What question did this study set out to answer?

To directly quantify the mutagenic effects of low-dose x-ray radiation in mammalian cells without relying on mathematical extrapolations from high-dose exposures.

July 1, 1986Proceedings of the National Academy of SciencesOpen Access

Measurement of low levels of x-ray mutagenesis in relation to human disease.

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Authors

CWCharles A. WaldrenColorado State University LCL A CorrellSalk Institute for Biological Studies MSMarguerite A. SognierUniversities Space Research Association

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Implication

In vitro study demonstrates over 200-fold higher mutational efficiency at low radiation doses in mammalian hybrid cells, suggesting underestimated risks from low-level environmental exposures.

Key Points

To directly quantify the mutagenic effects of low-dose x-ray radiation in mammalian cells without relying on mathematical extrapolations from high-dose exposures.
Utilized somatic cell hybrids containing a single human chromosome that carries marker genes.
Exposed cells to very low doses of ionizing radiation designed to minimize cell killing while capturing localized mutations, chromosomal deletions, and nondisjunctional events.
Mutational efficiency at low ionizing radiation doses approximating typical human exposures was over 200 times greater than estimates derived from conventional methods.
The dose-response curve demonstrated downward concavity with maximal mutational efficiency at low doses, directly contradicting classical linear and threshold models.

Cite This Study

Waldren et al. (1986) studied this question.

synapsesocial.com/papers/6a85892fc670f88be7ae6a0e https://doi.org/10.1073/pnas.83.13.4839

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Implication

In vitro study demonstrates over 200-fold higher mutational efficiency at low radiation doses in mammalian hybrid cells, suggesting underestimated risks from low-level environmental exposures.

Measurement of low levels of x-ray mutagenesis in relation to human disease.

Discussion

Member takes

Implication

Key Points

Cite This Study

Measurement of low levels of x-ray mutagenesis in relation to human disease.

Discussion

Member takes

Implication

Key Points

Cite This Study

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