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The Nobel Prize in medical science has been awarded for revolutionary discoveries that clarify how the immune system attacks dangerous infections while protecting the body's own cells.

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

The research identified specialized "security guards" within the immune system that eliminate malfunctioning immune cells that could attacking the organism.

These findings are now enabling innovative therapies for immune disorders and malignancies.

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

Decisive Discoveries

"Their research has been decisive for comprehending how the immune system operates and the reason we do not all develop serious autoimmune diseases," stated the head of the award panel.

The team's research address a fundamental question: How does the defense system protect us from numerous invaders while keeping our healthy cells unharmed?

Our body's protection system uses immune cells that scan for indicators of infection, even viruses and germs it has never encountered.

Such defenders employ sensors—called recognition units—that are generated by chance in countless combinations.

That provides the immune system the capacity to fight a broad range of invaders, but the unpredictability of the process unavoidably creates white blood cells that can target the body.

Security Guards of the Body

Researchers earlier understood that a portion of these problematic defense cells were eliminated in the immune organ—where white blood cells develop.

This year's award recognizes the identification of T-reg cells—known as the body's "security guards"—which patrol the body to neutralize other immune cells that assault the healthy cells.

We know that this process fails in self-attack conditions such as type-1 diabetes, multiple sclerosis, and RA.

A Nobel panel stated, "These discoveries have laid the foundation for a novel area of investigation and accelerated the creation of new treatments, for example for cancer and autoimmune diseases."

In malignancies, regulatory T-cells prevent the body from attacking the tumor, so research are focused on lowering their quantity.

In self-attack disorders, trials are testing boosting T-reg cells so the organism is not being harmed. A similar method could also be effective in minimizing the risks of transplanted organ failure.

Innovative Studies

Professor Shimon Sakaguchi, of Osaka University, performed experiments on rodents that had their thymus extracted, leading to autoimmune disease.

The researcher showed that injecting immune cells from other animals could prevent the illness—suggesting there was a mechanism for preventing defenders from harming the host.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited autoimmune disease in mice and people that led to the discovery of a genetic factor critical for how T-regs operate.

"Their groundbreaking work has uncovered how the immune system is kept in check by regulatory T cells, stopping it from mistakenly targeting the healthy cells," said a leading physiology specialist.

"This research is a striking example of how fundamental physiological study can have broad implications for human health."