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https://www.readbyqxmd.com/read/28904082/a-relative-l-arginine-deficiency-contributes-to-endothelial-dysfunction-across-the-stages-of-the-menopausal-transition
#1
Jelena Klawitter, Kerry L Hildreth, Uwe Christians, Wendy M Kohrt, Kerrie L Moreau
Vascular endothelial function declines across the menopause transition in women. We tested the hypothesis that reduced availability of the endothelial nitric oxide synthase [eNOS] substrate L-arginine is an underlying mechanism to vascular endothelial dysfunction across menopause stages. Endothelial function (brachial artery flow-mediated dilation [FMD]) and plasma markers of L-arginine metabolism (citrulline, N(G)-mono-methyl-ւ-arginine [L-NMMA] asymmetric dimethylarginine [ADMA] and N(G)-N('G)-dimethyl-l-arginine [SDMA]), were measured in 129 women: 36 premenopausal (33 ± 7 years), 16 early- (49 ± 3 years) or 21 late- (50 ± 4 years) perimenopausal, and 21 early- (55 ± 3 years) or 35 late- (61 ± 4 years) postmenopausal...
September 2017: Physiological Reports
https://www.readbyqxmd.com/read/28894553/effect-of-alpha-lipoic-acid-on-asymmetric-dimethylarginine-and-disability-in-multiple-sclerosis-patients-a-randomized-clinical-trial
#2
Mohammad Khalili, Madjid Soltani, Shirin Amiri Moghadam, Parvin Dehghan, Amirreza Azimi, Omid Abbaszadeh
BACKGROUND: Multiple Sclerosis (MS) is an inflammatory and demyelinating disease of the central nervous system. Oxidative stress plays a major role in the onset and progression of MS. Asymmetric dimethylarginine (ADMA) formation is dependent on oxidative stress status. OBJECTIVE: We examined whether alpha-lipoic acid (ALA) as a potent antioxidant could improve the Expanded Disability Status Scale (EDSS) and decrease plasma level of ADMA in multiple sclerosis patients...
July 2017: Electronic Physician
https://www.readbyqxmd.com/read/28865488/distinct-transcriptional-and-metabolic-profiles-associated-with-empathy-in-buddhist-priests-a-pilot-study
#3
Junji Ohnishi, Satoshi Ayuzawa, Seiji Nakamura, Shigeko Sakamoto, Miyo Hori, Tomoko Sasaoka, Eriko Takimoto-Ohnishi, Masakazu Tanatsugu, Kazuo Murakami
BACKGROUND: Growing evidence suggests that spiritual/religious involvement may have beneficial effects on both psychological and physical functions. However, the biological basis for this relationship remains unclear. This study explored the role of spiritual/religious involvement across a wide range of biological markers, including transcripts and metabolites, associated with the psychological aspects of empathy in Buddhist priests. METHODS: Ten professional Buddhist priests and 10 age-matched non-priest controls were recruited...
September 2, 2017: Human Genomics
https://www.readbyqxmd.com/read/28863028/associations-of-plasma-nitrite-l-arginine-and-asymmetric-dimethylarginine-with-morbidity-and-mortality-in-patients-with-necrotizing-soft-tissue-infections
#4
Marco Bo Hansen, Lars Simon Rasmussen, Peter Garred, Katrine Pilely, Anna Mygind Wahl, Anders Perner, Martin Bruun Madsen, Elise Røge Hedegaard, Ulf Simonsen, Ole Hyldegaard
BACKGROUND: The nitric oxide system could play an important role in the pathophysiology related to necrotizing soft tissue infection (NSTI). Accordingly, we investigated the association between plasma nitrite level at admission and the presence of septic shock in patients with NSTI. We also evaluated the association between nitrite, asymmetric dimethylarginine (ADMA), L-arginine, L-arginine/ADMA-ratio and outcome. METHODS: We analyzed plasma from 141 NSTI patients taken upon hospital admission...
August 31, 2017: Shock
https://www.readbyqxmd.com/read/28852826/asymmetric-dimethylarginine-predicts-long-term-outcome-in-patients-with-acute-exacerbation-of-chronic-obstructive-pulmonary-disease
#5
Alaadin Vögeli, Manuel Ottiger, Marc A Meier, Christian Steuer, Luca Bernasconi, Andreas Huber, Mirjam Christ-Crain, Christoph Henzen, Claus Hoess, Robert Thomann, Werner Zimmerli, Beat Mueller, Philipp Schuetz
INTRODUCTION: In chronic obstructive pulmonary disease (COPD), there is an activation of the L-arginine nitric oxide pathway. Pulmonary obstruction causes to elevated nitric oxide (NO) levels, which lead to higher production of the NO-inhibiting metabolites asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA). METHODS: We investigated the association of L-arginine, ADMA, and SDMA with clinical outcomes in a well-defined observational cohort of 150 patients with acute exacerbation of COPD...
