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Menopause is a critical stage in a woman's life in which cardiometabolic alterations appear, such as insulin resistance or a predisposition to visceral fat deposits, leading to an increased risk of cardiometabolic diseases (R-CMBs). New strategies to reduce the R-CMBs in postmenopausal women using natural compounds without adverse effects are desirable. In this sense, plant-based diets rich in fruits and vegetables could play a fundamental role due to the high content of bioactive compounds found in these diets, such as (poly)phenols, known for their antioxidant, anti-inflammatory and vasodilator properties. The aim of this research was to carry out a dietary trial to evaluate the effect of the daily intake of different (poly)phenol-rich foods (PP-rich foods) for 2 months on the modulation of the main cardiometabolic risk biomarkers of postmenopausal women. The results showed a slight improvement in blood pressure (BP), lipid profile and oxidative stress, endothelial function and inflammatory biomarkers. These findings suggest that daily consumption of PP-rich foods alleviated the R-CMBs of postmenopausal women by reducing the oxidative stress and, thus, the risk of cardiovascular events; however, the magnitude of the cardioprotective effect of (poly)phenols depends on inter-individual variability.
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Honey is traditionally used for its medicinal properties attributed to its antibacterial and antioxidant effects. It is considered a natural alternative to conventional antibiotics. This effect has been attributed to their physico-chemical properties, as various chemical parameters can synergistically influence this effect. The aim of this study is to assess Spanish honeys of diverse botanical origins for their antibacterial efficacy against Staphylococcus epidermidis, correlating their physico-chemical attributes, (poly)phenol content, and antioxidant activity. The methods included colour determination via two methodologies, acidity, pH, moisture content, and sugar concentration. (Poly)phenol content was quantified using the Folin-Ciocalteau method, while antioxidant activity was evaluated via the FRAP method. Subsequently, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against S. epidermidis were investigated with different concentrations of honeys. The results revealed a direct relationship between honey darkness, (poly)phenol concentration, antioxidant activity, and antibacterial efficacy. Darker honeys exhibited higher (poly)phenol levels, greater antioxidant activity, and consequently, lower MIC and MBC values, showing enhanced antibacterial properties. These findings underscore the potential of honey as a therapeutic agent against S. epidermidis, particularly in wound healing applications to avoid infection. Further research into honey's multifaceted properties is warranted to unveil novel therapeutic avenues in healthcare.
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Antibacterianos , Antioxidantes , Mel , Testes de Sensibilidade Microbiana , Staphylococcus epidermidis , Staphylococcus epidermidis/efeitos dos fármacos , Mel/análise , Antibacterianos/farmacologia , Antioxidantes/farmacologia , EspanhaRESUMO
In Europe, around 31 million tonnes of food by-products are generated during primary production and trade. The management of these by-products may cause a negative impact, both at the economic and environmental levels, for both industry and society. In this regard, taking into consideration that these by-products retain the dietary fibre compositions and the bioactive compounds of the starting materials, plant food agro-industries have an interest in taking advantage of them, from a nutritional point of view. Therefore, this review evaluates the role of dietary fibre and bioactive compounds in these by-products as well as the potential interactions of both components and their implications for health, since the bioactive compounds associated with fibre may reach the colon, where they can be metabolised into postbiotic compounds, providing important health benefits (prebiotic, antioxidant, anti-inflammatory, etc.). Consequently, this aspect, on which there are few studies, is very relevant and must be considered in the revaluation of by-products to obtain new ingredients for food processing with improved nutritional and technological properties.
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Menopause is characterized by endocrine and physiological changes and is often accompanied by increased body weight and cholesterol, glucose intolerance, and/or hypertension. These alterations are associated with increased risk for cardiovascular diseases (CVDs) and Type II diabetes mellitus (T2DM) that may be moderate by dietary plant phenolic compounds. In this review, we examine the current evidence of the impact of a variety of plant products (foods, extracts, beverages) rich in a mixture of phenolics and polyphenols on: (i) glucose and insulin levels; (ii) lipid profile; (iii) blood pressure; and (iv) biomarkers of inflammation and oxidative stress in postmenopausal women. We critically evaluate both the results of a range of intervention studies conducted in this specific subpopulation and the level of evidence supporting the benefits of consuming those products after the menopause. Overall, the current available evidence does not allow for specific dietary recommendations of these plant products rich in phenolics and polyphenols in this high-risk subpopulation. Our data show rather variable and small effects of the different products examined on the cardiometabolic biomarkers and further support the need to: (1) improve the quality of the study designs and data reporting; and (2) understand the variability in the response of the different biomarkers and establish clear differences between healthy and cardiometabolic disease levels.
