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https://www.readbyqxmd.com/read/29777874/asymmetric-dimethylarginine-contributes-to-retinal-neovascularization-of-diabetic-retinopathy-through-ephrinb2-pathway
#1
Mei-Rong Du, Li Yan, Nian-Sheng Li, Yu-Jie Wang, Ting Zhou, Jun-Lin Jiang
Diabetic retinopathy (DR) is a leading cause of vision loss with retinal neovascularization. This study aims to investigate whether Asymmetric dimethylarginine (ADMA) impacts the pathogenesis of DR via focusing on promoting retinal neovascularization and its underlying molecular mechanisms. Diabetic rats were induced by a single intraperitoneal injection of streptozotocin (STZ) for 20 weeks. ADMA levels in aqueous and the influence of hypoxia on ADMA and angiogenesis in RF/6A cells were examined. The effects and underlying molecular mechanisms of ADMA on neovascularization of RF/6A cells were further evaluated by administration of ADMA, DDAH siRNA or ephrinB2 siRNA...
May 16, 2018: Vascular Pharmacology
https://www.readbyqxmd.com/read/29743087/untargeted-metabolomic-on-urine-samples-after-%C3%AE-lipoic-acid-and-or-eicosapentaenoic-acid-supplementation-in-healthy-overweight-obese-women
#2
Ana Romo-Hualde, Ana E Huerta, Carlos J González-Navarro, Omar Ramos-López, María J Moreno-Aliaga, J Alfredo Martínez
BACKGROUND: Eicosapentaenoic acid (EPA) and α-lipoic acid (α-LA) have been investigated for their beneficial effects on obesity and cardiovascular risk factors. In the current research, the goal was to evaluate metabolomic changes following the dietary supplementation of these two lipids, alone or combined in healthy overweight/obese sedentary women following an energy-restricted diet. For this purpose, an untargeted metabolomics approach was conducted on urine samples using liquid chromatography coupled with time of flight mass spectrometry (HPLC-TOF-MS)...
May 9, 2018: Lipids in Health and Disease
https://www.readbyqxmd.com/read/29729549/targeting-arginase-and-nitric-oxide-metabolism-in-chronic-airway-diseases-and-their-co-morbidities
#3
REVIEW
Mariska Pm van den Berg, Herman Meurs, Reinoud Gosens
In the airways, arginase and NOS compete for the common substrate l-arginine. In chronic airway diseases, such as asthma and COPD, elevated arginase expression contributes to airway contractility, hyperresponsiveness, inflammation and remodeling. The disrupted l-arginine homeostasis, through changes in arginase and NOS expression and activity, does not only play a central role in the development of various airways diseases such as asthma or COPD. It possibly also affects l-arginine homeostasis throughout the body contributing to the emergence of co-morbidities...
May 2, 2018: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29721731/assessment-of-the-direct-effects-of-ddah-i-on-tumour-angiogenesis-in-vivo
#4
Efthymia Papaevangelou, Jessica K R Boult, Guy S Whitley, Simon P Robinson, Franklyn A Howe
Nitric oxide (NO) has been strongly implicated in glioma progression and angiogenesis. The endogenous inhibitors of NO synthesis, asymmetric dimethylarginine (ADMA) and N-monomethyl-L-arginine (L-NMMA), are metabolized by dimethylarginine dimethylaminohydrolase (DDAH), and hence, DDAH is an intracellular factor that regulates NO. However, DDAH may also have an NO-independent action. We aimed to investigate whether DDAH I has any direct role in tumour vascular development and growth independent of its NO-mediated effects, in order to establish the future potential of DDAH inhibition as an anti-angiogenic treatment strategy...
