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

Three esteemed scientists—Japan's Shimon Sakaguchi and American scientists Mary Brunkow and Dr. Ramsdell—received this accolade.

Their work identified specialized "security guards" within the immune system that eliminate rogue immune cells that could harming the organism.

The discoveries are now paving the way for innovative therapies for immune disorders and cancer.

These winners will divide a prize fund valued at 11m SEK.

Decisive Discoveries

"The research has been decisive for comprehending how the immune system operates and why we do not all develop severe self-attack conditions," commented the chair of the award panel.

This trio's research address a core mystery: How does the immune system protect us from countless invaders while keeping our healthy cells intact?

The immune system uses white blood cells that search for indicators of disease, including viruses and germs it has not met before.

These cells employ detectors—known as recognition units—that are generated by chance in countless combinations.

This gives the defense network the ability to combat a broad range of threats, but the randomness of the process inevitably produces immune cells that may target the host.

Security Guards of the Immune System

Scientists previously knew that some of these problematic defense cells were destroyed in the thymus—the site where white blood cells mature.

The latest award recognizes the discovery of T-reg cells—known as the body's "peacekeepers"—which patrol the body to neutralize any defenders that assault the healthy cells.

It is known that this mechanism fails in self-attack conditions such as juvenile diabetes, MS, and RA.

The prize committee added, "The findings have laid the foundation for 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 system from attacking the growth, so studies are aimed at lowering their numbers.

For autoimmune diseases, trials are testing increasing T-reg cells so the organism is not being harmed. A comparable approach could also be useful in reducing the chances of organ transplant rejection.

Innovative Studies

Prof Shimon Sakaguchi, from a Japanese institution, conducted tests on rodents that had their thymus removed, leading to self-attack conditions.

The researcher demonstrated that injecting defense cells from healthy animals could prevent the disease—implying there was a system for preventing defenders from harming the host.

Mary Brunkow, affiliated with the a research center in Seattle, and Dr. Ramsdell, currently at Sonoma Biotherapeutics in a California city, were studying an genetic immune disorder in rodents and humans that led to the discovery of a gene critical for the way T-regs function.

"The pioneering research has revealed how the immune system is kept in check by regulatory T cells, preventing it from accidentally attacking the body's own tissues," commented a leading biological science specialist.

"The work is a remarkable illustration of how basic biological study can have broad consequences for public health."