Navegando por Autor "Barbosa Júnior, Fernando"
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Artigo Association between exposure to plasma mixture of essential and toxic elements and the lipid profile in institutionalized older adults(Journal of Trace Elements in Medicine and Biology, 2024-09) Evangelista, Karine Cavalcanti Maurício de Sena; Pacheco, Daniela Antunes; Campêlo, Angélica Lopes de Sousa; Sousa, Sara Estéfani Soares de; Sales, Márcia Cristina; Barbosa Júnior, Fernando; Lima, Kenio Costa; Ferreira, Marcelo Rodrigo Portela; Reis, Bruna Zavarize; Pedrosa, Lucia Fatima CamposBackground: Older adults have a progressive deficiency in the ability to detoxify chemical elements and are susceptible to dyslipidemia and changes in glycemic control. The objective was to evaluate the association of the mixture of essential and toxic elements in the plasma of institutionalized older adults and test the associations with lipid profile variables and glycemic control. Methods: Data were obtained from 149 Brazilian older adults aged ≥60 living in nursing homes (NH) in Natal, Brazil. The concentrations of sixteen chemical elements in plasma and lipid profile parameters and glycemic control of 149 institutionalized older adults were measured. Bayesian kernel machine regression was used to estimate the associations of the mixture of chemical elements with total cholesterol (TC), high-density lipoprotein (HDL-c), low-density lipoprotein (LDL-c), triglycerides (TG), fasting glucose, and glycated hemoglobin. ResultsNon-linear responses to exposure were observed for iron (Fe) about TC, LDL-c, and TG, and for barium (Ba) and copper (Cu) about TG. The concentration of the mixture of chemical elements below the 35th percentile was associated with a decrease in TC. Fe was the main element in the effect of the mixture associated with TC.ConclusionsThe lower concentrations of the mixture of chemical elements in plasma had a protective effect on the increase in TC, with Fe being the main element. Considering the results, the levels of essential and toxic elements in the plasma of older adults require extensive screening, mainly to prevent dyslipidemia and monitor clinical interventionsDissertação Elementos essenciais e tóxicos e suas relações com os fatores de risco cardiometabólicos em adultos e idosos(Universidade Federal do Rio Grande do Norte, 2021-09-23) Nunes, Francisca Leide da Silva; Evangelista, Karine Cavalcanti Mauricio de Sena; Barbosa Júnior, Fernando; 67002846191; http://lattes.cnpq.br/5072630975779407; http://lattes.cnpq.br/2628723272728505; http://lattes.cnpq.br/9461912110266941; Maia, Carla Soraya Costa; http://lattes.cnpq.br/2879750916488596; Reis, Bruna Zavarize; http://lattes.cnpq.br/0683344477426879Evidências sugerem uma relação entre as concentrações de elementos essenciais e tóxicos e o agravo de fatores de risco cardiometabólicos. Este estudo objetivou investigar as concentrações de zinco, cobre, selênio, arsênio, cádmio e mercúrio e suas relações com fatores de risco cardiometabólicos em adultos e idosos. Este trabalho de delineamento transversal foi realizado com 112 indivíduos de ambos os sexos, residentes no município de Natal/RN, participantes do Estudo Brazilian Usual Consumption Assessment (BRAZUCA) Natal. Foram coletados dados sociodemográficos, clínicos e estilo de vida. Avaliou-se parâmetros antropométricos (perímetro da cintura – PC e índice de adiposidade visceral – VAI), perfil glicêmico e lipídico, pressão arterial e proteína C-reativa ultra sensível (PCR-us). Foi calculado o Escore de Risco Global (ERG) e definido o risco cardiovascular. As concentrações dos elementos químicos essenciais foram medidas no plasma e, dos tóxicos, na urina, considerando a técnica de espectrometria de massas com plasma indutivamente acoplado (ICP-MS). Foram construídos modelos de regressão linear múltipla, ajustados por idade, sexo, índice de massa corporal (IMC), tabagismo e frequência de consumo de bebidas alcoólicas, para identificar a relação dos elementos químicos com os fatores de risco cardiometabólicos. Observou-se associação inversa entre o arsênio na urina e o índice de adiposidade visceral (VAI) (β -0,03, R² 18,22, p<0,01), triglicerídeos (β -1,11, R² 25,09, p<0,01) e fração de VLDL colesterol (β -0,14, R² 16,01, p=0,02). Foram observadas associações diretas entre cobre no plasma (β 0,38, R² 7,55, p<0,01) e a razão cobre/zinco com a glicemia de jejum (β 36,02, R² 6,58, p=0,01) e PCR-us (cobre no plasma: β 0,004, R² 12,40, p<0,01; razão cobre/zinco: β 0,68, R² 25,14, p<0,001). A pressão arterial sistólica foi inversamente associada com as concentrações urinárias de arsênio (β -0,14, R² 15,87, p=0,04) e cádmio (β -36,42, R² 21,34, p=0,04) e, a pressão arterial diastólica associou-se inversamente com o cádmio na urina (β -21,55, R² 7,47, p=0,03) e, diretamente, com mercúrio na urina (β 1,45, R² 7,17, p=0,03). Em conclusão, os elementos essenciais e tóxicos em diferentes matrizes biológicas estiveram associados com os fatores de risco cardiometabólicos, sugerindo a ampliação de estudos que confirmem a utilidade desses elementos como preditores do risco cardiovascular.Artigo Plasma concentration of essential and toxic trace elements after Brazil nut intake: results from a randomized controlled trial(Biological Trace Element Research, 2022-04) Reis, Bruna Zavarize; Duarte, Graziela Biude Silva; Rogero, Marcelo Macedo; Barbosa Júnior, Fernando; Cercato, Cintia; Cozzolino, Silvia Maria FranciscatoBrazil nut (BN) is a good source of essential nutrients, but little is known about the content of other components, such as toxic elements. Moreover, the high