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This year's prestigious award in Physiology or Medicine has been granted for revolutionary findings that clarify how the body's defense network attacks harmful pathogens while sparing the body's own cells.

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

Their work identified unique "sentinels" within the immune system that eliminate rogue defense cells that could harming the body.

The findings are now enabling new treatments for immune disorders and cancer.

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

Decisive Findings

"The work has been essential for understanding how the body's defenses functions and the reason we don't all develop serious autoimmune diseases," stated the chair of the award panel.

This team's research address a core question: In what way does the defense system protect us from numerous invaders while keeping our own tissues unharmed?

Our body's protection system uses white blood cells that search for signs of infection, including pathogens and germs it has never encountered.

These defenders employ detectors—known as receptors—that are generated by chance in countless combinations.

This gives the defense network the ability to fight a wide array of threats, but the randomness of the mechanism inevitably creates white blood cells that may target the host.

Security Guards of the Body

Researchers previously understood that some of these problematic white blood cells were eliminated in the thymus—where immune cells develop.

The latest Nobel Prize honors the discovery of regulatory T-cells—known as the body's "security guards"—which patrol the body to disarm other immune cells that attack the healthy cells.

It is known that this process malfunctions in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

A prize committee stated, "These findings have laid the foundation for a new field of research and spurred the development of new treatments, for instance for cancer and immune disorders."

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

For autoimmune diseases, trials are testing boosting regulatory T-cells so the body is no longer being harmed. A comparable method could also be useful in minimizing the risks of organ transplant rejection.

Innovative Studies

Prof Sakaguchi, of a Japanese institution, conducted tests on rodents that had their immune gland removed, leading to self-attack conditions.

He showed that injecting defense cells from other mice could stop the illness—suggesting there was a mechanism for blocking immune cells from attacking the body.

Mary Brunkow, affiliated with the a research center in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an genetic immune disorder in mice and humans that resulted in the discovery of a genetic factor vital for how regulatory T-cells operate.

"The groundbreaking research has revealed how the immune system is controlled by regulatory T cells, preventing it from accidentally attacking the body's own tissues," said a leading biological science specialist.

"The research is a striking illustration of how basic biological study can have far-reaching implications for human health."