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The prestigious award in Physiology or Medicine has been awarded for revolutionary findings that clarify how the body's defense network targets dangerous infections while protecting the healthy tissues.

A trio of renowned researchers—from Japan Shimon Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—received this accolade.

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

These discoveries are now enabling new therapies for immune disorders and cancer.

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

Decisive Findings

"Their research has been decisive for comprehending how the body's defenses operates and why we do not all suffer from serious self-attack conditions," commented the chair of the award panel.

This team's research explain a fundamental mystery: How does the immune system defend us from countless infections while keeping our healthy cells intact?

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

These cells utilize sensors—known as receptors—that are generated by chance in countless combinations.

That provides the immune system the capacity to combat a broad range of invaders, but the randomness of the mechanism inevitably produces white blood cells that may attack the body.

Security Guards of the Body

Scientists earlier understood that a portion of these harmful white blood cells were eliminated in the thymus—the site where immune cells mature.

The latest Nobel Prize recognizes the identification of regulatory T-cells—described as the body's "security guards"—which travel through the body to disarm 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 RA.

The prize committee stated, "These discoveries have established a novel area of investigation and accelerated the creation of innovative treatments, for instance for tumors and autoimmune diseases."

In malignancies, T-regs prevent the system from attacking the growth, so research are focused on reducing their numbers.

For autoimmune diseases, trials are exploring increasing regulatory T-cells so the organism is not under attack. A similar approach could also be useful in minimizing the risks of transplanted organ failure.

Innovative Studies

Professor Shimon Sakaguchi, from a Japanese institution, conducted experiments on mice that had their immune gland extracted, leading to autoimmune disease.

The researcher demonstrated that injecting defense cells from healthy mice could prevent the disease—suggesting there was a mechanism for blocking immune cells from attacking the body.

Dr. Brunkow, affiliated with the a research center in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an genetic immune disorder in mice and humans that led to the discovery of a gene critical for how regulatory T-cells operate.

"Their pioneering work has revealed how the body's defenses is controlled by regulatory T cells, stopping it from mistakenly targeting the body's own tissues," said a prominent physiology specialist.

"The work is a remarkable example of how fundamental biological research can have broad consequences for human health."