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This year's prestigious award in medical science has been granted for transformative findings that illuminate how the immune system targets harmful infections while sparing the healthy tissues.

A trio of esteemed scientists—from Japan Prof. Sakaguchi and US experts Dr. Brunkow and Dr. Ramsdell—received this honor.

Their work identified unique "sentinels" within the immune system that eliminate malfunctioning immune cells capable of attacking the body.

These findings are now paving the way for new therapies for autoimmune diseases and cancer.

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

Decisive Discoveries

"The work has been essential for comprehending how the immune system operates and the reason we don't all develop serious self-attack conditions," stated the head of the award panel.

The trio's research address a fundamental question: In what way does the defense system protect us from numerous infections while leaving our healthy cells intact?

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

Such defenders employ detectors—called receptors—that are produced randomly in a vast number of combinations.

This gives the defense network the capacity to fight a wide array of invaders, but the randomness of the mechanism inevitably produces immune cells that may attack the body.

Security Guards of the Body

Researchers earlier understood that a portion of these harmful white blood cells were destroyed in the immune organ—where white blood cells mature.

The latest award honors the discovery of T-reg cells—described as the immune system's "peacekeepers"—which patrol the body to disarm any defenders that assault the healthy cells.

It is known that this mechanism fails in self-attack conditions such as juvenile diabetes, multiple sclerosis, and RA.

The prize committee added, "The discoveries have established a new field of investigation and spurred the development of new therapies, for example for cancer and autoimmune diseases."

Regarding malignancies, T-regs prevent the system from attacking the tumor, so research are focused on reducing their quantity.

For self-attack disorders, trials are exploring increasing regulatory T-cells so the organism is not under attack. A comparable approach could also be useful in reducing the chances of organ transplant rejection.

Pioneering Experiments

Prof Shimon Sakaguchi, of Osaka University, performed experiments on rodents that had their immune gland removed, causing autoimmune disease.

The researcher demonstrated that injecting immune cells from healthy animals could prevent the illness—suggesting there was a system for blocking immune cells from attacking the host.

Mary Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in a California city, were studying an genetic autoimmune disease in rodents and people that resulted in the discovery of a gene critical for how T-regs operate.

"The groundbreaking research has uncovered how the immune system is kept in check by regulatory T cells, preventing it from accidentally attacking the healthy cells," commented a leading physiology specialist.

"This research is a remarkable illustration of how basic physiological research can have broad implications for human health."