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1.
Rev. bras. med. esporte ; 28(5): 602-608, Set.-Oct. 2022. tab, graf
Article in English | LILACS-Express | LILACS | ID: biblio-1376684

ABSTRACT

ABSTRACT Introduction: Vitamin E supplementation may protect against exercise-induced muscle damage (EIMD) through possible inhibition of free radical formation and cell membrane stabilization. However, there is no systematic review of this topic. This fact maintains academic stalemates that may have a resolution. Objective: This systematic review with meta-analysis aims to provide a comprehensive literature review on the hypothesis of the benefit of vitamin E supplementation on oxidative stress and muscle damage induced by aerobic exercise. Methods: A random-effects model was used, weighted mean difference (WMD) and 95% confidence interval (CI) were applied to estimate the overall effect. Results: The results revealed a significant effect of vitamin E supplementation on reducing creatine kinase (CK) and lactate dehydrogenase (LDH). In addition, a subgroup analysis resulted in a significant decrease in CK concentrations in trials with immediate and <24 hours post-exercise CK measurement; <1000 at daily vitamin E intake; ≤1 at weekly intake; 1 at six weeks and >6 weeks experimental duration, studies on aerobic exercise and training were part of the crossover study. Conclusion: Vitamin E can be seen as a priority agent for recovery from muscle damage. Evidence Level II; Therapeutic Studies - Investigating the results.


RESUMO Introdução: A suplementação de vitamina E pode ter um efeito protetor contra danos musculares induzidos pelo exercício (EIMD) através da possível inibição da formação radical livre e estabilização da membrana celular. Todavia, não há uma revisão sistemática sobre esse tema. Tal fato mantém empasses acadêmicos que podem ter uma resolução. Objetivo: Esta revisão sistemática com meta-análise objetiva fornecer uma análise bibliográfica abrangente na hipótese do benefício na suplementação de vitaminas E sobre o estresse oxidativo e os danos musculares induzidos pelo pelo exercício aeróbico. Métodos: Foi utilizado um modelo com efeitos aleatórios, diferença média ponderada (ADM) e intervalo de confiança de 95% (IC) foram aplicados para estimar o efeito geral. Resultados: Os resultados revelaram um efeito significativo da suplementação de vitamina E na redução da creatina-quinase (CK) e lactato-desidrogenase (LDH). Além disso, uma análise do subgrupo resultou em uma diminuição significativa das concentrações de CK em ensaios com medição imediata e <24 horas de CK após o exercício; <1000 no consumo diário de vitamina E; ≤1 no consumo semanal; 1 em 6 semanas e >6 semanas de duração experimental, estudos sobre exercício aeróbico e treinamento fizeram parte do estudo cruzado. Conclusão: A vitamina E pode ser vista como um agente prioritário de recuperação de danos musculares. Nível de evidência II; Estudos Terapêuticos - Investigação de Resultados.


RESUMEN Introducción: La suplementación con vitamina E puede tener un efecto protector contra el daño muscular inducido por el ejercicio (EIMD) a través de la posible inhibición de la formación de radicales libres y la estabilización de la membrana celular. Sin embargo, no existe ninguna revisión sistemática sobre este tema. Este hecho mantiene un impasse académico que puede tener resolución. Objetivo: Esta revisión sistemática con meta-análisis tiene como objetivo proporcionar una amplia revisión de la literatura sobre la hipótesis del beneficio de la suplementación con vitamina E sobre el estrés oxidativo y el daño muscular inducido por el ejercicio aeróbico. Métodos: Se utilizó un modelo de efectos aleatorios, se aplicó la diferencia de medias ponderada (DMP) y el intervalo de confianza (IC) del 95% para estimar el efecto global. Resultados: Los resultados revelaron un efecto significativo de la suplementación con vitamina E en la reducción de la creatina quinasa (CK) y la lactato deshidrogenasa (LDH). Además, un análisis de subgrupos dio como resultado una disminución significativa de las concentraciones de CK en los ensayos con medición de CK inmediata y <24 horas después del ejercicio; <1000 en la ingesta diaria de vitamina E; ≤1 en la ingesta semanal; 1 en 6 semanas y >6 semanas de duración experimental, los estudios sobre el ejercicio aeróbico y el entrenamiento formaron parte del estudio cruzado. Conclusión: La vitamina E puede resultar un agente prioritario para la recuperación del daño muscular. Nivel de evidencia II; Estudios terapéuticos - Investigación de resultados.

2.
Int. j. morphol ; 40(3): 697-705, jun. 2022. ilus, tab
Article in English | LILACS-Express | LILACS | ID: biblio-1385688

ABSTRACT

SUMMARY: An association between certain food additives and chronic diseases is reported. Current study determined whether administering toxic doses of the food additive monosodium glutamate (MSG) into rats can induce aortopathy in association with the oxidative stress and inflammatory biomarkers upregulation and whether the effects of MSG overdose can be inhibited by vitamin E. MSG at a dose of (4 mg/kg; orally) that exceeds the average human daily consumption by 1000x was administered daily for 7 days to the rats in the model group. Whereas, rats treated with vitamin E were divided into two groups and given daily doses of MSG plus 100 mg/ kg vitamin E or MSG plus 300 mg/kg vitamin E. On the eighth day, all rats were culled. Using light and electron microscopy examinations, a profound aortic injury in the model group was observed demonstrated by damaged endothelial layer, degenerated smooth muscle cells (SMC) with vacuoles and condensed nuclei, vacuolated cytoplasm, disrupted plasma membrane, interrupted internal elastic lamina, clumped chromatin, and damaged actin and myosin filaments. Vitamin E significantly protected aorta tissue and cells as well as inhibited MSG-induced tissue malondialdehyde (MDA), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α). The highest used vitamin E dosage was more effective. Additionally, a significant correlation was observed between the aortic injury degree and tissue MDA, TNF-α, IL-6, and superoxide dismutase (SOD) levels (p=0.001). Vitamin E effectively protects against aortopathy induced by toxic doses of MSG in rats and inhibits oxidative stress and inflammation.


RESUMEN: Se reporta una asociación entre ciertos aditivos alimentarios y enfermedades crónicas. El objetivo de este estudio fue determinar si la administración de dosis tóxicas del aditivo alimentario glutamato monosódico (MSG) en ratas puede inducir aortopatía en asociación con el estrés oxidativo y la regulación positiva de los biomarcadores inflamatorios y si el efecto de una sobredosis de MSG se puede inhibir con vitamina E. Se administró MSG diariamente durante 7 días una dosis de (4 g/kg; por vía oral) que excede el consumo diario humano promedio, en 1000x a las ratas del grupo modelo. Mientras que las ratas tratadas con vitamina E se dividieron en dos grupos y se administraron dosis diarias de MSG más 100 mg/kg de vitamina E o MSG más 300 mg/kg de vitamina E. Todas las ratas fueron sacrificadas en el octavo día. Usando exámenes de microscopía óptica y electrónica, se observó una lesión aórtica profunda en el grupo modelo demostrada por una capa endotelial dañada, células musculares lisas degeneradas (SMC) con vacuolas y núcleos condensados, citoplasma vacuolado, membrana plasmática rota, lámina elástica interna interrumpida, cromatina agrupada y filamentos de actina y miosina dañados. La vitamina E protegió significativamente el tejido y las células de la aorta, además de inhibir el malondialdehído tisular (MDA) inducido por MSG, la interleucina-6 (IL-6) y el factor de necrosis tumoral alfa (TNF-α). La dosis más alta de vitamina E utilizada fue más efectiva. Además, se observó una correlación significativa entre el grado de lesión aórtica y los niveles tisulares de MDA, TNF-α, IL-6 y superóxido dismutasa (SOD) (p=0,001). La vitamina E efectivamente protege contra la aortopatía inducida por dosis tóxicas de MSG en ratas e inhibe el estrés oxidativo y la inflamación.


