DNA damage induction and tumour cell radiosensitivity: PFGE and halo measurements

EC Woudstra, C Driessen, AWT Konings, HH Kampinga*

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    15 Citations (Scopus)

    Abstract

    Purpose: To test whether induction of DNA damage is correlated with tumour-cell radiosensitivity.

    Materials and methods: Initial DNA damage caused by X-irradiation was measured in ten human tumour cell lines, which largely differed in radiosensitivity, using either the pulsed-field gel electrophoresis assay or the halo technique.

    Results: None of the parameters of DNA damage correlated with any parameter of cellular radiosensitivity. This was not only true when the analysis was performed on all data but also when the analysis was performed after separating the cell lines into radioresistant and sensitive groups. Even when differences in chromosome number, ploidy and cell cycle distribution were taken into account, no significant correlations were obtained.

    Conclusions: Contrary to previous suggestions, differences in the number of double-strand breaks induced or chromatin-related 'presentation' of DNA lesions, measured by pulsed-field gel electrophoresis or halo respectively, are generally not the dominant factors determining tumour-cell radiosensitivity.

    Original languageEnglish
    Pages (from-to)495-502
    Number of pages8
    JournalInternational Journal of Radiation Biology
    Volume73
    Issue number5
    Publication statusPublished - May-1998

    Keywords

    • FIELD GEL-ELECTROPHORESIS
    • STRAND BREAK INDUCTION
    • CHEF ELECTROPHORESIS
    • IONIZING-RADIATION
    • LINES
    • ORGANIZATION
    • IRRADIATION
    • SENSITIVITY
    • NUCLEAR
    • REPAIR

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