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1.
Atherosclerosis ; 269: 50-56, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29274507

RESUMO

BACKGROUND AND AIMS: Endothelial dysfunction (ED) plays a key role in the development of atherosclerotic cardiovascular disease (ASCVD). Likewise, type 2 diabetes (T2D) is a major CVD risk factor. Therefore, our objective was to explore whether long-term consumption of a Mediterranean diet (MedDiet) rich in olive oil or a low-fat diet (LF diet) was associated with an improvement in ED and whether the potential benefits were similar in patients with or without T2D in the CORDIOPREV clinical trial (NCT00924937). METHODS: Endothelial function was measured in 805 participants who had completed follow-up ultrasound image studies, using ultrasonography of brachial artery to calculate flow mediated vasodilatation (FMD) before and after 1.5 years of intervention with a MedDiet [35% of calories from fat (22% monounsaturated) and 50% from carbohydrates] and LF diet [28% fat (12% monounsaturated) and 55% of calories from carbohydrates]. We categorized participants as patients with T2D, prediabetes, and without T2D according to the American Diabetes Association (ADA) criteria. RESULTS: MedDiet increased FMD in patients with T2D [5.2 ± 0.4 at 1.5 years vs. 3.8 ± 0.4 at baseline; p=0.04] and prediabetes [4.9 ± 0.4 vs. 3.8 ± 0.4; p=0.04] and induced an improvement in FMD compared to LF diet in patients with diabetes [5.2 ± 0.4 (MedDiet) vs.3.7 ± 0.4 (LF diet); p=0.01]; whereas both diets maintained FMD stable in patients without diabetes. CONCLUSIONS: Habitual consumption of a MedDiet rich in extra virgin olive oil improves endothelial function in patients with prediabetes and diabetes. This takes great importance given that diet must be the cornerstone of treatment of patients with diabetes at high cardiovascular risk.


Assuntos
Artéria Braquial/fisiopatologia , Doenças Cardiovasculares/prevenção & controle , Diabetes Mellitus Tipo 2/dietoterapia , Dieta com Restrição de Gorduras , Dieta Saudável , Dieta Mediterrânea , Endotélio Vascular/fisiopatologia , Estado Pré-Diabético/dietoterapia , Vasodilatação , Artéria Braquial/diagnóstico por imagem , Doenças Cardiovasculares/diagnóstico por imagem , Doenças Cardiovasculares/fisiopatologia , Diabetes Mellitus Tipo 2/diagnóstico por imagem , Diabetes Mellitus Tipo 2/fisiopatologia , Endotélio Vascular/diagnóstico por imagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Azeite de Oliva/administração & dosagem , Estado Pré-Diabético/diagnóstico por imagem , Estado Pré-Diabético/fisiopatologia , Estudos Prospectivos , Fatores de Proteção , Recuperação de Função Fisiológica , Fatores de Risco , Método Simples-Cego , Espanha , Fatores de Tempo , Resultado do Tratamento , Ultrassonografia
2.
Am Heart J ; 177: 42-50, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-27297848

RESUMO

Coronary heart disease (CHD) represents a major global health burden. However, despite the well-known influence that dietary habits exert over the progression of this disease, there are no well-established and scientifically sound dietary approaches to prevent the onset of clinical outcomes in secondary prevention. The objective of the CORonary Diet Intervention with Olive oil and cardiovascular PREVention study (CORDIOPREV study, clinical trials number NCT00924937) is to compare the ability of a Mediterranean diet rich in virgin olive oil versus a low-fat diet to influence the composite incidence of cardiovascular events after 7 years in subjects with documented CHD at baseline. For this purpose, we enrolled 1,002 coronary patients from Spain. Baseline assessment (2009-2012) included detailed interviews and measurements to assess dietary, social, and biological variables. Results of baseline characteristics: The CORDIOPREV study in Spain describes a population with a high body mass index (37.2% overweight and 56.3% obesity) and with a median of low-density lipoprotein cholesterol of 88.5 mg/dL (70.6% of the patients having <100 mg/dL and 20.3% patients <70 mg/dL). A total of 9.6% of the participants were active smokers, and 64.4% were former smokers. Metabolic syndrome was present in 58% of this population. To sum up, we describe here the rationale, methods, and baseline characteristics of the CORDIOPREV study, which will test for the first time the efficacy of a Mediterranean diet rich in extra virgin olive oil as compared with a low-fat diet on the incidence of CHD recurrence in a long-term follow-up study.


