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This year's Nobel Prize in medical science was granted for revolutionary discoveries that clarify how the immune system attacks harmful pathogens while sparing the body's own cells.

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

The work uncovered unique "security guards" within the defense system that remove rogue immune cells that could attacking the organism.

These discoveries are now enabling new treatments for immune disorders and malignancies.

The winners will share a monetary award valued at 11 million SEK.

Crucial Findings

"Their research has been decisive for understanding how the body's defenses functions and the reason we don't all develop severe autoimmune diseases," stated the chair of the Nobel Committee.

This trio's research explain a core mystery: In what way does the defense system defend us from countless invaders while keeping our healthy cells unharmed?

The immune system employs immune cells that search for signs of disease, including pathogens and bacteria it has not met before.

These cells utilize detectors—known as recognition units—that are produced by chance in countless combinations.

This provides the defense network the ability to fight a broad range of invaders, but the unpredictability of the mechanism inevitably creates white blood cells that can attack the body.

Protectors of the Body

Researchers earlier knew that a portion of these problematic white blood cells were eliminated in the thymus—the site where immune cells develop.

This year's Nobel Prize recognizes the identification of T-reg cells—known as the immune system's "peacekeepers"—which patrol the system to disarm other immune cells that assault the body's own tissues.

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

A Nobel panel stated, "These findings have laid the foundation for a novel area of research and accelerated the development of innovative treatments, for instance for cancer and autoimmune diseases."

Regarding cancer, T-regs prevent the body from attacking the tumor, so research are aimed at lowering their quantity.

For autoimmune diseases, trials are exploring boosting T-reg cells so the body is no longer under attack. A comparable method could also be effective in reducing the chances of transplanted organ failure.

Pioneering Studies

Prof Sakaguchi, from a Japanese institution, conducted experiments on rodents that had their thymus extracted, leading to self-attack conditions.

The researcher showed that introducing immune cells from healthy mice could stop the disease—implying there was a system for preventing immune cells 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 San Francisco, were studying an genetic immune disorder in rodents and people that led to the discovery of a gene critical for the way T-regs function.

"Their groundbreaking research has revealed how the immune system is controlled by regulatory T cells, stopping it from mistakenly attacking the healthy cells," said a prominent physiology expert.

"The research is a striking illustration of how fundamental physiological research can have broad consequences for human health."