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The prestigious award in medical science has been awarded for revolutionary findings that clarify how the immune system targets dangerous pathogens while sparing the healthy tissues.

A trio of esteemed researchers—Japan's Prof. Sakaguchi and US experts Mary Brunkow and Fred Ramsdell—received this accolade.

Their research identified unique "sentinels" within the defense system that remove rogue immune cells capable of harming the organism.

These findings are now enabling new therapies for immune disorders and malignancies.

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

Crucial Findings

"Their research has been decisive for understanding how the body's defenses operates and why we do not all develop severe autoimmune diseases," commented the chair of the award panel.

The trio's research explain a core question: In what way does the defense system defend us from countless invaders while keeping our own tissues intact?

The immune system employs white blood cells that search for indicators of disease, including viruses and germs it has not met before.

Such cells utilize detectors—called receptors—that are produced by chance in countless combinations.

This gives the immune system the ability to combat a broad range of invaders, but the randomness of the process inevitably produces immune cells that may target the host.

Security Guards of the Body

Researchers previously knew that a portion of these harmful defense cells were destroyed in the immune organ—the site where white blood cells mature.

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

It is known that this process malfunctions in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and RA.

A prize committee stated, "The findings have laid the foundation for a novel area of investigation and spurred the creation of new therapies, for instance for cancer and autoimmune diseases."

In cancer, regulatory T-cells prevent the system from fighting the growth, so studies are aimed at lowering their numbers.

In autoimmune diseases, trials are exploring boosting regulatory T-cells so the body is no longer being harmed. A comparable approach could also be effective in reducing the chances of organ transplant failure.

Innovative Studies

Prof Shimon Sakaguchi, of Osaka University, performed experiments on rodents that had their thymus removed, leading to self-attack conditions.

He showed that introducing defense cells from healthy animals could stop the disease—suggesting there was a mechanism for blocking immune cells from attacking the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at a biotech firm in a California city, were studying an inherited immune disorder in rodents and people that led to the discovery of a gene critical for how regulatory T-cells operate.

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

"The research is a remarkable illustration of how basic biological research can have broad consequences for public health."