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This year's prestigious award in medical science has been granted for revolutionary findings that illuminate how the body's defense network attacks harmful pathogens while sparing the body's own cells.

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

The research uncovered specialized "security guards" within the defense system that eliminate malfunctioning defense cells that could harming the organism.

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

The laureates will share a prize fund worth 11m SEK.

Crucial Findings

"The work has been essential for understanding how the body's defenses functions and why we don't all suffer from serious autoimmune diseases," stated the chair of the Nobel Committee.

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

The body's protection system employs immune cells that scan for signs of infection, even pathogens and bacteria it has not met before.

Such defenders employ detectors—called receptors—that are produced by chance in countless combinations.

This provides the immune system the capacity to combat a wide array of invaders, but the randomness of the mechanism inevitably produces white blood cells that can target the host.

Protectors of the Body

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

This year's award honors the discovery of T-reg cells—known as the body's "peacekeepers"—which travel through the body 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, multiple sclerosis, and RA.

The Nobel panel added, "The discoveries have laid the foundation for a new field of research and accelerated the development of innovative therapies, for example for tumors and autoimmune diseases."

In malignancies, regulatory T-cells block the body from attacking the tumor, so research are aimed at lowering their numbers.

For self-attack disorders, trials are exploring increasing T-reg cells so the organism is no longer being harmed. A similar method could also be effective in minimizing the risks of transplanted organ failure.

Pioneering Studies

Prof Sakaguchi, from Osaka University, conducted tests on rodents that had their thymus removed, leading to self-attack conditions.

He showed that introducing immune cells from healthy mice could stop the disease—implying there was a mechanism for blocking immune cells from harming the host.

Mary Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were investigating an genetic immune disorder in rodents and humans that resulted in the discovery of a gene vital for how T-regs operate.

"Their groundbreaking research has revealed how the immune system is controlled by T-reg cells, stopping it from mistakenly attacking the healthy cells," commented a prominent biological science specialist.

"The research is a striking example of how fundamental physiological study can have far-reaching consequences for human health."