ABSTRACT
CONTEXT AND OBJECTIVE: Interactions between body mass index (BMI), birth weight and risk parameters may contribute to diseases rather than the individual effects of each factor. However this hypothesis needs to be confirmed. This study aimed to determine to what extent variants of lipoprotein lipase (LPL) might interact with birth weight or body weight in determining the lipid profile concentrations in children and adolescents. DESIGN AND SETTING: Substudy of the third survey of a national surveillance system (CASPIAN-III Study) in Iran. METHODS: Whole blood samples (kept frozen at -70 °C) were randomly selected from 750 students aged 10-18 years. Real-time polymerase chain reaction (PCR) and high-resolution melt analysis were performed to assess S447X (rs328), HindIII (rs320) and D9N (rs1801177) polymorphisms. RESULTS: The AG/GG genotype in D9N polymorphism was associated with higher LDL-C (low-density lipoprotein cholesterol) and lower HDL-C (high-density lipoprotein cholesterol) concentration. Significant interactions were found for D9N polymorphism and birth weight in association with plasma HDL-C concentration, and also for D9N polymorphism and BMI in association with plasma triglyceride (TG) and HDL-C levels. HindIII polymorphism had significant association with birth weight for HDL-C concentration, and with BMI for TG and HDL-C levels. Significant interactions were found for S447X polymorphism and BMI in association with plasma TG and HDL-C concentrations. CONCLUSION: We found significant interactive effects from LPL polymorphisms and birth weight on HDL-C concentration, and also effects from LPL polymorphisms and BMI on TG and HDL-C concentrations.
RESUMO CONTEXTO E OBJETIVO: Interações entre índice de massa corporal (IMC), peso ao nascer e parâmetros de risco podem contribuir para doenças, em vez de efeitos individuais de cada fator. No entanto, essa hipótese precisa de confirmação. Este estudo visou determinar o quanto variantes de lipoproteína lipase (LPL) podem interagir com peso de nascimento ou peso corporal na determinação das concentrações do perfil lipídico em crianças e adolescentes. DESENHO E LOCAL: Sub-estudo da terceira pesquisa de sistema nacional de vigilância (Estudo CASPIAN-III) no Irã. MÉTODOS: Foram selecionadas aleatoriamente amostras de sangue total (mantidas congeladas a -70 °C) de 750 estudantes com idades entre 10-18 anos. Reação de polimerase em cadeia (PCR) em tempo real e análise de fusão de alta resolução foram realizados para avaliar polimorfismo de S447X (rs328), HindIII (rs320) e D9N (rs1801177). RESULTADOS: Genótipo AG/GG em polimorfismo D9N foi associado com concentração maior de LDL-C (colesterol do tipo lipoproteína de baixa densidade) e menor de HDL-C (colesterol do tipo lipoproteína de alta densidade). Interações significativas foram encontradas para polimorfismo D9N e peso ao nascer em associação com concentração plasmática de HDL-C, bem como para polimorfismo D9N e IMC em associação com níveis plasmáticos de triglicérides (TG) e HDL-C. Polimorfismo HindIII teve associação significativa com peso de nascimento para concentração de HDL-C, e com IMC para níveis de TG e HDL-C. Interações significativas foram encontradas para polimorfismo S447X e IMC em associação com concentrações plasmáticas de TG e HDL-C. CONCLUSÃO: Encontramos efeitos interativos significativos de polimorfismo LPL e peso de nascimento sobre concentração de HDL-C, bem como efeitos de polimorfismos LPL e IMC sobre concentrações de TG e HDL-C.
