Prestigious Award Recognizes Pioneering Body's Defenses Research

This year's Nobel Prize in Physiology or Medicine was granted for revolutionary discoveries that illuminate how the body's defense network targets dangerous pathogens while protecting the healthy tissues.

A trio of renowned researchers—from Japan Shimon Sakaguchi and American experts Mary Brunkow and Dr. Ramsdell—received this honor.

Their work identified specialized "sentinels" within the immune system that remove rogue immune cells that could attacking the body.

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

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

Decisive Discoveries

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

This trio's research explain a core question: In what way does the immune system defend us from numerous infections while leaving our healthy cells intact?

The immune system uses immune cells that scan for signs of infection, including viruses and germs it has never encountered.

Such cells utilize sensors—called recognition units—that are generated randomly in a vast number of variations.

This provides the immune system the capacity to fight a broad range of threats, but the randomness of the mechanism unavoidably produces white blood cells that can target the body.

Security Guards of the Immune System

Researchers earlier knew that a portion of these problematic white blood cells were destroyed in the immune organ—where white blood cells mature.

This year's award honors the identification of T-reg cells—known as the immune system's "security guards"—which travel through the body to disarm any defenders that attack the healthy cells.

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

A Nobel panel added, "These findings have laid the foundation for a new field of investigation and accelerated the development of new treatments, for instance for cancer and autoimmune diseases."

In malignancies, T-regs block the system from attacking the tumor, so research are aimed at lowering their numbers.

For self-attack disorders, trials are exploring increasing T-reg cells so the organism is no longer under attack. A comparable method could also be useful in reducing the chances of transplanted organ rejection.

Innovative Experiments

Professor Sakaguchi, from Osaka University, conducted tests on mice that had their immune gland extracted, causing self-attack conditions.

The researcher showed that introducing immune cells from other animals could stop the illness—suggesting there was a mechanism for preventing immune cells from harming the body.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were investigating an inherited autoimmune disease in mice and humans that led to the identification of a gene critical for the way T-regs function.

"Their groundbreaking research has revealed how the body's defenses is kept in check by T-reg cells, stopping it from mistakenly targeting the body's own tissues," said a leading physiology expert.

"The work is a striking illustration of how basic physiological study can have far-reaching implications for public health."