Anemia among pediatric critical care survivors: Prevalence and resolution

To determine the incidence of anemia among pediatric critical care survivors and to determine whether it resolves within 6 months of discharge. Design. A prospective observational study. Patients with anemia upon discharge from the pediatric critical care unit (PCCU) underwent in hospital and post hospital discharge followup (4-6 months) for hemoglobin (Hb) levels. Setting. A medical-surgical PCCU in a tertiary care center. Patients. Patients aged 28 days to 18 years who were treated in the PCCU for over 24 hours. Measurements and Main Results. 94 (24%) out of 392 eligible patients were anemic at time of discharge. Patients with anemia were older, median 8.0 yrs [(IQR 1.0-14.4) versus 3.2 yrs (IQR 0.65-9.9) (P \u3c 0.001)], and had higher PeLOD [median 11 (IQR 10-12) versus 1.5 (1-4) (P \u3c 0.001)], and PRISM [median 5 (IQR 2-11) versus 3 (IQR 0-6) (P \u3c 0.001)] scores. The Hb level normalized in 32% of patients before discharge from hospital. Of the 28 patients who completed followup, all had normalization of their Hb in the absence of medical intervention. Conclusions. Anemia is not common among patients discharged from the PCCU and recovers spontaneously within 4-6 months. © 2013 Quang N. Ngo et al

Desarrollo de Reactores Basados en Películas de Materiales Mesoporosos para la Destrucción De Nitratos Disueltos en Agua

Se sintetizaron y estudiaron films mesoporosos de TiO2 para la eliminación fotocatalítica de nitratos disueltos en agua. Los filmes se prepararon sobre sustratos de vidrio, combinando reacciones sol - gel y Autoensamblado Inducido por Evaporación y se caracterizaron estructuralmente por diversas técnicas. Se estudió el efecto del grosor, de la introducción de nanopartículas de plata y del dopaje con bismuto en la ca pacidad fotocatalítica. Los films más efectivos para realizar fotocatálisis y eliminar nitratos fueron aquellos a los cuales se introdujeron nanopartículas de plata, los cuales poseen una capacidad de eliminar nitratos de alrededor de 7,2 ppm/cm2 h.Mesoporous TiO2 films for the photocatalytic elimination of nitrates dissolved in water were synthesized and studied. The films were prepared on glass substrates by combining sol-gel reactions and evaporation-induced self-assembly and they were characterized structurally by various techniques. The effect of thickness, the introduction of nanoparticles of silver and bismuth doping on the photocatalytic ability were studied. The most effective films for photocatalysis and remove nitrates were those which were made of silver nanoparticles, which have a capacity to remove nitrates from about 7.2 ppm/cm2h.Fil: Zambrano, S. M.. Comisión Nacional de Energía Atómica; ArgentinaFil: Zelcer, A.. Comisión Nacional de Energía Atómica; ArgentinaFil: Bellino, Martin Gonzalo. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Desarrollo de Reactores Basados en Películas de Materiales Mesoporosos para la Destrucción De Nitratos Disueltos en Agua

Se sintetizaron y estudiaron films mesoporosos de TiO2 para la eliminación fotocatalítica de nitratos disueltos en agua. Los filmes se prepararon sobre sustratos de vidrio, combinando reacciones sol - gel y Autoensamblado Inducido por Evaporación y se caracterizaron estructuralmente por diversas técnicas. Se estudió el efecto del grosor, de la introducción de nanopartículas de plata y del dopaje con bismuto en la ca pacidad fotocatalítica. Los films más efectivos para realizar fotocatálisis y eliminar nitratos fueron aquellos a los cuales se introdujeron nanopartículas de plata, los cuales poseen una capacidad de eliminar nitratos de alrededor de 7,2 ppm/cm2 h.Mesoporous TiO2 films for the photocatalytic elimination of nitrates dissolved in water were synthesized and studied. The films were prepared on glass substrates by combining sol-gel reactions and evaporation-induced self-assembly and they were characterized structurally by various techniques. The effect of thickness, the introduction of nanoparticles of silver and bismuth doping on the photocatalytic ability were studied. The most effective films for photocatalysis and remove nitrates were those which were made of silver nanoparticles, which have a capacity to remove nitrates from about 7.2 ppm/cm2h.Fil: Zambrano, S. M.. Comisión Nacional de Energía Atómica; ArgentinaFil: Zelcer, A.. Comisión Nacional de Energía Atómica; ArgentinaFil: Bellino, Martin Gonzalo. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Tri-ponderal mass index in survivors of childhood brain tumors: A cross-sectional study.

