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Paraoxonase

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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
#1
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...
August 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28808839/individuals-with-autism-have-higher-8-iso-pgf2%C3%AE-levels-than-controls-but-no-correlation-with-quantitative-assay-of-paraoxonase-1-serum-levels
#2
Bianca Pop, Alexandru-Ștefan Niculae, Tudor Lucian Pop, Andreea Liana Răchișan
Autism spectrum disorder (ASD) represents a very large set of neurodevelopmental issues with diverse clinical outcomes. Various hypotheses have been put forth for the etiology of autism spectrum disorder, including issues pertaining to oxidative stress. In this study, we conducted measurements of serum 8-Iso-Prostaglanding F2 α (8-iso-PGF2α, which is the results of non-enzimatically mediated polyunsaturated fatty acid oxidation) in a population of individuals with autism and a control group of age and sex matched controls...
August 14, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28803777/paraoxonase-2-facilitates-pancreatic-cancer-growth-and-metastasis-by-stimulating-glut1-mediated-glucose-transport
#3
Arvindhan Nagarajan, Shaillay Kumar Dogra, Lisha Sun, Neeru Gandotra, Thuy Ho, Guoping Cai, Gary Cline, Priti Kumar, Robert A Cowles, Narendra Wajapeyee
Metabolic deregulation is a hallmark of human cancers, and the glycolytic and glutamine metabolism pathways were shown to be deregulated in pancreatic ductal adenocarcinoma (PDAC). To identify new metabolic regulators of PDAC tumor growth and metastasis, we systematically knocked down metabolic genes that were overexpressed in human PDAC tumor samples using short hairpin RNAs. We found that p53 transcriptionally represses paraoxonase 2 (PON2), which regulates GLUT1-mediated glucose transport via stomatin. The loss of PON2 initiates the cellular starvation response and activates AMP-activated protein kinase (AMPK)...
August 17, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28781774/level-of-dietary-energy-and-2-4-thiazolidinedione-alter-molecular-and-systemic-biomarkers-of-inflammation-and-liver-function-in-holstein-cows
#4
Afshin Hosseini, Mustafa Salman, Zheng Zhou, James K Drackley, Erminio Trevisi, Juan J Loor
BACKGROUND: The objective of the study was to evaluate the effect of overfeeding a moderate energy diet and a 2,4-thiazolidinedione (TZD) injection on blood and hepatic tissue biomarkers of lipid metabolism, oxidative stress, and inflammation as it relates to insulin sensitivity. RESULTS: Fourteen dry non-pregnant cows were fed a control (CON) diet to meet 100% of NRC requirements for 3 wk, after which half of the cows were assigned to a moderate-energy diet (OVE) and half of the cows continued on CON for 6 wk...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28779954/paraoxonase-1-pon1-and-stroke-the-dilemma-of-the-genetic-variation
#5
REVIEW
Amir Tajbakhsh, Mehdi Rezaee, Mahdi Rivandi, Faranak Forouzanfar, Fahimeh Afzaljavan, Alireza Pasdar
Ischaemic stroke, which is mostly caused by atherosclerosis, is one of the most widely causes of mortality and morbidity. One of the most important enzymatic activities of paraoxonase-1 (PON1) in association with high-density lipoprotein (HDL) is the prevention of low-density lipoprotein (LDL) oxidation, which gives it an anti-atherogenic activity. PON1 expression and activity is influenced by various factors; the most important of which is genetic polymorphism, mainly single nucleotide polymorphisms (SNPs)...
August 2, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28774887/suppressed-hepatic-bile-acid-signalling-despite-elevated-production-of-primary-and-secondary-bile-acids-in-nafld
#6
Na Jiao, Susan S Baker, Adrian Chapa-Rodriguez, Wensheng Liu, Colleen A Nugent, Maria Tsompana, Lucy Mastrandrea, Michael J Buck, Robert D Baker, Robert J Genco, Ruixin Zhu, Lixin Zhu
OBJECTIVE: Bile acids are regulators of lipid and glucose metabolism, and modulate inflammation in the liver and other tissues. Primary bile acids such as cholic acid and chenodeoxycholic acid (CDCA) are produced in the liver, and converted into secondary bile acids such as deoxycholic acid (DCA) and lithocholic acid by gut microbiota. Here we investigated the possible roles of bile acids in non-alcoholic fatty liver disease (NAFLD) pathogenesis and the impact of the gut microbiome on bile acid signalling in NAFLD...
