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The prestigious award in medical science was granted for transformative discoveries that illuminate how the body's defense network attacks harmful pathogens while sparing the body's own cells.

A trio of renowned researchers—from Japan Prof. Sakaguchi and US experts Dr. Brunkow and Dr. Ramsdell—received this honor.

Their research identified specialized "security guards" within the defense system that eliminate malfunctioning defense cells that could harming the organism.

The findings are now enabling new treatments for autoimmune diseases and malignancies.

The laureates will share a prize fund valued at 11 million Swedish kronor.

Crucial Findings

"Their research has been essential for comprehending how the body's defenses functions and why we don't all develop severe self-attack conditions," stated the chair of the award panel.

The team's research address a fundamental question: How does the immune system protect us from countless invaders while keeping our own tissues unharmed?

Our body's protection system employs white blood cells that search for indicators of infection, including viruses and germs it has not met before.

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

That provides the immune system the ability to combat a broad range of threats, but the unpredictability of the process unavoidably creates immune cells that may target the body.

Protectors of the Body

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

This year's award honors the identification of T-reg cells—described as the body's "security guards"—which patrol the body to neutralize any immune cells that assault the body's own tissues.

We know that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, MS, and RA.

A prize committee added, "The findings have established a novel area of investigation and spurred the development of innovative treatments, for instance for tumors and autoimmune diseases."

Regarding malignancies, T-regs prevent the system from attacking the growth, so studies are aimed at reducing their quantity.

In self-attack disorders, trials are exploring increasing T-reg cells so the body is no longer under attack. A similar approach could also be effective in reducing the risks of transplanted organ rejection.

Innovative Experiments

Prof Shimon Sakaguchi, of a Japanese institution, conducted tests on rodents that had their immune gland extracted, leading to self-attack conditions.

He showed that introducing immune cells from healthy animals could prevent the illness—suggesting there was a system for blocking immune cells from attacking the body.

Dr. Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at a biotech firm in a California city, were investigating an genetic autoimmune disease in mice and people that resulted in the identification of a genetic factor critical for how T-regs function.

"The groundbreaking research has revealed how the immune system is controlled by T-reg cells, stopping it from mistakenly targeting the healthy cells," commented a prominent physiology expert.

"The work is a remarkable example of how fundamental physiological study can have far-reaching implications for human health."