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This year's prestigious award in medical science has been awarded for transformative discoveries that illuminate how the immune system targets harmful infections while sparing the body's own cells.

Three renowned researchers—Japan's Prof. Sakaguchi and US scientists Mary Brunkow and Fred Ramsdell—share this accolade.

The research identified specialized "sentinels" within the defense system that eliminate rogue immune cells that could attacking the organism.

These discoveries are now paving the way for new treatments for immune disorders and malignancies.

These winners will divide a monetary award valued at 11m SEK.

Crucial Discoveries

"Their work has been decisive for understanding how the body's defenses operates and why we do not all suffer from serious autoimmune diseases," stated the chair of the award panel.

The team's research explain a fundamental question: In what way does the immune system protect us from countless infections while leaving our healthy cells intact?

Our body's protection system employs white blood cells that scan for indicators of disease, even viruses and bacteria it has not met before.

Such cells employ sensors—known as recognition units—that are produced by chance in a vast number of combinations.

This gives the immune system the capacity to combat a broad range of invaders, but the randomness of the process inevitably produces immune cells that can target the host.

Protectors of the Immune System

Scientists previously understood that a portion of these harmful defense cells were destroyed in the immune organ—the site where white blood cells mature.

The latest Nobel Prize recognizes the identification of regulatory T-cells—described as the immune system's "peacekeepers"—which travel through the system to disarm any defenders that assault the healthy cells.

It is known that this mechanism fails in self-attack conditions such as juvenile diabetes, multiple sclerosis, and rheumatoid arthritis.

A prize committee added, "The findings have laid the foundation for a novel area of research and accelerated the creation of new treatments, for example for cancer and autoimmune diseases."

In malignancies, T-regs prevent the system from attacking the growth, so studies are aimed at reducing their quantity.

In autoimmune diseases, trials are exploring boosting T-reg cells so the organism is no longer being harmed. A similar method could also be effective in reducing the chances of organ transplant rejection.

Pioneering Experiments

Professor Shimon Sakaguchi, of a Japanese institution, conducted experiments on rodents that had their immune gland removed, causing self-attack conditions.

The researcher showed that injecting immune cells from other mice could prevent the illness—implying there was a mechanism for preventing immune cells from harming the host.

Dr. Brunkow, affiliated with the a research center in a US city, and Fred Ramsdell, now at a biotech firm in San Francisco, were investigating an inherited autoimmune disease in rodents and humans that resulted in the identification of a genetic factor critical for the way regulatory T-cells operate.

"Their pioneering work has revealed how the immune system is controlled by T-reg cells, preventing it from mistakenly attacking the healthy cells," said a prominent physiology expert.

"The research is a striking illustration of how basic biological research can have broad consequences for public health."