Assuntos
Doenças Cardiovasculares/mortalidade , Doença das Coronárias/dietoterapia , Dieta com Restrição de Gorduras , Dieta Mediterrânea , LDL-Colesterol/sangue , Comorbidade , Doença das Coronárias/sangue , Doença das Coronárias/epidemiologia , Feminino , Humanos , Incidência , Masculino , Síndrome Metabólica/sangue , Síndrome Metabólica/epidemiologia , Pessoa de Meia-Idade , Infarto do Miocárdio/epidemiologia , Revascularização Miocárdica , Obesidade/sangue , Obesidade/epidemiologia , Azeite de Oliva , Sobrepeso/sangue , Sobrepeso/epidemiologia , Doença Arterial Periférica/epidemiologia , Prevenção Secundária , Método Simples-Cego , Acidente Vascular Cerebral/epidemiologia , Resultado do Tratamento
4.
PLoS One ; 11(4): e0153096, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27064675

RESUMO

BACKGROUND: Recent data suggest that the presence of associated metabolic abnormalities may be important modifiers of the association of obesity with a poorer prognosis in coronary heart disease. We determined the influence of isolated overweight and obesity on carotid intima media thickness (IMT-CC), and also assessed whether this influence was determined by the presence of metabolic abnormalities. METHODS: 1002 participants from the CordioPrev study were studied at entry. We determined their metabolic phenotypes and performed carotid ultrasound assessment. We evaluated the influence of obesity, overweight and metabolic phenotypes on the IMT-CC. RESULTS: Metabolically sick participants (defined by the presence of two or more metabolic abnormalities) showed a greater IMT-CC than metabolically healthy individuals (p = 4 * 10(-6)). Overweight and normal weight patients who were metabolically healthy showed a lower IMT-CC than the metabolically abnormal groups (all p<0.05). When we evaluated only body weight (without considering metabolic phenotypes), overweight or obese patients did not differ significantly from normal-weight patients in their IMT-CC (p = 0.077). However, obesity was a determinant of IMT-CC when compared to the composite group of normal weight and overweight patients (all not obese). CONCLUSIONS: In coronary patients, a metabolically abnormal phenotype is associated with a greater IMT-CC, and may be linked to a higher risk of suffering new cardiovascular events. The protection conferred in the IMT-CC by the absence of metabolic abnormality may be blunted by the presence of obesity. TRIAL REGISTRATION: ClinicalTrials.gov NCT00924937.


Assuntos
Doenças das Artérias Carótidas/etiologia , Doença da Artéria Coronariana/complicações , Doenças Metabólicas/fisiopatologia , Obesidade/fisiopatologia , Sobrepeso/fisiopatologia , Adulto , Idoso , Índice de Massa Corporal , Peso Corporal , Espessura Intima-Media Carotídea , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos , Fatores de Risco , Adulto Jovem
6.
Antioxid Redox Signal ; 23(7): 597-612, 2015 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-25714483

RESUMO

AIMS: Obesity is characterized by a low-grade systemic inflammatory state and adipose tissue (AT) dysfunction, which predispose individuals to the development of insulin resistance (IR) and metabolic disease. However, a subset of obese individuals, referred to as metabolically healthy obese (MHO) individuals, are protected from obesity-associated metabolic abnormalities. Here, we aim at identifying molecular factors and pathways in adipocytes that are responsible for the progression from the insulin-sensitive to the insulin-resistant, metabolically unhealthy obese (MUHO) phenotype. RESULTS: Proteomic analysis of paired samples of adipocytes from subcutaneous (SC) and omental (OM) human AT revealed that both types of cells are altered in the MUHO state. Specifically, the glutathione redox cycle and other antioxidant defense systems as well as the protein-folding machinery were dysregulated and endoplasmic reticulum stress was increased in adipocytes from IR subjects. Moreover, proteasome activity was also compromised in adipocytes of MUHO individuals, which was associated with enhanced accumulation of oxidized and ubiquitinated proteins in these cells. Proteasome activity was also impaired in adipocytes of diet-induced obese mice and in 3T3-L1 adipocytes exposed to palmitate. In line with these data, proteasome inhibition significantly impaired insulin signaling in 3T3-L1 adipocytes. INNOVATION: This study provides the first evidence of the occurrence of protein homeostasis deregulation in adipocytes in human obesity, which, together with oxidative damage, interferes with insulin signaling in these cells. CONCLUSION: Our results suggest that proteasomal dysfunction and impaired proteostasis in adipocytes, resulting from protein oxidation and/or misfolding, constitute major pathogenic mechanisms in the development of IR in obesity.


