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1.
Encephale ; 42(5): 426-433, 2016 Oct.
Artículo en Francés | MEDLINE | ID: mdl-27017318

RESUMEN

OBJECTIVE: The Binge Eating Scale is a widely used scale to assess binge eating disorder in obese patients. Until now, this scale has not been validated on a French population, and no psychometrically sound tool assesses binge eating disorder in the French. This study aimed to test the psychometric properties of a French version of the Binge Eating Scale by establishing its factor structure, internal consistency, and construct validity in both a non-clinical population and a clinical population (obese patients who are candidates for bariatric surgery). METHODS: A total of 553 non-clinical subjects and 63 morbidly obese patients who were candidates for bariatric surgery were assessed with the BES and the Bulimic Investigatory Test, Edinburgh or BITE (which assesses both binge eating behaviours and use of inappropriate compensatory behaviours). We tested the factor structure of the instrument, its internal consistency, its construct validity with measures of binge eating, and its construct validity with measures of inappropriate compensatory behaviours to avoid weight gain. In 47 out of the 63 obese patients, we assessed binge eating disorder (SCID). RESULTS: In the non-clinical population, the BES had a one-factor structure (which accounted for 61% of the variance), excellent internal consistency (α=0.93), and high construct validity with measures of binge eating. In this population, construct validity with measures of inappropriate compensatory behaviours was confirmed in overweight and obese subjects (P=0.42), but not in underweight and optimal weight subjects (P<0.001). In obese patients candidates for bariatric surgery, we demonstrated that the BES had a one-factor structure (which accounted for 46% of the variance), had high internal consistency (α=0.88) and high construct validity with measures of binge eating and good construct validity with measures of inappropriate compensatory behaviours to avoid weight gain. In the subpopulation of 47 obese patients, sensitivity, specificity, positive predictive value and negative predictive value were respectively 75%, 88.4%, 37.5% and 97.4% (BES threshold=18). DISCUSSION: In this study, we validated a psychometrically sound French version of the Binge Eating Scale, both in a non-clinical and a clinical sample. The psychometric properties of the French version of the BES are comparable to its original version with a one-factor structure. The BES is a useful tool to assess binge eating disorder in obese patients (e.g., bariatric surgery candidates), but might not differentiate between binge eating disorder and bulimia nervosa in underweight and optimal weight subjects.


Asunto(s)
Trastorno por Atracón/diagnóstico , Pruebas Neuropsicológicas , Adulto , Cirugía Bariátrica , Trastorno por Atracón/psicología , Bulimia/diagnóstico , Bulimia/psicología , Femenino , Francia , Voluntarios Sanos , Humanos , Lenguaje , Masculino , Persona de Mediana Edad , Obesidad/psicología , Obesidad/cirugía , Obesidad Mórbida/psicología , Obesidad Mórbida/cirugía , Psicometría , Reproducibilidad de los Resultados
2.
Br J Cancer ; 101(12): 1978-85, 2009 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-19920822

RESUMEN

BACKGROUND: Breast cancer becomes lethal when visceral metastases develop. At this stage, anti-cancer treatments aim at relieving symptoms and delaying death without resulting in additional toxicity. On the basis of their differential anti-oxidant defence level, tumour cells can be made more sensitive to chemotherapy than non-tumour cells when membrane lipids are enriched with docosahexaenoic acid (DHA), a peroxidisable and oxidative-stress-inducing lipid of marine origin. METHODS: This open-label single-arm phase II study evaluated the safety and efficacy (response rate), as primary end points, of the addition of 1.8 g DHA daily to an anthracycline-based chemotherapy (FEC) regimen in breast cancer patients (n = 25) with rapidly progressing visceral metastases. The secondary end points were time to progression (TTP) and overall survival (OS). RESULTS: The objective response rate was 44%. With a mean follow-up time of 31 months (range 2-96 months), the median TTP was 6 months. Median OS was 22 months and reached 34 months in the sub-population of patients (n = 12) with the highest plasma DHA incorporation. The most common grade 3 or 4 toxicity was neutropaenia (80%). CONCLUSION: DHA during chemotherapy was devoid of adverse side effects and can improve the outcome of chemotherapy when highly incorporated. DHA has a potential to specifically chemosensitise tumours.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias de la Mama/tratamiento farmacológico , Ácidos Docosahexaenoicos/administración & dosificación , Adulto , Anciano , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/patología , Ácidos Docosahexaenoicos/efectos adversos , Ácidos Docosahexaenoicos/sangre , Femenino , Humanos , Persona de Mediana Edad , Metástasis de la Neoplasia , Resultado del Tratamiento
4.
Biochim Biophys Acta ; 1345(2): 151-61, 1997 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-9106494

