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The prestigious award in medical science has been granted for transformative findings that clarify how the body's defense network attacks dangerous infections while sparing the body's own cells.

A trio of renowned researchers—Japan's Prof. Sakaguchi and American scientists Dr. Brunkow and Fred Ramsdell—received this accolade.

Their work identified specialized "security guards" within the immune system that eliminate rogue defense cells that could harming the organism.

These discoveries are now enabling new treatments for autoimmune diseases and malignancies.

These laureates will share a monetary award valued at 11m Swedish kronor.

Decisive Findings

"The work has been decisive for understanding how the body's defenses operates and the reason we don't all develop severe autoimmune diseases," stated the head of the award panel.

The trio's research address a fundamental mystery: In what way does the immune system defend us from countless invaders while keeping our own tissues unharmed?

The immune system employs immune cells that search for signs of infection, including pathogens and bacteria it has never encountered.

These cells utilize sensors—known as receptors—that are produced by chance in countless variations.

That gives the defense network the capacity to fight a wide array of threats, but the unpredictability of the process unavoidably produces immune cells that can target the body.

Protectors of the Body

Researchers previously knew that some of these problematic white blood cells were destroyed in the immune organ—where white blood cells develop.

This year's award honors the identification of T-reg cells—described as the body's "security guards"—which patrol the body to neutralize any immune cells that assault the healthy cells.

We know that this process malfunctions in self-attack conditions such as type-1 diabetes, MS, and RA.

The Nobel panel added, "These findings have laid the foundation for a new field of investigation and accelerated the creation of innovative therapies, for example for tumors and autoimmune diseases."

In cancer, regulatory T-cells prevent the system from fighting the tumor, so research are aimed at reducing their quantity.

For self-attack disorders, trials are testing increasing T-reg cells so the organism is no longer being harmed. A comparable method could also be effective in reducing the chances of transplanted organ failure.

Pioneering Studies

Professor Sakaguchi, of a Japanese institution, performed tests on rodents that had their thymus extracted, leading to self-attack conditions.

The researcher demonstrated that introducing immune cells from healthy animals could prevent the disease—suggesting there was a system for preventing immune cells from harming the host.

Dr. Brunkow, affiliated with the a research center in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited autoimmune disease in mice and humans that resulted in the identification of a genetic factor vital for how regulatory T-cells function.

"The groundbreaking work has revealed how the body's defenses is kept in check by regulatory T cells, preventing it from accidentally attacking the body's own tissues," commented a prominent biological science specialist.

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