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This year's Nobel Prize in medical science was granted for transformative discoveries that clarify how the body's defense network targets harmful pathogens while protecting the healthy tissues.

A trio of renowned researchers—Japan's Prof. Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—share this honor.

Their work uncovered specialized "security guards" within the immune system that remove malfunctioning immune cells that could attacking the organism.

The findings are now paving the way for new therapies for autoimmune diseases and malignancies.

These winners will share a prize fund valued at 11m Swedish kronor.

Crucial Discoveries

"Their research has been essential for understanding how the immune system functions and the reason we do not all suffer from serious self-attack conditions," stated the head of the Nobel Committee.

This team's studies explain a core question: In what way does the immune system protect us from numerous infections while keeping our healthy cells intact?

The body's protection system uses white blood cells that search for signs of disease, even pathogens and bacteria it has not met before.

These cells utilize detectors—called receptors—that are produced randomly in countless combinations.

That provides the defense network the ability to fight a broad range of invaders, but the randomness of the mechanism unavoidably creates white blood cells that can target the host.

Protectors of the Body

Scientists earlier knew that some of these harmful white blood cells were eliminated in the immune organ—where white blood cells mature.

The latest award recognizes the discovery of regulatory T-cells—described as the body's "security guards"—which patrol the body to disarm any immune cells that attack the body's own tissues.

We know that this mechanism malfunctions in self-attack conditions such as type-1 diabetes, multiple sclerosis, and RA.

A Nobel panel added, "The findings have established a new field of research and spurred the creation of new treatments, for instance for cancer and autoimmune diseases."

Regarding cancer, regulatory T-cells prevent the system from attacking the tumor, so research are aimed at reducing their quantity.

In autoimmune diseases, trials are exploring boosting T-reg cells so the organism is not being harmed. A similar method could also be useful in reducing the risks of transplanted organ failure.

Innovative Experiments

Prof Shimon Sakaguchi, from Osaka University, conducted tests on rodents that had their thymus extracted, leading to autoimmune disease.

The researcher demonstrated that introducing defense cells from healthy animals could stop the disease—suggesting there was a mechanism for preventing defenders from attacking the body.

Dr. Brunkow, affiliated with the a research center in a US city, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an inherited immune disorder in rodents and people that resulted in the discovery of a genetic factor vital for how 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 body's own tissues," commented a prominent physiology expert.

"The research is a striking illustration of how fundamental physiological research can have far-reaching implications for public health."