Nobel Award Honors Pioneering Body's Defenses Discoveries

The Nobel Prize in medical science was granted for revolutionary findings that clarify how the immune system targets harmful pathogens while sparing the healthy tissues.

Three esteemed researchers—from Japan Prof. Sakaguchi and US scientists Mary Brunkow and Dr. Ramsdell—share this honor.

Their work identified unique "sentinels" within the defense system that eliminate malfunctioning immune cells capable of attacking the body.

These discoveries are now enabling innovative therapies for immune disorders and cancer.

These laureates will share a monetary award worth 11 million SEK.

Crucial Findings

"The work has been essential for understanding how the immune system operates and why we don't all develop severe self-attack conditions," stated the chair of the Nobel Committee.

The trio's studies explain a fundamental mystery: In what way does the immune system protect us from countless infections while keeping our own tissues unharmed?

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

Such defenders utilize sensors—called receptors—that are generated randomly in a vast number of variations.

This gives the defense network the ability to combat a broad range of threats, but the randomness of the mechanism inevitably produces white blood cells that can target the host.

Protectors of the Immune System

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

The latest award honors the identification of T-reg cells—known as the immune system's "peacekeepers"—which patrol the system to disarm other immune cells that attack the healthy cells.

We know that this process fails in self-attack conditions such as type-1 diabetes, multiple sclerosis, and RA.

The Nobel panel added, "The findings have laid the foundation for a new field of research and spurred the creation of new therapies, for example for cancer and immune disorders."

In malignancies, regulatory T-cells block the system from attacking the growth, so research are aimed at lowering their quantity.

In autoimmune diseases, trials are exploring increasing T-reg cells so the body is not under attack. A comparable approach could also be effective in minimizing the chances of transplanted organ failure.

Pioneering Experiments

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

He showed that injecting defense cells from healthy mice could prevent the disease—implying there was a mechanism for blocking defenders from harming the host.

Mary Brunkow, affiliated with the a research center in a US city, and Dr. Ramsdell, now at a biotech firm in a California city, were investigating an inherited autoimmune disease in mice and humans that led to the identification of a gene critical for the way regulatory T-cells operate.

"Their groundbreaking research has uncovered how the immune system is controlled by regulatory T cells, preventing it from mistakenly attacking the healthy cells," said a prominent physiology specialist.

"This research is a striking illustration of how basic biological study can have far-reaching implications for human health."