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This year's Nobel Prize in Physiology or Medicine has been awarded for revolutionary discoveries that clarify how the immune system targets dangerous pathogens while protecting the healthy tissues.

Three renowned researchers—from Japan Shimon Sakaguchi and American experts Dr. Brunkow and Fred Ramsdell—share this honor.

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

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

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

Crucial Findings

"The work has been essential for understanding how the body's defenses functions and the reason we do not all suffer from serious self-attack conditions," stated the chair of the Nobel Committee.

The trio's research explain a core question: How does the defense system defend us from countless invaders while leaving our own tissues intact?

The body's protection system uses white blood cells that scan for indicators of disease, including pathogens and germs it has never encountered.

These defenders utilize detectors—known as receptors—that are generated randomly in a vast number of variations.

This 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 can target the host.

Protectors of the Body

Scientists earlier knew that a portion of these problematic defense cells were eliminated in the thymus—where white blood cells develop.

The latest award honors the identification of regulatory T-cells—described as the body's "security guards"—which travel through the body to disarm other defenders that attack the healthy cells.

We know that this process fails in self-attack conditions such as juvenile diabetes, MS, and rheumatoid arthritis.

A Nobel panel added, "These discoveries have laid the foundation for a new field of investigation and spurred the development of new therapies, for example for tumors and autoimmune diseases."

Regarding cancer, regulatory T-cells block the body from fighting the tumor, so studies are aimed at lowering their numbers.

For autoimmune diseases, trials are exploring boosting T-reg cells so the body is not being harmed. A comparable method could also be effective in reducing the chances of transplanted organ failure.

Innovative Studies

Professor Sakaguchi, of Osaka University, conducted experiments on rodents that had their immune gland removed, causing self-attack conditions.

The researcher showed that injecting defense cells from healthy animals could stop the disease—suggesting there was a system for blocking defenders from harming the body.

Mary Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in a California city, were investigating an inherited autoimmune disease in mice and people that led to the identification of a gene vital for how T-regs operate.

"The groundbreaking research has uncovered how the body's defenses is controlled by regulatory T cells, preventing it from mistakenly targeting the body's own tissues," commented a prominent biological science expert.

"The research is a remarkable example of how fundamental physiological research can have far-reaching consequences for public health."