🔗 Share this article

The Nobel Prize in medical science has been awarded for transformative discoveries that illuminate how the immune system attacks dangerous infections while sparing the body's own cells.

Three renowned scientists—from Japan Prof. Sakaguchi and US experts Dr. Brunkow and Fred Ramsdell—received this accolade.

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

The findings are now paving the way for innovative therapies for immune disorders and cancer.

These winners will divide a monetary award worth 11 million Swedish kronor.

Decisive Findings

"The work has been essential for comprehending how the immune system functions and why we don't all suffer from severe autoimmune diseases," commented the chair of the Nobel Committee.

The trio's studies address a core mystery: In what way does the immune system protect us from numerous invaders while leaving our healthy cells intact?

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

These cells utilize detectors—called receptors—that are generated randomly in a vast number of variations.

This provides the defense network the ability to combat a broad range of invaders, but the unpredictability of the process inevitably produces white blood cells that may target the body.

Protectors of the Body

Researchers earlier understood that a portion of these harmful white blood cells were eliminated in the thymus—the site where white blood cells develop.

The latest award recognizes the identification of regulatory T-cells—described as the body's "peacekeepers"—which travel through the system to disarm any immune cells that assault the healthy cells.

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

The Nobel panel stated, "These findings have established a novel area of research and spurred the development of innovative treatments, for instance for tumors and autoimmune diseases."

In malignancies, T-regs prevent the system from fighting the growth, so research are aimed at lowering their numbers.

For self-attack disorders, experiments are testing boosting regulatory T-cells so the body is not under attack. A similar approach could also be effective in minimizing the risks of transplanted organ failure.

Pioneering Experiments

Professor Shimon Sakaguchi, from Osaka University, conducted tests on mice that had their thymus extracted, causing autoimmune disease.

He showed that injecting immune cells from healthy animals could stop the disease—suggesting there was a system for preventing immune cells from attacking the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Dr. Ramsdell, now at a biotech firm in a California city, were investigating an genetic immune disorder in rodents and humans that resulted in the discovery of a gene vital for the way regulatory T-cells function.

"Their groundbreaking research has uncovered how the immune system is controlled by regulatory T cells, preventing it from mistakenly targeting the body's own tissues," said a leading biological science expert.

"This work is a striking example of how basic biological research can have far-reaching consequences for public health."