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paraoxonase 1

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https://www.readbyqxmd.com/read/29789355/hdl-functionality-and-cardiovascular-outcome-among-non-dialysis-chronic-kidney-disease-patients
#1
Kathrin Untersteller, Sabine Meissl, Markus Trieb, Insa Emrich, Adam Zawada, Michael Holzer, Eva Knuplez, Danilo Fliser, Gunnar Heine, Gunther Marsche
Cardiovascular disease remains the leading cause of morbidity and mortality in patients with chronic kidney disease (CKD). CKD profoundly affects high-density lipoprotein (HDL) composition and functionality, but if abnormal HDL independently contributes to cardiovascular events in CKD patients remains elusive. In the present study, we assessed whether compositional and functional properties of HDL predict cardiovascular outcome among 526 non-dialysis CKD patients who participate in the CARE FOR HOMe study. We measured HDL cholesterol, the content of HDL-associated pro-inflammatory serum amyloid A (SAA) and activities of the HDL enzymes paraoxonase and lipoprotein associated phospholipase A2 (Lp-PLA2)...
May 22, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29782842/paraoxonase-1-pon1-l55m-among-common-variants-in-the-coding-region-of-the-paraoxonase-gene-family-may-contribute-to-the-glycemic-control-in-type-2-diabetes
#2
Abdolkarim Mahrooz, Mohammad Bagher Hashemi-Soteh, Masoud Heydari, Ruzbeh Boorank, Fatemeh Ramazani, Ali Mahmoudi, Anvarsadat Kianmehr, Ahad Alizadeh
OBJECTIVE: Genome studies have shown that the genes encoding paraoxonase 1 (PON1) and PON2 are associated with glucose metabolism. The goal of this study was to simultaneously evaluate the association between functional variants in PON1 and PON2 genes and susceptibility for type 2 diabetes (T2D) and determine whether they can affect glycemic control. METHODS: We performed a case-control study with 145 newly diagnosed patients with T2D and 148 controls. The common variants including PON1-Q192R, PON1-L55M and PON2-S311C were genotyped by PCR-based RFLP...
May 18, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29782204/paraoxonase-1-q192r-genotype-and-activity-affect-homocysteine-thiolactone-levels-in-humans
#3
Joanna Perła-Kaján, Kamila Borowczyk, Rafał Głowacki, Ottar Nygård, Hieronim Jakubowski
Genetic or nutritional deficiencies in 1 carbon and homocysteine (Hcy) metabolism elevate Hcy-thiolactone levels and are associated with cardiovascular and neurologic diseases. Hcy-thiolactone causes protein damage, cellular toxicity, and proatherogenic changes in gene expression in human cells and tissues. A polymorphic cardio-protective enzyme, paraoxonase 1 (PON1), hydrolyzes Hcy-thiolactone in vitro. However, whether Hcy-thiolactone hydrolysis is a physiologic function of the PON1 protein and whether polymorphisms in the PON1 gene affect Hcy-thiolactone levels in humans was unknown...
May 21, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29781759/development-of-simultaneous-quantification-method-of-loteprednol-etabonate-le-and-its-acidic-metabolites-and-analysis-of-le-metabolism-in-rat
#4
Ahmed Samir, Ayano Kage, Ohura Kayoko, Teruko Imai
1. Loteprednol etabonate (LE) is a soft corticosteroid with two labile ester bonds at 17α- and 17β-positions. Its corticosteroidal activity disappears upon hydrolysis of either ester bond. Hydrolysis of both ester bonds produces the inactive metabolite, Δ1 -cortienic acid (Δ1 -CA). 2. The simple high performance liquid chromatography method using acetic acid gradient was developed for the simultaneous determination of LE and its acidic metabolites. 3. LE was hydrolyzed in rat plasma with a half-life of 9 minutes...
May 21, 2018: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/29778552/alterations-in-oxidative-stress-markers-in-laryngeal-carcinoma-patients
#5
Nazim Bozan, Halit Demir, Tülay Gürsoy, Hüseyin Özkan, Ufuk Düzenli, Eren Sarıkaya, Mahfuz Turan, Ahmet Faruk Kiroglu, Hakan Çankaya
BACKGROUND: Data describing how laryngeal cancer affects oxidative stress markers and antioxidants are limited. This study investigated serum antioxidant enzyme activities and oxidative stress markers before and after laryngectomies in patients with laryngeal cancer. METHODS: A total of 29 patients with laryngeal cancer and 25 healthy control subjects were enrolled. Serum malondialdehyde (MDA) levels and superoxide dismutase (SOD), glutathione peroxidase (GSHPx), catalase (CAT), paraoxonase (PON), and arylesterase activities were measured spectrophotometrically...
