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This year's Nobel Prize in medical science was granted for revolutionary findings that illuminate how the body's defense network targets harmful pathogens while protecting the healthy tissues.

Three esteemed scientists—Japan's Shimon Sakaguchi and US experts Mary Brunkow and Dr. Ramsdell—share this honor.

Their research identified specialized "security guards" within the immune system that eliminate rogue defense cells capable of attacking the organism.

The findings are now paving the way for new therapies for autoimmune diseases and malignancies.

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

Crucial Findings

"The research has been decisive for comprehending how the body's defenses operates and the reason we do not all suffer from severe self-attack conditions," commented the head of the Nobel Committee.

The trio's studies explain a fundamental mystery: How does the immune system protect us from countless invaders while keeping our healthy cells intact?

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

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

This provides the defense network the capacity to fight a broad range of invaders, but the randomness of the process unavoidably produces white blood cells that may target the body.

Protectors of the Body

Scientists previously knew that a portion of these harmful defense cells were eliminated in the immune organ—where immune cells mature.

The latest Nobel Prize honors the discovery of regulatory T-cells—known as the body's "security guards"—which patrol the body to disarm other defenders that assault 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, "These findings have established a novel area of research and spurred the creation of new treatments, for example for tumors and immune disorders."

Regarding cancer, T-regs prevent the body from fighting the growth, so research are focused on lowering their numbers.

In self-attack disorders, trials are testing increasing regulatory T-cells so the organism is no longer under attack. A similar approach could also be effective in reducing the chances of transplanted organ rejection.

Innovative Experiments

Professor Shimon Sakaguchi, from a Japanese institution, conducted tests on mice that had their immune gland extracted, causing autoimmune disease.

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

Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were investigating an inherited autoimmune disease in mice and humans that led to the identification of a genetic factor vital for the way T-regs function.

"Their pioneering work has uncovered how the immune system is controlled by regulatory T cells, stopping it from accidentally attacking the body's own tissues," commented a prominent physiology specialist.

"This work is a remarkable example of how fundamental physiological study can have broad consequences for human health."