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Dmitry V Burdin, Alexey A Kolobov, Chad Brocker, Alexey A Soshnev, Nikolay Samusik, Anton V Demyanov, Silke Brilloff, Natalia Jarzebska, Jens Martens-Lobenhoffer, Maren Mieth, Renke Maas, Stefan R Bornstein, Stefanie M Bode-Böger, Frank Gonzalez, Norbert Weiss, Roman N Rodionov
Elevated levels of circulating asymmetric and symmetric dimethylarginines (ADMA and SDMA) predict and potentially contribute to end organ damage in cardiovascular diseases. Alanine-glyoxylate aminotransferase 2 (AGXT2) regulates systemic levels of ADMA and SDMA, and also of beta-aminoisobutyric acid (BAIB)-a modulator of lipid metabolism. We identified a putative binding site for hepatic nuclear factor 4 α (HNF4α) in AGXT2 promoter sequence. In a luciferase reporter assay we found a 75% decrease in activity of Agxt2 core promoter after disruption of the HNF4α binding site...
October 18, 2016: Scientific Reports
Tse-Min Lu, Chiao-Po Hsu, Chao-Fu Chang, Chih-Ching Lin, Tzong-Shyuan Lee, Shing-Jong Lin, Wan-Leong Chan
BACKGROUND AND AIMS: Decreased nitric oxide (NO) bioavailability and increased oxidative stress may be involved in the pathogenesis of contrast-induced acute kidney injury (CI-AKI). The relationship between asymmetric dimethylarginine (ADMA), an endogenous NO synthase inhibitor, and CI-AKI is unknown. METHODS: We measured plasma ADMA levels in 664 consecutive subjects undergoing cardiac catheterization. Mehran score for predicting the risk of CI-AKI was calculated...
October 6, 2016: Atherosclerosis
Taşkın Şentürk, Nergiz Yılmaz, Gökhan Sargın, Kutsi Köseoğlu, Çiğdem Yenisey
OBJECTIVE: In rheumatoid arthritis (RA), endothelial dysfunction caused by the inflammatory process increases the risk of cardiovascular disease. Asymmetric Dimethylarginine (ADMA) leads to vascular dysfunction, whereas atherosclerosis and increased ADMA is associated with cardiovascular disease risk factors. Flow-mediated Dilation (FMD) is a radiological method to demonstrate endothelial dysfunction. In the present study, we assessed the availability of ADMA as a marker for endothelial dysfunction in RA patients...
September 2016: Eur J Rheumatol
You-Lin Tain, Wei-Chia Lee, Kay L H Wu, Steve Leu, Julie Y H Chan
Hypertension can be programmed in response to nutritional insults in early life. Maternal high-fructose (HF) intake induced programmed hypertension in adult male offspring, which is associated with renal programming and arachidonic acid metabolism pathway. We examined whether early treatment with a soluble epoxide hydrolase (SEH) inhibitor, 12-(3-adamantan-1-yl-ureido)-dodecanoic acid (AUDA) or 15-Deoxy-Δ(12,14)-prostagandin J2 (15dPGJ2) can prevent HF-induced programmed hypertension. Pregnant Sprague Dawley rats received regular chow or chow supplemented with fructose (60% diet by weight) during the whole period of pregnancy and lactation...
September 7, 2016: Journal of Nutritional Biochemistry
Francesca Santilli, Rossella Liani, Patrizia Di Fulvio, Gloria Formoso, Paola Simeone, Romina Tripaldi, Thor Ueland, Pål Aukrust, Giovanni Davì
Resistin is an adipokine that promotes inflammation and insulin resistance by targeting several cells including platelets. We hypothesised that in type 2 diabetes (T2DM), resistin may foster in vivo oxidative stress, thromboxane-dependent platelet activation and platelet-derived inflammatory proteins release, key determinants of atherothrombosis. A cross-sectional comparison of circulating resistin, sCD40L, as a marker of platelet-mediated inflammation, asymmetric dimethylarginine (ADMA), endothelial dysfunction marker, Dickkopf (DKK)-1, reflecting the inflammatory interaction between platelets and endothelial cells, and urinary 8-iso-PGF2α and 11-dehydro-TxB2, reflecting in vivo lipid peroxidation and platelet activation, respectively, was performed between 79 T2DM patients and 30 healthy subjects...
