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https://www.readbyqxmd.com/read/28815292/concentrations-and-exposure-evaluation-of-metals-in-diverse-food-items-from-chengdu-china
#1
Rong Wang, Bifeng Zhong, Lu Pi, Fuyu Xie, Mengqin Chen, Sanglan Ding, Shijun Su, Zhi Li, Zhiwei Gan
A total of 520 food samples belonging to 29 food types and 63 drinking water were collected in Chengdu market of China in 2014 to investigate the concentrations of 11 metals, and to assess the related exposure to the local consumers by estimating the hazard quotient and carcinogenic risk (CR). The results showed that metals concentrations in drinking water were below the limit values suggested by the Ministry of Health of the People's Republic of China, and FAO/WHO (Food and Agriculture Organization of the United Nations/World Health Organization)...
August 16, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28814959/poor-sleep-is-highly-associated-with-house-dust-mite-allergic-rhinitis-in-adults-and-children
#2
Damien Leger, Bénédicte Bonnefoy, Bernard Pigearias, Bertrand de La Giclais, Antoine Chartier
BACKGROUND: Sleep disorders are often underreported to physicians by patients with allergies. This study aimed to characterize the sleep disorders associated with respiratory allergy to house dust mites (HDM) at the time of initiation of sublingual allergen immunotherapy (SLIT) in routine clinical practice. METHODS: This prospective, cross-sectional, observational study was conducted between November 2014 and March 2015 at 189 French trial sites and included 1750 participants suffering from HDM allergy who were initiating SLIT...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28814605/adam10-mediated-icos-ligand-shedding-on-b-cells-is-necessary-for-proper-t-cell-icos-regulation-and-t-follicular-helper-responses
#3
Joseph C Lownik, Andrea J Luker, Sheela R Damle, Lauren Folgosa Cooley, Riham El Sayed, Andreas Hutloff, Costantino Pitzalis, Rebecca K Martin, Mohey Eldin M El Shikh, Daniel H Conrad
The proper regulation of ICOS and ICOS ligand (ICOSL) has been shown to be essential for maintaining proper immune homeostasis. Loss of either protein results in defective humoral immunity, and overexpression of ICOS results in aberrant Ab production resembling lupus. How ICOSL is regulated in response to ICOS interaction is still unclear. We demonstrate that a disintegrin and metalloproteinase (ADAM)10 is the primary physiological sheddase of ICOSL in mice and humans. Using an in vivo system in which ADAM10 is deleted only on B cells, elevated levels of ICOSL were seen...
August 16, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28814357/association-of-aeroallergen-sensitization-and-atopic-disease-in-the-sonoran-desert
#4
Ryan D Buckley, Tara F Carr
BACKGROUND: Numerous aeroallergens have been associated with the development of asthma, including Alternaria, house-dust mite, and pet dander. Tucson, Arizona, is located in the Sonoran Desert, which has the highest diversity of vegetation of any desert in the world. Given the unique pollen profile in this region, we sought to identify the most common aeroallergens associated with rhinitis and asthma diagnosis in the local adult population. OBJECTIVE: To identify the prevalence of aeroallergen sensitivity in the Tucson adult population and to identify which aeroallergens are associated with a diagnosis of asthma...
September 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28814355/der-p-1-and-der-p-2-specific-immunoglobulin-e-measurement-for-diagnosis-of-dermatophagoides-pteronyssinus-allergy-a-systematic-review-and-meta-analysis
#5
Man Tian, Ying Zhou, Wenxin Zhang, Yubao Cui
BACKGROUND: A clinical history of allergic symptoms and a skin-prick test with house-dust mite crude extracts are standard diagnostic procedures for Dermatophagoides pteronyssinus allergy. Specific immunoglobulin E (IgE) responses to Der p 1 and Der p 2 allergens have been used for the diagnosis of D. pteronyssinus allergy; however, evaluation of the diagnostic performance of Der p 1 and Der p 2 specific IgE (sIgE) produced inconsistent findings. We sought to evaluate the diagnostic accuracy of Der p 1 sIgE and Der p 2 sIgE measurement in the diagnosis of D...