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Suplementos Nutricionais , Hidroxibenzoatos/farmacologia , Polifenóis/farmacologia , Pós-Menopausa/efeitos dos fármacos , Biomarcadores/sangue , Glicemia/efeitos dos fármacos , Pressão Sanguínea/efeitos dos fármacos , Fatores de Risco Cardiometabólico , Feminino , Humanos , Insulina/sangue , Lipídeos/sangue , Síndrome Metabólica/etiologia , Síndrome Metabólica/prevenção & controle , Pessoa de Meia-Idade , Estresse Oxidativo/efeitos dos fármacos , Pós-Menopausa/sangueRESUMO
INTRODUCTION: Background: peri- and post-menopausal women exhibit a high tendency towards obesity and visceral fat deposition, which increases cardiometabolic risk. Objective: to evaluate through a prospective nutritional study the effect of carotenoid consumption on cardiometabolic risk biomarkers in peri- and post-menopausal women. Material and methods: twelve peri- and post-menopausal women without previous symptoms of cardiovascular disease, but with some cardiometabolic risk factor, were recruited. Their diet was supplemented during 4 weeks with orange-carrot juice, tomato juice, and boiled spinach, providing 415 mg of total carotenoids/week (carotenes, cryptoxanthin, lycopene, and lutein + zeaxanthin). At the beginning (TI) and at the end (TF) of the intervention period blood samples were drawn to measure biochemical parameters, oxidative stress, inflammation and endothelial function biomarkers, and plasma carotenoid levels. Results: at TF a significant decrease (p < 0.05) in LDL-cholesterol and atherogenic index, and an increase in HDL-cholesterol were observed. Plasma carotenoids increased significantly (p < 0.05) from 0.56 µg/mL at TI to 1.22 µg/mL at TF. Concurrently, a shift in oxidative stress and inflammation biomarkers was detected, with a decrease in plasma C-reactive protein and malonaldehyde levels, and an increase in adiponectin. However, endothelial dysfunction biomarkers (sVCAM and sICAM) and total antioxidant capacity remained unchanged. Conclusions: dietary supplementation with carotenoids leads to an increase in plasma carotenoids, a decrease in atherogenic dyslipidemia, and an improvement in oxidative stress and inflammation biomarkers, which indicates a reduction in cardiometabolic risk.
INTRODUCCIÓN: Introducción: durante la menopausia hay una mayor tendencia a la obesidad y el depósito de grasa visceral, aumentando el riesgo cardiometabólico. Objetivos: evaluar mediante un estudio de intervención el efecto del consumo de carotenoides sobre los biomarcadores relacionados con el riesgo cardiometabólico en mujeres peri y posmenopáusicas. Métodos: se seleccionaron 12 mujeres peri y posmenopáusicas, sin antecedentes de enfermedad cardiovascular pero con algún factor de riesgo cardiometabólico. Durante 4 semanas se suplementó su dieta con zumo de naranja-zanahoria, zumo de tomate y espinacas cocidas, proporcionando una ingesta de 415 mg de carotenoides totales a la semana (carotenos, criptoxantina, licopeno y luteína + zeaxantina). En el momento inicial (TI) y en el final (TF) se midieron los parámetros antropométricos y se analizaron los parámetros bioquímicos, los carotenoides plasmáticos y los biomarcadores de estrés oxidativo, de inflamación y de función endotelial. Resultados: en el TF se observaron cambios significativos, disminuyendo el colesterol unido a LDL y el índice aterogénico, y aumentando el colesterol-HDL. Los carotenoides plasmáticos se incrementaron significativamente (p < 0,05) de 0,56 µg/ml en el TI hasta 1,22 µg/ml en el TF. Paralelamente se observaron cambios significativos (p < 0,05) en los biomarcadores de estrés oxidativo e inflamación, disminuyendo la proteína C-reactiva y el malonaldehído, y aumentando la adiponectina. Por el contrario, los biomarcadores de daño endotelial (sVCAM y sICAM) y la capacidad antioxidante (ORAC) no mostraron cambios tras la intervención. Conclusiones: el consumo de carotenoides aumenta los niveles plasmáticos de carotenoides y disminuye la dislipemia aterogénica, y mejora los biomarcadores de inflamación y el estrés oxidativo, lo que está relacionado con una disminución del riesgo cardiometabólico.
