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The Nobel Prize in medical science was granted for revolutionary findings that clarify how the immune system attacks dangerous pathogens while protecting the healthy tissues.

A trio of esteemed scientists—Japan's Prof. Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—share this honor.

The work identified unique "security guards" within the defense system that eliminate rogue defense cells that could harming the organism.

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

These laureates will divide a prize fund valued at 11m SEK.

Decisive Findings

"Their work has been essential for comprehending how the immune system operates and why we don't all suffer from serious self-attack conditions," stated the head of the award panel.

The trio's research explain a fundamental question: In what way does the defense system protect us from countless infections while leaving our own tissues intact?

Our immune system uses white blood cells that search for indicators of infection, even viruses and germs it has never encountered.

These defenders employ detectors—known as recognition units—that are generated randomly in a vast number of variations.

That provides the defense network the capacity to fight a broad range of threats, but the unpredictability of the process inevitably produces white blood cells that may attack the body.

Protectors of the Body

Researchers previously knew that some of these harmful white blood cells were destroyed in the thymus—where white blood cells mature.

The latest award recognizes the identification of T-reg cells—known as the body's "security guards"—which patrol the system to neutralize other defenders that assault the body's own tissues.

We know that this process malfunctions in self-attack conditions such as type-1 diabetes, MS, and RA.

The Nobel panel added, "The discoveries have laid the foundation for a new field of investigation and accelerated the development of innovative treatments, for instance for tumors and immune disorders."

In cancer, T-regs block the system from attacking the growth, so research are focused on reducing their numbers.

For autoimmune diseases, experiments are testing increasing regulatory T-cells so the organism is not being harmed. A similar method could also be effective in reducing the risks of transplanted organ failure.

Innovative Studies

Prof Sakaguchi, from a Japanese institution, conducted tests on rodents that had their thymus removed, leading to self-attack conditions.

The researcher demonstrated that injecting defense cells from other animals could stop the disease—implying there was a mechanism for blocking defenders from harming the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were studying an inherited autoimmune disease in mice and people that led to the discovery of a gene vital for how T-regs function.

"The pioneering research has revealed how the body's defenses is kept in check by T-reg cells, preventing it from accidentally targeting the body's own tissues," commented a leading biological science expert.

"The work is a striking illustration of how fundamental physiological research can have broad implications for human health."