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https://www.readbyqxmd.com/read/28527056/pathogenesis-of-chronic-cluster-headache-and-bouts-role-of-tryptamine-arginine-metabolism-and-%C3%AE-1-agonists
#1
G D'Andrea, G Bussone, P Di Fiore, F Perini, A Gucciardi, A Bolner, M Aguggia, G Saracco, E Galloni, G Giordano, A Leon
The aim of this study was to explore the possible role of tryptamine in the pathogenesis of chronic cluster headache along with that of adrenaline and noradrenaline (α-agonists) together with arginine metabolism in the origin of cluster bouts. Plasma levels of tyramine, tryptamine, serotonin, 5-hydroxyindolacetic acid, noradrenalin, adrenalin and the markers of arginine metabolism such as arginine, homoarginine, citrulline, ADMA and NMMA, were measured in 23 chronic cluster headache patients (10 chronic cluster ab initio and 13 transformed from episodic cluster) and 28 control subjects...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28516097/asymmetric-dimethylarginine-in-patients-with-ascending-aortic-aneurysms
#2
Natalia D Gavriliuk, Tatiana A Druzhkova, Olga B Irtyuga, Alexandr A Zhloba, Tatiana F Subbotina, Vladimir E Uspenskiy, Nina P Alexeyeva, Olga M Moiseeva
BACKGROUND: Ascending thoracic aortic aneurysm (aTAA) is a heterogeneous group of disorders that involve impaired endothelial function. The nitric oxide (NO) synthase inhibitor asymmetric dimethylarginine (ADMA) serves as an endothelial dysfunction marker. Thus, we investigated ADMA levels in patients with aTAA. METHODS: Eighty-six patients with aTAA and 18 healthy individuals were enrolled. All patients underwent echocardiography. Plasma ADMA levels were measured using high-performance liquid chromatography...
December 2016: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/28502835/the-adma-ddah-no-pathway-in-human-vein-endothelial-cells-exposed-to-arsenite
#3
Citlalli Osorio-Yáñez, Miguel Chin-Chan, Luz C Sánchez-Peña, Octavio G Atzatzi-Aguilar, Jesus A Olivares-Reyes, José Segovia, Luz M Del Razo
Inorganic arsenic (iAs) exposure is related to cardiovascular disease, which is characterized by endothelial dysfunction and nitric oxide (NO) depletion. The mechanisms underlying NO depletion as related to iAs exposure are not fully understood. The endogenous inhibitor of nitric oxide synthase, asymmetric dimethylarginine (ADMA), might be a molecular target of iAs. ADMA concentrations are regulated by proteins involved in its synthesis (arginine methyl transferase 1 [PRMT-1]) and degradation (dimethylarginine dimethylaminohydrolase [DDAH])...
May 11, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28495185/association-of-circulatory-asymmetric-dimethylarginine-adma-with-diabetic-nephropathy-in-asian-indians-and-its-causative-role-in-renal-cell-injury
#4
Isaivani Jayachandran, Saravanakumar Sundararajan, Prabu Paramasivam, Balachandar Venkatesan, Shanthirani C Subramanian, Muthuswamy Balasubramanyam, Viswanathan Mohan, Nagaraj Manickam
AIM: Asymmetric dimethylarginine (ADMA) is involved in the regulation of nitric oxide synthesis and in the maintenance of vascular tone and structure. But the role and status of ADMA in diabetes induced kidney injury is not clear. Hence this study is investigating the role of ADMA in the progression of kidney injury and its circulatory status in Asian Indians with and without diabetic nephropathy. METHODS: Recruited study subjects were divided into normal glucose tolerance (NGT), type 2 diabetes mellitus (T2DM) and T2DM with micro or macroalbuminuria...
May 8, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28494019/the-issue-of-plasma-asymmetric-dimethylarginine-reference-range-a-systematic-review-and-meta-analysis
#5
Balázs Németh, Zénó Ajtay, László Hejjel, Tamás Ferenci, Zoltán Ábrám, Edit Murányi, István Kiss
BACKGROUND: Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthase, marker and mediator of endothelial dysfunction. Several studies have demonstrated its value in cardiovascular risk stratification and all-cause mortality prediction. The aim was to determine the reference range of plasma ADMA in healthy adults. METHODS AND RESULTS: Taking into account the most widely used ADMA measurement methods, only studies using either high performance liquid chromatography (HPLC) -with fluorescence or mass spectrometric detection-, or enzyme-linked immunosorbent assay (ELISA) to quantify plasma ADMA concentrations were enrolled...
