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paraoxonase 1

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https://www.readbyqxmd.com/read/29146227/bariatric-surgery-improves-lipoprotein-profile-in-morbidly-obese-patients-by-reducing-ldl-cholesterol-apob-and-saa-pon1-ratio-increasing-hdl-cholesterol-but-has-no-effect-on-cholesterol-efflux-capacity
#1
Christian Abendstein Kjellmo, Helen Karlsson, Torunn K Nestvold, Stefan Ljunggren, Karin Cederbrant, Maritha Marcusson-Ståhl, Monica Mathisen, Knut Tore Lappegård, Anders Hovland
BACKGROUND: Bariatric surgery has been shown to reduce cardiovascular events and cause-specific mortality for coronary artery disease in obese patients. Lipoprotein biomarkers relating to low-density lipoprotein (LDL), high-density lipoprotein (HDL), their subfractions, and macrophage cholesterol efflux have all been hypothesized to be of value in cardiovascular risk assessment. OBJECTIVES: The objective of this study was to examine the effect of a lifestyle intervention followed by bariatric surgery on the lipid profile of morbidly obese patients...
November 8, 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/29143963/expression-of-paraoxonase-types-1-2-and-3-in-reproductive-tissues-and-activity-of-paraoxonase-type-1-in-the-serum-and-seminal-plasma-of-bulls
#2
C E R Ferreira, C S Haas, K L Goularte, M T Rovani, F F Cardoso, A Schneider, B G Gasperin, T Lucia
The paraoxonases types 1, 2 and 3 (PON1, PON2 and PON3, respectively) are enzymes that degrade lipid peroxides, preventing oxidative damages relevant for male reproductive function. This study determined the expression of those three paraoxonases in reproductive tissues of bulls and evaluated correlations among the activity of PON1 in the serum and seminal plasma with breeding soundness parameters in bulls. The expression of PON1, PON2 and PON3 was characterised by RT-PCR in samples of testicular parenchyma, vesicular glands and epididymis collected from three slaughtered bulls...
November 16, 2017: Andrologia
https://www.readbyqxmd.com/read/29143686/acute-phase-proteins-and-markers-of-oxidative-stress-to-assess-the-severity-of-the-pulmonary-hypertension-in-heartworm-infected-dogs
#3
Elena Carretón, José Joaquín Cerón, Silvia Martínez-Subiela, Asta Tvarijonaviciute, Alicia Caro-Vadillo, José Alberto Montoya-Alonso
BACKGROUND: Canine heartworm infection is characterized by pulmonary endarteritis and pulmonary hypertension (PH). The aim of the present study was to evaluate the relationship between PH with the concentrations of different positive (C-reactive protein [CRP] and haptoglobin [Hp]) and negative (albumin and paraoxonase-1 [PON-1]) acute phase proteins (APP), as well as the oxidative stress, by measuring glutathione peroxidase (GPx) and total antioxidant capacity (TAC) in 27 heartworm-infected dogs on Day 0 (diagnosis) and Day 120 (1 month after the last adulticide injection)...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29143350/dna-variants-and-organophosphate-neurotoxicity-among-emerging-farmers-in-the-western-cape-of-south-africa
#4
Tracy Glass, Mohamed A Dalvie, Zelda Holtman, Anna A Vorster, Rajkumar S Ramesar, Leslie London
BACKGROUND: Previous epidemiological studies investigating modification of organophosphate (OP) neurotoxicity by xenobiotic metabolizing enzymes (XMEs) polymorphisms have produced inconsistent results. METHODS: A cross-sectional study of 301 emerging farmers was conducted. Neurotoxicity testing included forward and backward recall, digit span, and vibration sensitivity testing. Questionnaire data included demography, potential confounders, and work history of pesticide exposures...
November 16, 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/29141157/the-devastating-effect-of-exposure-to-high-irradiation-dose-on-liver-and-the-performance-of-synthesized-nano-hap-in-relieve-the-associated-symptoms-in-rats
#5
Eman Ismail Gheriany, Sameh A Awwad
Ionizing radiation is one of the environmental factors that may contribute to liver dysfunction by a mechanism involving oxidative stress. The present investigation was undertaken to study the possible therapeutic effect of nano-HAp on whole body gamma irradiation induced hepatotoxicity in rats. The study consisted of three groups of 10 rats each. Group 1 (control), whereas group 2 received a single dose of γ-radiation (10Gy). The animals in groups 3 was treated with nano-HAp (100 mg/kg b.w.) once / week for three weeks starting in the next day of γ radiation...
