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paraoxonase 1

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https://www.readbyqxmd.com/read/28226299/colorimetric-and-electrophoretic-evaluation-of-lipoprotein-fractions-in-healthy-neonatal-calves-comparison-with-results-from-adult-cows-and-from-calves-with-inflammatory-conditions
#1
Alessia Giordano, Gabriele Rossi, Monica Probo, Pierangelo Moretti, Saverio Paltrinieri
High density lipoproteins (HDLs) are pivotal in innate immunity and decrease in serum during inflammation. Several studies have been done about lipoprotein changes in transition cows but little is known about their changes in newborn calves. The aim of this study is to provide information about HDLs in newborn calves, by defining the possible age-related changes in healthy calves compared with adults and by assessing the possible differences in calves with inflammation. Lipoprotein electrophoretic separation (reported as percentages) and colorimetric measurement of HDL (HDL-C) were performed on healthy cows and calves in order to identify possible differences in the lipoprotein profile due to the age...
February 13, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28223025/transcriptional-regulation-of-human-paraoxonase-1-by-nuclear-receptors
#2
REVIEW
N Ponce-Ruiz, F E Murillo-González, A E Rojas-García, Mike Mackness, Y Y Bernal-Hernández, B S Barrón-Vivanco, C A González-Arias, I M Medina-Díaz
Paraoxonase 1 (PON1) is a calcium-dependent esterase synthesized primarily in the liver and secreted into the plasma, where it is associates with high density lipoproteins (HDL). PON1 acts as antioxidant preventing low-density lipoprotein (LDL) oxidation which is believed to be critical in the initiation and progression of atherosclerosis. Additionally, PON1 hydrolyzes and detoxifies some toxic metabolites of organophosphorus compounds (OPs). Thus, PON1 activity and expression levels are important for determining susceptibility to OPs intoxication and risk of diseases related to inflammation and oxidative stress...
February 18, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28212288/the-search-for-dietary-supplements-to-elevate-or-activate-circulating-paraoxonases
#3
REVIEW
José M Lou-Bonafonte, Clara Gabás-Rivera, María A Navarro, Jesús Osada
Low levels of paraoxonase 1 (PON1) have been associated with the development of several pathological conditions, whereas high levels have been shown to be anti-atherosclerotic in mouse models. These findings suggest that PON1 could be a good surrogate biomarker. The other members of the family, namely PON2 and PON3, the role of which has been much less studied, deserve more attention. This paper provides a systematic review of current evidence concerning dietary supplements in that regard. Preliminary studies indicate that the response to dietary supplements may have a nutrigenetic aspect that will need to be considered in large population studies or in clinical trials...
February 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28202378/neonatology-oxidative-status-in-preterm-infants-with-premature-preterm-rupture-of-membranes-and-fetal-inflammatuar-response-syndrome
#4
Elif Özalkaya, Güner Karatekin, Sevilay Topçuoğlu, Hande Özgün Karatepe, Taner Hafızoğlu, Pervin Baran, Fahri Ovalı
BACKGROUND: The aim of this study, to determine an index of oxidative stress index in preterm infants less than 34 weeks gestational age with premature preterm rupture of membrane (PPROM) and fetal inflammatory response syndrome (FIRS). METHODS: This study was designed as a prospective study. Fifty-one premature infants less than 35 weeks of gestational age were included in the study. The umbilical cord blood concentrations of IL-6, TAC (total antioxidant capacity) and PON-1 (paraoxonase-1) levels and TOS (total oxidative stress) were studied...
January 17, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28196109/associations-between-pon1-enzyme-activities-in-human-ovarian-follicular-fluid-and-serum-specimens
#5
Keewan Kim, Michael S Bloom, Victor Y Fujimoto, Richard W Browne
The importance of high-density lipoprotein (HDL) particle components to reproduction is increasingly recognized, including the constituent paraoxonase 1 (PON1). However, the reliability characteristics of PON1 enzymes in ovarian follicular fluid (FF) as biomarkers for clinical and epidemiologic studies have not been described. Therefore, we characterized PON1 enzymes in FF and serum and assessed the impact of the PON1 Q192R polymorphism on associations between enzyme activities in two compartments. We also evaluated associations between HDL particle size and enzyme activities...
