Evaluation of the redox state in mouse organs following radon inhalation

Takahiro Kataoka, Norie Kanzaki, Akihiro Sakoda, Hina Shuto, Junki Yano, Shota Naoe, Hiroshi Tanaka, Katsumi Hanamoto, Hiroaki Terato, Fumihiro Mitsunobu, Kiyonori Yamaoka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Radon inhalation activates antioxidative functions in mouse organs, thereby contributing to inhibition of oxidative stress-induced damage. However, the specific redox state of each organ after radon inhalation has not been reported. Therefore, in this study, we evaluated the redox state of various organs in mice following radon inhalation at concentrations of 2 or 20 kBq/m3 for 1, 3 or 10 days. Scatter plots were used to evaluate the relationship between antioxidative function and oxidative stress by principal component analysis (PCA) of data from control mice subjected to sham inhalation. The results of principal component (PC) 1 showed that the liver and kidney had high antioxidant capacity; the results of PC2 showed that the brain, pancreas and stomach had low antioxidant capacities and low lipid peroxide (LPO) content, whereas the lungs, heart, small intestine and large intestine had high LPO content but low antioxidant capacities. Furthermore, using the PCA of each obtained cluster, we observed altered correlation coefficients related to glutathione, hydrogen peroxide and LPO for all groups following radon inhalation. Correlation coefficients related to superoxide dismutase in organs with a low antioxidant capacity were also changed. These findings suggested that radon inhalation could alter the redox state in organs; however, its characteristics were dependent on the total antioxidant capacity of the organs as well as the radon concentration and inhalation time. The insights obtained from this study could be useful for developing therapeutic strategies targeting individual organs.

Original languageEnglish
Pages (from-to)206-216
Number of pages11
JournalJournal of radiation research
Issue number2
Publication statusPublished - Mar 10 2021


  • antioxidative function
  • oxidative stress
  • principal component analysis
  • radon
  • redox state

ASJC Scopus subject areas

  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Health, Toxicology and Mutagenesis


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