Journal Article

Analysis of liver damage from radon, X-ray, or alcohol treatments in mice using a self-organizing map

Norie Kanzaki, Takahiro Kataoka, Reo Etani, Kaori Sasaoka, Akihiro Kanagawa and Kiyonori Yamaoka

in Journal of Radiation Research

Volume 58, issue 1, pages 33-40
Published in print January 2017 | ISSN: 0449-3060
Published online January 2017 | e-ISSN: 1349-9157 | DOI: https://dx.doi.org/10.1093/jrr/rrw083
Analysis of liver damage from radon, X-ray, or alcohol treatments in mice using a self-organizing map

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  • Clinical Genetics
  • Molecular Biology and Genetics
  • Epidemiology
  • Radiology
  • Nuclear Chemistry, Photochemistry, and Radiation

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Abstract

In our previous studies, we found that low-dose radiation inhibits oxidative stress–induced diseases due to increased antioxidants. Although these effects of low-dose radiation were demonstrated, further research was needed to clarify the effects. However, the analysis of oxidative stress is challenging, especially that of low levels of oxidative stress, because antioxidative substances are intricately involved. Thus, we proposed an approach for analysing oxidative liver damage via use of a self-organizing map (SOM)—a novel and comprehensive technique for evaluating hepatic and antioxidative function. Mice were treated with radon inhalation, irradiated with X-rays, or subjected to intraperitoneal injection of alcohol. We evaluated the oxidative damage levels in the liver from the SOM results for hepatic function and antioxidative substances. The results showed that the effects of low-dose irradiation (radon inhalation at a concentration of up to 2000 Bq/m3, or X-irradiation at a dose of up to 2.0 Gy) were comparable with the effect of alcohol administration at 0.5 g/kg bodyweight. Analysis using the SOM to discriminate small changes was made possible by its ability to ‘learn’ to adapt to unexpected changes. Moreover, when using a spherical SOM, the method comprehensively examined liver damage by radon, X-ray, and alcohol. We found that the types of liver damage caused by radon, X-rays, and alcohol have different characteristics. Therefore, our approaches would be useful as a method for evaluating oxidative liver damage caused by radon, X-rays and alcohol.

Keywords: liver damage; oxidative stress; self-organizing map; radon; X-ray; alcohol

Journal Article.  4225 words.  Illustrated.

Subjects: Clinical Genetics ; Molecular Biology and Genetics ; Epidemiology ; Radiology ; Nuclear Chemistry, Photochemistry, and Radiation

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