2017: PloS One
https://www.readbyqxmd.com/read/28193797/mediterranean-diet-improves-high-density-lipoprotein-function-in-high-cardiovascular-risk-individuals-a-randomized-controlled-trial
#6
Álvaro Hernáez, Olga Castañer, Roberto Elosua, Xavier Pintó, Ramón Estruch, Jordi Salas-Salvadó, Dolores Corella, Fernando Arós, Lluis Serra-Majem, Miquel Fiol, Manuel Ortega-Calvo, Emilio Ros, Miguel Ángel Martínez-González, Rafael de la Torre, M Carmen López-Sabater, Montserrat Fitó
BACKGROUND: The biological functions of high-density lipoproteins (HDLs) contribute to explaining the cardioprotective role of the lipoprotein beyond quantitative HDL cholesterol levels. A few small-scale interventions with a single antioxidant have improved some HDL functions. However, to date, no long-term, large-scale, randomized controlled trial has been conducted to assess the effects of an antioxidant-rich dietary pattern (such as a traditional Mediterranean diet [TMD]) on HDL function in humans...
February 14, 2017: Circulation
https://www.readbyqxmd.com/read/28185016/association-between-paraoxonase-1-gene-q192r-and-l55m-polymorphisms-in-systemic-lupus-erythematosus-sle-and-anti-phospholipid-syndrome-aps-in-a-population-from-cairo-of-egypt
#7
Alshaymaa Ahmed Ibrahim, Dalia El-Lebedy, Ingy Ashmawy, Maha Abdel Hady
Paraoxonase-1 (PON1) is involved in the oxidative stress process that cause tissue damage observed in systemic lupus erythematosus (SLE) and anti-phospholipid syndrome (APS). The aim of the present study was to investigate the association of PON1 Q192R and L55M polymorphisms with risk of SLE and associated APS among Egyptian sample. The study included 120 SLE patients (45 without APS and 75 with APS) and 120 healthy subjects. PON1 Q192R and L55M polymorphisms were genotyped by real-time PCR. No significant differences in Q192R genotypes or allele frequencies were found between patients and controls (p = 0...
February 9, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28177669/beta-sitosterol-up-regulated-paraoxonase-1-via-peroxisome-proliferator-activated-receptor-%C3%AE-in-irradiated-rats
#8
Enas Moustafa, Noura Magdy Thabet
This study was designed to evaluate the effect of Beta-sitosterol (BS) on the of peroxisome proliferator-activated receptor gamma (PPAR-γ) gene expression role in the activity of PON-1 enzyme in oxidative stress status of irradiated rats. Animals were exposed to whole body γ-radiation single dose 6Gy and received BS dose (40 mg•(kg body mass) -1•day -1, orally). In liver tissue, gene expression of PPAR-γ ligand was determined. Oxidative stress marker (malonyldialdehyde, MDA) and antioxidant enzymes activities (Superoxide dismutase; SOD Catalase; CAT, PON-1 and arylesterase; ARE) were assayed in serum and liver tissue...
January 24, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28176482/high-density-lipoprotein-associated-paraoxonase-1-activity-for-prediction-of-adverse-outcomes-in-outpatients-with-chronic-heart-failure
#9
Muhammad Hammadah, Andreas P Kalogeropoulos, Vasiliki V Georgiopoulou, Malory Weber, Yuping Wu, Stanley L Hazen, Javed Butler, W H Wilson Tang
AIMS: Decreased arylesterase (ArylE) activity of paraoxonase-1, a HDL-associated protein with anti-inflammatory and antioxidant properties, has been associated with increased risk of cardiac events in patients with ischaemic heart failure (HF). We aim to investigate the prognostic significance of changes in serum ArylE activity over time. METHODS AND RESULTS: We examined the association between baseline and follow-up serum ArylE activity and HF outcomes (death, cardiac transplantation, or ventricular assist device implantation) in 299 patients with HF enrolled in a prospective cohort study from January 2008 to July 2009, with 145 patients having available follow-up levels at 1 year...
