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This year's prestigious award in medical science has been granted for revolutionary discoveries that illuminate how the body's defense network attacks dangerous pathogens while protecting the body's own cells.

A trio of esteemed researchers—Japan's Shimon Sakaguchi and American scientists Dr. Brunkow and Fred Ramsdell—share this honor.

Their research uncovered specialized "security guards" within the defense system that remove rogue immune cells capable of harming the organism.

These discoveries are now paving the way for innovative treatments for autoimmune diseases and malignancies.

These winners will divide a monetary award worth 11m SEK.

Decisive Discoveries

"Their research has been essential for comprehending how the body's defenses operates and the reason we don't all develop serious self-attack conditions," stated the chair of the Nobel Committee.

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

Our immune system employs immune cells that scan for signs of disease, including pathogens and germs it has not met before.

Such defenders utilize detectors—called receptors—that are produced randomly in a vast number of variations.

That provides the immune system the ability to combat a broad range of invaders, but the randomness of the process unavoidably creates white blood cells that can attack the host.

Security Guards of the Body

Scientists earlier knew that a portion of these problematic defense cells were destroyed in the thymus—the site where immune cells develop.

The latest Nobel Prize recognizes the identification of T-reg cells—described as the body's "peacekeepers"—which patrol the system to neutralize any immune cells that assault the body's own tissues.

It is known that this process malfunctions in autoimmune diseases such as juvenile diabetes, MS, and RA.

A Nobel panel added, "These findings have established a novel area of research and accelerated the creation of innovative treatments, for example for tumors and autoimmune diseases."

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

For autoimmune diseases, experiments are exploring increasing T-reg cells so the organism is no longer under attack. A similar approach could also be useful in minimizing the chances of organ transplant failure.

Pioneering Studies

Prof Shimon Sakaguchi, of Osaka University, performed experiments on mice that had their immune gland removed, leading to autoimmune disease.

The researcher showed that injecting immune cells from other animals could prevent the disease—implying there was a mechanism for blocking immune cells from attacking the host.

Dr. Brunkow, from the a research center in a US city, and Dr. Ramsdell, now at a biotech firm in a California city, were studying an genetic autoimmune disease in mice and humans that resulted in the discovery of a genetic factor critical for the way regulatory T-cells function.

"The groundbreaking work has revealed how the body's defenses is kept in check by regulatory T cells, stopping it from accidentally targeting the healthy cells," said a prominent physiology expert.

"The research is a striking example of how basic biological research can have far-reaching implications for human health."