Immune System’s Role Uncovered in Accelerating Aging Linked to Genetic Disorders by Jerusalem Researchers

Excessive Immune Activation Drives Premature Aging

According to НВ — Техно: Scientists at the Hebrew University of Jerusalem have discovered that an overactive immune response to DNA damage can hasten aging in certain rare genetic conditions. Their study focused on disorders where DNA repair mechanisms are impaired, including ataxia-telangiectasia and Bloom syndrome. They identified the protein cGAS as a crucial trigger for chronic inflammation that worsens DNA repair deficits.

The Impact of cGAS on Cellular Aging

The research revealed that unrepaired DNA fragments leak into the cell’s cytoplasm, where cGAS detects them and initiates inflammatory signaling. A major issue is that cGAS cannot always distinguish the body’s own DNA from foreign DNA, leading to persistent inflammation even in the absence of infection. Additionally, cGAS can enter the cell nucleus and interfere directly with DNA repair processes.

By experimentally reducing cGAS activity in models of accelerated aging diseases, researchers observed improvements in tissue health, including reduced neuroinflammation, less tissue degeneration, and better reproductive function. However, completely blocking cGAS is not viable because it plays an essential role in defending the body against viral infections.

“DNA damage alone may not fully explain the decline in organismal health. The body’s response to this damage appears to play a significant role,” noted researcher Itamar Harel.

The findings suggest that the detrimental effects of DNA damage are amplified by the immune system’s reaction, linking chronic inflammation to age-related decline. This insight opens new avenues for understanding how DNA damage, immune response, and aging are interconnected.

The study was published on September 17 at 15:09 in the journal Science Alert. While the research primarily focuses on rare genetic diseases, it holds promise for developing novel treatments that target immune system regulation rather than directly repairing DNA.

This breakthrough by the Jerusalem-based team provides fresh perspectives on the biological mechanisms behind aging and genetic disorders. The identified interaction between cGAS and inflammatory pathways could pave the way for therapies aimed at modulating immune activity, potentially reducing the risks associated with premature aging and inherited conditions. Such approaches may revolutionize future treatment paradigms by emphasizing immune control over conventional DNA repair strategies.

In light of these findings, it is crucial to explore how immune responses contribute to neurological conditions. Similar mechanisms may be at play in other diseases, such as Alzheimer's, where peripheral immune cells can instigate inflammation and damage in the brain. Understanding these interactions could shed light on potential therapeutic strategies to mitigate age-related decline and neurodegenerative disorders.