Subject(s)
Humans , Male , Female , Child , Adolescent , Polymorphism, Genetic , Birth Weight/physiology , Body Mass Index , Lipids/blood , Lipoprotein Lipase/genetics , Triglycerides/blood , Genotype , Lipoprotein Lipase/blood , Lipoproteins, HDL , Cholesterol, HDL/blood , Cholesterol, LDL/blood , Obesity/bloodABSTRACT
Introdução: as doenças cardiovasculares acometem milhares de pessoas no mundo. Destas, a doença arterosclerótica está entre as de maior morbimortalidade. Para a avaliação da necessidade de intervenções hemodinâmicas e/ou revascularização miocárdica, há a necessidade da realização do cateterismo (CATE), procedimento de imagem indicado para evidenciar pontos de obstrução e determinar a melhor estratégia cirúrgica. Para a realização do CATE utiliza-se heparina sódica (5000 UI) in bolus. Atualmente, sabe-se que a heparina interfere no remodelamento de partículas lipoproteicas por liberação da lipoproteína lipase (LPL) e da lipase hepática (LH), essa ação pode alterar o transporte reverso do colesterol (TRC), em função de modificações no metabolismo das lipoproteínas. Métodos: foram selecionados por conveniência 20 pacientes, 10 do sexo masculino e 10 do sexo feminino, ambos os sexos, entre 45 e 73 anos, admitidos no Hospital Ana Neri, submetidos à cineangiocoronariografia (CATE)...
Introduction: cardiovascular diseases affect thousands of people worldwide. Of these, the atherosclerotic disease is one of the most morbidity and mortality. To evaluate the need for hemodynamic interventions and / or CABG, the catheterization (CATE) is performed, an imaging procedure to evidence obstruction and to determine the best surgical strategy. To perform CATE, is necessary to use in bolus sodium heparin (5000 IU). Currently, it is known that heparin interferes with the remodeling of the lipoprotein particles by releasing lipoprotein lipase (LPL) and hepatic lipase (HL), this action may alter the reverse cholesterol transport (TRC), by changes in lipoprotein metabolism. Methods: were selected by convenience 20 patients, 10 male and 10 female, both gender, between 45 and 73 years old, admitted to the Hospital Ana Neri, who underwent coronary angiography (CATE)...
Subject(s)
Humans , Cardiovascular Diseases/complications , Cardiovascular Diseases/diagnosis , Cardiovascular Diseases/pathology , Lipoprotein Lipase/administration & dosage , Lipoprotein Lipase/adverse effects , Lipoprotein Lipase/immunology , Lipoprotein Lipase/blood , Lipoproteins, HDL/administration & dosage , Lipoproteins, HDL/analysis , Lipoproteins, HDL/bloodABSTRACT
Development of cardiovascular diseases (CVD) has been linked with changes to the lipid profile that can be observed during the postprandial period, a phenomenon known as postprandial lipemia (PL). Physical exercise is currently the number one non-pharmacological intervention employed for prevention and reduction of risk factors for the development of CVD. This in turn has created a growing interest in the effects of physical exercise on regulation and equilibrium of lipid metabolism. In this review we compare the results of studies that have investigated the beneficial effects of strength training on PL. We analyzed articles identified in the PubMed, Scopus and EBSCO databases published from 1975 to 2013 in international journals. Studies were selected for review if they covered at least two of four keywords. The results of these studies lead to the conclusion that strength training is effective for reduction of postprandial lipemia because it increases baseline energy expenditure. This type of training can be prescribed as an important element in strategies to treat chronic diseases, such as atherosclerosis...
O desenvolvimento de doenças cardiovasculares (DCV) tem sido associado a alterações no perfil lipídico encontradas no período pós-prandial, fenômeno conhecido como lipemia pós-prandial (PL). O exercício fisico é atualmente a principal intervenção não farmacológica utilizada na prevenção e na redução de fatores de risco para o desenvolvimento de DCV. Por esta razão, há um interesse crescente acerca dos efeitos do exercício físico sobre a regulação e o equilíbrio do metabolismo lipídico. Nesta revisão, procuramos comparar os resultados de artigos que abordaram os efeitos benéficos do treinamento de força sobre a PL. Utilizamos artigos que foram selecionados nas bases de dados PubMed, Scopus e EBSCO, no período entre os anos 1975 e 2013, e publicados em revistas internacionais. Os estudos selecionados foram aqueles que contemplassem pelo menos duas das quatro palavras-chave do estudo. Com base nos estudos selecionados, conclui-se que o treinamento de força revela-se eficaz na redução da lipemia pós-prandial por induzir uma melhoria da demanda de energia basal. Este tipo de treinamento pode ser indicado como uma estratégia importante para o tratamento de doenças crônicas, como a aterosclerose...
