Table of Contents
ISRN Endocrinology
Volume 2012 (2012), Article ID 292041, 11 pages
Review Article

Activation of Biodefense System by Low-Dose Irradiation or Radon Inhalation and Its Applicable Possibility for Treatment of Diabetes and Hepatopathy

Graduate School of Health Sciences, Okayama University, 5-1 Shikata-cho 2-chome, Kita-ku, Okayama-shi, Okayama 700-8558, Japan

Received 16 August 2011; Accepted 28 September 2011

Academic Editors: V. A. Lux-Lantos and D. G. Romero

Copyright © 2012 Takahiro Kataoka and Kiyonori Yamaoka. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Adequate oxygen stress induced by low-dose irradiation activates biodefense system, such as induction of the synthesis of superoxide dismutase (SOD) and glutathione peroxidase. We studied the possibility for alleviation of oxidative damage, such as diabetes and nonalcoholic liver disease. Results show that low-dose 𝛾 -irradiation increases SOD activity and protects against alloxan diabetes. Prior or post-low-dose X- or 𝛾 -irradiation increases antioxidative functions in livers and inhibits ferric nitrilotriacetate and carbon tetrachloride-induced (CCl4) hepatopathy. Moreover, radon inhalation also inhibits CCl4-induced hepatopathy. It is highly possible that low-dose irradiation including radon inhalation activates the biodefence systems and, therefore, contributes to preventing or reducing reactive oxygen species-related diabetes and nonalcoholic liver disease, which are thought to involve peroxidation.