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https://www.readbyqxmd.com/read/29346429/the-farnesoid-x-receptor-agonist-obeticholic-acid-upregulates-biliary-excretion-of-asymmetric-dimethylarginine-via-mate-1-during-hepatic-ischemia-reperfusion-injury
#1
Andrea Ferrigno, Laura Giuseppina Di Pasqua, Clarissa Berardo, Veronica Siciliano, Vittoria Rizzo, Luciano Adorini, Plinio Richelmi, Mariapia Vairetti
BACKGROUND: We previously showed that increased asymmetric dimethylarginine (ADMA) biliary excretion occurs during hepatic ischemia/reperfusion (I/R), prompting us to study the effects of the farnesoid X receptor (FXR) agonist obeticholic acid (OCA) on bile, serum and tissue levels of ADMA after I/R. MATERIAL AND METHODS: Male Wistar rats were orally administered 10mg/kg/day of OCA or vehicle for 5 days and were subjected to 60 min partial hepatic ischemia or sham-operated...
2018: PloS One
https://www.readbyqxmd.com/read/29316724/biochemical-and-clinical-impact-of-organic-uremic-retention-solutes-a-comprehensive-update
#2
REVIEW
Raymond Vanholder, Anneleen Pletinck, Eva Schepers, Griet Glorieux
In this narrative review, the biological/biochemical impact (toxicity) of a large array of known individual uremic retention solutes and groups of solutes is summarized. We classified these compounds along their physico-chemical characteristics as small water-soluble compounds or groups, protein bound compounds and middle molecules. All but one solute (glomerulopressin) affected at least one mechanism with the potential to contribute to the uremic syndrome. In general, several mechanisms were influenced for each individual solute or group of solutes, with some impacting up to 7 different biological systems of the 11 considered...
January 8, 2018: Toxins
https://www.readbyqxmd.com/read/29308071/positive-correlation-of-airway-resistance-and-serum-asymmetric-dimethylarginine-adma-in-bronchial-asthma-patients-lacking-evidence-for-systemic-inflammation
#3
Gabor Tajti, Csaba Papp, Laszlo Kardos, Sandor Keki, Krisztian Pak, Magdolna Emma Szilasi, Rudolf Gesztelyi, Angela Mikaczo, Andrea Fodor, Maria Szilasi, Judit Zsuga
Background: Contribution of nitric-oxide (NO) pathway to the pathogenesis of bronchial asthma (asthma) is ambiguous as NO may confer both protective and detrimental effects depending on the NO synthase (NOS) isoforms, tissue compartments and underlying pathological conditions (e.g. systemic inflammation). Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor and uncoupler of NOS with distinct selectivity for NOS isoforms. In a cross-sectional study, we assessed whether ADMA is an independent predictor of airway resistance (Raw) in therapy-controlled asthma...
2018: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/29301528/asymmetric-dimethylarginine-adma-symmetric-dimethylarginine-sdma-and-homoarginine-harg-the-adma-sdma-and-harg-paradoxes
#4
EDITORIAL
Dimitrios Tsikas, Alexander Bollenbach, Erik Hanff, Arslan Arinc Kayacelebi
NG-Methylation of L-arginine (Arg) residues in certain proteins by protein arginine methyltransferases and subsequent proteolysis yields NG-monomethyl-L-arginine (MMA), NG,NG-dimethyl-L-arginine (asymmetric dimethylarginine, ADMA) and NG,N'G-dimethyl-L-arginine (symmetric dimethylarginine, SDMA). Biological MMA, ADMA and SDMA occur as free acids in the nM-range and as residues of proteins of largely unknown quantity. Arginine:glycine amidinotransferase (AGAT) catalyzes the synthesis of L-homoarginine (hArg) from free Arg and L-lysine...
January 4, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29258230/anti-atherogenic-activity-of-polyphenol-rich-extract-from-bee-pollen
#5
Anna Rzepecka-Stojko, Jerzy Stojko, Krzysztof Jasik, Ewa Buszman
The aim of this study was to determine the effect of polyphenol-rich ethanol extract of bee pollen (EEP) on atherosclerosis induced by a high-fat diet in ApoE-knockout mice. EEP was given with feed in two doses of 0.1 and 1 g/kg body mass (BM). The studies have been conducted in a period of 16 weeks. The following factors were estimated: total cholesterol (TC), oxidized low density lipoproteins (ox-LDL), asymmetric dimethylarginine (ADMA), angiotensin-converting enzyme (ACE) and angiotensin II (ANG II) in the 5th, 10th, 12th, 14th, and 16th week of the experiment...
