Laboratory of Hygiene and Occupational Diseases, Institute of Occupation Safety and Environmental Health, Riga Stradins University, Riga, Latvia.
Laboratory of Bioanalytical and Biodosimetry Methods, Faculty of Biology, University of Latvia, Riga, Latvia.
Sci Rep. 2021 Oct 12;11(1):20181. doi: 10.1038/s41598-021-99815-7.
Inhalation is the main route of exposure to airborne pollutants. To evaluate the safety and assess the risks of occupational hazards different testing approaches are used. 3D airway epithelial tissues allow to mimic exposure conditions in vitro, generates human-relevant toxicology data, allows to elucidate the mode of action of pollutants. Gillian3500 pumps were used to collect the airborne particulate from woodworking and metalworking environments. EpiAirway tissues were used to model half working day (4 h), full working day (8 h), and 3 working day exposures to occupational pollutants. Tissue viability was assessed using an MTT assay. For preliminary assessment, RT-qPCR analyses were performed to analyze the expression of gelsolin, caspase-3, and IL-6. Tissue morphology was assessed by hematoxylin/eosin staining. An effect on the proliferation of lung epithelial cell line A549 was assessed. Acute exposure to workspace pollutants slightly affected tissue viability and did not change the morphology. No inhibiting effect was observed on the proliferation of A549 cells. Preliminary analysis showed that both types of particles suppressed the expression of gelsolin, with the effect of metalworking samples being more pronounced. A slight reduction in caspase-3 expression was observed. Particles from metalworking suppressed IL-6 expression.
吸入是暴露于空气中污染物的主要途径。为了评估安全性并评估职业危害的风险,使用了不同的测试方法。3D 气道上皮组织允许在体外模拟暴露条件,产生与人相关的毒理学数据,并阐明污染物的作用模式。Gillian3500 泵用于收集来自木工和金属加工环境的空气传播颗粒物。EpiAirway 组织用于模拟半工作日(4 小时)、全日工作(8 小时)和 3 个工作日的职业污染物暴露。使用 MTT 测定法评估组织活力。为了初步评估,进行了 RT-qPCR 分析以分析明胶酶、半胱天冬酶-3 和 IL-6 的表达。通过苏木精/伊红染色评估组织形态。评估了对肺上皮细胞系 A549 增殖的影响。工作场所污染物的急性暴露轻微影响组织活力,并且不改变形态。未观察到对 A549 细胞增殖的抑制作用。初步分析表明,这两种类型的颗粒均抑制明胶酶的表达,金属加工样本的作用更为明显。观察到半胱天冬酶-3 的表达略有降低。金属加工产生的颗粒抑制了 IL-6 的表达。