Effect of Cytosine Arabinoside, 3-Aminobenzamide and Hydroxyurea on the frequencies of radiation-induced micronuclei and aneuploidy in human lymphocytes

DNA 회복 저해제 Cytosine Arabinoside, 3-Aminobenzamide 및 Hydroxyurea가 방사선에 의해 유도된 소핵과 이수성에 미치는 영향

  • Cho, Yoon-Hee (School of Public Health and institute of Health and Environment, Seoul National University) ;
  • Kim, Yang-Jee (School of Public Health and institute of Health and Environment, Seoul National University) ;
  • Kang, Chang-Mo (Korea Institute of Radiological and Medical Sciences) ;
  • Ha, Sung-Whan (College of Medicine, Seoul National University) ;
  • Chung, Hai-Won (School of Public Health and institute of Health and Environment, Seoul National University)
  • Published : 2005.12.30


This study was carried out to examine the effect of the DNA repair inhibitors, Cytosine Arabinoside(Ara C), 3-Aminobenzamide(3AB) and Hydroxyurea(HU) on the frequencies of radiation-induced micronuclei(MNi) and aneuploidy. Irradiated lymphocytes(1-3Gy) were treated with DNA repair inhibitors, Ara C, 3AB and HU for 3 hours and CBMN assay - FISH technique with DNA probe for chromosome 1 and 4 was performed. The frequencies of x-ray induced MNi and aneuploidy of chromosome 1 and 4 were increased in a dose-dependent manner. Ara C, 3AB and HU enhanced the frequencies of radiation-induced MNi and the frequencies of radiation-induced aneuploidy of chromosome 1 and 4 were enhanced by HU and Ara C while no effect was observed by 3AB. The frequency of radiation-induced aneuploidy of chromosome 1 was higher than that of chromosome 4. These results suggest that there are different mechanisms involved in the formation of MNi and aneuploidy by radiation.


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