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The prestigious award in Physiology or Medicine has been granted for revolutionary discoveries that clarify how the body's defense network attacks harmful pathogens while sparing the body's own cells.

Three renowned scientists—from Japan Prof. Sakaguchi and American scientists Mary Brunkow and Fred Ramsdell—share this accolade.

The research identified unique "security guards" within the defense system that eliminate rogue defense cells capable of attacking the body.

These discoveries are now enabling innovative treatments for immune disorders and malignancies.

These winners will share a monetary award worth 11 million SEK.

Crucial Findings

"Their research has been decisive for comprehending how the immune system functions and why we do not all develop severe self-attack conditions," stated the chair of the Nobel Committee.

This trio's research explain a fundamental mystery: In what way does the immune system defend us from numerous infections while leaving our healthy cells unharmed?

Our body's protection system uses white blood cells that search for indicators of infection, even pathogens and germs it has not met before.

Such defenders utilize detectors—known as receptors—that are generated by chance in countless variations.

This provides the immune system the capacity to combat a broad range of invaders, but the randomness of the process unavoidably produces immune cells that can target the body.

Security Guards of the Body

Researchers previously knew that some of these problematic defense cells were destroyed in the immune organ—where white blood cells mature.

This year's Nobel Prize recognizes the discovery of regulatory T-cells—described as the body's "security guards"—which patrol the system to neutralize other immune cells that attack the body's own tissues.

We know that this mechanism fails in self-attack conditions such as type-1 diabetes, multiple sclerosis, and RA.

The Nobel panel added, "These findings have established a novel area of research and accelerated the development of new therapies, for instance for tumors and autoimmune diseases."

Regarding cancer, regulatory T-cells block the body from attacking the growth, so research are focused on reducing their numbers.

In self-attack disorders, trials are testing boosting T-reg cells so the body is not being harmed. A similar approach could also be useful in minimizing the risks of transplanted organ failure.

Pioneering Studies

Professor Shimon Sakaguchi, from a Japanese institution, performed tests on mice that had their immune gland removed, causing self-attack conditions.

The researcher showed that injecting immune cells from healthy animals could stop the illness—implying there was a system for blocking defenders from harming the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were studying an inherited autoimmune disease in rodents and humans that led to the identification of a gene vital for how regulatory T-cells operate.

"Their pioneering research has uncovered how the body's defenses is controlled by regulatory T cells, preventing it from accidentally targeting the body's own tissues," commented a leading biological science specialist.

"This research is a remarkable illustration of how fundamental physiological study can have far-reaching implications for human health."