August 3, 2017: Gut
https://www.readbyqxmd.com/read/28768768/regulation-of-the-epithelial-na-channel-by-paraoxonase-2
#7
Shujie Shi, Teresa M Buck, Carol L Kinlough, Allison L Marciszyn, Rebecca P Hughey, Martin Chalfie, Jeffrey L Brodsky, Thomas R Kleyman
Paraoxonase-2 (PON-2) is a membrane-bound lactonase with unique anti-oxidative and anti-atherosclerotic properties. PON-2 shares key structural elements with MEC-6, an endoplasmic reticulum resident molecular chaperone in Caenorhabditis elegans MEC-6 modulates the expression of a mechano-transductive ion channel comprised of MEC-4 and MEC-10 in touch receptor neurons. Because pon-2 mRNA resides in multiple rat nephron segments, including aldosterone-sensitive distal nephron where the epithelial Na(+) channel (ENaC) is expressed, we hypothesized that PON-2 would similarly regulate ENaC expression...
August 2, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28766352/effect-of-different-doses-of-pregabalin-on-skeletal-muscle-ischaemia-reperfusion-injury-in-rats
#8
L Ozturk, H T Dogan, A Kilicarslan, M E Aydin, A Ozer, H Demirtas, Y Kilic, E Iriz, A Kucuk, A C Bayraktar, M Kavutcu, M Arslan
AIM/INTRODUCTION: Analgesic, anti-inflammatory and anti-apoptotic effects of pregabalin have been shown previously. In this study, we investigated the protective effect of different doses of pregabalin on skeletal muscle IR injury in rats. MATERIALS AND METHODS: 24 rats were randomly divided into 4 groups (Control, Ischaemia-Reperfusion (IR), IR-Pregabalin 50 mg, IR-Pregabalin 200 mg). Following IR, serum Ischemia Modified Albumin (IMA) and tissue Paraoxonase (PON) were studied and gastrocnemius muscle tissue was removed for histopathologic examination...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28760411/polymorphisms-of-mthfr-enos-ace-agt-apoe-pon1-pde4d-and-ischemic-stroke-meta-analysis
#9
Loo Keat Wei, Anthony Au, Saras Menon, Lyn R Griffiths, Cheah Wee Kooi, Looi Irene, Jiangyang Zhao, Chaeyoung Lee, Avdonina Maria Alekseevna, Muhammad Radzi Abdul Hassan, Zariah Abdul Aziz
INTRODUCTION: The association between ischemic stroke and genetic polymorphisms of methylenetetrahydrofolate reductase (MTHFR; 677C>T and 1298A>C), endothelial nitric oxide synthase (eNOS; -786T>C, +894G>T, and variable number tandem repeat [VNTR]), phosphodiesterase 4D (PDE4D; SNPs 83 and 87), angiotensin-converting enzyme (ACE) I/D, angiotensinogen (AGT) 235M>T, paraoxonase 1 (PON1) 192Q>R, and apolipoprotein E (ApoE) ε2ε3ε4 remains inconclusive. Therefore, this updated meta-analysis aimed to clarify the presumed influence of genetic polymorphisms on ischemic stroke by meta-analyzing the comprehensive coverage of all individual association studies...
July 28, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28759172/assessment-of-oxidative-stress-markers-in-cord-blood-of-newborns-to-patients-with-oxytocin-induced-labor
#10
Talip Karaçor, Sibel Sak, Serdar Başaranoğlu, Nurullah Peker, Elif Ağaçayak, Muhammet Erdal Sak, Abdulkadir Turgut, Mehmet Sıddık Evsen, Osman Evliyaoğlu, Talip Gül
AIM: We aimed to measure the extent of oxidative stress experienced during labor by the neonates of pregnant women undergoing induced or spontaneous birth and to compare the effects of induced labor on fetal well-being. METHODS: Sixty-four healthy pregnant women referring to the Department of Gynecology and Obstetrics, Dicle University Medical Faculty between October 2010 and May 2011 were included in this comparative study. Pregnant women undergoing induced labor by oxytocin were group 1 and those without labor induction were group 2...