November 15, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29129008/high-levels-of-oxidized-fatty-acids-in-hdl-are-associated-with-impaired-hdl-function-in-patients-with-active-rheumatoid-arthritis
#6
Christina Charles-Schoeman, David Meriwether, Yuen Yin Lee, Ani Shahbazian, Srinivasa T Reddy
The objective of this study was to evaluate oxidation products of arachidonic acid and linoleic acid in lipoproteins and synovial fluid (SF) from patients with active rheumatoid arthritis (RA) compared to non-RA controls. High-density lipoproteins (HDL) and low-density lipoproteins (LDL) were isolated from plasma using fast protein liquid chromatography and HDL was isolated from SF using dextran sulfate precipitation. 5-Hydroxyeicosatetraenoic acid (HETE), 12-HETE, 15-HETE, 9 hydroxyoctadecadienoic (HODE), and 13-HODE levels were measured in HDL, LDL, and SF by liquid chromatography-tandem mass spectrometry...
November 11, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/29128698/seminal-plasma-antioxidants-are-directly-involved-in-boar-sperm-cryotolerance
#7
Junwei Li, Isabel Barranco, Asta Tvarijonaviciute, Manuel F Molina, Emilio A Martinez, Heriberto Rodriguez-Martinez, Inmaculada Parrilla, Jordi Roca
Boar ejaculates are ejected in fractions with a specific composition in terms of sperm numbers and seminal plasma (SP), which is reflected in the varying sperm cryotolerance observed among different fractions. As boar sperm are particularly sensitive to oxidative stress, this study evaluated the role of SP antioxidants in the observed differences in sperm cryotolerance among ejaculate fractions. Ten ejaculates from five boars were manually collected in fractions: the first 10 mL of the sperm-rich fraction (SRF), the rest of the SRF and the post-SRF...
October 31, 2017: Theriogenology
https://www.readbyqxmd.com/read/29121934/effect-of-rosuvastatin-on-fasting-and-postprandial-endothelial-biomarker-levels-and-microvascular-reactivity-in-patients-with-type-2-diabetes-and-dyslipidemia-a-preliminary-report
#8
Kyoung Min Kim, Kyong Yeun Jung, Han Mi Yun, Seo Young Lee, Tae Jung Oh, Hak Chul Jang, Soo Lim
BACKGROUND: The cardiovascular benefits of statins have been proven, but their effect on circulation in small vessels has not been examined fully. We investigated the effect of 20 mg rosuvastatin on biomarkers, including paraoxonase-1 (PON-1) and asymmetric dimethylarginine (ADMA), and on microvascular reactivity. METHOD: We enrolled 20 dyslipidemic patients with type 2 diabetes and 20 age- and body mass index (BMI)-matched healthy controls. Rosuvastatin (20 mg/day) was given to the patient group for 12 weeks...
November 9, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29118945/the-role-of-cholesterol-enriched-diet-and-paraoxonase-1-inhibition-in-atherosclerosis-progression
#9
Masoumeh Amani, Akbar Darbin, Masoud Pezeshkian, Abbas Afrasiabi, Naser Safaie, Ahmadreza Jodati, Masoud Darabi, Maghsod Shaaker, Zeinab Latifi, Amir Fattahi, Gholam-Hossein Farjah, Mohammad Nouri, Mohammad Hassan Khadem-Ansari
Introduction: Atherosclerosis could be deemed as a chronic, progressive, and inflammatory disease. It has been well-documented that high-density lipoprotein (HDL) can reduce the risk of the atherosclerosis occurrence through exerting some anti-atherogenic mechanisms. In recent years, the strong evidence has suggested that paraoxonase 1 (PON1) may contribute to antioxidant properties of HDL. In the present study, the impact of a diet enriched with cholesterol and also the PON1 inhibition on atheroma formation and lipid profile has been investigated...
2017: Journal of Cardiovascular and Thoracic Research
https://www.readbyqxmd.com/read/29118461/relationship-between-rs854560-pon1-gene-polymorphism-and-tobacco-smoking-with-coronary-artery-disease
#10
Joanna Iwanicka, Tomasz Iwanicki, Paweł Niemiec, Tomasz Nowak, Jolanta Krauze, Władysław Grzeszczak, Sylwia Górczyńska-Kosiorz, Anna Ochalska-Tyka, Iwona Żak
Paraoxonase-1 (PON1) is the antioxidant marker of high-density lipoproteins protecting against atherosclerosis and coronary artery disease (CAD) phenotype. The purpose of the present study was to determine whether the PON1 gene rs854560 polymorphism (163T>A) is associated with CAD in Polish population. rs854560 was genotyped in 494 subjects: 248 patients with premature CAD and 246 blood donors as a control. We found that the risk of CAD was significantly higher in TT homozygotes than in A allele carriers (OR = 1...
