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The Nobel Prize in medical science has been awarded for revolutionary findings that illuminate how the immune system attacks harmful infections while sparing the healthy tissues.

Three esteemed researchers—from Japan Prof. Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—share this accolade.

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

These findings are now paving the way for innovative treatments for autoimmune diseases and malignancies.

These laureates will divide a monetary award worth 11m Swedish kronor.

Crucial Discoveries

"The work has been decisive for comprehending how the body's defenses functions and why we do not all suffer from serious autoimmune diseases," stated the chair of the award panel.

The trio's studies address a core question: In what way does the immune system protect us from numerous invaders while keeping our healthy cells intact?

Our immune system uses immune cells that scan for indicators of infection, even pathogens and germs it has never encountered.

Such defenders employ detectors—known as recognition units—that are generated by chance in a vast number of variations.

This gives the defense network the ability to combat a broad range of invaders, but the randomness of the process unavoidably produces immune cells that may attack the host.

Protectors of the Immune System

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

The latest award honors the identification of regulatory T-cells—known as the body's "peacekeepers"—which patrol the body to neutralize other immune cells that attack the healthy cells.

We know that this process fails in self-attack conditions such as type-1 diabetes, MS, and RA.

A Nobel panel added, "These findings have established a new field of research and spurred the development of innovative treatments, for instance for cancer and autoimmune diseases."

In cancer, regulatory T-cells block the body from attacking the growth, so research are aimed at reducing their quantity.

In autoimmune diseases, experiments are exploring increasing regulatory T-cells so the organism is no longer under attack. A similar approach could also be effective in minimizing the chances of transplanted organ rejection.

Pioneering Studies

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

The researcher showed that injecting defense cells from other mice could stop the disease—implying there was a system for blocking defenders from harming the host.

Dr. Brunkow, affiliated with the a research center in Seattle, and Fred Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an genetic autoimmune disease in rodents and humans that resulted in the discovery of a genetic factor critical for how T-regs operate.

"The groundbreaking research has revealed how the body's defenses is controlled by T-reg cells, stopping it from mistakenly attacking the healthy cells," commented a leading physiology expert.

"The research is a striking example of how basic biological research can have far-reaching implications for human health."