October 6, 2016: Thrombosis and Haemostasis
Wafaa A Hewedy, Dalia K Mostafa
BACKGROUND: Cyclosporine A (CsA)-induced nephrotoxicity is a challenging problem complicating its chronic use in a large array of autoimmune diseases, as well as in organ transplantation. A considerable body of evidence points to the involvement of nitric oxide (NO) and its endogenous synthesis inhibitor, asymmetric dimethylarginine (ADMA), in CsA-induced renal and cardiovascular adverse effects. In this study, the potential of the third generation β-blocker, nebivolol, to modify the NO/ADMA system is hypothesized to play a role in protection against CsA-induced renal injury and endothelial dysfunction...
August 31, 2016: Pharmacological Reports: PR
Gian Luca Erre, Alessandra Piras, Silvia Mura, Nicola Mundula, Marco Piras, Loredana Taras, Maria Giovanna Longu, Pier Sergio Saba, Antonello Ganau, Ciriaco Carru, Giuseppe Passiu
OBJECTIVE: To investigate whether levels of asymmetric dimethylarginine (ADMA), as a measure of endothelial dysfunction, are higher in patients with rheumatoid arthritis compared with healthy control subjects. The relationships between ADMA and surrogate measures of arterial stiffness were evaluated. METHODS: Patients with rheumatoid arthritis and healthy control subjects were recruited. ADMA was quantified via enzyme-linked immunosorbent assay. Arterial stiffness was evaluated using pulse wave analysis...
September 2016: Journal of International Medical Research
Chao Xuan, Long-Qiang Xu, Qing-Wu Tian, Hui Li, Qing Wang, Guo-Wei He, Li-Min Lun
Asymmetric dimethylarginine (ADMA) has been shown to be an independent predictor of cardiovascular diseases. Dimethylarginine dimethylaminohydrolase 2 (DDAH 2) promotes the metabolism of ADMA and plays a key role in the regulation of acute inflammatory response. With the present study, we investigated the relationship between DDAH 2 polymorphisms and risk of coronary artery disease (CAD) and its association to plasma ADMA concentrations. We used the haplotype-tagging SNP approach to identify tag SNPs in DDAH 2...
September 28, 2016: Scientific Reports
Liming Peng, Ke Xia, Zhenyu Zhao, Dai Li, Zhichun Yang, Tianlun Yang
OBJECTIVE: Previous studies show that platelet aggregation and asymmetric dimethyl arginine (ADMA) are increased in hypertensive patients and animals. However, the relationship between endogenous ADMA and platelet aggregation in spontaneous hypertensive rats (SHR) remains unclear. Since Losartan can increase the nitric oxide (NO) release and ameliorate the state of thrombosis, we aimed to test whether the beneficial effect of losartan on platelet aggregation results from the reduction of ADMA generation...
September 2016: Journal of Hypertension
Shan Huang, Dajin Zou, Wenfang Peng, Xiaohong Jiang, Kan Shao, Lili Xia, Yubin Tang
PURPOSE: To investigate the effects of asymmetric dimethyl-arginine (ADMA), adiponectin (APN) and apelin in predicting macroangiopathy in impaired glucose regulation (IGR) patients. METHODS: A total of 210 patients undergoing oral glucose tolerance test were included in this study. They were classified to normal glucose tolerance (NGT, n=42), impaired fasting glucose (IFG, n=36), impaired glucose tolerance (IGT, n=92, including 44 IGT1 and 48 IGT2 patients) and IFG+IGT (n=40) groups...
