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This year's prestigious award in medical science has been awarded for revolutionary discoveries that illuminate how the body's defense network attacks dangerous pathogens while sparing the healthy tissues.

A trio of renowned researchers—Japan's Prof. Sakaguchi and American scientists Dr. Brunkow and Dr. Ramsdell—received this honor.

The work uncovered unique "security guards" within the defense system that eliminate rogue defense cells capable of attacking the body.

These findings are now paving the way for innovative therapies for immune disorders and cancer.

The laureates will divide a monetary award valued at 11m SEK.

Decisive Discoveries

"Their work has been essential for understanding how the body's defenses operates and the reason we don't all suffer from severe autoimmune diseases," commented the chair of the Nobel Committee.

The team's research address a core mystery: How does the immune system protect us from countless infections while leaving our healthy cells intact?

The immune system uses immune cells that scan for indicators of disease, even pathogens and germs it has never encountered.

These defenders utilize sensors—known as recognition units—that are generated randomly in a vast number of variations.

That provides the defense network the ability to fight a broad range of threats, but the unpredictability of the process inevitably creates white blood cells that can attack the body.

Security Guards of the Body

Scientists earlier understood that a portion of these harmful white blood cells were eliminated in the thymus—where white blood cells mature.

The latest Nobel Prize recognizes the discovery of T-reg cells—known as the immune system's "peacekeepers"—which travel through the body to neutralize other immune cells that attack the healthy cells.

We know that this process malfunctions in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

A Nobel panel added, "The discoveries have established a novel area of investigation and accelerated the development of innovative therapies, for example for cancer and autoimmune diseases."

Regarding malignancies, regulatory T-cells prevent the body from attacking the tumor, so studies are focused on reducing their numbers.

In autoimmune diseases, experiments are exploring boosting regulatory T-cells so the organism is no longer being harmed. A similar approach could also be effective in minimizing the risks of organ transplant failure.

Innovative Experiments

Professor Sakaguchi, of Osaka University, conducted experiments on rodents that had their thymus removed, leading to autoimmune disease.

The researcher showed that injecting defense cells from healthy mice could prevent the disease—implying there was a system for preventing defenders from attacking the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited immune disorder in rodents and humans that resulted in the identification of a gene critical for the way T-regs function.

"Their groundbreaking research has revealed how the immune system is controlled by T-reg cells, stopping it from mistakenly targeting the body's own tissues," commented a prominent physiology expert.

"The work is a remarkable illustration of how basic biological research can have far-reaching consequences for public health."