Nobel Award Recognizes Pioneering Immune System Discoveries

The Nobel Prize in Physiology or Medicine has been granted for revolutionary findings that illuminate how the body's defense network targets dangerous pathogens while sparing the body's own cells.

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

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

These discoveries are now paving the way for innovative treatments for autoimmune diseases and cancer.

These laureates will share a monetary award worth 11 million Swedish kronor.

Decisive Findings

"The work has been essential for comprehending how the body's defenses operates and why we do not all develop serious self-attack conditions," commented the chair of the award panel.

This trio's studies explain a fundamental question: How does the defense system protect us from numerous invaders while keeping our own tissues unharmed?

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

These cells employ detectors—called recognition units—that are produced by chance in countless variations.

That provides the defense network the ability to fight a broad range of invaders, but the unpredictability of the process unavoidably creates immune cells that can target the host.

Security Guards of the Immune System

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

The latest Nobel Prize honors the discovery of T-reg cells—known as the immune system's "security guards"—which travel through the body to neutralize other immune cells that attack the healthy cells.

It is known that this process malfunctions in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and rheumatoid arthritis.

The prize committee stated, "These discoveries have established a new field of research and spurred the development of innovative therapies, for instance for tumors and autoimmune diseases."

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

In autoimmune diseases, experiments are exploring boosting T-reg cells so the organism is not under attack. A similar approach could also be useful in minimizing the risks of transplanted organ failure.

Innovative Studies

Prof Shimon Sakaguchi, from Osaka University, performed experiments on rodents that had their thymus extracted, leading to self-attack conditions.

The researcher showed that injecting immune cells from healthy animals could prevent the disease—suggesting there was a system for preventing defenders from harming the body.

Dr. Brunkow, from the a research center in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an inherited autoimmune disease in rodents and people that resulted in the identification of a gene vital for the way T-regs function.

"Their groundbreaking work has revealed how the body's defenses is controlled by regulatory T cells, preventing it from mistakenly attacking the body's own tissues," said a prominent biological science specialist.

"The work is a striking illustration of how basic physiological research can have broad implications for public health."