Oxidative stress in lung epithelial cells from patients with idiopathic interstitial pneumonias

K. Kuwano, N. Nakashima, I. Inoshima, N. Hagimoto, M. Fujita, M. Yoshimi, T. Maeyama, Naoki Hamada, K. Watanabe, N. Hara

Research output: Contribution to journalArticle

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Abstract

Lung epithelial cells are a primary target for reactive oxygen species (ROS). ROS can cause oxidative deoxyribonucleic acid modification, such as 8-hydroxy-deoxyguanosine (8-OHdG). A human homologue of the MutT protein (hMTH1) prevents this modification. Mitochondria are the most important cellular source of ROS and may be susceptible to oxidative damage. The purpose of this study is to investigate oxidative stress and mitochondrial damage in lung epithelial cells from idiopathic interstitial pneumonias (IIPs). The authors analysed 8-OHdG, hMTH1, and mitochondrial proteins on lung specimens from 13 patients with IIPs consisted of eight patients with usual interstitial pneumonia and five patients with nonspecific interstitial pneumonia using Western blot analysis and immunohistochemistry. Immunoreactivity for 8-OHdG and hMTH1 was significantly increased in the lung epithelial cells from patients with IIPs compared with controls. The expression of hMTH1 was localised in the nuclear and cytoplasmic, but not the mitochondrial, fraction of lung homogenates. Immunoreactivity for mitochondrial protein and cytochrome c oxidase complex subunit IV was increased in the lung epithelial cells from patients with IIPs compared with controls. The current study concludes that oxidative stress may participate in epithelial cell damage in idiopathic interstitial pneumonia, and that increased mitochondrial mass may associate with increased reactive oxygen species production in idiopathic interstitial pneumonia.

Original languageEnglish
Pages (from-to)232-240
Number of pages9
JournalEuropean Respiratory Journal
Volume21
Issue number2
DOIs
Publication statusPublished - Feb 1 2003

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Idiopathic Interstitial Pneumonias
Oxidative Stress
Epithelial Cells
Lung
Reactive Oxygen Species
Mitochondrial Proteins
Electron Transport Complex IV
Idiopathic Pulmonary Fibrosis
Deoxyguanosine
Interstitial Lung Diseases
Mitochondria
Western Blotting
Immunohistochemistry
DNA

All Science Journal Classification (ASJC) codes

  • Pulmonary and Respiratory Medicine

Cite this

Kuwano, K., Nakashima, N., Inoshima, I., Hagimoto, N., Fujita, M., Yoshimi, M., ... Hara, N. (2003). Oxidative stress in lung epithelial cells from patients with idiopathic interstitial pneumonias. European Respiratory Journal, 21(2), 232-240. https://doi.org/10.1183/09031936.03.00063203

Oxidative stress in lung epithelial cells from patients with idiopathic interstitial pneumonias. / Kuwano, K.; Nakashima, N.; Inoshima, I.; Hagimoto, N.; Fujita, M.; Yoshimi, M.; Maeyama, T.; Hamada, Naoki; Watanabe, K.; Hara, N.

In: European Respiratory Journal, Vol. 21, No. 2, 01.02.2003, p. 232-240.

Research output: Contribution to journalArticle

Kuwano, K, Nakashima, N, Inoshima, I, Hagimoto, N, Fujita, M, Yoshimi, M, Maeyama, T, Hamada, N, Watanabe, K & Hara, N 2003, 'Oxidative stress in lung epithelial cells from patients with idiopathic interstitial pneumonias', European Respiratory Journal, vol. 21, no. 2, pp. 232-240. https://doi.org/10.1183/09031936.03.00063203
Kuwano, K. ; Nakashima, N. ; Inoshima, I. ; Hagimoto, N. ; Fujita, M. ; Yoshimi, M. ; Maeyama, T. ; Hamada, Naoki ; Watanabe, K. ; Hara, N. / Oxidative stress in lung epithelial cells from patients with idiopathic interstitial pneumonias. In: European Respiratory Journal. 2003 ; Vol. 21, No. 2. pp. 232-240.
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