August 29, 2017: Lung
https://www.readbyqxmd.com/read/28851525/application-of-a-new-procedure-for-liquid-chromatography-mass-spectrometry-profiling-of-plasma-amino-acid-related-metabolites-and-untargeted-shotgun-proteomics-to-identify-mechanisms-and-biomarkers-of-calcific-aortic-stenosis
#6
Mariola Olkowicz, Janusz Debski, Patrycja Jablonska, Michal Dadlez, Ryszard T Smolenski
Calcific aortic valve stenosis (CAS) increasingly affects our ageing population, but the mechanisms of the disease and its biomarkers are not well established. Recently, plasma amino acid-related metabolite (AA) profiling has attracted attention in studies on pathology and development of biomarkers of cardiovascular diseases, but has not been studied in CAS. To evaluate the potential relationship between CAS and AA metabolome, a new ion-pairing reversed-phase liquid chromatography-tandem mass spectrometry (IP-RPLC-MS/MS) method has been developed and validated for simultaneous determination of 43 AAs in plasma of stenotic patients and age-matched control subjects...
September 29, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28841341/systemic-vascular-resistance-and-endogenous-inhibitors-of-nitric-oxide-synthesis-in-early-compared-to-late-onset-preeclampsia-preliminary-findings
#7
Miha Lucovnik, Helmut Karl Lackner, Ilona Papousek, Karin Schmid-Zalaudek, Guenter Schulter, Andreas Roessler, Manfred Georg Moertl
OBJECTIVE: To examine systemic vascular resistance index (SVRI), asymmetric (ADMA) and symmetric dimethylarginine (SDMA) levels in preeclampsia at different gestations. METHODS: Twenty-four preeclamptic patients (14 at ≥ 34 weeks') and 72 matched healthy controls were included. SVRI was calculated from impedance cardiography measurements. ADMA and SDMA levels were determined using enzyme-linked immunosorbent assay. RESULTS: SVRI and SDMA were higher in preeclampsia overall, in early onset and late onset compared to controls...
August 2017: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/28840593/a-pilot-study-with-flow-mediated-skin-fluorescence-a-novel-device-to-assess-microvascular-endothelial-function-in-coronary-artery-disease
#8
Maria Tarnawska, Karolina Dorniak, Mariusz Kaszubowski, Maria Dudziak, Marcin Hellmann
BACKGROUND: Endothelial dysfunction is one of the earliest vascular manifestations in the pathogenesis of cardiovascular disease. Noninvasive, simple and inexpensive methods of endothelial function assessment are therefore needed. METHODS: Microvascular endothelial function was assessed in coronary artery disease (CAD) patients by flow mediated skin fluorescence (FMSF), based on measurements of NADH fluorescence intensity during brachial artery occlusion (ischemic response [IRmax]) and immediately after occlusion (hyperemic response [HRmax])...
August 25, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28833317/effects-of-propolis-caffeic-acid-phenethyl-ester-and-pollen-on-renal-injury-in-hypertensive-rat-an-experimental-and-theoretical-approach
#9
Ramin Ekhteiari Salmas, Mehmet Fuat Gulhan, Serdar Durdagi, Engin Sahna, Huda I Abdullah, Zeliha Selamoglu
The objective of this study was to evaluate the antioxidant effects of propolis, caffeic acid phenethyl ester (CAPE; active compound in propolis), and pollen on biochemical oxidative stress biomarkers in rat kidney tissue inhibited by N(ω) -nitro-L-arginine methyl ester (L-NAME). The biomarkers evaluated were paraoxonase (PON1), oxidative stress index (OSI), total antioxidant status (TAS), total oxidant status (TOS), asymmetric dimethylarginine (ADMA), and nuclear factor kappa B (NF-κB). TAS levels and PON1 activity were significantly decreased in kidney tissue samples in the L-NAME-treated group (P < 0...
August 22, 2017: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/28831582/asymmetric-dimethylarginine-and-symmetric-dimethylarginine-prospectively-relates-to-carotid-wall-thickening-in-black-men-the-sabpa-study
#10
Catharina M C Mels, A E Schutte, H W Huisman, W Smith, R Kruger, J M van Rooyen, E Schwedhelm, D Atzler, R H Böger, N T Malan, L Malan
The relationship of both asymmetric (ADMA) and symmetric (SDMA) dimethylarginine with carotid wall thickness is inconclusive especially among black populations. We aimed to compare carotid intima media thickness (cIMT) and dimethylarginine levels in 75 black and 91 white men at baseline and after a 3-year follow-up, and to investigate associations of percentage change in cIMT with percentage change in dimethylarginine levels (ADMA and SDMA). Plasma levels of ADMA and SDMA were determined with a liquid chromatography mass spectrometry method and B-mode ultrasonography was used to determine the cIMT at baseline and follow-up...