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Biomarcadores/análise , Fatores de Risco Cardiometabólico , Carotenoides/administração & dosagem , Suplementos Nutricionais/normas , Menopausa/metabolismo , Idoso , Biomarcadores/sangue , Carotenoides/uso terapêutico , Suplementos Nutricionais/estatística & dados numéricos , Feminino , Humanos , Menopausa/fisiologia , Pessoa de Meia-Idade , Estresse Oxidativo/efeitos dos fármacos , Estresse Oxidativo/fisiologia , Estudos ProspectivosRESUMO
Eating chocolate in the morning or in the evening/at night, may differentially affect energy balance and impact body weight due to changes in energy intake, substrate oxidation, microbiota (composition/function), and circadian-related variables. In a randomized controlled trial, postmenopausal females (n = 19) had 100 g of chocolate in the morning (MC), in the evening/at night (EC), or no chocolate (N) for 2 weeks and ate any other food ad libitum. Our results show that 14 days of chocolate intake did not increase body weight. Chocolate consumption decreased hunger and desire for sweets (P < .005), and reduced ad libitum energy intake by ~300 kcal/day during MC and ~150 kcal/day during EC (P = .01), but did not fully compensate for the extra energy contribution of chocolate (542 kcal/day). EC increased physical activity by +6.9%, heat dissipation after meals +1.3%, and carbohydrate oxidation by +35.3% (P < .05). MC reduced fasting glucose (4.4%) and waist circumference (-1.7%) and increased lipid oxidation (+25.6%). Principal component analyses showed that both timings of chocolate intake resulted in differential microbiota profiles and function (P < .05). Heat map of wrist temperature and sleep records showed that EC induced more regular timing of sleep episodes with lower variability of sleep onset among days than MC (60 min vs 78 min; P = .028). In conclusion, having chocolate in the morning or in the evening/night results in differential effects on hunger and appetite, substrate oxidation, fasting glucose, microbiota (composition and function), and sleep and temperature rhythms. Results highlight that the "when" we eat is a relevant factor to consider in energy balance and metabolism.
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Apetite/efeitos dos fármacos , Índice de Massa Corporal , Carboidratos/química , Chocolate/efeitos adversos , Fome/efeitos dos fármacos , Microbiota/efeitos dos fármacos , Idoso , Glicemia/análise , Estudos Cross-Over , Ingestão de Energia , Jejum , Feminino , Humanos , Pessoa de Meia-Idade , Período Pós-Prandial , Fatores de TempoRESUMO
Different strategies have been developed to increase the concentration of bioactive compounds in tomatoes during post-harvest, with ultraviolet light (UV) and light emitting diodes (LEDs) being interesting tools. The aim of this study was to evaluate the effect of ultraviolet (UVA at 366 nm and UVC at 254 nm) pre-treatment (1 kJ/m2) and red-blue LED light (25.4 µmol/m2/s) on the concentration of carotenoids, (poly)phenols and hydrophilic/lipophilic antioxidant capacity during 7 days of refrigeration storage of green tomatoes (Solanum lycopersicum L.) cultivar "Raf". In addition, special attention was paid to quality parameters (weight loss, colour, acidity, soluble solids and ripening index). Tomatoes exposed to LED light at 6 °C for 7 days increased up to three times the total carotenoids content (mainly ß-carotene and E-lycopene) compared to tomatoes refrigerated in the dark, while UV treatments alone did not significantly affect the carotenoid content. Besides, exposure to LEDs increased the hydrophilic and lipophilic antioxidant capacity of tomatoes by 30%, without affecting phenolic contents. Thus, LED treatments alone during refrigerated storage fostered ripening and improved the nutritional value of tomatoes, without compromising quality parameters. Further studies must be carried out to evaluate the impact on sensory attributes and consumer acceptance.