May 16, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29773198/serum-concentrations-of-trace-elements-and-their-relationships-with-paraoxonase-1-in-morbidly-obese-women
#6
Fedra Luciano-Mateo, Noemí Cabré, Martí Nadal, Anabel García-Heredia, Gerard Baiges-Gaya, Anna Hernández-Aguilera, Jordi Camps, Jorge Joven, José Luis Domingo
The metabolic alterations associated with obesity include mineral dysregulation. Essential trace elements are nutrients with a relevant function in a large number of cellular processes and multiple roles in the correct functioning of metabolic enzymes. Paraoxonase-1 (PON1) is an antioxidant and anti-inflammatory enzyme that is compromised in obesity. In the present study, the potential alterations in trace elements in morbidly obese women were assessed in relation to serum PON1 activity and concentration, as well as to other obesity-related comorbidities such as diabetes mellitus and fatty liver...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29773067/in-silico-molecular-docking-and-adme-studies-of-1-3-4-thiadiazole-derivatives-in-relation-to-in-vitro-pon1-activity
#7
Belgin Sever, Kaan Kucukoglu, Hayrunnisa Nadaroglu, Mehlika Dilek Altintop
BACKGROUND: Paraoxonase 1 (PON1) is a paraoxonase, arylesterase and lactonase associated with protection of lipoproteins and cell membranes against oxidative modification. OBJECTIVE: Based on antioxidative properties of PON1 and widely usage of 1,3,4-thiadiazole derivatives in pharmaceutical, agricultural, and materials chemistry, herein we aimed to evaluate PON1 activator potentials of 1,3,4-thiadiazole based compounds. METHOD: 2-[[5-(2,4-Difluoro/dichlorophenylamino)-1,3,4-thiadiazol-2-yl]thio] acetophenone derivatives (1-18), previously synthesized by our research group, were in vitro evaluated for their activator effects on PON1 which was purified using ammonium sulfate precipitation (60-80%) and DEAE-Sephadex anion exchange chromatography...
May 17, 2018: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/29772998/partially-purified-aqueous-fraction-of-desmodium-gyrans-dc-improves-reverse-cholesterol-transport-and-lipoprotein-metabolism-in-wistar-rats-fed-with-high-fat-diet
#8
M S Indu, Jose Padikkala, Achuthan C Raghavamenon
Apart from the conventional hypolipidemic therapy, plaque regression through enhanced reverse cholesterol transport (RCT) has emerged as novel approach in atherosclerotic drug development. High-density lipoprotein (HDL) mimetics as well as agents that augment the functional HDL and RCT pathways are under intense exploration. Desmodium gyrans (Fabacea) has been shown to have hypolipidemic efficacy, with an HDL-enhancing property. In this study, a chromatographically purified active fraction of D. gyrans (DGMAF) significantly decreased the serum and lipid profiles as well as lipotoxicity in liver in Wistar rats fed with high-fat diet (HFD)...
2018: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/29768876/protection-by-neostigmine-and-atropine-against-brain-and-liver-injury-induced-by-acute-malathion-exposure
#9
Omar M E Abdel-Salam, Eman R Youness, Reham Shehab ElNemr Esmail, Nadia A Mohammed, Yasser A Khadrawy, Amany A Sleem, Amany Mamdouh Abdulaziz
We examined the effect of treatment with neostigmine alone or with atropine on brain oxidative stress and on brain and liver tissue damage following acute malathion toxicity. Rats were intraperitoneally treated with malathion 150 mg/kg along with neostigmine (200 or 400 μg/kg) or neostigmine (200 μg/kg) + atropine (1 mg/kg) and euthanized 4 h later. Results indicated that compared with the saline group, malathion resulted in (i) higher brain malondialdehyde (MDA) and nitric oxide (46.4% and 86.2%); (ii) decreased brain reduced glutathione (GSH) (67...
January 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29747151/role-of-pon1-sod2-ogg1-xrcc1-and-xrcc4-polymorphisms-on-modulation-of-dna-damage-in-workers-occupationally-exposed-to-pesticides
#10
Vivian F Silva Kahl, Fernanda Rabaioli da Silva, Jodel da Silva Alves, Gabrieli Flesch da Silva, Juliana Picinini, Varinderpal Singh Dhillon, Michael Fenech, Melissa Rosa de Souza, Johnny F Dias, Claudia Telles de Souza, Mirian Salvador, Cátia Dos Santos Branco, Flávia Valadão Thiesen, Daniel Simon, Juliana da Silva
Tobacco farming has been proving to induce poor health outcomes in agricultural workers, genomic instability being the triggering one. This study evaluated influence of PON1 (paraoxonase 1), SOD2 (superoxide dismutase), OGG1 (8-oxoguanine glycosylase), XRCC1 (X-ray repair cross-complementing protein 1), and XRCC4 (X-ray repair cross-complementing protein 4) genes polymorphisms on DNA damage in 121 subjects occupationally exposed to pesticides mixtures and nicotine at tobacco fields and 121 non-exposed individuals...
