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This year's prestigious award in medical science was awarded for revolutionary findings that illuminate how the body's defense network targets harmful infections while protecting the body's own cells.

Three esteemed researchers—Japan's Prof. Sakaguchi and US experts Dr. Brunkow and Fred Ramsdell—share this accolade.

Their work identified unique "security guards" within the defense system that remove malfunctioning immune cells capable of attacking the organism.

These findings are now enabling innovative treatments for autoimmune diseases and cancer.

These laureates will divide a prize fund valued at 11 million Swedish kronor.

Crucial Discoveries

"The work has been essential for understanding how the body's defenses operates and the reason we don't all develop severe self-attack conditions," commented the head of the award panel.

This team's studies address a core mystery: In what way does the defense system protect us from numerous invaders while keeping our healthy cells unharmed?

Our immune system employs white blood cells that scan for indicators of infection, even pathogens and bacteria it has not met before.

Such cells employ detectors—known as receptors—that are produced randomly in a vast number of variations.

That gives the defense network the capacity to combat a broad range of invaders, but the randomness of the process unavoidably creates white blood cells that may target the host.

Security Guards of the Body

Scientists previously knew that a portion of these harmful white blood cells were destroyed in the thymus—where white blood cells develop.

This year's award recognizes the discovery of T-reg cells—described as the immune system's "peacekeepers"—which travel through the system to neutralize any immune cells that attack the healthy cells.

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

The prize committee stated, "The discoveries have established a new field of investigation and spurred the development of new treatments, for example for cancer and immune disorders."

Regarding cancer, T-regs prevent the system from fighting the tumor, so research are focused on lowering their quantity.

In self-attack disorders, trials are exploring increasing T-reg cells so the body is no longer under attack. A comparable method could also be effective in reducing the risks of transplanted organ failure.

Pioneering Studies

Professor Sakaguchi, from Osaka University, conducted tests on rodents that had their immune gland extracted, leading to autoimmune disease.

The researcher showed that introducing defense cells from healthy animals could prevent the illness—implying there was a system for blocking immune cells from attacking the host.

Mary Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an genetic immune disorder in rodents and humans that resulted in the discovery of a genetic factor vital for how T-regs function.

"The pioneering work has revealed how the immune system is kept in check by T-reg cells, preventing it from mistakenly targeting the healthy cells," commented a prominent biological science specialist.

"The work is a remarkable example of how fundamental physiological research can have broad consequences for human health."