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Conservação de Alimentos , Frutas/química , Compostos Fitoquímicos/análise , Refrigeração , Solanum lycopersicum/química , Raios Ultravioleta , IluminaçãoRESUMO
BACKGROUND AND OBJECTIVE: Neuronal populations involved in the regulation of food intake, particularly the orexigenic (appetite-stimulating) hormone ghrelin, are found in the hypothalamus. Changes in plasma ghrelin levels have been observed following different bariatric surgery procedures, but the results from different studies are contradictory. Much remains unknown regarding the role of ghrelin in the weight loss process following bariatric surgery. Our objective was to describe the behaviour of fasting ghrelin levels, comparing the changes occurring between 2 different surgical techniques (gastric bypass versus vertical sleeve gastrectomy) and their correlation with weight loss. PATIENTS AND METHOD: A prospective, observational, analytic cohort study of 54 patients (27 for each surgical technique) with a 12-month follow-up period. We analysed demographic data, anthropometric data, comorbidities, weight loss and evolution of fasting ghrelin. RESULTS: The behaviour of acylated ghrelin was similar with the 2 surgical techniques, with no significant differences between gastric bypass and vertical sleeve gastrectomy. With both procedures, there was an increase in acylated ghrelin on day 5 and a subsequent decrease, and levels then gradually increased to reach values at 12 months that were higher than those reported preoperatively. This increase in ghrelin levels did not affect weight loss, since one year post-surgery, 30% weight loss was achieved with both types of surgery. CONCLUSIONS: We observed an increase in fasting acylated ghrelin levels at one year of follow-up with both surgical techniques, with 30% weight loss.
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Jejum/sangue , Gastrectomia/métodos , Derivação Gástrica , Grelina/sangue , Obesidade Mórbida/sangue , Obesidade Mórbida/cirurgia , Redução de Peso , Adulto , Estudos de Coortes , Correlação de Dados , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
The nutritional composition - including total and individual phenolic compounds, carotenoids, and the antioxidant capacity - of two commercially available edible flowers, pansy and snapdragon, was studied. The edible flowers did not differ in their carbohydrates, fat, or ash contents, or in total energy, but pansy had higher values of moisture, protein, and total dietary fiber than snapdragon. Phenolic compounds were more abundant in pansy than in snapdragon, and flavonoids were the major compounds, followed by anthocyanins. The phenolic profile of pansy included flavonols, such as quercetin and isorhamnetin glycosides, flavones, such as apigenin glycosides, and anthocyanins, such as cyanidin and delphinidin glycosides; in snapdragon it included flavonol glycosides (e.g. quercetin and kaempferol glycosides) and anthocyanins, such as cyanidin and pelargonidin glycosides. The contents of total carotenoids were 146 and 29⯵g/mg for pansy and snapdragon, respectively, and lutein was the dominant compound.
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Antirrhinum/química , Extratos Vegetais/química , Viola/química , Antocianinas/análise , Antioxidantes/análise , Carotenoides/análise , Flavonoides/análise , Flavonóis/análise , Flores/química , Glicosídeos/análise , Luteína/análise , Fenóis/análise , Extratos Vegetais/isolamento & purificaçãoRESUMO
Previous studies using a BALB/cOlaHsd model have shown the impact that the supplementation of infant formula with polyamines has on the modulation of microbial colonization and immune system development. To contribute to deciphering and identifying new complex interactions underlying the host response to polyamines, a systems biology approach integrating data from microbiota along the gastrointestinal tract, lymphocyte populations and immune system gene expression analysis of a lactating mice model fed different diets was carried out. The study design included four different dietary regimens including the following: mice fed by normal lactation; early weaned mice given commercial infant formula; and early weaned mice fed with infant formula enriched with two different concentrations of polyamines. Cluster analysis by principal component analysis and heat map demonstrated that the bacterial communities and immune system status differed between groups. The assessment of the relationship between immune system development, microbiota succession and polyamine supplementation in a global manner proved that the supplementation of infant formula with polyamines promotes similar microbial communities along the whole gastrointestinal tract, and results in similar lymphocyte populations and expression of immune related-genes to those with the normal lactated milk and the results differ from those with the infant formula without polyamines. Further studies should be conducted in human subjects to verify the current results, as the supplementation of polyamines may resemble the effect of natural breastfeeding practices in the gastrointestinal microbiota and immune system development in a mouse model.
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Microbioma Gastrointestinal , Trato Gastrointestinal/microbiologia , Fórmulas Infantis/análise , Poliaminas/análise , Transcriptoma/efeitos dos fármacos , Animais , Suplementos Nutricionais/análise , Feminino , Trato Gastrointestinal/metabolismo , Humanos , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Poliaminas/farmacologiaRESUMO
In the body, the reactions by which energy is created produce reactive oxygen molecules (ROS). ROS can damage biomolecules such as lipids, proteins, carbohydrates, proteins and DNA, which has been linked to chronic diseases such as cancer, cardiovascular diseases, inflammatory processes, diabetes and aging. Antioxidants present in foods can counteract the harmful effect of ROS. The aim of this study was to quantify the average intake of antioxidant capacity in the Spanish diet. For this purpose, average daily food intake published in the National Survey of Spanish Dietetics in 2011 and the database that has been published by the USDA (based on the ORAC) was used. The Spanish population surpassed the estimated daily recommendation of antioxidants and was superior to other countries that have similar diets.