September 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28812200/dust-emission-and-dispersion-from-mineral-storage-piles
#6
Andrea Romeo, Laura Capelli, Selena Sironi, Giuseppe Nano, Renato Rota, Valentina Busini
Dust pollution is a complex problem of growing interest because of its environmental, health, economic and political impact. Environmental impact assessment methods for dust pollution management are often based on the simulation of dust dispersion, which requires a precise characterization of the source term and of the source parameters. The source term model should be as simple and as accurate as possible and requires low time consumption in order to be easily connected to a more complex algorithm for the dispersion calculations...
August 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28811323/il-22-induces-reg3%C3%AE-and-inhibits-allergic-inflammation-in-house-dust-mite-induced-asthma-models
#7
Takashi Ito, Koichi Hirose, Aiko Saku, Kenta Kono, Hiroaki Takatori, Tomohiro Tamachi, Yoshiyuki Goto, Jean-Christophe Renauld, Hiroshi Kiyono, Hiroshi Nakajima
Previous studies have shown that IL-22, one of the Th17 cell-related cytokines, plays multiple roles in regulating allergic airway inflammation caused by antigen-specific Th2 cells; however, the underlying mechanism remains unclear. Here, we show that allergic airway inflammation and Th2 and Th17 cytokine production upon intratracheal administration of house dust mite (HDM) extract, a representative allergen, were exacerbated in IL-22-deficient mice. We also found that IL-22 induces Reg3γ production from lung epithelial cells through STAT3 activation and that neutralization of Reg3γ significantly exacerbates HDM-induced eosinophilic airway inflammation and Th2 cytokine induction...
August 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28810689/temporal-trends-in-airborne-dust-concentrations-at-a-large-chrysotile-mine-and-its-asbestos-enrichment-factories-in-the-russian-federation-during-1951-2001
#8
Sara J Schonfeld, Evgeny V Kovalevskiy, Eleonora Feletto, Igor V Bukhtiyarov, Sergey V Kashanskiy, Monika Moissonier, Kurt Straif, Valerie A McCormack, Joachim Schüz, Hans Kromhout
Objectives: Mining and processing of chrysotile, an established carcinogen, has been undertaken in Asbest, Russian Federation since the late 1800s. Dust concentrations were routinely recorded at the open-pit mine and its asbestos-enrichment factories. We examined the temporal trends in these dust concentrations from 1951 to 2001. Methods: Analyses included 89290 monthly averaged gravimetric dust concentrations in six factories (1951-2001) and 1457 monthly averaged concentrations in the mine (1964-2001)...
August 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28810686/sampling-efficiency-and-performance-of-selected-thoracic-aerosol-samplers
#9
Peter Görner, Xavier Simon, Alexis Boivin, Sébastien Bau
Measurement of worker exposure to a thoracic health-related aerosol fraction is necessary in a number of occupational situations. This is the case of workplaces with atmospheres polluted by fibrous particles, such as cotton dust or asbestos, and by particles inducing irritation or bronchoconstriction such as acid mists or flour dust. Three personal and two static thoracic aerosol samplers were tested under laboratory conditions. Sampling efficiency with respect to particle aerodynamic diameter was measured in a horizontal low wind tunnel and in a vertical calm air chamber...
August 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28810150/occurrence-of-carbazoles-in-dust-and-air-samples-from-different-locations-in-germany
#10
Hermann Fromme, Wenying Mi, Thomas Lahrz, Martin Kraft, Bettina Aschenbrenner, Bianca Bruessow, Ralf Ebinghaus, Zhiyong Xie, Ludwig Fembacher
9H-carbazole is generated from incomplete combustion of diverse fossil fuels and biomass, in tobacco smoke and from industrial processes, while halogenated carbazoles have natural and anthropogenic sources. We analyzed 9H-carbazole and 14 halogenated carbazoles in dust samples from 14 schools, 13 daycare centers, and 13 residences, as well as 5 indoor air samples from residences in Munich, Germany. Overall, we present first data of various carbazoles in different indoor environments without visible combustion sources...
