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This year's prestigious award in medical science was awarded for transformative discoveries that illuminate how the immune system attacks harmful infections while protecting the body's own cells.

Three renowned researchers—from Japan Shimon Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—received this honor.

Their work identified unique "security guards" within the defense system that remove malfunctioning immune cells that could harming the organism.

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

The winners will share a monetary award valued at 11m Swedish kronor.

Crucial Findings

"Their work has been decisive for comprehending how the immune system operates and the reason we don't all develop serious self-attack conditions," stated the head of the Nobel Committee.

The team's research explain a fundamental question: How does the defense system protect us from countless invaders while keeping our own tissues intact?

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

These defenders employ detectors—known as receptors—that are produced by chance in a vast number of combinations.

This gives the immune system the ability to fight a broad range of invaders, but the randomness of the mechanism inevitably produces immune cells that can attack the body.

Security Guards of the Body

Researchers previously understood that some of these harmful defense cells were destroyed in the thymus—the site where immune cells mature.

The latest award honors the identification of T-reg cells—known as the immune system's "peacekeepers"—which patrol the system to neutralize other immune cells 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 findings have laid the foundation for a novel area of research and spurred the creation of innovative treatments, for example for cancer and autoimmune diseases."

In cancer, regulatory T-cells block the system from fighting the growth, so research are focused on reducing their quantity.

In autoimmune diseases, trials are testing increasing regulatory T-cells so the organism is not under attack. A comparable approach could also be useful in reducing the chances of organ transplant failure.

Innovative Experiments

Professor Shimon Sakaguchi, of a Japanese institution, performed tests on mice that had their immune gland removed, causing self-attack conditions.

The researcher showed that injecting defense cells from healthy mice could prevent the disease—implying there was a mechanism for preventing defenders from harming the host.

Dr. Brunkow, affiliated with the a research center in Seattle, and Dr. Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were investigating an inherited immune disorder in mice and people that resulted in the discovery of a gene critical for how T-regs function.

"The groundbreaking research has revealed how the immune system is controlled by T-reg cells, preventing it from accidentally targeting the body's own tissues," commented a prominent biological science specialist.

"The research is a remarkable example of how fundamental physiological study can have broad implications for public health."