🔗 Share this article

This year's prestigious award in Physiology or Medicine has been granted for transformative findings that illuminate how the body's defense network attacks dangerous pathogens while protecting the healthy tissues.

Three esteemed researchers—Japan's Shimon Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—received this honor.

Their work identified specialized "sentinels" within the defense system that remove rogue defense cells capable of harming the organism.

The findings are now paving the way for new treatments for immune disorders and malignancies.

The laureates will share a prize fund valued at 11 million Swedish kronor.

Crucial Findings

"The research has been essential for comprehending how the body's defenses operates and why we do not all suffer from serious autoimmune diseases," commented the chair of the Nobel Committee.

The trio's research address a fundamental mystery: How does the immune system defend us from numerous infections while keeping our own tissues intact?

Our immune system uses white blood cells that scan for signs of disease, even pathogens and germs it has never encountered.

These defenders utilize sensors—known as recognition units—that are generated randomly in countless variations.

That provides the immune system the ability to combat a broad range of invaders, but the unpredictability of the process inevitably creates immune cells that may target the host.

Protectors of the Body

Researchers previously understood that a portion of these problematic white blood cells were eliminated in the immune organ—the site where white blood cells develop.

This year's award recognizes the discovery of T-reg cells—described as the body's "peacekeepers"—which travel through the system to neutralize other defenders that assault the body's own tissues.

We know that this mechanism malfunctions in autoimmune diseases such as juvenile diabetes, MS, and rheumatoid arthritis.

The Nobel panel added, "The discoveries have laid the foundation for a novel area of investigation and spurred the development of new therapies, for instance for cancer and autoimmune diseases."

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

For autoimmune diseases, experiments are testing boosting regulatory T-cells so the body is not being harmed. A comparable approach could also be effective in reducing the chances of organ transplant failure.

Pioneering Experiments

Professor Shimon Sakaguchi, from Osaka University, performed tests on mice that had their immune gland extracted, leading to autoimmune disease.

The researcher demonstrated that injecting defense cells from healthy animals could stop the illness—implying there was a mechanism for blocking defenders from harming the body.

Mary 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 genetic immune disorder in mice and humans that resulted in the discovery of a gene vital for the way regulatory T-cells operate.

"Their groundbreaking research has uncovered how the body's defenses is kept in check by T-reg cells, stopping it from accidentally targeting the healthy cells," said a leading biological science specialist.

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