Prestigious Prize Recognizes Pioneering Immune System Research

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

A trio of esteemed scientists—Japan's Prof. Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—share this accolade.

Their work identified specialized "security guards" within the immune system that eliminate malfunctioning defense cells capable of attacking the organism.

These findings are now enabling innovative therapies for autoimmune diseases and cancer.

The winners will share a monetary award valued at 11 million Swedish kronor.

Decisive Findings

"The work has been essential for comprehending how the body's defenses functions and why we do not all develop severe autoimmune diseases," stated the chair of the award panel.

This trio's studies address a core question: In what way does the defense system protect us from numerous invaders while leaving our healthy cells unharmed?

The body's protection system employs immune cells that scan for indicators of infection, even viruses and germs it has never encountered.

These defenders utilize detectors—called recognition units—that are produced by chance in countless combinations.

That gives the immune system the capacity to fight a broad range of invaders, but the unpredictability of the process inevitably produces white blood cells that may target the host.

Security Guards of the Immune System

Scientists previously understood that some of these harmful defense cells were eliminated in the thymus—the site where white blood cells develop.

This year's Nobel Prize recognizes the discovery of regulatory T-cells—known as the body's "security guards"—which travel through the body to neutralize other immune cells that attack the body's own tissues.

It is known that this process malfunctions in self-attack conditions such as type-1 diabetes, MS, and rheumatoid arthritis.

The prize committee added, "These findings have established a novel area of investigation and accelerated the creation of new treatments, for example for tumors and autoimmune diseases."

In cancer, T-regs prevent the body from attacking the tumor, so research are aimed at lowering their quantity.

For autoimmune diseases, experiments are testing increasing T-reg cells so the organism is no longer being harmed. A comparable approach could also be effective in minimizing the chances of transplanted organ failure.

Pioneering Experiments

Professor Sakaguchi, from Osaka University, conducted tests on rodents that had their immune gland removed, causing autoimmune disease.

The researcher demonstrated that injecting immune cells from other animals could stop the disease—suggesting there was a mechanism for preventing immune cells from harming the host.

Dr. Brunkow, from the a research center in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in a California city, were studying an genetic immune disorder in mice and humans that led to the identification of a gene critical for how T-regs operate.

"The groundbreaking work has uncovered how the immune system is kept in check by T-reg cells, preventing it from mistakenly attacking the body's own tissues," commented a leading biological science expert.

"The work is a striking example of how basic physiological study can have broad implications for human health."