Bressan, J. (J.)
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- Dietary total antioxidant capacity is inversely related to central adiposity as well as to metabolic and oxidative stress markers in healthy young adults(BioMed Central, 2011) Martinez, J.A. (José Alfredo); Hermsdorff, H.H. (H. H.); Barbosa, K.B. (K.B.); Zulet, M.A. (María Ángeles); Volp, A.C.P. (Ana Carolina P.); Puchau, B. (Blanca); Bressan, J. (J.)BACKGROUND: Dietary total antioxidant capacity (TAC) has been assumed as a useful tool to assess the relationship between the cumulative antioxidant food capacity and several chronic disorders. The aim of this cross-sectional study was to investigate the potential relationships of dietary TAC with adiposity, metabolic and oxidative stress markers in healthy young adults. METHODS: This study enrolled 266 healthy subjects (105 men/ 161 women; 22 ± 3 years-old; 22.0 ± 2.7 kg/m2). Dietary intake, anthropometry, blood pressure, lifestyle features, and biochemical data were assessed with validated procedures. RESULTS: In linear regression analyses, dietary TAC values were inversely associated with glycemia, total cholesterol:HDL-c ratio, triglycerides and oxidized-LDL concentrations, and positively associated with HDL-c concentrations, independently of gender, age, smoking status, physical activity, vitamin use supplement, waist circumference, energy intake, fatty acid intake. In addition, plasma TAC was negatively correlated with ox-LDL concentrations (r= -0.20, P = 0.003), independently of the assessed confounding variables. Finally, dietary TAC values were inversely related to waist circumference values (r= -0.17, P = 0.005) as well as to lower mild central obesity occurrence (waist circumference ≥ 80/ 94 cm for women/ men, respectively). CONCLUSION: Dietary TAC values are inversely associated with glucose and lipid biomarkers as well as with central adiposity measurements in healthy young adults, indicating dietary TAC as a useful tool to assess the health benefits of cumulative antioxidant capacity from food intake. In addition, the independent and inverse relationships of ox-LDL concentrations with dietary and plasma TAC respectively suggest a putative role of antioxidant rich-diet in the link between redox state and atherogenesis at early stage.
- Effectiveness of prediction equations in estimating energy expenditure sample of Brazilian and Spanish women with excess body weight(Sociedad Española de Nutrición Parenteral y Enteral, 2014) Martinez, J.A. (José Alfredo); Lopes-Rosado, E. (Eliane); Santiago-de-Brito, R. (Roberta); Bressan, J. (J.)Objective: To assess the adequacy of predictive equations for estimation of energy expenditure (EE), compared with the EE using indirect calorimetry in a sample of Brazilian and Spanish women with excess body weight Methods: It is a cross-sectional study with 92 obese adult women [26 Brazilian -G1- and 66 Spanish - G2- (aged 20-50)]. Weight and height were evaluated during fasting for the calculation of body mass index and predictive equations. EE was evaluated using the opencircuit indirect calorimetry with respiratory hood. Results: In G1 and G2, it was found that the estimates obtained by Harris-Benedict, Shofield, FAO/WHO/ ONU and Henry & Rees did not differ from EE using indirect calorimetry, which presented higher values than the equations proposed by Owen, Mifflin-St Jeor and Oxford. For G1 and G2 the predictive equation closest to the value obtained by the indirect calorimetry was the FAO/WHO/ONU (7.9% and 0.46% underestimation, respectively), followed by Harris-Benedict (8.6% and 1.5% underestimation, respectively). Conclusion: The equations proposed by FAO/WHO/ ONU, Harris-Benedict, Shofield and Henry & Rees were adequate to estimate the EE in a sample of Brazilian and Spanish women with excess body weight. The other equations underestimated the EE.
- Influencia de la dieta sobre marcadores plasmáticos de estrés oxidativo en humanos(2008) Martinez, J.A. (José Alfredo); Barbosa, K.B. (K.B.); Zulet, M.A. (María Ángeles); Bressan, J. (J.)La instauración del estrés oxidativo se relaciona con la existencia de un desequilibrio entre los sistemas oxidativos y antioxidantes, a favor de los primeros. Tal proceso se ha involucrado en el desarrollo de las enfermedades crónicas no transmisibles, entre ellas: obesidad, aterogénesis, diabetes, transtornos neurodegenerativos y cáncer. El estrés oxidativo se controla a través de sistemas de defensa antioxidantes, incluyendo mecanismos enzimáticos y no enzimáticos. Este último grupo se refiere, sobre todo, a los antioxidantes de origen dietético, especialmente, vitaminas, minerales y fitoquímicos (polifenoles y carotenoides). De ello, deriva la importancia de la dieta como factor involucrado en la modulación del estrés oxidativo. Las implicaciones y efectos de los antioxidantes dietéticos sobre el proceso oxidativo pueden ser evaluados por medio de diversos biomarcadores específicos. Estos indicadores incluyen sobre todo, a los productos derivados de la oxidacion de lípidos, proteínas y ácidos nucleicos por radicales libres y especies reactivas de oxígeno. Por otra parte, los marcadores basados en la valoración de la capacidad antioxidante son también indicadores del estrés oxidativo. Los estudios que abordan la dieta como factor que modula el estrés oxidativo, se basan, preferentemente, en el efecto de las vitaminas y minerales (estudios de suplementación), alimentos y bebidas (fuentes de compuestos antioxidantes) o patrones dietéticos. Algunos estudios han logrado describir efectos beneficiosos sobre los marcadores del estrés oxidativo. No obstante, todavía, los resultados no son del todo concluyentes, presentándose una importante heterogeinidad metodológica en cuanto a las condiciones de los sujetos y de las intervenciones dietéticas evaluadas, así como sobre la interpretación de los resultados y su incidencia sobrre la salud.
