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Formation of reactive oxygen species in rat epithelial cells upon stimulation with fly ash.
J Biosci ; 2003 Feb; 28(1): 51-5
Artículo en Inglés | IMSEAR | ID: sea-110999
ABSTRACT
Fly ash was used as a model for ambient particulate matter which is under suspicion to cause adverse pulmonary health effects. The fly ash was pre-sized and contained only particles < 20 microm including an ultrafine fraction (< 100 nm) that contributed 31% to the particle number. In our study, we investigated the influence of fly ash on the promotion of early inflammatory reactions like the formation of reactive oxygen species (ROS) in rat lung epithelial cells (RLE-6TN). Furthermore, we determined the formation of nitric oxide (NO). The cells show a clear dose-response relationship concerning the formation of ROS with regard to the mass of particles applied. Lipopolysaccharide (LPS) added as a co-stimulus did not increase the formation of ROS induced by fly ash. Furthermore, in LPS (0.1 microg/ml) and tumour necrosis factor-alpha (TNF-alpha; 1 ng/ml) pre-treated cells no increase in reactive oxygen species comparable to fly ash alone is observable. In presence of the metal chelator, desferrioxamine (DFO), ROS formation can be significantly reduced. Neither fly ash nor LPS induced a significant NO release in RLE-6TN cells.
Asunto(s)
Texto completo: Disponible Índice: IMSEAR (Asia Sudoriental) Asunto principal: Tamaño de la Partícula / Ratas / Acetato de Tetradecanoilforbol / Carbono / Línea Celular / Transformación Celular Viral / Quelantes / Lipopolisacáridos / Factor de Necrosis Tumoral alfa / Especies Reactivas de Oxígeno Tipo de estudio: Estudio pronóstico Idioma: Inglés Revista: J Biosci Año: 2003 Tipo del documento: Artículo

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Texto completo: Disponible Índice: IMSEAR (Asia Sudoriental) Asunto principal: Tamaño de la Partícula / Ratas / Acetato de Tetradecanoilforbol / Carbono / Línea Celular / Transformación Celular Viral / Quelantes / Lipopolisacáridos / Factor de Necrosis Tumoral alfa / Especies Reactivas de Oxígeno Tipo de estudio: Estudio pronóstico Idioma: Inglés Revista: J Biosci Año: 2003 Tipo del documento: Artículo