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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 pathogens while sparing the healthy tissues.

A trio of esteemed researchers—from Japan Prof. Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—received this honor.

Their work uncovered unique "sentinels" within the defense system that eliminate malfunctioning defense cells capable of attacking the body.

The discoveries are now enabling innovative treatments for immune disorders and cancer.

These winners will share a prize fund valued at 11m Swedish kronor.

Decisive Discoveries

"The research has been decisive for understanding how the body's defenses functions and the reason we don't all develop severe autoimmune diseases," stated the head of the Nobel Committee.

This team's research address a fundamental question: In what way does the immune system defend us from countless infections while keeping our own tissues unharmed?

Our immune system uses white blood cells that scan for indicators of disease, including pathogens and germs it has not met before.

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

This gives the defense network the capacity to combat a wide array of threats, but the unpredictability of the mechanism inevitably creates white blood cells that may attack the host.

Security Guards of the Immune System

Researchers earlier knew that some of these harmful defense cells were eliminated in the immune organ—the site where white blood cells mature.

The latest award honors the identification of regulatory T-cells—known as the immune system's "peacekeepers"—which patrol the body to disarm any immune cells that attack the healthy cells.

We know that this process fails in autoimmune diseases such as type-1 diabetes, MS, and RA.

A Nobel panel added, "The discoveries have laid the foundation for a new field of research and spurred the creation of new treatments, for example for tumors and autoimmune diseases."

Regarding cancer, regulatory T-cells prevent the system from fighting the tumor, so research are focused on lowering their quantity.

For autoimmune diseases, trials are exploring boosting T-reg cells so the organism is not being harmed. A comparable method could also be useful in minimizing the chances of organ transplant failure.

Innovative Studies

Professor Sakaguchi, from a Japanese institution, conducted tests on rodents that had their immune gland extracted, causing self-attack conditions.

The researcher showed that injecting immune cells from healthy animals could stop the disease—implying there was a system for preventing defenders from harming the body.

Mary Brunkow, affiliated with the a research center in Seattle, and Dr. Ramsdell, now at Sonoma Biotherapeutics in a California city, were studying an inherited immune disorder in mice and people that led to the identification of a gene vital for the way T-regs operate.

"Their groundbreaking work has revealed how the body's defenses is kept in check by regulatory T cells, preventing it from accidentally targeting the body's own tissues," said a prominent biological science expert.

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