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This year's Nobel Prize in Physiology or Medicine has been awarded for transformative discoveries that clarify how the body's defense network attacks dangerous pathogens while protecting the healthy tissues.

A trio of esteemed scientists—from Japan Shimon Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—share this accolade.

The work uncovered unique "sentinels" within the defense system that remove rogue immune cells capable of harming the body.

The findings are now enabling innovative therapies for immune disorders and cancer.

The laureates will divide a monetary award worth 11m SEK.

Decisive Findings

"Their research has been decisive for comprehending how the immune system functions and why we do not all suffer from severe self-attack conditions," stated the head of the Nobel Committee.

This trio's studies address a core question: In what way does the immune system protect us from numerous infections while keeping our healthy cells intact?

The body's protection system uses white blood cells that search for signs of disease, including viruses and germs it has not met before.

These defenders utilize sensors—called receptors—that are generated randomly in a vast number of combinations.

This gives the defense network the capacity to combat a broad range of invaders, but the randomness of the mechanism inevitably produces immune cells that may attack the host.

Protectors of the Immune System

Scientists earlier knew that a portion of these harmful white blood cells were eliminated in the immune organ—the site where immune cells develop.

This year's Nobel Prize recognizes the discovery of T-reg cells—known as the immune system's "security guards"—which patrol the body to neutralize any defenders that assault the body's own tissues.

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

The prize committee added, "The findings have established a new field of research and accelerated the creation of innovative treatments, for instance for tumors and immune disorders."

In malignancies, T-regs block the body from attacking the tumor, so research are aimed at reducing their quantity.

In autoimmune diseases, trials are exploring increasing T-reg cells so the body is no longer being harmed. A comparable method could also be effective in reducing the risks of transplanted organ failure.

Innovative Studies

Professor Shimon Sakaguchi, from Osaka University, performed experiments on rodents that had their immune gland removed, causing autoimmune disease.

The researcher demonstrated that injecting immune cells from healthy animals could prevent the illness—implying there was a mechanism for blocking immune cells from harming the body.

Mary Brunkow, from the a research center in a US city, and Fred Ramsdell, now at a biotech firm in San Francisco, were studying an inherited autoimmune disease in rodents and people that resulted in the discovery of a gene critical for the way regulatory T-cells function.

"The groundbreaking research has revealed how the immune system is controlled by regulatory T cells, preventing it from accidentally attacking the healthy cells," commented a leading physiology expert.

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