December 18, 2017: Nutrients
https://www.readbyqxmd.com/read/29245966/digenic-mutations-on-scap-and-agxt2-predispose-to-premature-myocardial-infarction
#6
Yuanfeng Gao, Chongyou Lee, Junxian Song, Sufang Li, Yuxia Cui, Yongzhen Liu, Jie Wang, Fengmin Lu, Hong Chen
Genetic factors play a vital role in the pathogenesis of premature myocardial infarction (PMI). However, current studies explained only small amounts of genetic risk in MI. In this study, we started from a PMI pedigree with three MI patients occurred at the age of 43, 45 and 53 respectively. Sanger sequencing revealed 6 LDLR mutation carriers in the family, but only one was diagnosed with PMI, indicating that the LDLR mutation may not be the reason for PMI. Upon exome-sequencing and bioinformatics analysis, two variants in SCAP and AGXT2 were identified as potential causative mutation for PMI...
November 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/29244159/pre-clinical-model-of-severe-glutathione-peroxidase-3-deficiency-and-chronic-kidney-disease-results-in-coronary-artery-thrombosis-and-depressed-left-ventricular-function
#7
Paul Pang, Molly Abbott, Malyun Abdi, Quynh-Anh Fucci, Nikita Chauhan, Murti Mistri, Brandon Proctor, Matthew Chin, Bin Wang, Wenqing Yin, Tzong-Shi Lu, Arvin Halim, Kenneth Lim, Diane E Handy, Joseph Loscalzo, Andrew M Siedlecki
Background: Chronic kidney disease (CKD) patients have deficient levels of glutathione peroxidase-3 (GPx3). We hypothesized that GPx3 deficiency may lead to cardiovascular disease in the presence of chronic kidney disease due to an accumulation of reactive oxygen species and decreased microvascular perfusion of the myocardium. Methods: To isolate the exclusive effect of GPx3 deficiency in kidney disease-induced cardiac disease, we studied the GPx3 knockout mouse strain (GPx3-/-) in the setting of surgery-induced CKD...
December 13, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29240677/amniotic-fluid-arginine-from-gestational-weeks-13-to-15-is-a-predictor-of-birth-weight-length-and-head-circumference
#8
Astrid Bjørke-Jenssen, Per Magne Ueland, Anne-Lise Bjørke-Monsen
Arginine is a constituent of proteins and a precursor for polyamines and nitric oxide, and is essential for placentation, angiogenesis, and growth. Maternal plasma arginine concentrations are found to be lower in pregnancies complicated by fetal growth restriction, and arginine supplementation in later pregnancy is reported to increase birth weight. We measured arginine and the metabolites asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA) in the amniotic fluid obtained in pregnancy weeks 13 to 15 from 363 pregnancies with a documented normal outcome and related the concentrations to birth weight, length, and head circumference...
December 14, 2017: Nutrients
https://www.readbyqxmd.com/read/29237474/dimethylarginines-in-patients-with-intracerebral-hemorrhage-association-with-outcome-hematoma-enlargement-and-edema
#9
Hans Worthmann, Na Li, Jens Martens-Lobenhoffer, Meike Dirks, Ramona Schuppner, Ralf Lichtinghagen, Jan T Kielstein, Peter Raab, Heinrich Lanfermann, Stefanie M Bode-Böger, Karin Weissenborn
BACKGROUND: Asymmetric dimethylarginine (ADMA)--the most potent endogenous NO-synthase inhibitor, has been regarded as mediator of endothelial dysfunction and oxidative stress. Considering experimental data, levels of ADMA and its structural isomer symmetric dimethylarginine (SDMA) might be elevated after intracerebral hemorrhage (ICH) and associated with clinical outcome and secondary brain injury. METHODS: Blood samples from 20 patients with acute ICH were taken at ≤ 24 h and 3 and 7 days after the event...
December 13, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29235018/inverse-correlation-between-maternal-plasma-asymmetric-dimethylarginine-adma-and-birthweight-percentile-in-women-with-impaired-placental-perfusion-circulating-adma-as-an-no-independent-indicator-of-fetal-growth-restriction
#10
Dimitrios Tsikas, Alexander Bollenbach, Makrina D Savvidou
L-Arginine (Arg) is the enzymatic precursor of nitric oxide (NO) which has multiple biological functions. Asymmetric dimethylarginine (ADMA) and symmetric dimethylarginine (SDMA) are endogenous inhibitors of NO. We hypothesized that the ADMA and SDMA have additional biological functions in pregnancy, beyond NO synthesis, and may play a role in the regulation of birthweight (BW). To investigate this issue, we measured the plasma concentration of ADMA, SDMA, Arg and the NO metabolites nitrite and nitrate, at 23-25 weeks of gestation in women with normal placental function (Group 1) and in women with impaired placental perfusion; 19 of these women had normal outcome (Group 2), 14 had a fetus that was growth restricted (Group 3), and 10 women eventually developed preeclampsia (Group 4)...
