Prestigious Prize Honors Pioneering Body's Defenses Research

This year's prestigious award in medical science was awarded for revolutionary findings that illuminate how the body's defense network attacks dangerous pathogens while protecting the healthy tissues.

A trio of renowned scientists—Japan's Prof. Sakaguchi and American experts Mary Brunkow and Dr. Ramsdell—share this honor.

The research identified unique "security guards" within the defense system that eliminate rogue immune cells capable of attacking the body.

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

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

Decisive Discoveries

"Their work has been decisive for comprehending how the immune system operates and why we do not all suffer from severe autoimmune diseases," stated the chair of the Nobel Committee.

The team's studies address a fundamental question: In what way does the defense system protect us from countless infections while keeping our healthy cells unharmed?

The immune system uses immune cells that scan for indicators of infection, including viruses and germs it has not met before.

These defenders employ sensors—called receptors—that are generated by chance in countless combinations.

This provides the defense network the capacity to fight a broad range of invaders, but the unpredictability of the mechanism inevitably creates white blood cells that can target the body.

Protectors of the Body

Researchers previously knew that a portion of these problematic defense cells were destroyed in the thymus—where white blood cells mature.

This year's Nobel Prize honors the identification of T-reg cells—described as the body's "security guards"—which patrol the body to neutralize other immune cells that assault the body's own tissues.

It is known that this process fails in self-attack conditions such as juvenile diabetes, MS, and rheumatoid arthritis.

The prize committee stated, "These discoveries have laid the foundation for a new field of investigation and accelerated the creation of innovative treatments, for example for tumors and immune disorders."

In cancer, regulatory T-cells prevent the body from fighting the tumor, so studies are aimed at lowering their quantity.

For autoimmune diseases, experiments are testing increasing regulatory T-cells so the organism is no longer being harmed. A comparable approach could also be useful in minimizing the risks of transplanted organ rejection.

Innovative Experiments

Prof Shimon Sakaguchi, of Osaka University, performed tests on rodents that had their thymus removed, leading to self-attack conditions.

The researcher showed that introducing defense cells from healthy animals could prevent the illness—implying there was a mechanism for blocking immune cells from harming the host.

Mary Brunkow, from the Institute for Systems Biology in a US city, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in a California city, were investigating an genetic immune disorder in mice and people that resulted in the identification of a gene vital for how T-regs function.

"Their pioneering work has uncovered how the body's defenses is kept in check by regulatory T cells, stopping it from mistakenly attacking the healthy cells," said a prominent physiology specialist.

"This research is a striking illustration of how fundamental biological study can have far-reaching consequences for public health."