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The prestigious award in medical science was granted for transformative discoveries that clarify how the body's defense network attacks harmful infections while protecting the healthy tissues.

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

The work identified unique "sentinels" within the immune system that remove rogue defense cells capable of harming the body.

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

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

Decisive Findings

"The research has been decisive for comprehending how the immune system functions and why we do not all develop serious autoimmune diseases," stated the head of the Nobel Committee.

This team's research explain a core question: How does the immune system protect us from countless invaders while keeping our own tissues intact?

The immune system uses immune cells that search for signs of infection, even pathogens and germs it has never encountered.

Such cells utilize detectors—known as receptors—that are generated randomly in a vast number of variations.

This gives the immune system the capacity to combat a wide array of threats, but the unpredictability of the process inevitably produces white blood cells that can attack the body.

Security Guards of the Body

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

The latest award recognizes the identification of regulatory T-cells—known as the body's "security guards"—which travel through the body to neutralize other immune cells that assault the body's own tissues.

We know that this mechanism malfunctions in self-attack conditions such as juvenile diabetes, MS, and rheumatoid arthritis.

A prize committee added, "These discoveries have established a new field of research and accelerated the development of new treatments, for instance for cancer and immune disorders."

In malignancies, regulatory T-cells block the system from fighting the growth, so research are aimed at lowering their quantity.

In self-attack disorders, experiments are testing increasing T-reg cells so the body is no longer being harmed. A similar method could also be effective in reducing the chances of transplanted organ rejection.

Pioneering Studies

Professor Sakaguchi, of a Japanese institution, conducted tests on mice that had their thymus extracted, leading to autoimmune disease.

The researcher demonstrated that introducing immune cells from healthy animals could prevent the disease—implying there was a mechanism for preventing defenders from attacking the host.

Dr. Brunkow, from the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited immune disorder in rodents and humans that resulted in the identification of a gene vital for how regulatory T-cells function.

"The groundbreaking work has revealed how the immune system is kept in check by regulatory T cells, stopping it from mistakenly targeting the healthy cells," commented a prominent physiology expert.

"This work is a remarkable illustration of how basic physiological research can have broad implications for human health."