Decrease in respiratory function and electron transport chain induced by airborne particulate matter (PM10) exposure in lung mitochondria.
Toxicol Pathol
; 41(4): 628-38, 2013.
Article
em En
| MEDLINE
| ID: mdl-23104767
ABSTRACT
Particulate matter, with a mean aerodynamic diameter of ≤10 µm (PM10), exposure is considered as a risk factor for cardiovascular and respiratory diseases. The mechanism of cell damage induced by PM10 exposure is related to mitochondrial alterations. The aim of this work was to investigate the detailed alterations induced by PM10 on mitochondrial function. Since lung tissue is one of the most important targets of PM10 inhalation, isolated mitochondria from lung rat tissue were exposed to PM10 and structural alterations were analyzed by transmission electron microscopy. Mitochondrial function was evaluated by respiratory control index (RCI), membrane potential, adenosine triphosphate (ATP) synthesis, and activity of respiratory chain. Results showed that exposure to PM10 in isolated mitochondria from lung tissue caused enlarged intermembrane spaces and shape alterations, disruption of cristae, and the decrease in dense granules. Oxygraphic traces showed a concentration-dependent decrease in oxygen consumption and RCI. In addition, mitochondrial membrane potential, ATP synthesis, and activity of complexes II and IV showed an increase and decrease, respectively, after PM10 exposure. PM10 exposure induced disruption in structure and function in isolated mitochondria from lung rat tissue.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Exposição por Inalação
/
Transporte de Elétrons
/
Material Particulado
/
Pulmão
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Mitocôndrias
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Toxicol Pathol
Ano de publicação:
2013
Tipo de documento:
Article