August 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28808779/optimisation-of-extraction-methods-and-quantification-of-benzo-a-pyrene-and-benz-a-anthracene-in-yerba-mat%C3%A3-tea-by-isotope-dilution-mass-spectrometry
#11
Ee Mei Gui, Ting Lu, Tang Lin Teo, Pui Sze Cheow, Tong Kooi Lee
A gas chromatography-isotope dilution mass spectrometry (GC-IDMS) technique was developed for the quantification of two heavy polyaromatic hydrocarbons (PAHs), benz[a]anthracene and benzo[a]pyrene, in yerba maté tea (maté). The optimisation of two extraction methods, namely liquid-liquid extraction and accelerated solvent extraction, was carried out. Both optimised methods were validated using a certified reference material of fine dust and the results were within the expanded uncertainties at 95% confidence level...
August 14, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28808416/platelet-derived-extracellular-vesicles-an-emerging-therapeutic-approach
#12
REVIEW
Shi-Cong Tao, Shang-Chun Guo, Chang-Qing Zhang
Extracellular vesicles (EVs) are a newly-discovered way by which cells communicate with their neighbors, as well as transporting cargos which once were considered to be limited by membrane barriers, including membrane proteins, cytosolic proteins and RNA. The discovery of platelet-derived EVs (P-EVs), the most abundant EVs in human blood, has been a very tortuous process. At first, P-EVs were identified as nothing but 'platelet dust', and subsequent research did not progress smoothly because of the limited research techniques to study EVs...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28806766/sublingual-immunotherapy-slit-for-house-dust-mites-does-not-prevent-new-allergen-sensitization-and-bronchial-hyper-responsiveness-in-allergic-rhinitis-children
#13
Jae Hyun Lim, Jin Youp Kim, Doo Hee Han, Chul Hee Lee, Seung-No Hong, Jee Hye Wee, Sue K Park, Chae-Seo Rhee
INTRODUCTION: The aim of this study is to identify the effects of sublingual immunotherapy (SLIT) on immunologic parameters and bronchial-hyper-responsiveness in children with allergic rhinitis to house-dust mite (HDM), through long-term follow-up cohort. METHODS: Among the Allergic Rhinitis Cohort Study for Kids, pediatric patients who visited the hospital for rhinitis symptoms and proven allergy to HDM through skin prick test were studied. In this cohort, 37 patients received SLIT more than 3-years (SLIT group), and 184 patients received only pharmacologic therapy (non-SLIT group) were included in this study...
2017: PloS One
https://www.readbyqxmd.com/read/28806260/68ga-psma-ligand-pet-ct-uptake-in-anthracosilicosis
#14
Madeleine McGuiness, Brett Sounness
This interesting image illustrates a case of biopsy-proven pulmonary anthracosilicosis, a mixed dust pneumoconiosis, associated with Ga-PSMA-ligand uptake. Prostate-specific membrane antigen (PSMA) is an emerging imaging biomarker, with clinical application in evaluation of prostate cancer using Ga-PSMA-ligand PET/CT. Contrary to its name, PSMA is expressed in a number of other normal tissues and pathological states. Prostate-specific membrane antigen expression has been linked to tumor angiogenesis in various other epithelial neoplasms, as well as neovasculature associated with tissue regeneration and repair...
August 12, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28803851/manganese-and-neurobehavioral-impairment-a-preliminary-risk-assessment
#15
Robert M Park, Shannon L Berg
Similar patterns of cognitive and motor deficits have been widely reported from manganese exposures in welding, metallurgical and chemical industry workers. A risk assessment was performed based on studies reported in the literature, extending some earlier work, and deriving new estimates of exposure response and excess risk. Many investigations of manganese neurological effects in humans have insufficient information to derive an exposure response; however, findings from a chemical manufacturer, two smelter and two welder populations permitted application of the benchmark dose procedure for continuous end-points...