2017: PloS One
https://www.readbyqxmd.com/read/28489953/vascular-function-and-arginine-and-dimethylarginines-in-gentamicin-induced-renal-failure-a-possible-effect-of-heme-oxygenase-1-inducer-hemin
#6
Esra Aycan Ustyol, Merve Kabasakal, Seldag Bekpinar, Ilkay Alp Yıldırım, Ozge Tepe, Murat Giris, Yasemin Ozluk, Yesim Unlucerci, B Sonmez Uydes Dogan, Mujdat Uysal
Increased oxidative stress and disturbance in nitric oxide bioavailability lead to endothelial dysfunction and cardiovascular complication in renal disease. Gentamicin (GM), a commonly used antibiotic exhibits a toxic effect on renal proximal tubules. Prevention of its nephrotoxicity is important. Therefore, we investigated whether heme oxygenase (HO)-1 induction influenced kidney and vascular function in GM-administered rats. GM (100 mg/kg/day; ip) was given to rats alone or together with hemin (20 mg/kg/alternate days; ip...
May 10, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28489857/vitamin-d-supplementation-lowers-thrombospondin-1-levels-and-blood-pressure-in-healthy-adults
#7
Anjalee T Amarasekera, Bahador Assadi-Khansari, Saifei Liu, Marilyn Black, Greer Dymmott, Natasha M Rogers, Aaron L Sverdlov, John D Horowitz, Doan T M Ngo
INTRODUCTION: Vitamin D insufficiency, defined as 25-hydroxyvitamin D (25(OH)D) levels < 75nmol/L is associated with cardio-metabolic dysfunction. Vitamin D insufficiency is associated with inflammation and fibrosis, but it remains uncertain whether these anomalies are readily reversible. Therefore, we aimed to determine the effects of vitamin D supplementation on markers of: 1) nitric oxide (NO) signaling, 2) inflammation, and 3) fibrosis, in healthy volunteers with mild hypovitaminosis...
2017: PloS One
https://www.readbyqxmd.com/read/28488288/an-alternative-to-the-star-path-enhancement-of-the-adma-linear-scaling-method-for-protein-modeling
#8
Paul G Mezey, Zoltan Antal
With the aim of improving the performance of macromolecular quantum chemistry conformation analysis and reaction path following methods, the Adjustable Density Matrix Assembler (ADMA) method has already been combined with some faster although less accurate density matrix extrapolation methods, such as the Löwdin-Inverse-Löwdin (LIL) extrapolation along a potential energy surface, and a strategically arranged back-and-forth switching between these methods has been proven to be advantageous. Here, an alternative approach is proposed and investigated, based on several actual test calculations, where the "inexpensive" LIL density matrix extrapolation steps are replaced by only somewhat more expensive, but still ADMA-based calculations, where in the "rough-search stage," only interactions of shorter distances within the macromolecule are considered...
May 10, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28475919/effect-of-arginine-lysine-and-glycine-methionine-intake-ratios-on-dyslipidemia-and-selected-biomarkers-implicated-in-cardiovascular-disease-a-study-with-hypercholesterolemic-rats
#9
Ravula Venkatesh, Krishnapura Srinivasan, Sridevi Annapurna Singh
The effect of intake ratios of arginine (Arg): lysine (Lys) and glycine (Gly): methionine (Met) on lipid profile and selected cardiovascular disease markers, was studied, in rats maintained on a hypercholesterolemic diet. The rise in blood cholesterol was countered by 32%, 24%, and 49%, respectively, through increased oral supplementation of Arg, Gly, and Arg+Gly; a corresponding increase in plasma phospholipids at the end of the 8-week study was observed. The elevated plasma cholesterol to phospholipids ratio was countered by 27, 40, and 57%, respectively, through oral supplementation of Arg, Gly, and Arg+Gly...
May 2, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28463849/effect-of-febuxostat-on-the-endothelial-dysfunction-in-hemodialysis-patients-a-randomized-placebo-controlled-double-blinded-study
#10
Mona Alshahawey, Sara Mahmoud Shahin, Tamer Wahid Elsaid, Nagwa Ali Sabri
BACKGROUND: Endothelial dysfunction is an important risk factor for cardiovascular diseases to occur in end-stage renal disease patients. Febuxostat, being a novel xanthine oxidase inhibitor, is apparently having a beneficial role in improving the endothelial dysfunction; however, data among hemodialysis patients are still limited. METHODS: A prospective, placebo-controlled, block-randomized, double-blinded study was carried out to evaluate the effect of oral febuxostat on the endothelial dysfunction in hemodialysis patients...
