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This year's prestigious award in medical science was awarded for revolutionary discoveries that clarify how the body's defense network attacks harmful pathogens while sparing the body's own cells.

Three renowned researchers—from Japan Shimon Sakaguchi and US experts Dr. Brunkow and Dr. Ramsdell—share this accolade.

Their research identified specialized "sentinels" within the immune system that remove rogue immune cells capable of harming the body.

The findings are now enabling innovative treatments for autoimmune diseases and malignancies.

The winners will share a monetary award worth 11 million SEK.

Decisive Findings

"The research has been decisive for comprehending how the immune system functions and the reason we do not all develop severe autoimmune diseases," stated the chair of the Nobel Committee.

The trio's studies explain a fundamental mystery: In what way does the defense system protect us from countless invaders while keeping our healthy cells intact?

The immune system employs white blood cells that scan for signs of disease, even viruses and bacteria it has never encountered.

These defenders employ detectors—called receptors—that are generated randomly in countless variations.

That provides the defense network the ability to combat a broad range of threats, but the unpredictability of the process unavoidably produces white blood cells that can attack the host.

Security Guards of the Immune System

Researchers earlier knew that a portion of these harmful defense cells were destroyed in the immune organ—the site where immune cells mature.

This year's Nobel Prize recognizes the discovery of T-reg cells—described as the body's "security guards"—which travel through the system to disarm other immune cells that assault the body's own tissues.

We know that this mechanism malfunctions in self-attack conditions such as juvenile diabetes, MS, and rheumatoid arthritis.

A prize committee stated, "The discoveries have laid the foundation for a novel area of investigation and accelerated the development of new therapies, for example for cancer and autoimmune diseases."

In cancer, regulatory T-cells block the system from fighting the tumor, so research are focused on lowering their quantity.

For autoimmune diseases, experiments are testing increasing T-reg cells so the organism is no longer under attack. A comparable method could also be effective in reducing the chances of transplanted organ rejection.

Pioneering Studies

Prof Shimon Sakaguchi, from a Japanese institution, performed experiments on mice that had their thymus extracted, causing autoimmune disease.

He demonstrated that introducing defense cells from healthy animals could prevent the illness—suggesting there was a system for blocking defenders from harming the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Dr. Ramsdell, currently at a biotech firm in a California city, were studying an genetic autoimmune disease in mice and humans that resulted in the discovery of a gene vital for the way T-regs function.

"Their pioneering research has uncovered how the immune system is kept in check by regulatory T cells, preventing it from mistakenly attacking the body's own tissues," commented a prominent physiology specialist.

"This work is a striking illustration of how basic biological study can have broad implications for human health."