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Intrinsic radiosensitivity correlated with radiation-induced ROS and cell cycle regulation

Content Provider	Springer Nature Link
Author	Seong, Ki Moon Kim, Cha Soon Jeon, Ha Yeon Oh, Sin Hye Nam, Seon Young Yang, Kwang Hee Kim, Ji Young Jin, Young Woo
Copyright Year	2010
Abstract	Ionizing radiation (IR) can induce multiple cellular responses which determine the fate of cells, including chromosomal aberrations, genetic mutations, cell cycle arrest, apoptosis, and cell differentiation. IR also enhances the production of reactive oxygen species (ROS) in a variety of cells, causing DNA damage and activating several proteins involved in the DNA repair system. The balance between DNA damage and repair is a key determinant of intrinsic radiation sensitivity. In this study, we investigated the survival rate in different types of cell lines (HUVEC, Bud-8, CCD-18Lu and Jurkat) after irradiation at various doses of γ-radiation, and compared the radiationinduced ROS generation with cell viability. We also measured micronuclei frequency in the irradiated cells in order to verify the cytogenetic analysis by radiation. In addition, we analyzed the cellular level of several proteins related to the cell cycle in order to characterize the correlation between the intrinsic radiosensitivity and cell cycle regulation. We found that the intrinsic viability of irradiated cells was correlated with the radiation-induced ROS production as well as the function of the organ of origination. We also observed increased cell cycle protein expression in radiationsensitive cells compared to radiation-resistant cells. These results suggest that intrinsic cellular sensitivity to irradiation is dependent on ROS generation and cell cycle regulation.
Starting Page	1
Ending Page	7
Page Count	7
File Format	PDF
ISSN	1738642X
Journal	Molecular & Cellular Toxicology
Volume Number	6
Issue Number	1
e-ISSN	20928467
Language	English
Publisher	The Korean Society of Toxicogenomics and Toxicoproteomics
Publisher Date	2010-05-02
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ionizing radiation Radiosensitivity Reactive oxygen species Cell cycle Pharmacology/Toxicology Cell Biology
Content Type	Text
Resource Type	Article
Subject	Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health Toxicology Pathology and Forensic Medicine

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