Subject(s)
Animals , Rats , Aorta/drug effects , Aortic Diseases/chemically induced , Sodium Glutamate/toxicity , Vitamin E/pharmacology , Aorta/pathology , Sodium Glutamate/administration & dosage , Vitamin E/administration & dosage , Microscopy, Electron , Interleukin-6/antagonists & inhibitors , Tumor Necrosis Factor-alpha/antagonists & inhibitors , Rats, Sprague-Dawley , Oxidative Stress/drug effects , Disease Models, Animal , Malondialdehyde/antagonists & inhibitors
3.
Rev. Paul. Pediatr. (Ed. Port., Online) ; 39: e2019295, 2021. tab, graf
Article in English, Portuguese | LILACS, SES-SP | ID: biblio-1143846

ABSTRACT

ABSTRACT Objective: To assess vitamin E intake and its relationship with sociodemographic variables, and to identify the main dietary sources of the nutrient in the diet of adolescents. Methods: This is a population-based cross-sectional study that used data from 891 adolescents living in Campinas, SP, participating in ISACamp 2014/15 (Health Survey) and ISACamp-Nutri 2015/16 (Food Consumption and Nutritional Status Survey). The nutrient intake averages were estimated using the Generalized Linear Model, adjusted for the total energy of the diet. Dietary sources of vitamin E were identified from the calculation of the relative contribution. Results: The average vitamin E intake was 3.2 mg for adolescents aged 10 to 13 years and 3.5 mg for those aged 14 to 19 years, results far below the recommended values of 9 and 12 mg, respectively. The prevalence of inadequacy was 92.5%. ­Ten ­foods/­food groups represented 85.7% of vitamin E present in the adolescents' diet; the vegetable oils group accounted for more than a quarter of the contribution (25.5%), followed by cookies (9.1%) and beans (8.9%). Conclusions: There were a low intake and a high prevalence of inadequate vitamin E intake among adolescents in Campinas, with vegetable oil as the main source. For the total number of adolescents, almost 33% of the nutrient content was derived from foods of poor nutritional quality such as cookies, packaged snacks, and margarine. The results of this study can guide public health actions that aim to improve the quality of adolescents' diets.


RESUMO Objetivo: Avaliar a ingestão de vitamina E e sua relação com variáveis sociodemográficas, e identificar as principais fontes alimentares do nutriente na dieta de adolescentes. Métodos: Trata-se de estudo transversal de base populacional que utilizou dados de 891 adolescentes residentes em Campinas, SP, participantes do ISACamp 2014/15 (Inquérito de Saúde) e ISACamp-Nutri 2015/16 (Inquérito de Consumo Alimentar e Estado Nutricional). As médias de ingestão do nutriente foram estimadas por meio de modelo linear generalizado, ajustado pela energia total da dieta. As fontes alimentares de vitamina E foram identificadas pelo cálculo de contribuição relativa. Resultados: A ingestão média de vitamina E foi de 3,2 mg para os adolescentes de 10 a 13 anos e de 3,5 mg para os de 14 a 19 anos, resultados bem inferiores aos valores recomendados de 9 e 12 mg, respectivamente. A prevalência de inadequação foi de 92,5%. Dez alimentos/grupos alimentares representaram 85,7% da vitamina E presente na dieta dos adolescentes; o grupo dos óleos vegetais totalizou mais de um quarto da contribuição (25,5%), seguido dos biscoitos (9,1%) e dos feijões (8,9%). Conclusões: Observou-se baixa ingestão e elevada prevalência de inadequação do consumo de vitamina E nos adolescentes de Campinas, apontando o óleo vegetal como principal fonte. Para o total de adolescentes, quase 33% do teor do nutriente derivava de alimentos de má qualidade nutricional como biscoitos, salgadinhos de pacote e margarina. Os resultados deste estudo podem direcionar ações de saúde pública que objetivem melhorar a qualidade da dieta dos adolescentes.


Subject(s)
Humans , Male , Female , Child , Adolescent , Vitamin E/analysis , Nutritional Status , Feeding Behavior , Vitamin E/administration & dosage , Brazil , Dietary Fats/administration & dosage , Nutrition Surveys , Cross-Sectional Studies , Diet, Western/adverse effects , Antioxidants/administration & dosage , Antioxidants/analysis , Nutritional Requirements
4.
Medicina (Ribeiräo Preto) ; 53(4)nov. 2020. tab
Article in English | LILACS | ID: biblio-1354849

ABSTRACT

ABSTRACT: Objective: Brazilian national data show a significant deficiency in pediatric vitamin E consumption, but there are very few studies evaluating laboratory-proven nutritional deficiency. The present study aimed to settle the prevalence of vitamin E deficiency (VED) and factors associated among school-aged children attended at a primary health unit in Ribeirão Preto (SP). Methods: A cross-sectional study that included 94 children between 6 and 11 years old. All sub-jects were submitted to vitamin E status analysis. To investigate the presence of factors associated with VED, socio-economic and anthropometric evaluation, determination of serum hemoglobin and zinc levels, and parasitological stool exam were performed. The associations were performed using Fisher's exact test. Results: VED (α-tocopherol concentrations <7 µmol/L) was observed in seven subjects (7.4%). None of them had zinc deficiency. Of the total of children, three (3.2%) were malnourished, 12 (12.7%) were anemic, and 11 (13.5%) presented some pathogenic intestinal parasite. These possible risk factors, in addition to maternal-work, maternal educational level, and monthly income, were not associated with VED. Conclusions: The prevalence of VED among school-aged children attended at a primary health unit was low. Zinc deficiency, malnutrition, anemia, pathogenic intestinal parasite, maternal-work, maternal educational level, and monthly income were not a risk factor for VED. (AU)


RESUMO: Objetivo: Determinar a prevalência da deficiência de vitamina E (DVE) e os fatores associados a essa deficiência em escolares atendidos em uma unidade básica de saúde de Ribeirão Preto (SP). Métodos: Estudo transversal que incluiu 94 crianças entre 6 e 11 anos de idade, atendidas em uma unidade básica de saúde. Todos os indivíduos foram submetidos à análise do status de vitamina E. Para investigar a presença de fatores associados à DVE, foi realizada avaliação socio-econômica e antropométrica, determinação dos níveis séricos de hemoglobina e zinco, e exame parasitológico de fezes. As associações foram realizadas por meio do teste exato de Fisher. Resultados: A DVE (concentrações de α-tocoferol <7 µmol/l) foi observada em sete indivíduos (7,4%). Nenhum sujeito apresentou deficiência sérica de zinco. Do total de crianças, três (3,2%) eram desnutridas, 12 (12,7%) anêmicas e 11 (13,5%) apresentavam algum parasita intestinal patogênico. Estes possíveis fatores de risco, além do trabalho materno, escolaridade materna e renda mensal, não foram associados à DVE (p>0,05). Conclusão: A prevalência de DVE em escolares atendidos em uma unidade básica de saúde foi baixa. Desnutrição, anemia, parasitose intestinal, renda mensal e trabalho e nível educacional maternos não se apre-sentaram como fatores de risco para a DVE. (AU)


Subject(s)
Humans , Male , Female , Child , Vitamin E , Vitamin E Deficiency , Prevalence , Cross-Sectional Studies , Risk Factors , Malnutrition , Zinc Deficiency
5.
Arq. bras. med. vet. zootec. (Online) ; 72(4): 1386-1390, July-Aug. 2020. tab, ilus
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1131498

ABSTRACT

A miopatia nutricional é uma doença degenerativa que pode afetar os músculos esqueléticos e cardíaco, causada pela deficiência dietética de selênio e/ou vitamina E. Objetivou-se relatar a ocorrência de miopatia nutricional em dois potros Puro Sangue Inglês, criados de forma extensiva, com baixa disponibilidade de forragem e sem suplementação mineral. De um lote de nove animais de diferentes idades (cinco éguas adultas, uma potra lactente de três meses,uma mula e dois potros de 16 e 17 meses), apenas os dois últimos foram afetados. Clinicamente, havia decúbito lateral ou esternal, taquicardia, taquipneia, desidratação e dor à palpação muscular na região dos glúteos.O diagnóstico presuntivo de miopatia nutricional foi realizado por meio da associação dos sinais clínicos aos dados epidemiológicos.O animal 1 foi eutanasiado cinco dias após o atendimento devido à piora gradativa do quadro, e o animal 2 recuperou-se com o tratamento adotado. O diagnóstico foi confirmado com base nos exames complementares, nos achados de necropsia e na dosagem da concentração hepática de selênio. Este relato de caso alerta para o risco da ocorrência de miopatia nutricional em equinos, sobretudo jovens, sem acesso a pastagens ou feno de boa qualidade e sem suplementação mineral adequada.(AU)


Nutritional myopathy is a degenerative disease caused by the dietary deficiency of selenium and/or vitamin E that can affect skeletal and cardiac muscles. The objective of this study was to report the occurrence of nutritional myopathy in two Thoroughbred young horses, raised in pastures with low forage availability and no mineral supplementation. From a herd of nine animals of different ages (five adult mares, one three-month-old nursing foal, one mule and two 16- and 17-month-old horses), only the last two were affected. Clinical signs were lateral or sternal recumbency, tachycardia, tachypnea, dehydration and muscle pain. Presumptive diagnosis of nutritional myopathy was made associating clinical signs and epidemiological data. Animal 1 was euthanized five days after the first evaluation due to clinical signs gets worse, and animal 2 recovered with the established treatment. Diagnosis was confirmed with complementary exams, necropsy findings and levels of hepatic selenium. This paper alerts to the risk of nutritional myopathy occurrence in horses, mainly young animals, which are not ingesting good quality hay or green forage and do not receive appropriate mineral supplementation.(AU)


