Prestigious Award Recognizes Pioneering Body's Defenses Discoveries

This year's prestigious award in medical science was granted for revolutionary discoveries that clarify how the body's defense network attacks harmful infections while protecting the healthy tissues.

Three esteemed researchers—from Japan Prof. Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—share this honor.

Their work uncovered unique "security guards" within the immune system that remove malfunctioning defense cells that could attacking the body.

These findings are now paving the way for new therapies for immune disorders and cancer.

These winners will share a prize fund valued at 11m Swedish kronor.

Decisive Discoveries

"The research has been essential for comprehending how the body's defenses operates and why we don't all suffer from severe self-attack conditions," commented the head of the Nobel Committee.

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

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

Such cells employ sensors—called receptors—that are generated randomly in countless combinations.

This gives the immune system the ability to combat a wide array of invaders, but the unpredictability of the process unavoidably produces white blood cells that can target the host.

Security Guards of the Body

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

The latest Nobel Prize recognizes the identification of T-reg cells—described as the immune system's "peacekeepers"—which travel through the body to neutralize any immune cells that assault the body's own tissues.

It is known that this mechanism malfunctions in self-attack conditions such as type-1 diabetes, multiple sclerosis, and RA.

A prize committee stated, "The discoveries have established a new field of investigation and accelerated the development of new treatments, for instance for cancer and autoimmune diseases."

In cancer, T-regs prevent the body from fighting the tumor, so research are aimed at reducing their numbers.

For autoimmune diseases, trials are testing boosting regulatory T-cells so the organism is not under attack. A comparable approach could also be effective in reducing the risks of organ transplant failure.

Pioneering Studies

Professor Shimon Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus removed, leading to autoimmune disease.

He demonstrated that injecting defense cells from healthy animals could prevent the disease—suggesting there was a mechanism for blocking defenders from attacking the host.

Mary Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited autoimmune disease in rodents and humans that resulted in the identification of a genetic factor critical for how regulatory T-cells function.

"Their pioneering work has revealed how the immune system is controlled by regulatory T cells, preventing it from mistakenly attacking the body's own tissues," commented a prominent physiology expert.

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