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This year's Nobel Prize in medical science was granted for transformative discoveries that illuminate how the body's defense network attacks dangerous pathogens while protecting the healthy tissues.

Three esteemed scientists—Japan's Shimon Sakaguchi and American scientists Dr. Brunkow and Fred Ramsdell—share this accolade.

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

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

The winners will divide a monetary award valued at 11m SEK.

Crucial Findings

"The research has been decisive for understanding how the body's defenses functions and why we don't all suffer from severe self-attack conditions," commented the head of the Nobel Committee.

The trio's research address a core question: How does the immune system defend us from numerous invaders while keeping our own tissues unharmed?

The body's protection system uses immune cells that search for indicators of infection, even pathogens and germs it has never encountered.

Such cells employ detectors—known as recognition units—that are generated by chance in countless variations.

This provides the immune system the ability to combat a wide array of threats, but the unpredictability of the mechanism unavoidably produces immune cells that can target the host.

Security Guards of the Immune System

Scientists earlier knew that some of these harmful white blood cells were destroyed in the thymus—the site where immune cells develop.

The latest Nobel Prize recognizes the identification of regulatory T-cells—described as the immune system's "peacekeepers"—which patrol the system to disarm 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 rheumatoid arthritis.

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

Regarding malignancies, regulatory T-cells prevent the body from attacking the growth, so research are focused on reducing their numbers.

For self-attack disorders, trials are exploring boosting T-reg cells so the body is not being harmed. A similar approach could also be useful in minimizing the risks of organ transplant failure.

Innovative Studies

Professor Sakaguchi, of a Japanese institution, conducted experiments on rodents that had their thymus extracted, causing self-attack conditions.

The researcher demonstrated that introducing immune cells from healthy animals could prevent the illness—implying there was a mechanism for preventing defenders from attacking the host.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited immune disorder in rodents and people that led to the identification of a gene vital for the way regulatory T-cells function.

"The pioneering work has revealed how the body's defenses is controlled by T-reg cells, preventing it from mistakenly attacking the healthy cells," said a prominent physiology specialist.

"This research is a striking example of how basic physiological research can have far-reaching consequences for human health."