Abstract
Incubation of homogenates of rat nasal mucosa with acrolein resulted in the apparent formation of DNA-protein cross-links. However, inhalation exposure of male Fischer-344 rats to acrolein (2.0 ppm, 6 h) did not cause detectable DNA-protein cross-linking in the nasal respiratory mucosa. Simultaneous exposure of rats to both acrolein (2.0 ppm) and formaldehyde (6.0 ppm) for 6 h resulted in a significantly higher yield of DNA-protein cross-links than was obtained following exposure to formaldehyde (6.0 ppm) alone. Acrolein exposure at concentrations of 0.1, 0.5, 1.0, or 2.5 ppm resulted in a concentration-dependent depletion of nonprotein sulfhydryl groups in the nasal respiratory mucosa. A plausible explanation for the enhancement of DNA-protein cross-links by simultaneous exposure to formaldehyde and acrolein may be that depletion of glutathione by acrolein inhibited the oxidative metabolism of formaldehyde, leading to an increase of formaldehyde-induced DNA-protein cross-links.
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Lam, CW., Casanova, M. & Heck, H.d. Depletion of nasal mucosal glutathione by acrolein and enhancement of formaldehyde-induced DNA-protein cross-linking by simultaneous exposure to acrolein. Arch Toxicol 58, 67–71 (1985). https://doi.org/10.1007/BF00348311
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DOI: https://doi.org/10.1007/BF00348311