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This year's prestigious award in medical science has been awarded for revolutionary discoveries that illuminate how the body's defense network targets harmful infections while protecting the body's own cells.

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

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

The findings are now paving the way for innovative treatments for immune disorders and cancer.

These laureates will divide a monetary award worth 11 million Swedish kronor.

Crucial Findings

"The work has been decisive for comprehending how the body's defenses operates and the reason we don't all develop serious autoimmune diseases," stated the chair of the award panel.

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

Our immune system uses immune cells that scan for indicators of disease, including pathogens and germs it has never encountered.

Such cells utilize sensors—known as recognition units—that are generated by chance in countless variations.

This provides the immune system the capacity to fight a broad range of invaders, but the randomness of the process inevitably produces immune cells that can attack the body.

Protectors of the Body

Scientists previously knew that a portion of these problematic defense cells were destroyed in the thymus—where immune cells mature.

This year's award honors the discovery of T-reg cells—known as the immune system's "security guards"—which travel through the system to neutralize other defenders that assault the body's own tissues.

We know that this mechanism fails in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

The Nobel panel added, "These discoveries have established a novel area of research and spurred the development of innovative treatments, for instance for tumors and autoimmune diseases."

Regarding cancer, regulatory T-cells prevent the system from attacking the growth, so studies are aimed at reducing their numbers.

In autoimmune diseases, experiments are testing boosting regulatory T-cells so the body is no longer being harmed. A similar approach could also be useful in reducing the risks of transplanted organ failure.

Innovative Experiments

Professor Sakaguchi, from a Japanese institution, performed experiments on rodents that had their thymus removed, leading to autoimmune disease.

He demonstrated that introducing defense cells from healthy animals could prevent the illness—implying there was a mechanism for blocking immune cells from harming the host.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in a California city, were investigating an genetic immune disorder in mice and humans that led to the discovery of a gene vital for the way regulatory T-cells operate.

"Their pioneering research has revealed how the body's defenses is controlled by T-reg cells, stopping it from accidentally attacking the body's own tissues," said a leading biological science specialist.

"This work is a striking example of how basic physiological study can have broad implications for human health."