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The prestigious award in medical science has been granted for revolutionary findings that illuminate how the body's defense network attacks dangerous infections while protecting the healthy tissues.

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

Their work uncovered specialized "security guards" within the defense system that remove rogue immune cells capable of attacking the body.

These discoveries are now enabling innovative treatments for immune disorders and cancer.

The laureates will divide a monetary award valued at 11 million SEK.

Crucial Discoveries

"The research has been essential for comprehending how the immune system operates and the reason we do not all develop serious self-attack conditions," stated the chair of the award panel.

The trio's studies address a fundamental mystery: How does the immune system defend us from numerous infections while leaving our healthy cells unharmed?

Our immune system employs immune cells that search for indicators of disease, even pathogens and germs it has not met before.

Such cells employ detectors—known as recognition units—that are produced randomly in countless variations.

That gives the immune system the ability to fight a broad range of invaders, but the unpredictability of the mechanism inevitably produces white blood cells that can attack the body.

Protectors of the Immune System

Researchers earlier knew that some of these problematic defense cells were eliminated in the immune organ—where white blood cells mature.

This year's Nobel Prize recognizes the discovery of regulatory T-cells—described as the immune system's "peacekeepers"—which patrol the body to neutralize other defenders that attack the healthy cells.

It is known that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, MS, and RA.

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

Regarding malignancies, regulatory T-cells block the system from fighting the growth, so studies are aimed at reducing their numbers.

For self-attack disorders, experiments are exploring boosting regulatory T-cells so the organism is not under attack. A comparable approach could also be useful in reducing the risks of transplanted organ failure.

Innovative Experiments

Professor Shimon Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus extracted, leading to autoimmune disease.

The researcher showed that introducing defense cells from healthy animals could prevent the disease—implying there was a system for preventing immune cells from attacking the host.

Mary Brunkow, from the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an genetic immune disorder in mice and humans that resulted in the discovery of a gene vital for how regulatory T-cells function.

"Their groundbreaking work has uncovered how the immune system is controlled by T-reg cells, preventing it from accidentally targeting the healthy cells," said a leading biological science expert.

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