Assuntos
Adipócitos/patologia , Resistência à Insulina , Obesidade Metabolicamente Benigna/fisiopatologia , Estresse Oxidativo , Complexo de Endopeptidases do Proteassoma/metabolismo , Células 3T3-L1 , Adipócitos/metabolismo , Adulto , Animais , Modelos Animais de Doenças , Estresse do Retículo Endoplasmático , Feminino , Regulação da Expressão Gênica , Humanos , Masculino , Camundongos , Obesidade Metabolicamente Benigna/metabolismo , Obesidade Metabolicamente Benigna/patologia , Omento/citologia , Omento/metabolismo , Omento/patologia , Ácido Palmítico/farmacologia , Proteômica/métodos , Gordura Subcutânea/metabolismo , Gordura Subcutânea/patologia , Resposta a Proteínas não Dobradas
7.
J Gerontol A Biol Sci Med Sci ; 70(1): 78-84, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24986061

RESUMO

BACKGROUND: Characterization of the variations in the metabolomic profiles of elderly people is a necessary step to understand changes associated with aging. This study assessed whether diets with different fat quality and supplementation with coenzyme Q10 (CoQ) affect the metabolomic profile in urine analyzed by proton nuclear magnetic resonance spectroscopy from elderly people. METHODS: Ten participants received, in a cross-over design, four isocaloric diets for 4-week periods each: Mediterranean diet supplemented with CoQ (Med + CoQ diet); Mediterranean diet; Western diet rich in saturated fat diet; low-fat, high-carbohydrate diet enriched in n-3 polyunsaturated fat. RESULTS: Multivariate analysis showed differences between diets when comparing Med + CoQ diet and saturated fat diet, with greater hippurate urine levels after Med + CoQ diet and higher phenylacetylglycine levels after saturated fat diet in women. Following consumption of Med + CoQ, hippurate excretion was positively correlated with CoQ and ß-carotene plasma levels and inversely related to Nrf2, thioredoxin, superoxide dismutase 1, and gp91(phox) subunit of NADPH oxidase gene expression. After saturated fat diet consumption, phenylacetylglycine excretion was inversely related to CoQ plasma level and positively correlated with isoprostanes urinary level. CONCLUSIONS: The association between hippurate excretion and antioxidant biomarkers along with the relationship between phenylacetylglycine excretion and oxidant biomarkers suggests that the long-term consumption of a Med + CoQ diet could be beneficial for healthy aging and a promising challenge in the prevention of processes related to chronic oxidative stress, such as cardiovascular and neurodegenerative disease.


Assuntos
Envelhecimento/metabolismo , Dieta Mediterrânea , Ubiquinona/análogos & derivados , Idoso , Envelhecimento/genética , Antioxidantes/administração & dosagem , Biomarcadores/metabolismo , Estudos Cross-Over , Gorduras na Dieta/administração & dosagem , Suplementos Nutricionais , Feminino , Expressão Gênica , Glicina/análogos & derivados , Glicina/urina , Hipuratos/urina , Humanos , Masculino , Metabolômica , Estresse Oxidativo , Ubiquinona/administração & dosagem , beta Caroteno/sangue
8.
Eur J Clin Invest ; 44(11): 1053-64, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25231836

RESUMO

BACKGROUND: We examined the degree of postprandial triglyceride (TG) response over the day, representing a highly dynamic state, with continuous metabolic adaptations, among normal-weight, overweight and obese patients, according to their metabolically healthy or abnormal status. MATERIALS AND METHODS: A total of 1002 patients from the CORDIOPREV clinical trial (NCT00924937) were submitted to an oral fat load test meal with 0·7 g fat/kg body weight (12% saturated fatty acids (SFA), 10% polyunsaturated fatty acids (PUFA), 43% monounsaturated fatty acids (MUFA), 10% protein and 25% carbohydrates). Serial blood test analysing lipid fractions and inflammation markers (high-sensitivity C-reactive protein (hs-CRP)) were drawn at 0, 1, 2, 3 and 4 h during postprandial state. We explored the dynamic response according to six body size phenotypes: (i) normal weight, metabolically healthy; (ii) normal weight, metabolically abnormal; (iii) overweight, metabolically healthy; (iv) overweight, metabolically abnormal; (v) obese, metabolically healthy; and (vi) obese, metabolically abnormal. RESULTS: Metabolically healthy patients displayed lower postprandial response of plasma TG and large triacylglycerol-rich lipoproteins (TRLs)-TG, compared with those metabolically abnormal, independently whether or not they were obese (P < 0·001 and P < 0·001, respectively). Moreover, the area under the curve (AUC) of TG and AUC of large TRLs-TG were greater in the group of metabolically abnormal compared with the group of metabolically healthy (P < 0·001 and P < 0·001, respectively). Interestingly, metabolically abnormal subjects displayed higher postprandial response of plasma hs-CRP than did the subgroup of normal, overweight and obese, metabolically healthy patients (P < 0·001). CONCLUSIONS: Our findings showed that certain types of the metabolic phenotypes of obesity are more favourable modulating phenotypic flexibility after a dynamic fat load test, through TG metabolism and inflammation homoeostasis. To identify, these phenotypes may be the best strategy for personalized treatment of obesity.