August 10, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28803198/variability-of-indoor-fungal-microbiome-of-green-and-non-green-low-income-homes-in-cincinnati-ohio
#16
Kanistha Coombs, Diana Taft, Doyle V Ward, Brett J Green, Ginger L Chew, Behrouz Shamsaei, Jaroslaw Meller, Reshmi Indugula, Tiina Reponen
"Green" housing is designed to use low-impact materials, increase energy efficiency and improve occupant health. However, little is known about the indoor mycobiome of green homes. The current study is a subset of a multicenter study that aims to investigate the indoor environment of green homes and the respiratory health of asthmatic children. In the current study, the mycobiome in air, bed dust and floor dust was compared between green (study site) and non-green (control site), low-income homes in Cincinnati, Ohio...
August 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28802247/effect-of-lead-speciation-on-its-oral-bioaccessibility-in-surface-dust-and-soil-of-electronic-wastes-recycling-sites
#17
Takashi Fujimori, Masaya Taniguchi, Tetsuro Agusa, Kenji Shiota, Masaki Takaoka, Aya Yoshida, Atsushi Terazono, Florencio C Ballesteros, Hidetaka Takigami
We measured bioaccessible lead (Pb) in simulated gastrointestinal fluids containing Pb-contaminated soil or dust from electronic waste (e-waste) recycling sites to assess the risk of Pb ingestion. The physiologically based extraction test (PBET) was used as in vitro bioaccessibility assay. Pb speciation was determined using X-ray absorption spectroscopy. The total Pb concentrations in dusts (n=8) and soils (n=4) were in the range of 1630-131,000 and 239-7800mg/kg, respectively. Metallic Pb, a common component of e-waste, was ubiquitous in the samples...
August 4, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28802207/the-effect-of-aluminium-and-sodium-impurities-on-the-in-vitro-toxicity-and-pro-inflammatory-potential-of-cristobalite
#18
C Nattrass, C J Horwell, D E Damby, D Brown, V Stone
BACKGROUND: Exposure to crystalline silica (SiO2), in the form of quartz, tridymite or cristobalite, can cause respiratory diseases, such as silicosis. However, the observed toxicity and pathogenicity of crystalline silica is highly variable. This has been attributed to a number of inherent and external factors, including the presence of impurities. In cristobalite-rich dusts, substitutions of aluminium (Al) for silicon (Si) in the cristobalite structure, and impurities occluding the silica surface, have been hypothesised to decrease its toxicity...
August 9, 2017: Environmental Research
https://www.readbyqxmd.com/read/28801410/radiographic-features-of-importance-in-the-national-institute-for-occupational-safety-and-health-administered-coal-workers-health-surveillance-program-characterising-the-use-of-the-other-symbols
#19
Cara N Halldin, Janet M Hale, David J Blackley, A Scott Laney
OBJECTIVE: The National Institute for Occupation Safety and Health-administered Coal Workers' Health Surveillance Program (CWHSP) provides radiographic pneumoconiosis screening for US coal miners. Radiographs are classified by readers according to International Labour Office criteria. In addition to pneumoconiotic parenchymal and pleural lung abnormalities, readers document radiographic features of importance (other symbols). Other symbols are not meant to imply a diagnosis or interpretation but are relevant as they provide information beyond a pneumoconiosis classification for features related to dust exposure and other aetiologies...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28800688/monitoring-of-air-pollution-levels-related-to-charilaos-trikoupis-bridge
#20
D A Sarigiannis, E J Handakas, M Kermenidou, I Zarkadas, A Gotti, P Charisiadis, K Makris, M Manousakas, K Eleftheriadis, S P Karakitsios
Charilaos Trikoupis bridge is the longest cable bridge in Europe that connects Western Greece with the rest of the country. In this study, six air pollution monitoring campaigns (including major regulated air pollutants) were carried out from 2013 to 2015 at both sides of the bridge, located in the urban areas of Rio and Antirrio respectively. Pollution data were statistically analyzed and air quality was characterized using US and European air quality indices. From the overall campaign, it was found that air pollution levels were below the respective regulatory thresholds, but once at the site of Antirrio (26...
August 7, 2017: Science of the Total Environment
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