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

Three esteemed scientists—Japan's Prof. Sakaguchi and American scientists Mary Brunkow and Fred Ramsdell—received this honor.

Their research identified unique "sentinels" within the immune system that remove malfunctioning immune cells capable of attacking the body.

The discoveries are now paving the way for innovative treatments for autoimmune diseases and cancer.

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

Decisive Findings

"The work has been essential for comprehending how the immune system operates and why we don't all suffer from serious self-attack conditions," commented the head of the Nobel Committee.

This trio's studies address a core mystery: In what way does the immune system protect us from numerous invaders while keeping our healthy cells unharmed?

Our body's protection system uses white blood cells that scan for signs of infection, even viruses and germs it has not met before.

Such cells employ sensors—known as recognition units—that are generated randomly in a vast number of combinations.

This provides the defense network the ability to fight a wide array of threats, but the unpredictability of the mechanism inevitably produces immune cells that can target the host.

Protectors of the Immune System

Researchers earlier understood that a portion of these problematic white blood cells were eliminated in the immune organ—the site where white blood cells mature.

This year's Nobel Prize honors the discovery of T-reg cells—described as the body's "peacekeepers"—which patrol the body to disarm other defenders that attack the body's own tissues.

We know that this process fails in self-attack conditions such as juvenile diabetes, MS, and RA.

A Nobel panel stated, "These findings have established a new field of investigation and accelerated the creation of new therapies, for example for cancer and immune disorders."

Regarding cancer, T-regs block the body from attacking the tumor, so research are focused on lowering their quantity.

For self-attack disorders, experiments are testing increasing T-reg cells so the organism is no longer under attack. A similar method could also be effective in minimizing the risks of transplanted organ rejection.

Innovative Experiments

Professor Sakaguchi, from Osaka University, performed experiments on mice that had their immune gland removed, leading to autoimmune disease.

He demonstrated that injecting defense cells from other animals could stop the illness—implying there was a system for blocking immune cells from attacking the body.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were investigating an inherited autoimmune disease in rodents and humans that resulted in the identification of a gene vital for the way regulatory T-cells operate.

"The pioneering work has uncovered how the body's defenses is controlled by regulatory T cells, stopping it from mistakenly targeting the body's own tissues," said a leading physiology expert.

"This work is a remarkable example of how basic physiological study can have broad consequences for public health."