Assuntos
Obesidade/metabolismo , Triglicerídeos/metabolismo , Adaptação Fisiológica/fisiologia , Adulto , Idoso , Glicemia/metabolismo , Pressão Sanguínea/fisiologia , Tamanho Corporal/fisiologia , Proteína C-Reativa/metabolismo , Ritmo Circadiano/fisiologia , Doença das Coronárias/dietoterapia , Doença das Coronárias/metabolismo , Dieta com Restrição de Gorduras , Dieta Mediterrânea , Gorduras na Dieta/administração & dosagem , Feminino , Homeostase/fisiologia , Humanos , Hiperlipidemias/metabolismo , Inflamação/metabolismo , Masculino , Pessoa de Meia-Idade , Obesidade/fisiopatologia , Sobrepeso/metabolismo , Sobrepeso/fisiopatologia , Fenótipo , Período Pós-Prandial/fisiologia , Estudos Prospectivos
9.
Curr Vasc Pharmacol ; 11(6): 920-7, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24168444

RESUMO

Metabolic Syndrome (MetS) is a complex disorder defined by the aggregation of interconnected cardiometabolic risk factors which increase the risk of diabetes mellitus type 2 and cardiovascular disease (CVD). MetS is currently a matter of concern and it will continue to be in the future, since there is likely to be a dramatic increase in its prevalence, and subjects with MetS will have an increased risk of mortality, mainly through CVD. Moreover, the implications on the global health burden and the worldwide epidemic of this complex disorder will impact greatly on socioeconomic cost. MetS is therefore a matter of serious concern and we need to understand its etiology in order to improve strategies of treatment and prevention. In this regard, postprandial lipemia has increased in importance over the last few years as it has been demonstrated to influence the development of atherosclerosis. In addition, in modern times, fasting is not the typical physiological state of humans; in fact, they spend most of the time in the postprandial state. However, although it is obvious that postprandial lipemia is present in conditions of obesity, little is known about the relevance of postprandial lipemia in MetS. In the current review, we will explore some aspects of postprandial lipemia which could be of interest for understanding the pathogenesis of this complex disorder and which may help us advance towards more personalized nutrition.


Assuntos
Hiperlipidemias/sangue , Hiperlipidemias/epidemiologia , Síndrome Metabólica/sangue , Síndrome Metabólica/epidemiologia , Período Pós-Prandial/fisiologia , Animais , Endotélio Vascular/metabolismo , Endotélio Vascular/patologia , Humanos , Hiperlipidemias/diagnóstico , Síndrome Metabólica/diagnóstico , Obesidade/sangue , Obesidade/diagnóstico , Obesidade/epidemiologia , Estresse Oxidativo/fisiologia , Fatores de Risco
10.
Age (Dordr) ; 35(1): 159-70, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22057896

