Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
1.
Rev. bras. plantas med ; 14(2): 362-369, 2012. ilus, tab
Article in Portuguese | LILACS | ID: lil-650679

ABSTRACT

O polvilho da fruta-de-lobo é um produto extraído da polpa da fruta-de-lobo verde (Solanum lycocarpum A. St.-Hil.), popularmente utilizado. Pouco se conhece a respeito desse polvilho, mas são atribuídos a ele vários efeitos terapêuticos, dentre eles a redução do colesterol. Este trabalho teve o objetivo de verificar a ação da administração do polvilho da fruta-de-lobo sobre animais hipercolesterolêmico. Utilizou-se 24 ratos Wistar fêmeas distribuídas em delineamento ao acaso, em três grupos contendo 8 animais em cada grupo. Estes grupos foram definidos como: controle normal (CN), controle hipocolesterolêmico (CH) e hipocolesterolêmico tratado (HT). O grupo CN recebeu dieta comercial, os grupo CH e HT receberam a dieta comercial enriquecida de colesterol e ácido cólico e o grupo HT recebeu também, 100 mg de polvilho da fruta-lobo, diariamente, por sonda orogástrica. O experimento teve uma duração de 6 semanas onde se avaliou o colesterol total sérico semanalmente, peso dos animais semanalmente e o consumo diário de ração. Ao término do experimento, foram avaliados os seguintes parâmetros: frações séricas de colesterol HDL, LDL+VLDL, peso do fígado, colesterol total hepático, lipídeos totais hepático e lâminas de microscopia foram feitas para avaliação dos hepatócitos. Não houve diferença significativa em relação ao peso corporal dos animais, ao consumo da dieta e nas análises de colesterol total sérico entre os grupos estudados. Avaliando-se a relação VLDL +LDL/HDL, os níveis encontrados no grupo HT foram significativamente menores que o grupo CH. Já em relação ao colesterol hepático, o grupo HT mostrou níveis menores de colesterol que o CH. Observou-se nos lipídeos hepáticos que não houve diferença significativa entre os grupo CH e HT, e no peso do fígado houve diferença significativa entre os grupos avaliados. Em relação à microscopia, os grupos hipercolesterolêmicos apresentaram discreta vacuolização no citoplasma dos hepatócitos. Concluiu-se, que o polvilho da fruta-de-lobo não influenciou o colesterol sérico dos animais, entretanto, reduziu os níveis de colesterol hepático.


The fruit-of-wolf flour is a product extracted from the pulp of green fruit-of-wolf (Solanum lycocarpum A. St .- Hil.) and is commonly used. Little is known about this flour, but several therapeutic effects, including cholesterol reduction, are attributed to it. This study aimed to verify the action of the administration of fruit-of-wolf flour to hypercholesterolemic animals. We used 24 female Wistar rats allocated in randomized design to three groups containing 8 animals each. These groups were defined as normal control (CN), hypocholesterolemic control (CH) and hypocholesterolemic treated rats (HT). The CN group received a commercial diet, while the CH and the HT group received the commercial diet enriched with cholesterol and cholic acid; the HT group also received 100 mg of fruit-of-wolf flour, daily, by orogastric tube. The experiment lasted for six weeks and the following characteristics were evaluated: weekly total serum cholesterol, weekly weight of animals and daily food intake. At the end of the experiment, we assessed the following parameters: serum cholesterol fractions HDL, LDL + VLDL, liver weight, liver total cholesterol, liver total lipids and microscopic slides were prepared for the evaluation of hepatocytes. There was no significant difference in body weight of animals, diet consumption and analysis of serum total cholesterol among the studied groups. Assessing the relationship VLDL + LDL / HDL, the levels found for the HT group were significantly lower than those for the CH group. As regards liver cholesterol, the HT group showed lower cholesterol levels than the CH group. For liver lipids there was no significant difference between the CH and the HT group, and for liver weight there was no significant difference among the studied groups. As to microscopy, the hypercholesterolemic groups showed slight vacuolization in the cytoplasm of hepatocytes. It was concluded that fruit-of-wolf flour did not influence the serum cholesterol of animals but reduced the levels of liver cholesterol.