RESUMEN

The uptake kinetics of alpha-linolenic acid (18:3(n - 3)), an essential fatty acid, were investigated in the human intestinal cell line Caco-2. Four clones (PD10, PF11, PD7 and TC7) from the heterogeneous parental Caco-2 cells population were used. After a screening step using isolated cells, the TC7 clone was selected for the study of alpha-linolenic acid uptake. [1-(14)C]linolenic acid dissolved in 10 mM taurocholate was presented to the microvillus plasma membrane (apical side) of TC7 differentiated cells, grown on a semi-permeable polycarbonate membrane. The results show that the initial rate of uptake is not a linear function of the 18:3(n- 3) monomer concentration in the incubation medium. In the monomer concentration range studied (0.2 to 36 microM) apical uptake was saturable and followed Michaelis-Menten kinetics (V(max) = 15.4 +/- 0.6 nmol/mg protein per min, K(m) = 14.3 +/- 1.3 microM). In addition, it was temperature- and energy-dependent but was apparently unaffected by the sodium gradient and intracellular metabolic fate of 18:3(n - 3). Excess of unlabeled saturated or unsaturated long chain fatty acids (C16 to C22) led to a 27-68% reduction of [1-(14)C]linolenic acid uptake. Likewise basolateral uptake was saturable (V(max) = 4.9 +/- 0.7 nmol/mg protein per min, K(m) = 8.7 +/- 2.9 microM). These facts argue in favour of the existence in these human intestinal cells of a carrier-mediated transport system for alpha-linolenic acid and probably other long chain fatty acids as well.


Asunto(s)
Adenocarcinoma/metabolismo , Neoplasias del Colon/metabolismo , Mucosa Intestinal/metabolismo , Lípidos/biosíntesis , Ácido alfa-Linolénico/metabolismo , Antimetabolitos/farmacología , Células CACO-2 , Radioisótopos de Carbono , División Celular/fisiología , Células Clonales , Desoxiglucosa/farmacología , Inhibidores Enzimáticos/farmacología , Ácidos Grasos/metabolismo , Glucosa/metabolismo , Humanos , Intestinos/citología , Ionóforos/farmacología , Cinética , Monensina/farmacología , Oligomicinas/farmacología , Concentración Osmolar , Serina Endopeptidasas/metabolismo , Especificidad por Sustrato , Temperatura , Factores de Tiempo , Ácido alfa-Linolénico/análisis
5.
Diabetes Metab ; 31(1): 69-77, 2005 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-15803116

RESUMEN

OBJECTIVES: The present study examines the kinetic of plasma triacylglycerol (TAG) after sequential ingestion of lunch and dinner as well as the contribution of dietary fat ingested at lunch to subsequent post-dinner TAG composition. METHOD: Six healthy subjects were included. After standardized breakfast (7: 30AM), 2 mixed meals with fat loads composed of 44 g olive oil (rich in oleic acid) at lunch (12PM) and 44 g sunflower oil (rich in linoleic acid) at dinner (7PM) were ingested. [1-13C] palmitate was added in lunch only. Plasma TAG and chylomicron-TAG (CMTAG) levels were measured sequentially after meals. [1-13C] palmitate enrichment and concentrations of oleic acid and linoleic acid were measured in all lipid fractions. RESULT: Post-dinner plasma TAG peak was delayed as compared to lunch (3 hours vs 1 hour, p=0.002) whereas the magnitude of the postprandial peaks was not significantly different between lunch and dinner (2.4+/-0.3 vs 2.0+/-0.4 mmol/L, p=0.85). [1-13C] palmitate enrichment was maximal 5 hours after lunch in all lipid fractions and decreased slowly thereafter. After dinner ingestion, the rate of decline of [1-13C] palmitate enrichment plateaued during the first 60 minutes. Oleic acid increased slightly and immediately after dinner and remained the predominant fatty acid in all lipid fractions during the first hour after dinner. A delayed peak of plasma and CM-TAG was observed after dinner as compared to lunch without difference in the magnitude of peaks. CONCLUSION: The contribution of dietary fat ingested at lunch to post-dinner lipemia is confirmed despite the relatively long lasting interval between the 2 meals (7 h) and the absence of any early peak of plasma TAG after dinner.


