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This year's Nobel Prize in Physiology or Medicine has been awarded for revolutionary findings that clarify how the body's defense network attacks harmful pathogens while protecting the body's own cells.

Three esteemed researchers—from Japan Prof. Sakaguchi and American experts Mary Brunkow and Fred Ramsdell—share this honor.

Their research uncovered specialized "security guards" within the immune system that remove malfunctioning defense cells capable of harming the organism.

These findings are now enabling new therapies for autoimmune diseases and malignancies.

These winners will share a prize fund valued at 11 million SEK.

Crucial Findings

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

The team's studies address a core question: How does the defense system defend us from numerous invaders while leaving our healthy cells intact?

The immune system employs white blood cells that search for indicators of infection, even pathogens and bacteria it has not met before.

These defenders employ detectors—known as receptors—that are produced randomly in countless variations.

That provides the immune system the capacity to fight a broad range of invaders, but the unpredictability of the process inevitably produces white blood cells that can attack the body.

Security Guards of the Immune System

Scientists previously understood that a portion of these problematic defense cells were destroyed in the immune organ—where immune cells develop.

The latest Nobel Prize recognizes the discovery of T-reg cells—known as the body's "peacekeepers"—which travel through the system to neutralize any immune cells that assault the body's own tissues.

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

A prize committee stated, "The findings have laid the foundation for a novel area of investigation and spurred the development of new therapies, for example for tumors and immune disorders."

Regarding cancer, regulatory T-cells block the body from attacking the tumor, so research are focused on reducing their numbers.

In self-attack disorders, experiments are exploring boosting T-reg cells so the body is not under attack. A comparable method could also be useful in reducing the risks of organ transplant rejection.

Pioneering Studies

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

He demonstrated that injecting immune cells from other mice could prevent the illness—suggesting there was a mechanism for preventing immune cells from attacking the body.

Dr. Brunkow, from the a research center in a US city, and Fred Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited immune disorder in mice and people that led to the discovery of a genetic factor vital for how regulatory T-cells operate.

"The groundbreaking research has revealed how the body's defenses is controlled by regulatory T cells, stopping it from mistakenly targeting the healthy cells," commented a prominent physiology expert.

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