Survivors of childhood brain tumors (SCBT) face a higher risk of cardiometabolic disorders and premature mortality compared to the general population. Excess adiposity is a known risk factor for these comorbidities. However, while SCBT have higher adiposity compared to healthy controls, measuring adiposity in clinical practice involves access to specialized equipment and may impact busy clinical services. Tri-ponderal Mass Index (TMI; kg/

Birth Weight and Body Mass Index Z-Score in Childhood Brain Tumors: A Cross-Sectional Study

Children with brain tumors (CBT) are at higher risk of cardiovascular disease and type 2 diabetes compared to the general population, in which birth weight is a risk factor for these diseases. However, this is not known in CBT. The primary aim of this study was to explore the association between birth weight and body mass measures in CBT, compared to non-cancer controls. This is a secondary data analysis using cross-sectional data from the CanDECIDE study (n = 78 CBT and n = 133 non-cancer controls). Age, sex, and birth weight (grams) were self-reported, and confirmed through examination of the medical records. Body mass index (BMI) was calculated from height and weight measures and reported as kg/m. BMI z-scores were obtained for subjects under the age of 20 years. Multivariable linear regression was used to evaluate the relationship between birth weight and BMI and BMI z-score, adjusted for age, sex, puberty, and fat mass percentage. Higher birth weight was associated with higher BMI and BMI z-score among CBT and controls. In conclusion, birth weight is a risk factor for higher body mass during childhood in CBT, and this may help the identification of children at risk of future obesity and cardiometabolic risk

Circulating leptin levels are associated with adiposity in survivors of childhood brain tumors.

Survivors of Childhood Brain Tumors (SCBT) are at a higher risk of developing cardiovascular disease and type 2 diabetes compared to the general population. Adiposity is an important risk factor for the development of these outcomes, and identifying biomarkers of adiposity may help the stratification of survivors based on their cardiovascular risk or allow for early screening and interventions to improve cardiometabolic outcomes. Leptin is an adipokine that positively correlates with the adipose mass in the general population and is a predictor of adverse cardiometabolic outcomes, yet its association with adiposity in SCBT has not been studied. The aim of this study was to determine if leptin levels are associated with the adipose mass in SCBT, and to define its predictors. This cross-sectional study included 74 SCBT (n = 32 females) with 126 non-cancer controls (n = 59 females). Total adiposity was measured using Bioelectrical Impendence Analysis (BIA) and central adiposity was measured using waist-to-hip ratio (WHR) and waist-to-height ratio (WHtR). We used multivariable linear regression analysis to determine if leptin predicts adiposity in SCBT and adjusted for age, sex, puberty, and cancer status. Leptin correlated strongly with total (p \u3c 0.001) and central (WHR p = 0.001; WHtR p \u3c 0.001) adiposity in SCBT and non-cancer controls. In conclusion, leptin is a potential biomarker for adiposity in SCBT, and further investigation is needed to clarify if leptin is a predictor of future cardiometabolic risk in SCBT