Asunto(s)
Grasas de la Dieta , Periodo Posprandial , Triglicéridos/sangre , Adulto , Ritmo Circadiano , Humanos , Masculino , Aceite de Oliva , Aceites de Plantas , Valores de Referencia , Aceite de Girasol
6.
Diabetes Care ; 8(4): 323-8, 1985.
Artículo en Inglés | MEDLINE | ID: mdl-4042797

RESUMEN

In a retrospective study, we compared the prevalence of retinopathy in two groups of 88 diabetic patients (84 men, 4 women) with either diabetes mellitus secondary to chronic pancreatitis (CP-DM group) or idiopathic diabetes mellitus (I-DM group). The patients of these two groups were pair-matched according to age (48.7 +/- 1.1 versus 48.8 +/- 1.0 yr in CP-DM and I-DM groups, respectively; mean +/- SEM), sex, duration of diabetes (7.96 +/- 0.56 versus 8.08 +/- 0.8 yr) and therapy (80 on insulin and 8 on oral hypoglycemic agents in each group). Retinopathy was assessed by bilateral ophthalmoscopic examination of the fundus after pupillary dilation in all 176 patients and by fluorescein angiography in 47 patients with CP-DM and 35 patients with I-DM. Forty-one percent of patients in the CP-DM group and 45.5% of patients in the I-DM group had diabetic retinopathy (P greater than 0.5). In each group, patients with retinopathy were older than patients without retinopathy (51.6 +/- 1.3 versus 46.7 +/- 1.8 yr in the CP-DM group, P less than 0.01, and 52.1 +/- 1.5 versus 46.0 +/- 1.2 yr in the ID-M group, P less than 0.01). They had diabetes of longer duration (10.9 +/- 1.0 versus 5.9 +/- 0.6 yr in the CP-DM group, P less than 0.001, and 10.5 +/- 1.0 versus 6.0 +/- 0.6 yr in the ID-M group, P less than 0.001). The prevalence of retinopathy increased parallel to the duration of diabetes in a similar way in both groups.(ABSTRACT TRUNCATED AT 250 WORDS)


Asunto(s)
Retinopatía Diabética/epidemiología , Pancreatitis/complicaciones , Adulto , Anciano , Presión Sanguínea , Diabetes Mellitus/etiología , Diabetes Mellitus/fisiopatología , Retinopatía Diabética/etiología , Retinopatía Diabética/fisiopatología , Femenino , Francia , Humanos , Masculino , Persona de Mediana Edad , Pancreatectomía , Pancreatitis/fisiopatología , Pancreatitis/cirugía , Estudios Retrospectivos , Factores de Tiempo
7.
Am J Clin Nutr ; 58(5): 653-9, 1993 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-8237871

RESUMEN

The relationships between essential fatty acid (EFA) composition of colostrum, mature milk, and white adipose tissue (WAT) were examined on days 5 and 30 postpartum in 24 healthy French mothers. Fatty acid composition was assessed by capillary gas chromatography. In WAT, the proportion of individual polyunsaturated fatty acids (PUFAs) did not change during lactation and was greater (18:2n-6) or lower (18:3n-3, long-chain PUFAs) than values found in colostrum or mature milk (P < 0.04). The 18:2n-6 content and the ratio of 18:3n-3 to 18:2n-6 correlated between WAT and colostrum (r = 0.52 and r = 0.57, respectively) or mature milk (r = 0.64 and r = 0.65, respectively). These relationships agree with an expected qualitative effect of WAT fatty acid composition on interindividual variability of milk parent EFA content. The decrease in the long-chain PUFA content observed from colostrum to mature milk and the concomitant occurrence of a precursor-product relationship between the linoleate and its long-chain PUFA are consistent with the mobilization of a preformed long-chain PUFA pool during early lactation.


Asunto(s)
Tejido Adiposo/química , Ácidos Grasos Esenciales/análisis , Lactancia/metabolismo , Leche Humana/química , Adulto , Femenino , Humanos , Factores de Tiempo
8.
Am J Clin Nutr ; 48(4): 1035-40, 1988 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-3048076

RESUMEN

Twelve young healthy adults (five men, seven women) ingested four test meals on four occasions so we could examine the relationship between the rate of gastric emptying (GE) and the glucose response to different starchy foods. Each meal consisted of one food product containing 50 g starch: spaghetti, rice, French bread, or mashed potato. Basal and postprandial glucose and insulin responses were measured for 3 h. The foods were labeled with 3.7 MBq Tc99m-albumin and GE was studied by scintigraphy for 3 h. The rate of GE (expressed by the GE half-time) was fastest for mashed potatoes, then bread, rice, and slowest for spaghetti. Blood glucose and serum insulin responses were similar. A significant negative correlation was found between the GE half-time and the maximum variation in blood glucose level (r = -0.6, p less than 0.0001). The glucose response to all four foods is strongly related to the GE rate.


