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The prestigious award in Physiology or Medicine has been granted for revolutionary discoveries that clarify how the immune system targets dangerous infections while sparing the healthy tissues.

Three renowned scientists—Japan's Shimon Sakaguchi and American scientists Dr. Brunkow and Fred Ramsdell—received this accolade.

Their research uncovered specialized "security guards" within the defense system that remove rogue immune cells that could attacking the organism.

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

The winners will divide a monetary award worth 11 million Swedish kronor.

Crucial Discoveries

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

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

The immune system employs immune cells that scan for signs of infection, including viruses and germs it has never encountered.

Such cells utilize detectors—known as receptors—that are produced by chance in a vast number of combinations.

That gives the immune system the ability to fight a broad range of threats, but the randomness of the process inevitably creates white blood cells that may attack the host.

Security Guards of the Immune System

Scientists previously understood that a portion of these problematic white blood cells were destroyed in the thymus—where immune cells mature.

The latest award recognizes the discovery of regulatory T-cells—described as the body's "peacekeepers"—which travel through the body to neutralize other immune cells that attack the body's own tissues.

We know that this process fails in autoimmune diseases such as type-1 diabetes, MS, and RA.

The prize committee stated, "The findings have laid the foundation for a novel area of investigation and accelerated the development of new therapies, for instance for tumors and immune disorders."

Regarding malignancies, regulatory T-cells prevent the body from fighting the growth, so research are aimed at reducing their quantity.

For autoimmune diseases, experiments are testing boosting T-reg cells so the organism is not under attack. A comparable method could also be useful in reducing the risks of organ transplant failure.

Pioneering Studies

Prof Shimon Sakaguchi, from Osaka University, conducted tests on mice that had their immune gland removed, causing autoimmune disease.

The researcher demonstrated that introducing immune cells from other animals could stop the illness—implying there was a system for blocking defenders from harming the body.

Mary Brunkow, from the a research center in a US city, and Dr. Ramsdell, now at a biotech firm in San Francisco, were studying an genetic immune disorder in rodents and people that led to the discovery of a genetic factor vital for how T-regs operate.

"The pioneering work has revealed how the immune system is kept in check by T-reg cells, preventing it from accidentally attacking the healthy cells," commented a prominent biological science expert.

"This work is a remarkable example of how basic biological research can have broad consequences for public health."