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      Association of uricemia with biochemical and dietary factors in human adults with metabolic syndrome genotyped to C677T polymorphism in the methylenetetrahydrofolate reductase gene Translated title: Asociación de la uricemia con factores bioquímicos y dietéticos en humanos adultos con síndrome metabólico genotipados para el polimorfismo C677T en el gen metilenotetrahidrofolato reductasa

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          Abstract

          It is suggested that hyperuricemia is a marker of cardiovascular risk in human adults with metabolic syndrome (MS). The C677T polymorphism in the gene encoding the enzyme methylenetetrahydrofolate reductase (MTHFR) is associated with hyperuricemia. Data on factors associated with uricemia in human adults with MS genotyped for this polymorphism are lacking. We aimed to investigate the factors associated with uricemia in human adults with MS genotyped for the C677T polymorphism in the MTHFR gene. Cross-sectional study was conducted with 63 human adults (24 men and 39 women) with MS. Body weight, body mass index, waist circumference, body fat, glycemia, lipid profile, uricemia, insulinemia, homocysteinemia, plasma folate, erythrocyte folate, blood pressure, smoking, diuretics use, usual dietary alcohol and protein intakes, MTHFR and the presence of the C677T polymorphism in the gene were assessed. Hyperuricemia was observed in 16 (25.4%) human adults (10 men and 6 women). In the group, 33% (n = 21) showed the C677T polymorphism, being 19 heterozygous and 2 mutant homozygous. A significant association between hyperuricemia and C677T polymorphism was not verified. Uricemia was positively associated with homocys-teinemia (r = 0.43, p < 0.05), triglyceridemia (r = 0.41, p<0.05), serum concentrations of very-low-density lipoprotein (r = 0.27, p< 0.05) and the habitual alcohol intake (r = 0.37, p < 0.05). However, only homocysteinemia, triglyc-eridemia, and habitual alcohol intake remained in the final model of linear regression. In human adults with MS geno-typed for the C677T polymorphism in the MTHFR gene, uricemia was positively associated with homocysteinemia, triglyceridemia and the habitual alcohol intake.

          Translated abstract

          Sugérese que la hiperuricema sea un factor de riesgo cardiovascular en humanos adultos con síndrome meta-bólico (SM) El polimorfismo C677T en el gen metilenote-trahidrofolato reductasa (MTHFR) ha sido asociado com la hiperuricemia. Datos sobre los factores asociados con la uricemia en humanos adultos con SM genotipados para el polimorfismo C677T en el gen MTHFR son inexistentes. Se objetivó investigar los factores asociados con la uricemia en individuos con SM genotipados para el polimorfismo C677T.Se ha realizado un estudio transversal con 63 humanos adultos (24 hombres y 39 mujeres). Fueron evaluados peso, altura, índice de masa corporal, circunferencia de la cintura, grasa corporal total, glucemia, uricemia, insulinemia, homocisteinemia, folato plasmático, folato en los eritrocitos, presión arterial, tabaquismo, uso de diuréticos, ingesta habitual de proteínas dietéticas y de alcohol y la presencia del polimorfismo C677T. No fue encontrado asociación significativa entre el polimorfismo C677T y la uricemia. Fue verificado que un 25,4% (n = 16) ddo los individuos presentaban hiperuri-cemia (10 hombres y 6 mujeres). Se verificó que un 33% (n = 21) de olos individuos presentaron el polimorfismo C677T (19 heterocigotos y 2 homocigotos polimórficos). La uricemia se asoció con los niveles de homocisteina (r = 0,43, p < 0,05), trigicéridos (r = 0,41, p < 0,05) y de lipo-proteínas de muy baja densidad (r = 0.27, p < 0,05) y con la ingesta de alcohol (r = 0,37, p < 0,05). Sin embargo, sólo la homocisteinemia, la trigliceridemia y la ingesta habitual de alcohol permanecerán en el modelo final de regresión lineal. En los humanos adultos con SM genotipados para el polimorfismo C677T en el gen MTHFR, la uricemia se asoció positivamente con los niveles de homocisteína y triglicéridos y con la ingesta habitual de alcohol.

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          Chelex 100 as a medium for simple extraction of DNA for PCR-based typing from forensic material.

          Procedures utilizing Chelex 100 chelating resin have been developed for extracting DNA from forensic-type samples for use with the PCR. The procedures are simple, rapid, involve no organic solvents and do not require multiple tube transfers for most types of samples. The extraction of DNA from semen and very small bloodstains using Chelex 100 is as efficient or more efficient than using proteinase K and phenol-chloroform extraction. DNA extracted from bloodstains seems less prone to contain PCR inhibitors when prepared by this method. The Chelex method has been used with amplification and typing at the HLA DQ alpha locus to obtain the DQ alpha genotypes of many different types of samples, including whole blood, bloodstains, seminal stains, buccal swabs, hair and post-coital samples. The results of a concordance study are presented in which the DQ alpha genotypes of 84 samples prepared using Chelex or using conventional phenol-chloroform extraction are compared. The genotypes obtained using the two different extraction methods were identical for all samples tested.
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            Serum uric acid and risk for cardiovascular disease and death: the Framingham Heart Study.

            Hyperuricemia is associated with risk for cardiovascular disease and death. However, the role of uric acid independent of established risk factors is uncertain. To examine the relation of serum uric acid level to incident coronary heart disease, death from cardiovascular disease, and death from all causes. Community-based, prospective observational study. Framingham, Massachusetts. 6763 Framingham Heart Study participants (mean age, 47 years). Serum uricacid level at baseline (1971 to 1976); event rates per 1000 person-years by sex-specific uric acid quintile. During 117,376 person-years of follow-up, 617 coronary heart disease events, 429 cardiovascular disease deaths, and 1460 deaths from all causes occurred. In men, after adjustment for age, elevated serum uric acid level was not associated with increased risk for an adverse outcome. In women, after adjustment for age, uric acid level was predictive of coronary heart disease (P = 0.002), death from cardiovascular disease (P = 0.009), and death from all causes (P = 0.03). After additional adjustment for cardiovascular disease risk factors, uric acid level was no longer associated with coronary heart disease, death from cardiovascular disease, or death from all causes. In a stepwise Cox model, diuretic use was identified as the covariate responsible for rendering serum uric acid a statistically nonsignificant predictor of outcomes. These findings indicate that uric acid does not have a causal role in the development of coronary heart disease, death from cardiovascular disease, or death from all causes. Any apparent association with these outcomes is probably due to the association of uric acid level with other risk factors.
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              Principles of nutritional assesMSent

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                nh
                Nutrición Hospitalaria
                Nutr. Hosp.
                Grupo Arán (Madrid, Madrid, Spain )
                0212-1611
                1699-5198
                April 2011
                : 26
                : 2
                : 298-303
                Affiliations
                [01] Río de Janeiro orgnameUniversidade Federal do Rio de Janeiro orgdiv1Instituto de Nutriçâo Josué de Castro orgdiv2Departamento de Nutriçâo e Dietética Brasil
                Article
                S0212-16112011000200009
                63bdeb87-5411-4f65-aa6e-621bf471e682

                This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 International License.

                History
                : 24 June 2010
                : 30 November 2009
                : 21 May 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 34, Pages: 6
                Product

                SciELO Spain


                Uricemia,Síndrome metabólico,Enfermedades cardiovasculares,Polimorfismo C677T, en el gen MTHFR,Metabolic syndrome,Cardiovascular disease,C677T polymorphism in the MTHFR gene

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