Cow's milk-based beverage consumption in 1- to 4-year-olds and allergic manifestations: an RCT

Background

Nutrients such as docosahexaenoic acid (DHA), prebiotics and β-glucan have been associated with reduced incidence of respiratory illnesses and allergic manifestations (AM). Our objective was to assess if consumption of a cow’s milk-based beverage with these and other nutrients supports respiratory, gastrointestinal, and skin health in otherwise well-nourished, healthy children.

Methods

In this double-blind, randomized, controlled trial, healthy children (1–4 years of age) from two daycare centers in Brazil were fed three servings/day of a cow’s milk-based beverage (CMBB; n = 125) containing DHA, the prebiotics polydextrose (PDX) and galactooligosaccharides (GOS), β-glucan, and other key nutrients, or a control cow’s milk-based beverage (control; n = 131) for up to 28 weeks. Occurrence of respiratory infections, diarrheal disease and AM was assessed by study pediatricians and the number of episodes were analyzed with the Cochran-Mantel-Haenszel test and the Andersen-Gill model.

Results

The CMBB group had fewer episodes of AM, which included allergic rhinitis or conjunctivitis, wheezing, allergic cough, eczema and urticaria, compared to the control group (p = 0.021). The hazard ratio for increased number of episodes of AM was lower in the CMBB group compared to control (HR, 0.64; 95 % CI 0.47–0.89; p = 0.007). There was no difference in the incidence of respiratory infections and diarrheal disease between groups.

Conclusion

A cow’s milk-based beverage containing DHA, PDX/GOS, and yeast β-glucan, and supplemented with micronutrients, including zinc, vitamin A and iron, when consumed 3 times/day for 28 weeks by healthy 1- to 4-year-old children was associated with fewer episodes of allergic manifestations in the skin and the respiratory tract.

Trial registration

registration number: NCT01431469

How Can Urban Policies Improve Air Quality and Help Mitigate Global Climate Change: a Systematic Mapping Review

Tackling climate change at the global level is central to a growing field of scientific research on topics such as environmental health, disease burden, and its resulting economic impacts. At the local level, cities constitute an important hub of atmospheric pollution due to the large amount of pollutants that they emit. As the world population shifts to urban centers, cities will increasingly concentrate more exposed populations. Yet, there is still significant progress to be made in understanding the contribution of urban pollutants other than CO2, such as vehicle emissions, to global climate change. It is therefore particularly important to study how local governments are managing urban air pollution. This paper presents an overview of local air pollution control policies and programs that aim to reduce air pollution levels in megacities. It also presents evidence measuring their efficacy. The paper argues that local air pollution policies are not only beneficial for cities but are also important for mitigating and adapting to global climate change. The results systematize several policy approaches used around the world and suggest the need for more in-depth cross-city studies with the potential to highlight best practices both locally and globally. Finally, it calls for the inclusion of a more human rights-based approach as a mean of guaranteeing of clean air for all and reducing factors that exacerbate climate change.

Urbanização, globalização e saúde

O artigo discute interfaces entre conceitos de saúde urbana e de qualidade ambiental, apresentando bases conceituais e enfocando elementos que compõem a qualidade ambiental urbana como fator determinante de saúde. A seguir, enfoca as relações entre globalização e urbanização mundial e apresenta o caso emblemático da urbanização brasileira e algumas de suas características mais marcantes, que têm consequências importantes na saúde urbana: espraiamento urbano, (des) economias de aglomeração e efeitos da virtualidade globalizada

Percepção de risco: um campo de interesse para a interface ambiente, saúde e sustentabilidade

Neste artigo, os autores discutem o complexo campo da percepção, em particular da percepção de risco, a partir de um ensaio de natureza teórica e metodológica que busca destacar a sua relevância em pesquisas que dialogam com a interface ambiente, saúde e sustentabilidade. Reconhecendo que fatores sociais e culturais influenciam direta e indiretamente as percepções que os indivíduos têm sobre diferentes riscos, os autores sinalizam que estudos nesse campo podem evidenciar os interesses, os valores e os pontos de conflitos existentes nas arenas e oferecer insights que ajudariam os tomadores de decisão a aperfeiçoar processos decisórios com maior envolvimento da sociedade. Para além da percepção de risco, o artigo discute também exemplos de investigações conduzidas pelos autores com enfoque sobre percepção ambiental. Buscando uma perspectiva crítica para tratar o tema, reconhecem a necessidade de compreender nos processos ambientais e em contextos sociais a configuração dos riscos socioambientais e suas percepções.

