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This year's Nobel Prize in medical science has been awarded for revolutionary findings that clarify how the immune system attacks harmful pathogens while protecting the healthy tissues.

Three renowned scientists—from Japan Prof. Sakaguchi and American scientists Dr. Brunkow and Dr. Ramsdell—share this accolade.

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

The discoveries are now paving the way for new therapies for immune disorders and malignancies.

These laureates will share a prize fund worth 11 million SEK.

Crucial Discoveries

"The research has been decisive for comprehending how the body's defenses functions and why we do not all develop severe autoimmune diseases," stated the chair of the Nobel Committee.

The trio's studies explain a fundamental question: How does the immune system defend us from countless infections while keeping our healthy cells intact?

The body's protection system employs white blood cells that search for indicators of infection, including pathogens and bacteria it has never encountered.

These cells utilize detectors—known as recognition units—that are produced randomly in countless variations.

This gives the immune system the ability to fight a wide array of invaders, but the randomness of the mechanism unavoidably produces immune cells that can attack the host.

Security Guards of the Body

Scientists previously understood that some of these problematic white blood cells were destroyed in the immune organ—the site where white blood cells develop.

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

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

The Nobel panel stated, "These findings have laid the foundation for a new field of research and spurred the creation of innovative treatments, for example for tumors and immune disorders."

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

In autoimmune diseases, experiments are exploring boosting regulatory T-cells so the body is no longer under attack. A comparable approach could also be effective in minimizing the risks of transplanted organ rejection.

Pioneering Studies

Prof Shimon Sakaguchi, of Osaka University, performed tests on rodents that had their immune gland removed, leading to self-attack conditions.

He demonstrated that injecting defense cells from other animals could stop the illness—implying there was a system for preventing immune cells from attacking the host.

Mary Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited immune disorder in mice and humans that led to the discovery of a gene vital for how regulatory T-cells operate.

"The pioneering research has revealed how the body's defenses is controlled by T-reg cells, preventing it from mistakenly targeting the body's own tissues," commented a leading physiology specialist.

"The research is a remarkable example of how basic biological research can have far-reaching implications for public health."