Prestigious Award Recognizes Groundbreaking Body's Defenses Discoveries

This year's Nobel Prize in Physiology or Medicine was granted for revolutionary findings that illuminate how the body's defense network attacks harmful infections while sparing the body's own cells.

Three esteemed scientists—from Japan Shimon Sakaguchi and US experts Mary Brunkow and Dr. Ramsdell—received this honor.

The research uncovered specialized "security guards" within the immune system that remove malfunctioning immune cells capable of attacking the organism.

These findings are now paving the way for new therapies for autoimmune diseases and cancer.

The laureates will share a monetary award worth 11m SEK.

Crucial Discoveries

"Their work has been decisive for understanding how the immune system functions and why we do not all develop serious self-attack conditions," commented the head of the award panel.

The team's research explain a core question: In what way does the immune system defend us from countless infections while keeping our healthy cells unharmed?

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

These defenders utilize sensors—called recognition units—that are produced by chance in a vast number of combinations.

That gives the defense network the ability to fight a broad range of threats, but the unpredictability of the process unavoidably creates white blood cells that can attack the host.

Protectors of the Body

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

This year's Nobel Prize recognizes the discovery of T-reg cells—described as the immune system's "peacekeepers"—which patrol the body to disarm any immune cells that attack the healthy cells.

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

A prize committee added, "The findings have laid the foundation for a new field of research and accelerated the creation of innovative therapies, for instance for tumors and immune disorders."

In cancer, regulatory T-cells prevent the body from attacking the tumor, so research are aimed at reducing their quantity.

In self-attack disorders, experiments are exploring increasing regulatory T-cells so the body is not being harmed. A similar method could also be useful in reducing the chances of organ transplant rejection.

Pioneering Studies

Professor Shimon Sakaguchi, of a Japanese institution, conducted tests on mice that had their immune gland removed, leading to autoimmune disease.

He demonstrated that introducing immune cells from other mice could prevent the illness—suggesting there was a mechanism for blocking immune cells from harming the body.

Mary Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, currently at a biotech firm in a California city, were studying an genetic immune disorder in mice and people that resulted in the identification of a genetic factor critical for how regulatory T-cells function.

"Their pioneering research has revealed how the body's defenses is controlled by T-reg cells, preventing it from accidentally attacking the healthy cells," said a prominent physiology expert.

"The research is a striking example of how fundamental physiological research can have far-reaching implications for public health."