Nobel Award Recognizes Pioneering Body's Defenses Research

The prestigious award in Physiology or Medicine has been awarded for revolutionary findings that clarify how the immune system attacks harmful pathogens while sparing the healthy tissues.

Three esteemed scientists—Japan's Shimon Sakaguchi and US experts Mary Brunkow and Fred Ramsdell—received this accolade.

Their work uncovered unique "security guards" within the defense system that eliminate malfunctioning defense cells capable of attacking the organism.

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

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

Decisive Discoveries

"Their work has been decisive for comprehending how the body's defenses functions and the reason we do not all develop serious self-attack conditions," commented the head of the award panel.

This trio's research explain a core question: How does the immune system defend us from numerous infections while leaving our healthy cells unharmed?

Our immune system employs immune cells that scan for signs of infection, including pathogens and bacteria it has not met before.

Such cells employ detectors—known as recognition units—that are produced by chance in countless combinations.

This provides the immune system the ability to combat a wide array of threats, but the randomness of the mechanism unavoidably produces immune cells that can attack the body.

Protectors of the Immune System

Scientists earlier understood that some of these problematic white blood cells were eliminated in the immune organ—the site where white blood cells mature.

This year's award honors the identification of regulatory T-cells—known as the body's "security guards"—which travel through the body to neutralize any immune cells that assault the healthy cells.

We know that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

The prize committee stated, "The findings have established a novel area of investigation and accelerated the development of innovative therapies, for instance for tumors and immune disorders."

In malignancies, regulatory T-cells block the body from fighting the growth, so studies are aimed at lowering their quantity.

For autoimmune diseases, experiments are exploring increasing regulatory T-cells so the body is no longer being harmed. A similar method could also be useful in reducing the risks of transplanted organ rejection.

Innovative Experiments

Prof Shimon Sakaguchi, from Osaka University, conducted experiments on mice that had their thymus extracted, causing autoimmune disease.

He showed that injecting defense cells from healthy mice could stop the disease—suggesting there was a mechanism for preventing defenders from attacking the host.

Dr. Brunkow, affiliated with the a research center in a US city, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited autoimmune disease in rodents and humans that led to the identification of a gene critical for the way regulatory T-cells function.

"Their groundbreaking research has uncovered how the body's defenses is kept in check by regulatory T cells, stopping it from accidentally attacking the body's own tissues," commented a prominent physiology specialist.

"This work is a remarkable example of how basic biological study can have far-reaching consequences for human health."