December 12, 2017: Amino Acids
https://www.readbyqxmd.com/read/29222858/obesity-lipid-profiles-and-oxidative-stress-in-children-after-liver-transplantation
#11
Piotr Czubkowski, Aldona Wierzbicka, Joanna Pawłowska, Irena Jankowska, Piotr Socha
PURPOSE: In adult liver transplant recipients, coronary artery disease and congestive heart failure are significant cause of morbidity and mortality. This may be attributed to the long-term immunosuppressive treatment, mostly with calcineurin inhibitors and steroids, which in long-term may be associated with hyperlipidemia, oxidative stress and cardiovascular complications. Since such data for children is sparse, the aim of this study was to assess the lipid and oxidative stress markers after pediatric liver transplantation (LTx)...
December 10, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/29218448/how-does-spa-treatment-affect-cardiovascular-function-and-vascular-endothelium-in-patients-with-generalized-osteoarthritis-a-pilot-study-through-plasma-asymmetric-di-methyl-arginine-adma-and-l-arginine-adma-ratio
#12
Fatih Karaarslan, Kagan Ozkuk, Serap Seringec Karabulut, Seldag Bekpinar, Mufit Zeki Karagulle, Nergis Erdogan
The study aims to investigate the effect of spa treatment on vascular endothelium and clinical symptoms of generalized osteoarthritis. Forty generalized osteoarthritis (GOA) patients referred to a government spa hospital, and 40 GOA patients followed on university hospital locomotor system disease ambulatory clinics were included as study and control groups, respectively. Study group received spa treatment including thermal water baths, physical therapy modalities, and exercises. Control group was followed with home exercises for 15 days...
December 7, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29207392/distinct-roles-of-endothelial-dysfunction-and-inflammation-in-intracranial-atherosclerotic-stroke
#13
Jong-Won Chung, Mi Jeong Oh, Yeon Hee Cho, Gyeong Joon Moon, Gyeong-Moon Kim, Chin-Sang Chung, Kwang Ho Lee, Oh Young Bang
BACKGROUND/AIMS: The aim of the study was to evaluate the differential roles of endothelial dysfunction and inflammation in intracranial atherosclerotic stroke (ICAS). METHODS: We prospectively recruited 262 patients with acute cerebral infarcts caused by ICAS and 75 individuals with no history of stroke as controls. Markers of endothelial dysfunction (asymmetric dimethylarginine, ADMA) and inflammation (lipoprotein-associated phospholipase A2, Lp-PLA2) were measured...
2017: European Neurology
https://www.readbyqxmd.com/read/29207068/role-of-ddah-adma-pathway-in-tgf-%C3%AE-1-mediated-activation-of-hepatic-stellate-cells
#14
Zhenguo Liu, Juan Wang, Wu Xing, Yingqiong Peng, Yan Huang, Xuegong Fan
Asymmetric dimethylarginine (ADMA) is catalyzed by the enzyme dimethylarginine dimethylaminohydrolase (DDAH) in humans, and the role for ADMA has been associated with hepatic fibrogenesis. Transforming growth factor‑β (TGF‑β) has been shown to mediate the myofibroblastic transformation of quiescent hepatic stellate cells (HSCs), a pivotal step in liver fibrogenesis. However, the underlying molecular mechanisms are not well understood. Accumulation of ADMA due to low activity of DDAH has been reported to be associated with liver damage and hepatic fibrosis...
November 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29206850/the-prognostic-value-of-asymmetric-dimethylarginine-in-patients-with-cardiac-syndrome-x
#15
Tse-Min Lu, Tzong-Shyuan Lee, Shing-Jong Lin, Wan-Leong Chan, Chiao-Po Hsu
BACKGROUND: The pathophysiology of cardiac syndrome X is multifactorial and endothelial dysfunction has been implicated as important contributing factor. Asymmetric dimethylarginine (ADMA), characterized as a circulating endogenous inhibitor of nitric oxide synthase, may have been implicated as an important contributing factor for the development of endothelial dysfunction. In this study, we aim to assess the predictive power of ADMA for long-term prognosis in patients with cardiac syndrome X...