Subject(s)
Animals , Selenium/deficiency , Vitamin E Deficiency/veterinary , Horses/growth & development , Muscular Diseases/veterinary
6.
Rev. colomb. cienc. pecu ; 33(2): 96-109, Apr.-June 2020. tab
Article in English | LILACS-Express | LILACS | ID: biblio-1289287

ABSTRACT

Abstract Background: Carcass and sheep meat quality are influenced by several factors, such as race, age, slaughter weight, type of diet, and dietary supplementation. Objective: To evaluate the effect of castration and vitamin E supplementation on performance, carcass characteristics and meat of lambs slaughtered at 45 kg. Methods: Thirty-two male lambs (16 castrated and 16 not castrated) were fed diets with or without the inclusion of vitamin E. The animals had an average age of 180 ± 20 days and a mean weight of 25.1 ± 4.6 kg. Performance was evaluated for 56 days, and the animals were slaughtered when reaching a weight of 45 kg. The experimental design was randomized blocks based on initial weights, and variables were assessed by a 2x2 factorial design (castrated and intact, supplemented or not with vitamin E, with a probability of 5%). Results: Higher proportion (p<0.05) of visceral fat was found in castrated animals (kidney: 2.45%, inguinal: 0.57% and omental: 4.96%) than in intact animals (kidney: 1.25%, inguinal 0.27%. and omental 3.12%). The aged meat samples showed no color differences for any of the treatments, but there were differences in shear force for steaks aged for 7 days, where the castrated animals showed an average of 2.64 kgf and intact animals showed an average 3.29 kgf. The animals supplemented with vitamin E had lower shear forces in non-aged samples. Conclusion: Castration increased deposition of visceral and fat coverage but did not influence the cut yields and total carcass yield. The animals supplemented with vitamin E had lower shear forces in non-aged samples.


Resumen Antecedentes: La calidad de la canal y de la carne de ovino puede ser influenciada por varios factores, como raza, edad, peso de sacrificio, tipo de dieta y suplementación. Objetivo: Evaluar el efecto de la castración y de la suplementación con vitamina E sobre el desempeño, la calidad de la canal y la carne de corderos Santa Inés sacrificados a los 45 kg de peso. Métodos: Fueron utilizados treinta y dos corderos: dieciséis castrados y dieciséis no castrados, alimentados con dietas con o sin inclusión de vitamina E. Los animales tenían una edad promedio de 180 ± 20 días y un peso promedio de 25,1 ± 4,6 kg. Fue evaluado el desempeño durante 56 días y, al llegar a los 45 kg de peso fueron sacrificados. El diseño experimental fue en bloques aleatorizados con base en el peso inicial, y las variables analizadas mediante un modelo factorial 2x2 (castrado o no castrado y suplementado o no con vitamina E, con una probabilidad del 5%). Resultado: Se encontró mayor proporción (p<0,05) de grasa visceral en los animales castrados (renal: 2,45%; inguinal: 0,57% y mesentérica: 4,96%) que en los no castrados (renal: 1,25%; inguinal 0,27% y mesentérica: 3,12%). Las muestras de carne maduradas no presentaron diferencias de color entre tratamientos, sin embargo hubo diferencias en la fuerza de corte para las carnes maduradas por 7 días, donde los animales castrados presentaron una media de 2,64 kgf y los no castrados de 3,29 kgf. La carne de los animales suplementados con vitamina E tuvo menor fuerza de corte en las muestras no maduradas. Conclusión: La castración aumentó la deposición de grasa visceral y de cobertura pero no influenció las características de rendimiento total de la canal y cortes. Los animales suplementados con vitamina E tuvieron menor fuerza de corte en las muestras no maduradas.


Resumo Antecedentes: A qualidade da carcaça e da carne ovina pode ser influenciada por vários fatores como raça, idade, peso de abate tipo de dieta e suplementação. Objetivo: Avaliar o efeito da castração e da suplementação de vitamina E sobre o desempenho e qualidade de carcaça e carne de cordeiros Santa Inês abatidos a 45 kg de peso. Métodos: Foram utilizados trinta e dois cordeiros, dezesseis castrados e dezesseis não castrados alimentados com dietas com ou sem inclusão de vitamina E. Os animais tinham idade média de 180 ± 20 dias e peso médio de 25,1 ± 4,6 kg. Foi avaliado o desempenho durante 56 dias, e ao chegarem aos 45 kg foi realizado o abate. O delineamento experimental foi em blocos ao acaso, com base no peso inicial, e as variáveis analisadas por modelo fatorial 2x2 (castrado ou não castrado e suplementado ou não com vitamina E, ao nível de 5%). Resultado: Foi encontrada maior proporção (p<0,05) das gorduras viscerais nos animais castrados (renal: 2,45%; inguinal: 0,57% e omental: 4,96%) do que nos animais não castrados (renal: 1,25%; inguinal 0,27% e omental: 3,12%). As amostras maturadas não apresentaram diferenças de cor entre os tratamentos, no entanto houve diferenças na força de cisalhamento para as carnes maturadas por 7 dias, na qual os animais castrados apresentaram média de 2,64 kgf e os não castrados de 3,29 kgf. Os animais suplementados com vitamina E apresentaram menores forças de cisalhamento nas amostras não maturadas. Conclusão: A castração aumentou a deposição de gorduras viscerais e de cobertura, mas não influenciou as características de rendimento de carcaça e cortes. Os animais suplementados com vitamina E tiveram menor força de cisalhamento nas amostras não maturadas.

7.
Rev. chil. enferm. respir ; 36(2): 115-121, jun. 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1138543

ABSTRACT

Ha habido mucha discusión sobre los efectos dañinos para la salud producidos por los cigarrillos electrónicos o vapeadores y su utilidad como ayuda para dejar de fumar. Cada vez aparecen más publicaciones con efectos deletéreos sobre la salud. Esta discusión se ha acentuado en los últimos años, por el importante aumento del uso de los vapeadores en todo el mundo, especialmente entre los adolescentes y adultos jóvenes. En septiembre de 2019 el Centro de Control y Prevención de Enfermedades (CDC) de los EE. UU. alertó sobre un importante número de casos de enfermedad pulmonar asociada al uso de cigarrillo electrónico (EVALI: e-cigarette or vaping associated lung injury). Epidemiológicamente se consideró un brote que al 17 de enero, 2020 ha presentado 2.668 pacientes hospitalizados, con 57 fallecidos. Durante la semana del 15 de septiembre 2019 ocurrió el 'peak' de hospitalizaciones por EVALI. La mayoría eran varones jóvenes. El 82% usó productos con Tetrahidrocanabinoides (THC) y el 14% productos con nicotina. En el lavado bronquio-alveolar de 51 casos de EVALI se encontró la presencia de acetato de Vitamina E, producto utilizado como espesante para la elaboración de productos de 'vapeo' que contienen THC, lo que lo hace un posible factor causal, pero no se puede descartar el papel de otros compuestos tóxicos. Las principales sociedades científicas del mundo y la OMS han advertido de los riesgos a largo plazo del uso de los cigarrillos electrónicos y recomiendan su control y regulación.


There has been a lot of discussion about the harmful health effects caused by electronic cigarettes or vapers and their usefulness as a smoking cessation aid. More and more publications appear with deleterious effects on health. This discussion has been straightened in recent years, due to the significant increase in the use of vapers worldwide, especially among adolescents and young adults. In September 2019, the US Center for Disease Control and Prevention warned of a significant number of cases of lung disease associated with the use of electronic cigarettes (EVALI: e-cigarette or vaping associated lung injury). Epidemiologically it was considered an outbreak that as of January 17, 2020 presented 2668 hospitalized patients, with 57 deaths. During the week of September 15, 2019 the peak of hospitalizations for EVALI occurred. The majority were young men. 82% of them used products with Tetrahydrocanabinoids (THC) and 14% products with nicotine. In the bronchoalveolar lavage of 51 cases of EVALI, the presence of Vitamin E acetate was found, a product used as a thickener for the elaboration of vaping products containing THC, which makes it a possible causal factor, but it cannot be ruled out the contribution of other toxic compounds. The world's leading scientific societies and World Health Organization have warned of the long-term risks of using electronic cigarettes and recommend their control and regulation.


