Résumé
Folic acid supplementation is an integral aspect of the management of children with sickle cell anaemia (SCA) especially in Africa. In spite of this, there have been concerns about lower folate levels, especially during crisis. AimTo determine red cell folate levels of children with sickle cell anaemia in steady state and during crisis and compare with those with haemoglobin AA genotype. Method This study was prospective, hospital based, and comparative. Fifty children with sickle cell anaemia were recruited during crises and followed up until they met the criteria for attaining steady state. The controls were fifty children matched with those with SCA for age and gender and had haemoglobin AA genotype. Red cell folate estimation was done with the Electrochemiluminescence Immunoassay (ECLIA) method using the automated Roche Cobas e411 equipment. Results The median (IQR) red cell folate level in children during sickle cell crisis was 265.95 (134.50) ng/ml, which was significantly lower than the median (IQR) of 376.30 (206.85) ng/ml obtained during steady state. Most children with SCA (41 out of 50) had significantly higher folate levels during steady state (T=1081, Z-score= -4.660, p < 0.001). Median level of red cell folate was lower during anaemic crisis compared to vaso-occlusive crisis, though not significantly so (N(50), U = 214.00, Z-score= -1.077, p = 0.305). The median red cell folate level of normal controls was 343.55 (92.90) ng/ml, which was significantly lower than the 376.30 (206.85) ng/ml obtained during steady state (N(50), U= 209.00, Z-score= -7.177, p <0.001). Conclusion Median red cell folate levels of the study participants were within normal limits, though most children with SCA had significantly higher levels during steady state compared to crisis. Normal controls had significantly lower red cell folate levels than the children with SCA during steady state
Sujets)
Imagerie par résonance magnétique , Anémie de Blackfan-Diamond , Acide folique , Drépanocytose , Crises convulsives fébrilesRésumé
Folate is an essential nutrient because mammals lack biological activity to synthesize. It different factors generate folate deficiency. Recent studies have identified that the C677T variant of the enzyme methylene tetrahydrofolate reductase (MTHFR), can play a role in serum folate concentrations (SFC) and red cell folate (RCF). The aim of this rewiev was to actualice some generalities of folate metabolism, factors related to its deficiency, biochemical indicators used to assess the nutritional status of folate and role of the C677T polymorphism of the MTHFR enzyme on the cycle of folate and methionine. It is necessary to design studies with representative samples corroborating the effect of polymorphisms on biochemical indicators of nutritional status of folate and determine the dose-response effect and contribute to modify the nutritional recommendations with the necessary scientific evidence.
El 62% de la población chilena presenta sobrepeso (dato OMS). Publicar calorías en menús de restaurantes podría ayudar a controlar este problema. El objetivo fue estudiar el efecto de la entrega de información calórica en la elección de almuerzos típicos. La metodología tuvo un enfoque cuantitativo, con encuesta on line de diseño transversal, estructurada, con preguntas abiertas y cerradas, y con escala tipo Lykert. Se obtuvo 227 respuestas válidas. Los encuestados seleccionaron un almuerzo de 3 elementos, antes y después de exponer información calórica. Los resultados mostraron que el 49% de los encuestados reduce en promedio 292 kcal, (39,2% del total de calorías en menú) al considerar la información calórica. Nuestros resultados sugieren que aproximadamente para la mitad de los encuestados, la información fue útil en la selección de menú. Esta información podría ayudar a profesionales de la Salud a crear conciencia, facilitando a los consumidores elecciones más saludables.
Sujets)
Humains , Ration calorique , Faits Nutritionnels , Aliments , Étiquetage des aliments , Services alimentaires , Comportement de choixRésumé
Folate is an essential nutrient because mammals lack biological activity to synthesize. It different factors generate folate deficiency. Recent studies have identified that the C677T variant of the enzyme methylene tetrahydrofolate reductase (MTHFR), can play a role in serum folate concentrations (SFC) and red cell folate (RCF). The aim of this rewiev was to actualice some generalities of folate metabolism, factors related to its deficiency biochemical indicators used to assess the nutritional status of folate and role of the C677T polymorphism of the MTHFR enzyme on the cycle of folate and methionine. It is necessary to design studies with representative samples corroborating the effect of polymorphisms on biochemical indicators of nutritional status of folate and determine the dose-response effect and contribute to modify the nutritional recommendations with the necessary scientific evidence.
El folato es un nutriente esencial porque los mamíferos carecen de actividad biológica para sintetizarlo. Diferentes factores generar deficiencia de folato. Estudios recientes han identificado que la variante C677T de la enzima metilen tetrahidrofolato reductasa (MTHFR), puede jugar un papel en las concentraciones de folato sérico (FS) y eritrocitario (FE). El objetivo de este trabajo fue revisar algunas generalidades del folato, su metabolismo, los factores relacionados con su deficiencia, los indicadores bioquímicos utilizados para evaluar el estado nutricional del folato y el papel del polimorfismo C677T de la enzima MTHFR sobre el ciclo del folato y de la metionina. Es necesario diseñar estudios con muestras representativas que corroboren el efecto de los polimorfismos sobre los indicadores bioquímicos del estado nutricional del folato y determinar el efecto dosis-respuesta y así contribuir con la evidencia científica necesaria para modificar las recomendaciones nutricionales.