Study of in vitro and in vivo genotoxic effects of air pollution fine (PM2.5-0.18) and quasi-ultrafine (PM0.18) particles on lung models.
Sci Total Environ
; 711: 134666, 2020 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-31812380
Air pollution and particulate matter (PM) are classified as carcinogenic to humans. Pollutants evidence for public health concern include coarse (PM10) and fine (PM2.5) particles. However, ultrafine particles (PM0.1) are assumed to be more toxic than larger particles, but data are still needed to better understand their mechanism of action. In this context, the aim of our work was to investigate the in vitro and in vivo genotoxic potential of fine (PM2.5-018) and quasi ultra-fine (PM0.18) particles from an urban-industrial area (Dunkirk, France) by using comet, micronucleus and/or gene mutation assays. In vitro assessment was performed with 2 lung immortalized cell lines (BEAS-2B and NCI-H292) and primary normal human bronchial epithelial cells (NHBE) grown at the air-liquid interface or in submerged conditions (5⯵g PM/cm2). For in vivo assessment, tests were performed after acute (24â¯h, 100⯵g PM/animal), subacute (1â¯month, 10⯵g PM/animal) and subchronic (3â¯months, 10⯵g PM/animal) intranasal exposure of BALB/c mice. In vitro, our results show that PM2.5-018 and PM0.18 induced primary DNA damage but no chromosomal aberrations in immortalized cells. Negative results were noted in primary cells for both endpoints. In vivo assays revealed that PM2.5-018 and PM0.18 induced no significant increases in DNA primary damage, chromosomal aberrations or gene mutations, whatever the duration of exposure. This investigation provides initial answers regarding the in vitro and in vivo genotoxic mode of action of PM2.5-018 and PM0.18 at moderate doses and highlights the need to develop standardized specific methodologies for assessing the genotoxicity of PM. Moreover, other mechanisms possibly implicated in pulmonary carcinogenesis, e.g. epigenetics, should be investigated.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminación del Aire
Límite:
Animals
País/Región como asunto:
Europa
Idioma:
En
Revista:
Sci Total Environ
Año:
2020
Tipo del documento:
Article
Pais de publicación:
Países Bajos