Boosting DNA Repair May Hold the Key to Extending Healthy Lifespan
Scientists argue that strengthening the body's DNA-repair systems could slow aging, citing evidence from long-lived animals and human centenarians.
The article outlines how constant exposure to ultraviolet light, toxins and metabolic by-products damages DNA, triggering cellular responses that drive aging and disease. Cells can fix up to 100,000 lesions daily using six major repair pathways, yet the efficiency of these systems declines with age. Research on exceptionally long-lived organisms such as bowhead whales and naked mole rats, as well as genetic analyses of human centenarians, reveals superior double-strand break repair and advantageous variants of enzymes like SIRT6.
Laboratory experiments show that seaweed-derived fucoidans boost SIRT6 activity, enhancing DNA repair and extending lifespan in mice, prompting a clinical study in men aged 50-80. A separate study demonstrated that disabling the DREAM complex up-regulates many repair genes, offering a potential master-switch for genome maintenance. While these findings energize the field, experts note the intricate interplay of multiple repair pathways and the need for further research before safe human applications can be realized.
Why it matters
Improving DNA repair could delay age-related illnesses and increase the years people live in good health.
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