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This year's prestigious award in medical science has been granted for revolutionary discoveries that illuminate how the body's defense network targets harmful infections while protecting the healthy tissues.

A trio of renowned scientists—from Japan Shimon Sakaguchi and US experts Mary Brunkow and Fred Ramsdell—received this accolade.

Their research uncovered unique "sentinels" within the defense system that eliminate rogue defense cells that could harming the body.

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

The laureates will share a monetary award worth 11m SEK.

Crucial Findings

"Their work has been essential for comprehending how the body's defenses functions and the reason we don't all suffer from severe self-attack conditions," commented the chair of the award panel.

This trio's studies explain a core question: How does the defense system protect us from countless infections while keeping our own tissues unharmed?

The body's protection system employs immune cells that search for indicators of infection, even viruses and germs it has not met before.

Such cells employ detectors—called receptors—that are generated by chance in countless variations.

That gives the defense network the capacity to fight a wide array of threats, but the unpredictability of the mechanism unavoidably creates immune cells that may attack the host.

Protectors of the Immune System

Scientists earlier knew that some of these harmful defense cells were eliminated in the immune organ—the site where immune cells mature.

This year's award recognizes the identification of regulatory T-cells—described as the body's "peacekeepers"—which patrol the body to neutralize other defenders that attack the healthy cells.

We know that this process malfunctions in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and rheumatoid arthritis.

The prize committee stated, "These findings have laid the foundation for a novel area of research and spurred the creation of innovative treatments, for instance for cancer and immune disorders."

In cancer, T-regs block the system from attacking the tumor, so studies are aimed at lowering their numbers.

For self-attack disorders, experiments are exploring increasing regulatory T-cells so the organism is not being harmed. A similar method could also be effective in minimizing the chances of transplanted organ failure.

Pioneering Experiments

Professor Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus removed, causing self-attack conditions.

The researcher showed that introducing defense cells from other animals could prevent the illness—suggesting there was a mechanism for blocking defenders from attacking the host.

Dr. Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Dr. Ramsdell, now at a biotech firm in San Francisco, were studying an inherited immune disorder in rodents and people that led to the discovery of a genetic factor critical for the way regulatory T-cells operate.

"Their pioneering research has uncovered how the body's defenses is controlled by T-reg cells, preventing it from accidentally attacking the healthy cells," commented a leading physiology expert.

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