2017: Disease Markers
https://www.readbyqxmd.com/read/29113434/similar-active-sites-and-mechanisms-do-not-lead-to-cross-promiscuity-in-organophosphate-hydrolysis-implications-for-biotherapeutic-engineering
#11
Miha Purg, Mikael Elias, Shina Caroline Lynn Kamerlin
Organophosphate hydrolases are proficient catalysts of the breakdown of neurotoxic organophosphates, and have great potential as both biotherapeutics for treating acute organophosphate toxicity, and as bioremediation agents. Yet proficient organophosphatases such as serum paraoxonase 1 (PON1) and the organophosphate-hydrolyzing lactonase SsoPox are unable to hydrolyze organophosphates with challenging leaving groups such as diisopropyl fluorophosphate (DFP) or venomous agent X (VX), creating a major challenge for enzyme design...
November 7, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29103714/ethyl-cellulose-rumen-protected-methionine-alleviates-inflammation-and-oxidative-stress-and-improves-neutrophil-function-during-the-periparturient-period-and-early-lactation-in-holstein-dairy-cows
#12
F Batistel, J M Arroyo, C I M Garces, E Trevisi, C Parys, M A Ballou, F C Cardoso, J J Loor
The periparturient period is the most critical phase in the productive cycle of dairy cows and is characterized by impairment of the immune system. Our objective was to evaluate the effect of feeding ethyl-cellulose rumen-protected methionine (RPM) starting at d -28 from expected parturition through 60 d in milk on biomarkers of inflammation, oxidative stress, and liver function as well as leukocyte function. Sixty multiparous Holstein cows were used in a block design and assigned to either a control or the control plus ethyl-cellulose RPM (Mepron, Evonik Nutrition & Care GmbH)...
November 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29090223/paraoxonase-1-activity-lipid-profile-and-atherogenic-indexes-status-in-coronary-heart-disease
#13
Mostafa Cheraghi, Gholamreza Shahsavari, Ali Maleki, Hassan Ahmadvand
BACKGROUND: Dyslipidemia is considered an independent risk factor for coronary heart disease (CHD). In the present study, we examined lipid profiles and paraoxonase 1 (PON1) activity and atherogenic indexes status and the relationship of PON1 activity by high-density lipoprotein (HDL) and atherogenic indexes in CHD patients and healthy people. METHODS: The aim of the study was to compare PON1, lipid profiles, and atherogenic indexes in CHD patients and healthy people as controls...
October 2017: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29063603/effects-of-paraoxonase-1-on-the-cytodifferentiation-and-mineralization-of-periodontal-ligament-cells
#14
R Masumoto, J Kitagaki, M Matsumoto, S Miyauchi, C Fujihara, M Yamashita, S Yamada, M Kitamura, S Murakami
BACKGROUND AND OBJECTIVE: Single nucleotide polymorphisms (SNPs) of paraoxonase 1 (PON1) are known to be associated with the pathogenesis of osteoporosis and periodontitis. However, the effects of PON1 on the osteoblastic differentiation of periodontal ligament (PDL) cells are unclear. In this study, we examined the effects of PON1 on the osteoblastic differentiation of PDL cells, and analysed the role of PON1 SNPs on the pathogenesis of aggressive periodontitis (AgP) in the Japanese population...
October 24, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29050675/comparison-of-serum-acetyl-hydrolase-paf-ah-and-paraoxonase-1-pon1-values-between-prostate-cancer-patients-and-a-control-group
#15
Erdal Benli, Ahmet Bayrak, Abdullah Cirakoglu, Tulin Bayrak, Tevfik Noyan
The aim of the study was to measure platelet-activating factor acetyl hydrolase (PAF-AH) and paraoxonase (PON1) enzyme activity levels in patients with high Psa values to compare with healthy peers and also to determine the efficacy of these parameters in predicting pathologic results of patients with high Psa values. This study included 66 patients with Psa value > 4 ng/dl (Group 1) and 44 patients with Psa <4 ng/dl (Group 2) for a total of 110 patients. Parameters measured in serum of PON1, PAF-AH, and MDA were compared between the groups...
