Nobel Prize Recognizes Pioneering Immune System Research

This year's Nobel Prize in medical science has been granted for revolutionary findings that clarify how the immune system targets harmful pathogens while sparing the body's own cells.

Three renowned researchers—from Japan Prof. Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—share this accolade.

Their work uncovered unique "security guards" within the immune system that eliminate rogue immune cells that could attacking the organism.

The discoveries are now paving the way for innovative treatments for immune disorders and cancer.

The laureates will share a monetary award valued at 11m SEK.

Decisive Discoveries

"Their work has been decisive for comprehending how the body's defenses operates and why we don't all develop severe autoimmune diseases," commented the head of the award panel.

This team's research address a fundamental question: How does the defense system defend us from countless infections while leaving our healthy cells unharmed?

The body's protection system uses immune cells that scan for indicators of disease, even pathogens and bacteria it has not met before.

Such defenders utilize detectors—called receptors—that are produced by chance in a vast number of combinations.

This provides the immune system the ability to combat a broad range of invaders, but the randomness of the mechanism inevitably creates white blood cells that can attack the host.

Protectors of the Immune System

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

The latest award recognizes the identification of regulatory T-cells—described as the body's "peacekeepers"—which travel through the body to disarm other immune cells that assault the body's own tissues.

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

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

Regarding cancer, regulatory T-cells block the system from fighting the growth, so research are aimed at reducing their quantity.

In self-attack disorders, trials are testing boosting regulatory T-cells so the organism is no longer being harmed. A similar method could also be effective in reducing the chances of organ transplant failure.

Innovative Experiments

Prof Sakaguchi, from a Japanese institution, conducted experiments on rodents that had their immune gland removed, causing self-attack conditions.

The researcher demonstrated that injecting immune cells from other animals could prevent the disease—implying there was a mechanism for blocking immune cells from harming the body.

Dr. Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, now at a biotech firm in a California city, were studying an genetic immune disorder in rodents and people that resulted in the identification of a gene vital for the way T-regs operate.

"Their groundbreaking research has revealed how the body's defenses is kept in check by T-reg cells, preventing it from accidentally attacking the body's own tissues," said a prominent physiology specialist.

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