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The prestigious award in medical science has been granted for revolutionary discoveries that clarify how the immune system attacks harmful infections while sparing the healthy tissues.

A trio of esteemed scientists—Japan's Prof. Sakaguchi and US experts Dr. Brunkow and Fred Ramsdell—share this accolade.

The work uncovered specialized "security guards" within the defense system that eliminate rogue defense cells that could attacking the body.

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

These laureates will divide a monetary award valued at 11m Swedish kronor.

Crucial Discoveries

"The work has been essential for comprehending how the immune system operates and why we do not all develop serious autoimmune diseases," stated the head of the Nobel Committee.

The team's research address a core question: In what way does the immune system defend us from countless infections while leaving our own tissues intact?

The immune system employs white blood cells that scan for signs of disease, including pathogens and germs it has never encountered.

Such cells utilize detectors—known as receptors—that are produced by chance in countless combinations.

This provides the immune system the capacity to fight a wide array of threats, but the randomness of the process unavoidably creates immune cells that can attack the body.

Protectors of the Body

Scientists previously understood that a portion of these problematic defense cells were eliminated in the thymus—where white blood cells develop.

This year's Nobel Prize recognizes the identification of regulatory T-cells—described as the immune system's "security guards"—which travel through the system to neutralize other defenders that assault the healthy cells.

It is known that this process fails in self-attack conditions such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

A Nobel panel stated, "The findings have laid the foundation for a novel area of research and spurred the development of new therapies, for instance for tumors and immune disorders."

Regarding cancer, T-regs block the system from attacking the growth, so studies are aimed at reducing their quantity.

For autoimmune diseases, trials are exploring boosting regulatory T-cells so the body is not being harmed. A similar method could also be effective in minimizing the chances of transplanted organ failure.

Innovative Studies

Prof Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus extracted, leading to autoimmune disease.

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

Mary Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, now at a biotech firm in San Francisco, were investigating an genetic immune disorder in mice and people that resulted in the identification of a gene critical for the way T-regs function.

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

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