Subject(s)
Animals , Female , Rats , Starch and Fecula , Anticholesteremic Agents/analysis , Cholesterol/pharmacology , Solanaceae/classification
2.
Rev. nutr ; 24(1): 161-172, jan.-fev. 2011. graf, tab
Article in English | LILACS | ID: lil-588217

ABSTRACT

This study evaluated the effects of soy protein containing isoflavones on the lipid profile of women. A meta-analysis including 13 eligible randomized controlled trials was carried out. The literature was systematically searched for randomized controlled trials on the effects of soy protein containing isoflavones on the serum lipids of adult women. The main searched databases were PubMed, Cochrane Library, MedLine, Lilacs and Web of Science. Randomized controlled trials were included if they met the following criteria: published from 1966 to 2005, the study population consisted of women only, had either a crossover or a parallel design and the amounts of soy protein and isoflavones consumed were provided. Weighted mean effect sizes were calculated for net changes in serum lipid concentrations using fixed-effects and random-effects models. Prespecified subgroup analyses were performed to explore the influence of covariates on net lipid change. Soy protein with isoflavones was associated with a significant decrease in total serum cholesterol (by 5.34mg/dL, or 2.4 percent, p=0.03). No significant associations were detected for low density lipoprotein-cholesterol, triacylglycerols and high density lipoprotein-cholesterol. Amounts of soy protein greater than 40g decreased total cholesterol by 6.56mg/dL (95 percent CI: -12.35 to -0.39, p=0.04). Soy protein supplementation had small statistically significant effects on the total serum cholesterol of women, but they were clinically insignificant. Furthermore, there were no statistically significant effects on serum low density lipoprotein-cholesterol, high density lipoprotein-cholesterol or triglycerides.


Avaliar o efeito da proteína de soja isolada contendo isoflavonas sobre os níveis de lipídeos séricos em mulheres adultas através de uma metanálise. Realizou-se uma busca sistemática de artigos nos bancos de dados Cochrane Library, MedLine e Web of Science databases. Foram selecionados somente ensaios clínicos randomizados que apresentavam os seguintes critérios: desenho do estudo paralelo ou crossover, publicados entre 1966 e 2005, sujeitos do sexo feminino, especificação da quantidade administrada de proteína de soja isolada contendo isoflavonas. Após criteriosa seleção e análise da qualidade dos estudos, conduziu-se uma metanálise incluindo 13 ensaios clínicos randomizados. O efeito do consumo de proteína de soja isolada sobre os níveis de lipídeos séricos foi calculado utilizando-se os modelos de efeito fixo e efeitos aleatórios. Realizou-se análise em subgrupos para avaliar a influência de covariáveis sobre alterações dos níveis de lipídeos sanguíneos. A metanálise mostrou que o consumo de proteína de soja isolada está associado à diminuição do colesterol-total (-5,34mg/dL, ou 2.4 por cento, p=0,03). Não se encontraram alterações significativas ao avaliar o lipoproteina de baixa densidade-colesterol, os triglicerídeos e o lipoproteina de alta densidade-colesterol. O consumo de proteína de soja isolada, em quantidades maiores ou iguais a 40g/dia, reduziu os níveis de colesterol-total em 6,56mg/dl (95 por cento IC: -12,35 a 0,39, p=0,04). Os achados sugerem efeitos estatisticamente significativos de pequena magnitude sobre os níveis de lipídeos séricos em mulheres, mas clinicamente insignificativos. Além disso, não foram encontrados efeitos estatisticamente significativos sobre a concentração sérica de lipoproteina de baixa densidade-colesterol, lipoproteina de alta densidade-colesterol ou triglicerídios.


Subject(s)
Humans , Female , Adult , Anticholesteremic Agents/analysis , Soybean Proteins/metabolism , Soybean Proteins/therapeutic use
3.
Egyptian Journal of Pharmaceutical Sciences. 2009; 50: 159-171
in English | IMEMR | ID: emr-126485

ABSTRACT

The statins form a class of hypolipidemic drugs used to lower cholesterol in people with or at risk of Coronary Heart Diseases [CHD] through inhibitionof 3-Hydroxy-3-MethylGutaryl-coenzyme A [HMC-CoA] reductase, which is the rate-limiting enzyme of the mevalonate pathway of cholesterol synthesis. Aorvastatin, lovastatin, rosuvastatin and simvastatin are commonly marketed statins. Previous studies involved estimation of statins either separately or in combination only through gradient elution. The novelty in the present study involved the use of a reversed phase HPLC C[18] column in one isocratic run through hydrolysis into the hydroxyacids of the mixture components via pH gradient vehicle. The study develops rapid, precise, accurate and reproducible method to determine these statins in a mixture and in their dosage forms. The method was validated over a wide concentration range [0.08 micro g to 3.2 micro g], its repeatability was ascertained and the applicability is confirmed


Subject(s)
Pyrroles/analysis , Anticholesteremic Agents/analysis , Chromatography, High Pressure Liquid/methods , /methods
SELECTION OF CITATIONS
SEARCH DETAIL