En el organismo, las reacciones mediante las cuales se obtienen la energía producen moléculas reactivas de oxígeno (ROS). Los ROS pueden dañar biomoléculas como los lípidos, proteínas, hidratos de carbono, proteínas y el ADN; y esto han sido relacionados con enfermedades crónicas como el cáncer, enfermedades cardiovasculares, procesos inflamatorios, diabetes y el envejecimiento Los antioxidantes presentes en los alimentos pueden contrarrestar el efecto nocivo de los ROS. El objetivo de este estudio fue cuantificar mediante la ingesta media de los españoles de índice de capacidad antioxidante. Para ello se empleó la ingesta media de alimentos por día de los españoles publicada en la Encuesta Nacional de Dietética Española del año 2011 y la base de datos que ha publicado la USDA (basada en el ORAC). La población española superó la recomendación diaria estimada de antioxidantes, siendo incluso superior a otros países que siguen dietas muy similares.
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Humanos , Adulto , Dieta , Alimentos , Antioxidantes , Ingestão de AlimentosRESUMO
The aims of the present study were to ascertain, indirectly, the prebiotic role of tomato juice, by analyzing its effect on the content of short chain fatty acids (SCFA) in feces of rats, and to determine the plausible mechanisms related to the hypocholesterolemic effects of tomato juice and lycopene, evaluating the activity of hepatic HMGCR and the formation of propionic acid. Two commercially available tomato juices with differing contents of lycopene (low and high lycopene contents: Llyc and Hlyc tomato juices) were used. Sprague-Dawley male rats were randomly divided into three experimental groups (n = 8): control group, normal diet and water; group 1, normal diet and Llyc tomato juice; and group 2, normal diet and Hlyc tomato juice, which were fed ad libitum for three weeks. Feces were collected at the beginning and the end of the study to determine SCFA, and blood and liver were obtained (after sacrificing the animals) to analyze the lipid plasmatic parameters and the HMGCR activity and total cholesterol, respectively. No significant differences were observed in the plasmatic parameters, except that HDL-cholesterol increased significantly after consumption of both tomato juices. Lycopene was accumulated in the liver in proportion to the amount ingested, and was observed to have an inhibitory effect on the HMGCR enzyme, according to the amount of lycopene in the liver. In relation to the SCFA in feces, no differences were observed in acetate and propionate after the consumption of tomato juice, but a significant increase in butyrate was observed in group 2 after the intake of Hlyc tomato juice. The content of this carboxylic acid together with excreted lycopene in feces could have a beneficial effect on colonic cells.
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Fezes/química , Sucos de Frutas e Vegetais , Hidroximetilglutaril-CoA Redutases/metabolismo , Lipídeos/sangue , Fígado/metabolismo , Solanum lycopersicum , Ração Animal , Animais , Dieta , Ácidos Graxos/química , Regulação Enzimológica da Expressão Gênica/efeitos dos fármacos , Hidroximetilglutaril-CoA Redutases/genética , Ratos , Ratos Sprague-DawleyRESUMO
Non-alcoholic fatty liver disease (NAFLD) is the most common liver disorder in Western countries, with a high prevalence, and has been shown to increase the risk of type 2 diabetes, cardiovascular disease (CVD), etc. Tomato products contain several natural antioxidants, including lycopene-which has displayed a preventive effect on the development of steatosis and CVD. Accordingly, the aim of the present work was to evaluate the effect of tomato juice consumption on the urinary peptide profile in rats with NAFLD induced by an atherogenic diet and to identify potential peptide biomarkers for diagnosis. Urine samples, collected weekly for four weeks, were analyzed by capillary electrophoresis (CE) coupled to a mass spectrometer (MS). A partial least squares-discriminant analysis (PLS-DA) was carried out to explore the association between differential peptides and treatments. Among the 888 peptides initially identified, a total of 55 were obtained as potential biomarkers. Rats with steatosis after tomato juice intake showed a profile intermediate between that of healthy rats and that of rats with induced hepatic steatosis. Accordingly, tomato products could be considered as a dietary strategy for the impairment of NAFLD, although further research should be carried out to develop a specific biomarkers panel for NAFLD.
