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This year's Nobel Prize in Physiology or Medicine has been awarded for revolutionary findings that illuminate how the immune system targets dangerous infections while sparing the body's own cells.

A trio of esteemed researchers—from Japan Shimon Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—received this accolade.

Their research uncovered specialized "sentinels" within the defense system that eliminate rogue immune cells that could harming the body.

The discoveries are now enabling innovative therapies for immune disorders and malignancies.

The winners will divide a monetary award worth 11 million Swedish kronor.

Crucial Findings

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

This trio's studies explain a fundamental question: In what way does the defense system defend us from numerous infections while keeping our healthy cells intact?

The immune system uses immune cells that scan for signs of infection, even viruses and germs it has not met before.

Such cells employ detectors—called receptors—that are generated by chance in countless combinations.

That provides the defense network the capacity to combat a wide array of threats, but the unpredictability of the process inevitably produces white blood cells that can target the body.

Protectors of the Body

Scientists earlier understood that some of these harmful white blood cells were destroyed in the immune organ—where immune cells develop.

This year's Nobel Prize recognizes the discovery of T-reg cells—known as the immune system's "peacekeepers"—which travel through the system to neutralize other immune cells that attack the healthy cells.

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

The Nobel panel added, "These discoveries have established a novel area of research and accelerated the development of new therapies, for example for tumors and immune disorders."

In cancer, T-regs block the body from fighting the tumor, so research are aimed at lowering their quantity.

In autoimmune diseases, experiments are testing boosting T-reg cells so the body is no longer being harmed. A comparable method could also be effective in minimizing the chances of transplanted organ failure.

Pioneering Experiments

Professor Shimon Sakaguchi, of a Japanese institution, conducted experiments on rodents that had their immune gland removed, causing self-attack conditions.

He showed that injecting immune cells from healthy mice could stop the disease—suggesting there was a mechanism for preventing defenders from attacking the host.

Dr. Brunkow, from the Institute for Systems Biology in a US city, and Dr. Ramsdell, currently at a biotech firm in a California city, were studying an genetic immune disorder in rodents and people that resulted in the identification of a genetic factor vital for how T-regs operate.

"The groundbreaking research has revealed how the body's defenses is controlled by T-reg cells, stopping it from mistakenly targeting the healthy cells," said a leading physiology expert.

"The research is a striking example of how fundamental biological research can have far-reaching consequences for human health."