Subject(s)
Humans , Lung Injury/etiology , Electronic Nicotine Delivery Systems , Vaping/adverse effects , Dronabinol , Vitamin E/analysis , Bronchoalveolar Lavage Fluid/chemistry , Lung Injury/pathology , Lung Injury/epidemiology , Lung Injury/diagnostic imaging
8.
Int. j. morphol ; 38(2): 278-288, abr. 2020. graf
Article in English | LILACS | ID: biblio-1056435

ABSTRACT

This experiment was designed to study the effects of oral administration of artemether which is the most rapid-acting class of antimalarial drugs and the possible protective effect of vitamin E taken with it on the liver of albino rats. A total of twenty-four adult male albino rats were used in this study and were divided into four groups. Group one served as a control and rats in group two exposed to oral intake of artemether daily for fifteen days. The third and fourth groups treated with artemether plus low and high doses of vitamin E respectively. At the end of the experiment, the rats were sacrificed, and the livers were obtained and processed for histological, biochemical and statistical studies. Histological study of the hepatocytes of rats exposed to artemether showed nearly complete disintegration of most cellular contents except few numbers of mitochondria and rough endoplasmic reticulum. Also, the cytoplasm of these cells had few lysosomes, many vacuoles and irregular nuclei with abnormal distribution of chromatin and were shown. The hepatic sinusoids were dilated and filled with blood and vacuoles and bile ductules were abnormal in its structure. Treatment with low and high doses of vitamin E in concomitant with artemether ameliorated the hepatic histopathological lesions and its parenchyma attained nearly normal structure. As far as biochemical changes, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in rats treated with artemether were significantly elevated as compared to the control. Superoxide dismutase (SOD) and malondialdehyde (MDA) levels were significantly increased in the liver in rats treated with artemether. However, vitamin E ameliorated the rise in ALT and AST with decreased MDA concentration and levels of SOD as compared to the corresponding artemether group values. Results of the present suggest that artemether has a harmful and stressful effect on hepatic tissue and the treatment with vitamin E may alleviate this toxicity.


Este experimento fue diseñado para estudiar los efectos de la administración oral de arteméter, la clase de medicamentos antipalúdicos de acción rápida, y el posible efecto protector de la vitamina E en el hígado de ratas albinas. Se utilizaron un total de 24 ratas albinas machos adultas y se dividieron en cuatro grupos. El grupo uno sirvió como control y las ratas en el grupo dos recibieron la dosis oral de arteméter diariamente durante 15 días. Los grupos tres y cuatro fueron tratados con arteméter, más dosis bajas y altas de vitamina E, respectivamente. Al final del experimento, se sacrificaron las ratas y se obtuvieron y procesaron los hígados para estudios histológicos, bioquímicos y estadísticos. El estudio histológico de los hepatocitos de ratas expuestas a arteméter mostró una desintegración casi completa de la mayoría de los contenidos celulares, excepto algunos mitocondrias y retículo endoplásmico rugoso. Además, el citoplasma de estas células tenía pocos lisosomas, muchas vacuolas y núcleos irregulares con distribución anormal de cromatina. Los sinusoides hepáticos estaban dilatados y llenos de sangre y vacuolas, y los conductos biliares tenían una estructura anormal. El tratamiento con dosis bajas y altas de vitamina E en forma concomitante con arteméter mejoró las lesiones histopatológicas hepáticas y su parénquima alcanzó una estructura casi normal. En cuanto a los cambios bioquímicos, la alanina aminotransferasa (ALT) y la aspartato aminotransferasa (AST) en ratas tratadas con arteméter se elevaron significativamente en comparación con el control. Los niveles de superóxido dismutasa (SOD) y malondialdehído (MDA) aumentaron significativamente en el hígado en ratas tratadas con arteméter. Sin embargo, la vitamina E mejoró el aumento de ALT y AST con una disminución de la concentración de MDA y los niveles de SOD en comparación con los valores correspondientes del grupo de arteméter. Los resultados del presente estudio sugieren que el arteméter tiene un efecto dañino y estresante sobre el tejido hepático y el tratamiento con vitamina E puede aliviar esta toxicidad.


Subject(s)
Animals , Male , Rats , Vitamin E/pharmacology , Artemisinins/toxicity , Chemical and Drug Induced Liver Injury, Chronic/enzymology , Aspartate Aminotransferases/analysis , Vitamin E/administration & dosage , Microscopy, Electron, Transmission , Alanine Transaminase/analysis , Disease Models, Animal , Liver/drug effects , Antimalarials/toxicity
9.
Int. j. morphol ; 38(2): 461-471, abr. 2020. graf
Article in English | LILACS | ID: biblio-1056463

ABSTRACT

This experiment was designed to study the administration of normal doses of one of recent antimalarial drug and coadministration of vitamin E on the kidney tissue. A total twenty-four adult male albino rats were used and divided into four groups: the first one served as a control, the second received artemether orally for three days consecutively. The rats of the third and fourth groups received the same dose of artemether concomitantly with 50 and 100 mg/kg vitamin E orally daily for 2 weeks. After the last dose, the rats were sacrificed and the kidney tissues with blood samples obtained and processed for light, electron microscopic and biochemical analysis. Histologically, artemether treated kidneys showed atrophied glomeruli with widened urinary space and kidney tubules were degenerated with disturbed contour and some vacuoles inside it. Ultrastructurally, the glomeruli of this group showed hypertrophic endothelial cells, irregularity of its basement membrane, disrupted foot processes and filtration slits. The kidney tubule cells showed loss of basal infoldings, cytoplasmic vacuolation, polymorphic damaged swollen mitochondria a loss of its microvilli towards its capillary lumen. Artemether plus vitamin E of the rat kidney groups showed improvement of morphological changes compared to the changes seen in artemether alone. These data were confirmed by biochemical findings with marked improvement of blood urea and creatinine levels and increase of anti-oxidant enzyme activities of glutathione peroxidase and superoxide dismutase in the vitamin E treated groups. The results of this study revealed that vitamins E can improve the adverse changes of artemether of rat renal tissue.


Este proyecto fue diseñado para estudiar la administración de dosis normales de uno de los medicamentos antipalúdicos y de la administración de vitamina E en el tejido renal. Se utilizaron 24 ratas albinas machos adultas divididas en cuatro grupos: el primero sirvió como control, el segundo recibió arteméter por vía oral durante tres días consecutivos. Las ratas del tercer y cuarto grupos recibieron la misma dosis de arteméter concomitantemente con 50 y 100 mg / kg de vitamina E por vía oral diariamente durante 2 semanas. Después de la última dosis, las ratas fueron sacrificadas y se obtuvo el tejido renal de cada muestra los cuales fueron procesados para análisis con microscopías de luz y electrónica, además de exámenes bioquímicos. Histológicamente, los riñones tratados con arteméter mostraron atrofia glomerular con espacio urinario ensanchado y túbulos renales degenerados con contorno alterado y algunas vacuolas en su interior. Ultraestructuralmente, los glomérulos de este grupo mostraron células endoteliales hipertróficas, irregularidad de su membrana basal, procesos alterados del pie y hendiduras de filtración. Las células del túbulo renal mostraron pérdida de inflexiones basales, vacuolación citoplasmática, mitocondrias dañadas y pérdida de sus microvellosidades hacia la luz capilar. Arteméter más vitamina E en los grupos de riñón de rata mostraron una mejora de los cambios morfológicos, en comparación con los cambios observados en arteméter solamente. Estos datos fueron confirmados por hallazgos bioquímicos con una marcada mejoría de los niveles de urea y creatinina en sangre y un aumento de las actividades enzimáticas antioxidantes de la glutatión peroxidasa y la superóxido dismutasa en los grupos tratados con vitamina E. Los resultados de este estudio revelaron que la vitamina E puede mejorar los cambios adversos del arteméter del tejido renal de la rata.


Subject(s)
Animals , Male , Rats , Vitamin E/pharmacology , Acute Kidney Injury/chemically induced , Artemether/toxicity , Vitamin E/administration & dosage , Microscopy, Electron , Biomarkers/analysis , Rats, Wistar , Kidney/drug effects , Kidney/pathology , Kidney/ultrastructure , Antimalarials/toxicity
10.
Int. j. odontostomatol. (Print) ; 13(4): 402-410, dic. 2019. graf
Article in Spanish | LILACS | ID: biblio-1056476

ABSTRACT

RESUMEN: Los bisfosfonatos (BP) disminuyen la resorción ósea al frenar la actividad de los osteoclastos. La vitamina E es antioxidante y su efecto positivo en el hueso sería mediante la prevención del estrés oxidativo. Se estudió la administración infiltrativa de Alendronato y Vitamina E para determinar si favorecían la formación de hueso en la reparación ósea del alvéolo postexodoncia. Se utilizaron ratas machos Wistar (n=96), de 90 ± 15 g, se les realizó la exodoncia de los primeros molares inferiores. Fueron dividos en 4 grupos: Un grupo control (C) recibió solución salina. El grupo AL 0,5 mg/ Kg; grupo E recibió 20 mg/kg; y grupo con tratamiento combinado AL y E. Los animales se sacrificaron a los 0, 7, 15 y 30 días postextracción. Se realizó la resección de las mandíbulas; las muestras fueron descalcificadas con EDTA y luego se incluyeron en parafina. Se realizaron cortes histológicos y se colorearon con Hematoxilina/Eosina. Se realizó análisis histológico e histomorfométrico. Se utilizó análisis de Varianza (ANOVA). En el análisis histológico, a los 7 y 15 días el grupo E presentó mayor neoformación de tejido óseo que los otros grupos. A los 30 días se observó hueso maduro con presencia de osteonas en el grupo E. En el estudio histomorfométrico a los 15 y 30 días se evidencian diferencias significativas en el número de osteoblastos por mm lineal, entre el grupo AL + E y C (p<0,01) y a los 30 días se encontró diferencia entre el grupo E y C (p<0,01). Al medir espesor trabecular se observó a los 30 días diferencias significativas entre el grupo AL+E y C (p<0,01) y entre el grupo C y E (p<0,01). La Vitamina E demostró que administrada por vía infiltrativa favorece la remodelación ósea en los alvéolos post exodoncia.


