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This year's Nobel Prize in medical science has been granted for revolutionary findings that clarify how the body's defense network targets harmful pathogens while protecting the healthy tissues.

Three renowned researchers—Japan's Shimon Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—received this honor.

Their work identified unique "sentinels" within the immune system that remove malfunctioning immune cells that could harming the organism.

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

The winners will divide a monetary award worth 11 million Swedish kronor.

Decisive Findings

"The research has been essential for understanding how the body's defenses operates and why we don't all develop severe autoimmune diseases," commented the chair of the Nobel Committee.

The team's studies address a core mystery: How does the defense system defend us from numerous invaders while keeping our own tissues intact?

The body's protection system employs immune cells that search for indicators of infection, including viruses and bacteria it has not met before.

Such cells utilize detectors—called receptors—that are generated randomly in a vast number of combinations.

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

Protectors of the Immune System

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

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

It is known that this process fails in autoimmune diseases such as type-1 diabetes, MS, and RA.

The Nobel panel stated, "The findings have established a new field of investigation and accelerated the creation of new therapies, for instance for tumors and autoimmune diseases."

Regarding malignancies, regulatory T-cells prevent the system from fighting the tumor, so studies are aimed at reducing their quantity.

For self-attack disorders, experiments are testing boosting T-reg cells so the body is no longer under attack. A comparable method could also be effective in minimizing the risks of transplanted organ failure.

Pioneering Studies

Prof Sakaguchi, of Osaka University, conducted tests on rodents that had their immune gland extracted, causing self-attack conditions.

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

Dr. Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were investigating an genetic autoimmune disease in rodents and people that resulted in the discovery of a genetic factor vital for the way T-regs function.

"The pioneering work has uncovered how the body's defenses is kept in check by T-reg cells, preventing it from mistakenly targeting the healthy cells," said a leading physiology expert.

"The research is a striking illustration of how fundamental biological research can have far-reaching implications for public health."