May 2, 2018: Angiogenesis
https://www.readbyqxmd.com/read/29713239/oxysterols-increase-inflammation-lipid-marker-levels-and-reflect-accelerated-endothelial-dysfunction-in-experimental-animals
#5
Tomasz Wielkoszyński, Jolanta Zalejska-Fiolka, Joanna K Strzelczyk, Aleksander J Owczarek, Armand Cholewka, Marcin Furmański, Agata Stanek
Objective: Oxidized cholesterol derivatives are thought to exert atherogenic effect thus adversely affecting vascular endothelium. The aim of the study was to assess the effect of 5 α ,6 α -epoxycholesterol on experimentally induced hypercholesterolemia in rabbits, and the levels of homocysteine (HCY), asymmetric dimethylarginine (ADMA), paraoxonase-1 (PON-1), and inflammatory parameters (IL-6, TNF- α , CRP). Material and methods: The rabbits were divided into 3 groups, 8 animals each, and fed with basic fodder (C), basic fodder plus cholesterol (Ch) or basic fodder plus 5 α ,6 α -epoxycholesterol, and unoxidized cholesterol (ECh)...
2018: Mediators of Inflammation
https://www.readbyqxmd.com/read/29712976/impact-of-hiv-and-type-2-diabetes-on-gut-microbiota-diversity-tryptophan-catabolism-and-endothelial-dysfunction
#6
Hedda Hoel, Malene Hove-Skovsgaard, Johannes R Hov, Julie Christine Gaardbo, Kristian Holm, Martin Kummen, Knut Rudi, Felix Nwosu, Jørgen Valeur, Marco Gelpi, Ingebjørg Seljeflot, Per Magne Ueland, Jan Gerstoft, Henrik Ullum, Pål Aukrust, Susanne Dam Nielsen, Marius Trøseid
HIV infection and type 2 diabetes are associated with altered gut microbiota, chronic inflammation, and increased cardiovascular risk. We aimed to investigate the combined effect of these diseases on gut microbiota composition and related metabolites, and a potential relation to endothelial dysfunction in individuals with HIV-infection only (n = 23), diabetes only (n = 16) or both conditions (n = 21), as well as controls (n = 24). Fecal microbiota was analyzed by Illumina sequencing of the 16 S rRNA gene...
April 30, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29697075/relationship-of-asymmetric-dimethylarginine-levels-with-disease-severity-and-pulmonary-hypertension-in-chronic-obstructive-pulmonary-disease
#7
Elif Torun Parmaksız, Ali Inal, Banu Salepci, Sevda Comert, Ali Fidan, Nesrin Kiral, Coşkun Doǧan, Benan Caglayan
Background: Asymmetric dimethylarginine (ADMA) has emerged as a risk marker for many conditions related to pulmonary hypertension (PH); however, little is known about ADMA and symmetric dimethylarginine (SDMA) plasma concentrations in chronic obstructive pulmonary disease (COPD). Our interest centers on the role of ADMA in regulation of endothelial function in COPD and secondary PH. The aim of the present study was to evaluate the serum ADMA, SDMA, and L-arginine concentrations in COPD and its association with PH...
