Document Detail

Direct use of the comet assay to study cell cycle distribution and its application to study cell cycle-dependent DNA damage formation.
MedLine Citation:
PMID:  22511614     Owner:  NLM     Status:  Publisher    
The comet assay or single cell gel electrophoresis has proven to be a versatile and sensitive method of measuring the induction and repair of DNA damage in individual cells. However, one of the drawbacks of the assay is the bias caused by changes in the ability of cells to repair DNA damage in different cell cycle phases. Whereas the bias seems less important when G0 peripheral blood lymphocytes are studied, it might cause problems when proliferating cells are investigated. In this paper, we validate the assumption that the total comet fluorescence intensity corresponds to the position of the cell in the cell cycle and can be used to assign single cells to specific cell cycle phases. To validate the approach, we used a very homogenous blood mononuclear CD34(+) cell population in G0 phase (unstimulated) or stimulated to enter the cell cycle. An analysis of the cell cycle distribution revealed that the 15 comet intensity classes and the 100 comets usually analyzed in a typical comet experiment are sufficient to obtain a reliable cell cycle distribution comparable with the results obtained by the flow cytometry for the same cell population. The effect of the cell cycle position on the results obtained by the comet assay for proliferating and non-proliferating cell populations irradiated with 3 Gy of X-radiation is also discussed.
Marcin Kruszewski; Teresa Iwanenko; Eugeniusz K Machaj; Tomasz Oldak; Maria Wojewódzka; Lucyna Kapka-Skrzypczak; Zygmunt Pojda
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-17
Journal Detail:
Title:  Mutagenesis     Volume:  -     ISSN:  1464-3804     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8707812     Medline TA:  Mutagenesis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, 16 Dorodna Street, 03-195, Warszawa, Poland.
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