756 DOI: 10.1016/j.jtcvs.2012.01.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 12/01/2011] [Accepted: 01/04/2012] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Endogenous nitric oxide synthase inhibitor asymmetric dimethylarginine is a cardiovascular risk factor that is elevated in patients with coronary artery disease. We hypothesized that novel endothelial nitric oxide synthase enhancer AVE3085 might improve the endothelial function altered by asymmetric dimethylarginine in the human internal thoracic artery. METHODS Cumulative concentration-relaxation curves to acetylcholine (-11 to -5 log mol/L) were established in left internal thoracic artery rings (n = 65) from 27 patients undergoing coronary artery bypass grafting in precontraction induced by U46619 (-8 log mol/L) in the absence or presence of asymmetric dimethylarginine (100 μmol/L) or AVE3085 (30 μmol/L). Protein expressions of endothelial nitric oxide synthase and levels of superoxide anion production were detected. RESULTS Maximal relaxation induced by acetylcholine was significantly attenuated by asymmetric dimethylarginine (12.7% ± 2.3% vs 35.3% ± 5.0% in control; P < .05) and significantly restored by AVE3085 (23.4% ± 2.8%; P < .05). AVE3085 also markedly restored endothelial nitric oxide synthase expression (0.29 ± 0.008; P = .012) reduced by asymmetric dimethylarginine (0.05 ± 0.04 vs 0.36 ± 0.03 in control; P = .014). Increased superoxide anion production by asymmetric dimethylarginine (2.97 ± 0.25 vs 0.51 ± 0.10 relative light units/[s/mg] in control; P < .05) was inhibited by AVE3805 (0.62 ± 0.104 relative light units/[s/mg]; P < .05). CONCLUSIONS AVE3085 may restore endothelium-dependent relaxation reduced by asymmetric dimethylarginine through upregulation of endothelial nitric oxide synthase expression and inhibition of production of superoxide anion in human internal thoracic artery. These findings provide new insights into endothelial protection of coronary bypass grafting vessels to improve long-term patency of grafts.
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Affiliation(s)
- Chao Xuan
- TEDA International Cardiovascular Hospital, Medical College, Nankai University, Tianjin, China
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18
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Antioxidant effects of resveratrol and other stilbene derivatives on oxidative stress and NO bioavailability: Potential benefits to cardiovascular diseases. Biochimie 2012; 94:269-76. [DOI: 10.1016/j.biochi.2011.11.001] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 11/06/2011] [Indexed: 11/20/2022]
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19
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Leiper J, Nandi M. The therapeutic potential of targeting endogenous inhibitors of nitric oxide synthesis. Nat Rev Drug Discov 2011; 10:277-91. [DOI: 10.1038/nrd3358] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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20
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Tain YL, Huang LT. Asymmetric Dimethylarginine: Clinical Applications in Pediatric Medicine. J Formos Med Assoc 2011; 110:70-7. [DOI: 10.1016/s0929-6646(11)60012-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 05/31/2010] [Accepted: 06/17/2010] [Indexed: 10/18/2022] Open
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21
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Puchau B, Zulet MA, Urtiaga G, Navarro-Blasco I, Martínez JA. Asymmetric dimethylarginine association with antioxidants intake in healthy young adults: a role as an indicator of metabolic syndrome features. Metabolism 2009; 58:1483-8. [PMID: 19586644 DOI: 10.1016/j.metabol.2009.04.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Accepted: 04/10/2009] [Indexed: 12/30/2022]
Abstract
The purpose of this study was to evaluate the potential associations between serum asymmetric dimethylarginine (ADMA) and several anthropometric, biochemical, and lifestyle features in healthy young adults, emphasizing on the putative effects of the antioxidant intake on ADMA concentrations. Anthropometric and blood pressure measurements as well as lifestyle features and antioxidant intake were analyzed in 93 healthy young adults aged 18 to 34 years. Fasting blood samples were collected for the measurement of glucose, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triacylglycerols, and ADMA concentrations, as well as erythrocyte glutathione peroxidase activity. Nail samples were collected for the analysis of selenium and zinc concentrations. Values of body mass index (P = .004), waist circumference (P = .008), waist-to-height ratio (P = .046), systolic blood pressure (P < .001), serum glucose (P < .001), and nail selenium (P = .004) and zinc (P = .018) were significantly different between subjects with serum ADMA higher and lower than the median (cutoff, 458 nmol/L). Furthermore, ADMA showed a positive association with several adiposity markers such as body weight (P < .001), body mass index (P < .001), waist circumference (P = .006), waist-to-height ratio (P = .020), body fat mass (P = .001), systolic blood pressure (P = .001), and serum glucose (P < .001), whereas erythrocyte glutathione peroxidase activity (P = .021) and nail selenium (P = .040) and zinc values (P = .013) were statistically significant negative predictors of ADMA concentrations. In conclusion, ADMA seems to be related with selenium and zinc status and several anthropometric and biochemical measurements linked to metabolic syndrome in apparently healthy young adults. These findings support a role for antioxidant/trace element intake in the modulation of ADMA, whose assessment may be a marker of metabolic syndrome manifestations.
