Gene Expression Patterns of Spleen, Lung and Brain with Different Radiosensitivity in C57BL6 Mice

  • Majumder Md. Zahidur Rahman (Laboratory of Radiation Effect, Korea Institute of Radiological and Medical Sciences) ;
  • Lee, Woo-Jung (Laboratory of Radiation Effect, Korea Institute of Radiological and Medical Sciences) ;
  • Lee, Su-Jae (Laboratory of Radiation Experimental Therapeutics, Korea Institute of Radiological and Medical Sciences) ;
  • Bae, Sang-Woo (Laboratory of Radiation Effect, Korea Institute of Radiological and Medical Sciences) ;
  • Lee, Yun-Sil (Laboratory of Radiation Effect, Korea Institute of Radiological and Medical Sciences)
  • Published : 2005.12.30


Although little information is available on the underlying mechanisms, various genetic factors have been associated with tissue-specific responses to radiation. In the present study, we explored the possibility whether organ specific gene expression is associated with radiosensitivity using samples from brain, lung and spleen. We examined intrinsic expression pattern of 23 genes in the organs by semi-quantitative RT-PCR method using both male and female C57BL/6 mice. Expression of p53 and p21, well known factors for governing sensitivity to radiation or chemotherapeutic agents, was not different among the organ types. Both higher expression of sialyltransferase, delta7-sterol reductase, leptin receptor splice variant form 12.1, and Cu/Zn superoxide dismutase (SOD) and lower expression of alphaB crystalline were specific for spleen tissue. Expression level of glutathione peroxidase and APO-1 cell surface antigen gene in lung tissue was high, while that of Na, K-ATPase alpha-subunit, Cu/ZnSOD, and cyclin G was low. Brain, radioresistant organ, showed higher expressions of Na, K-ATPase-subunit, cyclin G, and nucleolar protein hNop56 and lower expression of delta7-sterol reductase. The result revealed a potential correlation between gene expression patterns and organ sensitivity, and Identified genes which might be responsible for organ sensitivity.


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