Asunto(s)
Glucemia/metabolismo , Carbohidratos de la Dieta/farmacología , Vaciamiento Gástrico/efectos de los fármacos , Insulina/sangre , Almidón/farmacología , Adulto , Femenino , Humanos , Masculino , Factores de Tiempo
9.
Am J Clin Nutr ; 54(5): 829-35, 1991 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-1951153

RESUMEN

The relationships between essential fatty acid (EFA) composition of colostrum and white adipose tissue (WAT) were examined on day 5 after delivery in 69 healthy women. Fatty acid composition was assessed by capillary gas chromatography, and 33 fatty acids were detected in colostrum and in WAT. Total polyunsaturated fatty acid (PUFA) content was similar in colostrum and in WAT (15.7 +/- 3.1% and 16.1 +/- 3.8%, respectively), but long-chain PUFA content was higher in colostrum than in WAT (2.9 +/- 0.6% and 1 +/- 0.2%, respectively; P less than 0.001). The concentrations of linoleic acid were significantly correlated between colostrum and WAT (r = 0.77, P less than 0.0001). No correlation was found for alpha-linolenic acid. The relationships between long-chain PUFA composition of colostrum and WAT suggested that individual factors along with tissue specificity of the mammary gland are involved in either the capacity of desaturating and chain-elongating pathways and/or incorporation of long-chain PUFAs into colostrum.


Asunto(s)
Tejido Adiposo/química , Calostro/química , Ácidos Grasos Esenciales/análisis , Triglicéridos/análisis , Ácidos Grasos Insaturados/análisis , Femenino , Humanos , Ácido Linoleico , Ácidos Linoleicos/análisis , Análisis de Regresión
10.
Am J Clin Nutr ; 70(2): 292-8, 1999 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-10426708

RESUMEN

BACKGROUND: Factors other than dietary fatty acids could be involved in the variability observed in blood docosahexaenoate (22:6n-3) and arachidonate (20:4n-6) status in formula-fed infants. OBJECTIVE: We considered the 22:6n-3 and 20:4n-6 status at birth to be one of these factors and studied its influence on postnatal changes in term infants fed 4 different diets. DESIGN: The blood phospholipid composition was determined at birth and on day 42 of feeding in 83 term infants fed breast milk, nonsupplemented formula, or 2 different 22:6n-3-supplemented formulas. Relations between 22:6n-3 and 20:4n-6 status at birth and their relative postnatal changes, calculated by the difference between status at the end of the feeding period (6 wk of age) and at birth, were assessed. RESULTS: Postnatal changes in the plasma and erythrocyte phospholipids 22:6n-3 and 20:4n-6 were negatively related to their respective concentrations at birth (P < 0.01) and the slopes of the regression lines were not significantly affected by the type of milk ingested. Adjusted mean values for phospholipid 22:6n-3 in nonsupplemented-formula-fed infants and for 20:4n-6 in formula-fed infants decreased significantly more than they did in the other infant groups (P < 0.02). The status at birth and the type of milk ingested explained 33-64% and 7-47%, respectively, of the variability in postnatal changes. CONCLUSIONS: The status of 22:6n-3 and 20:4n-6 at birth in term infants is one of the major determinants of postnatal changes in these fatty acids. This finding indicates that research is required to characterize environmental, genetic, or both factors, which, in addition to maternal diet, could influence fatty acid status at birth.


Asunto(s)
Ácido Araquidónico/sangre , Ácidos Docosahexaenoicos/sangre , Alimentos Infantiles , Recién Nacido/sangre , Leche Humana , Fosfolípidos/sangre , Eritrocitos/metabolismo , Femenino , Humanos , Lactante , Masculino
11.
Diabetes Metab ; 30(3): 276-9, 2004 06.
Artículo en Inglés | MEDLINE | ID: mdl-15223980

RESUMEN

Non-islet cell tumor-related hypoglycemia is a rare phenomenon. We report the case of a 63 Year-old man admitted for hemiparesia and a capillary blood glucose of 20 mg/dL. The presence of an immature form of IGF-II that can mimic the effect of insulin, namely "big IGF-II", explained this patient's hypoglycaemia. A moderately differentiated adenocarcinoma of the cardia with metastatic extension to the stomach and the liver was demonstrated. Octreotide failed to control the hypoglycaemia, therefore prednisolone (2 mg/kg per day) and enteral feeding prevented new episodes of severe hypoglycaemia.


