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Modified neutral comet assay for human lymphocytes

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Comet assay under neutral conditions allows the detection of DNA double-strand breaks, considered to be the biologically relevant radiation-induced lesion. In this report we describe modifications of the neutral comet method, which simplify and facilitate its use for estimation of DNA double strand breaks in human lymphocytes irradiated with doses of 60Co gamma-rays (from 10 to 100 Gy). The analysis carried out according to this protocol takes less time than those published so far. Also, the use of lysis at 50°C is avoided; this is important in view of the presence of heat-labile sites in the DNA of irradiated cells, recently reported by Rydberg [12]. The comets have well defined, sharp limits, are suitable for computer image analysis and chromatin of the control cells remains condensed.
Czasopismo
Rocznik
Strony
1--5
Opis fizyczny
Bibliogr. 19 poz., rys.
Twórcy
  • Department of Radiobiology and Health Protection, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: +48 22/ 811 07 36; Fax: +48 22/ 811 15 32
autor
  • Department of Radiobiology and Health Protection, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: +48 22/ 811 07 36; Fax: +48 22/ 811 15 32
  • Department of Radiobiology and Health Protection, Institute of Nuclear Chemistry and Technology, 16 Dorodna Str., 03-195 Warsaw, Poland, Tel.: +48 22/ 811 07 36; Fax: +48 22/ 811 15 32
Bibliografia
  • 1. Banath JP, Fushiki M, Olive PL (1998) Rejoining of DNA singleand double-strand breaks in human white blood cells exposed to ionizing radiation. Int J Radiat Biol 73:649–660
  • 2. Collins A, Dusinska M, Franklin M et al. (1997) Comet assay in human biomonitoring studies: reliability, validation, and applications. Environ Mol Mutagen 30:139–146
  • 3. Fairbairn DW, Olive PL, O’Neill KL (1995) The comet assay: a comprehensive review. Mutat Res 339:37–59
  • 4. Klaude M, Eriksson S, Nygren J, Ahnstrom G (1996) The comet assay: mechanisms and technical considerations. Mutat Res 363:89–96
  • 5. Olive PL (1998) The role of DNA single- and double-strand breaks in cell killing by ionizing radiation. Radiat Res 150;S42–S51
  • 6. Olive PL (1999) DNA damage and repair in individual cells: applications of the comet assay in radiobiology. Int J Radiat Biol 75:395–405
  • 7. Olive PL, Banath JP (1993) Detection of DNA double-strand breaks through the cell cycle after exposure to X-rays, bleomycin, etoposide and 125IdUrd. Int J Radiat Biol 64:349–358
  • 8. Olive PL, Banath JP (1995) Radiation-induced DNA doublestrand breaks produced in histone-depleted tumor cell nuclei measured using the neutral comet assay. Radiat Res 142:144–152
  • 9. Olive PL, Wlodek D, Banath JP (1991) DNA double-strand breaks measured in individual cells subjected to gel electrophoresis. Cancer Res 51:4671–4676
  • 10. Östling O, Johanson KJ (1984) Microelectrophoretic study of radiation-induced DNA damages in individual mammalian cells. Biochem Biophys Res Commun 123:291–298
  • 11. Price ME, McKelvey-Martin VJ, Robson T, Hirst DG, McKeown SR (2000) Induction and rejoining of DNA double-strand breaks in bladder tumor cells. Radiat Res 153:788–794
  • 12. Rydberg B (2000) Radiation-induced heat-labile sites that convert into DNA double-strand breaks. Radiat Res 153:805–812
  • 13. Rydberg B, Johanson K (1978) Mammalian cells. In: DNA repair mechanisms. Academic Press, New York, pp 465–468
  • 14. Singh NP, McCoy MT, Tice RR, Schneider EL (1988) A simple technique for quantitation of low levels of DNA damage in individual cells. Exp Cell Res 175:184–191
  • 15. Singh NP, Stephens RE (1997) Microgel electrophoresis: sensitivity, mechanisms, and DNA electrostretching. Mutat Res 383:167–175
  • 16. Singh NP, Stephens RE (1998) X-ray induced DNA double-strand breaks in human sperm. Mutagenesis 13:75–79
  • 17. Singh NP, Stephens RE, Schneider EL (1994) Modifications of alkaline microgel electrophoresis for sensitive detection of DNA damage. Int J Radiat Biol 66:23–28
  • 18. Singh NP, Tice RR, Stephens RE, Schneider EL (1991) A microgel electrophoresis technique for the direct quantitation of DNA damage and repair in individual fibroblasts cultured on microscope slides. Mutat Res 252:289–296
  • 19. Vijayalaxmi, Tice RR, Strauss GH (1992) Assessment of radiationinduced DNA damage in human blood lymphocytes using the single-cell gel electrophoresis technique. Mutat Res 271:243–252
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ6-0006-0022
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