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The prestigious award in medical science was granted for revolutionary discoveries that illuminate how the immune system attacks harmful pathogens while sparing the body's own cells.

Three esteemed scientists—from Japan Prof. Sakaguchi and US scientists Dr. Brunkow and Fred Ramsdell—share this accolade.

The research uncovered specialized "security guards" within the immune system that remove rogue defense cells capable of attacking the organism.

The findings are now paving the way for innovative therapies for autoimmune diseases and malignancies.

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

Crucial Findings

"Their research has been decisive for understanding how the body's defenses operates and why we do not all suffer from serious self-attack conditions," commented the chair of the award panel.

This trio's research explain a core mystery: In what way does the defense system protect us from countless invaders while leaving our healthy cells intact?

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

These cells utilize detectors—called receptors—that are produced by chance in a vast number of combinations.

This gives the defense network the ability to combat a wide array of invaders, but the unpredictability of the process unavoidably creates immune cells that may attack the host.

Protectors of the Immune System

Scientists previously knew that a portion of these problematic white blood cells were eliminated in the thymus—where white blood cells develop.

The latest award honors the discovery of regulatory T-cells—known as the body's "security guards"—which patrol the body to neutralize any defenders that attack the healthy cells.

We know that this process malfunctions in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and rheumatoid arthritis.

A prize committee stated, "These discoveries have established a new field of research and accelerated the creation of new treatments, for instance for tumors and immune disorders."

In cancer, regulatory T-cells block the system from attacking the tumor, so studies are aimed at reducing their numbers.

For autoimmune diseases, experiments are exploring increasing regulatory T-cells so the body is not being harmed. A similar approach could also be effective in reducing the chances of transplanted organ failure.

Innovative Experiments

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

The researcher demonstrated that introducing defense cells from healthy animals could stop the illness—implying there was a system for blocking defenders from attacking the host.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, now at Sonoma Biotherapeutics in a California city, were investigating an genetic autoimmune disease in mice and humans that led to the discovery of a gene vital for the way T-regs function.

"The groundbreaking research has revealed how the body's defenses is controlled by regulatory T cells, preventing it from mistakenly attacking the body's own tissues," said a prominent physiology specialist.

"The research is a striking illustration of how basic biological research can have broad consequences for public health."