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The prestigious award in medical science has been awarded for revolutionary findings that clarify how the immune system attacks harmful pathogens while sparing the body's own cells.

Three esteemed researchers—from Japan Prof. Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—received this honor.

The work identified specialized "sentinels" within the defense system that eliminate rogue defense cells that could attacking the organism.

The discoveries are now paving the way for innovative treatments for immune disorders and malignancies.

The laureates will share a monetary award worth 11m SEK.

Decisive Findings

"The research has been essential for understanding how the immune system functions and the reason we do not all suffer from serious self-attack conditions," stated the chair of the Nobel Committee.

The team's studies explain a fundamental mystery: In what way does the immune system defend us from countless invaders while leaving our healthy cells intact?

The immune system employs white blood cells that search for signs of disease, including pathogens and bacteria it has not met before.

These defenders employ sensors—known as receptors—that are generated randomly in a vast number of variations.

This gives the immune system the ability to fight a wide array of threats, but the unpredictability of the process inevitably produces immune cells that can target the body.

Security Guards of the Body

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

This year's Nobel Prize recognizes the identification of T-reg cells—described as the body's "security guards"—which patrol the body to disarm other immune cells that assault the healthy cells.

It is known that this process malfunctions in self-attack conditions such as juvenile diabetes, multiple sclerosis, and RA.

A prize committee added, "These discoveries have established a novel area of investigation and accelerated the creation of innovative treatments, for example for cancer and immune disorders."

In malignancies, T-regs prevent the system from fighting the tumor, so studies are aimed at lowering their quantity.

In autoimmune diseases, experiments are testing increasing regulatory T-cells so the body is not under attack. A similar method could also be effective in minimizing the chances of organ transplant rejection.

Innovative Experiments

Prof Shimon Sakaguchi, from Osaka University, conducted experiments on mice that had their thymus extracted, causing self-attack conditions.

He showed that injecting immune cells from healthy mice could stop the illness—implying there was a mechanism for blocking immune cells from harming the body.

Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an inherited autoimmune disease in rodents and humans that resulted in the discovery of a genetic factor vital for the way regulatory T-cells operate.

"The groundbreaking research has revealed how the body's defenses is controlled by regulatory T cells, stopping it from mistakenly attacking the healthy cells," said a prominent biological science specialist.

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