May 2018: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/29682517/dihydromyricetin-attenuates-tnf-%C3%AE-induced-endothelial-dysfunction-through-mir-21-mediated-ddah1-adma-no-signal-pathway
#8
Dafeng Yang, Shenglan Tan, Zhousheng Yang, Pei Jiang, Caie Qin, Qiong Yuan, Ruili Dang, Xiaoxia Yao, Jian Qu, Qiong Lu, Ping Xu, Bikui Zhang, Daxiong Xiang, Lei Chen
Accumulating studies demonstrate that dihydromyricetin (DMY), a compound extracted from Chinese traditional herb, Ampelopsis grossedentata , attenuates atherosclerotic process by improvement of endothelial dysfunction. However, the underlying mechanism remains poorly understood. Thus, the aim of this study is to investigate the potential mechanism behind the attenuating effects of DMY on tumor necrosis factor alpha- (TNF- α -) induced endothelial dysfunction. In response to TNF- α , microRNA-21 (miR-21) expression was significantly increased in human umbilical vein endothelial cells (HUVECs), in line with impaired endothelial dysfunction as evidenced by decreased tube formation and migration, endothelial nitric oxide synthase (eNOS) (ser1177) phosphorylation, dimethylarginine dimethylaminohydrolases 1 (DDAH1) expression and metabolic activity, and nitric oxide (NO) concentration as well as increased asymmetric dimethylarginine (ADMA) levels...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29682152/thrombomodulin-as-a-new-marker-of-endothelial-dysfunction-in-chronic-kidney-disease-in-children
#9
Dorota Drożdż, Monika Łątka, Tomasz Drożdż, Krystyna Sztefko, Przemko Kwinta
Endothelial dysfunction (ED) and oxidative stress are potential new pathomechanisms of cardiovascular diseases in patients with chronic kidney disease (CKD). The aim of the study was to assess the association between endothelial dysfunction, oxidative stress biomarkers, and cardiovascular risk factors in children with CKD. Serum oxidized LDL (oxLDL), protein carbonyl group, urea, creatinine, cystatin C, thrombomodulin, asymmetric dimethylarginine (ADMA), von Willebrand factor, brain natriuretic peptide (BNP), lipids, high sensitivity C-reactive protein, intercellular adhesion molecule-1 levels, and albuminuria were measured...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29660911/the-effects-of-different-remote-ischemic-conditioning-on-ischemia-induced-failure-of-microvascular-circulation-in-humans
#10
Muzaffer Akkoca, Suzan Emel Usanmaz, Serhat Tokgöz, Cüneyt Köksoy, Emine Demirel-Yilmaz
BACKGROUND: Intermittent ischemia in remote tissues can be applied before ischemic injury, during ischemic injury or at the beginning of reperfusion of an index organ ischemia. The aim of this study was to investigate the effect of Remote Ischemic Conditioning (RIC) of the leg on changes in ischemia-induced the microvascular functions of the arm. MATERIAL AND METHODS: Ischemic microvascular injury was induced by arm ischemia (20 min) and reperfusion in healthy, nonsmoker, male volunteers (ischemia group-ISC, n: 9)...
April 13, 2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29648475/alterations-in-plasma-l-arginine-and-methylarginines-in-heart-failure-and-after-heart-transplantation
#11
Jakob Lundgren, Anna Sandqvist, Mikael Hedeland, Ulf Bondesson, Gerhard Wikström, Göran Rådegran
OBJECTIVE: Endothelial function, including the nitric oxide (NO)-pathway, has previously been extensively investigated in heart failure (HF). In contrast, studies are lacking on the NO pathway after heart transplantation (HT). We therefore investigated substances in the NO pathway prior to and after HT in relation to hemodynamic parameters. DESIGN: 12 patients (median age 50.0 yrs, 2 females), heart transplanted between June 2012 and February 2014, evaluated at our hemodynamic lab, at rest, prior to HT, as well as four weeks and six months after HT were included...
April 12, 2018: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/29623044/long-term-intermittent-work-at-high-altitude-right-heart-functional-and-morphological-status-and-associated-cardiometabolic-factors
#12
Julio Brito, Patricia Siques, Rosario López, Raul Romero, Fabiola León-Velarde, Karen Flores, Nicole Lüneburg, Juliane Hannemann, Rainer H Böger
Background: Living at high altitude or with chronic hypoxia implies functional and morphological changes in the right ventricle and pulmonary vasculature with a 10% prevalence of high-altitude pulmonary hypertension (HAPH). The implications of working intermittently (day shifts) at high altitude (hypobaric hypoxia) over the long term are still not well-defined. The aim of this study was to evaluate the right cardiac circuit status along with potentially contributory metabolic variables and distinctive responses after long exposure to the latter condition...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29619838/relationship-between-exercise-intervention-and-no-pathway-in-patients-with-heart-failure-with-preserved-ejection-fraction
#13
Flavia Baldassarri, Edzard Schwedhelm, Dorothee Atzler, Rainer H Böger, Kathrin Cordts, Bernhard Haller, Axel Pressler, Stephan Müller, Christiane Suchy, Rolf Wachter, Hans-Dirk Düngen, Gerd Hasenfuss, Burkert Pieske, Martin Halle, Frank Edelmann, André Duvinage
OBJECTIVE: Elevated levels of arginine derivatives in the NO pathway, such as asymmetric dimethylarginine (ADMA), are related to disease severity and reduced exercise capacity in heart failure. We investigated the influence of exercise intervention on these parameters and on L-arginine (L-Arg) and L-homoarginine (L-hArg) in heart failure with preserved ejection fraction (HFpEF) patients. MATERIAL AND METHODS: Sixty-two patients (65 ± 6 years) were included in this analysis and randomised to supervised endurance/resistance training (ET) or to usual care (UC)...
