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

A trio of renowned researchers—Japan's Prof. Sakaguchi and American experts Mary Brunkow and Dr. Ramsdell—received this accolade.

The work identified unique "sentinels" within the defense system that remove malfunctioning immune cells that could harming the body.

These findings are now paving the way for innovative therapies for immune disorders and cancer.

These winners will divide a prize fund valued at 11 million Swedish kronor.

Decisive Discoveries

"Their research has been decisive for comprehending how the body's defenses functions and the reason we don't all suffer from severe autoimmune diseases," commented the head of the award panel.

This team's research address a fundamental mystery: How does the immune system protect us from numerous infections while keeping our own tissues intact?

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

Such defenders utilize sensors—known as receptors—that are generated by chance in countless variations.

That provides the immune system the capacity to combat a broad range of invaders, but the unpredictability of the mechanism inevitably creates immune cells that can attack the host.

Protectors of the Body

Scientists previously knew that a portion of these problematic defense cells were eliminated in the immune organ—the site where immune cells develop.

The latest award recognizes the identification of regulatory T-cells—described as the immune system's "security guards"—which patrol the system to neutralize other immune cells that assault the healthy cells.

It is known that this mechanism fails in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

The Nobel panel stated, "The findings have laid the foundation for a new field of research and accelerated the development of new treatments, for instance for tumors and autoimmune diseases."

Regarding malignancies, regulatory T-cells block the body from fighting the growth, so research are aimed at reducing their quantity.

For autoimmune diseases, experiments are testing increasing regulatory T-cells so the organism is not under attack. A comparable approach could also be effective in reducing the risks of transplanted organ rejection.

Innovative Experiments

Professor Shimon Sakaguchi, of a Japanese institution, performed tests on mice that had their thymus removed, leading to self-attack conditions.

He demonstrated that injecting immune cells from other animals could prevent the disease—suggesting there was a system for blocking defenders from harming the host.

Dr. Brunkow, from the a research center in a US city, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an genetic immune disorder in mice and humans that led to the identification of a genetic factor vital for how T-regs operate.

"Their groundbreaking work has uncovered how the body's defenses is kept in check by T-reg cells, stopping it from accidentally targeting the body's own tissues," commented a leading physiology expert.

"The work is a remarkable illustration of how fundamental physiological research can have broad implications for public health."