Growth and Branching of Gold nanoparticles Through MesoporousSilica Thin Films

Composite materials made of mesoporous oxide thin films containing metallic nanoparticles are of high interest in various fields, including catalysis, biosensing and non-linear optics. We demonstrate in this work the fabrication of such composite materials containing a sub-monolayer of gold nanoparticles (GNPs) of various shapes covered with mesoporous silica thin films. Additionally, the shape of the GNPs (and thus their optical properties) can be modified in situ through seeded growth and branching. Such growth proceeds upon wetting with HAuCl 4 solution, a surfactant (cetyltrimethylammonium bromide, CTAB) and a mild reducing agent (ascorbic acid, AA). The effect of varying several reaction parameters (time and CTAB and AA concentrations) was evaluated, showing that more anisotropic particles are obtained at longer reaction times, lower CTAB concentration and higher AA concentration. The final shape of the GNPs was also found to depend on their initial shape and size, as well as the pore size of the mesoporous film covering them. Because the growth proceeds through the pores of the film, it may lead to shapes that are not easily obtained in solution, such as particles with branches on one side only. Finally, we have confirmed that no damage was induced to the mesoporous silica structure during the growth process and thus the final particles remain well covered by the thin film, which can eventually be used as a filter between the GNPs and the outer medium.Fil: Angelomé, Paula C.. Universidad de Vigo; EspañaFil: Pastoriza Santos, Isabel. Universidad de Vigo; EspañaFil: Pérez Juste, Jorge. Universidad de Vigo; EspañaFil: Rodríguez-González, Benito. Universidad de Vigo; EspañaFil: Zelcer, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología; ArgentinaFil: Soler Illia, Galo Juan de Avila Arturo. Universidad de Buenos Aires; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Liz Marzán, Luis M.. Universidad de Vigo; Españ

High molecular weight adiponectin levels are inversely associated with adiposity in pediatric brain tumor survivors.

While children with brain tumors are surviving at record rates, survivors are at risk of cardiovascular disease and type 2 diabetes mellitus; these conditions may be driven by excess body fat. Adiponectin in an adipokine that is inversely associated with the fat mass, and has been linked to cardiometabolic risk stratification in the general population. However, adiponectin\u27s profile and determinants in SCBT have not been established. We tested the hypothesis that high molecular weight (HMW) adiponectin levels, the more biologically active form of adiponectin, were associated with adiposity in SCBT similarly to non-cancer controls. Seventy-four SCBT (n = 32 female) and 126 controls (n = 59 female) who were 5-17 years old were included. Partial correlations and multivariable regression analyses assessed the relationship between HMW adiponectin and adiposity. HMW adiponectin was inversely associated with total and central adiposity (FM%: β - 0.21, 95% CI - 0.15, - 0.08; p value \u3c 0.0001; WHR: β - 0.14, 95% CI - 0.02, - 0.01; p value \u3c 0.0001 ;WHtR: β - 0.21, 95% CI - 0.05, - 0.03; p value \u3c 0.0001). In conclusion, HMW adiponectin is inversely correlated with adiposity in SCBT. Adiponectin may serve as a biomarker of cardiometabolic risk and response to interventions to prevent and manage obesity and its comorbidities in SCBT

Adiposity in childhood brain tumors: A report from the Canadian Study of determinants of endometabolic health in children (CanDECIDE Study)

Children with brain tumors (CBT) are at high risk of cardiovascular diseases and type 2 diabetes compared to the general population. Recently, adiposity has been reported to be more informative for cardiometabolic risk stratification than body mass index (BMI) in the general population. The goal of this study is to describe the adiposity phenotype in CBT, and to establish adiposity determinants. We recruited CBT (n = 56) and non-cancer controls (n = 106). Percent body fat (%FM), waist-to-hip ratio (WHR) and waist-to-height ratio (WHtR) were measured to determine total and central adiposity, respectively. Regression analyses were used to evaluate adiposity determinants. CBT had higher total and central adiposity compared to non-cancer controls despite having similar BMI measurements. Those with tumors at the supratentorial region had increased total and central adiposity, while those who received radiotherapy had increased total adiposity. In conclusion, CBT have increased total and central adiposity in the presence of similar BMI levels when compared to non-cancer controls. Adiposity, especially central adiposity, is a potential cardiometabolic risk factor present relatively early in life in CBT. Defining interventions to target adiposity may improve long-term outcomes by preventing cardiometabolic disorders in CBT