Immune System Halts Rapid Aging Process

New research shows dialing down an overactive immune sensor can restore tissue health in severe genetic disorders

Apr. 16, 2026 at 5:09am

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A translucent, ghostly X-ray image showing the intricate internal structures of a human cell, conceptually illustrating how the body's inflammatory response to damaged DNA can drive tissue degeneration.An X-ray view into the cellular mechanisms that drive rapid aging reveals the body's own inflammatory defenses as a central culprit.Los Angeles Today

New research from an international team led by scientists at Hebrew University has identified an overactive immune response as a central driver of tissue degeneration in severe, rapid-aging disorders. By reducing this false alarm, the researchers were able to restore function across multiple biological systems, challenging the long-held belief that DNA damage alone causes cellular decline.

Why it matters

The findings have significant implications for treating rare genetic disorders marked by premature aging, as well as potentially broader relevance for age-related diseases where chronic inflammation and genomic instability often coexist. Rather than attempting to repair every DNA lesion, therapies could focus on modulating the body's inflammatory response to damage.

The details

The researchers found that when DNA repair fails, fragments of DNA can leak into the cell's cytosol and activate a molecular sensor known as cGAS. This pathway typically detects viral DNA but cannot reliably distinguish between foreign and self-derived fragments, resulting in a sustained, sterile inflammatory response that damages tissues. The team also discovered that cGAS can directly interfere with DNA repair processes, making it both a protector under normal conditions and a driver of damage when the system is overwhelmed.

  • The research was led by an international team at Hebrew University, in collaboration with researchers from the University of Southern California.

The players

Dr. Marva Bergman

Lead researcher from the Hebrew University team.

Prof. Itamar Harel

Lead researcher from the Hebrew University team.

Prof. Yehuda Tzfati

Researcher from the Hebrew University team.

Prof. Ido Ben-Ami

Researcher from the Hebrew University and Sha'are Zedek Medical Center.

Prof. Bérénice Benayoun

Researcher from the University of Southern California.

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What they’re saying

“Our results show that the damage isn't acting alone. It's the body's response to that damage, an exaggerated, chronic inflammatory reaction, that drives much of the degeneration.”

— Prof. Itamar Harel, Lead researcher, Hebrew University

“We weren't just slowing decline. We saw broad restoration of tissue function. It suggests that the body can cope with more DNA damage than we assumed, if the inflammatory response is kept in check.”

— Dr. Marva Bergman, Lead researcher, Hebrew University

What’s next

The researchers caution that cGAS also plays a critical role in antiviral defense, meaning that future therapies will need to selectively dampen harmful activity without compromising immunity.

The takeaway

This study challenges the long-held belief that DNA damage alone causes cellular decline, and instead identifies the body's exaggerated inflammatory response to that damage as a central driver of tissue degeneration in severe, rapid-aging disorders. By moderating this response, the researchers were able to restore function across multiple biological systems, opening a promising new direction for treating some of the most challenging degenerative conditions.