Asunto(s)
Adenocarcinoma/diagnóstico , Glucemia/metabolismo , Hipoglucemia/etiología , Factor II del Crecimiento Similar a la Insulina/fisiología , Neoplasias Gástricas/diagnóstico , Resultado Fatal , Humanos , Masculino , Persona de Mediana Edad , Octreótido/uso terapéutico
12.
Toxicon ; 34(9): 1058-61, 1996 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-8896199

RESUMEN

Two pyrrolizidine alkaloids and one pyrrolizidine alkaloid-N-oxide were incubated with microsomal preparations from humans, rat and avocado and the product profiles examined. The alkaloids were converted to dehydroretronecine, the putative toxic metabolite, by both rat and human microsomal preparations. In addition, alkaloid-N-oxides, the major detoxication products from pyrrolizidine alkaloids, were also formed. The pyrrolizidine alkaloid-N-oxide was converted to both dehydroretronecine and the parent alkaloid. This suggests that the toxicity of pyrrolizidine alkaloid-N-oxides could be greater than suggested hitherto as a result of conversion to the toxic metabolite via the parent alkaloid. Quantitative differences in the proportions of products formed by the different microsomal preparations may be of significance in the extrapolation of toxicological data from animal models such as the rat to humans.


Asunto(s)
Antineoplásicos Fitogénicos/toxicidad , Carcinógenos/metabolismo , Microsomas Hepáticos/efectos de los fármacos , Monocrotalina/análogos & derivados , Monocrotalina/toxicidad , Alcaloides de Pirrolicidina/toxicidad , Animales , Antineoplásicos Fitogénicos/metabolismo , Biotransformación , Carcinógenos/toxicidad , Cromatografía Líquida de Alta Presión , Frutas , Humanos , Microsomas Hepáticos/metabolismo , Monocrotalina/metabolismo , Oxidación-Reducción , Alcaloides de Pirrolicidina/metabolismo , Ratas
13.
Eur J Clin Nutr ; 43(3): 187-96, 1989 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-2659314

RESUMEN

To explore the long-term metabolic effects of acarbose in man, 6 healthy men (25 +/- 2 years; BMI: 21.6 +/- 2.7) were fed a controlled diet in a metabolic ward for 7 consecutive weeks. After an initial 3-week period to ensure a metabolic steady-state, they received 300 mg/d of acarbose (100 mg before each meal) for the remaining 4 weeks. Stool and urine collections were made over 7 d on weeks 3 and 7. Faecal excretion of water, nitrogen, carbohydrate, fat, zinc, magnesium, copper, chromium, iron, calcium and phosphorus and urinary excretion of nitrogen, urea and calcium were measured. In addition, fasting and postprandial blood glucose and insulin levels, as well as fasting triglycerides, total cholesterol, apolipoproteins (Apo) A-I, A-II, and B, zinc and copper, vitamins A, B1, B2, B6, C, and E concentrations were measured before and at the end of the acarbose period. Weight, food consumption, and water balance were not modified by acarbose. Faecal nitrogen excretion increased significantly but the nitrogen balance remained positive. Faecal excretion of carbohydrate, fat, iron and chromium were significantly increased by acarbose. Apos A-I and A-II decreased significantly. Plasma levels of vitamin B6 increased and vitamin A concentrations decreased with acarbose. This study provides new insights into the metabolic effects of acarbose with respect to nitrogen, mineral and vitamin metabolism.


