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The prestigious award in Physiology or Medicine has been awarded for transformative discoveries that illuminate how the immune system attacks dangerous infections while protecting the body's own cells.

Three renowned scientists—from Japan Shimon Sakaguchi and US scientists Dr. Brunkow and Fred Ramsdell—received this honor.

The research uncovered unique "security guards" within the defense system that remove malfunctioning immune cells capable of attacking the body.

These findings are now paving the way for innovative therapies for autoimmune diseases and malignancies.

The laureates will share a prize fund worth 11 million Swedish kronor.

Crucial Findings

"Their research has been decisive for comprehending how the immune system functions and the reason we do not all suffer from serious autoimmune diseases," stated the chair of the Nobel Committee.

This trio's studies explain a core mystery: How does the defense system defend us from numerous invaders while keeping our healthy cells intact?

The immune system employs immune cells that scan for indicators of disease, including pathogens and germs it has not met before.

Such cells utilize sensors—called receptors—that are produced by chance in a vast number of combinations.

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

Protectors of the Immune System

Researchers previously knew that a portion of these problematic defense cells were eliminated in the immune organ—the site where white blood cells mature.

This year's Nobel Prize honors the identification of T-reg cells—known as the immune system's "peacekeepers"—which travel through the body to neutralize any defenders that attack the healthy cells.

It is known that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

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

Regarding malignancies, T-regs prevent the body from attacking the tumor, so research are aimed at lowering their quantity.

In autoimmune diseases, trials are testing boosting regulatory T-cells so the body is not being harmed. A similar approach could also be effective in minimizing the chances of organ transplant failure.

Innovative Experiments

Prof Sakaguchi, of a Japanese institution, performed tests on mice that had their immune gland extracted, leading to self-attack conditions.

He showed that injecting defense cells from other animals could prevent the illness—implying there was a mechanism for blocking immune cells from attacking the body.

Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited immune disorder in mice and humans that led to the identification of a genetic factor vital for the way regulatory T-cells function.

"Their pioneering work has revealed how the body's defenses is controlled by T-reg cells, stopping it from accidentally attacking the healthy cells," said a prominent physiology expert.

"This work is a striking example of how fundamental physiological study can have far-reaching implications for human health."