May 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28758412/onset-of-depressed-heart-work-is-correlated-with-the-increased-heart-rate-and-shorten-qt-interval-in-high-carbohydrate-fed-overweight-rats
#11
Aysegul Toy Durak, Yusuf Olgar, Erkan Tuncay, Irem Karaomerlioglu, Gizem Kayki Mutlu, Ebru Arioglu Inan, Vecdi Melih Altan, Belma Turan
Mechanical activity of the heart is adversely affected with metabolic syndrome (MetS) characterized with increased body-mass and marked insulin-resistance. Herein, we examined effects of high-carbohydrate intake on cardiac functional abnormalities via evaluating in situ heart-work, heart-rate and electrocardiograms (ECG) in rats. MetS is induced in Wistar male rats by adding 32% sucrose for 22-24 weeks and confirmed with insulin-resistance, increased body-weight, blood glucose and insulin, systolic and diastolic blood pressures besides significant left ventricular integrity-lost and increased connective-tissue around myofibrils...
July 30, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28757113/cardiovascular-risk-and-the-effect-of-nitric-oxide-synthase-inhibition-in-female-rats-the-role-of-estrogen
#12
Jaqueline C Castardo-de-Paula, Blenda H de Campos, Eric D T Amorim, Rosiane V da Silva, Carine C de Farias, Luciana Higachi, Phileno Pinge-Filho, Décio S Barbosa, Marli C Martins-Pinge
It is known that autonomic modulation is responsive to ovarian hormone levels and that estrogen increases nitric oxide (NO) bioavailability. However, little is known about the interaction of nitric oxide synthase (NOS) isoforms with autonomic modulation, oxidative stress and cardiovascular risk in females. This study aimed to investigate cardiovascular, autonomic and oxidative parameters after selective NOS inhibition. A spectral analysis of systolic arterial pressure (SAP) and heart rate variability (HRV) was performed...
July 28, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28751001/effect-of-tofacitinib-on-lipid-levels-and-lipid-related-parameters-in-patients-with-moderate-to-severe-psoriasis
#13
Robert Wolk, Ehrin J Armstrong, Peter R Hansen, Bruce Thiers, Shuping Lan, Anna M Tallman, Mandeep Kaur, Svitlana Tatulych
BACKGROUND: Psoriasis is a systemic inflammatory disease associated with increased cardiovascular (CV) risk and altered lipid metabolism. Tofacitinib is an oral Janus kinase inhibitor. OBJECTIVE: The aim of the study was to investigate the effects of tofacitinib on traditional and nontraditional lipid parameters and CV risk markers in patients with psoriasis from a phase III study, OPT Pivotal 1. METHODS: Patients with psoriasis were randomized to tofacitinib 5 or 10 mg twice daily (BID) or placebo BID...
June 24, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28746818/the-role-of-paraoxonase-1-in-regulating-hdl-functionality-during-aging
#14
Abdelouahed Khalil, Olivier Kamtchueng Simo, Souade Ikhlef, Hicham Berrougui
Pharmacological interventions to increase HDL concentrations have led to disappointing results and have contributed to the emergence of the concept of HDL functionality. The anti-atherogenic activity of HDL can be explained by their functionality or quality. The capacity of HDL to maintain cellular cholesterol homeostasis and to transport cholesterol from peripheral cells to the liver for elimination is one of their principal anti-atherogenic activities. However, HDL possess several other attributes that contribute to their protective effect against cardiovascular diseases...
July 26, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28742600/cholesterol-reduction-and-macrophage-function-role-of-paraoxonases
#15
C Roger White, G M Anantharamaiah
PURPOSE OF REVIEW: Unregulated uptake of oxidized LDL by macrophages to form foam cells is the hallmark for atherosclerosis. The paraoxonase (PON) family of enzymes plays a critical role in attenuating atherosclerotic lesion formation by hydrolyzing lipid peroxides (LOOHs) and preventing the oxidation of LDL particles and by enhancing HDL-mediated cholesterol efflux. Findings in recent years suggest novel mechanisms by which PON isoforms interact with macrophages to regulate cholesterol metabolism and cellular function...