Subject(s)
Humans , Atherosclerosis/prevention & control , Cardiovascular Diseases/prevention & control , Plaque, Atherosclerotic , Endurance Training/methods , Chronic Disease/prevention & control , Exercise/physiology , Lipoprotein Lipase/blood , Lipids/blood , Lipoproteins/blood , Risk Factors , Triglycerides/bloodABSTRACT
It was found that B-CLL patients with unmutated immunoglobulin heavy chain variable region [IgVH] have poor prognosis and clinical outcome. The difficulty of performing the mutation status of IgHV in the routine diagnostic workup of B-CLL patients, prompts the search for surrogate markers particularly gene expression profile in B-CLL cells. To investigate the role of LPL and ZAP-70 expression in assessment of prognosis and survival in a group of B-CLL patients and correlate the results with other prognostic variables. The study included 47 B-CLL patients who were subjected to clinical staging which was done by Binet and Rai scoring systems. The expression of LPL and ZAP-70 was measured by real-time quantitative PCR [RQ-PCR] and flow-cytometric analysis respectively. The patients were followed over 24 months for proper estimation of treatment free survival [TFS] and disease free survival [DPS]. The results of our study showed positive LPL and ZAP-70 expression in 46.8% and 48.9% of B-CLL patients respectively. There was significant correlation between LPL and ZAP-70 positive expression in our patients [p<0.0001]. The positive expression of both genes is associated with advance in clinical staging with significant correlation between LPL and ZAP-70 positive expression and shortening of the TFS and DPS and subsequent classification of most of the LPL+ and ZAP-70+ cases as patients with poor prognosis. Our study showed that expression of LPL and ZAP-70 has a significant role in determining the prognosis in B-CLL patients, being positive expression of LPL and ZAP-70 is associated with poor prognosis with shortening of TFS and DPS. Also, both genes expression is of great value in selection of B-CLL patients in early clinical stages that are in need to start chemotherapy to avoid progression to aggressive forms of the disease
Subject(s)
Humans , Male , Female , Gene Expression , Lipoprotein Lipase/blood , ZAP-70 Protein-Tyrosine Kinase/blood , PrognosisABSTRACT
Lipoprotein lipase (LPL) is known to be attached to the luminal surface of vascular endothelial cells in a complex with membrane-bound heparan sulfate, and released into blood stream by heparin. LPL that catalyzes hydrolysis of triglyceride (TGL) on chylomicron and VLDL into two fatty acids and monoacylglycerol, is also implicated to participate in an enhancement of cholesterol uptake by arterial endothelial cells in vitro. But little is known about the LPL-mediated cholesterol uptake in physiological state. In this study, changes in blood lipid composition and levels of lipoproteins were determined after the injection of heparin in human. The level of LPL in plasma was increased from 0 to 11 mU/ml within 30-40 min post-heparin administration and decreased to the basal level within 2 h. The level of TGL in plasma decreased from 70 mg/dl to 20 mg/dl within 1 h and gradually increased to 80 mg/dl within 4 h. However the level of total cholesterol in plasma remained at 140 mg/dl during an experimental period of 4 h. Analysis of Lipoproteins in plasma by NaBr density gradient ultracentrifugation showed that the level of VLDL decreased from 50 mg/dl to 10 mg/dl within 1-2 h and returned to normal plasm level at 4 h. However there were no significant changes in the level of LDL and HDL. These results suggest that, at least, in normo-lipidemic subjects, increased free plasm LPL acts primarily on VLDL and failed to show any significant uptake of cholesterol-rich lipoproteins in human.
Subject(s)
Adult , Humans , Cholesterol/blood , Heparin/pharmacology , Heparin/administration & dosage , Immunoblotting , Lipoprotein Lipase/blood , Lipoproteins/blood , Lipoproteins, HDL/blood , Lipoproteins, LDL/blood , Lipoproteins, VLDL/blood , Triglycerides/bloodABSTRACT
A single high fat meal diet (66 gm fat) was given to 30 healthy males and 20 male patients of ischaemic heart disease (IHD). Ten minutes prior to the 4th postprandial hour, 500 units of heparin--a lipoprotein lipase (LPL) activator--was given, and its effect seen on serum triglyceride (STG) levels observed. Besides higher fasting STG levels, the decline in 4 hour post-prandial STG level was significantly lower in patients of IHD. One explanation for higher fasting STG values and prolonged postprandial lipaemia in these subjects could be deficient LPL activity.