Formation of reactive oxygen species in rat epithelial cells upon stimulation with fly ash.
J Biosci
;
2003 Feb; 28(1): 51-5
Artigo
em Inglês
| 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.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Tamanho da Partícula
/
Ratos
/
Acetato de Tetradecanoilforbol
/
Carbono
/
Linhagem Celular
/
Transformação Celular Viral
/
Quelantes
/
Lipopolissacarídeos
/
Fator de Necrose Tumoral alfa
/
Espécies Reativas de Oxigênio
Tipo de estudo:
Estudo prognóstico
Idioma:
Inglês
Revista:
J Biosci
Ano de publicação:
2003
Tipo de documento:
Artigo
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