Slightly increased level of DNA migration in the comet assay: does statistical significance equal biological significance?

ABSTRACT: In the comet assay, DNA damage is assessed by differences in DNA migration from gel-embedded nucleoids. Even a small difference in DNA migration between exposure groups can be statistically significant but may invite speculation about the biological significance of such slight increases in DNA migration. A small difference can be defined as a net difference of 1-2% Tail DNA, but background levels of DNA migration typically vary already more than 1-2% Tail DNA between studies. Here, we have used studies on ionizing radiation to assess the lowest detectable differences in DNA migration; variation in exposure-effect relationships; variation in central tendencies of DNA migration; unsystematic (residual) variation; and the actual number of lesions detectable with the comet assay. A total of 51

SUBMITTER: Moller P 

PROVIDER: S-EPMC12022222 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature