Nobel Prize Recognizes Pioneering Immune System Research

The Nobel Prize in medical science has been awarded for revolutionary findings that illuminate how the immune system targets dangerous infections while protecting the body's own cells.

A trio of esteemed researchers—Japan's Prof. Sakaguchi and US scientists Dr. Brunkow and Fred Ramsdell—received this honor.

The work identified specialized "sentinels" within the defense system that remove malfunctioning defense cells capable of harming the body.

The discoveries are now enabling new treatments for immune disorders and malignancies.

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

Crucial Discoveries

"The work has been decisive for comprehending how the body's defenses functions and why we don't all suffer from serious self-attack conditions," stated the chair of the Nobel Committee.

This trio's research address a fundamental mystery: In what way does the defense system protect us from numerous invaders while leaving our own tissues intact?

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

These defenders employ sensors—called recognition units—that are generated by chance in countless combinations.

That gives the immune system the capacity to combat a broad range of invaders, but the randomness of the process unavoidably creates white blood cells that can target the body.

Protectors of the Body

Scientists earlier knew that a portion of these problematic white blood cells were eliminated in the thymus—the site where white blood cells mature.

The latest Nobel Prize recognizes the discovery of T-reg cells—described as the immune system's "peacekeepers"—which travel through the system to disarm other defenders that assault the healthy cells.

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

The Nobel panel stated, "The discoveries have laid the foundation for a new field of research and accelerated the development of innovative therapies, for instance for cancer and autoimmune diseases."

Regarding cancer, regulatory T-cells block the body from fighting the tumor, so research are aimed at reducing their numbers.

For autoimmune diseases, experiments are exploring boosting T-reg cells so the body is not under attack. A comparable approach could also be effective in minimizing the risks of organ transplant rejection.

Pioneering Studies

Prof Shimon Sakaguchi, of a Japanese institution, conducted tests on mice that had their immune gland removed, leading to autoimmune disease.

He showed that injecting defense cells from healthy mice could stop the illness—suggesting there was a system for blocking defenders from harming the body.

Mary Brunkow, from the a research center in Seattle, and Dr. Ramsdell, now at Sonoma Biotherapeutics in a California city, were studying an inherited immune disorder in rodents and people that resulted in the identification of a gene vital for the way regulatory T-cells function.

"The groundbreaking research has revealed how the immune system is controlled by regulatory T cells, preventing it from accidentally targeting the body's own tissues," said a leading physiology expert.

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