Association between the density and type of trees around urban schools and exhaled nitric oxide levels in schoolchildren.

Summary: Greenspaces in school's neighbourhood represent an important environment to promote healthy development. The aim of this study was to assess the association between the density and type of trees around schools and exhaled Nitric Oxide (NO) levels in schoolchildren. Data on 845 children from 20 primary schools in Porto was analysed. Airway inflammation was assessed by measuring exhaled NO level. The density and type of trees were quantified within a 500 m buffer around schools. Associations were estimated using mixed-effect models. A significant association was observed between non-tree covered areas around schools and exhaled NO levels in schoolchildren (ß = - 1.42, 95% CI - 2.84, - 0.001). Our results suggested that the presence of trees in school neighbourhoods may play a role in the biological mechanisms underlying the complex links between environment and airway inflammation.

Early exposure to a high-fat diet has more drastic consequences on metabolism compared with exposure during adulthood in rats.

The aim of this study was determine whether the introduction of a high-fat diet during the peripubertal phase induces significant changes in body weight control, glucose homeostasis and the parasympathetic tonus compared with the administration of this diet to adult rats. High-fat diet was offered to male Wistar rats at weaning or during adulthood. A group of rats received high-fat diet for 60 days, from weaning to 81-day-old (HF81) or from 60 to 120-day-old (HF120), whereas 2 other groups received a normal-fat diet (i. e., NF81 and NF120). We analyzed adiposity, glucose homeostasis, insulin sensitivity, and vagal nerve activity. High-fat diet increased the accumulation of adipose tissue in all of the rats, but the difference was greater in the rats that were fed the high-fat diet since weaning (p<0.001). The HF rats showed glucose intolerance with high levels of insulin secretion during the glucose tolerance test (p<0.01). Rats that were fed the high-fat diet presented severe insulin resistance, indicated by a low K itt (p<0.01). Interestingly, the HF81 rats exhibited greater insulin resistance compared with the HF120 rats (p<0.05). The recordings of vagus nerve activity showed that the HF rats had higher parasympathetic activity than the NF rats irrespective of age (p<0.01). Our results show that a high-fat diet offered to rats just after weaning or in adulthood both cause impairment of glycemic homeostasis and imbalance in parasympathetic activity. Importantly, the consumption of high-fat diet immediately after weaning has more drastic consequences compared with the consumption of the same diet during adulthood.

Efeito metafilático do zinco injetável sobre parâmetros metabólicos e oxidativos de ovelhas no pós-parto imediato / Metaphylactic effect of injectable zinc on metabolic and oxidative parameters of sheep in the immediate postpartum

The aim of this study was to evaluate a new source of injectable organic zinc (zinc edetate) on the energy and oxidative profile in sheep during the immediate postpartum period. Twenty-six Texel breed animals were previously identified and divided into two experimental groups: the treated group (TG; n= 13) that comprised the animals that received a subcutaneous (SC) injection of 100 mg of zinc edetate (2 mL) fifteen days before the parturition expected date and the control group (CG; n=13) that comprised the animals that received 2mL of physiological solution at the same date of TG. Blood samples were collected on the parturition day for the assessment of serum fructosamine, cholesterol and triglycerides, insulin-like growth factor type 1 (IGF-1), the oxidative stress index (OSi) and blood zinc concentration. In addition to these parameters, the measurement of zinc was made in food given to the animals. There was no difference in metabolic parameters and OSi between the experimental groups (P>0.05), as well as in blood zinc concentrations (P>0.05). The parenteral zinc edentate does not change the energy and oxidative profile of sheep in immediate postpartum.(AU)

Fatores que afetam a razäo neutrófilos: linfócitos em novilhas Nelore / Factors affecting the neutrophyl/lymphocyte ratio in Nelore heifers

Estudou-se a razäo neutrófilos:linfócitos (R. N:L) em gado Nelore, utilizando-se seis novilhos de 3 anos de idade. Amostras de sangue foram colhidas nos dias 0 (cio), 4, 8, 12, 16 e 20 do ciclo estral, por punçäo da veia jugular, para dosagem de progesterona e de cortisol, e contagem total e diferencial de leucócitos. Foram tomadas 64 amostras, média de 1,8 ciclos estrais por novilha. Adicionalmente, foi registrada a ordem de amostragem (média = 10,66 amostras por animal, assincrônicas com o ciclo estral). Os resultados foram analisados pelo procedimento Stepwise do SAS, resultando na seguinte equaçäo: R.N:L = 0,64818 - 0,03891 D + 0,007735 D2 - 0,00030 D3 - 0,06745 P - 0,01444 O, onde D = dia do ciclo estral, P = progesterona (ng/ml) e O = ordem de amostragem (1-12). O coeficiente de determinaçäo foi de 31,59 por cento. A R. N:L foi afetada por D3 e P (P<0,01) e por O (P<0,05), sendo que P teve efeito negativo. Ä medida que aumentou O houve diminuiçäo na R. N:L. Nas primeiras colheitas e no dia do cio observou-se uma R. N:L superior a 0,50, o que seria indicativo de estresse

Estado nutricional das crianças de 0 a 6 anos na Unidade Básica de Saúde do Jardim Uniäo da Vitória - Londrina, PR / Nutritional status of children from 0 to 6 years old in the Jardim Uniäo da Vitória, Health Basic Unit - Londrina, PR

Com o objetivo de determinar o estado nutricional das crianças de 0 a 6 anos do Jardim Uniäo da Vitória, Zona Sul de Londrina, analisou-se uma amostra de 241 crianças entre 0 a 6 anos de idade atendidas na Unidade Básica de Saúde Orlando Cestari, localizada no Jardim Uniäo da Vitória. Os dados antropométricos (peso e altura) e outros obtidos através de um questionário contendo informaçöes sobre o nível de escolaridade, renda familiar, realizaçäo de pré-natal pelas mäes, uso de drogas e tabaco na gravidez, baixo peso ao nascer, ocorrência de hospitalizaçäo por infecçäo nos últimos 12 meses, foram analisados estatisticamente pelo Teste do Qui- quadrado ou Teste Exato de Fisher. Os resultos obtidos demonstraram que 33 por cento das crianças apresentam desnutriçäo. Os fatores associados na determinaçäo da desnutriçäo da populaçäo estudada foram o baixo peso ao nascer em menores de 12 meses e maior número de hospitalizaçöes por infecçäo