February 7, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28166957/chemical-castration-in-cattle-with-intratesticular-injection-of-sodium-chloride-effects-on-stress-and-inflammatory-markers
#10
Fernando C Oliveira, Carlos E R Ferreira, Cristina S Haas, Leonardo G Oliveira, Rafael G Mondadori, Augusto Schneider, Monique T Rovani, Paulo B D Gonçalves, Arnaldo D Vieira, Bernardo G Gasperin, Thomaz Lucia
Intratesticular injection (ITI) of sodium chloride (NaCl) is efficient for chemical castration of young calves, but its effects on calves welfare are unknown. Two experiments were conducted to evaluate the effects of ITI of 20% NaCl on stress and inflammatory markers in calves less than 20 days old and to assess the efficiency of ITI of 30% NaCl in 5 months old calves. In Experiment 1, control calves were only restrained and compared to calves submitted to castration through surgery (SC) and ITI with 20% NaCl (n = 9/group)...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28161867/towards-understanding-the-catalytic-mechanism-of-human-paraoxonase-1-experimental-and-in-silico-mutagenesis-studies
#11
Rajan K Tripathy, Geetika Aggarwal, Priyanka Bajaj, Deepika Kathuria, Prasad V Bharatam, Abhay H Pande
Human paraoxonase 1 (h-PON1) is a ~45-kDa serum enzyme that can hydrolyze a variety of substrates, including organophosphate (OP) compounds. It is a potential candidate for the development of antidote against OP poisoning in humans. However, insufficient OP-hydrolyzing activity of native enzyme affirms the urgent need to develop improved variant(s) having enhanced OP-hydrolyzing activity. The crystal structure of h-PON1 remains unsolved, and the molecular details of how the enzyme catalyses hydrolysis of different types of substrates are also not clear...
February 4, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28160310/acute-phase-proteins-response-in-cats-naturally-infected-with-hepatozoon-felis-and-babesia-vogeli
#12
Hugo Vilhena, Asta Tvarijonaviciute, José J Cerón, Lisete Vieira, Josep Pastor, Ana C Silvestre-Ferreira
BACKGROUND: The measurement of acute phase proteins (APP) is being increasingly used in human and veterinary medicine in diagnosis, prognosis, treatment monitoring, and in general health screening. However, information about the APP response in cats infected with agents of vector-borne diseases is lacking. OBJECTIVES: The purpose of the study was to investigate the concentrations of serum amyloid A (SAA), haptoglobin (Hp), and paraoxonase-1 (PON1) in cats naturally infected with Hepatozoon felis and Babesia vogeli...
February 3, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28152406/anacetrapib-but-not-evacetrapib-impairs-endothelial-function-in-cetp-transgenic-mice-in-spite-of-marked-hdl-c-increase
#13
Branko Simic, Pavani Mocharla, Margot Crucet, Elena Osto, Adelheid Kratzer, Simona Stivala, Susan Kühnast, Thimoteus Speer, Petia Doycheva, Hans M Princen, Jose W van der Hoorn, J Wouter Jukema, Hector Giral, Anne Tailleux, Ulf Landmesser, Bart Staels, Thomas F Lüscher
BACKGROUND AND AIMS: High-density lipoprotein cholesterol (HDL-C) is inversely related to cardiovascular risk. HDL-C raising ester transfer protein (CETP) inhibitors, are novel therapeutics. We studied the effects of CETP inhibitors anacetrapib and evacetrapib on triglycerides, cholesterol and lipoproteins, cholesterol efflux, paraoxonase activity (PON-1), reactive oxygen species (ROS), and endothelial function in E3L and E3L.CETP mice. METHODS: Triglycerides and cholesterol were measured at weeks 5, 14 and 21 in E3L...
January 16, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28146259/increased-cardiac-sympathetic-activity-and-oxidative-stress-in-habitual-electronic-cigarette-users-implications-for-cardiovascular-risk
#14
Roya S Moheimani, May Bhetraratana, Fen Yin, Kacey M Peters, Jeffrey Gornbein, Jesus A Araujo, Holly R Middlekauff
Importance: Electronic cigarettes (e-cigarettes) have gained unprecedented popularity, but virtually nothing is known about their cardiovascular risks. Objective: To test the hypothesis that an imbalance of cardiac autonomic tone and increased systemic oxidative stress and inflammation are detectable in otherwise healthy humans who habitually use e-cigarettes. Design, Setting, and Participants: Cross-sectional case-control study of habitual e-cigarette users and nonuser control individuals from 2015 to 2016 at the University of California, Los Angeles...
February 1, 2017: JAMA Cardiology
https://www.readbyqxmd.com/read/28145863/the-association-between-paraoxonase-1-gene-polymorphisms-and-polycystic-ovarian-syndrome
#15
H F Gu, M Mou, Z G Liang, C Sun, X Y Ren, Y B Xiao
Some studies investigated the association of paraoxonase 1 (PON1) polymorphisms with polycystic ovarian syndrome (PCOS) risk. However, the result was still inconsistent. The aim of this study was to investigate whether there is an association between the PON1 polymorphisms and PCOS risk. Electronic databases, such as PubMed, EMBASE, and China National Knowledge Infrastructure (CNKI) databases, were searched for identification of the studies. The associations between PON1 polymorphisms and PCOS risk was quantified using ORs with 95% CIs...