July 22, 2017: Current Opinion in Lipidology
https://www.readbyqxmd.com/read/28732570/incident-type-2-diabetes-is-associated-with-hdl-but-not-with-its-anti-oxidant-constituent-paraoxonase-1-the-prospective-cohort-prevend-study
#16
Setor K Kunutsor, Lyanne M Kieneker, Stephan J L Bakker, Richard W James, Robin P F Dullaart
OBJECTIVE: High-density lipoprotein cholesterol (HDL-C) is an established risk marker for cardiovascular disease and consistently associated with type 2 diabetes risk. Serum paraoxonase-1 (PON-1) - an anti-oxidant constituent of HDL - is inversely associated with cardiovascular disease risk, but its relationship with incident type 2 diabetes is uncertain. We aimed to investigate the prospective association between PON-1 and type 2 diabetes risk. METHODS: PON-1 was measured as its arylesterase activity at baseline in the Prevention of Renal and Vascular End-stage Disease (PREVEND) prospective study of 5947 predominantly Caucasian participants aged 28-75years with no pre-existing diabetes, that recorded 500 type 2 diabetes cases during a median follow-up of 11...
August 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28723944/application-of-mass-spectrometry-to-elucidate-the-pathophysiology-of-encephalitozoon-cuniculi-infection-in-rabbits
#17
Guillaume Desoubeaux, Maria Del Carmen Piqueras, Ana Pantin, Sanjoy K Bhattacharya, Roman Peschke, Anja Joachim, Carolyn Cray
Encephalitozoon cuniculi is a microsporidian species which can induce subclinical to serious disease in mammals including rabbits, a definitive natural host. The pathophysiology of infection has not been comprehensively elucidated. In this exploratory study, we utilized two mass spectrometry approaches: first, the analysis of the humoral response by profiling the microsporidian antigens as revealed by Western blot screening, and second, implementing the iTRAQ®-labeling protocol to focus on the changes within the host proteome during infection...
2017: PloS One
https://www.readbyqxmd.com/read/28721150/phenotype-distribution-of-the-paraoxonase-gene-in-patients-with-cardiac-disease
#18
Hamit Yasar Ellidag, Ozgur Aydin, Esin Eren, Necat Yilmaz, Tugra Gencpinar, Selcuk Kucukseymen, Akar Yilmaz, Fatma Demet Arslan Ince
INTRODUCTION: Paraoxonase (PON1) is an enigmatic enzyme with multiple enzymatic properties including arylesterase and lactonase activities besides its ability to hydrolyze the toxic metabolite of parathion, paraoxon. The aim of this study was to determine the phenotype distribution of PON1 in patients with cardiac disease who were classified in coronary artery bypass grafting (CABG), heart valve disease (HVD), heart failure (HF) and ST elevation myocardial infarction (STEMI) groups and healthy subjects as a control group...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28719808/activated-neuro-oxidative-and-neuro-nitrosative-pathways-at-the-end-of-term-are-associated-with-inflammation-and-physio-somatic-and-depression-symptoms-while-predicting-outcome-characteristics-in-mother-and-baby
#19
Chutima Roomruangwong, Decio Sabbatini Barbosa, Andressa Keiko Matsumoto, André de Souza Nogueira, Buranee Kanchanatawan, Sunee Sirivichayakul, André F Carvalho, Sebastien Duleu, Michel Geffard, Estefania Gastaldello Moreira, Michael Maes
OBJECTIVES: To examine oxidative & nitrosative stress (O&NS) biomarkers at the end of term in relation to perinatal affective symptoms, neuro-immune biomarkers and pregnancy-related outcome variables. METHODS: We measured plasma advanced oxidation protein products (AOPP), nitric oxide metabolites (NOx), total radical trapping antioxidant parameter (TRAP), -sulfhydryl (-SH), peroxides (LOOH) and paraoxonase (PON)1 activity in pregnant women with and without prenatal depression and non-pregnant controls...
July 6, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28717537/paraoxonase-and-arylesterase-activity-in-bladder-cancer
#20
Mehmet Mazhar Utanğaç, Ercan Yeni, Murat Savaş, Adem Altunkol, Halil Çiftçi, Kemal Gümüş, Mehmet Demir
OBJECTIVE: Oxidative stress is the main pathogenetic mechanism in bladder cancer among many other causes. We aimed to investigate whether a potential relationship exists between bladder cancer and the activities of paraoxonase (PON1) and arylesterase (ARE) enzymes. MATERIAL AND METHODS: The study included 56 patients with bladder cancer, and 57 healthy individuals. The relationships between enzyme activity and tumour grade, stage, muscular invasion and tumour size were evaluated...
June 2017: Turkish Journal of Urology
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