Characterisation of particulate matter on airborne pollen grains

A characterization of the physical-chemical composition of the atmospheric PM adsorbed to airborne pollen was performed. Airborne pollen was sampled using a Hirst-type volumetric spore sampler and observed using a Field Emission Electron Probe Microanalyser for PM analysis. A secondary electron image was taken of each pollen grain and EDS spectra were obtained for individually adsorbed particles. All images were analysed and the size parameters of the particles adsorbed to pollen was determined. The measured particles' equivalent diameter varied between 0.1 and 25.8 μm, mostly in the fine fraction. The dominant particulates identified were Si-rich, Organic-rich, SO-rich, Metals & Oxides and Cl-rich. Significant daily differences were observed in the physical-chemical characteristics of particles adsorbed to the airborne pollen wall. These differences were correlated with weather parameters and atmospheric PM concentration. Airborne pollen has the ability to adsorb fine particles that may enhance its allergenicity.

Geospatial analysis applied to epidemiological studies of dengue: a systematic review

A systematic review of the geospatial analysis methods used in the dengue fever studies published between January 2001 and March 2011 was undertaken. In accordance with specific selection criteria thirty-five studies were selected for inclusion in the review. The aim was to assess the types of spatial methods that have been used to analyze dengue transmission. We found twenty-one different methods that had been used in dengue fever epidemiological studies in that period, three of which were most frequently used. The results show that few articles had applied spatial analysis methods in dengue fever studies; however, whenever they were applied they contributed to a better understanding of dengue fever geospatial diffusion.

Free-trade agreements: challenges for global health

In this study new free-trade agreements are discussed, which are based on the breaking down of tariff and technical barriers and normally exclude most of the poorest countries in the world. Considering the current context of economic globalization and its health impacts, seven controversial points of these treaties and their possible implications for global public health are presented, mainly regarding health equity and other health determinants. Finally, this research proposes a greater social and health professionals participation in the formulation and discussion of these treaties, and a deeper insertion of Brazil in this important international agenda.

Saúde e Sociedade: parceria e abertura para novas abordagens

Resumo O texto relata a trajetória do periódico científico Saúde e Sociedade, editado desde 1992 pela Faculdade de Saúde Pública da Universidade de São Paulo em parceria com a Associação Paulista de Saúde Pública. Apresenta o contexto da época de criação do periódico, sua missão, voltada à divulgação da contribuição das Ciências Humanas e Sociais à Saúde, os principais desafios enfrentados ao longo de sua história até os dias de hoje, as metas e as estratégias para melhoria da qualidade científica, da visibilidade da revista, da indexação em diferentes bases bibliográficas nacionais e internacionais, da internacionalização e da sustentabilidade, com reafirmação de seus princípios fundantes.

Effects of CO₂ on Acer negundo pollen fertility, protein content, allergenic properties, and carbohydrates

Atmospheric gaseous pollutants can induce qualitative and quantitative changes in airborne pollen characteristics. In this work, it was investigated the effects of carbon dioxide (CO2) on Acer negundo pollen fertility, protein content, allergenic properties, and carbohydrates. Pollen was collected directly from the anthers and in vitro exposed to three CO2 levels (500, 1000, and 3000 ppm) for 6 and 24 h in an environmental chamber. Pollen fertility was determined using viability and germination assays, total soluble protein was determined with Coomassie Protein Assay Reagent, and the antigenic and allergenic properties were investigated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and immunological techniques using patients' sera. Also, pollen fructose, sucrose, and glucose values were determined. Carbon dioxide exposure affected negatively pollen fertility, total soluble protein content, and fructose content. The patient sera revealed increased IgE reactivity to proteins of A. negundo pollen exposed to increasing levels of the pollutant. No changes were detected in the SDS-PAGE protein profiles and in sucrose and glucose levels. Our results indicate that increase in atmospheric CO2 concentrations can have a negative influence of some features of A. negundo airborne pollen that can influence the reproductive processes as well as respiratory pollen allergies in the future.

Panorama da coleta seletiva com catadores no município de Maputo, Moçambique: desafıos e perspectivas

