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The Nobel Prize in medical science was awarded for revolutionary discoveries that clarify how the immune system attacks harmful infections while protecting the healthy tissues.

A trio of renowned researchers—from Japan Shimon Sakaguchi and American scientists Dr. Brunkow and Dr. Ramsdell—share this honor.

Their work uncovered unique "security guards" within the immune system that remove rogue immune cells that could attacking the body.

These discoveries are now paving the way for innovative treatments for immune disorders and malignancies.

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

Crucial Findings

"The work has been essential for understanding how the body's defenses operates and why we don't all suffer from serious self-attack conditions," commented the chair of the award panel.

This trio's research explain a core question: How does the immune system protect us from numerous infections while keeping our healthy cells intact?

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

Such defenders utilize detectors—called recognition units—that are produced by chance in countless variations.

This gives the immune system the capacity to combat a wide array of invaders, but the unpredictability of the mechanism inevitably produces immune cells that can attack the body.

Security Guards of the Immune System

Scientists earlier understood that some of these problematic defense cells were eliminated in the thymus—where white blood cells mature.

This year's Nobel Prize recognizes the discovery of regulatory T-cells—known as the immune system's "security guards"—which travel through the system to neutralize any defenders that assault the healthy cells.

We know that this mechanism malfunctions in self-attack conditions such as type-1 diabetes, MS, and rheumatoid arthritis.

The prize committee added, "The findings have established a new field of investigation and spurred the development of innovative therapies, for example for cancer and autoimmune diseases."

Regarding malignancies, regulatory T-cells block the body from attacking the tumor, so studies are aimed at reducing their quantity.

For self-attack disorders, trials are exploring boosting T-reg cells so the organism is not being harmed. A similar approach could also be useful in minimizing the chances of organ transplant rejection.

Innovative Experiments

Professor Shimon Sakaguchi, of a Japanese institution, conducted experiments on mice that had their thymus extracted, leading to self-attack conditions.

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

Mary Brunkow, affiliated with the a research center in Seattle, and Dr. Ramsdell, now at a biotech firm in a California city, were studying an genetic autoimmune disease in mice and people that led to the identification of a genetic factor critical for how regulatory T-cells operate.

"Their pioneering research has revealed how the body's defenses is kept in check by regulatory T cells, stopping it from mistakenly attacking the body's own tissues," commented a leading biological science expert.

"This research is a remarkable example of how basic biological research can have far-reaching consequences for public health."