September 15, 2016: Annales D'endocrinologie
Begoña Quintana-Villamandos, María Carmen González, María Jesús Delgado-Martos, Luis Condezo-Hoyos, Rainer H Böger, Nicole Lüneburg, Laia Pazó-Sayós, Perla Yareli Gutiérrez-Arzapalo, Emilio Delgado-Baeza
Esmolol produces early regression of left ventricular hypertrophy and improves coronary artery remodeling, although the impact of short-term treatment with this beta-blocker on remodeling in large arteries has not yet been studied. We hypothesized that even a short (48h) course of esmolol might alter remodeling of the aorta in the spontaneously hypertensive rat (SHR). Fourteen-month-old male SHRs were treated intravenously with vehicle (SHR, n=8) or esmolol (SHR-E, n=8) (300μg/kg/min). Age-matched, vehicle-treated male Wistar-Kyoto rats (WKY, n=8) served as controls...
September 14, 2016: European Journal of Pharmacology
Bridget E Barber, Timothy William, Matthew J Grigg, Kim A Piera, Youwei Chen, Hao Wang, J Brice Weinberg, Tsin W Yeo, Nicholas M Anstey
BACKGROUND:  Pathogenesis of severe Plasmodium vivax malaria is poorly understood. Endothelial dysfunction and reduced nitric-oxide (NO) bioavailability characterise severe falciparum malaria, but have not been assessed in severe vivax malaria. METHODS:  In patients with severe (n=9) and non-severe (n=58) vivax malaria, and in healthy controls (HCs, N=79) we measured NO-dependent endothelial function using reactive hyperemia-peripheral arterial tonometry (RH-PAT), and assessed associations with arginine, asymmetric dimethylarginine (ADMA) and haemolysis...
September 13, 2016: Journal of Infectious Diseases
G Taçoy, H D Başer, A Çengel, K Başer, Ö Kuş, A F Tuncel, A Bolayır, H Paşaoğlu, B Boyaci, R Yalçın
Objective: Right heart function is a major determinant of clinical outcome in patients with elevated pulmonary artery pressure due to pulmonary venous hypertension (PVH) and pulmonary arterial hypertension (PAH). Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthase. In our study, we aimed to evaluate if different type of pulmonary hypertension (PH) cause the same effect on right heart functions and serum asymmetric dimethylarginine (ADMA) levels in female patients...
March 14, 2016: West Indian Medical Journal
Anna Czarnecka, Krzysztof Milewski, Radosław Jaźwiec, Magdalena Zielińska
Alterations in brain nitric oxide (NO)/cGMP synthesis contribute to the pathogenesis of hepatic encephalopathy (HE). An increased asymmetrically dimethylated derivative of L-arginine (ADMA), an endogenous inhibitor of NO synthases, was observed in plasma of HE patients and animal models. It is not clear whether changes in brain ADMA reflect its increased local synthesis therefore affecting NO/cGMP pathway, or are a consequence of its increased peripheral blood content. We measured extracellular concentration of ADMA and symmetrically dimethylated isoform (SDMA) in the prefrontal cortex of control and thioacetamide (TAA)-induced HE rats...
September 8, 2016: Neurotoxicity Research
Nicholas S Kirkby, Abel Tesfai, Blerina Ahmetaj-Shala, Hime H Gashaw, Walkyria Sampaio, Gisele Etelvino, Nádia Miricéia Leão, Robson A Santos, Jane A Mitchell
Nonsteroidal antiinflammatory drugs, including ibuprofen, are among the most commonly used medications and produce their antiinflammatory effects by blocking cyclooxygenase (COX)-2. Their use is associated with increased risk of heart attacks caused by blocking COX-2 in the vasculature and/or kidney, with our recent work implicating the endogenous NOS inhibitor asymmetric dimethylarginine (ADMA), a cardiotoxic hormone whose effects can be prevented by l-arginine. The ibuprofen salt ibuprofen arginate (Spididol) was created to increase solubility but we suggest that it could also augment the NO pathway through codelivery of arginine...