ABSTRACT: Bisphosphonates (BP) decrease bone resorption to curb the activity of the osteoclasts. Vitamin E is an antioxidant and its positive effect on the bone would be by preventing oxidative stress. Infiltrative Alendronate and vitamin E administration wasstudied to determine if they favored the formation of bone in bone repair of the postextraction alveolus. Male Wistar rats were used (n = 96), 90 ± 15 g, underwent extraction of the lower first molars. They were divided into 4 groups: A control group (C) received saline. The Group at the 0.5 mg/Kg; Group E received 20 mg/kg; and combined treatment group to AL and E. The animals were sacrificed at days 0, 7, 15 and 30 post extraction. With the resection of the jaws; samples were decalcified with EDTA and then included in paraffin. Histological cuts were made and colored with Hematoxylin/ eosin. Histomorphometric and histological analysis was performed. We used analysis of variance (ANOVA). In the histological analysis, 7 to 15 days the Group E presented greater neoformation of bone tissue than other groups. At 30 days mature bone was observed, with presence of osteons in the Group E. Study shows significant differences in the number of osteoblast histomorphometric function to 15 to 30 days by linear mm, among the group to the + E and C (p < 0.01) and 30-day difference was found among the Group E and C (p < 0.01). When measuring thick trabecular, significant differences were observed at 30 days between the AL+E and C Group (p < 0.01) and between C and E (p < 0.01). Vitamin E showed that administered infiltrative favors the bone remodeling in post extraction sockets.


Subject(s)
Animals , Male , Rats , Osteogenesis/physiology , Vitamin E/therapeutic use , Alendronate/administration & dosage , Osteoblasts , Vitamin E/administration & dosage , Intervention Studies , Analysis of Variance , Histological Techniques , Rats, Wistar , Cancellous Bone
11.
Int. j. morphol ; 37(4): 1335-1341, Dec. 2019. graf
Article in English | LILACS | ID: biblio-1040134

ABSTRACT

Food additives and flavour enhancers used in the food industry are potential health risks. We tested the hypothesis that the food additive and flavour enhancer, monosodium glutamate (MSG), which is the sodium salt of glutamic acid can induce ultrastructural alterations to the kidney, and the antioxidant vitamin E can protect against acute kidney injuries induced by a toxic dose of MSG in a rat model of the disease. The model group of rats received a daily dose of MSG (4 gm/kg) for 7 days, whereas the protective groups were either received a 100 mg/kg vitamin E plus MSG or 300 mg/kg vitamin E plus MSG for 7 days. Rats were then sacrificed on day 8. Transmission and light microscopy images revealed substantial kidney damage induced by MSG in the model group as demonstrated by degenerated epithelial cells with Pyknotic nuclei, swollen mitochondria, damaged brush margins, dilated tubules, and widening of Bowman's space with shrinkage and deformity of some glomeruli. Treatment of the model group with vitamin E showed a substantial protection of kidney tissue and renal ultrastructure by 300 mg/kg vitamin E compared to a partial protection by 100 mg/kg vitamin E. In addition, MSG significantly (p<0.05) increased serum levels of urea and creatinine, which were significantly (p<0.05) decreased with vitamin E. However, for serum creatinine, high doses of vitamin E (300 mg/kg) were more effective than lower doses (100 mg/kg) of vitamin E. These results indicate that vitamin E at 300 mg/kg effectively protects against MSG-induced acute kidney injury in rats.


Los aditivos alimentarios y los potenciadores del sabor utilizados en la industria alimentaria son riesgos potenciales para la salud. Probamos la hipótesis de que el aditivo alimentario y el potenciador del sabor, glutamato monosódico (MSG), la sal sódica del ácido glutámico, puede inducir alteraciones ultraestructurales del riñón, y que las propiedades antioxidantes de la vitamina E, pueden proteger contra las lesiones renales inducidas por una dosis tóxica de MSG en un modelo de rata. El grupo modelo de ratas recibió una dosis diaria de MSG (4 g / kg) durante 7 días, mientras que los grupos protectores recibieron una dosis de 100 mg / kg de vitamina E más MSG o 300 mg / kg de vitamina E más MSG durante 7 días. Las ratas se sacrificaron el día 8. Las imágenes de microscopía óptica y de transmisión revelaron un daño renal sustancial inducido por el MSG en el grupo modelo, como lo demuestran las células epiteliales degeneradas con núcleos picnóticos, mitocondrias hinchadas, bordes dañados, túbulos dilatados y ensanchamiento del espacio de Bowman, además de la deformidad de algunos glomérulos. El tratamiento del grupo modelo con vitamina E mostró una protección sustancial del tejido renal y la ultraestructura renal de 300 mg / kg de vitamina E en comparación con una protección parcial de 100 mg / kg de vitamina E. Además, el MSG aumentó significativamente (p <0,05) en el suero los niveles de urea y creatinina, disminuyeron significativamente (p <0,05) con la vitamina E. Sin embargo, para la creatinina sérica, las dosis altas de vitamina E (300 mg / kg) fueron más efectivas que las dosis más bajas (100 mg / kg) de vitamina E. Estos resultados indican que la vitamina E a 300 mg / kg protege eficazmente contra la lesión renal aguda inducida por MSG en ratas.


Subject(s)
Animals , Rats , Sodium Glutamate/toxicity , Vitamin E/therapeutic use , Acute Kidney Injury/drug therapy , Vitamin E/pharmacology , Rats, Sprague-Dawley , Microscopy, Electron, Transmission , Disease Models, Animal , Acute Kidney Injury/chemically induced , Acute Kidney Injury/pathology , Kidney/pathology , Kidney/ultrastructure
12.
Rev. colomb. gastroenterol ; 34(3): 237-243, jul.-set. 2019. tab, graf
Article in Spanish | LILACS | ID: biblio-1042810

ABSTRACT

Resumen Introducción y objetivos: la terapia con vitaminas C y E ha sido propuesta como adyuvante a la terapia triple estándar (TTE) con el fin de incrementar la tasa de erradicación del Helicobacter pylori (H. pylori). En este estudio probamos esta hipótesis en una cohorte de pacientes de la Amazonía peruana. Materiales y métodos: retrospectivamente, evaluamos una cohorte de 50 pacientes infectados con H. pylori del Hospital de Tarapoto en el período comprendido entre julio-diciembre de 2016; de estos, 25 fueron tratados con TTE (amoxicilina 1 g, claritromicina 500 mg y omeprazol 20 mg, dos veces al día por 14 días) en adyuvancia con las vitaminas C y E, y 25 fueron tomados al azar (1:1), quienes solo recibieron TTE. Se estimó y comparó la efectividad de ambos tratamientos utilizando un modelo regresión general lineal con familia Poisson y link log, teniendo como desenlace de interés la erradicación del H. pylori confirmada por histopatología. Resultados: al comparar la cohorte de expuestos y con los no expuestos, no se encontraron diferencias significativas en sus características basales, incluyendo edad (38 ± 11 frente a 36 ± 10 años), género masculino (65 % frente a 63 %), síntomas y diagnóstico histopatológico. Al comparar la efectividad de ambos tratamientos, se encontró un incrementó no significativo en las tasas de erradicación del 9,5 % (91 % frente a 82 %, razón de tasas de incidencia = 1,11; intervalo de confianza [IC] 95 %: 0,92 a 1,36). Conclusiones: la terapia adyuvante con vitaminas C y E podría ayudar a incrementar la efectividad de la TTE para H. pylori en pacientes de la Amazonía peruana, aunque se requiere confirmar esta hipótesis en un ensayo clínico.


Abstract Introduction and Objectives: Adjuvant therapy with vitamins C and E has been proposed to increase standard triple therapy's Helicobacter pylori eradication rate. This study tested this hypothesis in a cohort of patients from the Peruvian Amazon. Material and Methods: We retrospectively evaluated a cohort of 50 patients at Tarapoto Hospital who were treated for H. pylori infections from July to December 2016. Of these, 25 were randomly selected to receive standard triple therapy of 1 g amoxicillin, 500mg clarithromycin and 20mg omeprazole twice a day for 14 days plus adjuvant vitamins C and E. The other 25 only received standard triple therapy. The effectiveness of both treatments was estimated and compared using a general linear regression model using the Poisson family of distributions and log link with H. pylori eradication confirmed by histopathology as the outcome of interest. Results: A comparison of the two groups found no significant differences in their baseline symptoms, histopathological diagnoses, ages (38 ± 11 years vs. 36 ± 10 years) or genders (65% male vs. 63% male). A comparison of the effectiveness both treatments found a non-significant increase in eradication rates of 9.5% (91% vs. 82%, incidence rate ratio = 1.11; 95% confidence interval: 0.92 to 1.36). Conclusions: Adjuvant therapy with vitamins C and E may help increase the effectiveness of standard triple therapy for H. pylori in patients in the Peruvian Amazon, although this hypothesis needs to be confirmed in a clinical trial.


