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This year's prestigious award in medical science has been awarded for transformative discoveries that illuminate how the body's defense network attacks harmful infections while sparing the body's own cells.

Three renowned scientists—Japan's Prof. Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—received this accolade.

Their work identified unique "sentinels" within the defense system that remove rogue defense cells capable of attacking the body.

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

These winners will share a monetary award worth 11m Swedish kronor.

Decisive Findings

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

This trio's studies address a core question: How does the defense system protect us from countless invaders while keeping our healthy cells intact?

The body's protection system uses immune cells that search for indicators of infection, including viruses and bacteria it has never encountered.

These cells employ sensors—called recognition units—that are generated randomly in a vast number of variations.

This gives the defense network the capacity to combat a broad range of invaders, but the randomness of the process unavoidably produces immune cells that can target the host.

Protectors of the Body

Scientists earlier understood that a portion of these harmful defense cells were destroyed in the thymus—where immune cells develop.

This year's Nobel Prize recognizes the identification of T-reg cells—known as the immune system's "security guards"—which patrol the body to neutralize other immune cells that attack the healthy cells.

It is known that this process fails in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and RA.

A Nobel panel added, "These discoveries have established a novel area of research and spurred the development of innovative treatments, for instance for cancer and autoimmune diseases."

Regarding cancer, regulatory T-cells block the body from attacking the growth, so studies are focused on lowering their quantity.

In autoimmune diseases, experiments are exploring boosting T-reg cells so the body is not under attack. A similar approach could also be useful in reducing the risks of transplanted organ failure.

Innovative Studies

Prof Shimon Sakaguchi, of a Japanese institution, conducted tests on mice that had their thymus extracted, causing self-attack conditions.

The researcher showed that injecting defense cells from healthy mice could prevent the illness—suggesting there was a system for preventing immune cells from attacking the host.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, now at a biotech firm in San Francisco, were studying an inherited immune disorder in mice and people that led to the discovery of a genetic factor vital for the way T-regs function.

"The groundbreaking research has revealed how the body's defenses is kept in check by T-reg cells, preventing it from accidentally attacking the healthy cells," said a prominent biological science expert.

"This work is a striking illustration of how basic biological study can have broad implications for public health."