RESUMO

Postprandial oxidative stress is characterized by an increased susceptibility of the organism towards oxidative damage after consumption of a meal rich in lipids and/or carbohydrates. We have investigated whether the quality of dietary fat alters postprandial gene expression and protein levels involved in oxidative stress and whether the supplementation with coenzyme Q(10) (CoQ) improves this situation in an elderly population. Twenty participants were randomized to receive three isocaloric diets each for 4 weeks: Mediterranean diet supplemented with CoQ (Med + CoQ diet), Mediterranean diet (Med diet), saturated fatty acid-rich diet (SFA diet). After 12-h fast, volunteers consumed a breakfast with a fat composition similar to that consumed in each of the diets. Nrf2, p22(phox) and p47(phox), superoxide dismutase 1 and 2 (SOD1 and SOD2), glutathione peroxidase 1 (GPx1), thiorredoxin reductase (TrxR) gene expression and Kelch-like ECH associating protein 1 (Keap-1) and citoplasmic and nuclear Nrf2 protein levels were determined. Med and Med + CoQ diets induced lower Nrf2, p22(phox), p47(phox), SOD1, SOD2 and TrxR gene expression and higher cytoplasmic Nrf2 and Keap-1 protein levels compared to the SFA diet. Moreover, Med + CoQ diet produced lower postprandial Nrf2 gene expression and lower nuclear Nrf2 protein levels compared to the other diets and lower GPx1 gene expression than the SFA diet. Our results support the antioxidant effect of a Med diet and that exogenous CoQ supplementation has a protective effects against free radical overgeneration through the lowering of postprandial oxidative stress modifying the postprandial antioxidant protein levels and reducing the postprandial expression of antioxidant genes in peripheral blood mononuclear cells.


Assuntos
Envelhecimento/fisiologia , Antioxidantes/metabolismo , Dieta Mediterrânea , Regulação da Expressão Gênica no Desenvolvimento , Estresse Oxidativo/genética , Período Pós-Prandial/fisiologia , Ubiquinona/análogos & derivados , Idoso , Western Blotting , Estudos Cross-Over , Suplementos Nutricionais , Jejum/fisiologia , Feminino , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases , Masculino , Estresse Oxidativo/efeitos dos fármacos , RNA/biossíntese , RNA/genética , Reação em Cadeia da Polimerase em Tempo Real , Ubiquinona/farmacologia , Vitaminas/farmacologia
11.
Atherosclerosis ; 226(1): 258-62, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23141470

RESUMO

OBJECTIVE: Postprandial lipemia influences the development of atherosclerosis. Age has been defined as a regulating factor of the extent of postprandial lipemia, but its independence of other age-associated phenotypic features, such as metabolic syndrome, has not been fully elucidated. METHODS: To investigate if age is an independent factor influencing postprandial lipemia, we compared the lipemic response to a rich fatty meal (60% fat) of 88 healthy young men (<30 years old) and 97 older participants (77 metabolic syndrome patients aged > 40; and 20 healthy people > 65) (all ApoE3/E3), at fasting state and at 2nd and 4th postprandial hours. RESULTS: We didn't find differences between the healthy young men and the healthy elderly. The metabolic syndrome patients displayed a higher postprandial TG area below the curve than the other two cohorts p < 0.001. ANOVA for repeated measurements confirmed that these differences were significant at every time-point (fasting, 2 h and 4 h). Concomitant higher responses for Large and Small TRL-carried TG and Chol were found in these metabolic syndrome patients. Interestingly, the most significant differences were found for Small-TRL-carried particles, which suggest that this fact may be mainly due to impaired lipid clearance. CONCLUSION: Metabolic syndrome may account for the differences in postprandial lipemia that have been attributed to age. In our study, there were no significant differences in postprandial lipemia between a young population (mean age 22.6 years) and a healthy people >65 years one (67.2 years) without metabolic syndrome.


Assuntos
Gorduras na Dieta/administração & dosagem , Hiperlipidemias/metabolismo , Metabolismo dos Lipídeos , Síndrome Metabólica/metabolismo , Adulto , Fatores Etários , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Período Pós-Prandial
12.
Age (Dordr) ; 34(2): 389-403, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21404051

RESUMO

Coenzyme Q10 (CoQ) is a powerful antioxidant that reduces oxidative stress. We explored whether the quality of dietary fat alters postprandial oxidative DNA damage and whether supplementation with CoQ improves antioxidant capacity by modifying the activation/stabilization of p53 in elderly subjects. In this crossover study, 20 subjects were randomly assigned to receive three isocaloric diets during 4 weeks each: (1) Mediterranean diet (Med diet), (2) Mediterranean diet supplemented with CoQ (Med+CoQ diet), and (3) saturated fatty acid-rich diet (SFA diet). Levels of mRNAs were determined for p53, p21, p53R2, and mdm2. Protein levels of p53, phosphorylated p53 (Ser20), and monoubiquitinated p53 were also measured, both in cytoplasm and nucleus. The extent of DNA damage was measured as plasma 8-OHdG. SFA diet displayed higher postprandial 8-OHdG concentrations, p53 mRNA and monoubiquitinated p53, and lower postprandial Mdm2 mRNA levels compared with Med and Med+CoQ diets (p < 0.05). Moreover, Med+CoQ diet induced a postprandial decrease of cytoplasmatic p53, nuclear p-p53 (Ser20), and nuclear and cytoplasmatic monoubiquitinated p53 protein (p < 0.05). In conclusion, Med+CoQ diet improves oxidative DNA damage in elderly subjects and reduces processes of cellular oxidation. Our results suggest a starting point for the prevention of oxidative processes associated with aging.