September 6, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
Grigorios A Karampas, Makarios I Eleftheriades, Konstantinos C Panoulis, Myrto D Rizou, Alexander D Haliassos, Dimitra K Metallinou, George P Mastorakos, Demetrios A Rizos
OBJECTIVE: To determine the performance of maternal characteristics, Doppler and a set of biochemical markers for pre-eclampsia (PE) screening at 11+0 to 13+6 and 20+1 to 25+6 weeks' gestation. STUDY DESIGN: Prospectively enrolled women at 11+0 to 13+6 and 20+1 to 25+6 weeks. Maternal characteristics, uterine artery pulsatility index (UtA-PI), ductus venosus pulsatility index (DV-PI) and serum biomarkers including pregnancy associated plasma protein - A (PAPP-A), placental growth factor (PlGF), soluble fms-like tyrosine kinase 1 (sFlt-1), s-Flt-1/PLGF ratio, asymmetric dimethylarginine (ADMA), matrix metalloproteinase 9 (MMP-9), neutrophil gelatinase-associated lipocalin (NGAL) and MMP-9/NGAL complex were recorded...
October 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Fumihiro Ishikawa, Hiroyasu Sugimoto, Hideaki Kakeya
Andrimid (Adm) synthase, which belongs to the type II system of enzymes, produces Adm in Pantoea agglomerans. The adm biosynthetic gene cluster lacks canonical acyltransferases (ATs) to load the malonyl group to acyl carrier proteins (ACPs), thus suggesting that a malonyl-CoA ACP transacylase (MCAT) from the fatty acid synthase (FAS) complex provides the essential AT activity in Adm biosynthesis. Here we report that an MCAT is essential for catalysis of the transacylation of malonate from malonyl-CoA to AdmA polyketide synthase (PKS) ACP in vitro...
September 6, 2016: Chembiochem: a European Journal of Chemical Biology
Omid Toupchian, Gity Sotoudeh, Anahita Mansoori, Ensieh Nasli-Esfahani, Mahmoud Djalali, Seyyed Ali Keshavarz, Fariba Koohdani
BACKGROUND: The beneficial effects of n-3 polyunsaturated fatty acids on reducing cardiovascular risks are well documented. However, the relative effect on some markers of macrophage activation and vascular function is unclear. OBJECTIVE: The primary objective of this study was to investigate the effects of docosahexaenoic acid (DHA)-enriched fish oil on the marker of monocyte/macrophage activation factor soluble CD163, asymmetric dimethyl arginine (ADMA), and insulin resistance in type 2 diabetic patients...
July 2016: Journal of Clinical Lipidology
Anne-Lise Bjørke-Monsen, Maria Vollsæter, Per M Ueland, Trond Markestad, Knut Øymar, Thomas Halvorsen
RATIONALE: Bronchial hyperresponsiveness (BHR), a feature of asthma, is observed in preterm-born children and has been linked to intrauterine growth restriction. BHR is mediated via airway smooth muscle tone and modulated by the autonomic nervous system, nitric oxide and airway inflammation. Interactions between these factors are insufficiently understood. METHODS: Methacholine induced BHR (Met-BHR), fractional exhaled NO (FeNO), and systemic soluble markers of nitric oxide metabolism and inflammation were determined in a population-based sample of 57 eleven-year-old children born extremely preterm (gestational age (GA) <28 weeks) or with extremely low birth weight (<1000 grams), and a matched normal birthweight term-born control group (n=54)...
August 30, 2016: American Journal of Respiratory Cell and Molecular Biology
Balázs Németh, István Kiss, Iván Péter, Zénó Ajtay, Ádám Németh, László Márk, Attila Csorba, Tamás Kőszegi, Diána Mühl, Péter Kustán
BACKGROUND/AIM: Nitric oxide (NO) pathway plays a major role in the development and advancement of inflammation. We aimed to design a study and investigate its feasibility to show the changes of L-arginine, asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA), which are important regulators of the NO pathway. PATIENTS AND METHODS: Concentrations of L-arginine, ADMA and SDMA were measured by liquid chromatography-tandem mass spectrometry. Seventeen septic survival patients were enrolled and blood samples were obtained on the first, third and fifth day after the diagnosis of sepsis...
September 2016: In Vivo
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