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The Nobel Prize in medical science has been awarded for revolutionary findings that illuminate how the immune system targets harmful infections while protecting the body's own cells.

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

Their work identified unique "security guards" within the immune system that eliminate rogue immune cells capable of harming the organism.

The findings are now enabling new treatments for immune disorders and malignancies.

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

Decisive Findings

"Their research has been decisive for understanding how the body's defenses operates and the reason we do not all suffer from serious self-attack conditions," stated the head of the award panel.

The trio's research address a fundamental question: How does the defense system protect us from countless infections while leaving our own tissues unharmed?

Our body's protection system uses immune cells that search for indicators of infection, even pathogens and bacteria it has not met before.

These cells employ detectors—known as receptors—that are generated by chance in countless combinations.

That gives the immune system the ability to fight a wide array of threats, but the randomness of the process inevitably creates white blood cells that can target the host.

Protectors of the Immune System

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

This year's Nobel Prize recognizes the identification of T-reg cells—described as the immune system's "peacekeepers"—which travel through the system to disarm any defenders that assault the healthy cells.

It is known that this process malfunctions in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

The prize committee added, "The discoveries have established a novel area of investigation and accelerated the creation of new treatments, for instance for cancer and autoimmune diseases."

Regarding malignancies, regulatory T-cells block the system from fighting the growth, so research are focused on lowering their numbers.

For self-attack disorders, experiments are exploring increasing regulatory T-cells so the organism is no longer being harmed. A comparable method could also be effective in minimizing the risks of transplanted organ rejection.

Innovative Experiments

Professor Sakaguchi, of a Japanese institution, conducted tests on mice that had their immune gland removed, leading to self-attack conditions.

He demonstrated that introducing immune cells from healthy mice could prevent the disease—suggesting there was a system for blocking defenders from harming the host.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited immune disorder in mice and humans that led to the identification of a gene vital for the way regulatory T-cells operate.

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

"This research is a remarkable example of how fundamental biological study can have far-reaching consequences for public health."