April 5, 2018: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/29618156/adamts-13-activity-predicts-outcome-in-acute-ischaemic-stroke-patients-undergoing-endovascular-treatment
#14
Ramona Schuppner, Meike Dirks, Gerrit M Grosse, Matthias Böckmann, Friedrich Goetz, Thomas Pasedag, Stefanie M Bode-Böger, Jens Martens-Lobenhoffer, Ulrich Budde, Heinrich Lanfermann, Ralf Lichtinghagen, Karin Weissenborn, Hans Worthmann
BACKGROUND:  Endovascular treatment improves outcome in patients with acute ischaemic stroke due to large vessel occlusion in general. But outcome in some of these patients is jeopardized by recanalization failure or bleeding. OBJECTIVES:  This study aimed to determine a possible association of mediators of inflammation and haemostasis (C-reactive protein, interleukin-6, matrix metalloproteinase-9, monocyte chemoattractant protein-1, asymmetric dimethylarginine [ADMA], symmetric dimethylarginine, von Willebrand factor and a disintegrin and metalloproteinase with a thrombospondin type 1 motif 13 [ADAMTS-13]) with the post-intervention grade of reperfusion, complications and clinical outcome in patients who underwent endovascular treatment of ischaemic stroke...
April 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29614743/protective-effect-of-polyphenol-rich-extract-from-bee-pollen-in-a-high-fat-diet
#15
Anna Rzepecka-Stojko, Agata Kabała-Dzik, Robert Kubina, Krzysztof Jasik, Maciej Kajor, Dorota Wrześniok, Jerzy Stojko
We have studied a preventive effect of polyphenol-rich bee pollen ethanol extract (EEP) against histological changes in the liver and cardiac blood vessels, abnormalities of lipid profile, and the levels of oxidized low density lipoproteins (ox-LDL), asymmetric dimethylarginine (ADMA), angiotensin-converting enzyme (ACE), and angiotensin II (ANG II) caused by a high-fat diet in C57 BL₆ mice. Supplementing the diet with EEP in the doses of 0.1 g/kg body mass (BM) and 1 g/kg BM resulted in a decrease of total cholesterol by 31% and 35%, respectively...
March 31, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29604155/association-of-endothelial-dysfunction-with-cardiovascular-risk-factors-and-new-onset-diabetes-mellitus-in-patients-with-hypertension
#16
Cristina Bergmann Triches, Saurus Mayer, Beata Marie Redublo Quinto, Marcelo Costa Batista, Maria Teresa Zanella
Asymmetric dimethylarginine (ADMA), which is the main endogenous inhibitor of nitric oxide synthase, plays a critical role in the process of endothelial dysfunction. The authors evaluated the association between high plasma ADMA levels in patients with hypertension and the presence of cardiovascular risk factors and the development of type 2 diabetes mellitus (DM) and cardiovascular outcomes, including death. The authors evaluated 191 patients with hypertension who were stratified into two groups according to the median value of basal ADMA: those with high levels of plasma ADMA (>0...