Em Maputo, a coleta seletiva ocorre de forma restrita, majoritariamente como resultado de iniciativas não governamentais ou individuais. Este estudo apresenta um panorama desses projetos e enfatiza iniciativas em parceria com o município. O objetivo foi analisar experiências de coleta seletiva de resíduos sólidos domiciliares em parcerias com organizações de catadores em Maputo, Moçambique, a fim de avaliar suas perspectivas. Foram realizadas pesquisas bibliográficas e documentais e entrevistas qualitativas semiestruturadas com: representante da Direção Municipal de Saúde e Salubridade do Município de Maputo; coordenadores administrativos de quatro organizações de catadores (Recicla, Fertiliza, Amor e Pagalata). Além disso, foram feitas visitas técnicas aos galpões/usinas de triagem e estações de coleta dessas organizações. As iniciativas, embora, em conjunto, desviem menos de 1% dos resíduos sólidos urbanos produzidos no município, foram avaliadas positivamente em aspectos de formação de capital social e econômico. A pesquisa também demonstrou que um problema para a coleta seletiva e a reciclagem em Moçambique é a carência de um mercado local e um parque reciclador que utilize e transforme materiais recicláveis em produtos reciclados. Nesse sentido, faz-se necessário definir um marco legal de serviço municipal de coleta seletiva com a participação dos catadores e munícipes.

Molecular and computational analyses of genes involved in mannose 6-phosphate independent trafficking

The newly-synthesized lysosomal enzymes travel to the trans-Golgi network (TGN) and are then driven to the acidic organelle. While the best-known pathway for TGN-to-endosome transport is the delivery of soluble hydrolases by the M6P receptors (MPRs), additional pathways do exist, as showed by the identification of two alternative receptors: LIMP-2, implicated in the delivery of β-glucocerebrosidase; and sortilin, involved in the transport of the sphingolipid activator proteins prosaposin and GM2AP, acid sphingomyelinase and cathepsins D and H. Disruption of the intracellular transport and delivery pathways to the lysosomes may result in lysosomal dysfunction, predictably leading to a range of clinical manifestations of lysosomal storage diseases. However, for a great percentage of patients presenting such manifestations, no condition is successfully diagnosed. To analyse if, in this group, phenotypes could be determined by impairments in the known M6P-independent receptors, we screened the genes that encode for LIMP-2 and sortilin. No pathogenic mutations were identified. Other approaches will be needed to clarify whether sortilin dysfunction may cause disease.

Global mass spectrometry and transcriptomics array based drug profiling provides novel insight into glucosamine induced endoplasmic reticulum stress

We investigated the molecular effects of glucosamine supplements, a popular and safe alternative to nonsteroidal anti-inflammatory drugs, for decreasing pain, inflammation, and maintaining healthy joints. Numerous studies have reported an array of molecular effects after glucosamine treatment. We questioned whether the differences in the effects observed in previous studies were associated with the focus on a specific subproteome or with the use of specific cell lines or tissues. To address this question, global mass spectrometry- and transcription array-based glucosamine drug profiling was performed on malignant cell lines from different stages of lymphocyte development. We combined global label-free MS-based protein quantitation with an open search for modifications to obtain the best possible proteome coverage. Our data were largely consistent with previous studies in a variety of cellular models. We mainly observed glucosamine induced O-GlcNAcylation/O-GalNAcylation (O-HexNAcylation); however, we also observed global and local changes in acetylation, methylation, and phosphorylation. For example, our data provides two additional examples of "yin-yang" between phosphorylation and O-HexNAcylation. Furthermore, we mapped novel O-HexNAc sites on GLU2B and calnexin. GLU2B and calnexin are known to be located in the endoplasmic reticulum (ER) and involved in protein folding and quality control. The O-HexNAc sites were regulated by glucosamine treatment and correlated with the up-regulation of the ER stress marker GRP78. The occupancy of O-HexNAc on GLU2B and calnexin sites differed between the cytosolic and nuclear fractions with a higher occupancy in the cytosolic fraction. Based on our data we propose the hypothesis that O-HexNAc either inactivates calnexin and/or targets it to the cytosolic fraction. Further, we hypothesize that O-HexNAcylation induced by glucosamine treatment enhances protein trafficking.

Saúde ambiental no campo: o caso dos projetos de desenvolvimento sustentável em assentamentos rurais do Estado de São Paulo

No Brasil, algumas iniciativas voltadas ao desenvolvimento rural sustentável vêm sendo implementadas no âmbito de assentamentos rurais. A pesquisa teve como objetivo levantar os problemas de saúde ambiental em assentamentos tradicionais e em assentamentos de desenvolvimento sustentável, visando compreender como são percebidos os problemas de saúde ambiental enfrentados por parte de populações de assentados rurais que constituem alvo de políticas públicas inspiradas em princípios de desenvolvimento sustentável. Estudo de casos explanatório e descritivo, abordando quatro “projetos de desenvolvimento sustentável” e dois convencionais em assentamentos rurais das regiões Central e Nordeste do Estado de São Paulo e desenvolvido, de modo comparativo, mediante oficinas de trabalho discutindo aspectos de saúde ambiental. O trabalho de coleta de informações foi iniciado após prévia aprovação do Comitê de Ética em Pesquisa. Os assentados nos dois tipos de assentamento indicaram problemas de saúde ambiental similares, relacionados, sobretudo, à falta de saneamento básico, manejo inadequado de resíduos, dificuldades no controle de pragas e problemas de saúde do trabalhador. Há um grande distanciamento entre o discurso propositivo de algumas políticas públicas inspiradas nos princípios da sustentabilidade e a realização objetiva de sua prática, sobretudo na incorporação da dimensão dos aspectos de saúde pública. Todavia, no caso dos projetos de desenvolvimento sustentável em assentamentos rurais no Estado de São Paulo, tal dissociação não se manifesta no âmbito de percepção dos sujeitos, público-alvo dos projetos. Para estes a construção de um modo de vida sustentável não pode prescindir da atenção primária aos aspectos de saúde ambiental como fator de desenvolvimento humano.

