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This year's Nobel Prize in medical science has been awarded for revolutionary discoveries that clarify how the body's defense network targets harmful infections while protecting the body's own cells.

Three renowned scientists—from Japan Shimon Sakaguchi and American scientists Dr. Brunkow and Dr. Ramsdell—share this accolade.

The work identified specialized "security guards" within the defense system that remove malfunctioning defense cells that could harming the organism.

These findings are now paving the way for new treatments for immune disorders and cancer.

These winners will divide a monetary award valued at 11 million Swedish kronor.

Decisive Discoveries

"The work has been essential for comprehending how the immune system functions and the reason we don't all develop severe self-attack conditions," commented the head of the award panel.

The team's studies explain a core mystery: How does the defense system protect us from numerous infections while keeping our healthy cells unharmed?

The immune system employs white blood cells that scan for signs of disease, even viruses and bacteria it has not met before.

Such defenders utilize detectors—called receptors—that are produced by chance in countless combinations.

That provides the immune system the ability to combat a wide array of threats, but the unpredictability of the process inevitably produces white blood cells that may target the body.

Security Guards of the Body

Researchers previously knew that a portion of these problematic white blood cells were destroyed in the immune organ—where immune cells mature.

The latest Nobel Prize recognizes the discovery of T-reg cells—known as the body's "security guards"—which patrol the body to disarm other immune cells that assault the healthy cells.

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

The prize committee stated, "The discoveries have laid the foundation for a novel area of investigation and accelerated the creation of innovative therapies, for example for tumors and immune disorders."

In malignancies, regulatory T-cells prevent the system from attacking the growth, so studies are focused on lowering their quantity.

For autoimmune diseases, experiments are testing increasing T-reg cells so the body is no longer being harmed. A similar approach could also be useful in minimizing the chances of transplanted organ rejection.

Pioneering Experiments

Prof Shimon Sakaguchi, of a Japanese institution, performed tests on rodents that had their immune gland removed, leading to autoimmune disease.

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

Dr. Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at a biotech firm in San Francisco, were studying an genetic autoimmune disease in mice and people that led to the identification of a genetic factor critical for how T-regs operate.

"The groundbreaking work has revealed how the immune system is kept in check by T-reg cells, preventing it from mistakenly targeting the healthy cells," commented a leading biological science specialist.

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