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This year's Nobel Prize in medical science was awarded for transformative discoveries that clarify how the immune system attacks harmful infections while sparing the body's own cells.

Three renowned scientists—Japan's Prof. Sakaguchi and US experts Mary Brunkow and Fred Ramsdell—share this accolade.

The research identified specialized "security guards" within the immune system that eliminate rogue immune cells capable of harming the organism.

These discoveries are now enabling new treatments for immune disorders and cancer.

The winners will divide a monetary award worth 11m Swedish kronor.

Crucial Discoveries

"Their work has been essential for comprehending how the immune system operates and the reason we don't all suffer from severe self-attack conditions," stated the chair of the Nobel Committee.

The trio's studies explain a core question: In what way does the defense system defend us from numerous infections while keeping our own tissues unharmed?

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

Such defenders utilize sensors—known as receptors—that are produced randomly in countless variations.

This provides the defense network the capacity to combat a wide array of threats, but the randomness of the mechanism inevitably produces white blood cells that may attack the body.

Protectors of the Body

Researchers earlier knew that a portion of these harmful defense cells were eliminated in the thymus—where white blood cells develop.

The latest Nobel Prize honors the identification of T-reg cells—known as the body's "security guards"—which patrol the system to neutralize other defenders that attack the healthy cells.

It is known that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

A Nobel panel added, "These findings have laid the foundation for a novel area of investigation and accelerated the creation of innovative therapies, for instance for tumors and immune disorders."

In cancer, T-regs block the body from fighting the tumor, so research are aimed at reducing their quantity.

For self-attack disorders, experiments are exploring boosting T-reg cells so the body is not being harmed. A comparable approach could also be effective in minimizing the chances of organ transplant rejection.

Innovative Studies

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

The researcher demonstrated that injecting defense cells from healthy mice could prevent the illness—implying there was a mechanism for blocking defenders from harming the host.

Mary Brunkow, from the a research center in Seattle, and Dr. Ramsdell, currently at a biotech firm in a California city, were studying an inherited autoimmune disease in rodents and humans that resulted in the identification of a genetic factor critical for how regulatory T-cells operate.

"The groundbreaking work has uncovered how the body's defenses is controlled by T-reg cells, stopping it from accidentally attacking the body's own tissues," said a prominent physiology specialist.

"This research is a striking example of how basic biological study can have broad implications for human health."