Ionizing radiation, present in medical procedures such as X-rays and in certain work activities, may be linked to an increased risk of developing dementia, according to a recent scientific review. The study compiled epidemiological research to analyze the impact of cumulative radiation dose on cognitive health and its possible link to dementia. neurodegenerative diseasesThe findings open new debates in the scientific community about the long-term safety of these everyday and industrial exposures.
The document, published in the scientific journal Frontiers in Immunology, highlights a meta-analysis of eighteen studies that recorded an eleven percent relative increase in the risk of dementia for every one hundred millisieverts of cumulative exposure. The authors clarify that this percentage measures the variation in risk among different population levels and does not predict an individual's probability of developing the disease. Furthermore, the data encompass various types of medical and environmental diagnoses without focusing exclusively on a single neurological disorder.
The research delves into the biological mechanisms by which high-frequency energy alters brain cells and generates oxidative stress. Experiments indicate that DNA damage stimulates the release of a protein known as eCIRP, which activates inflammatory responses and promotes the phosphorylation of tau, a molecule closely linked to Alzheimer's disease. Although the evidence suggests a direct correlation, experts emphasize the need for caution regarding potential external factors such as the presence of heavy metals in work environments.
Cellular mechanisms and occupational exposure
The analysis details that the amount of energy absorbed varies drastically depending on each person's context, ranging from medical CT scans involving two millisieverts to decades of work in industrial plants. Long-term follow-up studies of more than 80,000 nuclear industry workers in France and uranium processing workers in North America recorded high rates of dementia-related mortality. However, specialists emphasize that further research is needed to isolate the impact of radiation from other chemical substances present in these work environments.
