Wood dust exposure has been found to be an occupational hazard, being linked to an enhanced incidence of various neoplasias.
Here we performed an experiment to evaluate the ability of solvent extracts of natural woods to induce chromosome aberrations in respiratory cells in culture.
Human embryonic lung cells, MRC-5, grown in Dolbecco's medium were exposed to various concentrations of the dust extracts of pesticide-free (untreated) beech, oak and pine woods.
Three concentrations per extract with and without metabolic activation (S9) and 100 metaphase cells per dose were examined for possible structural aberrations.
Although no dose-dependent activity could be found with any extract in the presence of S9, most aberrations observed were of the chromatid type caused by oak wood.
Dose-dependent chromosomal breaks caused by oak and chromatid breaks caused by both beech and oak were observed in the absence of S9.
These data might support the early hypothesis that hard wood dust per se contains some in vivo genotoxic and thus possibly carcinogenic components.
Mots-clés Pascal : Poussière, Bois, Toxicité, Exposition professionnelle, Médecine travail, Homme, Tumeur maligne, Carcinogène, In vitro, Culture cellulaire, DNA, Aberration chromosomique, Industrie bois, Test mutagénicité, Pinus, Coniferales, Gymnospermae, Spermatophyta, Etude comparative, Fagus, Fagaceae, Dicotyledones, Angiospermae, Quercus, Ebeniste, Lignée MRC5
Mots-clés Pascal anglais : Dust, Wood, Toxicity, Occupational exposure, Occupational medicine, Human, Malignant tumor, Carcinogen, In vitro, Cell culture, DNA, Chromosomal aberration, Wood industry, Mutagenicity testing, Pinus, Coniferales, Gymnospermae, Spermatophyta, Comparative study, Fagus, Fagaceae, Dicotyledones, Angiospermae, Quercus
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0021435
Code Inist : 002B03L03. Création : 01/03/1996.