Prestigious Prize Recognizes Groundbreaking Immune System Research
The prestigious award in Physiology or Medicine was awarded for transformative discoveries that clarify how the body's defense network targets dangerous infections while protecting the body's own cells.
A trio of renowned scientists—from Japan Shimon Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—received this honor.
The work identified specialized "sentinels" within the defense system that remove malfunctioning immune cells that could harming the organism.
The findings are now enabling innovative therapies for autoimmune diseases and malignancies.
The laureates will divide a monetary award valued at 11 million Swedish kronor.
Decisive Discoveries
"Their work has been essential for comprehending how the immune system operates and why we don't all develop serious autoimmune diseases," stated the head of the Nobel Committee.
This trio's studies explain a core question: In what way does the defense system protect us from countless infections while leaving our healthy cells intact?
Our immune system employs white blood cells that search for signs of disease, including viruses and germs it has never encountered.
Such defenders employ detectors—called recognition units—that are generated by chance in a vast number of variations.
That provides the defense network the capacity to combat a broad range of threats, but the randomness of the mechanism inevitably produces white blood cells that can target the body.
Protectors of the Immune System
Researchers previously knew that some of these harmful defense cells were eliminated in the immune organ—where immune cells mature.
This year's award recognizes the identification of regulatory T-cells—known as the body's "peacekeepers"—which patrol the system to disarm any immune cells that attack the body's own tissues.
It is known that this process malfunctions in self-attack conditions such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.
A prize committee added, "The findings have laid the foundation for a novel area of investigation and accelerated the development of new therapies, for example for cancer and immune disorders."
Regarding malignancies, T-regs prevent the system from fighting the growth, so studies are aimed at lowering their quantity.
In autoimmune diseases, trials are testing boosting T-reg cells so the body is no longer under attack. A comparable method could also be effective in reducing the risks of transplanted organ failure.
Pioneering Studies
Prof Shimon Sakaguchi, of a Japanese institution, conducted experiments on mice that had their immune gland removed, causing self-attack conditions.
He demonstrated that injecting defense cells from healthy animals could prevent the illness—suggesting there was a mechanism for blocking defenders from harming the body.
Dr. Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were studying an inherited immune disorder in rodents and humans that resulted in the discovery of a genetic factor critical for how T-regs function.
"The pioneering research has revealed how the body's defenses is kept in check by regulatory T cells, preventing it from mistakenly targeting the body's own tissues," said a prominent physiology specialist.
"This work is a striking example of how fundamental biological study can have far-reaching consequences for human health."
