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

A trio of esteemed researchers—from Japan Prof. Sakaguchi and American scientists Dr. Brunkow and Fred Ramsdell—received this honor.

The work uncovered unique "security guards" within the immune system that remove malfunctioning immune cells that could harming the organism.

The findings are now paving the way for new treatments for immune disorders and cancer.

These laureates will divide a prize fund worth 11m Swedish kronor.

Crucial Findings

"Their work has been essential for comprehending how the body's defenses operates and why we don't all develop severe autoimmune diseases," stated the chair of the Nobel Committee.

This team's studies address a core mystery: In what way does the defense system defend us from countless infections while keeping our own tissues unharmed?

The body's protection system employs immune cells that scan for signs of disease, including viruses and germs it has not met before.

These cells employ detectors—known as receptors—that are produced randomly in countless variations.

This gives the immune system the capacity to fight a broad range of invaders, but the randomness of the mechanism unavoidably creates immune cells that can attack the body.

Security Guards of the Body

Researchers previously knew that some of these harmful defense cells were destroyed in the immune organ—the site where immune cells mature.

The latest Nobel Prize honors the discovery of regulatory T-cells—known as the immune system's "security guards"—which patrol the system to neutralize other defenders that assault the body's own tissues.

It is known that this process fails in autoimmune diseases such as type-1 diabetes, MS, and rheumatoid arthritis.

A Nobel panel stated, "The discoveries have established a new field of research and spurred the development of innovative therapies, for example for cancer and autoimmune diseases."

In cancer, T-regs prevent the body from attacking the growth, so research are aimed at lowering their quantity.

For autoimmune diseases, trials are testing boosting regulatory T-cells so the organism is no longer being harmed. A comparable approach could also be useful in reducing the risks of transplanted organ failure.

Innovative Studies

Professor Shimon Sakaguchi, from Osaka University, conducted tests on rodents that had their immune gland extracted, causing self-attack conditions.

He showed that injecting immune cells from healthy mice could stop the disease—suggesting there was a mechanism for blocking defenders from attacking the host.

Dr. Brunkow, from the a research center in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in San Francisco, were investigating an inherited immune disorder in rodents and humans that led to the discovery of a genetic factor vital for the way regulatory T-cells function.

"Their groundbreaking research has uncovered how the body's defenses is kept in check by T-reg cells, stopping it from mistakenly attacking the healthy cells," commented a prominent physiology expert.

"This work is a striking example of how basic biological study can have far-reaching consequences for human health."