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This year's prestigious award in medical science has been granted for transformative discoveries that clarify how the immune system attacks harmful pathogens while protecting the healthy tissues.

Three esteemed scientists—from Japan Shimon Sakaguchi and US experts Mary Brunkow and Dr. Ramsdell—share this accolade.

Their research uncovered specialized "security guards" within the immune system that remove malfunctioning immune cells capable of harming the organism.

The findings are now enabling innovative therapies for autoimmune diseases and malignancies.

The laureates will divide a prize fund worth 11m Swedish kronor.

Decisive Discoveries

"Their work has been decisive for comprehending how the body's defenses functions and why we don't all suffer from severe self-attack conditions," stated the head of the Nobel Committee.

The trio's studies address a core question: In what way does the defense system defend 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 defenders employ sensors—known as receptors—that are produced by chance in countless combinations.

This provides the defense network the capacity to fight a wide array of invaders, but the randomness of the mechanism unavoidably creates white blood cells that can attack the host.

Protectors of the Body

Researchers previously understood that some of these harmful defense cells were destroyed in the thymus—where immune cells develop.

The latest award recognizes the identification of regulatory T-cells—known as the immune system's "security guards"—which travel through the body to neutralize any defenders that assault the healthy cells.

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

The Nobel panel added, "The findings have established a new field of research and spurred the creation of innovative treatments, for instance for cancer and autoimmune diseases."

In malignancies, regulatory T-cells block the system from fighting the growth, so studies are aimed at reducing their quantity.

In autoimmune diseases, experiments are testing increasing regulatory T-cells so the body is not being harmed. A comparable method could also be effective in reducing the chances of organ transplant rejection.

Innovative Experiments

Prof Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus removed, causing self-attack conditions.

The researcher demonstrated that injecting immune cells from healthy mice could prevent the disease—suggesting there was a system for blocking defenders from harming the host.

Dr. Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an inherited immune disorder in rodents and people that led to the identification of a genetic factor vital for how regulatory T-cells function.

"Their pioneering research has revealed how the immune system is kept in check by T-reg cells, stopping it from mistakenly targeting the healthy cells," said a prominent biological science specialist.

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