2017: PloS One
https://www.readbyqxmd.com/read/29205940/relation-of-serum-adma-apelin-13-and-lox-1-levels-with-inflammatory-and-echocardiographic-parameters-in-hemodialysis-patients
#16
Ibrahim Dogan, Tolga Dogan, Mucahit Yetim, Huseyin Kayadibi, Mehmet B Yilmaz, Baris Eser, Macit Kalcik, Yusuf Karavelioglu
Cardiovascular diseases are the leading causes of mortality in patients with chronic kidney disease. Nitric oxide has a critical role in both endothelial dysfunction and the atherosclerosis process. We aimed to investigate the relationships between serum asymmetric dimethyl arginine (ADMA), LOX-1, and Apelin-13 levels, which are known to act over nitric oxide with endothelial dysfunction and cardiac morphology as well as with each other in hemodialysis patients. The study comprised a total of 120 patients (53 females and 67 males) receiving hemodialysis three times a week for at least 6 months and an age-gender matched control group (55 females and 58 males)...
December 4, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/29202210/differential-effects-on-haemostatic-markers-by-metformin-and-the-contraceptive-pill-a-randomized-comparative-trial-in-pcos
#17
Genia F Burchall, Terrence J Piva, Sanjeeva Ranasinha, Helena J Teede
Background Polycystic ovarian syndrome (PCOS) affects up to 18% of reproductive-aged women with increased risks of cardiovascular disease and venous thromboembolic disease, related to metabolic and hormonal features, obesity and an apparent hypofibrinolytic state, possibly exacerbated by current PCOS treatments. Objective To investigate and compare haemostatic impacts of common pharmacological treatments and explore relationships with hormonal and metabolic variables in PCOS. Patients/Methods This mechanistic sub-study using biobanked samples from a 6-month randomized comparative trial of pharmacological treatments assessed pro- and anti-thrombotic markers and overall haemostatic activity...
November 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29198509/testosterone-deficiency-causes-endothelial-dysfunction-via-elevation-of-asymmetric-dimethylarginine-and-oxidative-stress-in-castrated-rats
#18
Tomoya Kataoka, Yuji Hotta, Yasuhiro Maeda, Kazunori Kimura
BACKGROUND: Testosterone is believed to mediate the penile erectile response by producing adequate nitric oxide; therefore, testosterone deficiency results in erectile dysfunction through decreased nitric oxide bioavailability. However, the mechanisms underlying endothelial dysfunction in testosterone deficiency remain unclear. AIM: To investigate the mechanism of endothelial dysfunction in a rat model of testosterone deficiency. METHODS: Rats were distributed into 3 groups: castrated (Cast), castrated and supplemented with testosterone (Cast + T), and sham (Sham)...
December 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29187460/adjuvant-breast-cancer-treatments-induce-changes-in-homoarginine-level-a-prospective-observational-study
#19
Hanna Aula, Tanja Skyttä, Suvi Tuohinen, Tiina Luukkaala, Mari Hämäläinen, Vesa Virtanen, Pekka Raatikainen, Eeva Moilanen, Pirkko-Liisa Kellokumpu-Lehtinen
AIM: To identify patients with breast cancer at risk for cardiotoxicity, we evaluated homoarginine (HA) behavior during adjuvant treatment. PATIENTS AND METHODS: Eighty-one patients received radiotherapy (RT) with or without endocrine treatment, and 19 received chemotherapy, RT and endocrine therapy. Serum HA, asymmetric dimethylarginine (ADMA) and high-sensitivity cardiac troponin T (hscTnT) were measured and echocardiography was performed before chemotherapy, and before and after RT...
December 2017: Anticancer Research
https://www.readbyqxmd.com/read/29167164/nrf2-prevents-hypertension-increased-adma-microvascular-oxidative-stress-and-dysfunction-in-mice-with-two-weeks-of-angiotensin-ii-infusion
#20
Cheng Wang, Zaiming Luo, Gabriella Carter, Anton Wellstein, Pedro A Jose, James Tomlinson, James Leiper, William J Welch, Christopher S Wilcox, Dan Wang
Nuclear factor erythyroid factor 2 (Nrf2) transcribes genes in cultured endothelial cells that reduce reactive oxygen species (ROS) and generate nitric oxide (NO) or metabolize asymmetric dimethylarginine (ADMA) that inhibits NO synthase (NOS). Therefore, we undertook a functional study to test the hypothesis that activation of Nrf2 by tert-butylhydroquinone (tBHQ) preserves microvascular endothelial function during oxidative stress. Wild-type CB57Bl/6 (wt), Nrf2 wt (+/+), or knockout (-/-) mice received vehicle (Veh) or tBHQ (0...
November 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
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