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Sucos de Frutas e Vegetais , Hepatopatia Gordurosa não Alcoólica/dietoterapia , Hepatopatia Gordurosa não Alcoólica/urina , Peptídeos/urina , Solanum lycopersicum , Animais , Biomarcadores/urina , Sucos de Frutas e Vegetais/análise , Solanum lycopersicum/química , Masculino , Hepatopatia Gordurosa não Alcoólica/diagnóstico , Ratos Sprague-DawleyRESUMO
In this work, two different technologies (electrospraying and nanospray drying) were evaluated for the encapsulation of folic acid using both a whey protein concentrate (WPC) matrix and a commercial resistant starch. The morphology of the capsules, molecular organization of the matrices upon encapsulation, encapsulation efficiency, and stability of the folic acid within the capsules under different storage conditions and upon thermal exposure were studied. Results showed that spherical nano-, submicro- and microcapsules were obtained through both techniques, although electrospraying led to smaller capsule sizes and to an enhanced control over their size distribution. Greater encapsulation efficiency was observed using WPC as encapsulating matrix, probably related to interactions between the protein and folic acid which favoured the incorporation of the bioactive. The best results in terms of bioactive stabilization in the different conditions assayed were also obtained for the WPC capsules, although both materials and encapsulation techniques led to improved folic acid stability, especially under dry conditions.
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Química Farmacêutica/métodos , Coloides/química , Suplementos Nutricionais/análise , Ácido Fólico/química , Cápsulas/química , Química Farmacêutica/instrumentação , Amido/química , Proteínas do Soro do Leite/químicaRESUMO
PURPOSE: Tomato products are a dietary source of natural antioxidants, especially lycopene, which accumulates in the liver, where it exerts biological effects. Taking into consideration this fact, the aim of the present study was to ascertain the effect of tomato consumption on biomarkers and gene expression related to lipid metabolism in rats with induced steatosis. METHODS: Adult male Sprague-Dawley rats (8 weeks old) were randomly grouped (n = 6 rats/group) in four experimental groups: NA (normal diet and water), NL (normal diet and tomato juice), HA (high fat diet and water) and HL (high fat diet and tomato juice). After 7 weeks, rats were euthanized, and plasma, urine, feces and liver were sampled to analyze the biomarkers related to lipid metabolism, inflammation and oxidative stress. RESULTS: The H diet induced steatosis (grade II) in the HA and HL groups, which was confirmed by the levels of alanine aminotransferase and aspartate aminotransferase, histological examination and the presence of dyslipidemia. The intake of tomato juice led to an accumulation of all-E and Z-lycopene and its metabolites in the livers of these animals; levels were higher in HL than in NL, apparently due to higher absorption (63.07 vs. 44.45%). A significant improvement in the plasma level of high-density lipoprotein was observed in the HL group compared with HA animals, as was an alleviation of oxidative stress through reduction of isoprostanes in the urine. In relation to fatty acid gene expression, an overexpression of several genes related to fatty acid transport, lipid hydrolysis and mitochondrial and peroxisomal ß-fatty acid oxidation was observed in the HL group. CONCLUSIONS: The consumption of tomato juice and tomato products reduced hallmarks of steatosis, plasmatic triglycerides and very low-density lipoproteins, and increased lipid metabolism by inducing an overexpression of genes involved in more efficient fatty acid oxidation.
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Bebidas , Biomarcadores/análise , Dieta , Fígado Gorduroso/prevenção & controle , Metabolismo dos Lipídeos/genética , Solanum lycopersicum , Animais , Carotenoides/administração & dosagem , Ácidos Graxos/metabolismo , Fígado Gorduroso/sangue , Fígado Gorduroso/metabolismo , Expressão Gênica , Inflamação/prevenção & controle , Metabolismo dos Lipídeos/fisiologia , Lipoproteínas VLDL/sangue , Fígado/metabolismo , Fígado/patologia , Licopeno , Masculino , Hepatopatia Gordurosa não Alcoólica/prevenção & controle , Estresse Oxidativo , RNA Mensageiro/análise , Ratos , Ratos Sprague-Dawley , Triglicerídeos/sangueRESUMO
The hypocholesterolemic effect of tomato juice has been investigated in an intervention study with rats, along with the possible inhibition effect of bioactive tomato compounds binding to the HMGCR enzyme. Two experimental groups (nâ=â8 Sprague-Dawley rats) were fed ad libitum for five weeks, with water or tomato juice provided to the control and intervention groups, respectively. Total, LDL and HDL cholesterol, and total triglycerides were analysed in plasma, and the lycopene content and the expression and activity of the enzyme HMGCR were determined in liver samples. A computational molecular modelling was carried out to determine the interactions between HMGCR and lycopene, chlorogenic acid and naringenin. Total, LDL and HDL cholesterol were significantly lower in the intervention group after the intake of tomato juice. In addition, a significant reduction in HMGCR activity was observed, although this was not accompanied by changes in gene expression. The molecular modelling showed that components of tomato can bind to the active site of the enzyme and compete with the ligand HMGCoA. Lycopene, from tomato juice, accumulates in the liver and can inhibit the activity of the rate-limiting enzyme of cholesterol biosynthesis, HMGCR.