May 7, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29741961/some-indazoles-reduced-the-activity-of-human-serum-paraoxonase-1-an-antioxidant-enzyme-in-vitro-inhibition-and-molecular-modeling-studies
#11
Zuhal Alım, Deryanur Kılıç, Yeliz Demir
BACKGROUND: Paraoxonase 1 (PON1: EC 3.1.8.1) is a vital antioxidant enzyme against mainly atherosclerosis and many other diseases associated with oxidative stress. Thus, studies related to PON1 have an important place in the pharmacology. In this study, we aimed to evaluate the in vitro inhibition effects of some indazoles on the activity of human PON1. METHODS: PON1 was purified from human serum with a specific activity of 5000 U/mg and 13.50% yield by using simple chromatographic methods...
May 9, 2018: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29740582/anti-high-density-lipoprotein-antibodies-and-antioxidant-dysfunction-in-immune-driven-diseases
#12
Javier Rodríguez-Carrio, Lourdes Mozo, Patricia López, Elena Nikiphorou, Ana Suárez
Introduction: Impaired high-density lipoprotein (HDL) levels and antioxidant functionality of HDL, mainly attributed to a decreased paraoxonase-1 (PON1) functionality, have been described in autoimmune conditions. In this setting, a role for humoral response in cardiovascular disease is emerging. This study evaluates the role of immunoglobulin G (IgG) antibodies against HDL and disease-related autoantibodies on HDL dysfunction in immune-driven diseases. Methods: Serum IgG anti-HDL antibodies, PON1 activity, and total antioxidant capacity (TAC) were quantified in 381 patients with different immune-driven diseases [18 mixed connective tissue disease (MCTD), 35 primary Sjögren syndrome (pSS), 38 systemic sclerosis (SSc), 33 ANCA-associated vasculitis (AAV), 60 diabetes mellitus 1, 29 autoimmune B12 deficiency/pernicious anemia, 29 primary biliary cirrhosis, 46 IBD/Crohn, 54 IBD/UC, and 39 celiac disease (CD)] and 138 healthy controls...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29736827/generalized-anxiety-disorder-gad-and-comorbid-major-depression-with-gad-are-characterized-by-enhanced-nitro-oxidative-stress-increased-lipid-peroxidation-and-lowered-lipid-associated-antioxidant-defenses
#13
Michael Maes, Kamila Landucci Bonifacio, Nayara Rampazzo Morelli, Heber Odebrecht Vargas, Estefânia Gastaldello Moreira, Drozdstoy St Stoyanov, Décio Sabbatini Barbosa, André F Carvalho, Sandra Odebrecht Vargas Nunes
Accumulating evidence shows that nitro-oxidative pathways play an important role in the pathophysiology of major depressive disorder (MDD) and bipolar disorder (BD) and maybe anxiety disorders. The current study aims to examine superoxide dismutase (SOD1), catalase, lipid hydroperoxides (LOOH), nitric oxide metabolites (NOx), advanced oxidation protein products (AOPP), malondialdehyde (MDA), glutathione (GSH), paraoxonase 1 (PON1), high-density lipoprotein cholesterol (HDL), and uric acid (UA) in participants with and without generalized anxiety disorder (GAD) co-occurring or not with BD, MDD, or tobacco use disorder...
May 7, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29734881/effect-of-ubiquinol-supplementation-on-biochemical-and-oxidative-stress-indexes-after-intense-exercise-in-young-athletes
#14
Patrick Orlando, Sonia Silvestri, Roberta Galeazzi, Roberto Antonicelli, Fabio Marcheggiani, Ilenia Cirilli, Tiziana Bacchetti, Luca Tiano
OBJECTIVES: Physical exercise significantly impacts the biochemistry of the organism. Ubiquinone is a key component of the mitochondrial respiratory chain and ubiquinol, its reduced and active form, is an emerging molecule in sport nutrition. The aim of this study was to evaluate the effect of ubiquinol supplementation on biochemical and oxidative stress indexes after an intense bout of exercise. METHODS: 21 male young athletes (26 + 5 years of age) were randomized in two groups according to a double blind cross-over study, either supplemented with ubiquinol (200 mg/day) or placebo for 1 month...
