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James Neel and the doubling dose concept.

¹MRC Mammalian Genetics Unit, Harwell, Didcot OX11 0RD, UK. m.lyon@har.mrc.ac.uk

Mutation Research

|March 20, 2003

Summary

The doubling dose (DD) concept helps assess human genetic radiation risks. However, studies show different DD values apply to different genetic endpoints, challenging earlier assumptions.

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Area of Science:

Human genetics
Radiation biology
Risk assessment

Background:

The doubling dose (DD) is a key metric for evaluating genetic risks from radiation exposure in humans.
Historically, it was assumed that DD values derived from mouse specific locus experiments were directly applicable to human populations.

Discussion:

James Neel's research on atomic bomb survivors revealed that a single DD value is insufficient.
Different genetic endpoints yield varying DD estimates, indicating a more complex relationship between radiation and genetic mutation.

Key Insights:

The direct extrapolation of mouse-derived doubling dose values to humans is not scientifically valid.
Genetic risk assessment in humans requires considering specific endpoints and their unique responses to radiation.

Outlook:

Future research should focus on refining DD estimates for diverse human genetic endpoints.
Developing more precise models for human radiation genetic risk assessment is crucial.

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