August 22, 2017: Amino Acids
https://www.readbyqxmd.com/read/28821001/influence-on-serum-asymmetric-dimethylarginine-adma-concentrations-of-human-paraoxonase-1-polymorphism-q192r-and-exposure-to-polycyclic-aromatic-hydrocarbons-pahs-in-mexican-women-a-gene-environment-interaction
#11
Ángeles C Ochoa-Martínez, Tania Ruíz-Vera, Claudia I Almendarez-Reyna, Sandra T Orta-García, Iván N Pérez-Maldonado
It has been demonstrated that Cardiovascular Diseases (CVD) are a consequence of the combination of genetic and environmental factors and/or the interaction between them. Therefore, the aim of this study was to evaluate the impact of polycyclic aromatic hydrocarbon (PAHs) exposure and PON1 Q192R polymorphism (genetic susceptibility) on serum asymmetric dimethylarginine (ADMA) levels in Mexican women (n = 206). Urinary 1-hydroxypyrene concentrations (1-OHP; exposure biomarker for PAHs) were quantified using a high-performance liquid chromatography technique, PON1 Q192R polymorphism was genotyped using TaqMan probes and serum ADMA concentrations were evaluated using a commercially available ELISA kit...
November 2017: Chemosphere
https://www.readbyqxmd.com/read/28819685/cardiomyocyte-dimethylarginine-dimethylaminohydrolase-1-ddah1-plays-an-important-role-in-attenuating-ventricular-hypertrophy-and-dysfunction
#12
Xin Xu, Ping Zhang, Dongmin Kwak, John Fassett, Wenhui Yue, Dorothee Atzler, Xinli Hu, Xiaohong Liu, Huan Wang, Zhongbing Lu, Haipeng Guo, Edzard Schwedhelm, Rainer H Böger, Peijie Chen, Yingjie Chen
Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthases that limits nitric oxide bioavailability. Dimethylarginine dimethylaminohydrolase-1 (DDAH1) exerts a critical role for ADMA degradation and plays an important role in NO signaling. In the heart, DDAH1 is observed in endothelial cells and in the sarcolemma of cardiomyocytes. While NO signaling is important for cardiac adaptation to stress, DDAH1 impact on cardiomyocyte homeostasis is not clear. Here we used the MerCreMer-LoxP model to specifically disrupt cardiomyocyte DDAH1 expression in adult mice to determine the physiological impact of cardiomyocyte DDAH1 under basal conditions and during hypertrophic stress imposed by transverse aortic constriction (TAC)...
August 17, 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28813479/metabolomic-profiling-of-amines-in-sepsis-predicts-changes-in-nos-canonical-pathways
#13
Abel Tesfai, Niall MacCallum, Nicholas S Kirkby, Hime Gashaw, Nicola Gray, Elizabeth Want, Gregory J Quinlan, Sharon Mumby, James M Leiper, Mark Paul-Clark, Blerina Ahmetaj-Shala, Jane A Mitchell
RATIONALE: Nitric oxide synthase (NOS) is a biomarker/target in sepsis. NOS activity is driven by amino acids, which cycle to regulate the substrate L-arginine in parallel with cycles which regulate the endogenous inhibitors ADMA and L-NMMA. The relationship between amines and the consequence of plasma changes on iNOS activity in early sepsis is not known. OBJECTIVE: Our objective was to apply a metabolomics approach to determine the influence of sepsis on a full array of amines and what consequence these changes may have on predicted iNOS activity...
2017: PloS One
https://www.readbyqxmd.com/read/28811749/acute-cocoa-flavanols-intake-has-minimal-effects-on-exercise-induced-oxidative-stress-and-nitric-oxide-production-in-healthy-cyclists-a-randomized-controlled-trial
#14
Lieselot Decroix, Cajsa Tonoli, Danusa Dias Soares, Amandine Descat, Marie-José Drittij-Reijnders, Antje R Weseler, Aalt Bast, Wilhelm Stahl, Elsa Heyman, Romain Meeusen
BACKGROUND: Cocoa flavanols (CF) can stimulate vasodilation by improved nitric oxide (NO) synthesis and have antioxidant and anti-inflammatory capacities. This study aimed to examine whether acute CF intake can affect exercise-induced changes in antioxidant capacity, oxidative stress, inflammation and NO production, as well as exercise performance and recovery in well-trained cyclists. METHODS: Twelve well-trained male cyclists (mean ± SD age, VO2max: 30 ± 3 years, 63...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28808139/differential-expression-of-sirtuin-2-and-adipocyte-maturation-restriction-an-adaptation-process-during-hypoxia-in-fish
#15
Padmini Ekambaram, Parimala Parasuraman
Sirtuins have received widespread attention due to their diverse physiological role in metabolism. Among sirtuins, SIRT2 is more abundant in adipocytes and exerts effects on adipocyte differentiation, a process which involves conversion of preadipocytes to mature adipocytes orchestrated by adipokines and adipogenic transcription factors. Grey mullet (Mugil cephalus) was chosen as a study organism due to its excellent service as a biomonitor. Adipocytes isolated from natural field conditions were termed as field-hypoxic (Ennore) and -normoxic (Kovalam) based on dissolved oxygen (DO) level in the estuary...