Asunto(s)
Metabolismo/efectos de los fármacos , Trisacáridos/farmacología , Acarbosa , Adulto , Metabolismo de los Hidratos de Carbono , Metabolismo Energético/efectos de los fármacos , Humanos , Metabolismo de los Lípidos , Masculino , Minerales/metabolismo , Nitrógeno/metabolismo , Vitaminas/sangre
14.
Eur J Clin Nutr ; 54(2): 126-35, 2000 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10694783

RESUMEN

BACKGROUND: High intakes of trans fatty acids (TFA) have been found to exert an undesirable effect on serum lipid profiles, and thus may increase the risk for cardiovascular disease. OBJECTIVES: Investigation of the association between TFA intake and serum lipids. DESIGN: Cross-sectional study in eight European countries (Finland, France, Greece, Iceland, The Netherlands, Portugal, Spain, Sweden) among 327 men and 299 women (50-65 y). Using a dietary history method, food consumption was assessed and TFA intake was calculated with recent figures on TFA levels of foods, collected in the TRANSFAIR study. RESULTS: Mean (+/-s.d.) TFA intake was 2.40+/-1.53 g/day for men and 1.98+/-1.49 g/day for women (0.87+/-0.48% and 0. 95+/-0.55% of energy, respectively), with the highest consumption in Iceland and the lowest in the Mediterranean countries. No associations were found between total TFA intake and LDL, HDL or LDL/HDL ratio after adjustment for cardiovascular risk factors. Additional adjustment for other fatty acid clusters resulted in a significant inverse trend between total TFA intake and total cholesterol (Ptrend<0.03). The most abundantly occurring TFA isomer, C18:1 t, contributed substantially to this inverse association. The TFA isomers C14:1 t9, C16:1 t9 and C22:1 t were not associated or were positively associated with LDL or total cholesterol. CONCLUSIONS: From this study we conclude that at the current European intake levels of trans fatty acids they are not associated with an unfavourable serum lipid profile. SPONSORSHIP: Unilever Research Laboratorium, the Dutch Dairy Foundation on Nutrition and Health, Cargill BV, the Institute of Food Research Norwich Laboratory, the Nutrition Branch of the Ministry of Agriculture, Fisheries and Food, the International Fishmeal and Oil Manufacturers' Association, Kraft Foods, NV Vandemoortele Coordination Center, Danone Group, McDonalds Deutschland Inc, Danish Veterinary and Food Administration, Valio Ltd, Raisio Group. European Journal of Clinical Nutrition (2000) 54, 126-135


Asunto(s)
Enfermedades Cardiovasculares/etiología , Grasas de la Dieta/administración & dosificación , Ácidos Grasos/administración & dosificación , Tejido Adiposo/química , Anciano , Colesterol/sangre , Estudios Transversales , Registros de Dieta , Ingestión de Energía , Europa (Continente) , Ácidos Grasos/análisis , Femenino , Humanos , Isomerismo , Modelos Lineales , Lípidos/sangre , Lipoproteínas HDL/sangre , Lipoproteínas LDL/sangre , Masculino , Persona de Mediana Edad , Factores de Riesgo
15.
Eur J Clin Nutr ; 53(2): 143-57, 1999 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10099948

RESUMEN

OBJECTIVE: To assess the intake of trans fatty acids (TFA) and other fatty acids in 14 Western European countries. DESIGN AND SUBJECTS: A maximum of 100 foods per country were sampled and centrally analysed. Each country calculated the intake of individual trans and other fatty acids, clusters of fatty acids and total fat in adults and/or the total population using the best available national food consumption data set. RESULTS: A wide variation was observed in the intake of total fat and (clusters) of fatty acids in absolute amounts. The variation in proportion of energy derived from total fat and from clusters of fatty acids was less. Only in Finland, Italy, Norway and Portugal total fat did provide on average less than 35% of energy intake. Saturated fatty acids (SFA) provided on average between 10% and 19% of total energy intake, with the lowest contribution in most Mediterranean countries. TFA intake ranged from 0.5% (Greece, Italy) to 2.1% (Iceland) of energy intake among men and from 0.8% (Greece) to 1.9% among women (Iceland) (1.2-6.7 g/d and 1.7-4.1 g/d, respectively). The TFA intake was lowest in Mediterranean countries (0.5-0.8 en%) but was also below 1% of energy in Finland and Germany. Moderate intakes were seen in Belgium, The Netherlands, Norway and UK and highest intake in Iceland. Trans isomers of C18:1 were the most TFA in the diet. Monounsaturated fatty acids contributed 9-12% of mean daily energy intake (except for Greece, nearly 18%) and polyunsaturated fatty acids 3-7%. CONCLUSION: The current intake of TFA in most Western European countries does not appear to be a reason for major concern. In several countries a considerable proportion of energy was derived from SFA. It would therefore be prudent to reduce intake of all cholesterol-raising fatty acids, TFA included.