December 2018: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/29732027/paraoxonase-activity-in-metabolic-syndrome-in-children-and-adolescents
#15
Arati Adhe-Rojekar, Mukund Ramchandra Mogarekar, Mohit Vijay Rojekar
Background: Metabolic syndrome (MetS) is a collection of various interrelated risk factors that appear to have an impact as development of atherosclerotic cardiovascular disease (CVDs). Epidemic of childhood and adolescent's obesity has increased interest in the metabolic syndrome (MS) due to the potential projection into adulthood. The prevalence of MS in adolescents has been estimated to be 6.7% in young adults and 4.2% in adolescents. We aimed to study the MetS in children and adolescents with respect to metabolic changes...
2018: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/29729306/postnatal-chlorpyrifos-exposure-and-apolipoprotein-e-apoe-genotype-differentially-affect-cholinergic-expression-and-developmental-parameters-in-transgenic-mice
#16
Pia Basaure, Laia Guardia-Escote, Maria Cabré, Fiona Peris-Sampedro, Fernando Sánchez-Santed, José L Domingo, Maria Teresa Colomina
Chlorpyrifos (CPF) is one of the most commonly used organophosphate pesticides in the world. Our previous results described that apolipoprotein E (APOE) polymorphisms are a source of individual differences in susceptibility to CPF. The aim of this study was to assess the physical and biochemical effects of postnatal exposure to CPF in the apoE targeted replacement mouse model. Mice were exposed to CPF at 0 or 1 mg/kg/day from postnatal day 10-15. Physical development, plasma and forebrain cholinesterase (ChE) activity and gene expression in liver and forebrain were evaluated...
May 2, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29723873/antibodies-against-hdl-components-in-ischaemic-stroke-and-coronary-artery-disease
#17
Joana R Batuca, Marta C Amaral, Catarina Favas, Gonçalo C Justino, Ana L Papoila, Paul R J Ames, José Delgado Alves
Quantitative and qualitative defects of high-density lipoprotein (HDL) are important in atherogenesis. In this study, we investigated whether antibodies against HDL components had additional value to conventional cardiovascular risk factors for the diagnosis of ischaemic stroke (IS) and coronary artery disease (CAD). Cross-sectional study was conducted on 53 patients with IS, 51 with CAD and 55 healthy controls, and in vitro studies to validate findings of the clinical study. We determined serum immunoglobulin G (IgG) antibodies against HDL (aHDL), apolipoproteins (aApoA-I, aApoA-II and aApoC-I) and paraoxonase-1 (aPON1) as well as PON1 activity (PON1a), total antioxidant capacity and biomarkers of endothelial activation (serum nitric oxide metabolites, 3-nitrotyrosine, VCAM-1 and ICAM-1); in vitro assays tested the capacity of IgG aHDL purified from high titer patients to inhibit PON1a and to reverse protective effect of HDL on endothelial cells...
May 3, 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29713239/oxysterols-increase-inflammation-lipid-marker-levels-and-reflect-accelerated-endothelial-dysfunction-in-experimental-animals
#18
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/29707965/an-enriched-environment-ameliorates-oxidative-stress-and-olfactory-dysfunction-in-parkinson-s-disease-with-%C3%AE-synucleinopathy
#19
Soohyun Wi, Jang Woo Lee, MinGi Kim, Chang-Hwan Park, Sung-Rae Cho
Parkinson's disease (PD) features nonmotor symptoms such as olfactory dysfunction referred to as hyposmia, an initial sign of disease progression. Metabolic dysfunction can contribute to neurodegenerative diseases, and various xenobiotics and endogenous compounds are also involved in the pathogenesis of PD. Although aerobic exercise was found to induce preservation or improvement in olfactory function in PD patients in a recent study, the exact underlying mechanism for this effect is not clear. We aimed to investigate the influence of an enriched environment (EE) on olfactory dysfunction especially via metabolic pathways related to detoxification enzymes...
January 1, 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29705451/the-barberry-juice-effects-on-metabolic-factors-and-oxidative-stress-in-patients-with-type-2-diabetes-a-randomized-clinical-trial
#20
Fatemeh Lazavi, Parvin Mirmiran, Golbon Sohrab, Omid Nikpayam, Pooneh Angoorani, Mehdi Hedayati
AIM: The aim of this study was to investigate the effect of barberry juice (BJ) on cardiovascular risk factors in patients with type 2 diabetes (T2DM). METHODS: 46 diabetic Patients were randomly allocated to either the BJ group (n = 23) who consumed 200 ml of BJ daily for eight weeks, or the control group (n = 23) with no intervention. At the baseline and the end of 8-week intervention, blood pressure and biochemical markers were measured. RESULTS: forty-two Patients completed the study...
May 2018: Complementary Therapies in Clinical Practice
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