Assuntos
Envelhecimento/efeitos dos fármacos , Dano ao DNA/efeitos dos fármacos , Dieta Mediterrânea , Genes p53/genética , Estresse Oxidativo/fisiologia , Período Pós-Prandial/efeitos dos fármacos , Ubiquinona/análogos & derivados , Idoso , Envelhecimento/metabolismo , Western Blotting , Estudos Cross-Over , Suplementos Nutricionais , Relação Dose-Resposta a Droga , Feminino , Seguimentos , Regulação da Expressão Gênica , Genes p53/efeitos dos fármacos , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases , Masculino , Oxirredução , Período Pós-Prandial/genética , Reação em Cadeia da Polimerase em Tempo Real , Ubiquinona/administração & dosagem , Ubiquinona/farmacocinética , Vitaminas/administração & dosagem , Vitaminas/farmacocinética
13.
Age (Dordr) ; 34(6): 1309-16, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21894446

RESUMO

This paper aims to study the effects of the oxidative stress induced by quality and quantity of dietary fat on cellular senescence. Twenty elderly subjects consumed three diets, each for 4 weeks: a saturated fatty acid diet (SFA), a low-fat and high-carbohydrate diet (CHO-ALA), and a Mediterranean diet (MedDiet) enriched in monounsaturated fatty acid following a randomized crossover design. For each diet, we investigated intracellular reactive oxidative species (ROS), cellular apoptosis and telomere length in human umbilical endothelial cells incubated with serum from each patient. MedDiet induced lower intracellular ROS production, cellular apoptosis, and percentage of cell with telomere shortening, compared with the baseline and with SFA and CHO-ALA diets. Dietary fat modulates the oxidative stress in human endothelial cells. MedDiet protects these cells from oxidative stress, prevents cellular senescence and reduces cellular apoptosis.


Assuntos
Envelhecimento/fisiologia , Apoptose/fisiologia , Senescência Celular/fisiologia , Dieta Mediterrânea , Células Endoteliais da Veia Umbilical Humana/fisiologia , Estresse Oxidativo/fisiologia , Idoso , Estudos Cross-Over , Dieta com Restrição de Gorduras , Dieta Hiperlipídica , Carboidratos da Dieta/administração & dosagem , Ácidos Graxos Ômega-3/administração & dosagem , Ácidos Graxos Insaturados/administração & dosagem , Feminino , Humanos , Masculino , Espécies Reativas de Oxigênio , Homeostase do Telômero/fisiologia
14.
J Gerontol A Biol Sci Med Sci ; 67(1): 3-10, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22016358

RESUMO

We have investigated whether the quality of dietary fat and supplementation with coenzyme Q(10) (CoQ) modifies expression of genes related with inflammatory response and endoplasmic reticulum stress in elderly persons. Twenty participants received three diets for 4 weeks each: Mediterranean diet + CoQ (Med + CoQ), Mediterranean diet (Med), and saturated fatty acid-rich diet (SFA). After 12-hour fast, volunteers consumed a breakfast with a fat composition similar to that consumed in each of the diets. Med and Med + CoQ diets produced a lower fasting calreticulin, IL-1b, and JNK-1 gene expression; a lower postprandial p65, IKK-b, MMP-9, IL-1b, JNK-1, sXBP-1, and BiP/Grp78 gene expression; and a higher postprandial IkB-a gene expression compared with the SFA diet. Med + CoQ diet produced a lower postprandial decrease p65 and IKK-b gene expression compared with the other diets. Our results support the anti-inflammatory effect of Med diet and that exogenous CoQ supplementation in synergy with a Med diet modulates the inflammatory response and endoplasmic reticulum stress.