Asunto(s)
Grasas de la Dieta/administración & dosificación , Ácidos Grasos/administración & dosificación , Adulto , Grasas de la Dieta/análisis , Grasas de la Dieta/clasificación , Ingestión de Energía , Europa (Continente) , Ácidos Grasos/análisis , Ácidos Grasos/clasificación , Femenino , Humanos , Masculino , Estereoisomerismo
16.
Lipids ; 29(10): 701-6, 1994 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-7861937

RESUMEN

In a previous study we showed that intestinal uptake of alpha-linolenic acid (18:3n-3) was carrier-mediated and we suggested that a plasma membrane fatty acid protein was involved in the transport of long-chain fatty acids. To further test this hypothesis, the mechanism of linoleic acid (18:2n-6) uptake by isolated intestinal cells was examined using a rapid filtration method and 20 mM sodium taurocholate as solubilizing agent. Under these experimental conditions transport of [1-14C]linoleic acid monomers in the concentration range of 2 to 2220 nM was saturable with a Vm of 5.1 +/- 0.6 nmol/mg protein/min and a Km of 183 +/- 7 nM. Experiments carried out in the presence of metabolic inhibitors, such as 2,4-dinitrophenol and antimycin A, suggested that an active, carrier-mediated mechanism was involved in the intestinal uptake of this essential fatty acid. The addition of excess unlabeled linoleic acid to the incubation medium led to a 89% decrease in the uptake of [1-14C]linoleic acid, while D-glucose did not compete for transport into the cell. Other long-chain polyunsaturated fatty acids added to the incubation mixture inhibited linoleic acid uptake by more than 80%. The presence of alpha-linolenic acid (18:3n-3) in the incubation medium caused the competitive inhibition (Ki = 353 nM) of linoleic acid uptake. The data are compatible with the hypothesis that intestinal uptake of both linoleic, and alpha-linolenic acid is mediated by a membrane carrier common to long-chain fatty acids.


Asunto(s)
Absorción Intestinal/efectos de los fármacos , Intestino Delgado/metabolismo , Ácidos Linoleicos/farmacología , Ácidos Linoleicos/farmacocinética , Ácido alfa-Linolénico/farmacología , Animales , Transporte Biológico Activo , Radioisótopos de Carbono , Células Cultivadas , Cricetinae , Medios de Cultivo , Espacio Extracelular/metabolismo , Ácidos Grasos/farmacología , Intestino Delgado/citología , Intestino Delgado/efectos de los fármacos , Líquido Intracelular/metabolismo , Cinética , Masculino , Sodio/farmacología , Solubilidad , Ácido Taurocólico/farmacología
17.
Lipids ; 28(7): 637-43, 1993 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-8355593

RESUMEN

Because triacylglycerol (TAG) structure influences the metabolic fate of its component fatty acids, we have examined human colostrum and mature milk TAG with particular attention to the location of the very long chain polyunsaturated fatty acid on the glycerol backbone. The analysis was based on the formation of various diacylglycerol species from human milk TAG upon chemical (Grignard degradation) or enzymatic degradation. The structure of the TAG was subsequently deduced from data obtained by gas chromatographic analysis of the fatty acid methyl esters in the diacylglycerol subfractions. The highly specific TAG structure observed was identical in mature milk and colostrum. The three major fatty acids (oleic, palmitic and linoleic acids) each showed a specific preference for a particular position within milk TAG: oleic acid for the sn-1 position, palmitic acid for the sn-2 position and linoleic acid for the sn-3 position. Linoleic and alpha-linolenic acids exhibited the same pattern of distribution and they were both found primarily in the sn-3 (50%) and sn-1 (30%) positions. Their longer chain analogs, arachidonic and docosahexaenoic acids, were located in the sn-2 and sn-3 positions. These results show that polyunsaturated fatty acids are distributed within the TAG molecule of human milk in a highly specific fashion, and that in the first month of lactation the maturation of the mammary gland does not affect the milk TAG structure.


Asunto(s)
Calostro/química , Ácidos Grasos/análisis , Leche Humana/química , Triglicéridos/química , Femenino , Humanos , Hidrólisis
18.
Alcohol ; 13(3): 309-14, 1996.
Artículo en Inglés | MEDLINE | ID: mdl-8734848

RESUMEN

This study examines the effect of alcohol withdrawal on lipoprotein(a) [Lp(a)] in 24 male, middle-aged chronic alcohol abusers admitted for withdrawal therapy. Serum concentration of Lp(a) was determined before and during the first 3 weeks of abstinence. The changes in three sialylated proteins [Lp(a), alpha 1-antitrypsin (alpha 1-AT), and haptoglobin (Hp)] and in desialylated transferrin (CDT) were also determined in 14 patients. After the 3 weeks of withdrawal therapy, the mean and median Lp(a) concentrations increased (p = 0.0001). The changes in Lp(a) levels were not related to the changes in dietary intake nor to the decrease in total HDL, HDL3, HDL2 cholesterol, Apo A-I, and Apo B. In the subgroup of 14 chronic alcohol abusers, Lp(a) levels increased parallel with Hp and alpha 1-AT, whereas CDT decreased. It is concluded that the impact of alcohol on sialylated proteins may be one of the mechanisms responsible for the increase in plasma Lp(a) after alcohol withdrawal.