November 2017: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/29049204/the-genetic-association-between-pon1-polymorphisms-and-osteonecrosis-of-femoral-head-a-case-control-study
#16
Jian-Mei Li, Yi Li, Lu Wang
The purpose of this study was to investigate the relationship between Paraoxonase-1 (PON1) gene rs662, rs854555 polymorphisms and osteonecrosis of the femoral head (ONFH) in Han population, northern China.Polymerase chain reaction-restriction fragment length polymorphism was used to determine genotypes of PON1 polymorphisms in 84 patients with ONFH and 96 healthy persons. χ test was used to compare distribution differences of genotype, allele, and haplotype between the case and control groups. The odds ratio (OR) and 95% confidence interval (CI) were calculated to reveal the effects of PON1 polymorphisms on risk of ONFH, and the results were adjusted using logistic regression analysis...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29049176/correlation-of-pon1-polymorphisms-with-ankylosing-spondylitis-susceptibility-a-case-control-study-in-chinese-han-population
#17
Haitao Xu, Yiming Qu
Paraoxonase 1 (PON1) modulates the oxidative stress and inflammatory response, thus, it might relate to the risk of ankylosing spondylitis (AS). The aim of present study was to discover the correlation of PON1 polymorphisms (rs662 and rs854560) with PON1 activity and AS risk.Around 128 AS patients and 146 healthy controls were recruited in this case-control study. PON1 polymorphisms were genotyped by direct sequencing. Serum PON1 activity was detected and compared by nonparametric test in different genotypes of PON1 polymorphisms...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29049133/hdl-cholesterol-efflux-is-impaired-in-older-patients-with-early-sepsis-a-subanalysis-of-a-prospective-pilot-study
#18
Faheem W Guirgis, Christiaan Leeuwenburgh, Victor Grijalva, Jennifer Bowman, Colleen Kalynych, Lyle Moldawer, Frederick A Moore, Srinivasa T Reddy
BACKGROUND: Proper functioning of high density lipoprotein (HDL) is necessary for protection against sepsis. However, previous work has demonstrated that HDL becomes oxidized and dysfunctional (Dys-HDL) during sepsis. Older (age > 65 years) patients are at particularly high risk of sepsis and poor outcomes from sepsis. STUDY OBJECTIVE: To compare functional properties of HDL (cholesterol efflux capacity and paraoxonase enzyme 1 (PON-1) activity) and Dys-HDL between older (age > 65 years) sepsis patients and older healthy volunteers...
October 18, 2017: Shock
https://www.readbyqxmd.com/read/29044294/serum-levels-of-anti-pon1-and-anti-hdl-antibodies-as-potential-biomarkers-of-premature-atherosclerosis-in-systemic-lupus-erythematosus
#19
Patricia López, Javier Rodríguez-Carrio, Aleida Martínez-Zapico, Ángel I Pérez-Álvarez, Raquel López-Mejías, Lorena Benavente, Lourdes Mozo Mozo, Luis Caminal-Montero, Miguel A González-Gay, Ana Suárez
The present study aimed to evaluate the possible role of immunoglobulin G (IgG) antibodies against high-density lipoproteins (HDL) and paraoxonase 1 (PON1) as possible biomarkers of cardiovascular disease (CVD) in systemic lupus erythematosus (SLE). To this end, levels of these autoantibodies, PON1 activity and total antioxidant capacity were quantified in serum samples from 198 SLE patients, 100 healthy controls (HC) and 42 non-autoimmune individuals with traditional cardiovascular risk factors. PON1 rs662 polymorphism was analysed in a subgroup of patients and controls...
October 10, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29035403/-polymorphism-of-genes-encoding-proteins-of-dna-repair-vs-occupational-and-environmental-exposure-to-lead-arsenic-and-pesticides
#20
REVIEW
Karol Bukowski, Katarzyna Woźniak
Genetic polymorphism is associated with the occurrence of at least 2 different alleles in the locus with a frequency higher than 1% in the population. Among polymorphisms we can find single nucleotide polymorphism (SNP) and polymorphism of variable number of tandem repeats. The presence of certain polymorphisms in genes encoding DNA repair enzymes is associated with the speed and efficiency of DNA repair and can protect or expose humans to the effects provoked by xenobiotics. Chemicals, such as lead, arsenic pesticides are considered to exhibit strong toxicity...
October 12, 2017: Medycyna Pracy
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