Subject(s)
Humans , Therapeutics , Vitamins , Effectiveness , Helicobacter pylori , Patients , Amazonian Ecosystem , Diagnosis
13.
Perspect. nutr. hum ; 21(2): [219-227], septiembre 12 de 2019.
Article in Spanish | LILACS | ID: biblio-1103629

ABSTRACT

Antecedentes: actualmente existe un creciente interés en investigar métodos que logren disminuir el dolor muscular de inicio retardado. Se ha postulado que antioxidantes como las vitaminas C y E pueden atenuarlo. Objetivo: evaluar la efectividad de vitamina E en la atenuación del dolor muscular de inicio retardado. Materiales y métodos: se realizó una búsqueda bibliográfica en las bases de datos Medline, Registro Central Cochrane, Scopus, SportDiscus y SciELO, utilizando los términos: "vitamin e supplementation", "muscle damage" y "delayed onset muscle soreness". Resultados: se revisaron estudios en diversos grupos poblacionales, con diferentes métodos de evaluación y diversas dosis de vitamina E. Los resultados obtenidos fueron controversiales, en algunos casos se demostró un efecto atenuante del dolor muscular de inicio retardado y en otros casos no. Conclusiones: la vitamina E produce una disminución del estrés oxidativo y estabilización el sarcolema; no obstante, faltan pruebas concluyentes para afirmar que la vitamina E tenga el efecto de generar mejoras en los biomarcadores asociados al dolor muscular de inicio retardado.


Background: Currently, there is a growing interest in investigating methods that reduce delayed onset muscle pain. It has been postulated that antioxidants such as vitamin C and E can attenuate it. Objective: To evaluate the effectiveness of vitamin E in mitigating delayed onset muscle pain. Materials and Methods: A bibliographic search was carried out in the following databases: Medline, Registry Central Cochrane, Scopus, SportDiscus and SciELO, using the terms: "vitamin e supplementation", "muscle damage" and "delayed onset muscle soreness". Results: Studies in diverse population groups were reviewed, with various evaluation methods and differing doses of vitamin E. The results were very controversial, in some cases a delayed onset pain effect was demonstrated and in other cases not. Conclusion: Vitamin E produces a decrease in oxidative stress and stabilization of sarcolemma, however, conclusive evidence is lacking to state that vitamin E will have the effect of generating improvements in biomarkers associated with delayed onset muscle pain.


Subject(s)
Mediation Analysis
14.
Int. j. odontostomatol. (Print) ; 13(2): 137-141, jun. 2019. graf
Article in Spanish | LILACS | ID: biblio-1002296

ABSTRACT

RESUMEN: El balance óseo está mediado por una regulación inmunoendócrina, siendo éste un complejo proceso. Entre las acciones llevadas a cabo para mantener la densidad y estructura del esqueleto son variadas las farmacoterapias utilizadas. Diversos estudios han demostrado que tanto Alendronato (AL) y Vitamina E (E) contribuyen a la inhibición de la reabsorción ósea. El objectivo de este trabajo fue estudiar el efecto de la administración combinada de (AL) por vía subcutánea y (E) se administró tres veces por semana también por vía subcutánea con una dosificación de 20 mg/kg de peso corporal. La fórmula farmacéutica fue de 0,5 mg/kg de peso corporal para AL, y 20 mg/kg de vitamina E. El efecto se evaluó en ratas machos Wistar (n=108), de 90 ± 20 g, divididas en 4 grupos. Se realizó la exodoncia de los primeros molares inferiores. La droga se inyectó en forma subcutánea en tiempos 0, 7, 15 y 30 días post cirugía. Las imágenes de las mandíbulas fueron adquiridas mediante radiovisiógrafo, en cada tiempo experimental y fueron analizadas con el Software Image ProPlus versión 4,1 de Media Cibernetics. Estudios estadísticos: no paramétrico: prueba de Kruskal-Wallis Resultados: El grupo C (que registró la media de intensidad más baja), se diferenció significativamente de los grupos E y A-E (p<0,001), no así del grupo que utilizó únicamente Al (p=0,070; p>0,05). Los grupos Al, E y el combinado Al-E no se diferenciaron significativamente entre sí (p>0,05 en todos los casos). Los datos evaluados sirven para mostrar una tendencia favorable en relación al efecto beneficioso de la combinación de AL y vitamina E.


ABSTRACT: The bone balance is mediated by an immunoendocrine regulation, this being a complex process. A number of pharmacotherapies are used among the actions taken to maintain the density and structure of the skeleton. Several studies have shown that both Alendronate (AL) and Vitamin E (E) contribute to the inhibition of bone resorption. Objective: To study the effect of combined administration of (LA) subcutaneously and (E) was administered three times per week also subcutaneously with a dosage of 20 mg / kg body weight. The pharmaceutical formulation was 0.5 mg / kg body weight for AL and 20 mg / kg vitamin E. The effect was evaluated in male Wistar rats (n = 108), 90 ± 20 g, divided into 4 groups. Extraction of the first lower molars was performed. The drug was injected subcutaneously at time 0, 7, 15 and 30 days post-surgery. The images of the jaws were acquired by radiovisiography, at each experimental time and were analyzed with Image ProPlus Software version 4.1 of Media Cibernetics. Statistical studies: non-parametric: Kruskal-Wallis test Group C (which recorded the lowest mean intensity) was significantly different from the E and AE groups (p <0.001), but not from the group that used only Al (P = 0.070, p> 0.05). The Al, E and combined Al-E groups did not differ significantly from each other (p> 0.05 in all cases). The data evaluated serve to show a favorable trend in relation to the beneficial effect of the combination of AL and vitamin E.


Subject(s)
Animals , Rats , Vitamin E/administration & dosage , Bone Remodeling/drug effects , Alendronate/administration & dosage , Radiography, Dental , Analysis of Variance , Animal Experimentation , Diphosphonates/administration & dosage
15.
J. pediatr. (Rio J.) ; 95(2): 224-230, Mar.-Apr. 2019. tab
Article in English | LILACS | ID: biblio-1002461

ABSTRACT

Abstract Objective: The purpose of this study was to evaluate the antioxidant status of plasma vitamin E and plasma and intracellular coenzyme Q10 in children with type 1 diabetes. Method: This case-control study was conducted on 72 children with type 1 diabetes and compared to 48 healthy children, who were age, sex, and ethnicity-matched. The diabetic children were divided according to their glycosylated hemoglobin (A1c %) into two groups: poor and good glycemic control groups. All children underwent full history taking, clinical examination, and laboratory measurement of complete blood count, A1c %, plasma cholesterol, triglycerides, and vitamin E levels and coenzyme Q10 levels in plasma, erythrocytes, and platelets. Results: Children with poor glycemic control showed significantly higher plasma vitamin E, coenzyme Q10, triglycerides, low-density lipoproteins, waist circumference/height ratio, cholesterol levels, and lower high-density lipoproteins and platelet coenzyme Q10 redox status in comparison to those with good glycemic control and the control group (p < 0.05). Plasma coenzyme Q10 showed a positive correlation with the duration of type 1 diabetes, triglycerides, cholesterol, vitamin E, and A1c %, and negative correlation with the age of the diabetic group (p < 0.05). The platelet redox status showed a negative correlation with the A1c % levels (r = −0.31; p = 0.022) and the duration of type 1 diabetes (r = −0.35, p = 0.012). Conclusion: Patients with type 1 diabetes, especially poorly controlled, had elevation of plasma vitamin E and coenzyme Q10 levels and decreased platelet redox status of coenzyme Q10, which may be an indicator of increased oxidative stress.


