Nobel Prize Honors Groundbreaking Body's Defenses Discoveries

The Nobel Prize in Physiology or Medicine was awarded for revolutionary findings that clarify how the immune system targets harmful pathogens while protecting the healthy tissues.

Three renowned researchers—Japan's Shimon Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—share this honor.

Their research uncovered unique "sentinels" within the immune system that eliminate rogue immune cells capable of harming the organism.

These findings are now enabling new therapies for immune disorders and cancer.

These winners will share a prize fund worth 11 million Swedish kronor.

Decisive Findings

"The research has been decisive for understanding how the immune system operates and why we don't all suffer from severe autoimmune diseases," stated the head of the award panel.

This trio's research explain a fundamental mystery: How does the immune system protect us from countless infections while leaving our healthy cells intact?

The immune system employs white blood cells that scan for indicators of infection, including pathogens and bacteria it has not met before.

Such defenders employ sensors—known as recognition units—that are generated by chance in countless variations.

This provides the immune system the ability to combat a wide array of invaders, but the randomness of the process unavoidably creates immune cells that may attack the body.

Security Guards of the Immune System

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

The latest Nobel Prize honors the discovery of regulatory T-cells—known as the body's "peacekeepers"—which travel through the body to neutralize other immune cells that assault the body's own tissues.

We know that this mechanism fails in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

A Nobel panel added, "These findings have laid the foundation for a novel area of research and spurred the creation of new treatments, for instance for cancer and autoimmune diseases."

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

In self-attack disorders, trials are testing increasing T-reg cells so the body is not under attack. A similar method could also be useful in reducing the chances of organ transplant failure.

Innovative Studies

Prof Sakaguchi, from a Japanese institution, conducted experiments on rodents that had their thymus removed, leading to self-attack conditions.

The researcher showed that injecting immune cells from healthy mice could prevent the disease—implying there was a mechanism for preventing immune cells from attacking the body.

Dr. Brunkow, from the Institute for Systems Biology in a US city, and Dr. Ramsdell, now at a biotech firm in San Francisco, were investigating an inherited autoimmune disease in mice and humans that led to the discovery of a gene critical for how T-regs operate.

"Their pioneering research has uncovered how the body's defenses is kept in check by T-reg cells, stopping it from mistakenly targeting the body's own tissues," said a leading physiology expert.

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