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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 attacks harmful pathogens while protecting the body's own cells.

A trio of renowned researchers—Japan's Shimon Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—received this honor.

The research identified specialized "sentinels" within the immune system that remove rogue defense cells that could harming the organism.

The discoveries are now paving the way for new treatments for immune disorders and cancer.

These laureates will share a monetary award worth 11 million Swedish kronor.

Crucial Discoveries

"The research has been essential for understanding how the immune system operates and the reason we don't all develop severe autoimmune diseases," commented the chair of the award panel.

This team's studies explain a core question: How does the immune system defend us from numerous infections while keeping our healthy cells intact?

Our immune system employs immune cells that scan for signs of infection, including viruses and bacteria it has never encountered.

These defenders utilize sensors—known as recognition units—that are produced by chance in countless variations.

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

Protectors of the Immune System

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

The latest Nobel Prize recognizes the identification of regulatory T-cells—described as the body's "peacekeepers"—which travel through the body to neutralize any defenders that attack the body's own tissues.

We know that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and RA.

The prize committee stated, "The discoveries have laid the foundation for a novel area of investigation and spurred the development of innovative treatments, for instance for tumors and autoimmune diseases."

In cancer, T-regs block the body from attacking the growth, so studies are aimed at reducing their numbers.

In autoimmune diseases, trials are exploring boosting T-reg cells so the organism is not being harmed. A comparable approach could also be effective in reducing the risks of transplanted organ rejection.

Pioneering Experiments

Prof Shimon Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus extracted, causing autoimmune disease.

The researcher showed that injecting immune cells from healthy animals could stop the illness—implying there was a mechanism for preventing immune cells from harming the body.

Mary Brunkow, from the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an inherited autoimmune disease in rodents and humans that resulted in the identification of a genetic factor vital for how T-regs operate.

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

"The work is a striking example of how basic physiological study can have far-reaching consequences for human health."