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Affiliation(s)
- Blanca Puchau
- Department of Nutrition and Food Sciences, Physiology and Toxicology, University of Navarra, 31008 Pamplona, Spain
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22
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Ito E, Obayashi S, Nagai A, Imamura M, Azuma H. Regulation of myometrial contractivity during pregnancy in the rat: potential role for DDAH. Mol Hum Reprod 2009; 15:507-12. [PMID: 19528264 DOI: 10.1093/molehr/gap041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
There has been little information demonstrating the roles of dimethylarginine dimethylaminohydrolase (DDAH), which is the hydrolyzing enzyme of endogenous nitric oxide synthase (NOS) inhibitors and, in turn, modulates the intracellular concentrations of NOS inhibitors, in the myometrium during the course of pregnancy. Therefore, the present experiments were designed to investigate whether or not DDAH activity, protein and mRNA expression levels are altered during gestation of the rat and, if altered, those changes reflect on the levels of endogenous inhibitors and endothelin-1 (ET-1), and NO-dependent cyclic GMP generation in the myometrium. The up-regulated changes in DDAH activity, DDAH-2 protein and DDAH-2 mRNA expression at mid-gestation were accompanied by the reduced monomethylarginine and asymmetric dimethylarginine as NOS inhibitors, and ET-1 levels, and by the enhanced NO-dependent cyclic GMP production. At term gestation, on the other hand, down-regulated changes in DDAH activity, DDAH-2 protein and DDAH-2 mRNA expression were accompanied by the increased NOS inhibitors and ET-1 levels, and decreased NO-dependent cyclic GMP generation. These results suggest that alterations in DDAH/NOS inhibitors/NO-dependent cyclic GMP/ET-1 pathway are possibly involved in maintaining myometrial quiescence during gestation and controlling delivery at term.
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Affiliation(s)
- Emiko Ito
- Department of Biosystem Regulation, Institute of Biomaterials and Bioengineering, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Wadham C, Mangoni AA. Dimethylarginine dimethylaminohydrolase regulation: a novel therapeutic target in cardiovascular disease. Expert Opin Drug Metab Toxicol 2009; 5:303-19. [PMID: 19331593 DOI: 10.1517/17425250902785172] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Asymmetric dimethylarginine (ADMA), an endogenous methylated form of the amino acid L-arginine, inhibits the activity of the enzyme endothelial nitric oxide synthase, with consequent reduced synthesis of nitric oxide. ADMA is metabolised to L-citrulline and dimethylamine by the enzyme dimethylarginine dimethylaminohydrolase (DDAH). The modulation of DDAH activity and expression plays a pivotal role in regulating intracellular ADMA concentrations, with important effects on vascular homeostasis. For example, impairment in DDAH activity, resulting in elevated ADMA concentrations and reduced nitric oxide synthesis, can promote the onset and progression of atherosclerosis in experimental models. This review discusses the current role of ADMA and DDAH in vascular health and disease, the techniques used to assess DDAH activity and expression, and the results of recent studies on pharmacological and biological agents modulating DDAH activity and expression. Suggestions for future basic and clinical research directions are also discussed.
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Affiliation(s)
- Carol Wadham
- Flinders University, Flinders Medical Centre, Department of Clinical Pharmacology, Adelaide, Australia
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Thomson MJ, Puntmann V, Kaski JC. Atherosclerosis and oxidant stress: the end of the road for antioxidant vitamin treatment? Cardiovasc Drugs Ther 2007; 21:195-210. [PMID: 17484034 DOI: 10.1007/s10557-007-6027-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Extensive experimental data have revealed a central role for oxidative stress in atherogenesis and suggested a potential role for 'antioxidant' treatment in cardiovascular disease (CVD) [1-11]. Experimental data, however, have not translated into clinical benefit: most antioxidant vitamin trials have failed to reduce cardiovascular morbidity and mortality [12]. Moreover, recent clinical trials have suggested that mono-therapy with certain antioxidant vitamins like vitamin E may, in fact, be detrimental [13]. As a result of the disappointing outcome of 'antioxidant' vitamin trials, some authors have questioned both the utility of 'antioxidant' treatment in CVD and the supposedly central role of oxidative stress in atherogenesis [14-19]. Other investigators, however, sustain that the beneficial effects of lipid lowering and anti-hypertensive treatment are at least, in part, due to their 'antioxidant' properties, in addition to their specific pharmacological properties [20, 21]. Oxidant stress plays a pivotal role in atherogenesis, however, the clinical promise of antioxidant vitamins has failed to translate into clinical benefit. Increasing evidence suggests that more rigorous clinical trial designs are necessary to effectively divulge antioxidant utility and that a multifaceted antioxidant approach to atherosclerosis may yield the most clinical reward. This article reviews currently available evidence on the role of oxidant stress in atherosclerosis, analyzes the results of large anti-oxidant trials, and suggests ways to investigate the true role of antioxidant treatment in the clinical setting.
