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The Nobel Prize in medical science has been granted for revolutionary findings that illuminate how the immune system targets dangerous infections while sparing the healthy tissues.

Three renowned scientists—Japan's Shimon Sakaguchi and American experts Mary Brunkow and Dr. Ramsdell—received this honor.

The work identified specialized "security guards" within the immune system that remove malfunctioning immune cells that could attacking the body.

These findings are now enabling innovative treatments for autoimmune diseases and malignancies.

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

Crucial Findings

"Their work has been essential for understanding how the body's defenses functions and the reason we do not all develop severe self-attack conditions," commented the chair of the Nobel Committee.

This team's research explain a fundamental mystery: In what way does the immune system defend us from numerous infections while leaving our own tissues unharmed?

The immune system employs white blood cells that scan for indicators of infection, including pathogens and bacteria it has not met before.

Such defenders employ detectors—known as receptors—that are produced by chance in countless variations.

This provides the defense network the ability to combat a broad range of invaders, but the unpredictability of the process unavoidably creates white blood cells that may attack the host.

Security Guards of the Body

Researchers previously understood that some of these harmful defense cells were destroyed in the thymus—the site where immune cells mature.

This year's Nobel Prize honors the identification of regulatory T-cells—known as the body's "security guards"—which travel through the body to disarm any immune cells that assault the healthy cells.

It is known that this process fails in self-attack conditions such as type-1 diabetes, MS, and rheumatoid arthritis.

A Nobel panel stated, "The findings have laid the foundation for a novel area of research and spurred the development of new therapies, for instance for cancer and autoimmune diseases."

Regarding malignancies, regulatory T-cells prevent the body from fighting the growth, so studies are focused on lowering their numbers.

For self-attack disorders, trials are exploring boosting regulatory T-cells so the organism is not being harmed. A comparable approach could also be effective in minimizing the risks of organ transplant failure.

Innovative Experiments

Prof Sakaguchi, from a Japanese institution, conducted tests on rodents that had their thymus extracted, leading to autoimmune disease.

The researcher showed that introducing defense cells from healthy animals could prevent the disease—implying there was a mechanism for preventing immune cells from harming the body.

Mary Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were investigating an inherited autoimmune disease in mice and humans that resulted in the discovery of a gene critical for how regulatory T-cells function.

"The groundbreaking work has uncovered how the body's defenses is kept in check by T-reg cells, stopping it from mistakenly attacking the body's own tissues," commented a prominent biological science expert.

"This research is a striking illustration of how fundamental biological study can have broad consequences for public health."