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The prestigious award in Physiology or Medicine has been granted for revolutionary findings that illuminate how the immune system targets dangerous pathogens while protecting the healthy tissues.

Three renowned scientists—Japan's Prof. Sakaguchi and American experts Dr. Brunkow and Fred Ramsdell—received this accolade.

Their research uncovered unique "security guards" within the immune system that remove malfunctioning immune cells that could attacking the body.

These findings are now enabling new treatments for immune disorders and cancer.

These laureates will share a prize fund valued at 11m SEK.

Crucial Findings

"The research has been decisive for comprehending how the immune system functions and why we do not all suffer from severe self-attack conditions," commented the head of the award panel.

The trio's research explain a fundamental question: How does the immune system defend us from numerous invaders while leaving our own tissues unharmed?

Our immune system uses immune cells that search for signs of disease, even viruses and germs it has never encountered.

These cells utilize detectors—called receptors—that are produced by chance in a vast number of variations.

That gives the immune system the capacity to combat a wide array of invaders, but the randomness of the mechanism unavoidably creates immune cells that may target the body.

Security Guards of the Immune System

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

The latest Nobel Prize recognizes the discovery of T-reg cells—known as the immune system's "security guards"—which travel through the body to disarm other immune cells that assault the healthy cells.

We know that this process malfunctions in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and RA.

A Nobel panel stated, "The discoveries have laid the foundation for a novel area of research and spurred the development of innovative therapies, for instance for tumors and autoimmune diseases."

Regarding cancer, regulatory T-cells prevent the system from fighting the growth, so research are aimed at lowering their quantity.

For self-attack disorders, trials are testing boosting T-reg cells so the body is not being harmed. A similar approach could also be useful in reducing the chances of organ transplant rejection.

Pioneering Experiments

Prof Sakaguchi, from Osaka University, performed experiments on mice that had their immune gland removed, causing autoimmune disease.

He showed that injecting immune cells from other mice could stop the illness—implying there was a system for blocking defenders from harming the host.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were investigating an inherited immune disorder in rodents and people that resulted in the identification of a genetic factor vital for how regulatory T-cells function.

"Their groundbreaking work has revealed how the immune system is kept in check by T-reg cells, stopping it from accidentally attacking the healthy cells," commented a leading biological science expert.

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