Prestigious Prize Recognizes Pioneering Body's Defenses Discoveries

This year's prestigious award in medical science has been granted for revolutionary findings that clarify how the body's defense network attacks harmful infections while sparing the healthy tissues.

A trio of esteemed researchers—from Japan Shimon Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—received this accolade.

The research identified specialized "security guards" within the immune system that remove malfunctioning immune cells capable of attacking the organism.

These discoveries are now paving the way for innovative therapies for autoimmune diseases and malignancies.

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

Decisive Findings

"The work has been decisive for comprehending how the body's defenses operates and the reason we don't all suffer from severe autoimmune diseases," stated the chair of the award panel.

This trio's research address a fundamental question: In what way does the immune system defend us from countless infections while leaving our healthy cells unharmed?

Our body's protection system employs white blood cells that scan for indicators of infection, even pathogens and germs it has not met before.

These defenders employ sensors—called recognition units—that are generated by chance in a vast number of combinations.

That provides the immune system the capacity to combat a broad range of threats, but the unpredictability of the mechanism inevitably produces immune cells that may target the host.

Protectors of the Immune System

Researchers earlier knew that some of these harmful defense cells were destroyed in the immune organ—the site where immune cells develop.

This year's award honors the identification of regulatory T-cells—described as the body's "security guards"—which patrol the system to disarm other immune cells that assault the body's own tissues.

We know that this mechanism fails in self-attack conditions such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

A Nobel panel stated, "The findings have established a new field of research and accelerated the development of new therapies, for example for cancer and autoimmune diseases."

In cancer, regulatory T-cells prevent the body from attacking the tumor, so studies are focused on lowering their quantity.

For autoimmune diseases, trials are testing boosting T-reg cells so the organism is not being harmed. A similar approach could also be effective in minimizing the chances of transplanted organ failure.

Innovative Experiments

Professor Sakaguchi, from a Japanese institution, performed tests on mice that had their thymus removed, causing autoimmune disease.

He demonstrated that introducing defense cells from healthy mice could prevent the disease—suggesting there was a system for preventing immune cells from attacking the host.

Dr. 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 inherited autoimmune disease in rodents and humans that resulted in the identification of a genetic factor critical for how regulatory T-cells operate.

"Their groundbreaking work has uncovered how the body's defenses is controlled by regulatory T cells, preventing it from mistakenly attacking the healthy cells," commented a leading biological science expert.

"This work is a striking illustration of how basic physiological study can have broad consequences for human health."