Assuntos
Dieta Mediterrânea , Suplementos Nutricionais , Estresse do Retículo Endoplasmático/efeitos dos fármacos , Inflamação/metabolismo , Ubiquinona/análogos & derivados , Idoso , Índice de Massa Corporal , Calreticulina/biossíntese , Calreticulina/genética , Estudos Cross-Over , Proteínas de Ligação a DNA/biossíntese , Proteínas de Ligação a DNA/genética , Gorduras na Dieta/metabolismo , Chaperona BiP do Retículo Endoplasmático , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Proteínas de Choque Térmico/biossíntese , Proteínas de Choque Térmico/genética , Humanos , Quinase I-kappa B/biossíntese , Quinase I-kappa B/genética , Inflamação/tratamento farmacológico , Interleucina-1beta/biossíntese , Interleucina-1beta/genética , Leucócitos Mononucleares/efeitos dos fármacos , Leucócitos Mononucleares/metabolismo , Masculino , Metaloproteinase 9 da Matriz/biossíntese , Metaloproteinase 9 da Matriz/genética , Proteína Quinase 8 Ativada por Mitógeno/biossíntese , Proteína Quinase 8 Ativada por Mitógeno/genética , Fatores de Transcrição de Fator Regulador X , Fatores de Transcrição/biossíntese , Fatores de Transcrição/genética , Ubiquinona/administração & dosagem , Ubiquinona/sangue , Ubiquinona/metabolismo
15.
Br J Nutr ; 106(4): 468-71, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21736789

RESUMO

The melanocortin-4 receptor (MC4R) is an essential regulator of food intake and energy homeostasis. Previous data suggest an influence of MC4R activity on TAG levels. Thus, the aim of the present study was to determine whether the presence of the rs12970134 polymorphism near the MC4R gene could influence postprandial lipoprotein metabolism in healthy subjects. A total of eighty-eight volunteers were selected, fifty-three homozygous for the common genotype (G/G) and thirty-five carriers for the minor A-allele (G/A and A/A). They were given a fat-rich meal containing 1 g fat and 7 mg cholesterol/kg body weight and vitamin A (60,000 IU/m(2) body surface). Fat accounted for 60 % of energy, and protein and carbohydrates accounted for 15 and 25 % of energy, respectively. Blood samples were taken at time 0, every 1 h until 6 h and every 2·5 h until 11 h. Total cholesterol and TAG in plasma, and cholesterol, TAG and retinyl palmitate in TAG-rich lipoproteins (TRL, large and small TRL) were separated by ultracentrifugation. Individuals carrying the G/G genotype displayed a higher postprandial response of plasma TAG (P = 0·033), total cholesterol (P = 0·019) and large TRL-TAG (P = 0·023) than did carriers of the minor A-allele. Furthermore, G/G subjects showed a greater postprandial response of small TRL-apoB48 than did carriers of the A-allele (P = 0·032). These results suggest that the rs12970134 polymorphism near the MC4R gene region may partly explain the inter-individual differences in postprandial lipoprotein response in healthy subjects.


Assuntos
Hipertrigliceridemia/genética , Polimorfismo de Nucleotídeo Único , Receptor Tipo 4 de Melanocortina/genética , Triglicerídeos/sangue , Adulto , Alelos , Apolipoproteína B-48/sangue , Doenças Cardiovasculares/epidemiologia , Quilomícrons/sangue , Estudos de Associação Genética , Heterozigoto , Humanos , Hipertrigliceridemia/sangue , Cinética , Lipídeos/sangue , Masculino , Período Pós-Prandial , Fatores de Risco , Espanha/epidemiologia , População Branca , Adulto Jovem
17.
Age (Dordr) ; 33(4): 579-90, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21170684

RESUMO

Postprandial oxidative stress is characterized by an increased susceptibility of the organism towards oxidative damage after consumption of a meal rich in lipids and/or carbohydrates. We have investigated whether the quality of dietary fat alters postprandial cellular oxidative stress and whether the supplementation with coenzyme Q(10) (CoQ) lowers postprandial oxidative stress in an elderly population. In this randomized crossover study, 20 participants were assigned to receive three isocaloric diets for periods of 4 week each: (1) Mediterranean diet supplemented with CoQ (Med+CoQ diet), (2) Mediterranean diet (Med diet), and (3) saturated fatty acid-rich diet (SFA diet). After a 12-h fast, the volunteers consumed a breakfast with a fat composition similar to that consumed in each of the diets. CoQ, lipid peroxides (LPO), oxidized low-density lipoprotein (oxLDL), protein carbonyl (PC), total nitrite, nitrotyrosine plasma levels, catalase, superoxide dismutase (SOD), and glutathione peroxidase (GPx) activities and ischemic reactive hyperaemia (IRH) were determined. Med diet produced a lower postprandial GPx activity and a lower decrease in total nitrite level compared to the SFA diet. Med and Med+CoQ diets induced a higher postprandial increase in IRH and a lower postprandial LPO, oxLDL, and nitrotyrosine plasma levels than the SFA diet. Moreover, the Med+CoQ diet produced a lower postprandial decrease in total nitrite and a greater decrease in PC levels compared to the other two diets and lower SOD, CAT, and GPx activities than the SFA diet.In conclusion, Med diet reduces postprandial oxidative stress by reducing processes of cellular oxidation and increases the action of the antioxidant system in elderly persons and the administration of CoQ further improves this redox balance.


