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The prestigious award in medical science has been awarded for revolutionary discoveries that illuminate how the body's defense network targets dangerous infections while protecting the body's own cells.

Three renowned scientists—from Japan Prof. Sakaguchi and American experts Mary Brunkow and Dr. Ramsdell—share this honor.

Their work identified unique "sentinels" within the immune system that remove malfunctioning immune cells that could attacking the body.

These findings are now paving the way for new therapies for autoimmune diseases and cancer.

These laureates will share a prize fund valued at 11m SEK.

Crucial Findings

"Their work has been essential for comprehending how the immune system functions and why we do not all suffer from serious self-attack conditions," commented the head of the award panel.

The trio's research explain a fundamental question: How does the immune system protect us from countless infections while leaving our own tissues unharmed?

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

Such cells utilize detectors—known as recognition units—that are produced randomly in countless combinations.

This provides the defense network the ability to fight a wide array of threats, but the randomness of the mechanism unavoidably creates immune cells that may target the host.

Protectors of the Immune System

Scientists previously knew that a portion of these harmful white blood cells were eliminated in the thymus—the site where immune cells develop.

The latest Nobel Prize recognizes the identification of regulatory T-cells—known as the body's "peacekeepers"—which travel through the body to neutralize other immune cells that assault the body's own tissues.

It is known that this process malfunctions in self-attack conditions such as type-1 diabetes, MS, and RA.

A Nobel panel stated, "The discoveries have laid the foundation for a novel area of research and accelerated the creation of new treatments, for example for cancer and immune disorders."

In cancer, T-regs prevent the system from fighting the growth, so studies are focused on lowering their quantity.

For self-attack disorders, experiments are testing boosting T-reg cells so the organism is no longer being harmed. A comparable approach could also be useful in reducing the chances of organ transplant failure.

Pioneering Experiments

Prof Shimon Sakaguchi, of Osaka University, performed tests on mice that had their immune gland removed, leading to autoimmune disease.

The researcher showed that introducing defense cells from healthy animals could stop the illness—suggesting there was a system for preventing immune cells from attacking the body.

Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited autoimmune disease in mice and people that led to the identification of a gene vital for the way T-regs function.

"The pioneering research has revealed how the immune system is controlled by regulatory T cells, preventing it from mistakenly targeting the healthy cells," said a leading biological science specialist.

"The research is a remarkable example of how basic physiological research can have far-reaching implications for public health."