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The prestigious award in medical science was granted for revolutionary discoveries that illuminate how the body's defense network attacks harmful pathogens while protecting the healthy tissues.

Three renowned researchers—Japan's Prof. Sakaguchi and American scientists Dr. Brunkow and Dr. Ramsdell—received this accolade.

The research uncovered specialized "security guards" within the defense system that eliminate malfunctioning defense cells capable of attacking the organism.

These discoveries are now paving the way for innovative treatments for immune disorders and malignancies.

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

Decisive Findings

"Their research has been essential for comprehending how the immune system functions and why we do not all develop serious autoimmune diseases," commented the chair of the Nobel Committee.

This team's research explain a fundamental mystery: In what way does the defense system protect us from countless invaders while leaving our healthy cells unharmed?

Our body's protection system uses white blood cells that search for signs of infection, even pathogens and bacteria it has never encountered.

These defenders employ detectors—called receptors—that are produced by chance in countless variations.

This gives the defense network the ability to combat a wide array of invaders, but the unpredictability of the process unavoidably produces white blood cells that may attack the body.

Security Guards of the Immune System

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

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

It is known that this process fails in self-attack conditions such as type-1 diabetes, MS, and RA.

A Nobel panel added, "The findings have established a new field of investigation and spurred the development of innovative treatments, for example for tumors and immune disorders."

Regarding malignancies, regulatory T-cells block the body from attacking the tumor, so studies are aimed at reducing their numbers.

In autoimmune diseases, trials are testing increasing T-reg cells so the organism is no longer being harmed. A similar approach could also be effective in reducing the risks of transplanted organ failure.

Pioneering Studies

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

The researcher showed that injecting defense cells from other animals could prevent the disease—suggesting there was a system for blocking immune cells from harming the body.

Mary Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an inherited immune disorder in rodents and humans that resulted in the discovery of a genetic factor critical for how regulatory T-cells operate.

"The groundbreaking work has uncovered how the immune system is controlled by T-reg cells, stopping it from accidentally attacking the body's own tissues," said a leading biological science expert.

"This research is a remarkable illustration of how basic biological study can have broad implications for public health."