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. 1989 Jan;134(1):7–10.

Nick translation detection in situ of cellular DNA strand break induced by radiation.

Y Maehara 1, H Anai 1, T Kusumoto 1, Y Sakaguchi 1, K Sugimachi 1
PMCID: PMC1879553  PMID: 2643885

Abstract

DNA strand break in HeLa cells induced by radiation was detected using the in situ nick translation method. The cells were exposed to radiation of 3, 6, 12, 18, and 24 Gy in Lab-Tek tissue culture chamber/slides and were fixed with ethanol/acetic acid on the slide glass. The break sites in DNA were translated artificially in the presence of Escherichia coli DNA polymerase I and [3H]-labeled dTTP. Autoradiographic observation was made of the level of break sites in the DNA. The DNA strand break appeared even with a 3 Gy exposure, increased 8.6 times at 24 Gy compared with the control cells, and this level correlated reciprocally to change in cell viability. This nick translation method provides a rapid in situ assay for determining radiation-induced DNA damage of cultured cells, in a semi-quantitative manner.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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