2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28455826/subendocardial-viability-ratio-in-patients-with-rheumatoid-arthritis-comparison-with-healthy-controls-and-identification-of-prognostic-factors
#11
Panagiota Anyfanti, Areti Triantafyllou, Eugenia Gkaliagkousi, Georgios Triantafyllou, Nikolaos Koletsos, Sophia Chatzimichailidou, Panagiotis Panagopoulos, Ioannis Botis, Spyros Aslanidis, Stella Douma
Cardiac involvement is common in rheumatoid arthritis. Subendocardial viability ratio (SEVR) is a non-invasive measure of microvascular coronary perfusion, yet it remains unclear whether it is affected in rheumatoid arthritis patients. We additionally sought predictors of SEVR in rheumatoid arthritis among a wide range of disease-related parameters, cardiac and hemodynamic factors, and markers of atherosclerosis, arteriosclerosis, and endothelial dysfunction. SEVR was estimated in rheumatoid arthritis patients and healthy controls by applanation tonometry, which was also used to evaluate arterial stiffness (pulse wave velocity and augmentation index)...
April 28, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28455769/high-asymmetric-dimethylarginine-symmetric-dimethylarginine-and-l-arginine-levels-in-migraine-patients
#12
Aylin Reyhani, Yahya Celik, Hakan Karadag, Ozgur Gunduz, Talip Asil, Necdet Sut
Experimental and clinical data strongly suggests that nitric oxide (NO) plays a pivotal role in migraine. This is also supported by studies of migraine induced by substances that release NO. NO is synthesized from L-arginine by endothelial NO synthase (NOS). Asymmetric dimethylarginine (ADMA) is the major endogenous competitive inhibitor of NOS. Symmetric dimethylarginine (SDMA) is an inactive stereoisomer of ADMA. It may reduce NO production by competing with arginine for cellular uptake. The aim of this study was to measure the levels of ADMA, SDMA and L-arginine in migraine patients during the interictal period...
April 28, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28453332/long-term-intermittent-exposure-to-high-altitude-elevates-asymmetric-dimethylarginine-in-first-exposed-young-adults
#13
Nicole Lüneburg, Patricia Siques, Julio Brito, Juan José De La Cruz, Fabiola León-Velarde, Juliane Hannemann, Cristian Ibanez, Rainer H Böger
Lüneburg, Nicole, Patricia Siques, Julio Brito, Juan José De La Cruz, Fabiola León-Velarde, Juliane Hannemann, Cristian Ibanez, and Rainer Böger. Long-term intermittent exposure to high altitude elevates asymmetric dimethylarginine in first exposed young adults. High Alt Med Biol 00:000-000, 2017.-Hypoxia-induced dysregulation of pulmonary and cerebral circulation may be related to an impaired nitric oxide (NO) pathway. We investigated the effect of chronic intermittent hypobaric hypoxia (CIH) on metabolites of the NO pathway...
April 28, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28450653/prediction-of-wound-healing-in-diabetic-foot-ulcers-an-observational-study-in-tertiary-hospital-in-indonesia
#14
Pradana Soewondo, Slamet Suyono, Mpu Kanoko Sastrosuwignyo, Alida R Harahap, Bambang Sutrisna, Lukman H Makmun
AIM: to evaluate the role of clinical characteristics, functional markers of vasodilation, inflammatory response, and atherosclerosis in predicting wound healing in diabetic foot ulcer. METHODS: a cohort study (February - October 2010) was conducted from 40 subjects with acute diabetic foot ulcer at clinical ward of Dr. Cipto Mangunkusumo National Central General Hospital, Jakarta, Indonesia. Each subject underwent at least two variable measurements, i.e. during inflammatory phase and proliferation phase...
January 2017: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/28443021/functional-and-biochemical-endothelial-profiling-in-vivo-in-a-murine-model-of-endothelial-dysfunction-comparison-of-effects-of-1-methylnicotinamide-and-angiotensin-converting-enzyme-inhibitor
#15
Anna Bar, Mariola Olkowicz, Urszula Tyrankiewicz, Edyta Kus, Krzysztof Jasinski, Ryszard T Smolenski, Tomasz Skorka, Stefan Chlopicki
Although it is known that 1-methylnicotinamide (MNA) displays vasoprotective activity in mice, as yet the effect of MNA on endothelial function has not been demonstrated in vivo. Here, using magnetic resonance imaging (MRI) we profile the effects of MNA on endothelial phenotype in mice with atherosclerosis (ApoE/LDLR(-/-)) in vivo, in comparison to angiotensin (Ang) -converting enzyme (ACE) inhibitor (perindopril), with known vasoprotective activity. On a biochemical level, we analyzed whether MNA- or perindopril-induced improvement in endothelial function results in changes in ACE/Ang II-ACE2/Ang-(1-7) balance, and L-arginine/asymmetric dimethylarginine (ADMA) ratio...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28438873/angiotensin-converting-enzyme-inhibition-improves-the-effectiveness-of-transcutaneous-carbon-dioxide-treatment
#16
Balazs Nemeth, Istvan Kiss, Timea Jencsik, Ivan Peter, Zita Kreska, Tamas Koszegi, Attila Miseta, Peter Kustan, Imre Boncz, Andrea Laczo, Zeno Ajtay
AIM: To study the effect of carbon dioxide (CO2) therapy on the nitric oxide (NO) pathway by monitoring plasma asymmetric dimethylarginine (ADMA) concentrations. PATIENTS AND METHODS: Forty-seven hypertensive patients who underwent transcutaneous CO2 therapy were enrolled. Thirty healthy individuals were recruited for the control group. Blood samples were taken one hour before, as well as one hour, 24 hours and 3 weeks after the first CO2 treatment. Controls did not undergo CO2 treatment...
