Abstract
Sulfur mustard (SM) is known to induce cutaneous injury and to cause acute damage to the respiratory tract. Although skin vesication has been demonstrated on human epidermal keratinocytes in culture, no study has been carried out to analyze the effects of SM on the ultrastructural and functional activity of surface respiratory epithelial cells. To evaluate this SM toxicity, we developed an in vitro model of respiratory epithelial cells in primary culture. The study was performed on surface epithelial cells from rabbit trachea cultured according to the explant-outgrowth technique. The functional activity of the cultures was evaluated by measuring the ciliary beating frequency (CBF) of the ciliated cells with a videomicroscopic method. The morphological aspects of the cells were analyzed by light and electron microscopy. Addition of 0.1 mM SM directly into the culture medium produced a sudden and irreversible CBF inhibition, first observed after 2 hr on the ciliated cells of the outgrowth periphery. The arrest of the ciliary beating progressively reached the whole surface of the outgrowth and was simultaneously observed with a detachment of the outgrowth cells. It began at the outgrowth border, leading to the exfoliation of cell sheets, and then to the whole culture after 48 hr. Morphological damage was expressed by intense vacuolisation and disorganization of cytoplasmic and nuclear structures. These findings suggest that the detachment of the respiratory epithelial cells from the matrix represents a major toxic effect of 0.1 mM SM. SM dramatically affects the viability of respiratory epithelial cells in culture. Moreover, the sudden CBF inhibition is more likely due to the death of the ciliated cells than to a specific ciliotoxic effect of SM.
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Abbreviations
- CBF:
-
ciliary beating frequency
- HEPES:
-
N2-hydroxyethylpiperazine-N'2ethanesulfonic acid
- PBS:
-
phosphate buffer saline
- SM:
-
sulfur mustard
- TEM:
-
transmission electron microscopy
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Chevillard, M., Lainee, P., Robineau, P. et al. Toxic effects of sulfur mustard on respiratory epithelial cells in culture. Cell Biol Toxicol 8, 171–181 (1992). https://doi.org/10.1007/BF00260566
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DOI: https://doi.org/10.1007/BF00260566