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This year's prestigious award in medical science has been awarded for transformative findings that clarify how the body's defense network attacks harmful infections while protecting the body's own cells.

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

Their research identified specialized "sentinels" within the defense system that eliminate rogue defense cells that could harming the organism.

These findings are now paving the way for innovative therapies for immune disorders and malignancies.

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

Crucial Findings

"The research has been decisive for comprehending how the immune system operates and why we don't all develop severe self-attack conditions," commented the chair of the Nobel Committee.

The trio's research address a core mystery: In what way does the defense system defend us from countless invaders while keeping our healthy cells intact?

The body's protection system employs white blood cells that search for indicators of disease, even viruses and germs it has never encountered.

These defenders employ detectors—known as receptors—that are generated randomly in a vast number of combinations.

That gives the defense network the capacity to combat a wide array of invaders, but the randomness of the process unavoidably creates immune cells that may attack the host.

Security Guards of the Body

Scientists earlier knew that a portion of these problematic white blood cells were destroyed in the thymus—where white blood cells develop.

The latest award recognizes the identification of T-reg cells—known as the body's "security guards"—which travel through the body to neutralize other immune cells that assault the healthy cells.

We know that this mechanism fails in self-attack conditions such as juvenile 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 therapies, for instance for cancer and immune disorders."

Regarding malignancies, T-regs prevent the body from fighting the tumor, so studies are aimed at lowering their numbers.

In self-attack disorders, experiments are exploring boosting T-reg cells so the organism is no longer being harmed. A similar approach could also be useful in minimizing the risks of transplanted organ failure.

Innovative Studies

Prof Shimon Sakaguchi, of Osaka University, conducted tests on rodents that had their thymus removed, causing autoimmune disease.

He showed that injecting defense cells from other mice could prevent the illness—implying there was a system for preventing immune cells from harming the host.

Dr. Brunkow, from the Institute for Systems Biology in a US city, and Dr. Ramsdell, now at Sonoma Biotherapeutics in a California city, were investigating an inherited autoimmune disease in mice and humans that resulted in the discovery of a genetic factor critical for how T-regs operate.

"The groundbreaking research has revealed how the body's defenses is controlled by regulatory T cells, preventing it from accidentally targeting the healthy cells," said a prominent physiology expert.

"The research is a striking example of how fundamental physiological research can have far-reaching implications for human health."