May 2017: In Vivo
https://www.readbyqxmd.com/read/28436051/a-novel-mass-spectrometry-based-method-for-simultaneous-determination-of-asymmetric-and-symmetric-dimethylarginine-l-arginine-and-l-citrulline-optimized-for-lc-ms-tof-and-lc-ms-ms
#17
Jerzy Wiśniewski, Mariusz G Fleszar, Joanna Piechowicz, Małgorzata Krzystek-Korpacka, Angelika Chachaj, Andrzej Szuba, Katarzyna Lorenc-Kukula, Leszek Masłowski, Wojciech Witkiewicz, Andrzej Gamian
Nitric oxide (NO) is a regulatory molecule involved in many biological processes. NO is produced by nitric oxide synthase by conversion of L-arginine to L-citrulline. L-arginine methylated derivatives, asymmetric and symmetric dimethylarginines (ADMA and SDMA), regulate L-arginine availability and the activity of nitric oxide synthase. As such, they have been frequently investigated as potential biomarkers in pathologies associated with dysfunctions in NO synthesis. Here, we present a new multistep analytical methodology based on liquid chromatography combined with mass spectrometry for the accurate identification of L-arginine, L-citrulline, ADMA, and SDMA...
April 24, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28421995/endothelial-dysfunction-is-independent-of-inflammation-and-altered-ccr7-t-cell-expression-in-patients-with-ankylosing-spondylitis
#18
Joanna Sulicka, Andrzej Surdacki, Mariusz Korkosz, Tomasz Mikołajczyk, Magdalena Strach, Ewa Klimek, Tomasz Guzik, Tomasz Grodzicki
OBJECTIVES: The accumulation of CCR7 (chemokine receptor 7) positive cells in the vessel wall may be involved in endothelial dysfunction and subsequent accelerated atherogenesis. CCR7 plays a crucial role in T cell and monocyte migration/homing and in priming of naive T lymphocytes in non-lymphoid tissues in chronic inflammatory diseases. Our objective was to investigate the endothelial function and inflammation-driven expression of CCR7 on T lymphocytes in patients with ankylosing spondylitis (AS)...
April 18, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28420139/interplay-between-oxidative-stress-and-nutrient-sensing-signaling-in-the-developmental-origins-of-cardiovascular-disease
#19
REVIEW
You-Lin Tain, Chien-Ning Hsu
Cardiovascular disease (CVD) presents a global health burden, despite recent advances in management. CVD can originate from early life by so-called "developmental origins of health and disease" (DOHaD). Epidemiological and experimental evidence supports that early-life insults can induce programming of later CVD. Underlying the DOHaD concept, early intervention may offset programming process to prevent the development of CVD, namely reprogramming. Oxidative stress and nutrient sensing signals have been considered to be major mechanisms of cardiovascular programming, while the interplay between these two mechanisms have not been examined in detail...
April 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28392446/the-asymmetric-dimethylarginine-mediated-inhibition-of-nitric-oxide-in-the-rostral-ventrolateral-medulla-contributes-to-regulation-of-blood-pressure-in-hypertensive-rats
#20
Xing Tan, Ji-Kui Li, Jia-Cen Sun, Pei-Lei Jiao, Yang-Kai Wang, Zhao-Tang Wu, Bing Liu, Wei-Zhong Wang
Nitric oxide (NO) contributes to the central control of cardiovascular activity. The rostral ventrolateral medulla (RVLM) has been recognized as a pivotal region for maintaining basal blood pressure (BP) and sympathetic tone. It is reported that asymmetric dimethylarginine (ADMA), characterized as a cardiovascular risk marker, is an endogenous inhibitor of nitric oxide synthesis. The present was designed to determine the role of ADMA in the RVLM in the central control of BP in hypertensive rats. In Sprague Dawley (SD) rats, microinjection of ADMA into the RVLM dose-dependently increased BP, heart rate (HR), and renal sympathetic never activity (RSNA), but also reduced total NO production in the RVLM...
April 7, 2017: Nitric Oxide: Biology and Chemistry
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