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The Nobel Prize in medical science was awarded for revolutionary findings that illuminate how the immune system attacks dangerous infections while sparing the healthy tissues.

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

The work uncovered specialized "sentinels" within the immune system that eliminate rogue immune cells that could attacking the body.

These findings are now enabling innovative therapies for autoimmune diseases and malignancies.

These laureates will share a monetary award valued at 11m SEK.

Decisive Findings

"Their work has been decisive for comprehending how the immune system functions and why we don't all suffer from serious self-attack conditions," stated the head of the Nobel Committee.

This trio's research explain a fundamental mystery: How does the immune system defend us from numerous infections while keeping our healthy cells unharmed?

Our immune system uses immune cells that search for indicators of infection, including pathogens and germs it has not met before.

Such cells utilize sensors—called receptors—that are produced by chance in countless combinations.

That provides the immune system the ability to fight a broad range of threats, but the unpredictability of the process inevitably produces immune cells that can attack the body.

Security Guards of the Body

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

This year's award recognizes the identification of T-reg cells—known as the immune system's "peacekeepers"—which travel through the body to disarm other defenders that assault the body's own tissues.

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

A Nobel panel added, "The discoveries have laid the foundation for a new field of research and spurred the development of innovative therapies, for example for cancer and immune disorders."

In cancer, regulatory T-cells prevent the system from fighting the growth, so research are aimed at reducing their quantity.

For self-attack disorders, experiments are exploring boosting T-reg cells so the body is not being harmed. A comparable approach could also be effective in reducing the chances of organ transplant failure.

Pioneering Studies

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

The researcher showed that injecting defense cells from healthy animals could prevent the disease—suggesting there was a system for blocking immune cells from harming the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were investigating an inherited immune disorder in mice and people that resulted in the identification of a gene vital for the way regulatory T-cells function.

"The groundbreaking work has uncovered how the immune system is kept in check by regulatory T cells, stopping it from accidentally attacking the body's own tissues," commented a leading physiology specialist.

"The research is a remarkable example of how fundamental biological study can have far-reaching implications for human health."