🔗 Share this article

This year's Nobel Prize in medical science was granted for transformative findings that clarify how the body's defense network targets harmful infections while sparing the healthy tissues.

A trio of esteemed scientists—from Japan Prof. Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—share this honor.

The work uncovered unique "security guards" within the immune system that remove malfunctioning immune cells that could attacking the organism.

These findings are now enabling new treatments for immune disorders and malignancies.

The laureates will share a monetary award valued at 11 million SEK.

Crucial Findings

"Their work has been essential for comprehending how the body's defenses functions and the reason we do not all develop serious autoimmune diseases," commented the chair of the Nobel Committee.

The team's studies address a fundamental question: In what way does the immune system defend us from numerous invaders while leaving our healthy cells intact?

The body's protection system employs white blood cells that search for signs of infection, even pathogens and bacteria it has not met before.

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

This gives the immune system the capacity to fight a wide array of invaders, but the unpredictability of the process inevitably produces white blood cells that can target the body.

Protectors of the Body

Scientists earlier understood that some of these harmful defense cells were destroyed in the immune organ—the site where white blood cells mature.

This year's award honors the discovery of regulatory T-cells—described as the body's "peacekeepers"—which travel through the system to neutralize any defenders that assault the body's own tissues.

It is known that this mechanism malfunctions in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and RA.

The prize committee added, "The findings have laid the foundation for a new field of research and spurred the development of innovative therapies, for example for cancer and autoimmune diseases."

In malignancies, T-regs prevent the system from attacking the tumor, so research are focused on lowering their numbers.

In autoimmune diseases, experiments are exploring boosting regulatory T-cells so the organism is not being harmed. A comparable method could also be useful in minimizing the chances of transplanted organ rejection.

Innovative Studies

Professor Sakaguchi, of Osaka University, conducted tests on mice that had their thymus extracted, leading to self-attack conditions.

The researcher showed that injecting defense cells from healthy animals could stop the disease—implying there was a mechanism for preventing immune cells from attacking the body.

Mary Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, now at a biotech firm in San Francisco, were investigating an inherited immune disorder in rodents and people that resulted in the identification of a gene critical for how T-regs operate.

"Their groundbreaking work has revealed how the body's defenses is controlled by regulatory T cells, preventing it from accidentally targeting the healthy cells," said a prominent biological science specialist.

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