Prestigious Award Honors Groundbreaking Immune System Research

The prestigious award in Physiology or Medicine has been granted for revolutionary discoveries that clarify how the immune system targets harmful pathogens while sparing the body's own cells.

A trio of esteemed researchers—Japan's Prof. Sakaguchi and American experts Mary Brunkow and Fred Ramsdell—share this accolade.

Their research identified specialized "sentinels" within the immune system that eliminate rogue immune cells capable of attacking the organism.

The discoveries are now enabling new treatments for autoimmune diseases and cancer.

These winners will share a monetary award worth 11m SEK.

Crucial Discoveries

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

This team's studies explain a core question: How does the defense system defend us from countless infections while leaving our own tissues intact?

The immune system uses white blood cells that search for indicators of disease, even pathogens and germs it has not met before.

These cells employ detectors—known as receptors—that are generated randomly in a vast number of combinations.

This gives the immune system the capacity to fight a wide array of invaders, but the randomness of the process unavoidably produces white blood cells that may attack the host.

Protectors of the Immune System

Scientists earlier knew that some of these problematic white blood cells were eliminated in the thymus—where white blood cells mature.

The latest award honors the identification of regulatory T-cells—described as the body's "security guards"—which travel through the body to neutralize any defenders that assault the body's own tissues.

We know that this process fails in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and RA.

The Nobel panel stated, "These discoveries have established a novel area of investigation and spurred the development of new therapies, for example for cancer and immune disorders."

Regarding cancer, T-regs prevent the system from attacking the tumor, so studies are focused on reducing their numbers.

In self-attack disorders, experiments are exploring boosting T-reg cells so the body is not under attack. A similar approach could also be effective in minimizing the risks of organ transplant rejection.

Innovative Studies

Professor Shimon Sakaguchi, of a Japanese institution, performed tests on rodents that had their thymus removed, leading to self-attack conditions.

He showed that introducing defense cells from other animals could stop the illness—implying there was a system for preventing defenders from attacking the body.

Mary Brunkow, affiliated with the a research center in a US city, and Dr. Ramsdell, currently at a biotech firm in a California city, were studying an genetic immune disorder in rodents and humans that led to the identification of a gene critical for how regulatory T-cells operate.

"The pioneering research has uncovered how the immune system is kept in check by T-reg cells, preventing it from mistakenly targeting the healthy cells," said a leading biological science specialist.

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