September 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28780342/e-selectin-and-sicam-1-biomarkers-of-endothelial-function-predict-recurrence-of-venous-thromboembolism
#16
Olga Dzikowska-Diduch, Justyna Domienik-Karłowicz, Elżbieta Górska, Urszula Demkow, Piotr Pruszczyk, Maciej Kostrubiec
BACKGROUND: Risk factors for atherosclerosis and venous thromboembolism (VTE) overlap and are mostly associated with endothelial dysfunction (ED). We hypothesized that ED is present in patients after the first episode of acute pulmonary embolism (APE) and predicts the risk of VTE recurrence. DESIGN AND METHODS: Patients, at least 6months after the first episode of symptomatic, confirmed APE were included in this case-control study. The exclusion criteria were risk factors for cardiovascular diseases and other conditions associated with endothelial dysfunction...
July 26, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28777303/novel-biomarkers-in-the-diagnosis-of-chronic-kidney-disease-and-the-prediction-of-its-outcome
#17
REVIEW
Jacek Rysz, Anna Gluba-Brzózka, Beata Franczyk, Zbigniew Jabłonowski, Aleksandra Ciałkowska-Rysz
In its early stages, symptoms of chronic kidney disease (CKD) are usually not apparent. Significant reduction of the kidney function is the first obvious sign of disease. If diagnosed early (stages 1 to 3), the progression of CKD can be altered and complications reduced. In stages 4 and 5 extensive kidney damage is observed, which usually results in end-stage renal failure. Currently, the diagnosis of CKD is made usually on the levels of blood urea and serum creatinine (sCr), however, sCr has been shown to be lacking high predictive value...
August 4, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28770947/clinical-study-on-anti-epileptic-drug-with-b-vitamins-for-the-treatment-of-epilepsy-after-stroke
#18
H Zhou, N Wang, L Xu, H-L Huang, C-Y Yu
OBJECTIVE: To study the clinical value of anti-epileptic drugs combined with B vitamins in the treatment of epilepsy after stroke. PATIENTS AND METHODS: The study included 90 consecutive patients with epilepsy after stroke. Patients were randomly divided into groups of 30 each according to treatment: single-agent or combination anti-epileptic therapy with oxcarbazepine and sodium valproate (control group), anti-epileptic therapy with compound vitamin B tablets (observation group 1), and anti-epileptic therapy with vitamin B12 (mecobalamin) (observation group 2)...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28758620/antibodies-against-the-mono-methylated-arginine-glycine-repeat-mma-rg-of-the-epstein-barr-virus-nuclear-antigen-2-ebna2-identify-potential-cellular-proteins-targeted-in-viral-transformation
#19
Hiresh Ayoubian, Thomas Fröhlich, Dagmar Pogodski, Andrew Flatley, Elisabeth Kremmer, Aloys Schepers, Regina Feederle, Georg J Arnold, Friedrich A Grässer
The Epstein-Barr virus is a human herpes virus with oncogenic potential. The virus-encoded nuclear antigen 2 (EBNA2) is a key mediator of viral tumorigenesis. EBNA2 features an arginine-glycine (RG) repeat at amino acids (aa)339-354 that is essential for the transformation of lymphocytes and contains symmetrically (SDMA) and asymmetrically (ADMA) di-methylated arginine residues. The SDMA-modified EBNA2 binds the survival motor neuron protein (SMN), thus mimicking SMD3, a cellular SDMA-containing protein that interacts with SMN...
August 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28756635/can-adma-play-a-role-in-determining-pulmonary-hypertension-related-to-chronic-obstructive-pulmonary-disease
#20
Selda Telo, Gamze Kırkıl, Mutlu Kuluöztürk, Mehmet Balin, Figen Deveci
BACKGROUND AND AIMS: Asymmetric dimethylarginine (ADMA) decreases the levels of nitric oxide by inhibiting nitric oxide synthases. In this study, the possible role of ADMA in determining pulmonary hypertension (PH) in chronic obstructive pulmonary disease (COPD) patients was investigated. METHODS: Stable COPD patients who were admitted to pulmonology outpatient clinic were involved in the study. Forty healthy volunteers, with similar ages and sexes, were accepted as the control group...
July 29, 2017: Clinical Respiratory Journal
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