March 31, 2018: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/29600966/asymmetric-dimethylarginine-as-a-useful-risk-marker-of-radial-artery-calcification-in-patients-with-advanced-kidney-disease
#17
Marcin Krzanowski, Katarzyna Krzanowska, Mariusz Gajda, Paulina Dumnicka, Grzegorz Kopeć, Bartłomiej Guzik, Karolina Woziwodzka, Artur Dziewierz, Jan A Litwin, Władysław Sułowicz
INTRODUCTION    Medial arterial calcification is common in patients with chronic kidney disease (CKD) and is considered a risk factor for morbidity and mortality. OBJECTIVES    We aimed to evaluate the correlation between asymmetric dimethylarginine (ADMA) levels, radial artery calcification, and common carotid artery intima-media thickness (CCA‑IMT). PATIENTS AND METHODS    The study included 51 patients with CKD, in whom an arteriovenous fistula for hemodialysis access was created to collect radial artery samples for a histological examination, and 33 healthy volunteers, in whom the reference concentrations of ADMA were assessed...
March 29, 2018: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/29597186/levels-of-endocan-angiopoietin-2-and-hypoxia-inducible-factor-1a-in-patients-with-autosomal-dominant-polycystic-kidney-disease-and-different-levels-of-renal-function
#18
Vassilios Raptis, Constantinos Bakogiannis, Charalampos Loutradis, Afroditi K Boutou, Ioanna Lampropoulou, Elena Intzevidou, Athanasios Sioulis, Elias Balaskas, Pantelis A Sarafidis
BACKGROUND: Endothelial dysfunction leading to unbalanced vasoconstriction and ischemia of renal parenchyma is increasingly proposed as an alternative pathway of renal damage in autosomal dominant polycystic kidney disease (ADPKD). However, human studies investigating the evolution of such phenomena are limited. This study investigated the levels of emerging biomarkers of endothelial function, angiogenesis and hypoxia, in ADPKD patients with different renal function. METHODS: The study population consisted of three groups: 26 ADPKD patients with impaired renal function (Group A; estimated glomerular filtration rate [eGFR] 45-70 mL/min/1...
March 29, 2018: American Journal of Nephrology
https://www.readbyqxmd.com/read/29582894/sex-differences-in-the-associations-between-l-arginine-pathway-metabolites-skeletal-muscle-mass-and-function-and-their-responses-to-resistance-exercise-in-old-age
#19
M Da Boit, S Tommasi, D Elliot, A Zinellu, S Sotgia, R Sibson, J R Meakin, R M Aspden, C Carru, A A Mangoni, S R Gray
OBJECTIVES: The current study was designed to explore the associations between L-arginine metabolites and muscle mass and function in old age, which are largely unknown. DESIGN: The study used a randomised, double-blind, placebo-controlled design. SETTING: The study was carried out in a laboratory setting. PARTICIPANTS: 50 healthy older adults [median age 70 years (IQR 67-73); 27 males]. INTERVENTION: Participants undertook an 18-week resistance exercise program, and a nutritional intervention (fish oil vs...
2018: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/29565307/temperature-and-recognition-dual-responsive-poly-n-isopropylacrylamide-and-poly-n-n-dimethylacrylamide-with-adamantyl-side-group
#20
Qiujing Dong, Chunhua Luo, Na Li, Jiaxiang Chi, Qingqing Zhang
A series of copolymers with an adamantyl side group (poly(NIPAM-co-AdMA) and poly(DMAM-co-AdMA)) were prepared by radical copolymerization of N -isopropylacrylamide (NIPAM) and N , N -dimethylacrylamide (DMAM) with a 2-methyl-2-adamantylmethacrylate (AdMA) monomer. The structure and composition of the as-synthesized copolymers were characterized by Fourier transform infrared (FT-IR) spectroscopy, proton nuclear magnetic resonance (¹H NMR) spectroscopy, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), and elemental analysis...
March 22, 2018: Materials
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