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This year's Nobel Prize in medical science has been awarded for revolutionary findings that clarify how the immune system targets dangerous infections while sparing the body's own cells.

A trio of renowned scientists—Japan's Shimon Sakaguchi and American experts Dr. Brunkow and Dr. Ramsdell—received this honor.

Their work uncovered specialized "sentinels" within the defense system that remove rogue immune cells that could attacking the organism.

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

These winners will share a prize fund worth 11 million Swedish kronor.

Crucial Discoveries

"Their research has been essential for comprehending how the immune system operates and the reason we don't all suffer from severe autoimmune diseases," commented the head of the Nobel Committee.

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

The immune system uses immune cells that scan for indicators of disease, even viruses and germs it has not met before.

These defenders utilize sensors—known as receptors—that are generated by chance in countless variations.

This gives the defense network the ability to fight a broad range of threats, but the unpredictability of the mechanism inevitably creates immune cells that may attack the host.

Security Guards of the Immune System

Researchers previously knew that some of these harmful white blood cells were eliminated in the immune organ—where immune cells mature.

The latest Nobel Prize recognizes the discovery of regulatory T-cells—described as the body's "peacekeepers"—which travel through the system to disarm other immune cells that assault the body's own tissues.

We know that this process fails in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

A prize committee stated, "The discoveries have laid the foundation for a new field of research and spurred the creation of innovative treatments, for example for cancer and autoimmune diseases."

Regarding malignancies, 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 T-reg cells so the body is not under attack. A similar approach could also be effective in reducing the risks of transplanted organ rejection.

Innovative Experiments

Prof Sakaguchi, from Osaka University, performed tests on rodents that had their immune gland removed, causing self-attack conditions.

The researcher showed that injecting immune cells from other mice could prevent the disease—implying there was a mechanism for preventing defenders from attacking the body.

Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were studying an genetic immune disorder in mice and people that resulted in the discovery of a gene critical for how T-regs operate.

"Their pioneering work has revealed how the immune system is controlled by regulatory T cells, stopping it from mistakenly attacking the body's own tissues," commented a prominent physiology specialist.

"The research is a striking illustration of how fundamental biological research can have broad consequences for public health."