Resumo Objetivo: Avaliar o estado antioxidante da vitamina E no plasma e da coenzima Q10 no plasma e intracelular em crianças com diabetes tipo 1. Método: Este estudo caso-controle realizado em com 72 crianças com diabetes tipo 1 comparadas por idade, sexo e etnia de 58 crianças saudáveis. As crianças diabéticas foram divididas em dois grupos de acordo com sua hemoglobina glicosilada (A1c %): grupos de controle glicêmico bom e baixo. Todas as crianças foram submetidas a anamnese total, exame clínico e laboratorial para hemograma completo, A1c %, colesterol no plasma, triglicerídeos e níveis de vitamina E e níveis de coenzima Q10 no plasma, eritrócitos e plaquetas. Resultados: As crianças com baixo controle glicêmico mostraram nível de vitamina E no plasma significativamente maior, coenzima Q10, triglicerídeos, lipoproteína de baixa densidade, proporção da circunferência da cintura/estatura e níveis de colesterol e menor nível de lipoproteína de alta densidade e estado redox da coenzima Q10 em comparação aos com bom controle glicêmico e com o grupo de controle (p < 0,05). A coenzima Q10 no plasma mostrou correlação positiva com a duração da diabetes tipo 1, triglicerídeos, colesterol, vitamina E e A1c % e correlação negativa com a idade do grupo diabético (p < 0,05). O estado redox das plaquetas mostrou correlação negativa com os níveis de A1c % (r = -0,31; p = 0,022) e a duração da diabetes tipo 1 (r = -0,35, p = 0,012). Conclusão: Os pacientes com diabetes tipo 1, principalmente mal controlados, apresentaram aumento nos níveis de vitamina E no plasma e coenzima Q10 e redução no estado redox das plaquetas da coenzima Q10 que podem indicar aumento do estresse oxidativo.


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Vitamin E/blood , Ubiquinone/analogs & derivatives , Diabetes Mellitus, Type 1/blood , Oxidation-Reduction , Biomarkers/blood , Case-Control Studies , Ubiquinone/blood , Oxidative Stress
16.
Prensa méd. argent ; 105(1): 9-16, mar 2019. fig
Article in Spanish | LILACS, BINACIS | ID: biblio-1026314

ABSTRACT

El granuloma anular (GA) es una dermatosis inflamatoria granulomatosa, generalmente asintomática, con distintas formas de presentación clínica, que puede distribuirse de forma localizada o generalizada. su etiología es incierta pero se la ha vinculado a factores desencadenantes como traumatismos, fármacos, diabetes mellitus, tiroideopatías, neoplasias, infecciones virales (herpes simple y varicela zóster) y excepcionalmente puede aparecer en la misma localización donde previamente aconteció otra enfermedad con la cual no guarda relación alguna (fenómeno isotópico de Wolf). En su patogenia intervendrían mecanismos de hipersensibilidad retardada y de estrés oxidativo celular. Existen múltiples terapias con respuesta variable y se ha observado autorresolución en casi el 75% de los casos. Presentamos el caso de una mujer de 64 años de edad, hipotiroidea de larga data, con un granuloma anular generalizado que apareció sobre cicatrices residuales de un herpes zóster (fenómeno isotópico de Wolf) y su respuesta al tratamiento con Vitamina E por vía oral


Granuloma annulare (GA) is a granulomatous inflammatory dermatosis, usually asymptomatic, with different forms of clinical presentation, which can be localized or generalized. Its etiology is uncertain but has been linked to triggers such as trauma, drugs, diabetes mellitus, thyroid disease, neoplasms and viral infections (herpes simplex, varicella-zoster). Exceptionally, it may appear in the same location where another disease has previously occurred but with no relationship to it (Wolf isotopic response). In their pathogenesis, delayed hypersensitivity mechanisms and cellular oxidative stress would intervene. There are multiple therapies with variable response, and autorresolution has been observed in almost 75% of the cases. We present the case of a 64-year-old woman with a long history of hypothyroidism, with diagnosis of generalized granuloma annulare on residual scars of Herpes Zoster (Wolf 's isotopic response) and its response to oral Vitamin E.


Subject(s)
Humans , Female , Middle Aged , Vitamin E/therapeutic use , Granuloma Annulare/therapy , Oxidative Stress , Herpes Simplex/diagnosis
17.
São Paulo; s.n; 2019. 245 p
Thesis in Portuguese | LILACS, BDENF | ID: biblio-1396601

ABSTRACT

Introdução: Apesar da ação promissora dos agentes antioxidantes contra as radiodermatites, os estudos sobre esse tema ainda são pouco consistentes. Diante dessas considerações, questionou-se sobre a ação da vitamina E, veiculada por meio de nanotecnologia, na prevenção das radiodermatites. Objetivo: Avaliar o potencial efeito da aplicação tópica de creme com nanopartículas lipídicas contendo vitamina E, na concentração final de 2%, para a prevenção de radiodermatite aguda em mulheres com câncer de mama submetidas à teleterapia. Método: Estudo piloto randomizado e duplo cego, realizado em um hospital oncológico de Minas Gerais. A amostra foi constituída de 40 mulheres, divididas em três grupos: Intervenção - realizaram a aplicação tópica de creme com nanopartículas lipídicas contendo vitamina E; Controle 1 - realizaram a aplicação tópica de creme sem nanopartículas lipídicas e sem vitamina E; Controle 2 - realizaram a aplicação tópica de creme com nanopartículas lipídicas sem vitamina E. A incidência de radiodermatite, o grau (pelas escalas RTOG e CTCAE) e o tempo para o aparecimento da reação foram considerados desfechos primários; a qualidade de vida, a temperatura da mama e os sintomas relatados como desfechos secundários. Todas as participantes seguiram as orientações padrão para prevenção de radiodermatites, realizaram a aplicação de creme três vezes por dia e foram avaliadas três vezes por semana. Para a coleta dos dados, utilizaram-se quatro instrumentos: dados sócio-demográficos e clínicos, registro das avaliações periódicas, e avaliação da qualidade de vida relacionada à saúde (QVRS) EORTC-QLQ-30 e EORTC-QLQ-BR23. Os dados foram analisados por meio de: modelo ANOVA, teste de Kruskal-Wallis, qui-quadrado, exato de Fisher, modelo de riscos proporcionais de Cox e modelo de efeitos mistos. O projeto foi aprovado por Comitê de Ética em Pesquisa. Resultados: Todas as pacientes da amostra apresentaram radiodermatites em algum grau. As incidências de reações graus 1, 2 e 3 foram, respectivamente: 58%, 25% e 17% para o grupo Intervenção; 36%, 29% e 36% para o grupo Controle 1; e 50%, 43% e 7% para o grupo Controle 2. Não houve diferenças significativas entre os grupos do estudo no que concerne ao grau de radiodermatite, QVRS e temperaturas das mamas. Observou-se uma tendência para potencial efeito protetor do creme com nanopartículas contendo vitamina E no que concerne ao tempo para aparecimento da radiodermatite nas pacientes que não receberam a dose de boost (p=0,03) e ocorrência de eritema leve inframamário (p=0,04). Prurido foi reportado por 90% das mulheres, apresentando por mais tempo naquelas do grupo Intervenção (p=0,05). Os dados encontrados permitiram subsidiar o cálculo amostral para o ensaio clinico definitivo, que deverá ser composto de 108 pacientes. Conclusões: Observou-se um potencial efeito protetor do creme com nanopartículas contendo vitamina E com relação ao tempo para aparecimento da radiodermatite e ocorrência de eritema leve inframamário. Não foram observadas diferenças significativas entre os grupos do estudo com relação a incidência e intensidade de radiodermatites, QVRS e temperatura das mamas. Amostra constituída de 108 pacientes deverá compor o ensaio clínico definitivo para evidenciar as hipóteses levantadas neste estudo piloto.


Introduction: Despite the promising action of antioxidant agents against radiodermatitis, studies on this topic are still poorly consistent. In view of these considerations, vitamin E transmitted through nanotechnology action on radiodermatitis prevention was questioned. Aims: To evaluate acute radiodermatitis prevention effect of topical application of a cream with lipid nanoparticles containing vitamin E (final concentration of 2%) in women with breast cancer submitted to radiotherapy. Method: Randomized, double blind pilot study performed at a cancer hospital in Minas Gerais. The sample consisted of 40 women, divided into three groups: Intervention - they performed topical application of the cream with lipid nanoparticles containing vitamin E; Control 1 - they performed topical application of the cream without lipid nanoparticles and without vitamin E; Control 2 - performed the topical application of cream with lipid nanoparticles without vitamin E. The incidence of radiodermatitis, the classification (by the RTOG and CTCAE scoring systems) and the time for appearance of the reaction were considered primary outcomes; quality of life, breast temperature and symptoms reported as secondary outcomes. All participants followed the standard guidelines for the prevention of radiodermatitis, performed the application of cream three times a day and were evaluated three times a week. Four instruments were used to collect data: socio-demographic and clinical data, record of periodic evaluations, and health-related quality of life assessment (HRQoL) - EORTC-QLQ-30 and EORTC-QLQ-BR23. The data were analyzed by means of: ANOVA model, Kruskal-Wallis test, chi-square test, Fisher's exact test, Cox proportional hazards model and mixed effects model. The project was approved by the Research Ethics Committee. Results: All patients in the sample presented radiodermatitis to some degree. The incidence of grade 1, 2 and 3 reactions were, respectively: 58%, 25% and 17% for the intervention group; 36%, 29% and 36% for the Control 1 group; and 50%, 43% and 7% for Control group 2. There were no significant differences between the study groups regarding the degree of radiodermatitis, HRQoL and breast temperatures. There was a trend towards a potential protective effect of the cream with vitamin E-containing nanoparticles regarding the time to onset of radiodermatitis in patients who did not receive the boost dose (p = 0.03) and the occurrence of mild inframammary erythema (p = 0.04). Pruritus was reported by 90% of the women, presenting more time in the Intervention group (p = 0.05). The colected data allowed to calculate the sample size for the definitive clinical trial, which should be composed of 108 patients. Conclusions: It was observed a potential protective effect of the cream with nanoparticles containing vitamin E concerning to the time of radiodermatitis appearance and the occurrence of inframammary light erythema. There were no significant differences between the study groups regarding the incidence and intensity of radiodermatitis, HRQoL and breast temperature. A sample consisting of 108 patients should compose the definitive clinical trial to highlight the hypotheses raised in this pilot study.


