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Filename: controllers/Detail.php
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File: /var/www/html/index.php
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Filename: controllers/Detail.php
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File: /var/www/html/index.php
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Filename: controllers/Detail.php
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Filename: controllers/Detail.php
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Filename: models/Detail_model.php
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Filename: controllers/Detail.php
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Filename: controllers/Detail.php
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Background: Occupational asthma, induced by workplace exposures to low molecular weight agents such as toluene 2,4-diisocyanate (TDI), causes a significant burden to patients and society. Little is known about innate lymphoid cells (ILCs) in TDI-induced asthma. A critical regulator of ILC function is microRNA-155, a microRNA associated with asthma.
Objective: To determine whether TDI exposure modifies the number of ILCs in the lung and whether microRNA-155 contributes to TDI-induced airway inflammation and hyperresponsiveness.
Methods: C57BL/6 wild-type and microRNA-155 knockout mice were sensitised and challenged with TDI or vehicle. Intracellular cytokine expression in ILCs and T-cells was evaluated in bronchoalveolar lavage (BAL) fluid using flow cytometry. Peribronchial eosinophilia and goblet cells were evaluated on lung tissue, and airway hyperresponsiveness was measured using the forced oscillation technique. Putative type 2 ILCs (ILC2) were identified in bronchial biopsies of subjects with TDI-induced occupational asthma using immunohistochemistry. Human bronchial epithelial cells were exposed to TDI or vehicle.
Results: TDI-exposed mice had higher numbers of airway goblet cells, BAL eosinophils, CD4 T-cells and ILCs, with a predominant type 2 response, and tended to have airway hyperresponsiveness. In TDI-exposed microRNA-155 knockout mice, inflammation and airway hyperresponsiveness were attenuated. TDI exposure induced IL-33 expression in human bronchial epithelial cells and in murine lungs, which was microRNA-155 dependent in mice. GATA3CD3 cells, presumably ILC2, were present in bronchial biopsies.
Conclusion: TDI exposure is associated with increased numbers of ILCs. The proinflammatory microRNA-155 is crucial in a murine model of TDI asthma, suggesting its involvement in the pathogenesis of occupational asthma due to low molecular weight agents.
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http://dx.doi.org/10.1183/13993003.01289-2019 | DOI Listing |
J Allergy Clin Immunol Pract
December 2024
Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA; Asthma and Environmental Lung Health Institute@UPMC, University of Pittsburgh, Pittsburgh, PA; Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, PA. Electronic address:
Curr Allergy Asthma Rep
December 2024
Laboratorios INMUNOTEK, Madrid, Spain.
We have read with great interest the recent review published by Dr. Ebo and collaborators on cannabis allergy. It highlights the difficulties in getting a valid diagnosis because some patients do not admit its consumption, which may not be legalized, there are no commercial extracts and there are problems in cutaneous tests interpretation due to cross-reactivity with other related allergens.
View Article and Find Full Text PDFJ Expo Sci Environ Epidemiol
December 2024
Department of Health Sciences, Karlstad University, Karlstad, Sweden.
Background: Endocrine disrupting chemicals (EDCs) can cross the placenta and thereby expose the fetus, which may lead to developmental consequences. It is still unclear which chemicals are of concern regarding neurodevelopment and specifically behaviour, when being exposed to a mixture.
Objective: The objective is to determine associations between prenatal exposure to EDCs and behavioural difficulties.
Sci Total Environ
December 2024
Inhalation toxicology laboratory, Department of Environmental and Biological Science, University of Eastern Finland, Yliopistonranta 1, P.O. Box 1627, FI-70211 Kuopio, Finland.
Particulate matter (PM) and contaminants attached to PM can increase the risk of respiratory diseases. However, the health risk assessment of chlorinated paraffins (CPs), an emerging pollutant occupying a high proportion of persistent organic pollutants (POPs) in PM, remains scarce. This study aimed to evaluate the association between PM-bound CPs and asthma, along with relative symptoms, in school-aged children and adolescents.
View Article and Find Full Text PDFSaf Health Work
December 2024
Department of Internal Medicine, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada.
Background: This study characterized the risk of new-onset asthma among workers in Manitoba, Canada.
Methods: Accepted time loss claims from the Workers' Compensation Board of Manitoba from 2006 to 2019, containing workers' occupations and industries, were linked with administrative health data from 1996 to 2020. After restricting the cohort to the first claim per person in an occupation and applying age and coverage exclusions, the cohort comprised 142,588 person-occupation combinations.
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