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The Nobel Prize in medical science was awarded for revolutionary findings that clarify how the body's defense network attacks harmful pathogens while sparing the body's own cells.

Three renowned researchers—Japan's Shimon Sakaguchi and American scientists Dr. Brunkow and Fred Ramsdell—received this honor.

The research uncovered unique "sentinels" within the immune system that remove rogue immune cells capable of attacking the organism.

These discoveries are now paving the way for new treatments for autoimmune diseases and malignancies.

These laureates will share a prize fund worth 11 million SEK.

Decisive Findings

"Their research has been decisive for comprehending how the immune system operates and the reason we do not all develop serious autoimmune diseases," commented the head of the Nobel Committee.

This trio's studies explain a core question: How does the defense system protect us from numerous infections while keeping our healthy cells intact?

Our body's protection system uses white blood cells that search for signs of disease, even pathogens and germs it has never encountered.

These cells employ sensors—known as recognition units—that are generated randomly in a vast number of combinations.

This gives the defense network the capacity to fight a broad range of invaders, but the randomness of the mechanism unavoidably creates immune cells that can attack the host.

Security Guards of the Immune System

Scientists earlier understood that a portion of these problematic defense cells were eliminated in the immune organ—where immune cells mature.

The latest Nobel Prize honors the identification of T-reg cells—described as the immune system's "security guards"—which patrol the body to neutralize other immune cells that assault the body's own tissues.

We know that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

A prize committee added, "These findings have established a novel area of research and spurred the creation of new therapies, for example for cancer and immune disorders."

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

In self-attack disorders, trials are exploring increasing T-reg cells so the body is no longer being harmed. A comparable approach could also be effective in reducing the risks of transplanted organ failure.

Innovative Experiments

Professor Sakaguchi, from Osaka University, conducted tests on mice that had their immune gland removed, causing autoimmune disease.

He demonstrated that injecting immune cells from other mice could prevent the disease—suggesting there was a system for blocking immune cells from attacking the body.

Mary Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at a biotech firm in a California city, were investigating an inherited immune disorder in rodents and humans that resulted in the discovery of a genetic factor critical for how regulatory T-cells operate.

"The pioneering work has revealed how the body's defenses is kept in check by regulatory T cells, stopping it from mistakenly attacking the healthy cells," said a prominent biological science specialist.

"This research is a striking example of how fundamental physiological study can have broad consequences for public health."