Changes in DNA methylation linked to accelerated ageing in mice and people
A study published in Nature Genetics reports that gain-of-function DNMT3A mutations, which affect DNA methylation, show signs of accelerated ageing in patients and mice.
Source: DNA Methylation Changes Linked to Accelerated Ageing in Mice and People (nature.com). Summary written with AI from the source and reviewed by rules; read the original.
What the research shows
A study published in Nature Genetics looked at mutations in the DNMT3A gene that increase the activity of its protein. This protein takes part in DNA methylation, a set of chemical marks that help control which genes are switched on. According to the study, people carrying these mutations and mice with the same mutations show features of accelerated ageing. The researchers also observed hypermethylation, meaning an excess of these marks, in specific regions of DNA, and linked this pattern to dysfunction of stem cells, the cells that renew tissues throughout life.
The available text summarises the study briefly, without details on the number of participants, the length of follow-up or the statistical strength of the results. What is known therefore comes from a general description. Because the study includes animals, findings in mice cannot be automatically applied to people. The authors suggest a possible causal role for epigenetic changes in age-related decline, but such a suggestion still needs confirmation from further research. The topic matters for healthy ageing because it helps explain how molecular changes relate to growing older.
What it means
The study suggests that changes in DNA methylation may contribute to accelerated ageing and to loss of stem cell function. It is still unclear whether these changes cause ageing or simply accompany it, and whether similar results would hold across the wider population.
How to read it with care
This result is preliminary and does not replace a medical consultation. Anyone with questions about health, ageing, or changes in diet, supplements or treatment should talk to a doctor or another qualified professional.