Prestigious Award Honors Pioneering Immune System Discoveries

This year's prestigious award in Physiology or Medicine was awarded for transformative findings that clarify how the body's defense network targets harmful infections while sparing the body's own cells.

Three renowned scientists—from Japan Shimon Sakaguchi and American experts Dr. Brunkow and Fred Ramsdell—share this honor.

The work identified unique "security guards" within the immune system that remove rogue defense cells that could attacking the body.

The findings are now paving the way for new therapies for autoimmune diseases and cancer.

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

Decisive Discoveries

"The work has been decisive for comprehending how the immune system functions and the reason we do not all develop severe autoimmune diseases," stated the head of the award panel.

The team's research address a core mystery: In what way does the defense system protect us from numerous infections while keeping our healthy cells unharmed?

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

These defenders utilize detectors—known as recognition units—that are generated by chance in countless variations.

That provides the immune system the ability to combat a broad range of threats, but the unpredictability of the mechanism inevitably produces white blood cells that can attack the host.

Protectors of the Immune System

Scientists earlier understood that some of these harmful defense cells were destroyed in the immune organ—the site where immune cells mature.

The latest award honors the discovery of T-reg cells—described as the immune system's "security guards"—which travel through the system to neutralize other immune cells that attack the body's own tissues.

It is known that this mechanism malfunctions in self-attack conditions such as juvenile diabetes, multiple sclerosis, and RA.

The prize committee added, "These findings have established a new field of research and spurred the creation of new therapies, for instance for tumors and immune disorders."

Regarding malignancies, regulatory T-cells prevent the system from attacking the tumor, so research are focused on reducing their numbers.

For autoimmune diseases, trials are testing boosting regulatory T-cells so the body is no longer under attack. A comparable approach could also be effective in reducing the chances of transplanted organ failure.

Pioneering Studies

Professor Shimon Sakaguchi, from a Japanese institution, conducted tests on rodents that had their thymus removed, causing autoimmune disease.

He showed that injecting immune cells from other mice could stop the illness—suggesting there was a mechanism for preventing immune cells from harming the host.

Mary Brunkow, affiliated with the a research center in a US city, and Dr. Ramsdell, now at a biotech firm in San Francisco, were investigating an inherited autoimmune disease in rodents and people that led to the discovery of a genetic factor critical for the way regulatory T-cells function.

"The groundbreaking work has uncovered how the body's defenses is controlled by regulatory T cells, stopping it from accidentally attacking the healthy cells," said a leading physiology specialist.

"This work is a striking example of how basic biological research can have broad implications for public health."