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The prestigious award in medical science was granted for transformative discoveries that illuminate how the immune system attacks dangerous pathogens while protecting the healthy tissues.

A trio of esteemed scientists—from Japan Shimon Sakaguchi and US scientists Mary Brunkow and Dr. Ramsdell—received this accolade.

Their research uncovered unique "sentinels" within the defense system that remove malfunctioning immune cells capable of attacking the organism.

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

The laureates will divide a monetary award valued at 11 million Swedish kronor.

Decisive Findings

"The research has been essential for understanding how the immune system operates and the reason we don't all develop severe autoimmune diseases," stated the chair of the Nobel Committee.

This trio's research address a fundamental mystery: In what way does the defense system protect us from countless invaders while leaving our healthy cells intact?

Our immune system employs immune cells that scan for signs of infection, even viruses and bacteria it has not met before.

Such cells utilize sensors—known as receptors—that are generated by chance in a vast number of variations.

This provides the immune system the capacity to fight a broad range of invaders, but the unpredictability of the process unavoidably produces white blood cells that can attack the body.

Protectors of the Immune System

Scientists earlier knew that some of these problematic defense cells were destroyed in the immune organ—where white blood cells mature.

This year's award recognizes the discovery of regulatory T-cells—known as the immune system's "peacekeepers"—which travel through the body to disarm other defenders that assault the body's own tissues.

It is known that this mechanism fails in self-attack conditions such as type-1 diabetes, MS, and RA.

A prize committee added, "The discoveries have established a new field of research and accelerated the development of innovative therapies, for instance for tumors and immune disorders."

Regarding cancer, T-regs block the body from fighting the growth, so studies are focused on lowering their quantity.

In self-attack disorders, experiments are exploring boosting T-reg cells so the body is not under attack. A similar approach could also be effective in reducing the risks of organ transplant failure.

Pioneering Studies

Prof Sakaguchi, from Osaka University, performed tests on mice that had their thymus removed, causing self-attack conditions.

The researcher demonstrated that introducing immune cells from other mice could prevent the disease—suggesting there was a system for preventing immune cells from harming the host.

Mary Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at a biotech firm in San Francisco, were investigating an inherited immune disorder in rodents and people that led to the discovery of a genetic factor vital for the way regulatory T-cells operate.

"Their groundbreaking work has revealed how the body's defenses is controlled by regulatory T cells, preventing it from mistakenly attacking the body's own tissues," commented a prominent biological science specialist.

"This research is a striking example of how basic physiological research can have broad implications for public health."