Assuntos
Dieta Mediterrânea , Suplementos Nutricionais , Estresse Oxidativo , Período Pós-Prandial , Ubiquinona/análogos & derivados , Vitaminas/administração & dosagem , Idoso , Apolipoproteínas/sangue , Glicemia/análise , Estudos Cross-Over , Gorduras na Dieta/administração & dosagem , Endotélio Vascular/fisiologia , Feminino , Humanos , Insulina/sangue , Fluxometria por Laser-Doppler , Lipídeos/sangue , Masculino , Estresse Oxidativo/efeitos dos fármacos , Ubiquinona/administração & dosagem
18.
Clín. investig. arterioscler. (Ed. impr.) ; 21(1): 11-16, ene.-feb. 2009. tab, graf
Artigo em Espanhol | IBECS | ID: ibc-59944

RESUMO

Introducción. La hemostasia es un proceso complejo que regula la integridad del lecho vascular. La dieta modula la concentración de ciertos marcadores de hemostasis, aunque no está claro si el grado de resistencia a la insulina influye en esta relación. Nuestro objetivo fue investigar si la sensibilidad a la insulina influye en la concentración en ayunas y posprandial de ciertos marcadores de hemostasia (factor VII coagulante [FVIIc]), en el activador tisular del plasminógeno (tPA) y en el inhibidor del activador del plasminógeno (PAI-1), independientemente de la dieta consumida.Métodos. Estudio con diseño aleatorizado y cruzado, en el que 20 varones sanos recibieron 3 dietas, durante 4 semanas cada una, ricas en ácidos grasos monoinsaturados (Medit), saturados (Occid) e hidratos de carbono enriquecida con N3 (HC/N3). Posteriormente, se distribuyó a los participantes en 2 grupos: HOMA elevado (HE) o HOMA bajo (HB), dependiendo de las medianas para cada período de dieta. Se extrajeron determinaciones de FVIIc, tPA y PAI-1 en ayunas y 4 h después de una comida con la misma composición grasa que la seguida en el período previo, y se compararon los 2 grupos anteriores (HB frente a HE).Resultados. Hemos encontrado una concentración mayor, tanto de tPA como de PAI-1, en ayunas en el grupo HE, en relación con el grupo HB. El tPA también mostró una concentración mayor en el posprandio en el grupo HE.Conclusión. Nuestros datos indican una activación mayor de la coagulación en varones jóvenes con un índice HOMA mayor a la mediana poblacional, independientemente de la composición de la dieta seguida (AU)


Background. Haemostasis is a complex process that regulates the integrity of the circulatory system. It has been shown that diet can modulate the concentration of some haemostatic markers, but it is not clear if there is regulation of haemostasis depending on insulin sensitivity. We investigated whether insulin sensitivity influences fasting and postprandial concentration of haemostatic markers (FVIIc, PAI-1, tPA). Methods. Twenty healthy young men were submitted to three dietary intervention periods (rich in monounsaturated, saturated or n3 fatty acids) for four weeks each. The participants were separated into two groups (High-HOMA or Low-HOMA) depending on the median for the HOMA score after each period. Fasting and postprandial samples were drawn for the determination of the haemostatic markers. Results. High-HOMA group showed higher tPA and PAI-1 concentration levels in the fasting state compared with Low-HOMA group (p < 9.05). The tPA mean was also higher in the postprandial determination in the High-HOMA group. The type of diet received did not affect these results.Conclusion. In our study, the participants with higher HOMA score had a higher fasting concentration of tPA and PAI-1, and a higher postprandial concentration of tPA compared with the Low-HOMA group. These data suggest a higher activation of the coagulation cascade in healthy people with a HOMA score greater than the median for each population (AU)


Assuntos
Humanos , Hemostasia/fisiologia , Resistência à Insulina/fisiologia , Gorduras na Dieta/farmacocinética , Valores de Referência , Gorduras Insaturadas/farmacocinética , Inativadores de Plasminogênio/análise
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