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Bebidas , Hidroximetilglutaril-CoA Redutases/metabolismo , Fígado/enzimologia , Extratos Vegetais/metabolismo , Solanum lycopersicum/química , Animais , Antioxidantes/química , Antioxidantes/metabolismo , Carotenoides/química , Carotenoides/metabolismo , Ativação Enzimática , Ácido Fólico/química , Ácido Fólico/metabolismo , Hidroximetilglutaril-CoA Redutases/química , Ligantes , Lipídeos/sangue , Fígado/metabolismo , Licopeno , Masculino , Modelos Moleculares , Conformação Molecular , Simulação de Acoplamento Molecular , Fenóis/química , Fenóis/metabolismo , Extratos Vegetais/química , Ligação Proteica , RatosRESUMO
Edible flowers are commonly used in human nutrition and their consumption has increased in recent years. The aim of this study was to ascertain the nutritional composition and the content and profile of phenolic compounds of three edible flowers, monks cress (Tropaeolum majus), marigold (Tagetes erecta) and paracress (Spilanthes oleracea), and to determine the relationship between the presence of phenolic compounds and the antioxidant capacity. Proximate composition, total dietary fibre (TDF) and minerals were analysed according to official methods: total phenolic compounds (TPC) were determined with Folin-Ciocalteu's reagent, whereas antioxidant capacity was evaluated using Trolox Equivalent Antioxidant Capacity (TEAC) and Oxygen Radical Absorbance Capacity (ORAC) assays. In addition, phenolic compounds were characterised by HPLC-DAD-MSn. In relation to the nutritional value, the edible flowers had a composition similar to that of other plant foods, with a high water and TDF content, low protein content and very low proportion of total fat-showing significant differences among samples. The levels of TPC compounds and the antioxidant capacity were significantly higher in T. erecta, followed by S. oleracea and T. majus. Thirty-nine different phenolic compounds were tentatively identified, with flavonols being the major compounds detected in all samples, followed by anthocyanins and hydroxycynnamic acid derivatives. In T. erecta small proportions of gallotannin and ellagic acid were also identified.
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Antioxidantes/química , Asteraceae/química , Fenóis/análise , Espectrometria de Massas por Ionização por Electrospray , Tagetes/química , Tropaeolum/química , Antocianinas/análise , Asteraceae/metabolismo , Cromatografia Líquida de Alta Pressão , Flavonoides/análise , Flores/química , Flores/metabolismo , Tagetes/metabolismo , Tropaeolum/metabolismoRESUMO
UNLABELLED: We previously described the isolation and characterization of three probiotic strains from the feces of exclusively breast-fed newborn infants: Lactobacillus paracasei CNCM I-4034, Bifidobacterium breve CNCM I-4035 and Lactobacillus rhamnosus CNCM I-4036. These strains were shown to adhere to intestinal mucus in vitro, to be sensitive to antibiotics and to resist biliary salts and low pH. In the present study, a multicenter, randomized, double-blind, placebo-controlled trial with 100 healthy volunteers in three Spanish cities was carried out to evaluate the tolerance, safety, gut colonization and immunomodulatory effects of these three probiotics. Volunteers underwent a 15-day washout period, after which they were randomly divided into 5 groups that received daily a placebo, a capsule containing one of the 3 strains or a capsule containing a mixture of two strains for 30 days. The intervention was followed by another 15-day washout period. Patients did not consume fermented milk for the entire duration of the study. Gastrointestinal symptoms, defecation frequency and stool consistency were not altered by probiotic intake. No relevant changes in blood and serum, as well as no adverse events occurred during or after treatment. Probiotic administration slightly modified bacterial populations in the volunteers' feces. Intestinal persistence occurred in volunteers who received L. rhamnosus CNCM I-4036. Administration of B. breve CNCM I-4035 resulted in a significant increase in fecal secretory IgA content. IL-4 and IL-10 increased, whereas IL-12 decreased in the serum of volunteers treated with any of the three strains. These results demonstrate that the consumption of these three bacterial strains was safe and exerted varying degrees of immunomodulatory effects. TRIAL REGISTRATION: ClinicalTrials.gov NCT01479543.
