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The prestigious award in medical science was granted for revolutionary discoveries that illuminate how the immune system attacks dangerous infections while protecting the healthy tissues.

A trio of esteemed researchers—from Japan Shimon Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—received this accolade.

The research uncovered specialized "security guards" within the immune system that eliminate malfunctioning immune cells capable of harming the organism.

The findings are now enabling innovative treatments for autoimmune diseases and malignancies.

These laureates will divide a prize fund valued at 11m SEK.

Decisive Discoveries

"Their work has been essential for comprehending how the immune system functions and why we don't all develop serious autoimmune diseases," stated the head of the award panel.

The trio's studies explain a core question: In what way does the immune system defend us from countless invaders while keeping our own tissues unharmed?

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

These defenders employ sensors—known as recognition units—that are produced randomly in countless variations.

This gives the defense network the capacity to fight a wide array of invaders, but the unpredictability of the process unavoidably produces immune cells that can attack the body.

Security Guards of the Body

Researchers previously knew that a portion of these harmful defense cells were eliminated in the immune organ—the site where immune cells mature.

The latest Nobel Prize recognizes the identification of T-reg cells—described as the immune system's "security guards"—which patrol the body to disarm other defenders that attack the healthy cells.

It is known that this mechanism fails in autoimmune diseases such as type-1 diabetes, MS, and RA.

The Nobel panel added, "The findings have laid the foundation for a novel area of research and accelerated the development of innovative treatments, for example for cancer and immune disorders."

In malignancies, T-regs block the system from fighting the tumor, so research are focused on lowering their quantity.

For self-attack disorders, trials are exploring increasing regulatory T-cells so the organism is not being harmed. A similar method could also be useful in minimizing the chances of organ transplant rejection.

Pioneering Studies

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

He showed that introducing defense cells from healthy animals could stop the disease—suggesting there was a mechanism for preventing defenders from attacking the body.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were investigating an genetic autoimmune disease in mice and humans that led to the discovery of a gene vital for the way T-regs function.

"Their pioneering research has revealed how the body's defenses is kept in check by regulatory T cells, stopping it from accidentally attacking the body's own tissues," said a leading biological science expert.

"This research is a remarkable illustration of how fundamental physiological research can have far-reaching consequences for human health."