Saúde Global em tempos de globalização

O presente artigo apresenta definições, conceitos e princípios do campo de conhecimentos e práticas conhecido como “Saúde Global”, baseando-se em seu desenvolvimento histórico e em seu contexto contemporâneo, marcado pelo fenômeno da globalização. Mostra a evolução do conceito de saúde internacional para o de Saúde Global. A globalização econômica, que está aliada à globalização política, cultural, informacional e comunicativa, traz novas oportunidades e desafios, cujos benefícios e impactos adversos, que envolvem todas as dimensões das relações humanas, ainda carecem de análises compreensivas. Processos de interdependência planetária trazem benefícios e riscos para a saúde humana, de forma diferenciada ao redor do globo. Discute o que são problemas de Saúde Global no século XXI, caracterizado por problemas de saúde acumulados, problemas novos e problemas decorrentes de mudanças de paradigmas. Propõe uma agenda de pesquisa em Saúde Global para o presente e futuro próximo, exemplificando temas em três linhas principais: a distribuição desigual das doenças e agravos da saúde ao redor do mundo; os impactos das mudanças ambientais globais na saúde humana e formas de mitigação e adaptação; e políticas, instituições e sistemas de Saúde Global.

Changes in the IgE-reacting protein profiles of Acer negundo, Platanus x acerifolia and Quercus robur pollen in response to ozone treatment

This study aims to investigate the effects of O3 in protein content and immunoglobulin E (IgE)-binding profiles of Acer negundo, Platanus x acerifolia and Quercus robur pollen. Pollen was exposed to O3 in an environmental chamber, at half, equal and four times the limit value for the human health protection in Europe. Pollen total soluble protein was determined with Coomassie Protein Assay Reagent, and the antigenic and allergenic properties were investigated by SDS-PAGE and immunological techniques using patients' sera. O3 exposure affected total soluble protein content and some protein species within the SDS-PAGE protein profiles. Most of the sera revealed increased IgE reactivity to proteins of A. negundo and Q. robur pollen exposed to the pollutant compared with the non-exposed one, while the opposite was observed in P. x acerifolia pollen. So, the modifications seem to be species dependent, but do not necessarily imply that increase allergenicity would occur in atopic individuals.

Identification of Plantago lanceolata pollen allergens using an immunoproteomic approach

BACKGROUND

Airborne Plantago pollen triggers respiratory allergies in Mediterranean countries.

OBJECTIVES

We aimed to study sensitization in patients with seasonal respiratory allergy and identify proteins of Plantago lanceolata pollen that could be responsible for hypersensitivity reactions in sensitized patients. We also determined the airborne pollen concentration of Plantago species from 2004 to 2011.

METHODS

IgE-binding proteins were analyzed and characterized using 1D and 2D gel electrophoresis and immunoblotting with sera from individuals sensitized to P lanceolata pollen extracts, mass spectrometry analysis, and protein data mining. We used aerobiological methods to study airborne pollen.

RESULTS

P lanceolata pollen accounts for 3% of the annual pollen spectrum in the air of Porto. Of a total of 372 patients, 115 (31%) showed specific IgE levels to P lanceolata pollen extracts. All sera from P lanceolata-allergic patients recognized 8 prominent groups of IgE-reactive allergens. Separation of proteins using 2D gel electrophoresis followed by identification with mass spectrometry revealed the presence of other IgE-reactive components that could be involved in sensitization.

CONCLUSIONS

We detected proteins in P lanceolata pollen extracts that, to our knowledge, have not yet been studied and could worsen sensitization to this weed pollen species. The proteins identified were involved in a variety of cellular functions. By applying 2D electrophoresis and immunoblotting with a pool of 2 sera from different P lanceolata-allergic patients, we obtained a more detailed characterization of the P lanceolata allergen profile.