Assuntos
Bifidobacterium/imunologia , Aleitamento Materno , Fezes/microbiologia , Fatores Imunológicos/farmacologia , Lacticaseibacillus rhamnosus/imunologia , Lactobacillus/imunologia , Probióticos/efeitos adversos , Probióticos/farmacologia , Adulto , Método Duplo-Cego , Feminino , Humanos , Imunoglobulina A/análise , Fatores Imunológicos/efeitos adversos , Interleucina-10/análise , Interleucina-4/análiseRESUMO
Infant cereals are often the elected foodstuff for beginning complementary feeding and provide carbohydrates which are different to those found in maternal milk. The objective of this preliminary study was to ascertain the colonic effects of two infant cereals, with different carbohydrate profiles, in a randomised and double-blind trial in healthy infants. Nineteen term infants between 6.3 and 9.8 months of age were enrolled, after written informed consent was obtained from parents. Ten subjects were allocated to take infant cereal A and nine, infant cereal B. An intervention period was 2 months, with five visits every 15 days, to take anthropometric measurements and faeces samples for the analysis of microbiota, short-chain fatty acids concentration (SCFA), pH value and secretory immunoglobulin A (sIgA). An adequate growth and stool frequency was registered in both intervention groups. Faecal counts of Bifidobacterium, Lactobacillus, Enterobacteriaceae, Enterococcus, Clostridium and Bacteroides did not show any statistical differences. However, a significantly (P < 0.05) higher butyric acid and sIgA, and lower faecal pH were observed in infants who had ingested infant cereal A, with a higher ratio complex/simple carbohydrates. In conclusion, small changes in the carbohydrate profile of infant cereals could lead to significant differences in parameters related to fermentative activity of intestinal microbiota.
Assuntos
Colo/fisiologia , Carboidratos da Dieta , Grão Comestível , Fenômenos Fisiológicos da Nutrição do Lactente/fisiologia , Biomarcadores/metabolismo , Colo/metabolismo , Colo/microbiologia , Carboidratos da Dieta/metabolismo , Método Duplo-Cego , Grão Comestível/química , Grão Comestível/metabolismo , Ácidos Graxos Voláteis/metabolismo , Fezes/química , Fezes/microbiologia , Feminino , Humanos , Concentração de Íons de Hidrogênio , Imunoglobulina A Secretora/metabolismo , Lactente , Masculino , Microbiota , Projetos PilotoRESUMO
The analytical process of lycopene extraction and photometrical determination was critically examined for raw tomato and processed tomato products by means of a 2 IV (15-10) Plackett-Burman experimental design in order to identify the key factors (KFs) involved. Fifteen apparent key factors (AKFs) reported in the literature were selected: sample weight (X1); volume of extraction solution (X2); antioxidant concentration (BHT, X3); neutralizing agent concentration (MgCO 3, X4); light presence during lycopene extraction (X5), homogenization velocity (X6) and time (X7), agitation time (X8), and temperature (X9) during the extraction process; water volume for separation of polar/nonpolar phases (X11); presence of inert atmosphere throughout the process (X12); time (X13), temperature (X14), and light presence (X10) during separation of phases and time delay for reading (X15). In general, higher lycopene concentrations in samples led to a higher number of key factors (KF). Thus, for raw tomato (lycopene range 1.22-2.29 mg/100 g) no KF were found, whereas for tomato sauce (lycopene range from 5.80 to 8.60 mg/100 g) one KF (X4) and for tomato paste (lycopene range from 35.80 to 51.27 mg/100 g) five KFs (X1, X2, X4, X11, and X12) were detected. For lycopene paste, X1 and X2 were identified as the KFs with the greatest impact on results, although in fact the X1/X2 ratio was the real cause. The results suggest that, with increased processing, the physical and chemical structure of lycopene becomes less important since the identified KFs explain almost 90% of variability in tomato paste but only 32% in raw tomato.