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The prestigious award in medical science has been awarded for revolutionary discoveries that clarify how the body's defense network targets dangerous infections while sparing the body's own cells.

A trio of esteemed researchers—from Japan Shimon Sakaguchi and US experts Mary Brunkow and Dr. Ramsdell—share this accolade.

The work uncovered unique "security guards" within the immune system that eliminate malfunctioning defense cells that could harming the organism.

These findings are now paving the way for innovative treatments for autoimmune diseases and cancer.

These laureates will share a prize fund valued at 11 million SEK.

Crucial Findings

"The work has been decisive for understanding how the immune system operates and the reason we don't all suffer from serious self-attack conditions," stated the chair of the Nobel Committee.

The team's research address a fundamental mystery: How does the defense system defend us from countless invaders while keeping our healthy cells intact?

The body's protection system uses white blood cells that scan for indicators of infection, even viruses and bacteria it has never encountered.

Such cells utilize sensors—known as receptors—that are generated randomly in a vast number of variations.

That provides the defense network the ability to combat a broad range of threats, but the unpredictability of the process inevitably creates immune cells that may target the body.

Protectors of the Body

Researchers earlier knew that some of these problematic white blood cells were eliminated in the thymus—where white blood cells develop.

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

We know that this process fails in self-attack conditions such as juvenile diabetes, MS, and rheumatoid arthritis.

The prize committee stated, "These discoveries have established a novel area of research and spurred the development of new treatments, for example for tumors and immune disorders."

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

In self-attack disorders, trials are testing boosting T-reg cells so the body is no longer under attack. A comparable approach could also be effective in reducing the chances of organ transplant rejection.

Pioneering Studies

Professor Sakaguchi, of Osaka University, performed experiments on mice that had their immune gland extracted, leading to self-attack conditions.

He demonstrated that injecting immune cells from healthy mice could prevent the disease—suggesting there was a mechanism for preventing defenders from harming the host.

Dr. Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an genetic autoimmune disease in mice and humans that resulted in the identification of a gene critical for the way regulatory T-cells function.

"The groundbreaking work has revealed how the body's defenses is controlled by T-reg cells, preventing it from mistakenly targeting the body's own tissues," commented a leading biological science specialist.

"The work is a remarkable illustration of how basic physiological study can have broad implications for public health."