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Mutation frequency in human lymphocytes increases with age.

K J Trainor, D J Wigmore, A Chrysostomou

Mechanisms of Ageing and Development

|September 1, 1984

Summary

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Somatic mutations, or changes in DNA, increase with age in human lymphocytes. This study detected a 1.6% annual rise in these mutations, supporting ageing theories.

Area of Science:

Gerontology
Molecular Biology
Genetics

Background:

Ageing is associated with accumulating cellular damage.
Somatic mutations are a key type of cellular damage.
Theories of ageing predict a correlation between age and somatic mutation accumulation.

Purpose of the Study:

To investigate the relationship between ageing and somatic mutations in human lymphocytes.
To test predictions from ageing theories regarding mutation rates.

Main Methods:

Utilized a novel clonal technique for precise enumeration of mutations.
Analyzed somatic mutations in human lymphocytes across different age groups.

Main Results:

Detected a statistically significant increase in somatic mutations with advancing age.

Related Experiment Videos

Quantified an average increase of 1.6% per year in lymphocyte mutations.

Conclusions:

The findings support the hypothesis that somatic mutations accumulate with age.
This accumulation may be a contributing factor to the ageing process.
The developed clonal technique provides a reliable method for mutation assessment.