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Journal of Radioanalytical and Nuclear Chemistry

, Volume 302, Issue 2, pp 983–988 | Cite as

Production of gamma induced reactive oxygen species and damage of DNA molecule in HaCaT cells under euoxic and hypoxic condition

  • P. Joseph
  • N. N. Bhat
  • D. Copplestone
  • Y. Narayana
Article

Abstract

The paper deals with the study of gamma radiation induced reactive oxygen species (ROS) generation in normal human keratinocytes (HaCaT) cells and quantification of subsequent damages induced on DNA molecules. The DNA damages induced in cells after gamma irradiation has been analyzed using Alkaline comet assay. The ROS produced in the cells were quantified by measuring fluorescence after loading the cells with 2′, 7′ dichlorofluorescin diacetate, a dye that is oxidized into a highly fluorescent form in the presence of peroxides. Studies reveal that in HaCaT cells radical generation occurs when exposed to ionizing radiation and it increases with dose. The induced DNA damages also increases with dose and ROS generation. The study clearly shows the importance of ROS in DNA damage induction and the cells possessing elevated levels of DNA damage after radiation exposure is due to the effect of increased levels of intracellular ROS.

Keywords

Comet assay DNA Gamma radiation Oxygen enhancement ratio Reactive oxygen species 

Notes

Acknowledgments

The authors are grateful to Board of Research in Nuclear Sciences (BRNS) and Association of Commonwealth Universities (ACU) for the financial support. The help received from Abhay Puthli and Reeta Tiwari during the work is thankfully acknowledged.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2014

Authors and Affiliations

  • P. Joseph
    • 1
  • N. N. Bhat
    • 2
  • D. Copplestone
    • 3
  • Y. Narayana
    • 4
  1. 1.Department of PhysicsSt Joseph’s CollegeIdukkiIndia
  2. 2.RPADBhabha Atomic Research CentreMumbaiIndia
  3. 3.Biological and Environmental Sciences, School of Natural SciencesUniversity of StirlingStirlingUK
  4. 4.Department of Studies in PhysicsMangalore UniversityMangaloreIndia

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