Asunto(s)
Alcoholismo/sangre , Etanol/administración & dosificación , Lipoproteína(a)/sangre , Adulto , Alanina Transaminasa/sangre , Apolipoproteína A-I/metabolismo , Apolipoproteínas B/sangre , Aspartato Aminotransferasas/sangre , HDL-Colesterol/sangre , Humanos , Masculino , Persona de Mediana Edad , Síndrome de Abstinencia a Sustancias/sangre , gamma-Glutamiltransferasa/sangre
19.
Perit Dial Int ; 18(5): 505-11, 1998.
Artículo en Inglés | MEDLINE | ID: mdl-9848629

RESUMEN

OBJECTIVE: To explore the mechanisms and metabolic consequences of the insulin resistance of patients treated by continuous ambulatory peritoneal dialysis (CAPD). DESIGN: CAPD patients and healthy subjects ingested a similar mean oral glucose load per kilogram of fat-free mass (FFM) [1.20+/-0.03 g/(kg FFM) vs 1.20+/-0.06 g/(kg FFM); CAPD vs healthy subjects]. Substrate oxidation was monitored over 6 hours using indirect calorimetry. SETTING: Peritoneal dialysis unit of a tertiary-care institutional center. OUTCOME MEASURES: Glycemia, insulinemia, substrate oxidation. PATIENTS: Six CAPD patients (68+/-5 yr) and 6 healthy subjects (24+/-1 yr). The CAPD patients had similar body mass index (21.4+/-1.3 vs 22.9+/-1.1 kg/m2), a higher percent fat (25.8%+/-3.7% vs 16%+/-2.2%; p < 0.05), and a lower FFM (42.2+/-2.2 kg vs 56.5+/-2.6 kg; p < 0.01) than healthy subjects. RESULTS: The CAPD patients displayed a higher glycemic and insulinemic responses to glucose than did healthy subjects (p < 0.05), but similar glucose oxidation and storage. Lipid oxidation and plasma nonesterified fatty acids were not increased in CAPD patients versus healthy subjects, in spite of a higher adiposity. Fat oxidation was related to fat mass in CAPD patients (r2 = 0.77, p < 0.05) but not in healthy subjects (r2 = 0.05). CONCLUSION: CAPD patients display an insulin-resistance not explained by an increased lipid oxidation. The maintenance of intracellular glucose utilization at the expense of higher glycemic and insulinemic responses suggests a defective glucose transport.


Asunto(s)
Glucosa/farmacología , Resistencia a la Insulina/fisiología , Fallo Renal Crónico/metabolismo , Diálisis Peritoneal Ambulatoria Continua , Anciano , Calorimetría Indirecta , Estudios de Casos y Controles , Metabolismo Energético , Femenino , Glucosa/farmacocinética , Prueba de Tolerancia a la Glucosa , Humanos , Fallo Renal Crónico/terapia , Masculino , Oxidación-Reducción
20.
Gastroenterol Clin Biol ; 8(2): 116-20, 1984 Feb.
Artículo en Francés | MEDLINE | ID: mdl-6698350

RESUMEN

The case of a 75-year-old woman who had been treated for 12 years by vitamin A (250,000 UI/day) for psoriasis is presented. During the hospitalisation, hepatic cirrhosis was detected and attributed to hypervitaminosis A based on disease history, clinical hypervitaminosis A features, increased vitamin A blood values and histological patterns, i. e. perisinusoidal fibrosis and spontaneous fluorescence of lipid vacuoles within fat-storing cells. Thus, although rare, vitamin A intoxication can be responsible for cirrhosis.


Asunto(s)
Hipervitaminosis A , Cirrosis Hepática/inducido químicamente , Anciano , Femenino , Humanos , Hígado/patología , Cirrosis Hepática/diagnóstico , Cirrosis Hepática/patología , Factores de Tiempo
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