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

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

Their research uncovered unique "security guards" within the defense system that remove rogue immune cells that could harming the body.

The findings are now enabling innovative therapies for immune disorders and cancer.

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

Decisive Findings

"Their work has been essential for understanding how the body's defenses operates and why we don't all suffer from serious self-attack conditions," commented the head of the award panel.

This trio's studies explain a core question: How does the defense system defend us from numerous invaders while keeping our own tissues intact?

The immune system employs white blood cells that scan for signs of disease, even pathogens and germs it has never encountered.

These defenders utilize sensors—called recognition units—that are generated by chance in a vast number of variations.

That gives the immune system the ability to fight a wide array of threats, but the unpredictability of the mechanism unavoidably creates immune cells that may attack the body.

Security Guards of the Body

Scientists previously knew that a portion of these harmful defense cells were destroyed in the thymus—where white blood cells mature.

This year's award honors the identification of regulatory T-cells—described as the immune system's "security guards"—which patrol the system to disarm any defenders that attack the body's own tissues.

It is known that this process malfunctions in self-attack conditions such as type-1 diabetes, MS, and RA.

The prize committee added, "These discoveries have laid the foundation for a novel area of research and spurred the development of innovative therapies, for instance for cancer and immune disorders."

Regarding malignancies, T-regs prevent the system from attacking the growth, so research are focused on lowering their numbers.

In autoimmune diseases, experiments are exploring boosting regulatory T-cells so the body is not being harmed. A similar approach could also be useful in reducing the chances of transplanted organ rejection.

Innovative Studies

Prof Sakaguchi, of Osaka University, conducted tests on mice that had their thymus extracted, causing self-attack conditions.

The researcher demonstrated that introducing defense cells from other mice could prevent the illness—implying there was a system for preventing defenders from harming the host.

Mary Brunkow, from the a research center in Seattle, and Fred Ramsdell, now at a biotech firm in San Francisco, were investigating an inherited immune disorder in mice and people that led to the discovery of a gene vital for how T-regs operate.

"Their pioneering research has revealed how the immune system is controlled by regulatory T cells, stopping it from mistakenly targeting the healthy cells," said a leading physiology specialist.

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