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Affiliation(s)
- Mika J Thomson
- Cardiac and Vascular Sciences, St George's, University of London, London, UK
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Palm F, Onozato ML, Luo Z, Wilcox CS. Dimethylarginine dimethylaminohydrolase (DDAH): expression, regulation, and function in the cardiovascular and renal systems. Am J Physiol Heart Circ Physiol 2007; 293:H3227-45. [PMID: 17933965 DOI: 10.1152/ajpheart.00998.2007] [Citation(s) in RCA: 244] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Asymmetric (N(G),N(G))-dimethylarginine (ADMA) inhibits nitric oxide (NO) synthases (NOS). ADMA is a risk factor for endothelial dysfunction, cardiovascular mortality, and progression of chronic kidney disease. Two isoforms of dimethylarginine dimethylaminohydrolase (DDAH) metabolize ADMA. DDAH-1 is the predominant isoform in the proximal tubules of the kidney and in the liver. These organs extract ADMA from the circulation. DDAH-2 is the predominant isoform in the vasculature, where it is found in endothelial cells adjacent to the cell membrane and in intracellular vesicles and in vascular smooth muscle cells among the myofibrils and the nuclear envelope. In vivo gene silencing of DDAH-1 in the rat and DDAH +/- mice both have increased circulating ADMA, whereas gene silencing of DDAH-2 reduces vascular NO generation and endothelium-derived relaxation factor responses. DDAH-2 also is expressed in the kidney in the macula densa and distal nephron. Angiotensin type 1 receptor activation in kidneys reduces the expression of DDAH-1 but increases the expression of DDAH-2. This rapidly evolving evidence of isoform-specific distribution and regulation of DDAH expression in the kidney and blood vessels provides potential mechanisms for nephron site-specific regulation of NO production. In this review, the recent advances in the regulation and function of DDAH enzymes, their roles in the regulation of NO generation, and their possible contribution to endothelial dysfunction in patients with cardiovascular and kidney diseases are discussed.
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Affiliation(s)
- Fredrik Palm
- Division of Nephrology and Hypertension, Georgetown University, 3800 Reservoir Road N.W., Washington, DC 20007, USA
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26
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Xiao HB, Yang ZC, Jia SJ, Li NS, Jiang DJ, Zhang XH, Guo R, Zhou Z, Deng HW, Li YJ. Effect of asymmetric dimethylarginine on atherogenesis and erythrocyte deformability in apolipoprotein E deficient mice. Life Sci 2007; 81:1-7. [PMID: 17532008 DOI: 10.1016/j.lfs.2007.04.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2006] [Revised: 03/29/2007] [Accepted: 04/09/2007] [Indexed: 10/23/2022]
Abstract
Previous investigations have shown that the level of asymmetric dimethylarginine (ADMA) was increased in hypercholesterolemic animal and humans, and the decreased erythrocyte deformability has been suggested to be a factor contributing to atherogenesis. In the present study, we investigated the effect of ADMA, endogenous or exogenous, on atherogenesis and erythrocyte deformability in apolipoprotein E deficient (ApoE-/-) mice. On a regular chow diet, ApoE-/- mice or C57BL/6 J mice at 12 weeks of age were treated with ADMA (5 mg/kg/day) for 4 weeks. Atherosclerotic lesion area, erythrocyte deformability, plasma lipids and asymmetric dimethylarginine (ADMA) level were determined. Plasma concentrations of triglyceride (TG), low-density lipoprotein-cholesterol (LDL-C), total cholesterol (TC), ADMA, and atherosclerotic lesion area were significantly increased, and the level of plasma high-density lipoprotein-cholesterol (HDL-C), erythrocyte deformability in ApoE-/- mice were markedly decreased compared with that of C57BL/6J mice (P<0.05 or P<0.01). Exogenous ADMA treatment increased the plasma TG level, produced atherosclerotic lesions, and decreased erythrocyte deformability in C57BL/6J mice (P<0.05 or P<0.01). Treatment with exogenous ADMA further increased the plasma TG level and lesion areas, and decreased erythrocyte deformability in ApoE-/- mice. In vitro, exogenous ADMA caused a decrease of erythrocyte deformability in a concentration-dependent manner, and the effect of ADMA was reversed by L-arginine. The present results suggest that endogenous ADMA is an important contributor to the development of atherosclerosis and that reduction of erythrocyte deformability and impaired endothelial function induced by ADMA may be an important factor facilitating atherosclerotic lesions.
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Affiliation(s)
- Hong-Bo Xiao
- Department of Pharmacology, School of Pharmaceutical Sciences, Central South, University, Changsha, Hunan 410078, China
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