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The Nobel Prize in Physiology or Medicine has been awarded for revolutionary discoveries that illuminate how the immune system attacks dangerous infections while protecting the healthy tissues.

Three renowned researchers—Japan's Shimon Sakaguchi and US experts Dr. Brunkow and Fred Ramsdell—received this accolade.

Their research identified unique "sentinels" within the immune system that eliminate rogue defense cells capable of harming the organism.

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

The laureates will share a prize fund valued at 11 million Swedish kronor.

Crucial Discoveries

"Their research has been decisive for comprehending how the immune system functions and the reason we do not all suffer from severe self-attack conditions," stated the head of the award panel.

This trio's studies address a fundamental question: How does the immune system defend us from numerous invaders while leaving our own tissues intact?

Our immune system employs white blood cells that search for indicators of infection, including pathogens and germs it has never encountered.

These defenders utilize sensors—known as recognition units—that are generated by chance in a vast number of combinations.

That gives the immune system the ability to fight a wide array of threats, but the unpredictability of the mechanism inevitably produces immune cells that may target the host.

Protectors of the Body

Scientists earlier understood that a portion of these problematic defense cells were eliminated in the thymus—where white blood cells mature.

This year's award recognizes the identification of T-reg cells—known as the body's "security guards"—which patrol the body to disarm any immune cells that attack the body's own tissues.

We know that this mechanism malfunctions in self-attack conditions such as juvenile diabetes, MS, and RA.

The Nobel panel stated, "These findings have established a novel area of research and spurred the creation of new treatments, for example for tumors and immune disorders."

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

In autoimmune diseases, trials are testing increasing regulatory T-cells so the body is no longer under attack. A comparable approach could also be effective in reducing the risks of transplanted organ failure.

Innovative Experiments

Professor Shimon Sakaguchi, from a Japanese institution, performed experiments on mice that had their thymus removed, causing autoimmune disease.

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

Mary Brunkow, affiliated with the a research center in a US city, and Fred Ramsdell, currently at a biotech firm in San Francisco, were studying an genetic autoimmune disease in mice and people that resulted in the discovery of a genetic factor critical for the way regulatory T-cells function.

"Their groundbreaking research has revealed how the immune system is kept in check by regulatory T cells, stopping it from mistakenly targeting the body's own tissues," said a prominent physiology specialist.

"This work is a striking example of how basic physiological study can have far-reaching implications for public health."