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This year's Nobel Prize in Physiology or Medicine was granted for revolutionary findings that clarify how the body's defense network attacks harmful pathogens while sparing the healthy tissues.

Three renowned researchers—from Japan Shimon Sakaguchi and US scientists Mary Brunkow and Dr. Ramsdell—received this accolade.

Their work uncovered unique "security guards" within the defense system that remove malfunctioning immune cells that could harming the body.

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

These winners will divide a monetary award worth 11 million Swedish kronor.

Crucial Discoveries

"The research has been decisive for comprehending how the body's defenses functions and why we do not all develop serious autoimmune diseases," stated the chair of the Nobel Committee.

The team's studies address a fundamental question: In what way does the defense system protect us from numerous infections while keeping our own tissues intact?

Our immune system employs immune cells that scan for indicators of disease, even pathogens and germs it has never encountered.

These defenders utilize detectors—called receptors—that are produced by chance in a vast number of combinations.

This provides the immune system the ability to combat a broad range of threats, but the unpredictability of the process inevitably produces white blood cells that can target the host.

Security Guards of the Body

Scientists previously understood that a portion of these problematic white blood cells were destroyed in the thymus—where immune cells mature.

The latest Nobel Prize recognizes the identification of regulatory T-cells—described as the body's "peacekeepers"—which patrol the system to neutralize other immune cells that attack the healthy cells.

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

The Nobel panel added, "These findings have laid the foundation for a new field of investigation and spurred the development of innovative therapies, for example for cancer and autoimmune diseases."

Regarding cancer, T-regs prevent the body from attacking the growth, so research are focused on lowering their numbers.

For autoimmune diseases, experiments are exploring boosting regulatory T-cells so the organism is no longer under attack. A similar method could also be effective in reducing the risks of transplanted organ failure.

Innovative Experiments

Professor Sakaguchi, of a Japanese institution, conducted experiments on rodents that had their immune gland removed, causing autoimmune disease.

The researcher demonstrated that injecting defense cells from healthy animals could prevent the illness—implying there was a system for preventing defenders from attacking the body.

Mary Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, now at a biotech firm in a California city, were investigating an genetic autoimmune disease in mice and humans that led to the identification of a genetic factor vital for the way regulatory T-cells function.

"The groundbreaking research has revealed how the body's defenses is kept in check by T-reg cells, preventing it from accidentally attacking the body's own tissues," said a leading biological science specialist.

"This research is a striking illustration of how fundamental biological study can have far-reaching implications for human health."