Subject(s)
Oncology Nursing , Radiotherapy , Vitamin E , Nursing Care , Nanotechnology , Antioxidants
18.
Int. j. morphol ; 36(4): 1350-1355, Dec. 2018. graf
Article in English | LILACS | ID: biblio-975707

ABSTRACT

SUMMARY: We sought to investigate the potential protective effect of Vitamin E supplementation against hepatocyte ultrastructural alterations induced by high fat diet (HFD) in a rat model of pre-diabetes. Therefore, rats were either fed with HFD (model group) or a standard laboratory chow (control group) for 12 weeks before being sacrificed. The protective group fed on a HFD and started the treatment with vitamin E (100 mg/kg/day, i.p) from day 1 until being sacrificed at week 12. The harvested liver tissues were examined using transmission electron microscopy (TEM) and blood samples were assayed for biomarkers of liver injury and prediabetes. TEM images showed that HFD induced profound pathological changes to the hepatocyte ultrastructure as demonstrated by degenerated hepatocytes with damaged cytoplasm that have mitochondrial swelling, dilation of endoplasmic reticulum, blebbing of plasma membranes, and cytoplasmic accumulations of lipid droplets and vacuoles, which were substantially but not completely protected with vitamin E. In addition, HFD significantly (p<0.05) augmented biomarkers of liver injury and pre-diabetes such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), tumor necrosis factor-alpha (TNF-α), malondialdehyde (MDA), total cholesterol (TC), triglycerides (TG), and low density lipoprotein cholesterol (LDL-C), which were significantly (p<0.05) reduced with vitamin E except TNF-α and TC. Furthermore, none of these biomarkers were reduced to the control level by vitamin E. We conclude that vitamin E is a partial protective agent against HFD-induced liver injury and pre-diabetes.


RESUMEN: El objetivo de este estudio fue investigar el posible efecto protector de la administración de suplementos de vitamina E contra las alteraciones ultraestructurales de los hepatocitos inducidas por una dieta rica en grasas (DRG) en un modelo de prediabetes en ratas. Antes de ser sacrificadas las ratas fueron alimentadas con DRG (grupo modelo) o un alimento estándar de laboratorio (grupo control) durante 12 semanas. El grupo protector se alimentó con una DRG y comenzó el tratamiento con vitamina E (100 mg/kg/día, i.p) desde el día 1 hasta sacrificarlo en la semana 12. Los tejidos hepáticos recolectados se examinaron mediante microscopía electrónica de transmisión (MET) y se tomaron muestras de sangre y se analizaron los biomarcadores de daño hepático y prediabetes. Las imágenes de MET mostraron que el DRG indujo cambios patológicos profundos en la ultraestructura de los hepatocitos, como lo demuestran los hepatocitos degenerados con citoplasma dañado e hinchazón mitocondrial, dilatación del retículo endoplasmático, formación de ampollas en las membranas plasmáticas y acumulaciones citoplásmicas de gotas de lípidos y vacuolas, los que fueron sustancialmente protegidas con vitamina E. Además, DRG aumentó significativamente (p <0,05) los biomarcadores de daño hepático y prediabetes como alanina aminotransferasa (ALT), aspartato aminotransferasa (AST), factor de necrosis tumoral alfa (TNF-α), malondialdehído (MDA), colesterol total (CT), triglicéridos (TG) y lipoproteína de colesterol de baja densidad (LDL-C), la cual se redujo significativamente (p <0,05) con vitamina E, excepto TNF-α y CT. Ninguno de estos biomarcadores se redujo al nivel de control por la vitamina E. Concluimos que la vitamina E es un agente protector parcial contra la lesión hepática inducida por DRG y la prediabetes.


Subject(s)
Animals , Rats , Prediabetic State/drug therapy , Vitamin E/administration & dosage , Hepatocytes/drug effects , Diet, High-Fat/adverse effects , Aspartate Aminotransferases/drug effects , Vitamin E/pharmacology , Cholesterol/analysis , Tumor Necrosis Factor-alpha/drug effects , Oxidative Stress/drug effects , Hepatocytes/ultrastructure , Microscopy, Electron, Transmission , Alanine Transaminase/drug effects , Disease Models, Animal , Non-alcoholic Fatty Liver Disease/prevention & control , Liver/drug effects , Malondialdehyde/analysis
20.
Acta bioquím. clín. latinoam ; 52(2): 213-226, jun. 2018. graf, tab
Article in Spanish | LILACS | ID: biblio-949335

ABSTRACT

Debido a la importancia que han alcanzado las algas en la alimentación de los países occidentales aquí se estudió el potencial de las algas Nori y Wakame como fuentes de fibra y capacidad antioxidante en ratas en crecimiento alimentadas con dietas suficientes o deficientes en vitamina E (vit E) durante 15 días. Hubo 3 grupos de ratas que recibieron dietas: 1. grupo control, 2. grupo Nori y 3 grupo Wakame con vit E y 3 grupos similares sin vit E. En las dietas con vit E, Nori produjo una reducción de crecimiento y las dos algas causaron una acumulación de vit E hepática, una reducción en la vit E plasmática y un aumento en TBARS en plasma e hígado. En contraste, cuando las algas se ofrecieron en dietas exentas de vit E, el grupo Nori recuperó su capacidad de crecer, mantuvo una mayor reserva de vit E en el hígado que el grupo control deficiente en vit E y el consumo de ambas algas resultó en TBARS plasmáticos por debajo de las ratas controles deficientes en vit E, lo que señaló que las algas se comportaron mejor en dietas sin vit E. Adicionalmente, se observó que las algas estimularon la función excretora del intestino sin afectar su capacidad absortiva.


In western countries, edible seaweed consumption has markedly increased in recent years. Accordingly, in this study the antioxidant capacity and fiber value of Nori and Wakame algae were evaluated in growing rats fed with sufficient of deficient vitamin E. There were 3 groups of rats: 1. Control, 2. Nori and 3. Wakame with vitamin E and 3 similar groups without vitamin E. The diet with Nori and sufficient vitamin E caused a reduction in growth and Nori and Wakame were associated with liver vitamin E accumulation, plasma vitamin E reduction and an increase in TBARS in liver and plasma. In contrast, when the same diets were offered without vitamin E, the Nori fed rats recovered their growing capacity, they maintained a higher vitamin E reserve than the control or Wakame fed rats, and the consumption of both algae was associated with lower plasma TBARS than vitamin E deficient rats, indicating that these algae are best accepted when offered without vitamin E. In addition, both algae improved the excretory capacity of the intestine without affecting its absorption function.


Visto que nos países ocidentais revestiu importância o consumo de algas na alimentação, aqui foi estudado o potencial das algas Nori e Wakame como fontes de fibra e capacidade antioxidante em ratos em crescimento, alimentados com dietas suficientes ou deficientes em vitamina E (vit E) durante 15 dias. Houve 3 grupos de ratos que receberam dietas: 1. grupo controle, 2. grupo Nori e 3. grupo Wakame com vit E e 3 grupos similares sem vit E. Nas dietas com vit E, Nori produziu uma redução no crescimento e as duas algas provocaram uma acumulação de vit E hepática, redução da vit E plasmática e aumento em TBARS em plasma e fígado. Em contraste, quando as algas foram oferecidas em dietas sem vitamina E, o grupo Nori recuperou sua capacidade de crescimento, manteve maior reserva de vit E no fígado do que o grupo controle deficiente em vit E e o consumo de ambas as algas resultou em TBARS plasmáticos mais baixos do que nos ratos do grupo controle deficientes em vitamina E, indicando que essas algas são melhor aceitas quando oferecidas sem vit E. E, também, as algas melhoraram a capacidade de excreção do intestino sem afetar sua função de absorção.


Subject(s)
Vitamin E , Vitamin E Deficiency , Food Technology , Antioxidants , Rats , Thiobarbituric Acid Reactive Substances , Diet , Absorption , Growth
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