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This year's prestigious award in medical science was granted for revolutionary discoveries that illuminate how the immune system attacks dangerous infections while protecting the healthy tissues.

Three renowned scientists—from Japan Shimon Sakaguchi and US scientists Mary Brunkow and Fred Ramsdell—received this honor.

Their research identified unique "sentinels" within the defense system that eliminate malfunctioning defense cells that could harming the body.

These discoveries are now paving the way for innovative therapies for immune disorders and cancer.

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

Crucial Findings

"The research has been essential for understanding how the body's defenses operates and the reason we don't all develop serious self-attack conditions," stated the head of the Nobel Committee.

The team's studies explain a fundamental question: How does the defense system defend us from numerous invaders while keeping our healthy cells intact?

Our immune system uses white blood cells that search for signs of disease, including pathogens and bacteria it has never encountered.

These defenders utilize detectors—known as recognition units—that are produced randomly in a vast number of combinations.

This gives the immune system the ability to fight a broad range of threats, but the unpredictability of the process inevitably produces immune cells that can attack the body.

Protectors of the Immune System

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

The latest Nobel Prize honors the discovery of regulatory T-cells—known as the body's "security guards"—which patrol the system to neutralize any defenders that assault the body's own tissues.

We know that this mechanism malfunctions in self-attack conditions such as juvenile diabetes, multiple sclerosis, and rheumatoid arthritis.

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

In cancer, regulatory T-cells block the system from fighting the growth, so research are focused on reducing their numbers.

For self-attack disorders, trials are exploring increasing T-reg cells so the body is not under attack. A similar approach could also be useful in reducing the chances of transplanted organ failure.

Innovative Experiments

Prof Shimon Sakaguchi, from Osaka University, performed experiments on rodents that had their thymus extracted, leading to self-attack conditions.

The researcher demonstrated that injecting defense cells from healthy animals could prevent the illness—suggesting there was a mechanism for blocking immune cells from harming the body.

Dr. Brunkow, from the a research center in a US city, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited autoimmune disease in mice and humans that resulted in the discovery of a gene vital for the way T-regs operate.

"Their groundbreaking work has revealed how the body's defenses is controlled by regulatory T cells, preventing it from accidentally attacking the healthy cells," said a prominent biological science specialist.

"This research is a striking illustration of how fundamental physiological research can have far-reaching consequences for human health."