1. Acetaldehyde induces NER repairable mutagenic DNA lesions.
- Author
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Sonohara Y, Takatsuka R, Masutani C, Iwai S, and Kuraoka I
- Subjects
- DNA Damage drug effects, DNA Repair genetics, Fibroblasts drug effects, Humans, Mutagenesis genetics, Mutagens adverse effects, Transfection methods, Ultraviolet Rays, Xeroderma Pigmentosum genetics, Xeroderma Pigmentosum Group A Protein genetics, Acetaldehyde adverse effects, DNA genetics, DNA Repair drug effects, Mutagenesis drug effects
- Abstract
Nucleotide excision repair (NER) is a repair mechanism that removes DNA lesions induced by UV radiation, environmental mutagens and carcinogens. There exists sufficient evidence against acetaldehyde suggesting it to cause a variety of DNA lesions and be carcinogenic to humans. Previously, we found that acetaldehyde induces reversible intra-strand GG crosslinks in DNA similar to those induced by cis-diammineplatinum(II) that is subsequently repaired by NER. In this study, we analysed the repairability by NER mechanism and the mutagenesis of acetaldehyde. In an in vitro reaction setup with NER-proficient and NER-deficient xeroderma pigmentosum group A (XPA) cell extracts, NER reactions were observed in the presence of XPA recombinant proteins in acetaldehyde-treated plasmids. Using an in vivo assay with living XPA cells and XPA-correcting XPA cells, the repair reactions were also observed. Additionally, it was observed that DNA polymerase eta inserted dATP opposite guanine in acetaldehyde-treated oligonucleotides, suggesting that acetaldehyde-induced GG-to-TT transversions. These findings show that acetaldehyde induces NER repairable mutagenic DNA lesions., (© The Author(s) 2021. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
- Published
- 2022
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