A Tiny Chest Organ May Hold Secrets to Longevity, New Nature Research Shows

The Overlooked Immune Guardian

According to НВ — Техно: Inside the human body, a small organ may play a far bigger role in how long we live than previously recognized. The thymus sits in the upper chest and helps build the immune system in childhood, but it gradually shrinks with age-so much so that scientists once dismissed it as a "graveyard of immune cells." The thymus is often overlooked in adult medicine, and researchers are now making the case that this forgotten gland deserves much more attention.

Publication date: August 4, 15:30.

Led by oncologist Hugo Aerts of Harvard, the research team analyzed health records from more than 27,000 people participating in two major long-term studies. Using CT scans, they trained an artificial intelligence system to assess how well the thymus was functioning. Based on these assessments, participants were sorted into groups with low, medium, or high thymus health.

What the Findings Show

The differences were striking. People with the healthiest thymuses were roughly twice as likely to survive the next 12 years as those with the lowest thymus health. Their risk of developing lung cancer was about one-third lower, and their risk of dying from cardiovascular disease dropped by 63 percent in one study and 92 percent in the other.

Several factors appeared to harm the thymus, including:

• smoking
• obesity
• chronic inflammation

These findings underline that keeping the thymus in good shape could be an important part of improving overall health and extending lifespan. They also point toward new possibilities for preventing and treating age-related diseases, and for developing strategies that support the immune system. Further research will be needed to find out whether improving thymus function can in turn boost the health of the general population.