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Changes in DNA 8-hydroxyguanine levels, 8-hydroxyguanine repair activity, and hOGG1 and hMTH1 mRNA expression in human lung alveolar epithelial cells induced by crocidolite asbestos

Kim, H.-N., Morimoto, Y., Tsuda, T., Ootsuyama, Y., Hirohashi, M., Hirano, T., Tanaka, I., Lim, Y., Yun, I.-G., Kasai, H.·2001·Carcinogenesis
DOI 10.1093/carcin/22.2.265
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Abstract

We examined 8-hydroxyguanine (8-OH-Gua) formation and 8-OH-Gua repair enzyme activity in pulmonary type-II-like epithelial cells to determine whether oxidative stress induced by asbestos plays a role in its carcinogenic mechanism. A549 cells were incubated with crocidolite asbestos at concentrations of 0, 10, 50 and 100 microg/ml over 27 h. We then evaluated 8-OH-Gua formation, 8-OH-Gua repair enzyme activity and gene expression of 8-oxoguanine-DNA glycosylase 1 (hOGG1) and human MUtT homologue (hMTH1). This was done using a high-performance liquid chromatography system equipped with an electrochemical detector, endonuclease nicking assay and reverse transcription polymerase chain reaction, respectively. Crocidolite induced the formation of 8-OH-Gua in DNA at concentrations of 50 and 100 microg/ml. 8-OH-Gua levels increased at 9 h and had declined to near baseline at 27 h, whereas 8-OH-Gua repair enzyme activity peaked at 18 h post-crocidolite exposure. hOGG1 and hMTH1 mRNA levels were also increased by crocidolite exposure. These data suggest that crocidolite asbestos is associated with epithelial cell injury in the process of carcinogenesis through oxidative stress.

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Metadata

Authors
Kim, H.-N., Morimoto, Y., Tsuda, T., Ootsuyama, Y., Hirohashi, M., Hirano, T., Tanaka, I., Lim, Y., Yun, I.-G., & Kasai, H.
Venue
Carcinogenesis
Publisher
Oxford University Press (OUP)
Published
2001-02-01
Volume
22
Issue
2
Pages
265-269
ISSN
  • 0143-3334
  • 1460-2180
DOI
10.1093/carcin/22.2.265
Cited by
65
References
3
Language
en

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CoChat. (2026). Citation check: Changes in DNA 8-hydroxyguanine levels, 8-hydroxyguanine repair activity, and hOGG1 and hMTH1 mRNA expression in human lung alveolar epithelial cells induced by crocidolite asbestos. https://app.cochat.ai/papers/10.1093/carcin/22.2.265
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Kim, H.-N., Morimoto, Y., Tsuda, T., Ootsuyama, Y., Hirohashi, M., Hirano, T., Tanaka, I., Lim, Y., Yun, I.-G., & Kasai, H. (2001). Changes in DNA 8-hydroxyguanine levels, 8-hydroxyguanine repair activity, and hOGG1 and hMTH1 mRNA expression in human lung alveolar epithelial cells induced by crocidolite asbestos. Carcinogenesis. https://doi.org/10.1093/carcin/22.2.265