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This year's prestigious award in medical science was awarded for transformative discoveries that clarify how the immune system attacks dangerous pathogens while sparing the healthy tissues.

A trio of esteemed scientists—Japan's Shimon Sakaguchi and US scientists Mary Brunkow and Fred Ramsdell—share this accolade.

The research identified unique "security guards" within the defense system that remove malfunctioning defense cells that could attacking the organism.

These discoveries are now enabling innovative therapies for immune disorders and malignancies.

The winners will share a monetary award valued at 11 million SEK.

Decisive Findings

"The work has been essential for comprehending how the immune system operates and why we don't all develop serious self-attack conditions," stated the chair of the award panel.

This team's research address a fundamental mystery: In what way does the immune system protect us from countless infections while leaving our healthy cells unharmed?

Our immune system employs white blood cells that search for signs of infection, including pathogens and bacteria it has not met before.

Such defenders utilize sensors—called receptors—that are produced by chance in a vast number of variations.

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

Security Guards of the Body

Researchers earlier understood that some of these problematic white blood cells were eliminated in the thymus—the site where immune cells develop.

This year's Nobel Prize honors the identification of T-reg cells—known as the immune system's "peacekeepers"—which patrol the system to neutralize any immune cells that assault the healthy cells.

We know that this process malfunctions in self-attack conditions such as type-1 diabetes, MS, and RA.

A Nobel panel added, "The findings have laid the foundation for a new field of research and spurred the development of new treatments, for instance for tumors and autoimmune diseases."

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

In autoimmune diseases, experiments are exploring boosting T-reg cells so the body is no longer being harmed. A similar method could also be effective in minimizing the chances of transplanted organ failure.

Pioneering Studies

Prof Sakaguchi, of a Japanese institution, performed experiments on rodents that had their immune gland extracted, leading to autoimmune disease.

The researcher demonstrated that injecting defense cells from healthy animals could stop the disease—implying there was a system for preventing immune cells from attacking the host.

Mary Brunkow, affiliated with the a research center in a US city, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were studying an genetic autoimmune disease in rodents and people that resulted in the identification of a gene critical for the way regulatory T-cells operate.

"Their groundbreaking work has uncovered how the body's defenses is controlled by T-reg cells, stopping it from mistakenly targeting the healthy cells," said a leading biological science expert.

"The work is a remarkable example of how basic physiological study can have broad consequences for public health."