- Relationship of oxidized low density lipoprotein with lipid profile and oxidative stress markers in healthy young adults: a translational study(Biomed Central, 2011) Martinez, J.A. (José Alfredo); Hermsdorff, H.H. (H. H.); Barbosa, K.B. (K.B.); Zulet, M.A. (María Ángeles); Volp, A.C.P. (Ana Carolina P.); Navarro-Blasco, I. (Iñigo); Bressan, J. (J.)BACKGROUND: Despite oxidized low density lipoprotein (ox-LDL) plays important roles in the pro-inflammatory and atherosclerotic processes, the relationships with metabolic and oxidative stress biomarkers have been only scarcely investigated in young adult people. Thus, the aim of this study was to assess plasma ox-LDL concentrations and the potential association with oxidative stress markers as well as with anthropometric and metabolic features in healthy young adults. METHODS: This study enrolled 160 healthy subjects (92 women/68 men; 23±4 y; 22.0±2.9 kg/m2). Anthropometry, body composition, blood pressure, lifestyle features, biochemical data, and oxidative stress markers were assessed with validated tools. Selenium, copper, and zinc nail concentrations were measured by atomic absorption spectrophotometry. RESULTS: Total cholesterol (TC), LDL-c and uric acid concentrations, TC-to-HDL-c ratio, and glutathione peroxidase (GPx) activity were positive predictors of ox-LDL concentrations, while nail selenium level (NSL) was a negative predictor, independently of gender, age, smoking status, physical activity. Those individuals included in the highest tertile of GPx activity (≥611 nmol/[mL/min]) and of NSL (≥430 ng/g of nail) had higher and lower ox-LDL concentrations, respectively, independently of the same covariates plus truncal fat or body mass index, and total cholesterol or LDL-c concentrations. CONCLUSIONS: Ox-LDL concentrations were significantly associated with lipid biomarkers, GPx activity, uric acid concentration, and NSL, independently of different assayed covariates, in young healthy adults. These findings jointly suggest the early and complex relationship between lipid profile and redox status balance.
- Dietas adelgazantes(2002) Lopes-Rosado, E. (Eliane); Bressan, J. (J.); Russolillo-Femenías, G. (Giuseppe); Marques-Lopes, I. (Iva)Dietetic intervention has the following aims: to achieve a negative energy balance, obtain a healthy weight in the obese person and achieve the installation of healthy eating habits in order to maintain weight loss in the long term. Considering dietetic treatment of obesity as a process that is maintained for long periods of time, dietetic intervention should be carried out depending on the physio-pathological and psycho-social characteristics of the obese person. Besides, dietetic therapy should be balanced, healthy and adapted to the eating preferences of the patient. Over the years, due to need and the quest for rapid weight loss, magic diets have been occasioned, created and invented that have become popular and that lack proven efficacy and scientific rigour. This paper makes reference to a balanced hypocaloric diet and reviews the slimming diets that are best known and most used by the obese and/or overweight population.
- Dietary inflammatory index and prevalence of overweight and obesity in Brazilian graduates from the Cohort of Universities of Minas Gerais (CUME project)(Elsevier, 2020) Martinez-Gonzalez, M.A. (Miguel Ángel); Hermsdorff, H.H. (H. H.); Shivappa, N. (Nitin); Bressan, J. (J.); Moreira-Silva, T. (Thatianne); Hebert, J.R. (James R.); Marcal-Pimenta, A. (Adriano)Objectives: The aim of this study was to evaluate the independent association of the dietary inflammatory index (DII ) score with overweight and obesity in Brazilian participants of the Cohort of Universities of Minas Gerais (CUME project). Methods: This was a cross-sectional study consisting of 3,151 graduates and postgraduates (2197 women) with a mean (SD) age of 36.3 y (§9.4 y). Sociodemographic characteristics, lifestyle, and anthropometric data were assessed via online self-reported questionnaire. Additionally, a validated food frequency questionnaire with 144 food items was used to generate energy-adjusted DII (E-DIITM) scores, which evaluated the inflammatory potential of the diet. Results: The prevalence of overweight and obesity were 28.2% and 11%, respectively. Participants in the highest E-DII quartile (most proinflammatory diet) were more likely to be smokers/former smokers; sedentary; and consumers of red and ultra-processed meats, fats and oils (excluding olive oil), bottled fruit juices and soft drinks, sugars, sweets, and higher overall caloric intake, compared with the first quartile of E-DII. Both men and women in the fourth E-DII quartile had the highest prevalence of overweight and obesity (prevalence ratio [PR], 1.35; 95% confidence interval [CI], 1.14 1.59 and PR, 1.97; 95% CI, 1.20 3.22, respectively, in men; PR, 1.38; 95% CI, 1.17 to 1.65 and PR, 1.95; 95% CI, 1.31 2.90, respectively, in women). Conclusion: The most proinflammatory dietary pattern was associated with a higher prevalence of overweight and obesity and other unhealthy lifestyles including being sedentary, smoking, and consuming a obesogenic diet.