consumption of BN could probably contribute to increased levels of toxic and essential elements in the blood. Thus, this study aimed to evaluate the concentration of essential and toxic trace elements in BN and their concentration in plasma of obese women after regular intake of BN. A randomized controlled clinical trial was carried out with 55 subjects that were randomly assigned to either the Brazil nut group (BN) (n = 29) or the control group (CO) (n = 26) and followed up for 2 months. The BN group consumed one unit of Brazil nut per day, and the CO group did not receive any intervention. The concentration of essential elements (zinc, copper, manganese, and cobalt) and toxic (barium, lead, and cadmium) in BN samples and plasma of obese women (before and after the intervention) were determined by inductively coupled plasma mass spectrometry. Barium followed by copper, and manganese were the trace elements present in higher amounts in Brazil nuts. After the BN intervention period was observed an increase in plasma cadmium (p = 0.002) and a reduction of plasma manganese (p < 0.001) levels. In conclusion, our fndings suggest that the regular consumption of BN from the Brazilian Amazon rainforest contributes to the intake of essential trace elements and can be considered safe regarding the content of heavy metalsArtigo Plasma lipid metabolites as potential biomarkers for identifying individuals at risk of obesity-induced metabolic complications(Scientific Reports, 2023) Lima, Severina Carla Vieira Cunha; Bellot, Paula Emília Nunes Ribeiro; Braga, Erik Sobrinho; Omage, Folorunsho Bright; Nunes, Francisca Leide da; Lyra, Clélia Oliveira; Marchioni, Dirce Maria Lobo; Pedrosa, Lucia Fatima Campos; Barbosa Júnior, Fernando; Tasic, Ljubica; Evangelista, Karine Cavalcanti Maurício Sena; https://orcid.org/0000-0001-8268-1986Lipidomics studies have indicated an association between obesity and lipid metabolism dysfunction. This study aimed to evaluate and compare cardiometabolic risk factors, and the lipidomic profile in adults and older people. A cross-sectional study was conducted with 72 individuals, divided into two sex and age-matched groups: obese (body mass index—BMI ≥ 30 kg/m2; n = 36) and non-obese (BMI < 30 kg/m2; n = 36). The lipidomic profiles were evaluated in plasma using 1H nuclear magnetic resonance (1H-NMR) spectroscopy. Obese individuals had higher waist circumference (p < 0.001), visceral adiposity index (p = 0.029), homeostatic model assessment insulin resistance (HOMA-IR) (p = 0.010), and triacylglycerols (TAG) levels (p = 0.018). 1H-NMR analysis identified higher amounts of saturated lipid metabolite fragments, lower levels of unsaturated lipids, and some phosphatidylcholine species in the obese group. Two powerful machine learning (ML) models—k-nearest neighbors (kNN) and XGBoost (XGB) were employed to characterize the lipidomic profile of obese individuals. The results revealed metabolic alterations associated with obesity in the NMR signals. The models achieved high accuracy of 86% and 81%, respectively. The feature importance analysis identified signal at 1.50–1.60 ppm (–CO–CH2–CH2–, Cholesterol and fatty acid in TAG, Phospholipids) to have the highest importance in the two models.Artigo The impact of essential and toxic elements on cardiometabolic risk factors in adults and older people(Journal of Trace Elements In Medicine and Biology, 2022-06) Lyra, Clelia de Oliveira; Nunes, Francisca Leide da Silva; Lima, Severina Carla Vieira Cunha; Marchioni, Dirce Maria; Pedrosa, Lucia Fatima Campos; Barbosa Júnior, Fernando; Evangelista, Karine Cavalcanti Maurício SenaBackground and aim: Evidence suggests an association between essential and toxic elements and the worsening of cardiometabolic risk factors. This study aimed to investigate the concentrations of zinc, copper, selenium, arsenic, cadmium, and mercury and their relationship with cardiometabolic risk factors in adults and older people. Methods: This cross-sectional study was carried out with 112 adults with a mean age of 59 (sd 14) years old and a BMI of 29.30 (sd 5.11) Kg/m2 . The subject’s weight and height were measured for body mass index (BMI) calculation, classified according to the cut-off points recommended by the World Health Organization (WHO). We evaluated sociodemographic, clinical, lifestyle, waist circumference – WC, visceral adiposity index - VAI, glycemic lipid profile, blood pressure, and high-sensitive C-reactive protein (hs-CRP). Cardiovascular risk was defined by The Global Risk Score (GRS) score. Plasma zinc, selenium, copper levels, urinary arsenic, cadmium, and mercury levels were measured using the inductively coupled plasma mass spectrometry technique (ICP-MS). Results: There was a negative association between urinary arsenic and VAI (β − 0.03, p < 0.01), triglycerides (β − 1.10, p < 0.01), and VLDL cholesterol (β − 0.14, p = 0.02). Plasma copper and copper/zinc ratio were positively associated with fasting glucose and hs-CRP (β 0.38, p < 0.01; β 36.02, p = 0.01, β 0.004, p < 0.01, β 0.68, p < 0.001, respectively). Urinary arsenic (β − 0.14, p = 0.04) and cadmium (β − 36.42, p = 0.04) were negatively associated with systolic blood pressure. Also, urinary cadmium was negatively associated with diastolic blood pressure (β − 21.55, p = 0.03), and urinary mercury showed an opposite behavior (β 1.45, p = 0.03). Conclusion: Essential and toxic elements in urine and plasma could be potential biomarkers for cardiovascular risk factors. A healthy lifestyle should be adopted; in addition, government policies should be developed to guarantee sustainable production and a safe environment