December 30, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28108734/valproic-acid-inhibits-glioblastoma-multiforme-cell-growth-via-paraoxonase-2-expression
#16
Jen-Ho Tseng, Cheng-Yi Chen, Pei-Chun Chen, Sheng-Huang Hsiao, Chi-Chen Fan, Yu-Chih Liang, Chie-Pein Chen
We studied the potential mechanisms of valproic acid (VPA) in the treatment of glioblastoma multiforme (GBM). Using the human U87, GBM8401, and DBTRG-05MG GBM-derived cell lines, VPA at concentrations of 5 to 20 mM induced G2/M cell cycle arrest and increased the production of reactive oxygen species (ROS). Stress-related molecules such as paraoxonase 2 (PON2), cyclin B1, cdc2, and Bcl-xL were downregulated, but p27, p21 and Bim were upregulated by VPA treatment. VPA response element on the PON2 promoter was localized at position -400/-1...
January 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28103386/paraoxonase-1-activity-is-related-to-trichinella-spiralis-induced-hepatitis-in-rats
#17
Ayman Samir Farid, Eman Mohamed Fath, Shogo Mido, Nariaki Nonaka, Yoichiro Horii
BACKGROUND: Little is known about the potential adverse effects of a chronic zoonotic nematode Trichinella spiralis infection on hepatic inflammation and its relationship to paraoxonase (PON)-1 and butyrylcholinesterase (BuChE) activities. Therefore, we aimed to examine the effects of T. spiralis infection on hepatic synthesis of PON1. METHODS: Wistar rats were infected with 2500 first-stage larvae of T. spiralis and serum PON1 and BuChE activities were evaluated...
January 19, 2017: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28077734/intake-of-up-to-3-eggs-per-day-is-associated-with-changes-in-hdl-function-and-increased-plasma-antioxidants-in-healthy-young-adults
#18
Diana M DiMarco, Gregory H Norris, Courtney L Millar, Christopher N Blesso, Maria Luz Fernandez
BACKGROUND: HDL function may be more important than HDL concentration in determining risk for cardiovascular disease. In addition, HDL is a carrier of carotenoids and antioxidant enzymes, which protect HDL and LDL particles against oxidation. OBJECTIVE: The goal of this study was to determine the impact of consuming 0-3 eggs/d on LDL and HDL particle size, HDL function, and plasma antioxidants in a young, healthy population. METHODS: Thirty-eight healthy men and women [age 18-30 y, body mass index (in kg/m(2)) 18...
January 11, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28070599/organophosphate-neurotoxicity-to-the-voluntary-motor-system-on-the-trail-of-environment-caused-amyotrophic-lateral-sclerosis-the-known-the-misknown-and-the-unknown
#19
Samantha J Merwin, Teresa Obis, Yanelli Nunez, Diane B Re
Amyotrophic lateral sclerosis (ALS) is the most common adult-onset paralytic disorder. It is characterized by progressive degeneration of the motor neurons controlling voluntary movement. The underlying mechanisms remain elusive, a fact that has precluded development of effective treatments. ALS presents as a sporadic condition 90-95% of the time, i.e., without familial history or obvious genetic mutation. This suggests that ALS has a strong environmental component. Organophosphates (OPs) are prime candidate neurotoxicants in the etiology of ALS, as exposure to OPs was linked to higher ALS incidence among farmers, soccer players, and Gulf War veterans...
January 9, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28032682/antiepileptic-drugs-impacts-on-human-serum-paraoxonase-1
#20
Şükrü Beydemir, Yeliz Demir
Serum paraoxonase (PON1) is a key enzyme related to high-density lipoprotein (HDL)-cholesterol particle. It can prevent the oxidation of low-density lipoprotein (LDL) and HDL. The present article focuses on the in vitro inhibition role of some antiepileptic drugs (AEDs) such as valproic acid, gabapentin, primidone, phenytoin, and levetiracetam on human paraoxonase (hPON1). Therefore, PON1 was purified from human serum with a specific activity of 3976.36 EU/mg and 13.96% yield by using simple chromatographic methods...
December 29, 2016: Journal of Biochemical and Molecular Toxicology
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